US62545A - Frank f - Google Patents

Description

@geiten iftatee liatrnt @fitta Letture Patent No. 62,545, dated .March 5, 1867.

IMPItUlEll/IENT IN DOOR LGKS.

@In Stimuli nicht n in tjrs@ lrttcrs ntnitimt making pint nt tige time.

TO ALL WI-IOM IT MAY CONCERN:

Be it known that I, yFRANK F. LANDIS, of the city of Lancaster, in tho county of' Lancaster, and State ot' Pennsylvania, have invented a new and improved arrangement in the manufacture of a Burglar-Proof Lock and Latch combined; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a view of the interior parts of the lock; the covering pla-tn.

Figure 2, being removed.

Figure 3 shows the several parts in detail- I. The key 0, with its wingN, and pins, a n, on both sides;

II. The under side of the kmain bolt B, with its lock flange K, spring-pin L, and lugs M, on its forked terminus;

III. The twin-bolts C D, on their pivot F, and the double spring E, on the pins e e, and in contact with the up'per heels on the twin-bolts;`

IV. The key-guard, Jj, showing the headed pins e e; v

V. The dead latch and open latch foot bolt G, on its pin, surrounded by a coiled spring, 7L.

Figure 4, the front edge ofthe lock, with the turning knobs in place.

The object of this invention is to supply a lock and latch in one, applicable for a right or left-hand door; and when locked, to prevent it being unlocked with any other but the proper key, expressly made for it; and the liability of takingr a cast for a false key, or of picking the lock by any means, prevented; and again, securing it in such a manner on the inside that the door cannot be unlocked from the outside with the proper key itself; hence, it is emphatically burglar proof.

To enable others skilled in the art to make and use my invention, I will proceed to described its construeA tion and operation.

In the box and knobs, with the square shank and tumbler, there is no 4special novelty; the main bolt, B, with its `bifurcation and luge, M, operated by the knobs and Wings t of the tumbler T, in the ordinary mannerL It has, however, a pin Il, to whichV a spiral spring, S, from a peg, s, on the lock, (or inner side of the casing plate A,) forms a connection and draws the bolt forward to lock or simply latch the door, after being turned back by the knob, in order to open the door. So far it is an ordinary turn latch. This bolt, B, has a side flange, K, which, with the spring peg Ir, rests upon the base of the casing, as also the thickened head of the bolt, leaving a space between the bottom of the casing plate A and bolt B, partially' covering the horizontal twin-bolt, C D,/on their pivot Ff I/art III, lig. 3, shows those twin-bolts, one on top of the other, with their widened anges resting upon the guard-chamber J with their lower limbs, while their upper limbs are acted against by a double spring, E, on the ends :c y, andl held in place. Each of said twin-bolts hasialso a foot, c d, Which-'rests upon the double inclined head II of the thuu1b-lever G, with its spiral spring L around the pivot or pin on which it mores. The guard-chamber Jj completely encloses or surrounds the key-hole, `admitting no access to the interior of the lock except by two small holes drilled through the thickened top. Into each of these holes a headed peg, e z, is inserted, directly underneath the ilanges C D of the twin-bolts, each onerespectd ivcly, and acting independently or simultaneously in raising one or both. False holes may also be drilled to deceive in the attempt to take a cast. The pins, 1t fa, on the key O, must be of'the exact length and position to match the holes for the headed pins e Z, so as to raise them so high only (both simultaneously) as to' allor.u the flange K, on the main bolt Il, to slip through betwcenthe footed legs et' the twin-bolts; otherwise, il' raised too high, the ilange will strike the lower or inside shoulders :t 1/ ofthe lower leg on the twin-bolts, as it does the upper inside shoulder on the` upper legs when they rest upon the 'op of the guard-chamber J. vThe door would necessarily be again locked the moment the key is withdrawn, or itv action closed. So also with the knobs, which must be employed jointly with the action ofthe key, to turn thc bolt back when the twinbolts are in position to admit of the passage ofthe ilange K between their forked and footed ends a: Duringr the day, when it is desirable to usc it as a latch only, then the twin-bolts are raisca by the thumb-lever G, by thc action of the double inclined plane H against the under side of the feet c (Z, one foot on each of Said twin-bolts of uniform size, operated in unison. In this position the bolt can be turned back, and the inclined plane, w u', on the jam-plate or box W, fig. l, will allow the door to be closed by a simple push or pull, as any ordinary latch,

I have also introduced an additional security in case the key is lost or stolen, to prevent the door from `being unlocked with it from the outside, which consists in a thumb-lever, U, on a pcg and spring, to keepit in place. This has an interior hook end, made to press upon the prolonged flange D of the under twin-bolt, and confines it to a position that will el'eetually prevent the action of the bolt by .either the key or other thumb-lever G, or turn handles, and is only used at night, or when desired for special reasons.

I um aware that numerous devices are in use and patented, separatelyrconsidcred, embra sing-similar features, variously combined and modified, therefore I do not/deem. it safe to claim any one thing or part exclusively. Nor would I confine myself to horizontal twin-bolts, asI have also invented a lock in many respects similar, having-vertical twin-bolts, being, however, more diicult to it up. I have improved my former lock in the manner herein presented, which has many advantages over the former.

What I claim as-my invention, and desire to secure by Letters Patent, is l 1. I claim the two-legged twin-bolts, one up'on the other, held by' a pivot, F, each 'ha-ving a raised flange, C and D, and projecting feet, and y, and c and d, in combination'with the double-noting spring E, all arranged in the manner and for the purpose specified.

2. I also claim the guard-chamber Jj, surrounding the key-hole, with its perforations for the headed pins z z, in combination withv the flanges C and D, on the lower leg ofthe twin-bolts, arranged and operating in the manner and for the purpose specied. i

3. I-also claim the twin-holt fastener or lever U, in combination with the prolonged flange D on the lower twin-bolt, when applied in the-manner and for the purpose set'forth.

4. I also claim the construction of" the key N, with its projecting pins n n, in combination with the headed pins 2 z, and guard-chamber Jj, all arranged and operating in the manner specified.

- FRANK F. LANDI'S.

Witnesses:

WM. B. WILEY, JACOB STAUFFER.

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