US329253A

US329253A - Island

Info

Publication number: US329253A
Authority: US
Publication date: 1885-10-27
Anticipated expiration: 1902-10-27

Description

(Model.)

0.P.'BA0H.ELDBR.

BURGLAR ALARM. ria-329,253.

v Attorney.:

Patented Oct. 27, 1885.

UNITED STATES PATENT OFFICE CYRUS P. BAGHELDER, OF PAWTUCKET, RHODE ISLAND.

BURGLAR-ALARNI.

SPECIFICATION forming part of Letters Patent No. 329,253, dated October 27,1885.

' Application niet May 1, 1354. serial No. 130,683. (Model.)

To all whom it may concern.- Be it known that I, GYEUs P. BACHELDEE,

- a citizen of the United States, residing in the town of Pawtucket, in Providence county, of the State of Rhode Island, have invented a new and useful Improvement in Burglar- Alarms, of which the following is a specification. l y

My invention relates to improvements in burglar-alarms adapted to be attached to the inside of the door or located within a room, and so connected with the knobspindle of the door that upon said spindle being turned a bell is rung, the object being to provide a catch which can be so fixed as to allow the bell to ring whenever the knob-spindle is turned; to provide improved means whereby said knob may be turned without ringing the bell; and. further, to provide means Which,whcn placed in a certain position, will allow the bell to ring continuously, when the knob is turned, until the force of the actuating-power is eX- pended.

With these ends in View the invention consists in the improved construction and combination of parts hereinafter fully described, and pointed out in the claims.

In the drawings, Figure l is an elevation of a sufficient portion of a door to illustrate the application of my invention thereto. Fig. 2 is a longitudinal vertical section of the device. Fig. 3 is a transverse vertical section. Fig. 4 is a side elevation, and Fig. 5 is a detail view of the yoke or clamp employed for attaching or connecting the alarm with the knob-spindle. Fig. 6 is a detached perspective view of the casing.

In the accompanying drawings, in which like letters of reference indicate corresponding parts in all the figures, A represents a suitable bracket or casing, at the upper end of which is journaled a gear-wheel, B, the shaft a of which is squared at its end to receive a key for turning said shaft, for a purpose which will 45 be explained. Connected with the shaft a is one end of a coilspring, C, which is wound around said shaft and connected with the bracket or casing at its other end. On the shaft a is located a sleeve or tube, b, through 5o which extends the squared end of the said shaft. The said tube or sleeve is interiorly vtends through an opening in the front of the threaded, and fitting upon the same is a bell,

c, which is held in place by a nut, d, open at its end, to allow the insertion of akey for winding the spring. Y On the casing is rigidly mounted upon a shaft, e, a gear-wheel, D, which meshes with the gear-Wheel B. In the sides of the casing, just below the gear-wheel D, is mounted a shaft, C', having near its inner end alantern-wheel, g, which lantern-wheel 6o meshes with the gear wheel D. It will thus b'e seen that if said coilspring is wound up f it will impart motion to the gear-wheel B, whichv will, through the medium of the gearwheel D, impart motion to the lantern-'wheel g and the shaft C. Upon the shaft C is rigidly mounted a spur-wheel, E, which has upon its front face two outwardly-,extending pins, t', located diametrically opposite one an- 7o F/ represents a shaft, which is mounted in the sides of the casing, just below the shaft C. Upon said shaft is mounted a pallet, j, which engages the spur or escape wheel E, one tooth at a time. It will thus be seen that an oscillating isochronous movement will beimparted y to said shaft and pallet. Extending outwardly from the shaft E is a rod, k, having a knob or hammer at its end. Said hammer and rod are so located that when the shaft E is oscil- 8o lated they will be vibrated and the bell rung. E2 represents an arm, whichv is secured by its lower end to the shaft E', said arm being bent at right angles to its body portion, as shown at Z. The bent end of said arm eX- casing, and ts an aperture or opening inv a shifting lever, G, which lever G is pivoted at its upper end to thefront of the casing. The lower of said shifting-lever is bent inwardly 9o and then continued downwardly on aparallel line with the upper end of the said lever, but on a different plane. By shifting said lever one ofthe teeth of the pallet is held rigidly in engagement with the teeth of the escape 95 wheel, and prevents the same from turning.

H represents a pivoted stop, which consists of a strip of metal substantially L shape in form, having its free end turned inward, said free end being adapted to bear against one' of 100 the pins t', located adjacentthereto. A spring, m, is attached to the said stop at one end and to the door or other object to which the alarm may be attached at its other end, thus holding said stop in place.

Irepresents a wire, which is attached to the Stop at its upper end, the lower end of said wire being connected with chains o, which are attached to the clamp or yoke upon the knobspindle on opposite sides of the vertical center of the saine, so that when said knobspindle is turned the stop through the connecting means described will be lowered and release the pin t'.

The operation is a follows: rlhe spring is wound by turning the shaft a', and the gearing prevented from turning by the pivoted spring-actuated stop H, engaging one of the outwardly-extending pins of the eseapementwheel. Then the knob is turned in either direction, the said spring actuated stop is moved from engagement with said pin, and the gearing is set in motion by the force of the spring,thus imparting movement to the palletshaft and pallet, thereby causing the bell to be rung by the hammer connected with said pallet-shaft until the opposite pin of the escapement-wheel comes into engagement with the stop H. rlhis is caused by the knob being released; but should the knob be held in a turned position the alarm will be :rung until the force of the actuating-power is expended. For allowing the knob to be turned without ringing the alarm, the end `oi' the shifting lever which works in a vertical slot, a, in the cover p is depressed and moved into a seat, q, of said cover.

rlhis movement of the shifting lever causes the same to come in contact with the arm E2 on the pallet-shaft, and thereby holds one of the teeth of the pallet in engagement with the escapement-wheel, and prevent-s the same from being turned. It will thus be seen tnat when the knob is turned it will have no other effect upon the alarm than to remove the stop H from engagement with the pin of the escapement-wheel; but as said wheel is locked by the pallet it will be seen that as soon as the knob is released said stop will be forced into engagement with said pin by means of the spiral spring. To allow the alarm to ring continuously, when the knob is turned, until the force of the actuating-spring is expended, I provide a wire arm, K, having ashoulder, r, formed by bending said arm, said shoulder being located just below the upper face of the pivoted stop H, said arm being pivoted at its upper end, its lower end extending downwardly through a slot or opening in the cover, which slot or opening is cut away to form a shoulder, s. Vhen it is desired that the alarm shall ring continuously, the arm is depressed and moved into the recessed portion of the slot, and bears against the shoulder. As soon as the knob is turned, it lowers the pivoted spring-actuated stop, which is engaged by the shoulder on the spring-arm, which holds the said lstop from engagement with the pins of the escapementwheel, thus allowing said wheel to turn until the spring is run down.

It will be seen from the above description that by the use of my improvement the alarm may be so arranged that the door can be opened without operating the same; that the alarm can be so adjusted that it will ringv while the escapement-wheel is making onehalf of one revolution, or that the bell may be allowed to ring continuously until the force of the spring-actuating power is expended.

The alarm above described is simple in its construction, easily applied, effective in its operation, and can be supplied at a comparatively slight cost.

Having fully described my invention, what I claim as new, and desire to secure by Letters l. In aburglar-alarm,thecombination,with a spring-actuated train of gearing, of a shaft, having an eseapement-wheel mounted thereon, apallet to engage said escapement-wheel, outwardlyextending pins on the esca-pementwheel, a pivoted spring-actuated stop, and a pivoted shouldered arm for engaging said stop, substantially as set forth.

2. In a burglar-alarm, the combination, with a spring-actuated train of gearing, of a shaft carrying an escapement-wheel, a shaft carrying a pallet to engage the eseapement-wheel, an angular arm projecting from the palletshaft, and a shifting lever to engage said angular arm, whereby the alarm may be rendered inoperative, substantially as set forth.

CYRUS l?. BACH ELDER.