GB536701A - Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus - Google Patents

Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus

Info

Publication number
GB536701A
GB536701A GB341440A GB341440A GB536701A GB 536701 A GB536701 A GB 536701A GB 341440 A GB341440 A GB 341440A GB 341440 A GB341440 A GB 341440A GB 536701 A GB536701 A GB 536701A
Authority
GB
United Kingdom
Prior art keywords
thermal
contacts
supply
current
strip
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
GB341440A
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.)
VICTOR ELLIS MILWARD
British Thomson Houston Co Ltd
Original Assignee
VICTOR ELLIS MILWARD
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 VICTOR ELLIS MILWARD, British Thomson Houston Co Ltd filed Critical VICTOR ELLIS MILWARD
Priority to GB341440A priority Critical patent/GB536701A/en
Publication of GB536701A publication Critical patent/GB536701A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
    • H01H61/08—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength

Landscapes

  • Control Of Resistance Heating (AREA)

Abstract

536,701. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd., CLOUGH, F. H., and MILWARD, V. E. Feb..23, 1940, No. 3414. [Class 38 (v)] Heating apparatus is energized for a controllable period in each cycle of operation of a thermal responsive element operated by its own heating coil switched on and off at pre-determined positions of the thermal device. A bi-metallic strip 1 is caused to open by heat in a coil 3, wound about it, and energized through contacts 7. On reaching the upper stop 9 the contacts 7 are separated and the thermal strip cools until by pressing the stop 8 the contacts 7 are again closed and the cycle repeats. A magnetic " detent " 10, 11 may be used to ensure a snap action. An adjustable contact 13 co-operates with a contact 14 borne by the thermal strip to regulate the extent of the period during which current passes to the heating apparatus controlled.
GB341440A 1940-02-23 1940-02-23 Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus Expired GB536701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB341440A GB536701A (en) 1940-02-23 1940-02-23 Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB341440A GB536701A (en) 1940-02-23 1940-02-23 Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus

Publications (1)

Publication Number Publication Date
GB536701A true GB536701A (en) 1941-05-23

Family

ID=9757885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB341440A Expired GB536701A (en) 1940-02-23 1940-02-23 Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus

Country Status (1)

Country Link
GB (1) GB536701A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547171A (en) * 1947-10-31 1951-04-03 Essex Wire Corp Snap switch
US3239632A (en) * 1962-10-04 1966-03-08 G V Controls Inc Electrothermal device for cyclic contact operation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547171A (en) * 1947-10-31 1951-04-03 Essex Wire Corp Snap switch
US3239632A (en) * 1962-10-04 1966-03-08 G V Controls Inc Electrothermal device for cyclic contact operation

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