US1166380A - Key-lock. - Google Patents

Description

E. W. MARVEL.

KEY LOCK.

APPLICATION FILED FEB. 10. 1913.

1,166,380., Patented De0. 28,1915.

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E. W. MARVEL.

KEY LOCK. APPLICATION F iLED FEB. 1 0, 191s.

Patented Dec.28,1915.

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COLUMBIA PLANOGRAPH co Mumn'mh n c E. W. MARVEL.

KEY LOCK.

APPLICATION FILED FEB. 10. 1913.

Patented Dec 28, 1915. v

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EDWARD WILLEY MARVEL, OF PHILADELPHIA, PENNSYLVANIA.

KEY-LOCK.

7 Specification of Letters Patent. Patented DQQ. 28, 1915.

Application filed February 10, 1913. Serial No. 747,351.

To all whom it may concern Be it 7 known that I, EDWARD VVILLEY MARVEL, a citizen of the United States, and resident of Philadelphia, in the State of Pennsylvania, have invented a certain new the use of two different keys toeflecteach opening movement of the lock; and it is the ob ect of my invention to provide such a lock which may be set, by a key, so that it may be repeatedly operated by one key, until it isreset to be operated by two keys.

As hereinafter described, my invention ineludes a lock having a rotary key hub with 1 two separate keyways, respectively for a guard key and a main key, and includ ing mechanism whereby both of said keys are normally required to besuccessively inserted in said key hub to turn the latter to open the look, but which may be so set, con veniently'by said guard key, that the lock may be repeatedly operated by one other key, hereinafter termed the master key, until said mechanism is reset to normal condition, conveniently by the main key.

In the drawings Figure I is an outer face view of a lock conveniently embodying my improvement. Fig. II is a plan view of said lock. Fig. III is a vertical sectional view of the lock, taken on the line III, III in Fig. I. Fig. IV is a .view similar to Fig. I but with the casing front plate removed to show the lock mechanism in normal position, requiring two keys, to wit, a guard key and a main key. to unlock it. Fig. V is a view similar toFig. IV but showing the lock mechanism as set, by the guard key, to permit its repeated operation by the single master key. Fig. VI isa view similar to Figs. IV and V but with the lock mechanism shifted into unlocked position by the main key. Fig. VII is a view of the, lock in the position shownin Fig. V but with the tumblers removed, Fig. VIII is a plan sectional view, taken on the line VIII, VIII in F ig. VII. Fig. IX is a plan View of the key hub and cam connected therewith. Fig/X is an elevation of the guard key. Fig. XI is an elevation of the main key arranged to cooperate with the guard key to unlock said lock. Fig. XII is an elevation of a master key by which the lock may be operated.

My invention includes the various novel features 01. construction and arrangement hereinafter more definitely described.

In said drawings: 1 is the lock bolt which is fitted to slide in the lock casing Qhavin'g the cover 3 removably secured by the screws 4; in threaded engagement with the sockets 5 in said casing. Said bolt 1 carries-the stump 7 fitted to enter the gatings 8 of the tumblers9 which are mounted to oscillate on the stud 10 which is stationary in said casing 2,

but said'stump 7 has the notch 12 at the inner end thereof adaptedto engage the -serrations 130a said tumblers when an attempt is made to retract the bolt with said gatings out of alinement with said stump. Each of said tumblers 9 is provided with a spring 15, hearing at its free end upon said casing 2 and tending to, thrust the tumblers downward to the position shown in Figs.

IV and V. Each of said tumblers 9 is also provided with a projection 16 adapted to be engaged by the hook end 17 of the detent 1 18 which is pivoted on the stud l9 stationary in the casing 2 and provided with the spring 23 hearing at its free enduponsaid casing and'tending to turn said detentinto engagementfwith said projections 16qon the tumblers 9, so as to detain the latter in locked position, as shown in Fig. IV. Said detent 18 has the arm25 extending in opposition to the arm 26 of the guard lever 27, so that when the latter, which is fulcrumed on the stud 29 stationary in said casing 2, 1s rocked :from the position shown in Fig. IV to the position shown in Fig. V said detent is released from the tumblers 9 to permit the latter tobe turned by the key into the unlooking position shown in Fig. VI in which their gatings 8 are brought intoalinement Wlljll said stump 7. Said guard lever 27 has the stump 28 adapted to enter the gatings 30 of the guard tumblers 31 which are pivoted on said; stationary stud 19 and each provided with a spring 32 bearing at its free end upon said casing 2 and tending to turn said tumblers31 into the position shown in Fig. IV, in'which position they are stopped by their projections 3st encountering said stump 28. Said guard lever 27 has the arm 36 carrying the stud 37 which is adapted to be encountered by the releasing tumbler 38 which is pivoted on said stud 19 and prorestored to its normal position shown in Figs; IV' and VI, by downward movement of said releasing tumbler 38. Said guard lever is also adaptedtobe released and returned to its normal position aforesaid by the releasing lever 42 which is fulcrumed on the screw 43 in said casing 2 and has its rear end 45 extending in cooperative relation with t-he arm 36 of said guard lever 27, and its opposite end 46 extending in cooperative relation with the releasing projection u on one ofsaid tumblers 9. a

'The rotary key hub 50 has the cam 51 extending in the recess 52 of the bolt 1 so as to shift the latter back and forth when said hub is turned. Said hub isprovided with two keyways 541 and 55 which are conveniently formed in diametricalalinement, andfwhen in registry with the respective slots 56 and 57 in the hub bearing 58 on said cover 3, said keyway 54 is adapted to receive the guard kev 60, shown in Fig. X,-

and the keyway 55 is adapted to receive either themain key 61, shown in Fig. XI,

or the master key 62 shown in Fig. XII.

Said keys are. used to manipulate said lock as follows: The lock mechanism being in the position shown in Figs. I and IV; the guard key 60 is inserted in the keyway 54; in the hub 50 and the latter turned, clockwise, approximately sixtv degrees, the shape of said recess 52 being such as .to permit such movement of the cam 51 without shifting the bolt 1. Said key 60 is bitted so as to sweep the tumblers 31 into position to receive the 'stump28 in their gat-ings 30 and to then turn said "lev'er 2 7 into the position shown in Fig. V, the projection '64 on said cam 51 being so shaped as to encounter the shoulder on said lever to turn the latter. Thereupon,said hub 50 being returned to its normal position shown in Figs.' I and IV, and said key 60 being'withdraw'n, the lock is in condition to be operated to retract the bolt 1 by the main key 61 shown in Fig. XI.

Said main key 61 being then inserted in the keyway 55 of the hub 50 the latter'is' turned,

clockwise, from the position shown in Fig.

V to the position in Fig. VI. Said key 61 is bitted so as to sweep the tumblers 9 into position to receive the stump 7 in their gat-.. ings 8 thus permitting the cam to turn to the position shown in Fig. VI in which the slide bolt 1 is fully retracted. It may be observed, with reference to Fig. VI, that the unlocking movement last described, causes the releasing projection l7 to encounter the end l6 of the releasing lever 42 and turn the latter from the position shown in Fig. V to the position shown in Fig. VI so as to release the guard lever 27, from the detent 18 so that the latter is ready to reengage the projections 1601 said tumblers 9 when the latter are freed from the stump 7 by the locking movement of the slide bolt 1. Moreover, such releasing movement of the guard lever 27, from the position shown in Fig. V to the position shown in Fig. VI, frees the guard tumblers 31 from the stump 28 and permits them to return to their normal position with their projections 34 against said stump. Therefore, when the lock is thus operated by the guard key 60 and the main key 61, both of said keys are required to effect each opening movement of the lock. However, when the lock mechanism is set into the position shown in Fig. V, by the operation of the guard key 60 as above described, the lock may be repeatedly operated by a single key, to wit, the master key 62, shown in Fig. XII. It may be observed that although said master key 62 is inserted in the same keyway as the main key 61, to wit, the keyway 55 of the hub 50, and turned in the same di rection, said key 62 is so bitted that it does not raise the tumbler 9 having the releasing projection a7, and consequently operation of the lock by said key 62 does not operate the releasing lever 42. Therefore, the, detent 18, guard lever 27, guard tumblers 31 and the parts associated therewith remain in the inoperative position shown in Fig. V, during the repeated operation of the look by the key 62. In order to permit such operation, the tumbler 9 provided with the releasing projection 17 has the auxiliary gating 65 to receive said stump 7. Itis to be understood that both of said groups of tumblers 9 and .81. are changeable to form different combinations requiring keys with correspondingly changed bittmgs to operate them. Moreover, it is to be understood that I do not desire to limit myself to the precise details of construction and arrangement herein set forth as it is obvious that various modifications may be made therein without departing from the essential features of my invention asdefined in the appended claims.

I claim:

1'. In a key lock, the combination with a slide bolt; of mechanism arranged to normally detain said bolt in locked position, so

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constructed and arranged as to require the operation oi? two keys to'unlock said bolt; and change mechanism whereby the other mechanisms aforesaid may be set to permit the lock to be operated by one key.

In a lock, the combination with a slide belt; of tumbler mechanism arranged in two groups normally requiring two keys to unlock said bolt, and mechanism whereby the lock may be set to be operated by one key.

3. In a changeable combination key lock, the combination with a slide bolt; of a rotary key hub with two separate 'keyways, respectively for a guard key and a main key; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a guard lever in cooperative relation with a pivoted detent for said main tumblers; releasing mechanism, including a releasing tumbler in the group of main tumblers, and a releasing lever operatively connecting said releasing tumbler with said guard lever, arranged to release said detent; whereby a guard key and a main key are normally required to be successively inserted in the respective keyways in said key hub to turn the latter, to open the lock, but said guard key may be turned to set the lock mechanism so that it may be repeatedly operated by another key, inserted in the main keyway, until the lock is reset to normal condition by said main key.

i. In a changeable combination key lock, the combination with a slide bolt; of a rotary key hub with two separate keyways,

respectively for a guard key and a main key; main tumbler mechanism arranged to detain and release said b it in accordance with the position thereof; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a guard lever in cooperative relation with a .detent for Said main tumblers; releasing mechanism, including a releasing tumbler, and a releasing lever operatively connecting said releasing tumbler with said guard lever, arranged to release said detent; whereby a guard key and a main key are normally required to be suecessively inserted in the respective keyways in said key hub to turn the latter to open the look, but said guard key may be turned to set the lock mechanism so that it may be repeatedly operated by another key.

In a changeable combination key lock, the combination with a slide bolt; oi rotary key hub with two separate keyways, respectively for a guard key and a main key; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; guard tumbler mechabier arranged to detain and release said boltin accordance with the positionthereof, includinga pivoted detent for said. main tumblers; releasing mechanism, including a releasing tumbler in the "group of 'main tumblers, and a releasing lever operatively connecting said releasing tumbler to release said detent; whereby a guard key and a main key are normallyrequired to be successively inserted in the respective kcyways in said key hub to turn the latter to open the lock, but said guard key may be turned to the lock mechanism so that it may be repeatedly operated by a single key.

6. In a changeable combination key lock, the combination with a slide bolt; of a rotary leyhub with two separate keyways, respectively for a guard key and a main key; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a detent for said main tumblers; releasing mechanism, including a releasing tumbler in the group of main tum- 7 releasingtumbler to release said detent; whereby a guard key and a mam key are normally required to be successively inserted in the respective keyways in said key hub to turn the latter to open the lock, but said guard key may be turned to set the lock mechanism so that it may be repeatedly operated by a single key.

In a changeable combination key lock, the combination with aslide bolt; of a rotary key hub; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; guard tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof, including a detent for said main tumblers; releasing.mechanism, including a releasing tumbler in the group of main tumblers, and means operatively connecting said releasing tumbler to release said dctent; whereby a guard key and a main key are normally required to be successively inserted in said key hub to turn the latter to open the lock, but said lock mechanism may be set so that it may be repeatedly operated by a single key.

S. In a changeable combination key lock,

the combination with a slide bolt; of a rotary key hub; main tumbler mechanism arranged to detain and release said bolt in accordance with the position thereof; guard tumbler mechanism arranged to d-stain and release said bolt in accordance with the position. thereof, including a detent for said main tumblers; releasing mechanism, including a releasing tumbler and a releasing lever operatively connecting said releasing tumbler to release said detent;

and means operatively connecting said a i v 1,166,380

whereby a guard key and amain key are signed my name. at Philadelphia, Pennsylnormally required to be successively insert- Vania, this sixth day of February, 1913.

V the look, but said lock mechanism may be ed'in said keyv hub to turn the latter to open EDWVARD "VILLEY MARVEL set so that it may be repeatedly operated by WVitnesse s:

a single key. ARTHUR E. PAIGE,

' In testimony whereof, I have hereunto \VM. H. HOLLAR, Jr.

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

- Washington, D. C.

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