US777506A

US777506A - Thermo-electric alarm.

Info

Publication number: US777506A
Application number: US20569304A
Authority: US
Inventors: Anton Haslinger
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-04-30
Filing date: 1904-04-30
Publication date: 1904-12-13
Anticipated expiration: 1921-12-13

Description

PATENTED DEO. 13, 1904..

A. HASLINGER.

THERMO ELECTRIC ALARM.

APPLICATION FILED APE. 30,1904.

.N0 MODEL.

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UNITED STATES Patented December 13, 1904.

PATENT @EEIGE THERMO-ELECTRIC ALARM.

SPECIFICATION forming part of Letters Patent No. 777,506, dated December 13, 1904.

Application led April 30, 1904.

Be it known that I, ANTON HAsLINeER, a subject of the Emperor of Austria-Hungary, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful improvements in Thermo-Electric Alarms, of which the following is a specification, reference being had therein to the accompanying' drawings.

This invention has relation to alarms, and more `particularly to that class. known as thermo-electrlc alarms, wherein a thermostat, bell, and an electric current are used to sound an alarm at a predetermined time.

The object of my invention is to construct a thermo-electric alarm which may be employed in connection with gas-stoves, whereby should the gas-supply be shut off unbeknown to the consumer an alarm will be given.

Briefly described, my invention consists in employing a thermostat, which is connected to the side of a gas-stove, and a bell and electrical source or' energj,T are located in any suitable place wherein il the alarm is sounded the same will be heard, and the gas-stop cock used in connection with the gas-stove may be closed whereby should the gas-supply again be turned on it will be impossible for the same to escape into the compartment in which the stove is used.

With the above and other objects in view reference will be had to the accompanying1 drawings, forming a part of this application, wherein like numerals of reference indicate like parts throughout the several views, in which- Figure 1 is a diagrammatical view showing the thermostat attached to the'side of the stove and in circuit with the electric bell and the electric source of energy. Fig. 2 is a front elevation of the thermostat, and Fig. 3 is a rear elevation thereof.

To put my invention into practice, 1 have constructed a thermostat which may be readily attached to the side of any form of gas-stove, whereby the heat from the same will affect the thermostat and operate it to accomplish the desired results, and in carrying out my invention I have illustrated in Fig. 1 of the drawings a perspective view of the ordinary Serial No. 205,693. (No model.)

type of gas-stove commonly used, the reference-numeral 1 indicating the stove, which has a gas-supply pipe 2, carrying the ordinary stop-cock 3, this gas-supply pipe 2 being connected to the ordinary combustion chamber or burner 1.

The thermostat, as designated by the reference-numeral 5, is constructed with an annular casing 6, supported upon an annular plate 7, having outwardly-eXtending lugs 8 8, which are provided with apertures 9 9, whereby said thermostat may be secured to the side ot' a stove, and in Fig. 1 o'lI the drawings l have shown the same connected to the stove 1 by rivets 1() 10. The casing 6 of the thermostat is provided with binding-posts 11 12, to which the wires 14 15 are connected by screws 16 16, and to the binding-post 12 another wire, 17, is attached by a screw 18, this wire having its other end connected to a post 19, carried by the plate 7 of the thermostat. The casing 6 of the thermostat has attached thereto a sensitive spring 20, said spring heilig' attached. to the casing by rivets 21, and the other end or' said spring is twisted at right angles to itself, as designated at 22, and pivoted to a bar 7', as indicated at 23, the outer end oi' the bar being bent at right angles and pivotally connected, as indicated at 24, to an arm 25, this arm being' formed integral with a segmental rack 26, which is pivoted at 27 between the arm 28 and the plate 7. The arm 28 is T-shaped in t'orm and is supported upon its one end by a pin 29, while the T-shaped end thereof is supported upon pins 30, these pins being' carried by the plate 7. rlhe segmental rack 26 meshes with a pinion 31, which is connected to a shaft 32, said shaft protruding through the plate 7 and has secured onrits outer end the screw 33 and indicating-hand 84. In Fig. 2 of the drawings it will be seen that the other side o1 the plate 7 to that illustrated in Fig. 3 carries a casing 35, which is provided with a glass cover 36, and on this side of the plate 7 is arranged the graduationmarks 37, the object of which will be hereinafter more fully described.

As before stated, a wire 15 is connected to the binding-post 12, andthe other end oi this wire, as shown in Fig. 1 of the drawings, is

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connected to a post 38 of an electric bell 39, this bell being of the ordinary construction and carries vanother post, 40, to which is connected the end of a wire 41, which in turn is connected to the positive pole 42 of a battery 43, the negative pole 44 of said battery having a wire 45 connected to it, and the other end of this wire 45 is connected to a contactpin 46, carried by the switch-block 47. rIhis switch-block is of the ordinary construction and carries a pivoted lever 48, to the pivoted end 49 of which is connected the end of the wire 14, the other end of which is connected to the binding-post 11 of the thermostat.

The operation of my improved alarm is as follows: By referring to Fig. 1 of the drawings it will be observed that I have mounted the thermostat 5 upon the side wall of a gasstove, although the same may be mounted in any other desired place, whereby the heat from the stove will effect and operate the thermostat, and I have employed in the thermostat the ordinary and well-known sensitive spring, as indicated at 20. When the heat from the stove is shut off, the spring remains in the contracted postion, (shown in Fig. 3 of the drawings,) normally holding the pivoted end 24 of said spring in contact with a pin 50, formed integral with the end of the binding-post 11.

In case the switch-lever 48 should be in the closed position and in engagement with the contact-pin 46, a circuit will be completed through wire 14 to switch-lever 48, through contact-pin 46 to wire 45, tothe negative pole 44 of the battery which forms the source of electrical energy, from the positive pole 42 through wire 41, which is connected to the post 40 of the bell 39, from whencethe circuit proceeds from the post 38 through the wire 15 to the binding-post 12, through wire 17 to the post 19, carried by the plate 7, from whence the circuit is conveyed through pivot 27 to the arm 25.

The circuit just described is completed and rings the electric Ibell 39 when the gas-supply which comes through the pipe 2 of the stove has been shut off unbeknown to the consumer; but when the gas is burning in the stove l the heat from the stove expands the sensitive spring 22 and throws the same in the position shown in dotted lines of Fig. 3, wherein the arm 25 is held out of engagement with the pin 5() of the binding-post 11 and the circuit is broken. The switch 47 is located in any desired position, whereby the circuit may be broken when it is not desired to use the apparatus, and in case the same is to be used the lever 48 of the switch is thrown into engagement with the contact-pins 46.

Upon the sensitive spring 22 being expanded or contracted by the stove the arm 25 will be moved in one or the other direction, whereby the segmental rack 26 will be operated, and as the same meshes with the pinion 31, carried by the shaft 32, the pinion will be rotated, re-

volving the hand 34, carried upon the other end of the shaft 32 in one or the other direction, and I employ the dial 36, which is graduated, whereby a danger-point caused by the,

gas in the stove becoming very low can be noticed by examining the dial of the thermostat. The switch 47 is also used, whereby should the gas of the stove 1 be shut olf unbelinown to the consumer and the alarm is given the consumer can close the supply of gas by the stop-cock 3, and thus by drawing the switchlever 48 out of engagement with the contactpin 46 the further sounding of the alarm can be stopped until it is desired to use the same again, at which time the switch-lever 48 is thrown into engagement with the contact-pin 46 and another alarm is ready to be given in case the supply of gas should be shut off.

From the above description it will be seen that my improved alarm will entirely eliminate all danger in connection with gas-stoves which has been experienced where the supply of gas has for some reason or other been shut off unbeknown to the consumer when the stove was consuming the same, and while I have herein shown my improved alarm system as connected to a gas-stove it is obvious that the same may be readily employed in connection with furnaces and the like, whereby an alarm will be given if the fires in the same become very low and need attention.

What I claim, and desire to secure by Letters Patent, is-

1. In an apparatus of the character described, the combination of a gas-stove, a thermostat attached to the exterior of the stove and provided withcontact-points, a dial and an indicating-hand, an electric circuit including a battery, an electric bell and the contactpoints of the thermostat, with a gas-supply pipe leading to said stove, a gas-burner located within the stove and a cock on said pipe, the said cock being located apart and electrically insulated from said electric circuit and being operable independently to regulate the flow of gas without affecting the continuity of said circuit.

2. In a device of the character described, the combination with a gas-stove, a burner located within the stove, a gas-supply pipe leading to the stove and a cock on said supply-pipe, of a thermostat comprising a casing, a sensitive spring located within the casing, a bar pivotally attached to one end of said spring, a pivotally-supported segmental rack having an arm connected to said bar, a pinion meshing with said segmental rack, a shaft on which said pinion is mounted, a hand carried by said shaft, a dial on the outside of the casing, an electric contact mounted in said casing and adapted to touch the arm of the segmental rack at one position of the rack and an electric circuit including said contact, and said segmental rack and also including a battery and a signal device.

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3. In a device of the character described, the combination with a gas-,stove having a suitable supply of gas, a thermostat attached.

to said stove, a dial carried by said thermostat, a sensitive spring carried by said thermostat, a rotatable shaft mounted in said thermostat, a hand carried upon one end of said shaft,l means whereby when said spring' is contracted, or expanded, said hand will be rotated upon the dial, an electric bell, said bell and thermostat being in circuit vwith a suit- H. C. EYERT, WM. (l. HEITZ.