US397838A - Electric signaling and alarm apparatus - Google Patents

Description

(No Model.)

W. L. DENIO.

ELECTRIC SIGNALING AND ALARM APPARATUS. No. 397,838. Patented Feb. 12, 1889.

WITNESSES, L/VVEJV'TOR, zgfluahzpa/zz 2 M A; flttorney UNITED STATES PATENT \VILLIAM LIVIXGS"ON DENIO, OF ROCHESTER, NEIY YORK.

ELECTRIC SlGNALl-NG AND ALARM APPARATUS.

SPECIFICATION forming part of Letters Patent No. 397,838, dated February 12, 1889.

Application filed December 1, 1887- Serial No. 256,653. (No model.)

To aZZ whom it may concern.-

Be it known that I, \VILLIAM LIVINGSTON at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Electric Signaling and Alarm Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an automatic firealarm in which the meltin of a seal fusible at a detinite temperature higher than normal will change the connections of an electric circuit, so as to transmit an alarm-signal to some point or station from which preventive measures may most speedilyan d certainly proceed.

The object of the invention is to produce a fusible seal which, in addition to its capability for use in new plants whereany desired arrangement of wiring may be adopted, willbe adapted for use in existing systems without alteration of the connectionsas, for example, in hotels, where an annunciator is already in use, and it is desirable to have a fire-detective which may be attached to the circuitclosers or push-buttons in the various rooms 1 without difflculty.

To these ends my invention consists in a heat-detector adapted to be used in the ordi- I nary push-button in lieu of the push com- In putting my invention into practice I a make a barrel, 5, of metal or other suitable re- DENIO, a citizen of the United States, residing sisting material, the integrity of which will not be affected by moderate heat, with an internal flange, 9, near its one end and an external nals or electrodes 3 l.

monly used therein, which serves the dual j purpose of acting as the push or button and of automatically turning in an alarm on the outbreak of a tire or a detinitc rise in temper ature.

My invention embodies, also, certain feadefinitely indicated in the appended claims.

In the accompanying drawings, which illusl 3 spring-electrode.

flange, 12, and internal rabbet in said flange at the other end. A spiral spring is placed in the barrel and seated against the flange 9. A pin, 7, is then thrust through the spring. The pin is provided with a head, 11, of sufficient diameter to enter the rabbet in the externallyflanged end of the barrel, and the pin is sufficiently long to project partially or entirely through the orifice in the internal flange, 9,01. the barrel. The spring, of course, must be 01' sufficient length to be under compression when nested in the barrel. \Yhen the parts have been assembled, the pin 7 is secured in place by soldering to the barrel and flange, as shown at- 8, Figs. 9 and l. The solder I use for this purpose is one which will fuse at a comparatively low temperatureat 160 Fahrenheit, for instance. By varying its composition it may be made to fuse at a higheror lower temperature, as is well understood in the art. The detector is then completed, and may be supported in position in suitable relation to any pair of circnit-terminals. In Figs. 2 and 1: it is shown mounted in the ordinary push-button. These buttons, as shown in Fig. 1, consist of a base, 1, provided with circuit termi- Over the base fits a screwcap, 2, which is provided with a flaring orifice, in which a flanged porcelain knob is placed, the flange of the knob being wider than the orifice and resting on the upper Such circuit-closers are in use in thousands of existing plants in hotels tures of structure, which will be fully de i scribed in the accompanying specification, and

I break of a fire.

and other large buildings. By unscrewing the cap 2, removing the porcelain knob, and sub i stituting for it my detector-I capaeitate such a circuitcloser for giving an alarm on the out \Vhen the air of any room in which the change has been made reaches a predetermined temperature, the alloy melts and releases the pin 7, which is forced out of the barrel by the expansion of the spring 6. The terminals or electrodes 3 and l are thus brought into contact and the alarm transmitted to a central station, where measures can immediately be adopted for extinguishing the tire.

The device is applicable, also, to closed circuits, in which case the flange rests upon the lower spring, as shown in Fig. at.

The detector may of course be used elsewhere than at a push-button. It may be inserted at any part of? an electric circuit, being supported over one of the terminals, so as to force it away from or into engagement with the other terminal, accordingly as the system is closed or open circuit in character.

Having thus described my in ventionavhat I claim, and desire to secure by Letters Patent, is-

.l. A button for eircuit-changcrs laterally extended at one end and containing a spring, a finger pressed by said spring, and a fusible seal normally holding the finger against the tension of the spring.

2. A perforated button for push-buttons flanged at one end and containing a-spring and a finger pressed by said spring, said finger being held under tension by a fusible seal on the outer face of the button, whereby said button may be substituted for the customary porcelain button and automatically transmit an alarm on a definite rise in temperature.

3. In a fire-alarm or heat detector, the combination of a barrel internally flanged at one end, a spring seated against said flange, a pin within the barrel engaging the spring, and a fusible seal for holding said spring under tension, whereby on the outbreak of a tire the seal will melt and the pin will be thrust out of the barrel.

4. The combination, with circuit eleetrmles, oi the barrel 5, provided. with flange 9, spring ti, seated. in said barrel, said springs when free extending out of the barrel, and pin 7, one end ol.- which engages the free end of the spring, the other end being secured bya fusible seal to the other end of the barrel,whereby on the outbreak of a tire the seal will melt and the pin will be thrust out of the barrel and

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