US1560914A

US1560914A - Door lock

Info

Publication number: US1560914A
Application number: US669536A
Authority: US
Inventors: Pressley A C Moore
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-10-19
Filing date: 1923-10-19
Publication date: 1925-11-10
Anticipated expiration: 1942-11-10

Description

1,560,914 P. A. C. MOORE DOOR LOCK Filed Oct. 19, 199,5 2 sheets-sheet 1 Nov. 10, 1925.

Nov. 10, 1925. 1,560,914

P. A. C. MOORE DOOR LOCK Filed Oct. 19, 1923 2 Sheets-Sheet 2 Patented Nov. 10, 1925.

. UNITED STATES PATENT OFFECE.

DOOR LOCK.

Application filed October 19, 1923, Serial Ila-669,536.

l'0 all whom may come-m:

Be it known that I, Pnnssnnv A. C.l\iiOORE, a citizen of the United States, res1d1ng at Los Angeles, in the county of Los Angeles and State of California, have invcntednew and useful Improvements in Door Locks, of which the following is a specification.

.My invention relates to combined locks and latches for doors, and a purpose ofmy invention is theprovision of a combined lock and latch which, aside from possessing the desirable qualities of structural simplicity and durability, employs only a single belt which, normally operates as a latch. and whichcan be locked in projected position to function as locking means for securing a door inclosed position.

'It is also a purpose of my invention to providea lock of the above described character in which the bolt is reversible to perunit the application of the lock to a door irrespective of the direction in which. the door swings. Although I haveherein shown and will describe only one form of combined latch and lock embodying my invention, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the-invention and the spirit and scope of the appended claims.'.

In the accompanying drawings," I

Fig. 1 is a view showing in side elevation and partly in section one form of combined latch and lock embodying my invention.

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig. .1;

Figs. 3 and 4: are fragmentary views showing in side elevation the locking mechanism for the bolt shownin Fig. 1, and two of the positions'which the mechanism is capable of occupying.

Fig. 5 is a sectional view taken line 5-5of Fig. 1.

Fig. 6 is an enlarged fragmentary view showing a portion of the locking mechanism with the securing arm removed.

' Fig. 7 is a view similar to Fig. 4-. showing another position which the mechanism is capable of occupying. 1 j

Fig. 8 is a horizontal sectional view taken onthe line- 8-8 of Fig. 1. f Similarref'erence characters refer to similar p'artsiii each of the several'views;

on the Referring specifically to the drawings; and .parti ularlytg the, any l l%i :2..}. l it to retracted position by a present embodiment, comprises a casing 15 including a removable cover (not shown) adapted to close the casing in the usual manner. The casing is provided at its. front edge with an opening in whichis adapted to slide a beveled head 16. of a combined locking and latching bolt 13, such bolt in cluding a bifurcated shank having arms 1? provided with flanges 18 which are recessed at a corresponding point to form pockets 19. Between the arms 17 a stud 20 is formed to receive one end of a coil expansible spring 21 arranged between the arms and having its opposite end engaged by a similar stud 22 formed on a projection secured to or cast integral with the casing 15. The project-ion 23 also serves as a guide for the arms 17 during the sliding movement of the bolt so that the head 16 can properly operate withinthe opening of the casing.

The bolt B is normally urged to the pro jected position shown in Fig. 1 by means of the spring 21, but is adapted to be moved curved arm 24 engaging within one of the pockets 19 and fixed to a spindle 25 which extends through the casing 15 and is provided with the usual knobs (not shown). In the normal position of the bolt B, the arm 2% engages a lug 26 formed interiorly of the casing whereby the arm serves to limit the outward movement of the bolt under the action of the spring 21.

When considering the structure so far described, the bolt-B functions as a latch bolt and when in projected position serves to releasably retain adoor in closed position. In order that the bolt B mayalso function as a means for locking a door in closed position,-key operated mechanism is provided for securing the bolt in projected position. This mechanism, in the present instance, comprises abolt 27 Fig. 6) which is mounted for. vertical sliding movement within the casing so as to be projected into the lower pocket 19 in effecting a locking of the bolt 13 in projected position, or retracted' therefrom so as to permit of the normal operation of the bolt.. Thebolt 27 is slotted at its lower end, as indicated at 28. to receive aguide lug 29 fixed, to the casing 15. A second guide lug 30 is fixed to the casing-so as to engage one edge of the bolt. A block 81 (Fig. 5,) iscast integral with. the casing 15, and cooperates with, the ha 29 aesis s dada 2 time ing vertical movement. A plate 32 is secured to the block 31 by means of a screw 33, as clearly shown in Fig. 5. and this plate is arranged to contact with one side of the bolt 27 with its free end projecting from the bolt for a purpose which will be hereinafter described. The bolt 27 is provided at one edge with a projection 34. adapted to be engaged by a head 35 oi a key the latter being extended through a key hole 37 formed in the casing 15 so that the head may engage the projection to move the bolt to locking or non-locking position.

For securing the bolt 27 in looking or non-locking position, I provide a securing arm 38 pivotally mounted at its lower end upon a pin 39 constituting an extension of the lug 29. The arm 38 is also provided with a'recess 40, the curvature of which is not as abrupt as that of the projection 34, so as to allow of the upward movement of the key head 35 in effecting a movement of the bolt 27. The arm 38 is also formed with a U-shaped slot H in which works a pin 5L2 fixed to the bolt 27. A spring 43 secured. to a post a l engages one edge of the arm 38 so as to normally urge the arm to the vertical. position shown in Fig. 1.

In practice, the bolt 27 norn'ially occupies non-locking position wherein the bolt B functions as a latch bolt and may be moved to retracted position through operation of the arm. 24.. In the non-locking position of the bolt 27. the pin 42 is disposed within the lower horizontal portion of the slot LI so that upward movement of the bolt 27 to locking position cannot be effected witln out first swinging the arm 38 from the position shown in Fig. 1 to that shown in Fig. 3. In order to efi'ectsuch movement of the arm 38, the key head 35 is rotated in the direction of the arrow in Fig. 1 so as to first engage the edge of the arm 38 at a. point below the recess 40, thereby swinging the arin against the action of the spring 43 so that the pin 42 is disposed within the. vertical portion of the slot H, as clearly shown in Fig. 3.. Continued movement of'the head 35' causes the latter to engage the projection 34 of the bolt 27, thereby lifting the latter so. that its upper end is disposed within the lower pocket 19 and thereby efiecting a locking of e bol B p j ted p r 1-v As e bolt 27 reaches its uppermost position, the pin 42 moves to the upper end of the. slot 41 when the spring 43'functions to return the arm 38' to upright position, thereby moving the pin into the upper horizontal portion of the slot. Vith the pin in this p rti n of he s ot, t w l. b le r ha when the bolt 27'is removed from the inii'u: nce oi the. key h d. 35; the p n e ng an; e sed. by the 1 138 l p r to an the no n. Locking. pa sion...

To move the bolt tonondocking post tion, it will be understood that reverse rotation of the key head is necessary in order to lower the bolt 27 and simultaneously operate the arm 38 so that the pin 42 is returned to the position shown in Fig. 1.

To minimize the possibility of surrepti tious operation of the bolt 27, the projecting end of the plate 32 is provided so as to necessitate the formation of the recess in the key head 35, as clearly shown in Fig. It will be understood that during operation of the key, the recess 35 accommodates the projecting end of the plate 32 so as to allow of the free movement of the key head in 017 fecting operation of the bolt 27.

It will be particularly noted that the bolt B is constructed to permit of its being moved to a position reversed with respect to that shown in Fig. 1 and still be capable of operation by the arm 26 and locked in projected position by the bolt 27. In practice, it is necessary that the cam face of the head 16 be disposed at one side or the other depending upon the mounting and swinging direction of a door to which the lock 1s adapted to be applied. The reversibility of the bolt B adequately provides for this variance in application of the lock to a door.

What I claim is:

1. A combined lock and latch, comprising a. latch bolt, manually operable means for moving the bolt to latching or non-latching position. and means for locking the latch bolt in latching position, comprising a bolt movable to engage or disengage the latch. bolt, means formed on the bolt adapted to be engaged by a key for moving the bolt to either of said positions, a pivoted arm having a pin and slot connection with the bolt for maintaining the latter in either of said positions, said arm being urged to a predetermined position and arranged so as to be adapted to be engaged by a key for movement to a position in which the pin and slot connection will allow movement of said bolt, and a stationary plate positioned between the bol'tand arm and adapted: to offer resistance to any key head not recessed. for passing said plate.

2. A locking means for latch bolts, comprising a bolt mounted for sliding move ment to engage or disengage, a latch bolt. :1 projection formed on the bolt adapted to be engaged by a key for moving the latter to either of said positions, a pivoted arm provided with a slot, a pin carried by the bolt and extending into said slot, said pin and slot co-operating to secure the bolt in either of said positions, means for urging the arm to a definite position wherein said" arm is adapted to be engaged by a key for moving. the arm to a. position in which the pin can move-in said slot, a; stationary plate ads. ited to area spaced relation between. the, ol t and'ariu and past: which-I plate said bolt-and.

' arm may slide, said plate being formed so as to provide positive resistance to the move ment of any key not recessed for passing it.

3. In a look, a casing, a locking bolt slidingly mounted to extend through one edge of the casing and having a pocket on one side, a second bolt slidingly mounted in the casing in a plane at right angles to the first bolt and adapted to engage in. the pocket, :1 projection extending from one edge of the second bolt, there being a key hole in the easing towards Which the projection points, a plate secured to the casing at the opposite edge of the second bolt from the key hole and having an end extending across the opposite face of the second bolt,

a securing arm pivotally mounted at the opposite end of the second bolt from the first bolt and fitting outside of the plate having a U-shaped slot at the opposite side i of the plate from the pivot, the arms of the slot being crosswise, a pin fixed in the second bolt and operating in the slot, and a spring secured to the casing and bearing against the securing arm to press the securing arm towards the key hole. I

In testimony whereof I have signed my name to this specification. I

P. A. o. MOORE.