GB208645A - Improvements in electric fire alarms - Google Patents

Improvements in electric fire alarms

Info

Publication number
GB208645A
GB208645A GB3550822A GB3550822A GB208645A GB 208645 A GB208645 A GB 208645A GB 3550822 A GB3550822 A GB 3550822A GB 3550822 A GB3550822 A GB 3550822A GB 208645 A GB208645 A GB 208645A
Authority
GB
United Kingdom
Prior art keywords
fire alarms
semi
electric fire
strips
fusible
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
GB3550822A
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
Priority to GB3550822A priority Critical patent/GB208645A/en
Publication of GB208645A publication Critical patent/GB208645A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

208,645. Edwards, A. H. Dec. 30, 1922. Alarms operated by fusible devices.-An automatic electric contact device for fire alarms comprises two semi-conical metal strips d mounted in a porcelain base a, the pointed ends of the strips being tinned and provided with fusible metal g which, on melting, makes electric connection between them. The semi-cones are coated with flux to ensure good contact. The device may be used in an ordinary bell circuit.
GB3550822A 1922-12-30 1922-12-30 Improvements in electric fire alarms Expired GB208645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3550822A GB208645A (en) 1922-12-30 1922-12-30 Improvements in electric fire alarms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3550822A GB208645A (en) 1922-12-30 1922-12-30 Improvements in electric fire alarms

Publications (1)

Publication Number Publication Date
GB208645A true GB208645A (en) 1923-12-27

Family

ID=10378536

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3550822A Expired GB208645A (en) 1922-12-30 1922-12-30 Improvements in electric fire alarms

Country Status (1)

Country Link
GB (1) GB208645A (en)

Similar Documents

Publication Publication Date Title
GB208645A (en) Improvements in electric fire alarms
GB191314562A (en) Improvements in Electric Liquid-heaters.
GB227928A (en) Improvements in or relating to electric fuses
GB738874A (en) Method of soldering an assembly of electrical conductors
GB363442A (en) Combined electric switch arm and fuse carrier
GB245225A (en) Improvements relating to electrical contact clips
GB505783A (en) Improvements in terminals for electric conductors
GB560769A (en) Arc quenching device for use with current collectors
FR2303366A1 (en) Electric plug-in relay - has coil, together with two polar pieces and actuating plate inside coil to operate vehicle turn indicators
GB288956A (en) Improvements in burglar alarms
GB372667A (en) Improvements in and relating to electric switches with fusible retaining means
GB223683A (en) Fire alarm cable
GB364263A (en) Improvements in and relating to cut-out insulators for electrical purposes
GB149506A (en) Improvements in or relating to electric cut-outs
CA222956A (en) Electrical circuit breaker
CA375948A (en) Electric circuit terminal device
GB191409411A (en) Improvements in Electric Resistances.
GB140332A (en) Improvements in electrical protective devices
GB517719A (en) Improvements in thermally actuated electrical cut-outs
GB487829A (en) Improvements in and relating to fusible elements for protecting electric circuits
GB345030A (en)
CA241472A (en) Electrical circuit
CA245398A (en) Terminal for electrical conductors
GB221618A (en) Combined earthing switch, lightning arrester, lead in tube, and terminal block for wireless apparatus
CA226697A (en) Electrical circuit and apparatus