US2143425A - Lock - Google Patents

Description

Jan. 10, 1939.

A. L. SCHUYLER ET AL I 43,425

LOCK

Filed July ll, 1956 2 Sheets-Sheet 1 IN l/ENTORS A. L Sam/n4 5/? A. R. MACZAGA/V ATTORNEY Jan.- 10, 1939. A, SCHUYLER 5 2,143,425

LOCK

Filed July 11, 1936 2 Sheets-Sheet 2 mm H Mn M m m WW4 7 msMw A5 L AA Patented Jan. 10, 1939 UNITED STATES Aren't orries Application July 11, 1936, Serial No. 90,076

2 .Claims.

This invention relates to looks, and more particularly to looks for telephone pay station coin box housings.

It is an object of the present invention to pro.- vide a strong practically theft-proof lock which may be economically manufactured.

In accordance with one embodiment of the invention, the closure member or door of a telephone pay station lower housing which 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 latching portions of a bolt are slidable. A back plate which constitutes the remainder of the lock case is provided upon which the stationary ward, movable tumblers, key center or barrel, bolt, and other operating parts of the lock may be mounted for assembly with the door. In the preferred embodiment of the invention, the stationary ward has a portion thereof cut away to form a straight surface against which the flat side of the key center or barrel may abut to properly locate the key slot formed in the lock center with respect to the door.

A better understanding of the invention may be had by reference to the following specification taken in conjunction with the accompanying 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 lock bolt therein, parts being broken away to show the bolt construction;

Figs. 6, '7 and 8 are sectional views taken on the lines 6-6, ll' and 88 of Fig. 5, respectively, in the direction of the arrows, and

Fig. 9 is an exploded View of part of the lock mechanism showing the key center or barrel and stationary ward.

Referring now to the drawings wherein like reference characters indicate like parts throughout the several views, particular reference being had at this time to Fig. 1, wherein there is shown a lower housing it having a coin return slot i2 and a, coin box opening or door jamb I3 in which a door M may be locked by means of a lock designated generally by the numeral 1-5. As is usual in the art, the door when unlocked may be removed from the opening and a coin box (not shown) withdrawn from the housing. An empty coin box is returned to the housing before the door is replaced.

The lower housingas shown in Fig. 2, is provided with a front It cut out to form the coin box opening 13 in which the door M fits somewhat snugly. The lower portion ll of the front It is provided with a rib l8 which forms a seat for the door it. Formed integrally with the door l5, which is formed by drop forging or punching, is a depending part l9 which cooperates with the rib iii 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 shown in Figs. 2, 5, 6, 7 and 8 for receiving the operating parts of the lock which comprise a multi-latch bolt 25, a key center or barrel 26, a plurality of movable tumblers 2'1 and a fixed ward 23. Each of the movable tumblers has a flat spring 2i) fixed thereto which normally urges the tumblers to rotate in a counterclockwise direction (Fig. 4) about a pivot pin 30. The fixed ward 28 is positioned upon the pin 38 and a second pin 3i and, as implied by its name, does not move about the pivot pin 30.

The bolt, as shown in Fig. 3, has three relatively thick head portions 32, 33 and 36, and an irregularly shaped shank plate 35 to which the head portions are rigidly or integrally connected. The plate 35 is provided with a cam notch 38 adapted to cooperate with a camming portion 3? 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 plate 35 is a slot ill through which the pivot pin 30 will extend when the bolt is assembled in the lock.

In the assembled lock the upper faces of the tumblers 2'! project into the path of an inverted lJ-shaped member 4!, the vertical portions of the U preventing retraction of the bolt unless the movable tumblers 27 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 $2 in the tumblers with the right hand vertical portion (Fig. l) 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 is somewhat thinner than the head portions 32 and 34, as clearly shown in Fig. 6, and when the bolt is in looking position, the portion 33 will engage a thickened part of the front 16, whereas the bolts 32 and 34 will engage somewhat thinner parts of the front.

In forging or punching the door l4, a plurality of recesses are formed therein adapted to receive and enclose the operating parts of the lock and to constitute parts of the lock case. One of these 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 which a 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 5?, 58, 59 and Bi], 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 33 and pin 3| are mounted thereupon, may be secured to the door by means of machine screws 62 and S3, locating pins 64 and being formed on the door to properly position the back plate 6! 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 fiat side H and a slot 12 on the lock center 26 (see Fig. 9). The center or barrel 26 may be rotated by the key in a clockwise direction (Figs. 1 and 4) in thebearing surface 52 and. the aperture in the plate BI to open the lock and when so moved, the fiat side H of the center will move away from the vertically disposed edge of the cutout l0. Approximately one-half revolution of the key is sufficient to open the look. When the lock is locked, the center is turned in a counter-clockwise direction until the portions 10 and H on the ward 28 and center 26, respectively, engage.

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 fiat 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 be properly centered so that when the proper key is inserted in the look, no dificulty 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 be understood 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 claims.

What is claimed is:

1. In a lock, a plurality of movable tumblers, a rotatable key center for receiving a proper key adapted to move said tumblers to a predetermined position upon the rotation of said key in the lock, said key center having straight sides extending below the center of rotation of the key center and having a slot in the edges of the. sides adjacent the center of rotation, a fixed ward having a portion adapted to pass through said slot upon rotation of the key center in one direction, and a straight portion formed on said fixed ward for cooperating with a side of said key center to position the center in the lock on reverse rotation thereof.

2. In a look, a rotatable key center having side portions extending below the center of rotation of the key center and provided with a slot in the edges of the sides adjacent the center of rotation, a plurality of movable tumblers adapted to be moved through predetermined distances upon a rotation of the proper key in the lock, and a fixed ward having a portion for preventing both the insertion and the operation of a key other than the proper key in the lock and a portion adapted to serve as a stop by abutting one side of the key center when the center is in its normal position.

ANDREW L. SCHUYLER. ALLAN R. MACLAGAN.

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