US2100233A - Automatic chain lock - Google Patents

Description

Nov. 23, 1937. E. i=3 BEAUMONT AUTOMATIC CHAIN LOCK Filed Sept. 29, 1956 4 Sheets-Sheet l INVENTOR Faye/iii. 3240mm? I BY I ATTORNEY Nov. 23, 193 7.

E. P. BEAUMONT AUTOMATIC CHAIN LOCK Filed Sept. 29, 1956 4 Sheets-Sheet 2 INVENTOR [Faye/2e 1 Bmm/mf Nov, 23, 1937.

E. P. BEAUMONT 2, 00,233 AUTOMATIC CHAIN LOCK Filed Sept. 29, 1936 4 Sheets-Sheet 3 INVENTOR Ewe/re P. Beau/210x22 ATTORNEY 1937- E, P. BEAUMONT AUTOMATIC CHAIN LOCK Filed Sept. 29, 1936 4 SheetsSheet 4 INVENTOR Euyem R Beamnom BY ATTORNEY Patented Nov. 23, 1937 TATES PATET FFiiI 2,100,233 AUTOMATIC CHAIN LOCK Application September 29, 1936, Serial No. 103,099

18 Claims.

The present invention relates to looks, the components of which are permanently mounted on a door and its jamb, and more particularly to the type for effecting a chain connection.

5 An object of this invention is to provide a novel and improved lock for automatically effecting a chain connection between a door and its jamb,

and'for automatically removing such connection, by key controlled means operative from the outside surface of the door, and also from the inside.

Another object is to provide a novel and improved lock of the type described with a chainend conveying means which is normally immovable from its rest positions.

15 Still another object hereof is to provide in a lock of the character mentioned, a novel and improved means fcr preventing the free end of the chain from falling off the conveying means during the interval it is required to be associated with so such conveying means.

Another object of this invention is to provide a lock of the class set forth wherein the chain is automatically made taut when the connection as aforesaid is effected between a door and its jamb.

Another object hereof is to provide a lock of novel and improved construction for effecting a chain connection as aforesaid, wherein the free end of the chain cannot be removed from the keeper during the continuance of such connection,

399 except with the necessary key to undo such chain connection.

Still a further object of thisinvention is to provide in a look offering the aforementioned features, novel and improved means for actuating its various component and co-operative mechanisms in proper timed relation.

A further object hereof is to provide a novel and improved mechanism in looks generally, whereby the lock will remain inoperative although its cylinder is motivated by persons attempting to pick" the lock.

Other objects and advantages will become evident as the disclosure proceeds herein.

To accomplish these objects, I provide in an embodiment of my invention, a chain-end conveying arm which is rotatably mounted on the inside surface of the door, and adapted by a key-operative means actuated from the outside surface of the door, to be swung past a keeper on the jamb, which is provided with a crotch member to intercept and receive the free end of the chain from the conveying arm; the other end of the chain being permanently fixed on said arm. A lock means on the arm, holding the free end of the chainin 55 secure position on the conveying arm, is automatically opened upon entering the keeper, thereby releasing the free end of the chain to be intercepted by the crotch upon movement of the conveying arm from rest position. Thus, is a chain connection effected between the door and its jamb, with no possibility that the free end of the chain fall accidently from the arm, as may be the result of inertia or momentum, if said lock means were absent.

Upon upward movement of the conveying arm upon reverse operation of the key-actuated means, the free end of the chain resting in the crotch, is intercepted by said arm, while the lock means mentioned, is closed automatically before entirely emerging from the keeper. In this manner, the chain connection is undone, and the free end of the chain again secured to the conveying arm.

' Another locking means, which I include, to secure the conveying arm at its remote rest positions, is automatically opened to release said arm 5 for movement upon initial'turning movement of the key when the chain connection'is desired to be effected and when said connection is desired to be removed. Provision is also made to'automatically stretch the chain taut when the connection is effected across door and jamb, by having the opening in the crotch curved at the bottom thereof materially towards the axis of rotation of the conveying arm and away from the arcual path transversed by the free end of the chain while on said arm. When the chain connection is to be removed, spring means shift the free end of the chain to a position in said arcual path, during the early stage of upward movement of the conveying arm.

In a modification shown herein, I provide that the key-operative cylinder is normally independent of the lock proper, so that by a suitable key, the lock is operative by a person inside the room. Also, with a specially designed key, the cylinder operative from theoutside surface of the door, becomes mechanically related to the lock mechanism proper, by a clutch means motivated by said key, whereby the lock is operative from the out- 4 side.

This invention is capable of numerous forms and various applications without departing from the essential features herein disclosed. It is therefore intended and desired that the embodimerits shown herein be deemed illustrative and not restrictive, and that the patent shall cover whatever features of patentable novelty exist in the invention disclosed; reference being had to the appended claims rather than to the specific description herein to indicate the scope of the invention.

In the accompanying drawings, forming part of this application, similar characters of reference indicate corresponding parts in all the views.

Fig. 1 shows a front view of that part of my lock which includes the conveying arm.

Fig. 2 is a side view thereof, shown mounted on a door and associated with key-operative mechanism.

Fig. 3 is a perspective view of the chain and end links used in this device.

Fig. 4 is a perspective of the crotch member, which serves as the keeper of the free end of the chain during the continuance of the chain connection between the door and its jamb.

Fig. 5 is a perspective view showing the frame in which the crotch member is permanently mounted. This frame is secured on the jamb.

Fig. ,6 is a front View of the locking means carried on the conveying arm, for securely holding the free end of the chain on said arm.

Fig. 7 is a side view of said locking means.

Fig. 8 is a section taken at line 8--8 in Fig. 6.

Fig. 9 is a diagrammatic representation showing an embodiment of a lock constructed in accordance with the teachings of this invention, as appearing while the door is unlocked, meaning, free of a chain connection.

Fig. 10 is a similar view showing a chain connection between the door and jamb as accomplished with my present invention.

Fig. 11 is a diagrammatic representation showing the ultimate positions of the locking device employed to hold the free end of the chain on the conveying arm, and the means used to operate said locking device upon movement of the said arm.

Fig. 12 is a rear view of a fragment of the conveying arm, showing a casing structure for housing various actuating mechanism hereafter described.

Fig. 13 is a section through the keeper taken at line l3-l3 in Fig. 10.

Fig. 14 is a section through the casing per se, taken at line 14-14 in Fig. 9.

Fig. 15 is a section through the casing taken at line I5-l5 in Fig. 9.

Fig. 16 shows a member used for journalling the casing end of the conveying arm with respect to a base plate.

Fig. 1? shows such a plate.

Fig. 18 is a fragmentary section showing the manner of assembly of such journal construction.

Fig. 19 shows a friction spring included in said assembly.

Fig. 20 is a fragmentary diagrammatic representation of the mechanism within the casing used to maintain the conveying arm fixed at its respective rest positions.

Fig. 21 is a like representation, showing the conveying arm unlocked and free for movement about the axis on which it is mounted.

Fig. 22 shows the shaft included in such mechanism.

Fig. 23 is an end view of said shaft.

Fig. 24 is a front view of the member carrying a bolt for locking the conveying arm in fixed position.

Fig. 25 is a plan view thereof.

Fig. 26 is an end view thereof.

Fig. 27 is a section through a means used to cluded.

Fig. 32 shows the same with the clutch means in engaged position, due to the insertion of a proper key.

Fig. 33 is a fragmentary View of the front of the casing of Fig. 31.

Fig. 34 shows a key used for operating the lock from the inside surface of the door.

Fig. 35 shows the shaft used in the embodiment of Fig. 31.

36 shows the key used for actuating the cylinder and shifting the clutch mechanism.

Fig. 3'7 is an exploded view showing the components of the clutch mechanism and the keyoperative cylinder on which they are mounted.

In the drawings, the chain conveying arm designated generally by the numeral it), comprises a strap M, integral and terminating at one end in an inverted cup or casing 52, and at the other end in a pair of spaced plate elements 43, which are parallel to the flanged rim 44 of said casing. Each of these plate elements 43, is bifurcated hook-like to form crotches having the respective openings 45, directly opposite one another. Between said crotches or hooks so formed, in the respective enlarged circular portions 46 of their openings 35, is freely journalled the member generally indicated by the numeral il, which serves as a means to lock or securethe free end %8 of the chain 49, to the conveying arm MB. This journalled member 5?, consists of a pair of outwardly flanged discs 5%, secured respectively at the sides of an arcuate spacer element 5!, extending around about half their periphery; each of said discs being provided with openings 52, to receive the ends of the cross pin 53, of the bar link 54 which constitutes the free end 48 of the chain 49. On the periphery of the spacer element 5!, are a pair of outwardly extending stop pins 55 and 56, and the tooth 51, all spaced from one another. A blade spring 58, secured by a screw 59 onto the conveying arm 40, between the plates 43, has an inward finger 60, which presses against the spacer element 5|, to cause a drag; said finger lying between the pins 55 and 56, to limit the range of axial rotational movement of the lock means 47. The bar link GI, which is at the other end of the chain 49, lies through slot 62 in the wall of the casing 42, and is permanently pivotally secured by a screw 53 onto boss 64 within, and which is integral with the casing.

It is evident that the end 48, of the chain 49, is free to be removed from the conveying arm 30, when the respective sets of openings 52 and 45 are in alignment, and is secured or locked to the arm, when said openings are out of alignment. In the former instance, the set up is that of an open hook, while in the latter, that of a closed. eye.

The flanged rim 44 of the casing 52, sits free within an internal annular channel formed by the superimposed members 65 and 66, which are secured together by screws 61, to form the unitary structure illustrated in Fig. 1, and are provided with the holes '68, for mounting same by screws 69, onto the inside surface of a door 10. Member 65 is a stepped dished base, having a central opening '65 for the mounting of the shaft numbered 1!, which is a multi-shouldered headed pin, provided with a non-circular socket 12,.in its headed end, for the reception therein of the rectangular-sectioned shank 13, a component of an ordinary key-operated tumbler mechanism designated by the numeral 14, which is common in present day look manufacture, adapted to turn longitudinally upon turning the key 15, and immovable when said key is withdrawn from the mechanism. Member 66 is a ring having an inward flange 16 at one end, and the segmental flange 11, which segments conform to the outline of the base member 95. A split, multi-lateral narrow blade spring 18, lies free along the circular edge of the flange 44, to offer resistance against the action of gravity on the conveying arm 49.

A pair of pins 19 and 89, extend within the casing 42 from the boss 64, and are positioned in the path described by the pin BI extending from the tooth 92 of cam 83, secured on the shaft 1 I, on shoulder 84 thereof, so that the angular travel of pin 81, from the time it leaves contact with pin 19, until it comes into contact with the pin 80, is 180 degrees. The shank end 84' of 'the shaft 1|, sits free to rotate within socket 85in said boss 54.

A means is provided to prevent movement of the conveying arm 49 at various times, and consists of a bolt 89, extending outwardly from a side of. a rectangular frame numbered 87, which is provided with a pair of opposite upwardly extending cam engagement elements 88 and 89, one of which is at the bolt 86. On a side of said frame between said elements 89 and 89, is an outwardly extending tooth 99. This frame 81, is positioned about the hub 9|, of the cam 83, and is free to slide on the surface of platform 92 of the base 65, with bolt 89 within and beyond slot 93, in post 94, secured on the base 65 within the casing 42, so that when said frame 81, is fully shifted to one side of its possible line of travel, the bolt 86 will pass into slot 95 in the wall of the casing 42, and'when said frame is shifted to the other of its remote positions, said bolt 89 will move out of said slot 95, thereby unlocking the arm 49, so that it is free to move with respect to the base 65. The elements 88 and 89, are in the path of the tooth 82 of the cam 83, and it is to be noted that the width of the opening 96 in the frame 81, equals the diameter of the cam hub 9|, while the length of said opening exceeds such dimension by at least the throw of the cam tooth 82.

To accelerate movement of said frame 91, a hollow conical-pointed pin 91, which contacts the frame tooth 99, extends from and is free to slide in socket 98 of the post 99, fixed to the base 65, against action of the compression spring I99 in said socket. This mechanism hastens movement of the bolt 86, into and out of the casing slots 95 and NH which slots are diametrically opposite one another in the wall of the casing 42.

The keeper designated generally by the numeral I92, is adapted to be mounted on the jamb I93, and consists of a bracket member I04, which holds the chain-end receiving member indicated as I05. This latter, is a U-structure having opposite openings I06, for receiving the ends of the cross pin 53, and the space between the crotches I01 and I08 so formed, is sufficient to admit the free end of the conveying arm 49 therethrough. Upon assembly of members I94 and I05, chambers I09 are formed, within which reside the ejector springs H0, each of which is mounted on its respective pin I I I, extending from the member I05; an arm of each of said springs resting against the wall H2, and the other arm against the stop pin H3, in their respective chambers I99. This latter arm H is free to be moved away from its stop pin H3 by the cross pin 53, against which said spring is adapted to act.

A headed pin H4, is loosely slidably mounted in the bore H5, with its shank projecting within the member I between the crotches I01 and I98, and is so maintained by a leaf spring H6 secured at one of its ends by a screw H! to said member I95 as shown in Fig. 4. The components of the lock mounted on the door and jamb as illustrated in Fig. 9, are in such relative position that this pin H4, lies in the path of the tooth 51, and is employed to trip same to axially shift the lock member 41, into open and closed positions, depending upon the direction of movement of the conveying arm 40, as will be hereafter further explained.

The open end portion of each of crotch openings I98, is along the circular path transversed by the ends of the cross pin 53, while the closed lower portion I96 of each of said openings are of small radius and extend towards the door 10.

The lock component mounted on door 10, as shown in Fig. 9, is positioned so that the conveying arm 40, is in locked condition vertically upwards, at which time, said door is unlocked, and the mechanism enclosed in the casing 42, is in assembled relationship as illustrated in Fig. 20. Also at this time, the cross pin 53 of the chain 49, lies locked in member 41, whose openings 52 are out of alignment with respect to the crotch openings 45 respectively of the conveying arm 49, in which set up, the finger 69 of the spring 58, is against the stop pin 56, and the cam pin 8| lies in contact with and is directly above the pin 19. It is evident that upon movement of the conveying arm 49 about the axis on which it is mounted, the ends of the cross pin 53 will travel in a circular path, having such axis as the center thereof.

The keeper I92, is mounted on the jamb I93, in the manner as previously explained, namely, so that the open end portion of each of the crotch openings I 99, is along the aforesaid circular path, while the closed lower portion I96 of each of these crotch openings, extends towards the door, that is, said keeper I92, is so fixed in position that when the conveying arm 49, is at rest and locked in downward vertical position, the ends of cross pin 53 shall be at the bottom end of I06. To enable said portion I99 of the crotch openings in the keeper to be of substantial length in extension towards the door and away from the locus of travel of the ends of said cross pin 53, the point of attachment of the fixed end of the chain 49, meaning the position of the screw 63, is to the right of the vertical line of symmetry of the arm 40 in Fig. 9, so that said point shall be to the left of said line when the arm 49 is in downward vertical position as shown in Fig. 10. It is also to be noted that while arm 40 is as in Fig. 9, the movable arms of each of the ejector springs H0, will lie across the respective crotch openings Hi6, of the crot'ches I07 and IE8, and against the stop pins H3.

Commencing with the condition shown in Fig. 9, as explained, the operation of the device to effect the chain connection illustrated in Fig. 10, is as follows: I

Key '55, inserted in cylinder 74, is turned to rotate shaft ll, whereby cam pin 8! will move away from pin is, towards pin Bil. Before said shaft has made a half turn, tooth 82 of the cam 83, will contact frame element 88, thereby shifting the frameSi, whose tooth 96 will now urge pin 97] into its socket 98 compressing the spring I30. As soon as the apex of the tooth 59 passes a little beyond the apex of the pin 9'3, the compressed spring we will force said pin out of its socket 98, and with a quick motion will hastily shift the frame 8'I, to its other remote position as shown in Fig. 21, whereby bolt 86 is withdrawn from the casing slot 95, to free the conveying arm it for movement, before the pin 8i contacts pin at, when the shaft H has completed its first half turn, meaning 180 degrees of rotation. The position of arm 55 is still as illustrated in Fig. 9, however, the spring ill will keep it from move ment due to any action of gravity, and the related position of the various components of mechanism within the casing 42, is as repre- Sented in the Fig. 21.

During the entire second half turn of the shaft 7 i pin Si is in contact with pin 85, whereby the arm 49 will be rotated 180 degrees and assume a position as in Fig. 10. Referring to the diagrammatic showing of Fig. 11, when arm to, in its downward movement passes through the keeper IElZ, the ends of the pin 53, enter the crotch openings I06, and tooth coming into contact with the pin ll i, will cause axial movement of the member ll, whereby crotch openings 52 will come in alignment with the respective crotch openings 45, releasing the free end of the chain called The finger .38 of spring 58, is now up against the stop pin 55. Any further contact at this time between tooth El and pin 5 i l, will shift the latter against action of the spring l l6, but member M will have no further axial turning.

The free end it of the chain is thus deposited by the conveying arm it and intercepted by the keeper l 32, and said arm continues to move downward pulling the chain. :2-8 taut into Hit against the action of the spring arms H8. The chain connection between the door it! and its jamb its is thus effected, and before the conveying arm 48 aforesaid, has come to rest to its position shown in Fig. 10, the cam 83 has engaged the frame element 38, whereby the frame S'l is shifted towards its initiai position, and such movement is accelerated by action of the spring lt il as hereinabove explained, whereupon the bolt 85 will rule a little distance along the inner wall of the casing 42, and finally enter the casing slot I t l, to lock the conveying arm M! to the fixed base 65. Key E5 may now be withdrawn. Cam pin BI is now under pin es and in contact therewith, and it is to be noted that crotch openings 52 and 45 are in alignment, that is, in condition to receive the free end d8 of the chain upon restoring the conveying arm to its initial position of Fig. 9, winch will now be explained.

To remove the chain connection, key '55 is turned to rotate shaft 'II in the opposite direction than heretofore. During the entire first half turn, cam pin ill will move away from pin 5 3, towards pin is, and, action of the cam 813, will shift bolt 35 out of casing slot Idl, thereby releasing the conveying arm 48, for movement upwards through the keeper I92, and to its initial position as in Fig.9, which occurs during the second half turn of the shaft 'Il.

During this entire second half turn of the shaft II, pin 8! is in contact with pin I9, whereby the arm lil, will be rotated upwardly and will pass through the keeper I02, where the ends of the pin 53 will enter the crotch openings 45 and will enter the crotches 52 of the lock member ll. Tooth 5? thereafter comes into contact with the pin I M, to cause axial movement of the memher All, whereby the free end 48 of the chain becomes locked to the conveying arm 49, for the crotch openings 52 will be out of alignment with respect to their related crotch openings 45. AX- ial movement of said member ll will cease as soon as stop pin 56 is against the finger 60 of the drag spring 58. Any further contact between said tooth 5i and pin 5 Hi, will cause the latter to move against action of the blade spring H5. It is to be noted that at the commencement of the upward or return movement of the conveying arm 40, the tautness of the chain 59 was relieved, and the stressed springs Ilil' caused pin 53 to be shifted to lie within the upper part of the crotch openings Hi6, so as to be in the locus of travel for proper reception by and within the crotch openings 52 of the lock member ll. Before the conveying arm til had finally come to rest to its position illustrated in Fig. 9, the cam 83 had again acted so that bolt 86 was shifted to ultimately enter the casing slot 95. The chain connection has been undone, and the conveying arm is again locked in position to the fixed plate 65.

In the embodiment described, the key-operative cylinder means indicated generally by the numeral I l, is permanently mechanically related with the lock mechanism proper of Fig. l, for the shank i3 is in constant connection with the shaft II. The device is operable from the outside surface of the door only, and when the chain connection is effected as illustrated in Fig. 10, it is impossible for a person inside the room to remove the chain end 48 from its keeper I02.

To enable the device to be operated from both the outside and inside of a room, I provide a clutch means on a slightly changed cylinder mechanism, as shown in the last sheet of the drawings, so that the cylinder means indicated generally by the numeral M is normally wholly independent and without any physical connection with the lock mechanism proper of Fig. l. I remove the shank l3 of the ordinary cylinder means 14, and provide the key I5 which fits such cylinder mechanism, with a forward tab l I8, adapted to pass through and project outwardly from the shank slot M9 in the end plate #20 which turns with the cylinder. Within a cup I2I, having a flanged rim I22 the size of the plate I28, and a shank slot 23 in its bottom, is a headed shank I24 capable of slidable movement therein, carrying the coil spring 25 thereabout. The length of the shank l 24 is such that its end IM' lies within the slot 23. This cup IZI, with its related components as described, is secured to said end plate E26. When the key 15 is inserted in the cylinder mechanism 75', its tab H8, will enter the cup I2l, thereby pushing the headed shank I24 into the socket 72 of the shaft II, to establish mechanical connection with the lock mechanism of Fig. 1.

Upon withdrawal of the key 75, the spring I25, which had been compressed, will shift the headed shank I24 to its initial position, whereby the keyoperated cylinder means 14', and the lock mechanism of Fig. 1, are divorced, for said shank will withdraw from its connection with the shaft ll.

Such feature of separation is readily adaptable to all manner of locks employing the every-day cylinder means, and it is to be noted that such construction is desirable, for although some unauthorized person shall tamper with the cylinder and be successful in turning the cylinder rotor, yet the lock mechanism proper would not be operated.

The end of the shaft H, is slotted as at I26, to receive the tab 12! of the key I28, which is insertable through the bore I29 in the front surface of the casing 42, whereby the-lock may be operated from inside the room, provided of course mechanism to accomplish the purpose of that shown in Fig. 37, is included in the installation. Whether key I28 is used from the inside of the room, or key '35 from the outside surface of the door, the operation of the lock mechanism proper is identical with that heretofore set forth.

Having set forth my invention and how its teachings may be employed, I claim:

In a lock for a door and its jamb, the combination of, a chain secured at one end whereby it remains mounted on one of them, a pair of members, each adapted to admit and engage the free end of the chain, mounted on the door and jamb respectively, one fixed and the other pivoted; the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb, locking means adapted to removably engage the pivoted member to fix its position, and means actuated by said key-operative means to motivate said locking means to fix the position of the pivoted member after a chain connection has been effected or removed and to release said pivoted member at each commencement of operation of said key-operativemeans.

2. A device as in claim 1, including means to independently accelerate the release of the pivoted member from its locking means, a little after the commencement of operation of the keyoperative means.

3. In a lock for a door and its jamb, the combination of, a chain secured at one end whereby it remains mounted on one of them, a pair of members, each adapted to admit and engage the ,free end of the chain, mounted on the'door and jamb respectively, one fixed and the other pivoted; the free end ofthe chain being remov- .of the chain to said pivoted member, and means adapted to move said locking means to secure the free end of the chain to the pivoted member and to release same in proper timed relationship depending upon whether a chain connection is being made or undone between the door and jamb.

4. A device as in claim 3, including a locking means adapted to removably engage the pivoted member to fix its position, and means actuated by the key-operative means to move this last mentioned locking means to fix the position of the pivoted member after a chain connection has been effected or removed, and to release said pivoted member at each commencement of operaton of said key-operative means.

5. In a lock for a door and its jamb, the combination of, a chain secured at one end whereby it remains mounted on the door, a pair of members, each adapted to admit and engage the free end of the chain, one mounted pivotally on the door and the other fixed on the jamb; the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connectionbetween the door and jamb, locking means carried on the pivoted member adapted to secure the free end of the chain to said pivoted member, and means adapted to move said locking means to secure the free end of the chain to the pivoted member while a chain connection is being removed, and to release said free end of the chain from the pivoted member while a chain connection is being effected.

6. A device as in claim 5, including a locking means adapted to removably engage the pivoted member to fix its position, and means actuated by the key-operative means to move this last mentioned locking means to fix the position of the pivoted member after a chain connection has been effected or removed, and to release said pivoted member at each commencement of operation of said key-operative means.

7. Ina lock for a door and its jamb, the combination of, a chain secured at one end whereby it remains mounted on one of them, a pair oft members, each adapted to admit and engage the free end of the chain, mounted on the door and jamb respectively, one fixed and the other pivoted; the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member past the fixed member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb, a locking element provided with an extending tooth, movably mounted on the pivoted member, adapted to be shifted to secure the free end of the chain to said pivoted member, or to free said end thereon, and an element carried by the fixed member, adapted upon movement of the pivoted member past the fixed memher, to trip said tooth, thereby shifting said looking element on the pivoted member to secure the free end of the chain to the pivoted member and to release same in proper time relationship depending upon whether a chain connection is being made or undone between the door and jamb.

8. A device as in claim 7, including means mounted on the pivoted member, to control the movement of the locking element thereon.

9. In a lock for a door and its jamb, the combination of, a chain secured at one end whereby it remains mounted on the door, a pair of members, each adapted to admit and engage the free end of the chain, one mounted pivotally on the door and the other fixed on the jamb; the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member past the fixed member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb, a locking element provided with an extending tooth, movably mounted on the pivoted member, adapted to be shifted to secure the free end of the chain to said pivoted member, or to free said end thereon, and an element carried by the fixed member, adapted upon movement of the pivoted member past the fixed member, to trip said tooth, thereby shifting said locking element on the pivoted member to secure the free end of the chain to the pivoted member while a chain connection is being removed, and to release said free end of the chain from the pivoted member while a chain connection is being effected.

10. A device as in claim 9, including means mounted on the pivoted member, to control the movement of the locking element thereon.

11. In a lock for a door and its jamb, the combination of a chain, a pair of members, each adapted to admit and engage the free end of the chain, one mounted pivotally on the door and the other fixed on the jamb; one end of the chain being fixed to the pivoted member, and the free end of the chain being removably engaged in one 'of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb; the distance between the position of the point of attachment of the chain onto the pivoted member and the point of final engagement of the free end of the chain in the fixed member, being greater than the distance between the position of said point of attachment of the chain on the pivoted member and the point of initial engagement of the free end of the chain in the fixed member, whereby the chain is pulled taut upon movement of the pivoted member after a chain connection between the door and jamb has been effected, and loosened upon reverse movement of said pivoted member.

12-. In a lock for a door and its jamb, the combination of, a chain, a pair of members, each adapted to admit and engage the free end of the chain, one mounted pivotally on the door and the other fixed on the jamb; one end of the chain being movably mounted on the door, and the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member whereby the free end of the chain is conveyed to leave the said'member with which it is in engagement, and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb; the pivoted member, in its movement, being adapted to shift the position of the end of the chain which is permanently on the door, whereby the chain is pulled taut after a chain connection has been effected, and loosened upon reverse movement of the pivoted member.

13. In a lock for a door and its jamb, the combination of a chain, a pair of members, each having a crotch adapted to admit and engage the free end of the chain, one member mounted pivotally on the door and the other of said members fixed on the jamb; one end of the chain being fixed to the pivoted member, and the free end of the chain removably engaged in the crotch of one of said members; the entrance portion of the opening of the crotch on the jamb, lying in the circumference of the circle of the locus of travel of the vertex of the opening of the crotch of the pivoted member, and the vertex portion of the opening of the crotch on the jamb, lying within said circle off its circumference, a spring means on the fixed member adapted to be stressed upon movement of the free end of the chain toward the vertex in the crotch on the jamb upon the chain becoming taut, and adapted to shift the free end of the chain from the vertex portion into the entrance portion in the opening of said crotch on the jamb upon loosening of the chain, a key-operative means adapted to be actuated from the outside surface of the door for swinging the pivoted member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement, and to enter and become engaged by the other of said members to eiiect or remove a chain connection between the door and jamb; the distance between the position of the point of attachment of the chain on the pivoted member and the point of final engagement of the free end of the chain in the crotch of the fixed member, being greater than the distance between the position of said point of attachment of the chain on the pivoted member and the point of initial engagement of the free end of the chain in the crotch of the fixed member; whereby the chain is pulled taut and into the vertex portion of the opening of the crotch on the jamb, thereby stressing the spring means, upon movement of the pivoted member after a chain connection between door and jamb is effected, and loosened thereafter upon reverse movement of said pivoted member whereby the spring means will shift the free end of the chain from the vertex portion into the entrance portion of the opening of the crotch on the jamb to lie in the aforesaid locus of travel of the vertex of the crotch of the pivoted member.

14. In a lock for a door and its jamb, the combination of, a chain secured at one end to remain mounted on the door, a plate mounted on the door, an arm member pivotally mounted on the plate, a shaft journalled on the plate, a cam carried on the shaft, a keeper member mounted on the jamb; said arm member and keeper member being each adapted to admit and engage the free end of the chain; the free end of the chain being removably engaged in one of said mem-- bers, a key-operative means adapted to be actuated from the outside surface of the door for turning said shaft, locking means on the plate adapted to removably engage the arm member to fix its position, and means controlled by the.

cam to disengage the locking means from the arm member and swing said arm member, whereby the free end of the chain is conveyed to leave the said member with which it is in engagement and to enter the other of said members to effector remove a chain connection between the door and the jamb, and then look the arm to the plate again.

15. A device as in claim 14, including means to independently accelerate the release of the arm member from its locking means.

16. A device as in claim 14, including a friction means in contact with the arm member, adapted to oppose the action of gravity on said member.

17. In a lock for a door and its jamb, the combination of, a chain secured at one end to remain mounted on the door, a plate mounted on the door, an arm member pivotally mounted on the plate, provided with a pair of slots, a shaft journalled to the plate, a cam carried on the shaft, a keeper member mounted on the jamb; said arm member and keeper member being each adapted to admit and engage the free end of the chain; the free end of the chain being removably engaged in one of said members, a key-operative means adapted to be actuated from the outside surface of the door for turning said shaft, a lock bolt movably mounted on the plate extending into one of the slots to fix the position of the arm member, and means controlled by the cam to shift the bolt out of said slot in said arm member and to swing the arm member, whereby the free end of the chain is conveyed to leave the said member with which it is in engagement and to enter the other of said members to efiect or remove a chain connection between the door and the jamb, and then to shift the bolt into the other slot in the arm member.

18. In a lock for a door and its jamb, the combination of, a chain secured at one end to remain mounted on the door, an arm member mounted pivotally on the door, having an opening adapted to admit the free end of the chain, a cylindrical member journalled through the. arm, having an opening longitudinally thereof adapted to admit the free end of the chain from the opening in the arm; a tooth extending from the journalled member, a member mounted on the jamb, adapted to admit and engage the free end of the chain; the free end of the chain being removably engaged in either the journalled member or the member on the jamb, a key operative-means adapted to be actuated from the outside surface of the door for swinging the arm member whereby the free end of the chain is conveyed to leave the said member with which it is in engagement and to enter and become engaged by the other of said members to effect or remove a chain connection between the door and jamb and an element projecting from the member on the jamb, adapted to trip the tooth to rotatably shift the journalled member whereby the free 'end of the chain is either locked to the arm or made free to be released therefrom depending whether a chain connection is to be effected or to be removed.

EUGENE P. BEAUMONT.

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