GB627534A - Improvements in thermal responsive electric switches - Google Patents

Improvements in thermal responsive electric switches

Info

Publication number
GB627534A
GB627534A GB357347A GB357347A GB627534A GB 627534 A GB627534 A GB 627534A GB 357347 A GB357347 A GB 357347A GB 357347 A GB357347 A GB 357347A GB 627534 A GB627534 A GB 627534A
Authority
GB
United Kingdom
Prior art keywords
envelope
discs
contact
wires
lead
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
GB357347A
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.)
ALAN EDWARD BIRD
British Thomson Houston Co Ltd
Original Assignee
ALAN EDWARD BIRD
British Thomson Houston Co 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 ALAN EDWARD BIRD, British Thomson Houston Co Ltd filed Critical ALAN EDWARD BIRD
Priority to GB357347A priority Critical patent/GB627534A/en
Publication of GB627534A publication Critical patent/GB627534A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only
    • H05B41/08—Starting switches thermal only heated by glow discharge

Landscapes

  • Thermally Actuated Switches (AREA)

Abstract

627,534. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd., and BIRD, A. E. Feb. 6, 1947, No. 3573. [Class 38(v)] A glow - discharge or other thermal switch has its contact elements formed as a rigid structure and contained in a glass envelope in the side wall of which the lead-in wires are sealed. The contact structure is formed by two metal rods 7, 8 spaced apart by insulating discs 9, 10 closely fitting the envelope 1, the rods passing through holes in the discs. The longitudinal spacing of the discs is maintained by metal clips 11 which engage in notches in the discs and are welded to the rods. A U-shaped bimetallic strip 14 is supported by rod 7 and has a contact which co-operates with the rod 8. In manufacture, the contact structure is placed in the envelope 1, as shown, and the lead-in wires 15 are bent over the open rim. The rim of a glass sealing tube of the same diameter as the envelope is brought into contact with the rim of the envelope and the rims are fused together, so sealing the lead-in wires in position in the side wall. The insulating discs may be coated with aluminium paint to facilitate the starting of the glow-discharge in the dark.
GB357347A 1947-02-06 1947-02-06 Improvements in thermal responsive electric switches Expired GB627534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB357347A GB627534A (en) 1947-02-06 1947-02-06 Improvements in thermal responsive electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB357347A GB627534A (en) 1947-02-06 1947-02-06 Improvements in thermal responsive electric switches

Publications (1)

Publication Number Publication Date
GB627534A true GB627534A (en) 1949-08-10

Family

ID=9760886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB357347A Expired GB627534A (en) 1947-02-06 1947-02-06 Improvements in thermal responsive electric switches

Country Status (1)

Country Link
GB (1) GB627534A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741680A (en) * 1953-12-02 1956-04-10 Ets Claude Paz & Silva Overvoltage arrestor with a discharge in a low temperature atmosphere

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741680A (en) * 1953-12-02 1956-04-10 Ets Claude Paz & Silva Overvoltage arrestor with a discharge in a low temperature atmosphere

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