US233922A - coyert - Google Patents

Description

(Model.) 2 Sheets-Sheet 1.

H. W. COVERT. Permutation Look.

` No. 233,922. Patented Nov. 2, Isso.

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H. W. GOVERT.

Permutaton Look.

No. 233,922. Patented Nov. 2, 1880.

By his Harney/s @www Zim IVO UNITED STATES PATENT OFFICE.

HENRY W. OOVERT, OF NEW YORK, N. Y., ASSIGNOR TO MARVIN SAFE AND SCALE COMPANY, OF SAME PLAGE.

PERMUTAT'ION-LOCK'.

SPECIFICATION forming part of Letters Patent No. 233,922, dated November 2, 1880.

Application filed May 22, 1880.

llo all whom it may concern:

Be it known that I, HENRY W. OOVERT, of New York city, have invented certain new and useful Improvements iu Combination-Locks, of which the following is a specification.

My invention relates to improvements in the construction of combination-locks for safes in which a thick lining of plaster or other nonconductor of heat is employed to render them rire-proof.

Myinvention relates particularly to improvements in the kind of combination-lock described and illustrated in the patent of W. K. Marvin, dated July 28, 187 4, No. 153,588. In that lock the dogging appliances project inward from the lock-case, and are necessarily more or less exposed to contact with the fire-proof filling.

My improvements consist, first, iu an improved construct-ion whereby a sliding locking bar or dog is moved at right angles to the line of motion of the bolt-work, (not illustrated,) so as to effectually dog or cheek the latter 5 second, in an improved construction whereby the lock-case and the dial-ring are securely attached to the door without the use of the ordinary screw-bolts or rivets; third, in an improved tumbler-fence so constructed and applied as to serve for 'transmitting motion to the dogging bar or bolt.

The nature of my improvements and the manner in which I prefer to embody them are illustrated in the accompanying drawings, in which- Figure l is a plan view, partly in section, on the line 1 1 of Fig. 2. Fig. 2 is a vertical longitudinal section on the line 2 2 of Fig. 1. Fig. 3 is a transverse section on the line83 of Fig. 1. Fig. et is a transverse section on the line 4 et of Fig. 1; and Figs. 5, 6, 7,8, and 9 are detail views of the tumblers and their fittings, with respectv to which I claim nothing.

In Figs. 1 and 2, A indicates a section of the outer metallic plate of a nre-proof safe or vault door, and B indicates a section of the inner plate of the same. The lock-case C is shown in position between these plates, extending the whole distance from one to the other, so as to dispense with a well, and it is to be surrounded bysuitable lire-proof iilling. The front end or tubular nosing, C', of this case is rep- (Model.)

resented as screw-threaded and projecting through the outer plate of the door, while the rear end passes through the inner plate and rests flush with its surface. The case is preferably cast in one piece, with a hollow interior of suitable shape to accommodate the lock mechanism, and of substantially corresponding external outline. m

D indicates ordinary rotary tumbler mechanism, operated by the spindle E. The inner end of the spindle enters the tubular axis F of the first tumbler, and is secured therein by means of its screw-threads and a spline, G, or in any other convenient manner. This tubular axis has its bearing in the hollow circular projection H of the cap-plate I. All the tumblers except the rst are mounted loosely upon the circular projection H, and are so connected with the lirst tumbler as to be successively picked up and rotated and their gating-s brought into line in the usual manner of conibination dial-locks of this character.

Kindicates the graduated dial and its knob, attached to the outer end of the spindle, and working in the usual way in the dial-ring L.

A fence, M, swings loosely upon a pivot, N, which passes through the inner end of the case and enters a supporting-plate, O. This felice is provided upon one side with a cam, P, which enters an inclined groove, Q, in the sliding dogging-bolt R, for securing the boltwork of the door. This bolt-work is supposed to be mounted next the inner face of the outer door-plate, and to be provided with a suitable recess, into which the (logging-bolt can enter when the bolt-work is thrown forward into the fastening position. A spring, r, (which is not indispensable,) tends to retract the dogging-bolt, and, through the cam P, to swing the fence down into the tumbler-gatin gs wherever they are brought into line under the fence.

In setting up my lock the nosing carrying the nut S is screwed a short distance (controlled bythe position of the nut) through the outer plate of the door. The dial-ring is then placed in position upon the nosing and a nut, T, screwed down, so as to firmly clamp the ring and outer plate between the two nuts. The spindle, carrying the dial and its knob, is

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then inserted and secured from the inside. The tumblers are then mounted and the capplate secured in place, as indicated in the drawings, so that the joint between the lockcase and the inner door-plate is covered. It Will thus be seen that .I effect a secure tighttting attachment of the lock and the dialring to the door entirely without the use of the holes, screws, or rivets ordinarily employed.

In locks as heretofore constructed it has been customary to employ three or four tap-bolts for securing the lock-case to the door, two or three screws for fastening the dialring to the front of the door, and from four to twelve screws or rivets for attaching and securing in place the Well-hole in the door, and the cap for covering the same on the interior. Most, if not all, of these holes required not only to be drilled, but tapped or screwthreaded, so that the cost of drilling and tapping, and of fu ruishing the necessary screws and rivets to be used,

has constituted a very large addition to the i cost of locks of this class. By means of my invention a proper attachment ot' the parts is secured', While allot' this expense is saved, a single small hole only being required in each of the two plates of the door.

In operating my lock the dial rotates the tumblers, as usual, and the vibrating fence rests against the periphery of the tumblers, so that when their gatings are in proper position it can fall into them and be farther swung to one side, which will result in actuating the cam, so as to retract the doggingholt. The` reverse motion of the dial, when the lock is unlocked, throws the dogging-bolt forward into position to check or prevent the motion of the boltwork, and continued motion of the dial in the same direction will derange the tumblers of the lock, so that the fence cannot again fall or the lock be opened until the tumblers are set in their proper position by a person knowing,r the combination on which they are arranged.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the case C, with a screw-threaded tap or nosing, and the clamping-nets S and T, for holding in place on the door the lockcase, and the dial-ring, as set forth.

2. In combination with a lock-case, C, the sliding doggingmolt, moving in a direction parallel with the lock-case and its spindle, and its operating mechanism, substantially as and for the purposes described.

3. The combination of the lock-case, the vibrating fence, the cam or inclined projection thereon, and the sliding dogging-bolt, which is operated by said cam and moves in a direction parallel with the case and spindle ot' the lock, substantially' as described.

In testimony whereof I have hereunto suhscribed my name.

HENRY W. COVERT.

Witnesses:

. EDWARD C. GRAVES, SCHUYLER MEnaIr'r.

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