US41817A - Improvement in locks - Google Patents

Description

UNrTEn STATES GASPAR JAGY AND FREDERICK DENZLER, OF NEW YORK, N. Y., ASSIGNORSy PATENT OEEICE.

TO WALTER K. MARVIN, OF SAME PLACE.

IMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent No. 41.817, dated March 1, 1864.

.T0 all whom. it may concern:

Be it known that we, GASPAR JAGY and FREDERICK DENZLER, bothof the city, county, and State of New York, have invented a new and Improved BurglarProof Lock; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making apart of this specification, in which- Figure l is an internal view of our invention; Fig. 2, a transverse vertical section of the same, taken in the line w Fig. 1, Fig. 3, a horizontal section of the'same, taken in the line y y, Fig. 1.

Similar letters of reference indicate correspending parts in the several iigures.

This invention relates to an improved lock of that class which are provided with tumblers operated through the medium of a key,

and the bolt moved by a separate or distinct application ot' power, and commonly termed burglar-proof locks.77

The object of the within-described invention is to simplify the construction. and arrangement of this class of locks so that it will not be necessary to employ both hands simultaneously in unlocking' and locking the lock, and the lock rendered incapable of being picked by tampexin g with the tumblers while in either allocked or unlocked state.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the case of the lock, which may be of rectangular lform 5 Aand B is the bolt, arranged in the usual way, sov as to slide longitudinally in the case A. The bolthas a short bar, O, projecting horizontally from it, as shown in Figs. l and 3. y l v y D represents a swinging plate, one end of which is tted loosely on a pin, E, in the case A, the plate being allowed to work freely on the pin. The plate D at its outer end-that is to say, the end opposite to the one where the plate is tted on the pin E-has an opening in it, the edges of which have three distinct curves, a b b c, as shown clearly in Fig. 1. The upper curve, c, is a part of a circle quite large in diameter. The curves b b', which are at the ends of a., are parts of quite small circles, and the curve c, which is at the lower part of the opening, is a part of a circle considerably larger than those of the curves vb b', but not so large as that of the curve a.

Iny this opening of the plate D an arm, F, which projects from the knob-arbor G, Works, said arm having a frictionroller, d, in its outer end, which acts against the curved surfaces a b b of the opening in the plate D. The arm F ha-s a projection, e, which extends through the opening in the plate D, and acts against the edge of an opening,- G', in the bolt B, for the purpose of sliding or shooting the latter back and forth to lock and unlock the lock.

In order to avoid confusion, we will proceed to describe the operation of the knob-arbor upon the bolt B and swinging plate D, before giving a description of the other parts of the lock.

Yhen the bolt is in a locked state, the bolt B being shoved outward from the lock to the extent of its movement, as shown in black in Fig. 1, the friction-roller d of the arm F is in the curve b ci' the opening of the plate D, and the latter is depressed or forced down to the extent of said movement by a spring, H, which is attached to the plate D and bears against the upper part of the lock-ease. (See Fig. 1.) The short bar C on the-bolt B serves as a stop for the plate D, determining the extent of its downward movement, the bar O passing through a slot, j', in the plate D. By turning the knob-arbor GV in a direction from left to right, as indicated by the arrow 1, Fig. l, the roller d will bear against the curve a of the opening in the plate D, and throw upward or raise said plate, while the` projection e of the arm F of the knob-arbor will, when the plate D reaches its culminating point, which occurs when the roller d reaches nearly the center of the curve a, strike against the part g of the opening G in the bolt B, and throws the latter back, so as to unlock the lock, as indicated in red outline in Fig. l. The roller d, in moving over the curve a., keeps the plate D in an elevated state until the bolt B has completed its backward movement, and at the termination of said movement of the bolt the roller d arrives at the curve b. Dur in gl the shoving out of the bolt B, or the'locking of the lock the arbor G is turned from right to left, as indicated by the arrow 2, the plate D being elevated as before, and the roller d striking against the left side, 71., of the opening G in the bolt B. The curve c, it will be seen, prevents the plate D interfering or coming in Contact with the knob-arbor F while the former is being raised or elevated. I represents a series of tumblers, which are placed on the pin E at about their centers, and work loosely thereon like the plate D. These tumblers I have each a spring, t', attached to them, said springs bearing against apin,j, on the plate D, and having a tendency to keep the upper edges of the tumblers in contact with a stop,j', attached to the plate D. (See Fig. l.)

The ends of thetumblers I, near the opening in the plate D, in which the roller d. works, are slotted longitudinally, as shown at l, and

at the inner end ot' each slot lthereis an open-- ing, m. The slots l are sufficiently wide to admit of the bar C of the bolt B passing through them into the openings m, and the openings m are sufciently wide to admit of the tumblers I working on the pin E to arequisite extent when the bolt B is shoved hack and the bar C is within the openings m.

The ends ofthe tumblers I, opposite to the tnds in which the slots l are made, are each provided with a pendant, J, and these pendants work in a slot, fn, made inra bar, K," secured permanently in the lock-case.

The slots Z in the tumblers I are in dierent positions when the lock is both in aloeked and unlocked state, and in order to lock `and unlock the lock it is necessary that the tum blers I be so adjusted as to bring the slots l in line with each other, in order to admit the short bar (l of thebolt B to pass through them, and thereby allow the bolt to be moved back and forth. Theadjustment ot the tumb.ers I to effect this result is effected through the medium of a key, L, constructed by having a series of notches, o, made in one edge of a fiat metal plate, said notches being of varying depths corresponding to the ditt'erent positions otthe slots Z in the tumblers I. This key, when the lock is to be locked or unlocked, is fitted in the slot n in the bar K, and underneath the pendants J ofthe tumblers I, and when the key is thus adjusted the knob-arbor G is turned and the plate D raised, and the tumblers I moved so that the pendants J will be pressed down upon the notched edge of the key, and the tumblers thereby adjusted so as to bring their slots l in line with each other, and the bar C of the bolt B by the time the roller d acts upon the bolt to move it.

Thus it will be seen that by turning the knob arbor G the tum blers I are adjusted in proper position to admit of the sliding ot' the bolt, and the bolt operated whenthe tumblers are properly adjusted.

When the lock is in an unlocked state, the barC is within the openings m of the tumblers, audit is at the outer side ot' them when the lock is in a locked state or the boltshoved outward.

The upper edges of the tumblers l', directly above the pendants J, bear against a stop, M. (Shown clearly in Fig. l.) This stopeti'ectually prevents the tumblers being operated upon or tampered with by instruments in order to ascertain the position ot' the slots l'. This is the means usually resorted to by burglars in order Pto pick locks. They move the tumblers separately, and by a gentle pressure of the bolt, or some part connected therewith, againstthe slotted endsv of the tumblers ascertain the position of' the slots, and then construct a key that will suitthe lock. The stop M, however, prevents the tumblers I being shoved upward, and they cannot be drawn downward, as the pendantsJ are inaccessible to any tool that would answer for that purpose.

If the plate D be slightly raised, so as to throw the ends of the tumblers I'underneath the stop M downward sutticiently far `to allow the tumblcrs to be moved or worked any material distance, the pendants J will be forced so far down into the slot n before the bar G` can act upon or press against the tumblers that a tool cannot be inserted into the slot n.

By this arrangement the construction of burglar-proof locks is greatlysimplitied. There are no parts liable to get out of repair or become deranged by use, and the lock may be. constructed at a very moderate cost. The heyhole also in consequence ot' being a quite narrow slot, does not admit of powder being introduced in sutlieient quantity to blow off the lock.

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

The tumblers I, provided withthe pendants J, in combination with the plate D, bolt B, and kuobarb0r G, all arranged to operate in the manner substantially as and for the pu pose herein set forth.

GASPAR JAGY. FRED. DENZLER.

Witnesses:

J. ROMAINE BROWN, Jr., FRED. DENZLER, J oHN R. LIvtNGsroN.

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