GB390745A - Improvements in or relating to automatic fire-alarm apparatus - Google Patents

Improvements in or relating to automatic fire-alarm apparatus

Info

Publication number
GB390745A
GB390745A GB28729/32A GB2872932A GB390745A GB 390745 A GB390745 A GB 390745A GB 28729/32 A GB28729/32 A GB 28729/32A GB 2872932 A GB2872932 A GB 2872932A GB 390745 A GB390745 A GB 390745A
Authority
GB
United Kingdom
Prior art keywords
fuse
springs
relating
automatic fire
alarm apparatus
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
GB28729/32A
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
Publication of GB390745A publication Critical patent/GB390745A/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)
  • Fuses (AREA)

Abstract

390,745. Thermal switches. SORENSEN, C., 9, Universitetsgaten, Oslo, Norway. Oct. 14, 1932, No. 28729. Convention date, April 27. [Class 38 (v).] Two or more metal springs or similar elements are inserted in parallel in a fire-alarm circuit which is held open by means of a fuse. A common fuse 8, as shown, holds springs 1, 2 away from circuit contacts 4, 5 respectively. The springs 1, 2 may be arranged side by side or behind one another, as shown, and may subject the fuse to tension or compression. The invention ensures a multiple safety in the event of the contacts becoming dirty.
GB28729/32A 1932-04-27 1932-10-14 Improvements in or relating to automatic fire-alarm apparatus Expired GB390745A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO390745X 1932-04-27

Publications (1)

Publication Number Publication Date
GB390745A true GB390745A (en) 1933-04-13

Family

ID=19905501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28729/32A Expired GB390745A (en) 1932-04-27 1932-10-14 Improvements in or relating to automatic fire-alarm apparatus

Country Status (1)

Country Link
GB (1) GB390745A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352161A (en) * 2022-01-23 2022-04-15 陈丽军 Intelligent aluminum alloy door and window

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114352161A (en) * 2022-01-23 2022-04-15 陈丽军 Intelligent aluminum alloy door and window
CN114352161B (en) * 2022-01-23 2023-08-08 广东省星际铝业有限公司 Intelligent aluminum alloy door and window

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