GB2053338A

GB2053338A - Door Lock

Info

Publication number: GB2053338A
Application number: GB8001741A
Authority: GB
Original assignee: JANS AND HEINSDORF GmbH
Current assignee: JANS AND HEINSDORF GmbH
Priority date: 1979-06-01
Filing date: 1980-01-18
Publication date: 1981-02-04
Also published as: GB2053338B

Abstract

A door lock includes a housing 2 attached at one end to a mounting plate 4. A bolt 6 projects outwardly from the mounting plate and is movably displaceable through the plate into the housing. The bolt is connected via a bolt pin 12 to an actuating member 7 located within the housing and springs associated with the bolt and the actuating member bias the bolt outwardly from the housing. A tumbler 18 within the housing is in operative contact with the actuating member for displacing the bolt into the housing. The tumbler has an actuating projection 19 which contacts roller type catch members 20 on the actuating member for displacing the bolt. The tumbler can be formed of one or two parts. If a locking arrangement is to be employed, the tumbler is formed of two parts with each having an outwardly projecting locking member. A locking element is selectively positionable within the housing for locking one of the locking members. The actuating member includes cams for unlocking the locked engagement of the locking element and the locking member. <IMAGE>

Description

SPECIFICATION Door Lock The present invention is directed to a door lock operated by lever handles and it can include a locking device for effecting a locking action on one or the other side of the door. The invention is directed to the type of door lock used in the U.S.

market. As a rule, such locks are inserted into a one-inch bore in a door and have one springloaded locking bolt, they do not include a separate safety bolt actuated by a key.

Locks of this type conventionally use a rotary knob. Accordingly, a relatively weak spring can be used for the locking bolt and its force is usually sufficient to return the rotary knob which is symmetrical about its axis of rotation. If lever handles, however, as used extensively in Europe, are employed in connection with such locks, the force of the locking bolt spring is frequently insufficient to compensate the torque which counteracts the spring force and results from the construction and weight of the lever handles.

Accordingly, the lever handles, also called door grips, tend to "sag" with the result that the bolt is not fully extended.

Based on the state of the art, this disadvantage is overcome by utilizing a second stronger spring whose task it is to return the lever handles-into the essentially horizontal rest position. Known door locks without locking devices and actuated by lever handles, consist basically of the following elements:: an elongated two-part housing with the division plane of the parts extending vertically; a mounting plate having a bolt opening and mounting bores with at least one of the housing parts fixed to the plate at its front end; a bolt is guided in the bolt opening and can be displaced into the front end of the housing; an elongated U-shaped actuating member is slidably arranged in the housing and has a pair of elongated sides guided on the housing walls and a web extending across the front end of the sides adjacent the bolt; a bolt pin is secured at one end to the bolt and extends inwardly into the housing and through a bore or opening in the web of the actuating member, and a head is attached to the inner end of the bolt pin and rests against the web when the bolt is displaced out of the housing;; a first compression spring is fixed between the bolt and the web of the actuating member and laterally encircles the bolt pin with some play; a second compression spring is arranged coaxially with the first compression spring and is located inwardly of it within the housing and is located between the web of the actuating member and a spring abutment which connects the housing parts together and is positioned so that it does not interfere with the movement of the actuating member within the housing;; a rotary drive member or tumbler is rotatably supported in each of the housing parts and is positioned between the spring abutment and the rear end of the housing, the axis of rotation of the tumbler extends transversely across the housing through the plane of division between the housing parts, and the tumbler includes a radially outwardly extending actuating projection disposed in contacting engagement with catch members located on the actuating member; and the housing parts are rigidly interconnected when the lock is assembled.

These known door locks have the disadvantage that the actuating projection on the tumbler is in frictional contact with the catch members on the actuating member and leads to quick wear at the points of contact. Due to this wear, when lever handles are used they tend to be displaced from their normal horizontal rest position after a certain period of use. Moreover, such locks are hard to operate because of the high friction at the above mentioned contact points.

Known door locks actuated by lever handles and including a locking device for locking one side or the other of the door have the above-listed elements. In such a lock, however, the tumbLer consists of two parts with the plane of division of the parts coinciding with the plane of division of the housing. The two tumbler parts are supported so that they can be rotated relative to one another and each tumbler part is located in a corresponding housing part. Each tumbler part has a radially outwardly extending actuating projection.In addition to the elements listed above, this lock embodiment has the following elements: a locking element which can be locked in different positions includes an actuating projection which extends through one of the side walls of the housing, the locking member interacts with a locking member provided on the tumbler so that both of the tumbler parts can be rotated or one tumbler part can be locked against rotational movement; and an unlocking device displaceable with the actuating member releases the locking action effected on the locked tumbler part when the unlocked tumbler part is rotated.

This one-sided lockable door lock has the following features and disadvantages in addition to the disadvantages of the door lock mentioned above to which it corresponds except for the locking feature.

The locking member is constructed as an actuating pin extending through and guided by the spring abutment. With a radially attached locking projection, the actuating pin can engage a recess acting as a locking member in the actuating projection of one tumbler part. The locking action is canceled by a releasing pin fastened to the actuating pin opposite the locking projection. This releasing pin is surrounded by the second compression spring and is arranged obliquely relative to the plane of division of the housing and interacts with a conical bore in the head of the bolt pin. Since only half of the tumbler can be locked in this arrangement, the door lock can not be used optionally for doors which close to the right as well as those which close to the left.Further, in releasing the locking action, the conical bore in the head of the bolt pin must laterally move the actuating pin by means of the releasing pin against the locking force acting on the actuating pin. As a result, significant transverse forces act on the pin making it harder to move the lock and increasing its susceptibility to wear.

Therefore, the primary object of the present invention is to provide a door lock consisting of the above-mentioned elements and having the following properties.

at least reduced wear at the point of contact between the actuating projection on the tumbler and the catch members on the actuating member; ease of motion during operation; continuously returning the lever handles into an essentially horizontal rest position even after long periods of use and/or high frequency use; maintaining the full travel path of the bolt even after long periods of use and/or high frequency use; utilizing the essential parts of the lock for a door lock with or without the capability of locking the unit on one side; the capability of right-hand and left-hand use even when the completely assembled door lock includes a one-sided locking device; and in the embodiment including a locking device, it is possible to provide secure engagement of the locking member while also affording unlocking with an easy motion and assuring that the lock operates safety and with little wear.

In accordance with the present invention, a door lock without a locking device and having the above components, has the following features.

the actuating member is guided laterally by the side walls of the housing and the sides of the actuating member have oppositely arranged elongated slots so that the member can be displaced relative to the spring abutment and the tumbler; the catch member located on the actuating member are in the form of rollers extending between the actuating member sides and are rotatably supported in aligned bores with the axes of the rollers extending parallel to the axis of rotation of the tumbler; and the width of the actuating projection on the tumbler corresponds approximately to the dimension between the inner surfaces of the actuating member and approximately to the effective lengths or axial dimensions of the rollers.

Based on the above-indicated type of door lock with a locking device, the present invention has the following features: the sides of the actuating member are guided by the walls of the housing and the actuating member sides each have a slot affording movement of the actuating member relative to the spring abutment and the tumbler; the catch members are formed as rollers rotatably mounted in the actuating member, each roller extends between the sides of the actuating member and are rotatably supported in bores in each side, and the axes of the rollers extend parallel to the axis of rotation of the tumbler; the tumbler is formed in two parts with a radially projecting locking member arranged on each part and an outwardly extending actuating projection is located on each part opposite the locking member;; a locking element is provided in the housing between the tumbler and the rear end of the housing, the locking element has a locking recess for receiving the locking member of one of the tumbler parts, the locking elements is pivotally displaceable petween three stop positions about an axis extending perpendicularly to the axis of rotation of the tumbler with the axis extending vertically when the lock is in the assembled condition, in its middle position the locking element is located between the two locking members on the tumbler parts and in the other two positions it receives one or the other of the two locking members; and the unlocking device consists of two actuating cams each arranged opposite the other on the sides of the actuating member, when the actuating member is displaced one of the cams engages a part of the locking element and pivots the locking element into its neutral or middle position so that both of the tumbler parts are unlocked.

In the lock including the locking device, in accordance with the present invention, it is advantageous when the locking element has the shape of a rectangular plate supported on swivel bearing pins extending from opposite edges of the plate adjacent the end of the plate facing toward the rear end of the housing, these bearing pins are pivotally supported in recesses in the housing which are located in the dividing plane between the housing parts so that both of the housing parts cooperate in forming the recess or bore for the bearing pins.

Preferably, the positioning member for the locking element extends through the locking recess of the locking element. A pin mounted in a bore in the rectangular plate pivotally supports the positioning element. The axis of the bores for the pins extends parallel to the vertical swivel bearing axis of the locking element. The bearing bore is interrupted by the locking recess. To provide two positioning parts, the positioning member extends outwardly from the housing on both sides through guide bores aligned opposite one another in the housing parts and the axis of the positioning member extends parallel to the axis of rotation of the tumbler.

In this door lock embodying the present invention and provided with a locking device, it is advantageous when two oppositely located surfaces on the locking element form obliquely arranged abutting surfaces which extend into the path of the cams on the actuating member when the locking element has one of the locking members located in its locking recess.

A further advantageous feature of the locking element is the arrangement of a stop spring and a stop ball in at least one of the bores receiving the pins of the positioning member so that the stop ball cooperates with stop bores in the housing for properly locating the locking element in its various stop positions.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

In the drawing: Fig. 1 is an exploded view of a door lock without a locking device embodying the present invention; Fig. 2 is an exploded view of a door lock with a locking device embodying the present invention; Fig. 3 is a plan view, partially broken away, of the door lock without a locking device; Fig. 4 is a sectional view taken along the line lV-IV in Fig. 3; Fig. 5 is a front view of the door lock; Fig. 6 is a plan view of the door lock with a locking device, similar to that shown in Fig. 3; Fig. 7 is a sectional view taken along the line VIl-VIl in Fig. 6; Fig. 8 is a side view of a one-half part of the housing; Fig. 9 is a sectional view taken along the line IX-IX of Fig. 8; Fig. 10 is a sectional view taken along the line X-Xin Fig. 8;; Fig. 11 is a plan view of the housing part shown in Figs. 8-10; Fig. 12 is an elevational view of a mounting plate; Fig. 13 is a section taken along the line Xl Il- XIII in Fig. 12; Fig. 14 is an elevational view of the rear side of the lock bolt; Fig. 1 5 is a plan view of the bolt; Fig. 1 6 is a side view of an actuating member; Fig. 1 7 is a plan view of the actuating member; Fig. 18 is a rear view of the actuating member; Fig. 19 is a side view of a tumbler used in the door lock without a locking device; Fig. 20 is a plan view of the tumbler shown in Fig. 19; Fig. 21 is a side view of a two-part tumbler for the door lock with a locking device; Fig. 22 is a plan view of the two parts of the two-part tumbler shown in Fig. 21 with the parts separated from one another;; Fig. 23 is a side view of a bolt pin; Fig. 24 is a plan view of a spring abutment; Fig. 25 is a front view of the spring abutment illustrated in Fig. 24; Fig. 26 is a side view of a connecting element for inter-connecting the housing parts; Fig. 27 is a side view of a catch member in the form of a roller; Fig. 28 is a side view of a locking element; Fig. 29 is a front side view of the locking element shown in Fig. 28; Fig. 30 is a plan view of the locking element shown in Figs. 28 and 29; Fig. 31 is a front elevational view of a cover plate for the mounting plate; and Fig. 32 is a sectional view taken along the line XXXll-XXXll in Fig. 31.

For an explanation of the general arrangement of the door lock without a locking device, reference is made to Figs. 1 and 3-5. The arrangement of the parts in the assembled state which is provided later on in this description, is based on the arrangement illustrated in Figs. 3 and 4. The housing 2 is formed of two identical elongated housing halves or parts 1 and has a rectangular cross-section. The dividing plane between the two housing parts 1 is indicated by the line 3 in Fig. 3. As viewed in Figs. 3 and 4, the front end of the housing is the left-hand end and the rear end of the housing is its right-hand end.

As will be described in detail later, the two housing halves or parts 1 are releasably fastened at the front end of the housing to the mounting plate 4. A slidably displaceable bolt 6 is guided within the housing 2 and extends through openings in the cover plate 5 and the mounting plate 4. When the lock is assembled and mounted in the door and the door is open, the cover plate 5 and the bolt 6 are the only parts of the lock visible from the outside. Cover plate 5 and bolt 6 are advantageously formed of a corrosion-resistant material, for example, brass. Cover plate 5 and mounting plate 4 can be rigidly interconnected in a manner which will be described below.

An elongated U--shaped actuating member 7 is located within and is movably guided by the housing 2 so that it fills the cross-section of the housing. Accordingly, the elongated sides 8 of the actuating member are arranged parallel to one another and to the side walls 9 of the housing with a small motion clearance existing between the inside surface of the side walls 9 and the outside surface of the sides 8. A similar small clearance is also present for the edge surfaces 11 of the sides 8 which face toward the upper and lower housing walls 10, note Fig. 4.

Within the housing, a bolt pin 12 is screwed at its front end into the bolt 6 and extends rearwardly through the housing and the web 1 3 of the actuating member, and a head 14 is attached to its rear end adjacent the web 13. In the closed position of the door lock illustrated in Figs. 3 and 4, the head 14 contacts the inner or rearwardly facing surface of the web 1 3. A first compression spring 1 5 extends between the bolt 6 and the web 13 of the actuating member 7 and the spring laterally encircles the bolt pin 1 3 with a certain amount of play, that is, the first compression spring 13 has initial tension. First compression spring 1 5 biases the bolt 6 out of the housing 2 until the head 14 contacts the web 13 in the closed position of the door lock.A second compression spring 1 6 which has a larger spring force than the first compression spring 1 5, is positioned between the web 13 and a spring abutment 17 which connects the two housing parts together and extends through the actuating member.

The second compression spring 16 biases the actuating member 7 toward the front end of the housing, that is toward the mounting plate 4, and in a manner to be described below, effects the return of the tumbler and also of the lever handles into the rest position.

Located between the spring abutment 17 and the rear end of the housing is a tumbler 18 rotatably supported in the two housing parts 1 with the axis of rotation of the tumbler extending perpendicularly through the dividing plane of the housing represented by the line 3. A flange-like actuating projection 19 extends radially outwardly from the side of the tumbler 1 8 facing toward the front end of the housing and the projection is in contacting engagement with the catch members 20 supported in the actuating member 7, the design and support of the catch members will be explained later. As mentioned above, the two housing parts 1 are held together by the mounting plate 4 at the front end of the housing and by the spring abutment 17 intermediate the ends of the housing.Moreover, at the rear end of the housing a connecting rivet 21 holds the two side walls 9 of the housing together, not Fig. 3.

In Figs. 2, 6 and 7 another embodiment of the invention is disclosed illustrating a door lock capable of being locked and many of its components correspond to the components of the embodiment just described. In this exbodiment, however, instead of a unitary tumbler, a two-part tumbler is provided with the dividing plane indicated by line 22 coinciding with the dividing plane of the housing shown by the line 3. Each of the two tumbler parts 23, 24 has an actuating projection 25 extending radially outwardly from the tumbler toward the front end of the housing.

Each of the tumbler parts 23, 24 can be rotated relative to the other. In Figs. 6 and 7 a squaresection bar 26 is shown in dashed lines connected to the tumbler part 24 for effecting its rotation. A door plate 27, which can also be in the form of a rosette, laterally encircles the bar 26, and a lever handle 28 is non-rotatably connected to the square section bar. On the opposite side of the lock as viewed in Fig. 6, corresponding parts may be arranged so that each of the tumbler parts 23, 24 is joined to a square-section bar, however, the bars are not connected so that the tumbler parts can be rotated independently of one another.

In this embodiment of the door lock there is provided a locking element 29 between the tumbler and the rear end of the housing. The design and operation of the locking element will be explained in detail below. By means of the locking element 29, one of the two tumbler parts 23 or 24 can be locked against rotation or, alternatively, both tumbler parts can be unlocked so that each is freely rotatable. In this latter case, the door can be opened from either side while the locked tumbler part cannot be rotated when the locking element is in locking position. Fig. 6 illustrates the positions of the lock components when both tumbler parts are unlocked. Locking element 29 can be adjustably displaced by a positioning member 30, note Fig. 6, which projects outwardly from both of the side walls 9 of the housing 2.Accordingly, the side for locking the door can be freely selected, that is, the door lock is suitable for right-handed and left-handed use. On the side of the door from which the lock is to be operated, a transmission member 31, shown in phantom lines in Fig. 7, is connected to the positioning member 30. An actuating knob 32 is rigidly connected to the transmission member 31 through a bolt 34 and is movably guided in a bore 33 of the door plate 27. The bore 33 is located vertically above the axis of the tumbler so that the door plate can be equally provided for right-handed or left-handed use.

in the following description, reference is made to the components of the door lock illustrated in Figs. 8 through 32.

In Figs. 8-11, only one housing half or part 1 is shown, both housing parts are identical in construction and dimension. The housing part 1 is formed of sheet metal and has a channel or C shaped cross-section. The housing part 1 includes a side wall 9 forming the web of the channel shaped section and two wall halves 35, 36 forming the legs of the section which are bent at right angles to the side wall. The wall halves 35, 36 each form one-half of the top and bottom walls of the housing. While these housing wall halves are essentially identical in construction, the wall half 35 has a recess 37 while the other wall half 36 has a corresponding projection 38, note Fig. 11.When the two housing parts 1 are joined together forming the housing 2, the upper and lower housing walls 10 each consist of one wall half 35 and one wall half 36 with the projection 38 on the wall half 36 interengaging the recess 37 on the wall half 35. This form locking engagement prevents the two housing parts 1 from moving relative to one another in the division plane of the housing, that is, in the elongated direction of the housing between its front and rear ends.

At its rear end, each housing part 1 has a rear wall half 39 extending from and disposed at a right angle to the side wall 9. This rear wall half 39 is best seen in Fig. 10. When the two housing parts 1 are interconnected, as described above, the two rear wall halves 39 are located next to one another and form a complete rear wall for the housing. As can be seen in Fig. 10, a projection 40 extends laterally from one edge of the rear wall half 39 and fits into a corresponding recess 41, note Fig. 8, in the other housing part 1. Since each rear wall half 39 engages the other housing part 1, the housing parts are secured at the rear end of the housing against any relative movements in the vertical direction in the dividing plane of the housing.At the front end of the housing part 1 in the middle of side wall 9, a bent portion 42 is provided which extends outwardly, note Fig. 11. The wall halves 35, 36 on each housing part 1 also have a forwardly projecting tongue 43. Bent portions 42 and tongues 43 connect the two housing parts 1 to the mounting plate 4, as is explained below.

Arranged one after the other in the longitudinal direction of the housing part 1 in its side wall 9 are three circular punched holes of different diameters. Starting from the hole closer to the front end of the housing, the first hole 44 serves to receive and hold the spring abutment 17, the second hole 45 supports the tumbler 1 8 or tumbler part 23 or 24, and the third hole 46 provides an opening through which the positioning member 30 extends. The second hole 45 is punched out of the side wall so that an outwardly projecting collar or sleeve 47 is formed, note Fig. 11. The collar serves as a bearing surface for the tumbler.Adjacent the rear end of the housing part 1 and symmetrical to the elongated axis of the housing part, two bores 48, with one of them always receiving a connecting rivet 21 for joining the housing parts together, are provided.

In the region of the second hole 45, the wall halves 35, 36 each have a cutout 49 aligned with one another. The cutouts permit the movement of the actuating member and the actuating projections 1 9 of the tumbler 1 8 or the actuating projections 25 of the tumbler parts 23, 24 in the elongated direction of the housing.

As can be seen in Figs. 8 and 11, immediately adjacent the ends of the cutouts 49 closer to the rear end of the housing, two small bores 50 are provided, though only half of one of the bores is formed by the wall half, that is, each wall half forms one and one-half of the bores. Accordingly, when the two housing parts 1 are joined together forming the housing 2, the top and bottom walls 10 formed by the wall halves 35, 36 provide three adjacent small bores 50 approximately equally spaced apart indicating the three stop positions of the locking element 29.Between the bores 50 which extend transversely across the top and bottom walls of the housing, and the rear end of the housing part 1, there is a half slot 51 in each of the wall halves 35, 36 so that when joined together the housing parts 1 form a bearing slot 51 in each of the upper and lower housing walls 10 into which the swivel bearing of the locking element 29 fits as will be explained below.

In Figs. 12 and 13 the mounting plate 4 is illustrated and it has the shape of an elongated rectangle with a circular indentation 52 centered in the plate. The indentation 52 forms a through opening 53 for the lock bolt 6 and the opening is rectangular in shape. The four corners of the opening 53 are indicated by the reference numeral 54. Recesses 55 are formed in two of the oppositely disposed sides of the opening 53 and these recesses receive the bent portions 42, note Figs. 8 and 11, of the housing part 1 when the housing 2 is interengaged with the mounting plate 4. When such engagement is effected, the tongues 43 of the housing parts 1 each engage in an oppositely arranged recess 56 in the other two sides of the opening 53. Accordingly, a rigid connection is provided between the housing 2 and the mounting plate.As a result of the indentation 52, the opening 53 with its recesses 55, 56 is inset relative to the front surface 57 of the mounting plate, so that the bent portions 42 of the housing parts 1 which fit into the recesses 55 do not obstruct the surface contact between the front surface 57 of the mounting plate and the rear surface of the cover plate 5, note Figs. 3 and 6. Two fastening bores 58 are formed through the mounting plate 4 on diametrically opposite sides of the opening 53 and these bores receive two corresponding rim holes 59 in the cover plate, note Figs. 31 and 32. The axial length of the rim holes 59 is such that when the cover plate is mounted on the mounting plate, which to some extent it overlaps, the rim holes pass through the fastening bores 58 and can be riveted against the rear surface of the mounting plate by a widening action.When the mounting plate 4 and the cover plate 5 are connected together the recesses around the opening 53 in the mounting plate are covered and the corresponding opening 60 in the cover plate 5 is sized to correspond to the crosssectional dimensions of the bolt 6 so that the bolt is guided on all of its sides by the opening 60. In Fig. 5 the dashed lines indicate the position of the mounting plate 4 behind the cover plate 5. The rim holes 59 in the cover plate form the fastening bores 61 for mounting the door lock in a door.

In Figs. 14 and 1 5 the bolt 6 is shown and it has a rectangular cross-section as indicated in Fig. 14. As can be seen in Fig.15, the rectangular cross-sectional shape is constant only for the rear third of the bolt length. The forward two-thirds of the bolt has a convex surface 62, note Figs. 3, 6 and 1 5, which facilitates the movement of the bolt 6 into the striker plate not shown, in the door sash. Side surfaces 63, 64 of the bolt are disposed parallel to one another and are guided by the side walls 9 of the housing 2, see Figs. 3, 6. Further, upper surface 65 and lower surface 66 of the bolt are also parallel to one another and the bolt 6 is guided by the edge surfaces of the opening 60 through the cover plate 6. A blind bore 68 extends into the bolt 6 from its rear surface 67 and the front end of the first compression spring 1 5 extends into the bore 68.

Extending further inwardly into the bolt from the bottom of the blind bore 68 is a threaded bore 69.

A threaded projection 70 on the front end of bolt pin, 12 note Fig. 23, extends into the threaded bore 69 in the bolt 6. The middle portion 71 of the bolt pin 12 is cylindrical and has a larger diameter than the projection 70. The rear end of the middle portion 71 supports a head 14 of a still larger diameter. A slot 72 is formed in the head 1 4 for receiving a screwdriver.

In Figs. 16-18 the actuating member 7 is shown and it is formed of sheet metal. As illustrated in Fig.17, the actuating member 7 is U-shaped with web 13 forming the bight of the Ushaped section and the sides 8 forming the legs of the section. Centrally arranged in web 13 is a bore 73 through which the bolt pin 12 extends from the forward part of the housing. The diameter of the bolt pin extending through the bore 73 is such that the bolt pin can move along its middle portion 71 through the bore.In each side 8 of the actuating member 7 there is a similarly shaped elongated slot consisting of three portions, a front portion 74 for movement relative to the spring abutment 17, a wider middle portion 75 for movement relative to the tumbler 1 8 or the tumbler parts 23, 24, and a rear end portion 76 for movement relative to the positioning member 30 of the locking element 29. Each slot is open at the rear end of the actuating member. The various portions in each side are aligned opposite one another. At about the mid-point of the middle slot 75 each side has a pair of outwardly directed extensions 77 which permit the formation of bearing bores 78 extending through the sides.

Catch members 20 in the form of rollers are freely rotatably supported in the bearing bores 78. The catch members, which extend between the sides 8, are illustrated in Fig. 27. Each catch member has a middle portion 79 in the form of a cylindrical roller with a lateral bearing projection 80 extending outwardly from each end of the middle portion. These bearing projections 80 engage in the bearing bores 78. When the door lock is operated, each catch member 20 on which the actuating projection 1 9 of the tumbler 1 8 or of the tumbler parts 23,24 act, rolls so that at this point of the motion transmission there is no sliding friction, rather a rolling friction which has a much more favorable effect on the easy motion operation of the lock.

In the forward part of the sides of the actuating member, between the web 13 and the front end of the front slot portion 74, the inner surfaces of the sides concentric with the axis of the bores 73 have cylindrically curved indentations 111 for receiving the front end of the second compression spring 16. Intermediate the upper extension 77 and the rear ends of the sides 8, two oppositely arranged inwardly directed cams 81 are provided.

A cam is formed in each side 8 and is pressed inwardly from the side. The cams 81 form part of the unlocking device for the locking element in the embodiment illustrated in Figs. 2, 6 and 7.

The function of the cams will be referred to later.

In the embodiment of the lock displayed in Figs. 1 and 3-5, no locking device is included, and the cams 81 on the actuating member 7 are not required, note Figs. 3 and 4, however, the cams do not form any obstruction. Accordingly, for each of the lock embodiments the same actuating member could be used. The same is true for the arrangement of the housing parts 1, which in the case of the lock embodiment without a locking device, does not require the small holes 50 and the half slots 51, note Figs. 8 and 11, however, the bores and slots do not obstruct the operation of the lock which does include a locking device.

Figs. 19 and 20 illustrate the tumbler 1 8 used in the lock embodiment displayed in Figs.1,3 and 4. The tumbler 1 8 includes a cylindrical portion 82 having a diameter so that there is little play within the bearing bores 45 and the associated collars 47 formed in the housing parts 1, note Figs. 8-11. Actuating projection 19 extends outwardly from the cylindrical portion 82 in a flange-like manner and has the shape of a circular ring sector. The surfaces 83 form rolling tracks for the catch members and are aligned approximately radially of the axis of rotation of the tumbler, that is, the surfaces 83 extend approximately radially of the axis of rotation.With respect to-the axis of rotation of the tumbler, the two surfaces 83 are spaced apart at an angle of approximately 450.

The tumbler 18 has a polygonal cutout 84 extending through the cylindrical portion 82 for receiving the square-section bar 26, note Fig. 6, in a form-locking manner. The bar 26 can be inserted into the tumbler at various angular positions. As Figs. 3 and 4 indicate, the lateral guidance of the tumbler within the lock is provided by the surfaces 85 of the actuating projection which extend between the radially extending surfaces 83. The side surfaces 85 are in juxtaposition to the inner surfaces of the sides 8 of the actuating member 7.In Figs. 21 and 22, a two-part tumbler is illustrated for use in the door lock disclosed in Figs. 2, 6 and 7 and the tumbler consists of two basically identical tumbler parts 23, 24. The difference between these two tumbler parts is that tumbler part 23 has a projection 86 concentric with the axis of rotation of the tumbler and extending axially toward the other tumbler part. The tumbler part 24 has a corresponding recess 87 into which the projection 86 fits. Projection 86 and recess 87 ensure that, when the tumbler is mounted in the lock tumbler, the two tumbler parts are rotatably supported so that each can rotate about the axis of rotation relative to the other.Each of the tumbler parts 23, 24 has an actuating projection 25 similar to the actuating projection 1 9 of the embodiment illustrated in Figs. 1 9 and 20. The arrangement of the actuating projections 25 corresponds to that of the actuating projection 19 on the tumbler 18.

Similar to the surfaces 85 of the unitary tumbler 1 8, the lateral guidance of the assembled tumbler 23, 24 mounted in the lock is provided by the side surface 88 of each of the projections 25. Each of the two tumbler portions 23, 24 has two radially extending surfaces 89 which form the rolling tracks for the catch members with one or the other of the surfaces becoming effective depending on the direction which the tumbler is rotated. The actuating projection 1 9 or the actuating projections 25 extend from the tumbler toward the front end of the housing.

Each tumbler part 23, 24 has a radially extending locking member 90 located diametrically opposite the locking projection 25.

As seen from the side, the locking member 90 has an approximately square shape. The locking members 90 interact with the locking element 29 as will be described later. When the two locking parts 23, 24 are assembled, a gap remains between the locking members 90. This gap forms the neutral position for the locking element 29, that is, the position in which both of the tumbler parts 23, 24 are unlocked.

In Figs. 24 and 25, the spring abutment 1 7 is illustrated having a cylindrical region 91 with an axial length corresponding to the dimension between the inside surfaces of the side walls 9 of the housing parts 1. Concentric to the middle cylindrical region 91 and extending axially outwardly from each end of this region is a riveting attachment 92 which supports the spring abutment 1 7 in the punched holes 44 of the housing parts 1, note Fig. 8. After insertion into the side walls, the riveting attachments 92 project outwardly from the outer surfaces of the side walls so that by riveting the spring abutment can be fixed to the housing. In the middle cylindrical region 91 of the spring abutment 1 7 a receiving space 93 is formed into which the rear end of the second compression spring 1 6 is fitted.In the limiting transverse surface 94 of the receiving space, a threaded bore 95 is provided into which a threaded projection 96 of a spring support pin 97 is tightly screwed. When the components of the lock are assembled, the spring support pin 97 extends into the rear end of the second compression spring 16.

For a detailed explanation of the manner in which the locking element 29 of the embodiment as shown in Figs. 2, 6 and 7 is locked, reference is made to Figs. 28-30. As is shown best in Fig.

28, the locking element 29 has the shape of a rectangular plate 98 from which coaxially arranged pivot bearing pins 100 extend along the oppositely located edges 99 which are immediately adjacent to the upper and lower walls 10 of the housing 2. These bearing pins 100 pivotally support the locking element in the bearing slots of the housing formed by the half slots 51 in each of the housing parts. As can be seen in Fig. 7, the pins 100 extend from the rearward end of the plate, and the side surfaces of the plate extend in the front end-rear end direction of the housing. On the edge of the locking element facing toward the tumbler parts 23, 24 there is a locking recess 101 formed in the plate 98 and it is shaped to receive one of the locking members 90 of the two-part tumbler 23, 24, note Figs. 21,22.Within the recess 101, inwardly from the forwardly facing edge of the plate 98, is the positioning member 30 extending transversely of the plate between the opposite side walls of the housing. The positioning member is constructed as a continuous threaded sleeve and has two pin attachments 102 extending at right angles to the axis of the positioning member 30. The pin attachments 102 are formed by a pin 103 which extends transversely through the positioning member 30. A bearing ore 104 extends through the plate 98 parallel to the swivel bearing axis defined by the bearing pins 100 and the bore is interrupted intermediate its ends by the locking recess 101. The pin attachments 102 fit into this bearing bore 104. The bearing bore 104 is spaced in the elongated direction of the housing forwardly of the axis of the bearing pins 100.As a result, the positioning member 30 is movably supported relative to the plate 98 and is movable through the inner region of the locking recess 101. The axial length of the actuating member 30 is such that it extends outwardly from both sides of the plate 98 and also extends through the punched holes 46 in the housing parts 1, note Fig. 8, forming outwardly extending projections, note the positioning member 30 as shown in Fig. 6. The positioning member 30 is axially guided by the holes 46 in the housing 2 and facilitates the pivotal movement of the locking element 29 interconnected to the positioning member by the pin attachments 102.

The axis of the swivel bearing pins 100 in the housing 2 allows the locking element 29 to be shifted in the elongated direction of the housing 2 within the bearing slots formed by the half slots 51.

The internal thread in the positioning member 30 allows the transmission member 31, Fig. 7 to be screwed into either one of the two ends of the positioning member. As a result, it is assured that the door lock embodying the present invention and incorporating the locking device, can be locked optionally from either side. Accordingly, the lock is suited for right-handed as well as lefthanded use. Small compression springs are arranged in the bearing bore 104 in the plate 98 on both sides of the pin attachments, note Figs.

28 and 29. These springs extend outwardly from the pin attachments toward the surfaces 99 of the plate 98. A locking ball 106 is supported on the outer end of each compression spring 105 and the spring biases the ball outwardly beyond the surfaces 99. To prevent the locking balls from being displaced out of the bearing bore 104, the bore can be made narrower at the surfaces 99, for example, by means of caulking after the pin 103, the springs 105 and the locking balls 106 have been inserted. Each locking ball 106 cooperates with three bores 50 in the top or bottom wall of the housing, note Figs. 8, 11. As a result of the engagement of the balls 106 in the bores 50, the locking element can be secured in the three dirrerent locking positions.

As shown in Figs. 28 and 30, the front portion of the plate 98 is reduced in thickness on both of its side surfaces in a step-like manner. The thickness of the forward strip 107 formed out of the plate 98 is interrupted by the locking recess 101 and is smaller than the space between the locking members 90 on the two tumbler parts 23, 24, see Fig. 22, so that the tumbler parts can be rotated as long as the locking members 90 are not engaged by the locking element 29. In the neutral or middle position of the locking element 29 with the balls 106 engaged in the bores 50 located on the dividing plane of the housing, the strip of the plate 98 is located between the two locking members of the tumbler parts 23, 24.

Stop surfaces 108 are provided on the opposite sides of the upper portion of the strip 107 and these surfaces extend outwardly from the surface of the strip. The stop surfaces 108 in combination with the actuating cams 81 on the actuating member 7, see Figs. 16, 17, provide the unlocking device. When the locking element is in one of its pivoted positions, that is, not in its neutral middle position, one of the stop surfaces 108 is located in the path of travel of a corresponding cam 81 on the actuating member 7. When the actuating member 7 moves rearwardly, the cam 81 contacts the stop surface 108. As a result of this contact, the engagement of the locking member 90 within the recess in the locking element 29 is canceled and the locking element is pivotally displaced back into its neutral position.

In its rearward portion, the plate 98 of the locking element 29 has a recess 109 formed inwardly from its rearward edge so that the connecting rivet 21 shown in Fig. 26, can pass through the space in which the locking element is located. The bottom of the recess 109 is curved and is aligned with one of the bores 48 in each of the housing parts 1, note Fig. 8. The connecting rivet 21, see Fig. 26, has riveting pin ends 110 which engage in the oppositely located bores 48 of the two housing parts and these pin ends are riveted to the housing parts. The curvature of the recess 109 ensures that the connecting pivot, while extending through the locking element 29, does not obstruct its pivotal movements.

The following is an explanation of the function of the two described lock embodiments as shown in Figs. 1-7. In the simpler arrangement of the door lock, shown in Figs. 1, 3 and 4, which does not include a locking device, by either an upward or downward turning of the lever handle 28, Fig.

6, there results a rotation of the square-section bar 26 and, thus, in a clockwise or counterclockwise rotation of the tumbler coupled to the square-section bar. When the tumbler is rotated, the actuating projection 19, depending on the direction of rotation, moves through an arc and takes with it the corresponding catch member 20 in engagement with its surface 83, Figs. 19, 20, leading in the direction of rotation of the tumbler. Starting from the locked position of the door lock shown in Figs. 3 and 4, the rotation of the tumbler and the contacting engagement of its actuating projection with the roller catch members 20, displaces the actuating member 7 through the housing toward its rear end.Since the distance between the axis of rotation of the tumbler and the center axis of the catch member 20 changes, a shift in the effective line of the application of force occurs between the catch member 20 and the surface 83 on the actuating projection 1 9 which is causing the displacement of the actuating member. Because the catch member can rotate in the manner of a roller, it rolls off the surface 83 so that practically no wear or friction losses can occur along the line of working engagement of these two components.

Therefore, the lock embodying the present invention is particularly low in friction and wear at this critical point of working engagement at which significant forces occur because of the biasing force of the second compression spring 16. These advantages are available even over long periods of use and/or with high frequency of use.

Rotation of the tumbler 1 8 continues in the selected direction until the head 14 of the bolt pin 12 contacts the spring abutment 17, that is, it contacts the spring support pin 97, note Figs. 24, 25. In this position, the bolt is completely retracted into the housing 2 due to its connection through the bolt pin 12 and the head 14 which contacts the web 13 of the actuating member.

Further, the second compression spring 16 is compressed to its smallest axial dimension. When the lever handle 28 is released, the second compression spring 16, as viewed in Figs. 3 and 4, displaces the actuating member 7 to the left and the effective catch member 20 through the corresponding actuating projection 19 rotates the tumbler back into its initial position in which the lever handle should be in its original horizontal rest position. When the door is slammed without turning either of the two lever handles, only the bolt 6 along with its bolt pin 12 moves to the right against the force of the first compression spring 1 5. After the bolt is aligned with the recess in the striker plate, not shown, the first compression spring biases the bolt out of the forward end of the housing into the recess.The door lock shown in Figs. 2, 6 and 7 includes both locking and unlocking features. By pressing the actuating abutment 32 inwardly, starting from the locked position of the lock and the illustrated neutral or unlocked middle position of the locking element 29, the lock cah be secured against opening from one side of the door by operating the button from the other side of the door. Via the transmission member 31, the inward movement of the button 32, results in a shift of the positioning member 30. Accordingly, the locking element is pivoted out of its neutral or middle position in the direction of movement of the positioning member and moves into one of its locking positions. In the arrangement shown in Fig. 6, the locking member 90, Fig. 22, of the tumbler part 23 is located within the locking recess 101 of the locking element. As a result, the tumbler part 23 is locked against rotation preventing the turning of the lever handle, not shown, connected to it. If the locking action is to be released, that is, the tumbler portion 23 unlocked, due to the unlocking device it is unnecessary to pull the actuating button 32 out of its pressed-in position. On the contrary, all that is necessary is to turn the lever handle 28 connected to the unlocked tumbler part 24 either upwardly or downwardly, as described above, so that the actuating member is moved toward the rear end of the housing.As the actuating member moves rearwardly, the actuating cam 81 located on the same side of the housing with the locked tumbler part 23 contacts the stop suface 108 on the locking element 29, Figs. 28, 30, located in its path and pivots the locking element back into the neutral position releasing the locking action with the locking member 90 on the tumbler part 23. The locking element is again held in position. It is also possible to operate the positioning member 30 from the other side of the lock. It is logical, however, to place the actuating button 32 including the transmission member 31 connected to the positioning member 30 on only one side of the door, otherwise the release of the locking action could be effected from both sides.The possibility of locating the actuating button 32 on either side of the lock, however, permits the use of the lock in all of the possible mounting arrangements. As explained above, the parts used in the embodiment with the locking device can also be utilized in the simpler lock embodiments without a locking or unlocking device. Moreover, the second embodiment just described can also be used in connection with door plates or rosettes which do not provide for a locking action. In such a situation, the locking element 29 is always maintained in its neutral position with both of the tumbler parts 23, 24 always unlocked. Further, in this arrangement, a single square-section bar can extend through both of the tumbler parts 23,24.

While specific embodiments of the invention have been shown and described in detail to illustrate the application of the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.

Claims

1. Door lock comprising an elongated housing having a front end and a rear end spaced apart in the elongated direction with walls extending between said ends and defining a passage, a mounting plate located at the front end of said housing and extending transversely of the elongated direction thereof, said mounting plate having an opening therethrough aligned with the passge in said housing, means on the front end of said housing for interengagement with said mounting plate, a bolt mounted in the opening in said mounting plate and displaceabie into the passage in said housing through the front end thereof, an elongated actuating member positioned within and slidably displaceable through the passage in said housing and having a pair of elongated sides disposed in laterally spaced relation and guided along said housing walls, a web inter-connecting said sides at the ends thereof closer to the front end of said housing and said web spaced inwardly from the front end of said housing, said web extending transversely of the elongated direction of said housing passage and having an opening therethrough, an elongated bolt pin secured to said bolt and extending therefrom into said housing passage toward the rear end of said housing, said bolt pin extending through the opening in said web, a head secured to the end of said bolt extending through said web and said head being in contact with said web when said bolt is displaced out of said housing, first spring means located between said bolt and said web for biasing said bolt out of said housing, a spring abutment secured within said housing between said web of said actuating member and the rear end of said housing with said spring abutment located in the range of said actuating member and said actuating member being movable relative to said spring abutment, second spring means located between said web and said spring abutment for biasing said actuating member toward the front end of said housing, a tumbler rotatably supported in said housing between said spring abutment and the rear end of said housing.

The axis of rotation of said tumbler extending transversely of the elongated direction of said housing, an actuating projection extending radially outwardly from said tumbler in the direction toward the front end of said housing, catch members positioned in said actuating member and disposed in engagement with said actuating projection, wherein the improvement comprises that said actuating member has an elongate slot in each of said sides thereof with said slot of said actuating member extending in the elongated direction of said housing so that said actuating member can be displaced relative to said spring abutment and tumbler, said actuating member having aligned bores in the opposite sides thereof, each said catch member comprises a roller rotatably mounted in a pair of aligned bores in said actuating member, the axis of said rollers extending in parallel relation with the axis of rotation of said tumbler, and said actuating projection having a width approximately equal to the dimension between the facing surfaces of said sides of said actuating member and to the effective length of said rollers forming said catch member.

2. Door lock comprising an elongated housing having a front end and a rear end spaced apart in the elongated direction with walls extending between said ends and defining a passage, a mounting plate located at the front end of said housing and extending transversely of the elongated direction thereof, said mounting plate having an opening therethrough aligned with the passage in said housing, means on the front end of said housing for interengagement with said mounting plate, a bolt mounted in the opening in said mounting plate and displaceable into the passage in said housing through the front end thereof, an elongated actuating member positioned within and slidably displaceable through the passage in said housing and having a pair of elongated sides disposed in laterally spaced relation and guided along said housing walls, a web interconnecting said sides at the ends thereof closer to the front end of said housing and said web spaced inwardly from the front end of said housing, said web extending transversely of the elongated direction of said housing passage and having an opening therethrough, an elongated bolt pin secured to said bolt and extending therefrom toward the rear end of said housing, said bolt pin extending through the opening in said web, a head secured to the end of said bolt extending through said web and said head being in contact with said web when said bolt is displaced out of said housing, first spring means located between said bolt and said web for biasing said bolt out of said housing, a spring abutment secured within said housing between said web of said actuating member and the rear end of said housing and being located in the range of said actuating member and said actuating member being movable relative to said spring abutment, second spring means located between said web and said spring abutment for biasing said actuating member toward the front end of said housing, a tumbler comprising two annular parts each interengageable with the other and located between said spring abutment and the rear end of said housing, each of said tumbler parts being rotatable relative to the other and to said housing, catch members mounted in said actuating member, each said tumbler part having a radially outwardly extending actuating projection disposed in contact engagement with said catch members, a locking element located in said housing passage between said tumbler and the rear end of said housing, a positioning member in engagement with said locking element and extending through at least one of said walls of said housing, said locking element being pivotally mounted in said housing, said actuating member including an unlocking device for releasing the locked engagement of said locking element when the unlocked one of said tumbler parts is rotated, an actuating projection extending radially outwardly from each said tumbler part in the direction toward the front end of said housing, catch members positioned in said actuating member and disposed in engagement with said actuating projections wherein the improvement comprises that said actuating member has an elongated slot in each of said sides thereof with said slots of said actuating member extending in the elongated direction of said housing so that said actuating member can be displaced relative to said spring abutment and tumbler, each said catch member comprises a roller rotatably mounted in a pair of aligned bores in said actuating member, the axes of said rollers extending in parallel relation with the axis of rotation of said tumbler parts, said actuating projections on said tumbler parts having a combined width approximately equal to the dimension between said facing surfaces of said sides of said actuating member and to the effective length of said rollers forming said catch members, each said tumbler part includes a locking member located on the opposite side of said tumbler part from said actuating projection thereon and said locking member extending radially outwardly from said tumbler part in the direction toward the rear end of said housing, said locking members being in the laterally spaced relation forming an open space therebetween, said locking element having a locking recess therein shaped to receive one of said locking members for locking said tumbler part connected to said locking member located in said locking recess, said locking element being pivotally displaceable about an axis spaced from and extending perpendicularly of the axis of rotation of said tumbler into a first stop position, a second stop position, and a third stop position with said locking element being spaced between said locking members in the second position in a neutral position and with said locking element receiving a different one of said locking members in said locking recess in each of said first and third positions for locking said tumbler part associated with said locking member located within said locking recess, said unlocking device comprises a pair of cams each located on an opposite side of said actuating member and projecting inwardly toward the other so that with said locking element in the first or third position one of said cams contacts said locking element and displaces said locking element into the neutral second position.

3. Door lock, as set forth in claims 1 or 2, wherein said housing comprises a pair of similarly shaped half housing parts each extending in the elongated direction of said housing from the first end to the rear end thereof so that the dividing plane between said housing parts extends in the elongated direction of said housing, and means for interconnecting said housing parts for forming the passage therethrough.

4. Door lock, as set forth in claim 3, wherein said housing parts are channel-shaped and said interconnecting means includes a recess and a projection in each of said housing parts located intermediate the ends thereof so that said projection on one said housing part fits into the recess on the other said housing part.

5. Door lock, as set forth in claims 1 or 2, wherein said sides and said web of said actuating member provide said actuating member with a Ushaped configuration.

6. Door lock, as set forth in claims 1 or 2, wherein said first spring means comprises a first helical compression spring encircling said bolt spring between said bolt and said web.

7. Door lock, as set forth in claim 6, wherein said second spring means comprises a second helical compression spring located on the opposite side of said web from and coaxial with said first compression spring.

8. Door lock, as set forth in claim 4, wherein connecting means on said housing parts are interengageable with said mounting plate for providing a rigid connection between said housing and said mounting plate.

9. Door lock, as set forth in claim 2, wherein the passage in said housing is rectangular in transverse section, said locking element is in the shape of a rectangular plate, said rectangular plate includes swivel bearing pins fitted into said housing in two opposite sides thereof for pivotally supporting said locking element, said rectangular plate having a pair of opposite surfaces extending in one direction between opposite sides of said housing passage and in the other direction in the elongated direction of said housing passage, said swivel bearing pins located in the edges of said rectangular plate extending in the elongated direction of said housing and adjacent to the edge extending between the opposite surfaces of said housing and closer to the rear end of said housing.

10. Door lock, as set forth in claims 2 or 9, wherein said positioning element extends through said locking recess spaced from said locking members on said tumbler parts so that said locking element can be pivoted between its different positions without interference from said positioning element, a bearing bore extending through said locking element parallel with and spaced from the pivot axis of said locking element and said bearing bore being intercepted by said locking recess, a pin located in said positioning member and extending transversely outwardly therefrom into said bearing bore for supporting said positioning member, opposite sides of said housing having positioning member guide bores therethrough, said positioning member extending through said guide bores and extending outwardly of said housing on at least one side thereof and the axis of said positioning member and of said guide bores being parallel to the pivot axis of said tumbler.

11. Door lock, as set forth in claim 10, wherein said bearing bore extends from said locking recess to at least one edge of said locking element extending in the elongated direction of said housing, an elongated stop spring located in said bearing bore and having one end bearing against said pin attached to said positioning member, and a stop ball located within said bearing bore and contacting the other end of said stop spring so that said stop spring biases said stop ball outwardly from said bearing bore, said bearing bore arranged to retain said stop ball therein while permitting said stop ball to project outwardly therefrom, and said housing having three stop bores therein each arranged to receive said stop ball in a different one of the first, second and third positions of said locking element.

12. Door lock, as set forth in claim 9, wherein each of the pair of opposite surfaces of said locking element adjacent the edge of said rectangular plate extending transversely of the elongated direction of said housing and located closer to the front end of said housing as an outwardly projecting abutting surface, and in each of the first and third positions of said locking element one of said abutting surfaces is located in the path of travel of one of said cams on said actuating member.

1 3. Door lock, as set forth in claim 4, wherein said housing having a pair of vertical walls and a pair of horizontal walls, each said channel-shaped housing part having a vertical web with a pair of legs each extending horizontaily from a different elongated edge of said web, said pair of legs of said housing parts forming said horizontal walls of said housing and the dividing plane of said housing parts extending vertically.

14. A door lock in any of the constructions described in the specification with reference to the drawings.