GB276573A - Improvements relating to fire alarms - Google Patents

Improvements relating to fire alarms

Info

Publication number
GB276573A
GB276573A GB591327A GB591327A GB276573A GB 276573 A GB276573 A GB 276573A GB 591327 A GB591327 A GB 591327A GB 591327 A GB591327 A GB 591327A GB 276573 A GB276573 A GB 276573A
Authority
GB
United Kingdom
Prior art keywords
contacts
thermometer
mercury
bulb
improvements relating
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
GB591327A
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.)
JOSEPH MOLLOY
Original Assignee
JOSEPH MOLLOY
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 JOSEPH MOLLOY filed Critical JOSEPH MOLLOY
Priority to GB591327A priority Critical patent/GB276573A/en
Publication of GB276573A publication Critical patent/GB276573A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

276,573. Molloy, J. March 3, 1927. Alarms operated by expansion of liquids.-In a mercury contact thermometer 1, the contacts 2a, 3a are connected respectively to metal caps 2, 3 fitted to the ends of the thermometer and adapted for ready insertion in, or removal from. clip or like terminals 4, 5 in an alarm circuit including a battery 6 and bell, lamp, &c. 7. The thermometer and contacts thus constitute a unit which can be readily applied to the circuit. The contact 3<a> may be adjustable. In a modification, the mercury bulb 1<b> is in a position in the tube 1 somewhat removed from the cap 2. In other modifications, an air bulb is provided at the end of the tube remote from the mercury bulb, and one or both of the contacts is or are connected to a ring or rings instead of to the caps.
GB591327A 1927-03-03 1927-03-03 Improvements relating to fire alarms Expired GB276573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB591327A GB276573A (en) 1927-03-03 1927-03-03 Improvements relating to fire alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB591327A GB276573A (en) 1927-03-03 1927-03-03 Improvements relating to fire alarms

Publications (1)

Publication Number Publication Date
GB276573A true GB276573A (en) 1927-09-01

Family

ID=9804962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB591327A Expired GB276573A (en) 1927-03-03 1927-03-03 Improvements relating to fire alarms

Country Status (1)

Country Link
GB (1) GB276573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315055A (en) * 1963-11-18 1967-04-18 H J Elliott Ltd Temperature-responsive expansiblefluid switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3315055A (en) * 1963-11-18 1967-04-18 H J Elliott Ltd Temperature-responsive expansiblefluid switch

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