GB190020458A - Improvements in Automatic Firealarms. - Google Patents

Improvements in Automatic Firealarms.

Info

Publication number
GB190020458A
GB190020458A GB190020458DA GB190020458A GB 190020458 A GB190020458 A GB 190020458A GB 190020458D A GB190020458D A GB 190020458DA GB 190020458 A GB190020458 A GB 190020458A
Authority
GB
United Kingdom
Prior art keywords
fire
box
disc
contact
closing
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
Application number
Inventor
Peter Stiens
Percival John Smith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB190020458A publication Critical patent/GB190020458A/en
Expired legal-status Critical Current

Links

Abstract

20,458. Stiens, P., and Smith, P. J. Nov. 13. Alarms, fire.-Relates to a device for closing the circuit of an electric alarm in case of fire. In case of a sudden rise of temperature due to a fire, the corrugated cover d of the box a expands and makes contact between the points f and i, thus closing the circuit of an electric alarm connected to the terminals j, l. The contact-piece iismounted in an insulating-disc h, which is attached to a second corrugated disc e inside the box a. When the rise of temperature is slow, the inner disc e is heated through the holes m in the box, both discs d and e expand at the same rate, and the pointsf and i do not come in contact.
GB190020458D 1900-11-13 1900-11-13 Improvements in Automatic Firealarms. Expired GB190020458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190020458T 1900-11-13

Publications (1)

Publication Number Publication Date
GB190020458A true GB190020458A (en) 1900-12-22

Family

ID=32150105

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190020458D Expired GB190020458A (en) 1900-11-13 1900-11-13 Improvements in Automatic Firealarms.

Country Status (1)

Country Link
GB (1) GB190020458A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2839630A (en) * 1955-06-20 1958-06-17 Bendix Aviat Corp Pressure-responsive switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2839630A (en) * 1955-06-20 1958-06-17 Bendix Aviat Corp Pressure-responsive switch

Similar Documents

Publication Publication Date Title
US1007178A (en) Pressure-ratio alarm.
GB190020458A (en) Improvements in Automatic Firealarms.
US522972A (en) Charles ctjttriss
US1179276A (en) Fire-alarm system including a thermal circuit-closer.
US983861A (en) Thermostatic alarm.
US812776A (en) Automatic fire-alarm.
US1374596A (en) Thermal circuit-closer
US1523505A (en) Thermostat
GB190010999A (en) An Improved Automatic Fire Alarm Apparatus.
US979977A (en) Electric fire-alarm.
US1034798A (en) Heat-indicating device.
US924499A (en) Thermostatic circuit-controller.
US627837A (en) Electric-circuit-closing device.
US603270A (en) Walter e
GB190225805A (en) An Electric Heat-indicator and Fire-alarm
US1232386A (en) Circuit-closer for fire-alarm systems.
GB960585A (en) Temperature sensitive electric device
GB190818787A (en) Improvements relating to Electric Fire Alarms.
GB190427545A (en) An Improved Automatic Fire or Excessive Heat Alarm.
GB190418598A (en) Automatic Fire Alarm.
US1211116A (en) Thermostatic apparatus.
GB190915718A (en) Improved Construction of Heat Recorder or Fire Alarm for Buildings, Ships, and the like.
US747166A (en) Thermostatic circuit-closer.
US797679A (en) Circuit-closer.
GB190809034A (en) Improvements in Fire and Temperature Alarms or Indicators.