US963427A - Door-lock. - Google Patents

Description

c. RuBRKBNs. DOORLOGK.

APPLIOATION FILED NOV. 30, 1909.

- Patented Ju1y5, 1910.

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DOOR 1.00K. nrmonzon FILED nov. so. 190'9.

Patented July 5, 1910.

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CHARLES n. ERKENS, or NEW YORK, N. Y.

Patented July 5, 1910. Serial No. 530,576.

963,427. Specification of Letters Patent.

Application led November 30, 1909.

To all whom 'it may concern:

Be it known that I, CHARLES R. ERKENS, a citizen of the United States, residing at New York city in the county of New York and State of ew York, have invented certain new and useful Improvements in Door- Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to new and useful improvements in door locks and especially to the class adapted to permit the door being partly opened forventilating purposes, yet not sufficiently to allow entrance from the outside.

An object of my invention is to provide a lock having a pair of locking bolts, one working within the other and a further object is to provide a device to coperate with one of said locking bolts, in order that the door may be partly opened yet secured against entrance from the outside.

These and other objects will be more particularly referred to in the accompanying specication and claims.

In the drawings forming a part of this application, Figure 1 is a front elevation of my improved lock in its assembled position. Fig. 2 is a perspective view showing how the lock would appear in coperation with a door, said door being partly open. Fig. 3 is a longitudinal sectional view showing both of the locking bolts extending outwardly for the purpose of locking the door. Fig. 11 is a transverse sectional view of the lock. Fig. 5 is a longitudinal sectional View showing both of the locking bolts withrawn, in order that the door may be opened. Fig. 6 is a longitudinal sectional View showing the secondary bolt extended beyond the lock. Fig. 7 is a detail plan view of the main locking bolt. Fig. 8 is a detail plan view of the secondary locking bolt. Fig. 9 is a fragmentary det-ail view of the guard used in connect-ion with my lock.

Referring to the drawings in which simi` lar reference numerals designate corresponding parts throughout the several parts, 1 and 2 are the usual form of door and doorframe and upon the frame 2, is secured by any preferred means, a keeper 3, said keeper consisting of the usual base and top plates secured by means of screws et and 4c or the like, while in the top plate of said keeper is fashioned a substantially T shaped opening 5, and a guard 6 is pivotally mounted on a bolt 7 within the keeper 3, said guard comprising a substantially rectangular 'strip of metal or the like, having a portion of its [surface stamped out to form a channel, said channel being of. the same width from a point adjacent the free end of said guard and extending for a part of the length thereof to a point adjacent the lower end of the keeper 3, where it is broadened out in order that a substantially T shapedlocking bolt 8 may pass into the keeper 9 and be held in engagement by the guard when said bolt is moved laterally along the narrow portion of the channel.

The secondary locking bolt 8 is adapted to move longitudinally through the main locking bolt 9, each of the said bolts being operation of each by means of knobs 10 and 11 respectively, extending beyond the face plate 12 of the housing 13, the knob 10 be- 14 cut 1n the face plate 12, the tion of said channel having .a shoulder 15 in which the knob 10 is adapted to rest when it is desired to secure said knob in its normal closed position.

Referring' to Fig. 8, it will be seen how the secondary locking bolt 8 is constructed. The stem 16 thereof is of T shaped outline and to the head 17 ofthe T, near its ends, are secured the outer ends of parallel rods 18, 18, having applied to their inner ends a plate 19.

By referring to Fig. 5, it will be seen how the secondary bolt 8 is held in a retracted position in order to overcome the pressure exerted by the springs 20 and 20 which encompass the rods 18 and 18. Integral with the knob 11 is a dog 21 which is designed to rotate with said knob and bear against the plate 19 when it is desired to hold the secondary bolt 8 in a retracted position. A pair of oppositely disposed lugs 22 and 22 extend inwardly from the housing, lwhile one end of the springs 20 and 20 respectively bear against said lugs 'and the rods 18 and 18 are adapted to move laterally through openings provided in said lugs. When itis desired to release the secondary bolt, the knob 11 is rotated out of its locked position, thus releasing the doo' 21 from pressure againstv the plate 19 and thus the springs so constructed as to allow' the independent 4with the dog 21 `to lock the door,

' the lock without what would otherwise ingly in order y j unlocking the door i keeper, through the f Y herein shown,

Vlocking bolt has tively,

Y the secondary lockingv 20 and 20 having one end in engagement with the member 17 respectively will cause said secondarylocking bolt 8 to slide beyond the housing and also out of the main locking bolt 9, all as disclosed in Fig. 6.

y Referring to Fig. 7, ,it will be seen how the main locking'bolt is constructed. Y' Said main a 'channel extending longitudinally therethrough corresponding in outline to the shape of the secondarylocking bolt 8,-while adjacent the inner end is a pair of vertically extending lugs 23 and 23 to which are secured rodsl 24 and 24 respecwhile a dog 25 islet into and pivoted to saidV main bolt, said doglbeing also engaged at y*one end by the knob 10. 'A shoulder 26 is cut in the endof the dog 25 adjacent said knob and -designed toy coperate secondary locking bolts are sprung outward thus preventing either of from being drawn within a suitable key.

`By referring to Fig. 3, it will be appreciated how the - dogs 21 and 25 cooperate to hold thelocking bolt 9 projected and in be the corresponding 8, although retracted The end Vof the dog 25 vopposite to the end which has a shoulder 26 is substantially circular, said circular portion finding a bearingsurface on lthe inclosing walls ofV the cut out portion in which saidl lockin bolts position of the bolt within the bolt 9.

thexdog is countersunk, so whenthe knob 10 is slid along the channel 14, the dog 25 will draw -the'locking bolt 9 inwardly andthe pivoted end'of said dog will'rotate` accordto facilitate the operation. Of course, the mechanism shown and described so far, is for the lock as applied to the inside of the door, but for purposes of from the outside, means maybe provided to coperate with the herein described lock, whereby a kkey maybe inserted from the outside and the door opened.

Should the `door have been leftopen and bolt in engagement with the guard 6, it 'would vbe necessaryfirst to close the door inorder that the secondary locking boltmight register within the keeper 3, vafter which' the key might. be turned to withdraw said locking bolt from within the wide vportion of the channel in said guard and :thence into the housing 13. f Y y Although the .arrang'ement'v ofrparts, as is the preferred form, yet I when both the main andv wish it understood that I am not yto be restricted by the same, should I care to make any changes without departing from the spirit of the invention. What I claim is 1. A door lock, comprising a main locking bolt carrying a dog thereon, a secondary locking bolt adapted to move longitudinally through said main locking bolt, said secondary locking bolt havingspring encompassed .parallel rods projectingtherefrom and connected at their ends, an additional dog adapted to have engagement with said other dog and coperating with said secondary bolt, a keeper adapted to receive the end of -said secondary bolt and \a slotted guard adapted to receive thel stem thereof and permit said stem to travelV therein when said main boltV is not in use.

2. A door lockcomprising a main locking bolt, a substantially T shaped secondary locking bolt adapted to move longitudinally in said main locking bolt, a dog pivoted to saidv main locking. bolt, means projecting through an arcuate channel in the locking case for movingsaid dog, an additional dog adapted to engage withthe first referred to dog for holding said main bolt in projected position and means for actuating said additional dog, said secondary locking bolt hav- 'ing parallel rods projecting vtherefrom and through, means to operate said main locking u bolt, additional means to operate said secondarybolt independently of said main bolt and adapted to engage said'rst referred to means for holding said main bolt projected, a keeper adapted to receive the outer end of said secondary bolt Aand a slotted guard adapted to receive the stem'th'ereof.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. j l

i CHAS. R. ERKENS.

Witnesses: f

W'rLLrAiir LINDER, ARTHUR E., Woon.

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