US2207827A

US2207827A - Lock

Info

Publication number: US2207827A
Authority: US
Inventors: Andrew L Schuyler; Allan R Maclagan
Original assignee: Western Electric Co Inc
Current assignee: AT&T Corp
Priority date: 1936-07-11
Filing date: 1937-11-11
Publication date: 1940-07-16
Anticipated expiration: 1957-07-16

Description

y 1940. A. L. SCHUYLER ET AL 7 LOCK Original Filed July 11, 1956 2 Sheets-Sheet 1 INVf/VTORS A. Asa/wan? A. RMACLAGAN a) a; 43 AZ'Z'Ofi/V'y July 16, 1940.

LOCK

Original Filed July 11 A. L. SCHUYLER El AL FIG 5 33 25 2 Sheets-Sheet 2 WW $32 57 f/fix \k \/-60 .59 63 Patented July 16, 1940 PATENT OFFICE LOCK Y AndrwL. Schuyler, La Grange, and Allan H.

' MacLagan, Western Springs, Ill., assignors to Western Electric Company, Incorporated,- New 'York, N. Y., a corporation of New York T Original application July 11, 1936, wa

. 90,076. Divided and this application November 11, 1937, Serial No. 173,964

' 1 Claim.

' This invention relates to looks, and more particularly to looks" for telephone pay station coin boxhousings, and is a division of ourco-pending application entitled Locks, Serialv No. 90,076,

filed J uly 11, 1936.; v v e It-is an objectof the present invention to provide a strong, practically=theft-proof lock'which may be economically manufactured.v

, In accordance with one embodiment of the invention, the closure member or door of atelephone pay station lower housingwhich encloses the coin box has a lock built therein, the outer portion of the door being formed to constitute a part of the lock case in which a plurality of latchin portions of. abolt are slidable- A back plate-which constitutesthe remainder of, the lock case is provided upon which the stationary ward, movable tumblers, key centeror barrel, bolt, and other operating parts of thelock may be mounted for assembly with the door. In the preferred embodiment of the invention, the stationary ward has a portion thereof cutaway to form'a straight surface against which the flat side of the key centeror barrel may abutto properly locate the key slot formed inthe lock center with respect'to the drawings, wherein Fig. 1 is a front elevational view of the lower housing of a telephone pay station adapted to enclose a coin box and having a combined door and lock mechanism formed in accordance with the present invention;

Fig. 2 is an enlarged vertical sectional view taken on the line 2-2 of Fig. 1 in the direction of the arrows;

Fig. 3 is an enlarged plan view of the bolt; Fig. 4 is a front view of the back plate with the operating'parts of the lock mounted thereon;

Fig. 5 is a View of the rear of the door with the out the several views, particular reference being had at this'time to Fig. 1, wherein there is 55 shown a lower housing ll having a coin return A betterunderstanding of the invention may be had try-reference to the following specification taken in conjunction with the accompanying slot 12 and a coin box opening or door jamb l3 in which a door .14 may be locked by means of alock designated generally by the numeral I5. As is usual in the art, the door when unlocked may be removed from the opening and a coin box ,-5 (not shown) withdrawn from the housing. An empty coin box is returned'towthe housing before the door is'r-eplaced. v I

The lower housing as shown in Fig. 2, is provided with a front l6 cut out to form the coin box 1 0 opening 13in which the door l4 fits somewhat snugly. The lower portion ll of the front I6 ,is provided with a rib l8 which forms a seat for the door 14. Formed integrally with the door I I, which is formed by dropforging or punching, is a 15 depending part 19 which cooperates with the rib I3 to hold the door in place when the door is locked. The door is also "provided with a thickened upper part which, in the forming operation, will assume the irregular configuration 20 shown in Figs. 2, 5, 6,7 and8 for receiving the operating parts ofthe lock which comprise a multi-head'lat'ch bolt 25, a key center or barrel 26, a plurality of movable tumblers 2'! and a fixed ward .28. Each of the movable tumblers .25 has a flat spring 29 fixed thereto which normally urges, the tumblers to rotate in a counterclockwise direc'tionK-Fig. 4) about apivot pin 30. The fixed ward 28 is positioned upon the pin 30 and a second pin 31 and, as implied by its name, does 30' not move about the pivot pin 30.

The bolt, as shown in Fig. 3, has three relatively

thick head portions

32, 33 and 34, and an irregularly shaped shank plate 35 to which the head portions are rigidly or integrally'connected. 35 The plate 35 is provided with a cam notch 36 adapted to cooperate with a camming. portion 31 of the key center or barrel when the key center or barrel is rotated to move the bolt into or out of latching position. Formed in the plate35 is 40 a slot 40 through which the pivot pin 30 will extend when the bolt is assembled in the look.

In the assembled lock the upper faces of the tumblers 21 project into thepath of an inverted U-shaped member 4 I, the vertical portions 4 of the U preventing retraction of the bolt unless the movable tumblers 21 be rotated by a proper key to move the upper faces of the tumblers out of the paths of the vertical portions of the U- shaped member, and to properly align slots 42 in the tumblers with the right hand vertical portion (Fig. 4) of the U-shaped member. This movement of the tumblers'may be brought about in the usual manner by the use of a properly designed key inserted through a slot 38 in a key center cap 39, and when the movable tumblers are brought into the proper alignment, the bolt will be retracted upon the further operation of the key to withdraw the bolt.

The head portion 33 of the bolt 25 issomewhat thinner than the

head portions

32 and 34, as clearly shown in Fig. 6, and when the bolt is in locking position, the portion 33 will engage a thickened part of the front l6, whereas the

bolts

32 and 34 will engage somewhat thinner.

parts of the front. I

In forging or punching the door M, a plurality of recesses are formed therein adapted to re-, ceive and enclose the operating parts of the lock and to constitute parts of the lock case. One of the recesses, as indicated at 50, is substantially rectangular in configuration, and receives the lock center and tumblers. This recess has an aperture 5| formed therein around whicha circular bearing depression 52 is formed for supporting the key center cap 39. The other recessed portions formed in the door are adapted to receive the various portions of the bolt, the

recesses

53, 54 and 55 serving as guides for the

head portions

34, 33 and 32, respectively, and a recess 56 slidably supporting the irregularly shaped plate 35. The ribs between the recesses, as indicated in Fig. 6 at 5T, 58, 59 and 60, are adapted to be engaged by a back plate 6| upon which all of the operating parts of the lock are assembled. The plate 6|, after the lock parts including the tumblers, bolt, key center and key center cap, and the pivot pin 30 and pin 3| are mounted thereupon, may be secured to the door by means of

machine screws

62 and 63, locating pins 64 and being formed on the door to properly position the back plate 61 thereon.

- It will be noted, by reference to Figs. 2 and '7, that the stationary ward 28 is interposed between the movable tumblers. This is done so that when a key not designed for the lock is inserted therein, the fixed ward will break the key.

and prevent the fraudulent opening-of the lock. In the present invention, the fixed ward 28 has been modified somewhat in order to serve a second purpose. This modification consists in forming the fixed ward with a rectangular cutout, as shown at 10, for cooperation with a'flat side H and a'slot 12 on the lock center 26 (see Fig. 9).

By milling the slot 12 in the manner shown in Fig. 9 and forming a rectangular cutout, as shown at 10, the stationary ward will serve as an abutment or stop against which the flat side H of the key center or barrel will strike when the bolt is in its extreme outward or looking position and in this manner the locked parts will is inserted in the look, no difiiculty will'be encountered due to' the key center or barrel being turned out of the proper position.

While the stationary ward 28 has been shown in the embodiment of the invention disclosed as positioned between the third and fourth tumblers from either the front or rear of the lock (Fig. 2), it will be understood that this ward might be positioned between any two movable tumblers, and it will also beunderstood that various other modifications of the lock structure and the configuration of the'door might be made without departing from the scope of the appended claim.

What is claimed is: In a telephone coin box housing having a door jamb, a door adapted to fit said door jamb a retractable bolt having a plurality of head portions rectangular in cross section slidable in said door and adapted to engage spaced portions of said door jamb to lock the door in the door jamb, a key center for projecting and retracting said bolt and having substantially cylindrical projections at its ends forming trunnions for rotatably supporting it, tumblers movable to permit saidbolt to be retracted, a fiat plate fixed to said door for supporting the bolt, tumblers and center, and a plurality oflribs formed in-- tegral with said door for cooperating with the flat plate to provide a lock case for enclosing the tumblers and key centerand to provide guides for said bolt, said door having a depression formed therein to provide abearing for one endv