US1183494A - Lock. - Google Patents

Description

A. RE.

LOCK.

APPLICATloN FILED ocr. 7. |915.

Patented May16,1916.

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VTi' 'S 5 47 ALFRED RE, 0F NEW YORK, N. Y.

LOCK.

Specification of Letters Patent.

Patented May 16, 1916.

Application led October 7, 1915. Serial No. 54,597.

To all whom t may concern:

Be it known that I, ALFRED Rn,.a citizen of the United States, residing at New York, in the county of New York and State of New York, have-invented certain new and useful Improvements in 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 tow which it appertains to make and use thesame.

My invention relates to new and useful improvements in locks and is more particularly an improvement over my former Patent No. 1,134,907, dated April 6,1915, and my object is to provide a pivot latch adaptedto engage with the keeper to hold the door in closed position.

` A further object is to provide a locking pin having a spiral slot therein which when the pin is rotated will coperate with a stud to cause the locking pin to move longitudinally.

A further object is to provide a slot in the end of the locking pin to receive a key, said key being adapted to operate the locking pin. Y

A further object is to provide suitable slots in the faces and edges of the key to cooperate with projections in the pin receiving tube.

A further object is to provide the pivot pin of the latch with a slot for the reception of the key, said key being designed to swing the latch out of engagement with its keeper when the locking pin is disengaged therefrom.

A further object is to provide a plurality of projections adapted to coperate with notches formed in the key. And a further object is to provide suitable drums through which the keys are introduced, said drums having notches therein adapted to prevent the introduction of the wrong key.

Other objects and advantages will be hereinafter set forth and more particularly pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application, Figure 1 is a horizontal central sectional view through the lock and parts coperating therewith. Fig. 2 is a detail plan view of key receiving sockets showing the manner of securingthe 'drums therein. Fig. 3 is an end elevation of one of the drums. Fig. 4 is a transverse sectional view thereof. Fig. 5 is a side elevation of one of the drums. Figs. 6 and 7 are side elevations of a key employed for swinging the latch on its pivot showing opposite sides thereof. Figs. 8 and 9 are similar view s of la key employed for operating the locking pin. Fig. 10 is a transverse sectional view through the latch operating pin. Fig. 11 is a similar view of the locking pin operating key, and Fig. 12 is a detail sectional view of the key engaging end of the latch pivot pin.

' Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 indicates a door which may be constructed in the usual or any preferred manner and 2 the door jamb, the edge of the door having an offset' 3 therein to receive a projection 4 of the door jamb. Secured to the face of the door jamb and partially embedded therein is a keeper 5, said keeper having a notch 6 therein to receive the end of the latch 7 said latch having at its opposite end a pivot pin 8, said pin finding bearings in a plate 9 which plate is attached to the face of the door. The latch 7 is also provided with a recess 7a in one face thereof which receives one wall of the notch 6 of the keeper 5 and renders the lock jimmy proof.

The inner end of the pivot pin 8 is entered in a tube 10 and is provided with a notch 11 to receive the end of a key' 12, said key having a notch 13 in its end to receive a cross bar 14 formed at the longitudinal center of the notch 11. The inner end of the tube 10 is entered into a thimble 15 which thimble is threaded into the open end of a socket 16 carried by a plate 17, said late being attached to the outer face of the oor.

The end of the socket 16 projects through the plate 17 and is restricted to form a shoulder 18 between which and the end of the thimble 15 is positioned a drum 19, said drum having a slot 20 therethrough for the reception of the key 12, one face of the slot having a pair of extensions 21 to engage the longitudinally extending recesses 22 in one face of the key, while the opposite face of the slot is provided with a single extension 24 adapted to engage a single slot 25 on the opposite face of the key, and it will be readily seen that unless the key is provided with slots arranged to receive the extensions, it can not be introduced in the slot in the drum. Each edge of the key 12 is provided with notches 26 and 27 respectively, which notches are designed to coperate with projections 28 and 29 on the interior of the tube 10 and unless said notches are arranged to register with said projections, it will be impossible to rotate the key after it is introduced into the tube.

To guard against the introduction of the key after the notches have been removed therefrom, each key is provided with one or more openings 30 with which is adapted to engage a pin 31 carried by a pawl 32, said pawl being pivotally mounted in a cavity 33 formed in the drum, said pawl being movable transversely of the path of the key. The pawl is held in engagement with one face of the key as it passes into the lock by means of a spring 34, the engaging face of the free end of the pawl being wider than any of the notches in the edge of the key so that when the proper key is introduced the pin will be held out of engagement with the opening in the key, but should the key be iiled to remove the notches, the free end of the pawl will move inwardly so as to bring the pin into the path of the opening in the key and when one of the openings is brought into registration with the pin, the spring 34 will force the pin into said opening and prevent the further introduction of the key into the lock.

The inner end of the locking pin 37 is provided with a notch 43 with which cooperates the end of a key 44, one edge of the key having a plurality of notches 45 which, when properly constructed, register with projections 46 on the interior of the tube 41. This key is of similar construction to the key 12 except that there is but one longitudinal groove on each side of the key, the' groove 46 being centrally of the key, while the groove 47 is adjacent one edge thereof. The edge of the key opposite the notches 45 is also provided with offset portions 48 and 49, the offset 4S coperating with the shoulder in the notch 43, while the offset 49 coperates with the interior face of the tube 41. In this instance a pair of openings 50 are formed through the key with which coperates a pawl 51 similar to the pawl 32, carried by the drum 52.

The inner end of the thimble 42 and the drum 52 are mounted in a socket 53 similar to the socket 16, said socket having a slot 54 to receive a stud 55 carried by the drum 52. In operating the latch to open the same, the key 44 is first introduced through the drum 52 and the end thereof engaged with the notch 43 in the end of the locking pin 37 and the key then given a quarter turn, this operation causing the locking pin to travel out of engagement with the socket in the latch, owing to the formation of the cam slot of the locking pin and the stationary stud engaging the same. The length of the key 44 is such that when the pin 37 is in locked position the end of the key will just enter the notch 43 a sufiicient distance to insure the rotation of the pin when the key is rotated and will travel into the notch as the pin moves toward the key and vice versa when the pin is in unlocked position. The key 12 is then introduced through the drum 19 and the end thereof engaged with the notch 11 in the end of the pivot pin 8, when by giving said key a quarter turn the latch will be raised out of engagement with the notch of the keeper so that the door may be swung open, thus requiring two separate and distinct keys for unlocking and operating the latch. In locking the latch, how* ever, it is but necessary to use the key 44, the same being employed for giving reverse rotation to the locking pin in order to enter the same into the socket 38 of the latch. When the latch is thus secured, it will be impossible to open the door until such time as the locking pin is released from the latch and the key introduced into engagement with the pivot pin of the latch, that is to say from the exterior of the building or room. The keys 12 and 44 have their forward ends slightly rounded on one face of the key so that when introduced into the drums, the ends of the keys will readily enter between the pawls and the contiguous portions of the drums, the pawls readily traveling over the rounded surfaces and moving out of the path of the keys. It will be understood of course that it is not necessary to turn the locking pin into engagement with the latch in order to lock the door as the latch will ride up the keeper 5 and enter the notch 6 and securely hold the door in closed position until the latch is again raised, either by hand or through the medium of the key 12. It will also be seen that by providing the offset in the door and door jamb `and by placing a protecting plate f56 on the inner face of the door adjacent the keeper 55, it will be impossible to use a jimmy or other tool for raising the latch. It will likewise be seen that should keys having the same longitudinal channels therein but different notches from those shown on the key be filed down to eliminate the notches so as to pass the projections in the tube, the pawls in the drum will drop into the openings in the key and prevent their introduction into the lock.

I-Iaving thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is 1. In a lock, a pivotally mounted latch, a keeper coperating therewith, a'key adapted to engage the pivot point of the latch to disengage the latch from the keeper, said key having openings therein, a pawl having a pin adapted to engage the. openings in the and means on the pawl to hold the pin out of engagement with the openings when the proper key is used.

2. In a lock, a pivotally mounted latch, a keeper coperating therewith, a key adapted to engage the pivot pin of the latch to raise said latch when the key is rotated, said key having openings transversely therethrough, a drum through which said key extends, a pawl pivotally mounted within the drum and moving in a plane at right angles to the path of the key, a pin on the pawl adapted to enter said openings and prevent the full insertion and operation of the key, and additional means on the pawl adapted to hold the pin out of engagement with said openings when the proper key is used.

3. In a lock, a latch, a keeper coperating therewith, a pivot pin for the latch, a lock ing bolt, means to cause the locking pin to travel into or out of engagement with the latch, an operating key for the locking pin having transverse openings therethrough, a drum through which said key extends, a

pawl having a pin thereon adapted to engage said openings to prevent the introduction and operation of the key and means on said pawl to engage the right key and hold the pin out of engagement with the openings.

4. In a lock, the combination with a pivoted latch, a locking means therefor, and keys to operate the locking means and latch, said keys having openings transversely therethrough, of drums through which saidkeys extend, pawls carried by the drums having pins thereon adapted to enter said openings to prevent the operation of said keys and additional means on the pawls to prevent the pins from entering the openings in the right ze s.

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

ALFRED RE. Witnesses:

W. SooTxIRxPATRIoK, FRANCK LEPORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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