US108352A - Improvement in fire-alarm thermometers - Google Patents
Improvement in fire-alarm thermometers Download PDFInfo
- Publication number
- US108352A US108352A US108352DA US108352A US 108352 A US108352 A US 108352A US 108352D A US108352D A US 108352DA US 108352 A US108352 A US 108352A
- Authority
- US
- United States
- Prior art keywords
- alarm
- bulb
- wires
- thermometers
- fire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 8
- 229910052753 mercury Inorganic materials 0.000 description 7
- 239000011521 glass Substances 0.000 description 4
- 241000612703 Augusta Species 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
- G01K5/02—Measuring temperature based on the expansion or contraction of a material the material being a liquid
- G01K5/16—Measuring temperature based on the expansion or contraction of a material the material being a liquid with electric contacts
Definitions
- Figures 1 and 2 are transverse sections of my improved tire-alarm thermometer, showing modifications in the'construction of the same.
- Tire object of this invention is to construct an instrument for closing the circuit of an electric firealarm, as soon as the atmosphere which surrounds said instrument has reached a certain degree of heat.
- the invention relates to the use of a glass thcrmonieter containing (pricksilvcr.
- thermometer is 'to be broken when the stated dcgrcc oi heat has been reached, and will then deposit its metallic contents into an outer vessel, which re ccives the two wires from the alarm instrument and battery.
- the quicksilver uniting the ends of said wires, cslablishcs a metallic circuit, and cti'ccts the operation of the alarm.
- the alarm-thermometers herctoiorc in use had the ends of the wires inserted in the respective ends of the glass or other vessel containing the mercury, but were incilicienton account ol the unequal expansion and contraction of the wire and glass under the ordinary variations of temperature, whereby air was let into the instrument or the glass broken.
- My invention consists chiefly in the application of asealed-bulb or vessel, A, containing mercury, to an outer vessel, B, and the wires 0 D, that lead to a suitable alarm instrument and battery.
- the bulb or vessel A when burst by-thc action of the expanding mercury, with or without the aid of an outer spring, E, will discharge its contents into the vessel B, so that the ends of the wires 0 D will be united by the mercury.
- the electric current is thereby established, and the alarm operated.
- the invention consists also in the combination with said apparatus of a spring or springs, E, of suitablekind. The same serve to break the bulb and open the same for discharging the mercury immediately after the bulb has been burst by the latter.
- the-spring may either be applied to pull at one end of the bulb, as in jig. 1, or to push againstthe same, as in 2, and it maybe concealed within the vessel B, or arranged (i'utside of the same, one end of the bulb being sccuret by a wire or other fastening, u, when the spring is applied to pull.
- the invention consists also in the arrangement of the said vessel B, which contains the bulb A and the ends of the wires 0 D to connect the latter by the mercury from the former whenever the bulb is burst.
- the vessel 15 may either be made in form shown in lig. l, i. a, opcii on top and sides to receive air, or it may be a case, as in fig. .5, perforated to admit air, or of other suitable form.
- Tlie spring or springs 1 combined with the bulb or thermometer, to aid in parting the same when broken, substantially as herein shown and described.
- the vessel B containing the bulb or thermometer A, and the ends of the wires 0 D, for operating, substantially as herein shown and described.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Description
A. GUEST.
Thermostat.
Patented Oct. 18, 1870.
wafm
dtniwl fibers {some (refine AUGUSTA GUEST, OF BROOKLYN, NEW YORK.
Letters Patent No. 108,352, dated October 18, 1870.
IMPROVEMENT IN FIRE-ALARM THERMOMETERS.
The Schedule referred to in these Letters Patent and making part. of the same.
To all whom it may concern:
Be it known that I, Mrs. Aueus'ra G onsr, of Brooklyn, in the county of Kings and State ofNew York, have invented a new and improved l irc-alarnr Thermometer; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this'spccification.
Figures 1 and 2 are transverse sections of my improved tire-alarm thermometer, showing modifications in the'construction of the same.
Similar letters of reference indicate corrcsp'olnling parts.
Tire object of this invention .is to construct an instrument for closing the circuit of an electric firealarm, as soon as the atmosphere which surrounds said instrument has reached a certain degree of heat.
The invention relates to the use of a glass thcrmonieter containing (pricksilvcr.
The thermometer is 'to be broken when the stated dcgrcc oi heat has been reached, and will then deposit its metallic contents into an outer vessel, which re ccives the two wires from the alarm instrument and battery.
The quicksilver, uniting the ends of said wires, cslablishcs a metallic circuit, and cti'ccts the operation of the alarm.
The alarm-thermometers herctoiorc in use had the ends of the wires inserted in the respective ends of the glass or other vessel containing the mercury, but were incilicienton account ol the unequal expansion and contraction of the wire and glass under the ordinary variations of temperature, whereby air was let into the instrument or the glass broken.
These devices were also unrcliablc,as'thc least dcl'cct of the platina points inserted in the mercury were apt to corrode the latter, and because, furthermore,
rats and "mice, by pulling or moving the wires, were apt to render the whole apparatus useless.
My invention consists chiefly in the application of asealed-bulb or vessel, A, containing mercury, to an outer vessel, B, and the wires 0 D, that lead to a suitable alarm instrument and battery.
The bulb or vessel A, when burst by-thc action of the expanding mercury, with or without the aid of an outer spring, E, will discharge its contents into the vessel B, so that the ends of the wires 0 D will be united by the mercury. The electric current is thereby established, and the alarm operated.
The invention consists also in the combination with said apparatus of a spring or springs, E, of suitablekind. The same serve to break the bulb and open the same for discharging the mercury immediately after the bulb has been burst by the latter.
For this purpose the-spring may either be applied to pull at one end of the bulb, as in jig. 1, or to push againstthe same, as in 2, and it maybe concealed within the vessel B, or arranged (i'utside of the same, one end of the bulb being sccuret by a wire or other fastening, u, when the spring is applied to pull.
The invention consists also in the arrangement of the said vessel B, which contains the bulb A and the ends of the wires 0 D to connect the latter by the mercury from the former whenever the bulb is burst.
The vessel 15 may either be made in form shown in lig. l, i. a, opcii on top and sides to receive air, or it may be a case, as in fig. .5, perforated to admit air, or of other suitable form.
It will be seen that the condition or disturbance of the wires during inactivity will not not affect the utility or or effectiveness of my apparatus.
Having thus described my invention,
.l claim as new and desire to secure by Letters latcnt- I a l. The scaled bulb or thermometer, combined with two wires, so that by the bursting at said bulb a metallic connect-ion between the wires and a consequent electric circuit will be established, substantially as herein shown and described.
2. Tlie spring or springs 1), combined with the bulb or thermometer, to aid in parting the same when broken, substantially as herein shown and described.
The vessel B,containing the bulb or thermometer A, and the ends of the wires 0 D, for operating, substantially as herein shown and described.
' AUGUSTA GUEST.
Witnesses A. V. Bmnsnn, GEO. W. Mamas.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US108352A true US108352A (en) | 1870-10-18 |
Family
ID=2177826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US108352D Expired - Lifetime US108352A (en) | Improvement in fire-alarm thermometers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US108352A (en) |
-
0
- US US108352D patent/US108352A/en not_active Expired - Lifetime
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