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GB1267554A - Heat detection electric switch - Google Patents

Heat detection electric switch

Info

Publication number
GB1267554A
GB1267554A GB5657969A GB5657969A GB1267554A GB 1267554 A GB1267554 A GB 1267554A GB 5657969 A GB5657969 A GB 5657969A GB 5657969 A GB5657969 A GB 5657969A GB 1267554 A GB1267554 A GB 1267554A
Authority
GB
United Kingdom
Prior art keywords
nov
casing part
disc
sealed
engagement
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
GB5657969A
Inventor
Hiroaki Mamiya
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Publication of GB1267554A publication Critical patent/GB1267554A/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

1,267,554. Thermal switches. MATSU. SHITA DENKO K.K. 19 Nov., 1969 [25 Nov., 1968 (2); 29 Nov., 1968], No. 56579/69. Heading H1N. A sealed thermal switch for use in fire-detection alarm systems &c. comprises a bimetal disc (1, Fig. 4) in thermally conductive engagement at normal temperatures with a metal casing part 4 carrying a heat collecting plate H provided with apertures, slits &c. 21, Fig. 6A, to improve the rate of heat transfer. The bimetal disc 1 snaps upwards when heated to move a spring arm contact 5, 6 into engagement with a fixed contact 7. Terminal wires 8, 9 are sealed in the casing part 2 and hold the assembly in position under projections 16a, 16b of a ceiling mounting B having terminals (not shown) to which the wires 8, 9 are soldered. The disc 1 rests in three recesses such as 3c of integral lugs 3a, 3c (3b) (not shown), of the casing part 2.
GB5657969A 1968-11-25 1969-11-19 Heat detection electric switch Expired GB1267554A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP10265568 1968-11-25
JP10265668 1968-11-25
JP10456868 1968-11-29

Publications (1)

Publication Number Publication Date
GB1267554A true GB1267554A (en) 1972-03-22

Family

ID=27309759

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5657969A Expired GB1267554A (en) 1968-11-25 1969-11-19 Heat detection electric switch

Country Status (3)

Country Link
CH (1) CH499329A (en)
DE (1) DE1958970B2 (en)
GB (1) GB1267554A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020442A (en) * 1974-03-08 1977-04-26 Hochiki Corporation Composite-type heat-system fire sensing device
JPS5317096A (en) * 1976-07-30 1978-02-16 Matsushita Electric Works Ltd Fire sensor
DE3013831C2 (en) * 1979-04-11 1985-07-11 Hochiki Corp., Tokio/Tokyo Temperature detection device
US4591822A (en) * 1984-11-30 1986-05-27 Therm-O-Disc, Incorporated Bimetal thermostat with head collector
US4623866A (en) * 1985-07-02 1986-11-18 Elmwood Sensors, Inc. Cap and bracket assembly for thermostatic switch and method of manufacturing same

Also Published As

Publication number Publication date
DE1958970B2 (en) 1971-12-02
DE1958970A1 (en) 1970-06-04
CH499329A (en) 1970-11-30

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