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Publication numberUS166620 A
Publication typeGrant
Publication dateAug 10, 1875
Filing dateDec 17, 1874
Publication numberUS 166620 A, US 166620A, US-A-166620, US166620 A, US166620A
InventorsJames G. L. Martin
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in locks for doors
US 166620 A
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Description  (OCR text may contain errors)

N0. 166,620, Patented Aug.10,1875;


@fm T FW i w 4 WITNESSES |NVENTO'R Fcl Wi@ @fw/f@ 1.1i. L. MARTIN. heet-WSW Locks for Doors.

NO. 166,620. Patented Aug.10,l875.




Specification forming part of Letters Patent No. l 66,620, dated August 10, 1875; application led December 17, 1874.

To all whom it may concern:

Beit known that I, JAMES G. L. MARTIN, of Eufaula, in the county of Barbour and State of Alabama, have invented certain new and useful Improvements in Combined Bar- Locks for Doors; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The design of this invention is to combine a lock with a pivoted bar for doors of dwellings, banks, warehouses, barns, corn cribs, ginhouses, and smoke-houses, and to fasten and unfa-sten the door-bar by means of a key from the outside of the door.

The bar-lock consists of a pivoted fasteningbar applied to the inner side of a door, and made to enter keepers on the door-jamb, and locked and unlocked therewith, from the outside of the door, by means of a hook-shaped extension of the bar entering a lock-case and engaging with a pivoted tumbler or elbowlever, which is disengaged for freeing the bar by means of a camcarried by a revolving pulley or disk, that is irst unlocked from a xed spindle, a-nd then turned on the same by a key inserted from the outside of the door, and entered into the face of the pulley. rlhe pulley is grooved, and carries a chain, which is connected with a spring catch-plate on the end of the fastening-bar, so as to release said catch from the keeper, and then, by turning the pulley by the key, the chain is wound on the pulley, so as to turn the bar on its pivot until it is disengaged from the keepers, which enables the door to be opened, the unwinding of the chain and the lowering and fastening of the bar being also effected by the key and the weight of the bar.

The special features ot' invention which I have made will be specifically pointed out in the claims.

In the accompanying drawings, Figure 1 represents al1 elevation of a combined barlock embracing my invention, and showing the door-bar fastened and the lock-casing removed; Fig. 2, a similar elevation, showing the door-bar unfastened; Fig. 3, a vertical cross-section at the line m a; of Fig. 1, showing the pulley locked with its fixed spindle or arbor; Fig. 4, asimilar view, showing the pulley unlocked from the fixed spindle or arbor; Fig. 5, a view in perspective of the pulley un: locked from its spindle; and Fig. 6, a similar view, showing the pulley locked with the spindle.

The door A may be that of a dwelling or warehouse, bank-vault, or other place of deposit. B designates the casing or frame into which the door is set. To the inner side of the door is attached, by means of a pivot-bolt, a, a transverse horizontal fastening-bar, C, the ends of which are caused to enter bracketshaped keepers D E, securely fastened to the door-casing. The keeper D is formed with a closed outer wall, b, on the inner side of which is made a shoulder or offset, c, for the reception of a locking or spring catch-plate, cl, applied to the end of the fastening-bar. The catch-plate yields sufficiently to permit the fastening-bar to pass within the shoulder, and it springs into place to hold the bar in a locked position. The pivot pin or bolt of the fastening-bar is generally located at a short distance from the center of the same, so as to cause a preponderance of weight to be at one end of the bar, the result of which is that receive the horizontal arm of a locking-tumbler or elbow-lever, H, pivoted within the lockcase G. This tumbler is pivoted to the front plate of the lock-case, and the remainder of the lock mechanism occupies the inside space of the case and the back plate. The bar-locking tumbler H is arranged in front of or in proper relation to a pulley or disk, I, fitted on a stationary spindle or arbor, J, the front end of which terminates at the front key-hole plate,

and the rear end of which passes through the back plate of the lock-case, and is screwed into a nutplate, f, located thereat, and held from turning by a square hole in a plate, f. The pulley or disk is circumferentially grooved, and it carries a chain, K, which is attached to the catch-plate d on the end of the fasteningbar. The spindle or arbor J is made cylindrical nearly its entire length,so as to enable the pulley to readily turn on the same, and it is provided with a square, oval, or angular portion or boss, L, in front of the pulley I, which projection is designed to enter a corresponding recess in a vkey receiving and holding plate M on the front face ofthe pulley. Wvhen the parts are in this position the pulley is held stationary or flxed on its arbor, as the square projection and recess will preclude the turning of the same. The pulley is constantly pressed forward, so as to cause it to engage with the square projection on the arbor, through the medium of a spring N, interposed between the rear face of the pulleyr and the back plate of the lock-case. The spring is, in the present instance, made in a curved or plate form; but any other suitable spring may be employed for accomplishing the same result. Iteversely-running seats or recesses O, Fig. 7 in the back plate of the lock-case, eceive the ends of the platespring N, to allow the same to move to a proper extent. A conv'ex plate or block, P, having a grooved rear face is fitted on the central or bow portion of the spring, which serves to hold it in contact with a correspondingly-convexed plate, Q, fitted into and securely fastened on a circular seat or recess, R, formed in the rear :face of the pulley or disk. The two convex surfaces, placed in contact with each other, tend to produce a sort of globe-bearing', which will enable the pulley to turn freely. The key spindle or arbor passes through the pulley, conveX bearings, and spring, and thus serves to hold the designated parts in proper relation to eacl other. The key S, employed in connection with my bar-lock, is provided With a long tubular barrel, m, and with a bifurcated inner end or branches, n, havin g projections or points 0. The plate M on the front face of the pulley is provided with openings p, corresponding with the points 0, and it will thus be perceived that by introducing the key from the outside of the door, so as to engage with the plate M, the pulley can be moved longitudinally on its arbor, for unlocking it, by pressing' the key in an inward direction, and then it ca'n be rotated by turning the key, which receives the angular projection L be tween its prongs n. The door-bar is unlocked through the medium of a cam-shaped block, T, on the pulley, which, when the same is turned, will come in contact with the vertical arm of the tumbler or elbow-lever H, and turn the same on its pivot, for releasing it from the locking-arm F of the hook F. The rotary movement of the pulley will also wind up the chain, thus releasing the fastening-catch on the locking-bar, and drawing the same from its keepers.

In connection with a lock and key of the construction specified, I propose to use two or more key-hole plates, U V, located, respect ively, on the outer and inner sides of the door, and provided with key-openin gs, crossing each other, or arranged at right angles to each other, at such distance as to allow the key-fork to turn freely in the key-hole. In order to introduce the key into the pulley it will be necessary to alternately push and turn the key until it strikes the pulley. I also provide means for operating the locking-bar from the inner side of the door, and this I accomplish by attaching a rod or wire, YV, to the vertical arm of the tumbler or elbow-lever H, and running it through the bottom of the lockcase, where it terminates in a button or loop. The tumbler is also connected by a wire, X, with the free end of a platespring, Y, Figs. l and 2, attached to the front plate of the lockcase. By pulling on the wire WV the tumbler is released from the locking-bar, and the same can then be moved by hand. The spring Y holds the tumbler in proper position for operation with the hook-arm of the lockingbar.

I claiml. The combination, with the pivoted locking-bar C, provided with the hookF IT', ofthe lever H and the cam-pulley 1 T, connected with said bar C by the chain K, whereby the bar C is both unlocked and turned by the direct action of said pulley, as set forth.

2. In combination with the fastening-bar O and grooved pulley I, the connecting-chain K and the spring catch-plate d on the end of the fastening-bar C, substantially as and for. the purpose herein set forth.

3. The combination of the pulley I, having a rotating and sliding movement upon its spindle, with the angular boss L on the arbor J, the spring N, and the angular socket in the pulley I, whereby the pulley is released from the locking-boss and rotated to raise the bar, as herein set forth.

4. The convex bearingplates P Q, in combination with the revolving pulley I, the spring N, and the lock-case G, substantially as and for the purpose specied.

5. The lock-case G, provided with reverselyrunning seats or recesses O, in combination with the pressure-spring N and pulley l, substantially'as and for the purpose herein described.

In testimony that I claim the foregoing as my own I have afxed my signature in presence of two witnesses.

JAMES G. L. MARTIN. Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5984380 *May 17, 1996Nov 16, 1999Access Denied, Inc.Tether assembly
Cooperative ClassificationE05B63/0013