US204070A - Improvement in extension-locks for doors - Google Patents

Description

yJ. MOORE'. Extension-Look for Doors.

No'l 204,070.

Patented IVlay 21, A1878.

W////////////Il///////////// N.PETERS. FHOTQ LITNOGRAPHEH ASHIN 0M n C 4UnrTEn STATES PATENT OEEroE.

JOHN MOORE, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN EXTENSION-LOCKS FOR DOORS.

Specification forming part of Letters Patent No. 204,070, dated May 21, 187.8; application led February 2,1878.

To all whom it may concern: j

Be it known that l, JOHN MOORE, of Brooklyn, New York, have invented certain lmprovements in Extension-Locks for Doors, of which the following is a specification:

My improvements relate to that class of locks in which the tumbler-chamber, containing the key-hole and the stem which is rotated by the key to operate the bolt of the lock, is made capable of adjustment to adapt the lock for use on doors of variable thickness; and my invention relates to the construction of the rotating stem, both with reference to the sliding tumblers which are operated by the key and with reference to the method in which the rotating stem is made capable yof longitudinal movement and fixed adjustment.

In the accompanying drawings', which represent my invention applied to an ordinaryT rimlock, Figure lis a central longitudinal section of the lock, showing the key inserted in the proper position to rotate the stem which operates the bolt. Fig. 2 is a transverse sect-ion through the line x x on Fig. 1. Fig. 3 is a transverse section of the tumbler chamber through'the line y y on Fig. 1. Fig'.4 is anisometrical perspective of the rotating stem, showing the crooked upper end of the stem provided with longitudinal slots to admit the wardsof the tumblers when the key is not inserted, and also showing the semi-cylindrical shape of the lower part of the stem and the longitudinal tongue on the flat face ofthe stem, which engages a groove in a corresponding semi-cylindrical piece which is contained 1n the bearing in which the stem rotates. Fig. 5 is a transverse section of the stem bearing through the line z z on Fig. l.

On reference to the drawings it will be seen that the tumbler-chamber is a rectangular recess in the cylinder A, which contains a series of loose tumblers, a, placed one upon the other, and adapted to slide back and forth, when operated upon by the key B, or by their gravity, in either direction, or by the action of the flat spring al on one side of the tumbler-chamber. The upper en'd c of the rotating stem C, which operates the cam-shaft I, and consequently the bolt, projects through the base of the tumbler-chamber, and occupies a central position therein in proper relation to the hole in the face of the cylinder A, through which the key B is inserted. The tumblers a are perforated plates of thin sheet metal, and are each provided with the inwardly-projecting tongues or wards a?, one or the other of which, when the key is not inserted, drops into one ofthe longitudinalrecesses c in the upper end ofthe stem C, and hence prevents the turning of the stem. The cylinder Ais prevented from turning by reason of being secured to the steadying-plate D, which extends inwardly, and is also secured to one side of the box E, in which the stem C has its principal bearing. The steadying-plate D is provided with the slots d for the almission of the screws df, by which it is fastened to the cylinder A and the box E, respectively, the object ofthe slots being to allow the fastening of the chamber A at variable distances from the box'E. I

Instead of the steadying-pla'te D, pins may be inserted in holes drilled through the cylinder A and into the box E. Such pins may be held by set-screws corresponding to the screws d. As the Ycylinder A is amply supported upon the substantial stem O, the principal function of the steadying-plate or pin is to prevent the cylinder from turning.

It will be seen that the edges of the key conform to the shape ,of the edges of the slot c' in the crooked upper portion c of the rotating stem, and hence when the key is inserted the wards of the tuinblers a2 are thrown out of the slots c', and the stem O can then be turned by power applied to the key. The principal bearing e ofthe rotating stem is contained in the box E, and it will be seen that this bearing is filled with a shaft composed of ltwo parts, one of which is contributed by the lower portion of the stem G and the other by the corresponding semi-cylindrical piece F, which is 'provided with the recess f in its periphery for the reception of the edges of the stop-plates fl and f2, which are respectively screwed to the opposite sides of the box E, and serve to prevent any longitudinal movement of the piece F. The piece F is provided with the longitudinal groove Gto receive and engage the tongue on the sliding stem G. At its lower end the piece F is also provided with the projecting half-collar H, which bears upon the inner face of the box E, and which answers the purpose of a crank to rotate the hollow cam-shaft I, which operates the bolt of the lock. The connection of the cam-shaft I with the crank His effected by means of the tongue fi, which projects into the groove i' in the face of the projecting halfc01lar H. The cam-shaft is made hollow to allow the longitudinal movement of the sliding stem O. The curved periphery of the sliding stem O is provided with a series of grooves, la, which are represented as being about a quarter of an inch apart, and which correspond to the groove f in the stationary piece F in respect to engaging the edges of the stop-plates f1 and f2, by means of which the longitudinal movement of the stem O is prevented.

It will, of course, be understood that the crank H may be connected with the cam-shaft in any convenient way-as, for example, by pins projecting into acollar on the cam-shaft, if desired.

IVhen it is desired to vary the distance to which the chamber A projects from the lock, the stop-plate f2 is removed by loosening the screw K, and, the screws d being loosened, the chamber and sliding stem O may be moved in either direction to the desired point, and may be then permanently fixed at that point by again tightening the screws cl and applying the stop-plate f2. The permanent connection ofthe stem C with the chamber A is effected by means of the groove k1 and the stop-plates k2, which are fastened to the inner face of the chamber A, and the edges of which enter the groove k in the periphery of the stem C.

As doors Vary in width usually by quarters of an inch, it will be seen that the series of equidistant recesses 7c in the sliding stem sufficiently adapt the lock to such longitudinal extension as may be required for ordinary use. If desired, of course, the number of these recesses may be increased, and they may be placed closer together.

I claim as my invention in an extensionlock substantially such as describedl. The tumblers a, provided with the inwardly-projecting tongues a2, in combination with a rectangular chamber and a crooked rotating stem provided with the longitudinal slots c', substantially as and for the purpose set forth. y

2. A cylinder provided with a rectangular chamber for containing a series of sliding tumblers and for receiving the crooked upper portion of the rotating stem, in combination with the slotted steadying-plate D and the box E, substantially as described.

3. The sliding stem O, in combination with the box E and the semi-cylindrical piece I1", provided with a projecting collar or crank for operatin g the cam-shaft I and supporting the semi-cylindrical portion of the stem O in the bearing e, substantially as described.

4. The stem C, provided with the recesses lc in its periphery, in combination with the stop-plates f1 and f2, substantiallyas described.

JOHN MOORE.

Witnesses:

M. L.' ADAMS, GEO. W. MIA'rT.

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