US1056638A - Thermostat. - Google Patents

Description

W. W. DEA1\L THERMOSTAT.

APPLICATION FILBD MAY 29, 1905.

1 956,638, Batenzed Mai: 18, 1913.

. two foreach ear.

UNITED STATES PA lEN T OFFICE.

WILLIAM W. DEAN, OF ELYRIA, CHIC, ASSIGNOR TO THE CONSOLIDATED FIRE ALARM COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

THERMOSTAT.

Specification of Letters Patent.

Patented Mar. 18, 1913. Application filed May 29, 1905.

Serial No. 262,915.

1'o all w/ wm it may conccm Be it known that I, VV1LLIAM W. DEAN, a citizen of the United States, residing at Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Im rovements in Thermostats, of Which the foll%wing is a specification, referenoe being had therein to the accompanying drawing.

y invention relates to thermostats and released. more especially to the open circuit class. It Wlll be evi dent that the spiral spring The object of the invention is to providea may be placed in the depressed portion of thermostat for automatic electric fire alarm one to Which systems, Which will be reliable, efficient and positive in action.

the opposite member from the it 15 110W shown attached.

As Will be seen by inspection of Fig. 3 the.

A further object is to se construct the members 3 and 4 are normally separated thermostat that there Will be no danger of from each other. VVhen, however, the teman accidental alarm being sounded, Therperature in the room in which the thermomostats with their movable parts composed stats are located rises above a given degree, of metals having ditterent coefficients of eX- the metal on the inside of the terminal mempension are difliult to keep in adjustment, bers fuses and releasesthe spring so that it- Will contact with the opposite terminal mem bers and thoroughly incorporate itself in the now soft metal 11. This action will close the circuit and ring the alarm.

Having thusdescribed my invention what I daim and desire to secure by Letters Patent is:

1. In a thermostatic circuit doser, the combination with a pair of circuit terminals having anarrow space between them, of an insulating ring normally separating said terminals, a tapered spiral spring between the terminals and having a tendency to rise in conical form to itself connect the two ter minals and means normally holding said spiral spring pressed with all of its turns in the same plane on one of said terminals, said holding means being adapted to release said spring upon being subjected to a predetermined temperature.

2. In a thermostat, the combination with two fixed contact members one of which is provided with a raised portion, the other of Which is provided with a depression, of an and liable to sound accidental alarme by reason of vibrations caused by shock or otherwise.

Further objects Will appear as the specification is read in connection with the acompanying drawings.

The invention consists in the novel features and combination of parts which Will be described hereinafter and partieularly pointed out in the .appended claims.

In the drawings, Figure 1 is a top perspective view; Fig. 2 a bottom perspective view;.Fig. 3 a longitudinal section showing the spring contracted; Fig. 4 a detail perspective of the insulating member; and Fig. 5 is 9. section similar to Fig. 3 but showing the spring distended and the metal retainer fused, etc.

Referringto the drawings, 1 represents a suitable insulating base or plate Which is provided on its upper side with spacing lugs 2 adapted to keep the device a sufiicient distance from the ceiling or Wall. Secured to each side of the insulating latte 1 are termina] members 3 and 4, the ormer of Which insulating plate separating said members, is provided with a depressed central portion fusible material connected to each of said 5 and the latter of which is provided with a members, a spiral spring normally held comraised central portion 6. Each of these pressed in the fusible material of one of said members 3 and 4 is provided with. cars 7 to members but adapted to be releasedupon a which are secured the usual binding posts 8, temperature sufficient to fuse said material The terminal member 3 is and to Incorporate itself in provided with a spiral spring 9 of conical the fusible maformation which is held collapsed upon the 3.

formed by the depression The spring raised portion 10 5), by an easily fusible metal 11 a plurality 'of terminal and fiat on one of said plates but terminals, fusible conducting material on both of said terminals and a spring embedded in said fusible material on one of the terminals and adapted at 1 predetermined temperature to be release an effect contact with the other terminal.

7. A thermostatic circuit closer comprising a pair of circuit. terminals, an insulating plate separating said terminals, fusible conducting material on each terminal, and a spiral spring normally held compressed upon normally separate said members, and pr0- separating said vided with an aperture, lugs on said plate adapted to space the plate away from the support on which it rests, fusible material on said members, and a spiral spring embedded in the fusible material on one of said members and adapted to bridge and connect said members through said aperture when released from the fusible mate rial.

4. A thermostatic circuit doser compris ing independent terminal members having a narrow space between them, insulating means holding said members apart from each other, and a conical spiral spring between the membersnormally held fiat against 011e member by fusible means embedding its coils, but adapted to be released at a predetermined temperature and thereupon to project its coils in conical shape so as to itself electrically connect the members.

5. A thermostatic circuit closer comprising independent terminal plates having a narrow Space between them, an apertured insulating disk separating said plates, and resilient means normally held between them adapted at a predetermined temperature to be released and to expand perpendicularly so as to itself one terminal by said fusible mater1a, adapted to be released at a predetermined temperature and thereupon t0 malte contact with the fusible material upon the other terminal.

8. In a thermostatic circuit doser, the combi nation with a pair of parallel disk terminals of relatively thin metal, insulating material spaCihg said terminale apart, and forming an inclosed chamber between them, fusible material in a thin layer on the inner face of one of said disks, and a spring confined by said fusible material and adapted to effct contact with the opposite disk termina In testimony whereof I afiix my signature in presence of two witnesses.

I WILLIAM W. DE AN.

brid e said plates through the aperture in the isk. VVitnesses:

G. A thermostatic circuit doser, compris SIDNEY A. BEYLAND, ing two circuit terminals, insulating means M. E. MIZER.

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