US2683367A - Latch construction for cylinder locks - Google Patents

Description

July 13, 1954 c. A. HILLGREN 2,683,367

LATCH CONSTRUCTION FOR CYLINDER LOCKS Filed Deo. 22, 1950 3 Shee ts-Sheet l r 7101,11' "if y l" T roe/VE ys.

July 13, 1954 c. A. HILLGREN 2,683,367

LATCH CONSTRUCTION FCR CYLINDER LoCxs Filed Dec. 22, 195o s sheets-sheet 2 @QL A. LIM/.695m

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T Uilm NM July 13, 1954 c.'A. HILLGREN 2,683,367

LATCH CONSTRUCTION FOR CYLINDER Locxs Filed Deo. 22, 1950 l 3 Sheets-Sheet 3 Chez. A. /LeeE/v,

JNVENToR. l

Patented July 13, 1954 LATCH CONSTRUCTION FOR CYLINDER LOCKS Carl A. Hillgren, Huntington Park, Calif.

Application December 22, 1950, Serial No. 202,177

(Cl. 'l0-216) 7 Claims.

The application relates to door hardware of a kind commonly designated as cylinder lock sets or cylinder latch sets. The construction herein involved is more particularly applicable to the manner of attaching a cylinder lock to a spindle accompanied by a quick and easy device or mechanism by means of which the knob and escutcheon plate containing the cylinder lock may be secured in position about the spindle and by utilization of a comparable means on another knob, whether or not including a privacy lock, cooperable in such fashion that theparts of the lock set are not only easy to install but also easy to separate and remove whenever occasion should require.

Although the design of lock sets of the cylinder type have been productive of a great variety of mechanisms directed to, among other things, improving the operation, economizing in the construction and otherwise rendering the device more eiiicient, progressive changes in the overall design of cylinder lock sets have prompted an ever increasing development in the association of the parts. Advantages and improvements developed in the past for certain constructions, while to some extent satisfactory for those constructions, have proved inadequate as other changes have taken place. Also the consuming public has become more insistent on the provision of more efcient lock sets necessitating a constant improvement in order to meet compet-itive conditions.

It is therefore among the objects of the invention to provide a new and improved lock set particularly Well adapted to cylinder locks Wherein the cylinder lock itself may be applied and secured in place more quickly and more ehiciently and also by means of a connection or attachment particularly rugged in its structure so as to maintain its eiiiciency during operation over long periods of time.

Another object of the invention is to provide a, new and improved door lock set wherein the cylinder lock may be attached to the spindle by what might readily be described as a iloating connection at least to the extent that friction is substantially minimized, thereby making the door easy to unlock with the proper key and the latch parts easy to rotate, construction also taking into consideration a ready and convenient means of permitting the position of the key hole slot to be reversed as conditions may require.

Still another object of the invention is to provide a cylinder lock set wherein the parts have been reduced in-number and simplified in their construction while at the same time building a more durable quality into the parts and also by so consti-.ucting the parts that both the escutcheon plate and handle may be snapped in place and there secured by spring pressed detents so arranged that the tension of the escutcheon plate and knob between detents cannot be disturbed from the locked side of the door.

The invention here involved is a continuation in part of co-pending application Serial No. 128,595, iiled November 21, 1949.

With these and other objects in View, the invention consists in the construction, arrangement and combination of the various parts of the device whereby the objects contemplated are attained, as hereinafter set forth, pointed out in the appended claims and illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a plan view of an assembled lock set in place in a door with the door shown in section.

Figure 2 is a horizontal sectional view of the door lock set in assembled position mounted in a door.

Figure 3 is a vertical cross-sectional view of the assembled lock set taken on the line 3-3 of Figure 2.

Figure 4 is a vertical cross-sectional view taken on the line 4-4 of Figure 2.

Figure 5 is a vertical cross-sectional View taken on the line 5-5 of Figure 2.

Figure 6 is a fragmentary view showing details of the detent arrangement for holding the knob and escutcheon plate in place.

Figure 7 is a fragmentary sectional view of the knob housing a privacy latch mechanism.

Figure 8 is an exploded view showing the proportion and relationship of parts prior to but positioned for assembly.

Figure 9 is a perspective View of one of the parts by which the knob is held in place.

Figure 10 is a perspective view of another of parts by which another of the knobs is held in place. y Figure 11 is an exploded perspective view showing the cylinder lock and adjacent end of the spindle prior to assembly from an angle opposite to the View of corresponding parts in Figure 8.

The problems involved in the manipulation of cylinder lock sets may be classed in two categories. One involves the actual manufacture of the lock sets at a cost which makes it possible to use them as readily as may be desired and another is involved in the engineering of the assembly of the parts not only from the point of view of factory assembly or sub-assembly but also from the point of view of mounting the lock sets in a door by carpenters or other construction mechanics in the manner which makes certain that they are installed quickly and efficiently so as to render ecient service over a long period of time. Since only portions of the mechanism involved in the locks sets constitute the inventions herein disclosed, the other operative parts of the lock set will be referred to by a general description, having in mind that those other parts are already known in the art either through .actual manufacture and use or as comprising parts of the subject matter of patents and patent applications, one of which has already been identified herein. The patent application of which this is a continuation in part reveals a lock set mechanism of the general description herein disclosed combining a latch housing of somewhat cylindrical form adapted to be slid into cooperative engagement with a cylinder lock set, the lock set in turn being provided with a privacy latch, details of which are disclosed in considerable particular in the pending application, and a cylinder lock housing of somewhat conventional overall construction mounted for operation with the spindle and the latch device actuated thereby.

The general construction of cylindrical door lock sets as suggested particularly in Figures l and 2 consists of a spindle housing lil containing a spindle il of some appropriate design at one end of which is a knob I2 housing a cylinder lock casing i3 and at the other end of which is a knob Ill here indicated as housing a privacy latch I5. Rosettes it and It are mounted in place to give a iinished appearance to the device when installed.

Extending transversely from the spindle housing is a latch housing I1 containing a latch mechanism, typical details of which are shown in copending application Serial No. 128,595. A latch I8 extends from the latch housing, operation of which is initiated by an actuator i8. These latch parts are designed to be mounted on a door 2U which has appropriate apertures formed therein for reception of the cylinder lock parts. The parts just described are also shown to good advantage in the exploded view, Figure 8.

To understand the assembly of the parts as depicted in Figures 2 through 7, inclusive, attention is rst directed to the exploded view, Figure 8, where all of the parts are illustrated individually and in perspective and in the axial relationship which those parts will have after being assembled together endwise into the operative position best illustrated in Figure 2.

The spindle housing I is here illustrated as having a recess 25 extending through the spindle housing and through an escutcheon plate 26 which in this instance is integral with the spindle housing. The spindle housing is provided with threaded holes 2l in appropriate lugs 28 for the reception of bolts when the spindle housing is to be secured in the door. At one side of the spindle housing is an end opening aperture or recess defined by inwardly turned side edges 29 which are adapted to be received in recesses 38 in the latch housing Il. The assembled relationship of the latch housing with the spindle housing may be seen to good advantage in Figure 3.

The spindle indicated generally by the reference character I i is a somewhat composite device as shown in the present invention in that it mounts operative parts of a privacy latch, structural details and mode of operation of which are described in co-pending application Serial No. 128,595. For the purpose of the present description the spindle may be defined as constituting a cylindrical sleeve 3l having a cut-away portion 32 and within which a core 33 is adapted to slide and rotate a distance limited by operation of a set screw 3A in an oblique slot 35. A springpressed privacy lock element 35 is illustrated as being manipulatable by a handle 3l forming a part of the privacy latch previously indicated generally by the reference character I5.

The end of the spindle opposite from the handle 3'! is specially formed in that it is provided with what may be described as a bushing 38 crimped in place by bent-over sections 39 of the hollow cylinder 3l in which position the bushing may be pinned non-rotatably in place. In the bushing there is provided a transverse recess d8 which has an inwardly extending slot M, the width of which is made less than the width of the recess 40 by inwardly turned flanges 42 and 43. Further details of the bushing 38 vare shown in Figure l1.

rThe cylinder lock casing I3 shown both in Figures 8 and 11 to good advantage comprises a barrel-like portion i5 adapted to receive a cylinder d6 which contains a keyhole slot 4l'. The cylinder extends through the barrel-like portion so that an end 48 of the cylinder protrudes outwardly beyond the casing as indicated in both Figures 8 and 1l as well as in Figure 2. The end has oppositely disposed recesses t9 formed therein. These'recesses 45 are of such width to receive the inwardly turned flanges 42 and d3 of the bushing 38 at the end of the spindle. the structure described up to this point vit will become apparent that the bushing 33 is designed to enga-ge the end of the cylinder by reason of the overlapping of the lianges d2 and 43 with the walls of the recesses :19. The parts can be slid into engagement by lateral movement and once in engagement they cannot be pulled apart endwise and furthermore are anchored against rotation one with respect to the other. The axis of rotation of the spindle is the saine as'the axis of rotation of the cylinder 45.

To anchor the spindle Il in its proper position within the spindle housing there is provided an intermediate part serving several functions identified in a sleeve indicated generally by the reference character 512. The sleeve 58 has a substantially cylindrical portion 5I at the outside end in the illustration chosen somewhat larger in radius than a semi-cylindrical portion 52, the parts thereby forming a shoulder 53 therebetween. The cylindrical portion 5I in addition `to providing a slot 54 for reception of the spring-pressed lock element 35 has provided therein recesses 55, one of which is shown in Figure 8, the recess in each case being partially closed by inwardly turned edges 55 and 51. It will be noted that the recesses 55 are larger than the largest portion of the end 48 of the cylinder and moreover that the inwardly turned edges 56 and 51 are small enough so as to be able to slide within the recesses t9 of the end 48 of the cylinder. This allowance is necessary for assembly and disassembly purposes. It might also be noted in this connection that there is provided an offset portion 58 slightly less in thickness than the space between the inturned edges 56 and 51. The offset portion 58 may therefore fit between the inturned edges thereby to prevent rotation of the cylinder casing I3 once the parts are assembled.

In order to have the sleeve 5G properly secured within the spindle housing the sleeve is provided Fromv with a resilient tongue 30 shown to good advantage in Figure 9 as being on a side of the sleeve 5B opposite from the slot 54. The perspective View in Figure 9 shows the sleeve positioned in a direction reverse to the direction illustrated in Figure 8 which last position is the true relationship of the sleeve when engaging the other portions oi the device.

The tongue as illustrated is an integral portion of the sleeve and may be stamped from the wall of the cylindrical portion 5I While the sleeve is in unhardened condition. While'in that condition two projections may also be formed thereon, a projection 6l being located at the end of the tongue and adapted to engage the outer face of the escutcheon plate 25, and a projection 62 adapted to engage the knob. The tongue `lies within a cut-out portion 63 of the sleeve where it is free to move transversely to an extent limited by the spring of the tongue about its base 64 where it is joined to the sleeve.

There also appears on the cylindrical portion of the sleeve a protruding flange 65 forming a shoulder adapted to press against the inside of the escutcheon plate 26.

The knob I2 is provided with a neck 66 having an inside diameter adapted to slide freely over the exterior of the cylindrical portion 5I of the sleeve 5i'. The neck portion is provided with a hole Si slightly larger than the projection 62 and adapted to receive the projection thereby to anchor the knob to the sleeve against both rotation and endwise movement once assembled. g

For holding the opposite knob Il on the spindle there is provided a second sleeve indicated generally by the reference character 'ib shown in perspective view in Figure and shown also in the exploded view, Figure 8, in the relationship which the sleeve has to the other parts of the device prior to assembly.

The sleeve 'Ill as here shown has a substantially cylindrical portion ll at the end. which will extend outwardly into the knob in assembled position and a semi-cylindrical portion 12, of the same radius, at the opposite end. Protruding flanges 73, both of which are visible in Figure 8, extend outwardly along the circumference of the sleeve where the cylindrical portion is separated from the semi-cylindrical portion. The flange is designed to abut the inside surface of an escutcheon plate 'l when in assembled position. It will be noted that the cylindrical portion H has a longitudinally extending slit I5 which permits a certain circumferential flexing so that a smooth though snug t may be provided between an axial hole 'It in the escutcheon plate and the exterior of the cylindrical portion. n

The cylindrical portion has extending along one side a tongue 'il similar in most respects to the tongue 50 of the sleeve 50. On the tongue 'I7 are outwardly extending projections 'I8 and 19. The tongue il is also connected to the cylindrical portion 'Il at only one end S0 and lies Within a cut-out slot in the cylindrical portion. When assembled the projection 'lil lies adjacent the outside face of the escutcheon plate 'I4 cooperating with the flanges I3 to hold the escutcheon plate between them. The projection 'I9 is adap-ted to be received Within a hole SI in a neck 82 as best seen in Figure 2. By this means the knob I4 is locked releasably upon the cylindrical portion of the sleeve T.

When the parts are assembled at the factory for boxing'and shipment to the cabinet shop or building where the hardware is to be installed in a door, certain of the parts are assembled in what may be termed sub-assemblies. For example, all of the parts directly connected to the latch housing I'I are completely assembled but the latch housing l1 is left unassembled with relation to the other parts of the device. Two other subassemblies are usually made up, one comprising the knob l2, the spindle housing lli, within which are positioned the spindle II, sleeve 59 and cylinder casing I3, and the other comprising chiefly the knob I4 and sleeve 1D with attendant parts.

In the assembly of the parts accompanying the knob I2 it will be found that it is convenient first to insert the sleeve 56 into the spindle housing forcing it inwardly while in about the rotational position illustrated in Figure 8 until the shoulder 65 abuts an oppositely disposed shoulder El) on the inside face of the escutcheon plate 26 which is in actuality a part of the spindle housing. The abutment of these shoulders limits the movement of the sleeve into the escutcheon plate. Meanwhile the wall of the interior of the spindle housing will serve to depress the tongue 6B by pressing on the projections 5l and 52 which pressure will be released when the projection t! passes beyond the outside face of the escutcheon plate, in which position it will snap outwardly and lock the sleeve in position within the spindle housing. The rosette It may be snapped in place over the exterior of the escutcheon plate 26 either before or after insertion of the sleeve Eli therein.

The spindle I I may then be inserted within the sleeve 5E! by extending the end carrying the bushing 3e through the interior of the sleeve in a position such that the lock element 36 falls in line with a slot 93 of the spindle housing lo but is held in position in the slit between the shoulders S5. The spindle may be thus pushed through the spindle housing and escutcheon plate 26 far enough so that it lies within the cylindrical portion 5I of the sleeve 50 to have the recess 40 coincidey with the slots 55 of the sleeve 50. When thus positioned the cylinder casing I3 may be applied to the spindle by inserting the end 48 of the cylinder laterally through one of the slots 55 until it eng-ages with the bushing 38 on the spindle within the slot `dll. The recesses 49 of the end of the cylinder during this operation slidably receive the inturned edges l2 and e3 on the bushmg.

It will be readily apparent that the cylinder casing may be set in one position or another, one position being degrees to or directly opposite the other so that the keyhole slot may be turned upside down if desired. In one position or another of the cylinder casing I 3 with relation to the sleeve 50 the oiiset portion 58 is adapted to be drawn part-way into the slot 55 in which position it is held after the knob 62 has been applied so that the cylinder casing can no longer rotate. vAfter the cylinder casing has been thus applied the knob l2 is slid into place by sliding the neck 66 over the exterior surface or the cylindrical portion 5l asshown in Figure 2 wherein the projection 62 will iind its way into the hole S1 at the neck of the knob and there anchor the knob to the assembly.

y It may be noted that this sub-assembly of parts can be readily disassembled at any time except when the sub-asse1nb1y is installed in the door. To facilitate disassembly there is provided an access passage d which extends through the escutcheon plate 26 as viewed in Figure 2. The access passage is made big enough to accommo- 'acsasiev date the end of an ordinary screw ydriver by means of which the projection 'B'I lis depressed .a distance sucient to release the projection -60 from its position within the hole 61 of the knob. The knob can thus be removed. In this connection it may be noted that the knob I2 cannot be removed from the locked side of the door so long as the rosette is anchored in its position on the escutcheon plate 9.5. When the knob is removed the cylinder casing can then be slid laterally outwardly to remove the cylinder casing -either for replacement or to invert it to a new position for the keyhole slot.

To take apart the remaining portions of the sub-assembly the screw driver point may be again l inserted in the access hole and the `projection 6| pryed downwardly far enough so that it slips free of its engagement with the exterior of the escutcheon plate 25, thereby permitting the sleeve e to be withdrawn.

The sub-assembly lat the opposite end is more simple in that it consists only of the escutcheon plate lll, the decorative rosette I1, the knob 'I4 and the sleeve lll. To assemble these parts the sleeve 'I5 is slid through the hole 'IS of the escutcheon plate and a hole 95 of the rosette I1 which under ordinary circumstances is merely snapped into place so that it can be removed. The sleeve le is pushed through until the anges 'I3 abut the inside face of the escutcheon plate as shown in Figure 2. In this position the projection i8 will snap outwardly and engage the outside face of the escutcheon plate.

With the sleeve thus positioned vin assembled condition within the escutcheon plate and rosette, the knob Ill is applied to the sleeve `by sliding the neck 82 of the knob over the cylindrical portion ll of the sleeve until the projection 19 is received in a hole SI in the knob. It will be noted that contrary to the position of corresponding parts of the knob I2 the hole 96 on the knob I4 is exposed so that the knob can be released rom the cylinder from the sideof the door opposite the lock side of the door, thereby `to facilitate removal of the parts from the door.

When the sub-assembled `parts are to be applied to the door 2e, the customary holes are cut in the door, namely, a hole I inwardly from the edge of the door for accommodation of the latch housing Il', and a transverse hole IOI communieating with the hole Zell, the transverse hole being for the accommodation of the cylinder housing. The parts may-be attached by first insei-ting the latch housing l1 in place orienting it with respect to the recesses in the position shown in Figure 2, or in a position exactly the reverse, depending on which way the door is going to swing. Next the sub-assembly comprising the spindle housing lil and knob I2 together with the spindle is applied by extending the spindle and spindle housinginto the door from a side |632 so that it occupies the position shown in Figure 2 and also Figure l. During this vDortion of the installation the inwardly turnedside edges 29 of the spindle housing will slide in the recesses 3i! of the latch housing somewhat loosely to facilitate ready installation. Once in place the latch housing will be locked to the spindle housing. To anchor these two sub-assemblies in place the escutcheon plate lll carrying the sleeve le, but with the rosette I5 removed, is applied to the other side H13 in the-door 20 and bolts I, shown only in section in Figure 5, extend through `bolt holes M of the escutcheon 1plate 4 into threaded holes 21 previously indicated as hav-ing been `provided `in the spindle housing I il. Since `bo threscutcheon plates 26 and 'Ill overlie the corresponding surfaces of the door, the spindle housing and Vescutcheon plate lil will be drawn together and anchored fast. No amount of tightening will, however, disturb the cooperation of the latch housing I1 with the spindle' housing due to freedom of the latch housing to slide along its connection tothe spindle housing.

After `the-escutcheon plate and latch housing have been thus installed, the rosette I6 may be snapped into place `and the knob lli subsequently applied to the sleeve ld. A hole ille is adapted to 4receive the handle 3l at the corresponding end of the spindle. The spindle together with the cylinder casing I3 and cylinder will thus be centered with respect to the knobs, the cylinder I3 being received in a 'corresponding central hole |01 of the knob I2. After the parts are thus positioned, wood screws |03 may be installed to nally anchor the latch housing in its proper position.

By resorting :to the structure herein described there has been provided a construction readily adapted to cylinder lock sets which makes the lock sets particularly easy to assemble prior to shipment and Vto subsequently install as building hardware in a door. The connection between the cylinder casing and the spindle being a relatively loose Iit, makes what might be readily described as a floating connection between these two parts. Operation does not depend upon any frictional contact and at the same time the interlock of the cylinder and the spindle is depended upon entirely to prevent endwise movement between these two parts, thereby dispensing with all auxiliary attaching expediente.

Also by `providing sleeves having' spring pressed tongues as described, sub-assembly is greatly facilitated in that the parts need only he snapped into place. At the same time ie parts can be disassembled with equal facility by it necessary todo no more than depress the springpressed tongues. 'The same spring-pressed tongues perform a double function in that they also facilitate a snap attachment of the knobs releasable also, though only under appropriate circumstances, by depression of the tongues. The general application of the sub-assembled vparts to the door is further facilitated by the assembled relationship of the semi-cylindrical parts 52 and 'I2 of the respective sleeves 5! and 'I0 in that the semi-cylindrical part li is adapted `to receive nested within it the semi-cylindrical part'52 so that one is free to rotate independently of the other. The relationship of these parts just described is readily apparent in Figures 'Z and v3 and yit will be further appa-ren1L 'from this that the parts can be acconunodated to a door o'f greater thickness without impairing their vfunction Y or operation.

While l have herein shown and described my `invention in what I have conceived to be the most ypractical 4and preferred embodiment, it is recognized vthat departures may be made therefrom within the scope of my invention, which ris'not to be `limited to the details disclosed herein 'but is to be accorded the full scope o1 the claims :so as to Aembrace any and all equivalent devices.

Having described my invention, what l claim as rnew and desire to secure by Letters Patent is:

l. In .a cylinder lock set comprising a spindle housing, .a spindle extending therethrough and a knob the combination of a cylinder adapted to be mounted ywithin said knob having an outwardly open key slot at one end thereof and at an opposite end thereof having a spindle-engaging device, said spindle at one end adjacent the cylinder having a cylinder-engaging device, one of said devices including a transverse end opening slot with an inturned side edge, and the other of said devices including an undercut recess adapted to slidably receive said inturned side edge, a cylinder casing for the cylinder having a shoulder thereon, and a retaining sleeve adapted to secure the knob in rotatable position on the spindle housing, said retaining sleeve having means non-rotatably engageable with said shoulder and adapted thereby to restrict rotation of said cylinder casing relative to the sleeve.

2. In a cylinder lock set comprising a spindle housing, a spindle extending therethrough and a knob for the spindle the combination of a cylinder casing assembly adapted to be received within said knob having an outwardly open key slot at one end thereof and having at an opposite end thereof a rotating portion having a transversely disposed undercut recess means, said spindle having a portion at one end thereof adjacent the cylinder casing assembly having a transversely disposed open slot with an inturned f said one end of the spindle having oppositely disposed recesses adapted to accommodate said rotating portion of the cylinder casing assembly, mutually cooperating portions on said cylinder casing assembly and said sleeve adapted to restrict rotation of said cylinder casing assembly relative to the sleeve with the cylinger casing assembly in either upright or inverted position, and means for holding said lock set in a door.

3. In a cylinder lock set comprising a spindle housing, a spindle extending therethrough, a knob at each end of the spindle, an escutcheon plate adapted to engage the door and a latch housing extending transversely Afrom the spindle housing having a latch mechanism therein the combination of a cylinder casing assembly adapted to be received in one of said knobs having an outwardly open key slot at one end thereof and an opposite end thereof having opposite undercut recesses, an offset portion on said opposite end, said spindle at one end thereof adjacent the cylinder casing assembly having a transverse laterally opening slot with inturned longitudinal side edges loosely and slidably receivable in said undercut recesses in either upright or inverted position of the cylinder casing assen bly, a retaining sleeve surrounding said one end of the spindle having a portion thereof extending through the escutcheon plate and adapted to be secured to the knob, said sleeve having at the outer end thereof laterally oppositely disposed recesses adapted for alignment with the slot in the spindle and having inturned side edges adapted to accommodate said undercut recesses, either of said oppositely disposed recesses being adapted to accommodate said offset portion of the cylinder casing assembly and said offset portion being adapted' thereby to be positioned in either upright or inverted position, and means for Vholding said lock set in a door.

4; In a cylinder lock set comprising a spindle housing, a spindle mounted rotatably within and extending through the housing and a knob and escutchean plate on an end of the spindle having each an opening for reception of the spindle end, the combination of means for releasably holding the knob and escutcheon plate on the spindle comprising a sleeve surrounding the end of the spindle, said sleeve having an outward substantially cylindrical portion adapted to be received within the escutcheon plate and knob and having a shoulder engageable with the inside of the plate, an inner portion of the spindle adapted to be received within the spindle housing, a pair of resilient normally outwardly pressed detents in the wall of the cylindrical portion, one of said detents being adapted to be located outside of and to contain the escutcheon plate between said one detent and the shoulder, said knob having means adapted to be releasably engaged by the other detent.

5. In a cylinder lock set comprising a spindle housing, a spindle mounted rotatably within and extending through the housing, a knob and escutcheon plate on each end of the spindle each having openings for reception of the respective spindle end, the combination of means for releasably holding the knobs and escutcheon plates on the spindle comprising a sleeve for each end of the spindle, each said sleeve having an outward substantially cylindrical split portion adapted to be received within the respective escutcheon plate and knob and having a protruding flange engageable with the inside of the plate, an inner semicylindrical latch actuating portion of each spindle adapted to be received within the spindle housing adjacent to but movable rotatably and longitudinally with respect to the semi-cylindrical portion of the other spindle, an elongated resilient tongue forming part of the wall of the cylindrical portion, said tongue being secured at one end to the cylindrical portion, and a pair of outwardly eX- tending projections on the tongue, one of said projections being adapted to be positioned cutside and to contain the escutcheon plate between said one projection and the flange, said knob having a hole adapted to receive the other projection, and said spindle housing having a screw driver access passage communicating between the interior thereof and a point adjacent the tongue in one of said sleeves for releasing the tongue and sleeve from engagement with the respective knob and escutcheon plate.

6. In a cylinder lock set comprising a spindle housing, a spindle rotatably mounted within and extending through the housing and a knob and escutcheon plate on each end of the spindle the combination of releasable means for holding the knobs and escutcheon plates in assembled condition comprising a pair of sleeves having inner ends adapted to nest slidably and rotatably one with respect to the other, each sleeve having an outer portion adapted to t within the respective escutcheon plate and knob, a shoulder at the inner end of the sleeve adapted to engage the inside face of the escutcheon plate, and a pair of spring-pressed detents in the wall of the outer portion of each sleeve normally pressed transversely outwardly and adapted one to engage the outer face of the escutcheon plate when said shoulder is in engagement with the inside face of the escutcheon plate, and the other detent being adapted to engage the knob.

7. In a cylinder lock set comprising a spindle housing, a spindle extending therethrough, a hollow knob and escutcheon plate for each end of the spindle the combination of releasable means for holding the knobs and escutcheon plates in assembled condition comprising a pair of sleeves having inner semi-cylindrical ends of different diameters adapted to nest slidably-and rotatably 11 one within the other, an outer substantially cylindrical portion on each sleeve adapted to t within the respective escutcheon plate and knob, said cuter portion having a longitudinal slit on one side,` a shoulder at the inner end of the sleeve adapted to engage the inside face of the escutcheon plate, a resilient tongue forming part of the Wall of the cylindrical portion attached at the outer end of and extendingthroughout substantially the length of said cylindrical portion, said tongue being spring-pressed transversely outwardly, and projections on the tongue adapted one 12 to engage the outer face of the escutcheon pla-te and the other to engage the knob, said knob having a hole adapted to receive said other projection.

References Cited in the file of this patent v UNITED STATES PATENTS Number Name Date 1,971,580 schlage Aug. 28, 1934 2,007,350 Schlage July 9, 1935 2,542,117 Cerf Feb. 20, 1951

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