US591143A - Heat-detector - Google Patents

Description

(No Model.)

H. RUETSGHI.

HEAT DETECTOR.

N0. 591,143'. Patented Oct. 5,1897.

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HEB Q IANN RUETSGHI,

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NITED STATES PATENT OFFICE.

TIERMANN RUETSCI-II, OF NEWVARK, NEW JERSEY.

HEAT-DETECTO R.

SPECIFICATION forming part of Letters Patent No. 591 ,143, dated October 5, 1897.

Application filed March 25, 1897.

To aZZ whom it may concern.-

Be it known that I, HERMANN BUETsoHr, a citizen of the United States, and a resident of Newark, in'the county of Essex and State of New Jersey, have invented a certain new and useful Heat-Detector, of which the following is a specification.

My invention has reference to improvements in that class of circuit-cl0sers in which contact is made or broken by excessive heat, and a consequent rise in temperature, by the sounding of an alarm arranged in the circuit in which the circuit-closing device is placed.

The main object of my invention, therefore, is to provide a device of this nature to be used as atemperature-indicator, serving, for instance, when-there is a rise in the temperature caused by a fire in the building as an automatic indicator to warn the person or persons in the building by the sounding of an electric alarm-signal.

The device is also designed foruse in greenhouses, incubators, 850., or in factories, where an even temperature is required, the device serving as an automatic indicator to give notice when the temperature is above that desired.

A further object of the invention is to provide in connection with the apparatus a simple means for rendering the device adjustable for the purposes for which it is intended.

The invention consists in the improved circuit-closer hereinafter set forth, and also in the novel arrangements and combinations of the several parts more fully described in the accompanying specification and finally embodied in the clauses of the claim.

The invention is illustrated in the accompanying drawings, in which Figure 1 is aview of the device inclosed in an ornamental casing, illustrated in a circuit containing a battery and an electric alarmbell. Fig. 2 is a face view of the circuitcloser, the said ornamental casing being removed to more clearly show the arrangement of the several parts of the device. Fig. 3 is a side view of the device, and Fig. 4 is a longitudinal section taken on line 4 4c in said Fig. 2. Fig. 5 is an end view of the device; and Fig. 6 is a cross-section of the same,taken on line 6 6 in Fig. 4.- Fig. 7 is aperspective Serial No. 629,270. on model.)

View of a spring employed in connection with the device provided with a contact portion which causes the circuit connected with the device to be closed when there is an excessive rise of temperature.

Similar letters of reference are employed in all of the above-described views to indicate like parts.

In said drawings, A indicates the contact or circuit-closer, provided with a suitablyornamented cover I), of metal or any other suitable material, provided with perforations or holes, as Z), to permit the heat to more quickly come in contact with the operative parts of the circuit-closing device within said casing. The said circuit-closing device proper consists, essentially, in the arrangement of two parallelbars a and a, of wood, slate, or any other desirable material, which may be provided with suitable openings, as a Said bars a and a are placed side by side in such a manner as to form a longitudinal space a between them, which is formed by the arrangement of metallic plates or blocks 0 and c, secured between said bars at or near the ends thereof by means of suitable screws 0 as clearly shown in Figs. 4: and 5. Said bars a and a are secured together, with the said metallic plates or blocks 0 and 0 between them, by means of the screws a and a are the screws for securely attaching the device to the ceiling or wall of a room or in any other place where the device is to be put up.

Each plate or block 0 and c is provided with a suitable hole in which I arrange the ends d and d of a very fine wire d, of any suitable metal, having great strength and capable of ready expansion when exposed to an ordinary rise in the temperature, which wire when suitably stretched is secured in said holes in the said plates or blocks 0 and c by means of suitable set-screws 0 To prevent the points of said screws from cutting or breaking the ends of the said fine wire (1 when the screws are firmly screwed down, I may arrange in said holes in the plates or blocks 0 and c in position between the fine wire (1 and the ends of the screws small pieces or plates, as c, which act as protector-plates against the action of the screw-points against the fine wire.

As will be more especially seen from Fig. 6, the bar a of the deviceA is provided at its central point with an electric contact or post c and screw 6, adapted to receive the other end of the circuit-wire g, in which I have arranged a battery 9 and an electric alarmbell 9 as clearly illustrated in Fig. 1.

In an opening a in the bar a I have arranged a contact-screw h, which is screwed into the post 0, as shown in Fig. 6, and in an opening a in the bar a is a screw 72 which screws into the back of the post 6 said screws 7L and 7t respectively securing said posts 6 and e in their operative positions on the bars a and a, substantially as illustrated. (lonnected with the said screw it by means of a loop or eye 2" is a suitable contact-spring t, preferably made of phosphor-bronze, provided with a coil 1' and an arm i said arm having a flattened end i, which is preferably provided with a platinum contact '6 Said flattened end i is bent at a suitable angle, as at i, and has a hole or perforation i, through which the wire d passes, as clearly illustrated in Fig. i.

Extending from one side of the contactpost c to a point directly above the flattened end i of said spring 1' is a bar 6, and in a screw-threaded hole in said bar is an adjustable screw a which acts as a contact, and preferably has a platinum contact-point on its free end. lVhensaid portion 1' of the spring 2' is in contact with the end of said screw c then a complete circuit will be cstablishcd through the several parts of the device A and the circuit g, whereby an alarm will be sounded by the electric bell as will be clearly understood.

Under normal conditions the wire cl is contracted and very taut, and the wire passing through the perforated end 2' of the spring 1' said end of the spring will be out of electrical contact with the screw 0 and the main circuit will of course be broken; but as soon as there is an increase of temperature the wire (Z will expand, which allows the coils i of the spring 'i to act and bring the contact portion of the end i" of the spring 1' into operative electrical contact with the screw 0', with the result hereinabove mentioned.

The operation of the parts is clear and very simple, and a circuit-closer is the result which is very useful for many purposes.

Of course it will be understood that the device can be made to work at different temperatures by means of the regulating-screw c, which can be brought farther away or closer to the contacting surface of the spring 'r' by turning the screw in said bar c, as will be clearly understood.

Having thus described my invention, what I claim is- 1. Theherein-described circuit-closer,comprising, in combination, with an open frame, a fine metallic wire stretched in said frame, a pair of electrical contacts in said frame, and a spring in said frame, said spring having a perforated contact end portion, through which said wire passes, to normally force said spring out of contact with one oisaid electrical contacts on said frame, substantially as and for the purposes set forth.

2. The herein-described circuit-closer,eomprising, in combination, with an open frame, a fine metallic wire stretched in said frame, a contact-post e, a screw it connected with said post, a spring in said frame, said spring hav ing a perforated contact end portion, through which said wire passes, and a contact-post and a contactscrew, with which said spring is adapted to make contact, substantially as and for the purposes set forth.

3. The hereiirdescribed circuit-closer,comprising in combination, with a pair of bars a and a, metallic blocks 0 and 0' between said bars and a fine wire connected with said blocks, a pair of electrical. contacts, one on each bar a and a, and a spring connected with one of said bars, said spring having a perforated contact end portion,through which said wire passes, to normally force said spring out of contact with one of said electrical contacts, substantially as and for the purposes set forth.

. l. The herein-described circuit-closer,eomprising, in combination, with a pair of bars 1/ and a, metallic blocks 0 and 0 between said bars and a fine wire connected with sai d blocks, a contact-post c on said bar a, a screw 71. connected therewith, a spring connected with said bar (4, having a perforated contact end portion, through which said wire passes, a contact-post c on said bar a and a contactscrew 0 with which said spring is adapttal to make contact, substantially as and for the purposes set forth.

5. The herein-described circuit-closer, con sisting, essentially, of a pair of bars a and a, metallic blocks 0 and 0' between said bars, a fine wire connected with. said blocks, and a spring 1' between said bars, said spring having a perforated contact end portion, through which said wire passes, and a contact on one of said bars, with which said spring is adapted to make contact, substantially as and for the purposes set forth.

6. The herein-described circuit'closer, consisting, essentially, of a pair of bars a and a, metallic blocks 0 and 0 between said bars, a fine wire connected with said blocks, a contact-post c on said bar (I, a contaet-screw 72 connected with said post c, a contaetpost (5 on said bar a, a bar c connected therewith, a contact-screw c on said bar c", and a contactspring connected with said screw 70, said sprin having a perforated contact end portion, through which said wire passes, substantially as and for the purposes set forth.

7. The herein-describcd circuit-closcr, consisting, essentially, of a pair of bars a. and a, metallic blocks c and a between said bars, a finewirc connected with said blocks,a contactpost e on said bar a, a contact-screw it connect; ed with said post c, a eontactpost c on said bar a, a bar 6 connected therewith, a contact- Signed at Newark, in the county of Essex I screw 6 on said bar 6 and a contact-spring and State of New Jersey, this 23d day of connected with said screw h, said spring hav- March, A. D. 1897.

ingacoiled portion 4?, an arm '6 aflattened end HERMANN RUETSCHI. contact portion 1 and a perforated bent part Witnesses:

'5 through which said Wire passes, snbstan- JOHN H. KNELL,

tially as and for the purposes set forth. CHAS. B. PIERCE.

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