US298136A - vassae - Google Patents

Description

(Model.) Y

A R. G. VASSAR.

ALARM LOCK.

N0.298,136. Patented May 6, 18784.

N. para mummy mmm nc.

rArmar. Orricni. l

ROBERT G. VASSAR, OF NEV YORK, N. Y.

ALARM-LOCK.

SPECIFICATION forming part of Letters Patent No. 298,136, dated May 6, 1884.

Application filed May 18, 1883. (Model.)

.To a/ZZ 1,071,071?, it may concern:

Be it known that I, Ronin. G. VassAR, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Door-Bolts, of which the following is a specification.

My invention relates to door-bolts; and its object is to so construct the same that when the bolt is shot it cannot be operated so as to unlock the door by the means of any tools or instruments inserted from the outside.

To this end my invention consists inA the combination,with a door-bolt, of a spring which tends to throw the bolt back when it is-shot to lock the door, anoperating thumb-piece or slide detached from the bolt, and so arranged that it may be brought against the bolt `for throwing it to lock the door, and a suitable automatic sliding catch, which engages with the bolt automatically to hold it when it is shot, but which may be operated from the inside of the doorto release the bolt and allow it to be thrown back by the action of the spring.

My invention consists, further, in certain specific combinations and details of construction, that will be specied in the claims hereto annexed.

My invention is designed more particularly for use with the automatic alarm described in a prior application iiled by me, in which application I have described the bolt and alarm as so combined that the latter will be released and sounded upon the movementof the bolt sidewise, consequent upon the impingement of a tool upon it, or of pressure upon the door, upon an attempt to open it by any unauthorized person.

In the accompanying drawings, Figure 1 is a front view of the bolt-casing. Fig. 2 shows the top plate of the casing removed to expose the interior mechanism. Fig. 3 is a longitudinal cross-section on the line 3 3 of Fig. 2.

A indicates the casing of the bolt, and A2 the plate upon which the bolt and its attached `parts are mounted, both plate and casingbethe ,inside of a door. C indicates the bolt proper, which works through a guide-piece, C, and is provided with a coiled'spring, C3,

abutting at one end against a collar, (3*, on the bolt, and at t-he other against guide C2, so that raised surface on plate A2, assists in guiding- D3 indicates a retractingspring that serves to return the slide D to its normal position. Formed in plate I is a slot pr recess, I2, with which an automatic sliding catch-bar, E3, engages when the bolt is shot.. The barll.3 works in a guide-slot formed in a 'raised portion of Vthe base-plate A, and is provided at its upper end with a pin or projection, j, with which engages a spring, J, that tends to lift the catch or slide bar E3. A step or rabbetis formed on E, at e, to engage in slot I2. E indicates a small knob,working in a slot in the casing, and

`having a rounded or beveled head upon the outside of casing A,`and also provided witha spindle or stem, E2, that passes into a slot in E, so that -Eamay be drawn down against the action of the spring J. Vhen the bolt is shot by theslide D, the catch-bar FP engages autoL matically with the slot I2, and locks the bolt 'from backward movement under the action of y When it is desired the compressed spring G3. to unlock the door, the button E is moved downward, thus releasing the bolt when the spring C will throw it back. rIhe button E,

havinga rounded surface, cannot be operated by a wire or other instrument inserted from the outside of the door, nor can that bolt be subjected to any retracting force through slide D, since the same v only engages with the bolt in such a way as to enable the bolt to be shot to lock the door.

I have lherein shown the bolt as combined with an automatic alarm that will be set oft in case the bolt be moved laterally against the force of a spring, K, secured to the bolt, and resting against the inner surface of the plate A. The alarm mechanism does not differ materially from that described in a prior application for patent liled by me. The essential parts thereof are as follows:

II is a spring detent-arm upon the arbor of the mainspring-wheel G,and O is acatch-plate having a step or catch at h., with which the spring-arm engages and is locked when the alarm is wound up.

F is a handle or arm upon the outside of the casing, which is secured to the saine spindle as H,and serves to wind up the alarm mechanism. A plate, M, pivoted to plate O,allows the detent-arm II to pass in the act of winding up the mechanism, but when the mechanism is wound up will also permit the arm to springinto engagement with the step h. rIhe plate M has a curved edge, as indicated, and a spring, S, which Vlends to throw said plate against the stop N, and into position where,when the deteut is re leased and begins its retrograde movement, said detent will slide over such curved edge, and will pass the step h without engaging with the same. The bolt C, or the rearmost portion, I, is capable of a slight lateral movement, and when the boltis shot a raised portion, L,ol" the plate I is in position to engage with the springarm H and release the alarm mechanism in ease any lateral movement should be given to the rear portion of the bolt, either by the insertion of a drilling-tool or other instrument by any unauthorized party, or by an attempt to open the door when it is bolted.

G is the escapement-wheel ofthe alarm mechanism,which serves to impart movement to the bell-hammer Bt in the ordinary way, while B indicates the bell, mounted on plate A2 in position coincident with an opening cut in the top plate, A, so as to allow the sound tomore readily escape.

G Gz indicate the well-known device of a Geneva stop to prevent overwinding of the driving-spring for the alarm mechanism.

I do not limit myself to any particular construction ot' catch or lock for automatically engaging with the b olt when it is thrown to lock the door, as many others may be used in place of that shown for accomplishing the same purpose-viz., the automatic detaining of the bolt i after it is 'thrown to prevent it from being thrown back by the action of the spring or rotractor until the catch is removed from engagement with the bolt by the slide button or knob E, or other means within the control only of some authorized person. It would be within my invention to attach the slide D D2 to the bolt or an extension, j; butIgenerally prefer not to do this, as it would afford a means whereby the bolt might be subjected to a strain by a tool inserted through the door for the purpose of unlocking it.

I am aware that a bolt having a spring which tends to throw it back and a catch for releasing the bolt, so that it can be retracted by the action of the spring, is not broadly new.

vVhat I claim as my invention isl. rIlhe combination, with the sliding bolt C and its retracting-spring,ofthe automatic sliding` catch for holding the bolt, and the rounded head or button E for the catch, projecting through the casing and nearly ilush with the outer surface ol' the casing, as and i'orthe purpose described.

2. rIlhe combination,with the bolt and its retractor,ofa detached operating-slide or th u mbpiece arranged to engage with the bolt to throw it against the stress of its retractor, but not capable ofcatching upon it inthe opposite direction, and an automatic catch for engaging with and holding the bolt against its spring, as and for the purpose described.

3. The combination ol' bolt C, spring C, sliding catch E, spring J, and rounded button E,

having siem or spindle Eicngaging with slide ROBERT G. VASSAR.

Witnesses:

Trios. TooMEY, WM. H. BLAIN.

Images