GB1197639A - Improvements in Thermally Operable Electric Switches. - Google Patents

Improvements in Thermally Operable Electric Switches.

Info

Publication number
GB1197639A
GB1197639A GB5086467A GB5086467A GB1197639A GB 1197639 A GB1197639 A GB 1197639A GB 5086467 A GB5086467 A GB 5086467A GB 5086467 A GB5086467 A GB 5086467A GB 1197639 A GB1197639 A GB 1197639A
Authority
GB
United Kingdom
Prior art keywords
blade
lever
contacts
bimetal
nov
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
GB5086467A
Inventor
George Leslie Whiffin
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB5086467A priority Critical patent/GB1197639A/en
Priority to FR1590919D priority patent/FR1590919A/fr
Publication of GB1197639A publication Critical patent/GB1197639A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/60—Means for producing snap action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively

Abstract

1,197,639. Thermal switches. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 7 Nov., 1968 [8 Nov., 1967], No. 50864/67. Heading H1N. In a thermally operable switch having a snap-action trifurcated blade 3 actuated by an electrically heated bimetal 1a through an intermediate lever 4, the lever 4 has a spring extension 4a which deflects in the event of a contact weld and engages a lever 5 attached to the blade 3 in the region of the contacts 3a, 8 to shear the contacts apart. The lever 4 is riveted to the end 3g of a cross-piece of the blade 3 which engages notched bollard 7. A projection 4b on the lever 4 presses downwards on the blade 3 to open the contacts for normal snap-action across the notch 9a in which the central compression leg 3f of the blade 3 rests. The bimetal 1a is U-section in plan with a second compensating arm (not shown). It may comprise bent-up sheet member with an arm 1c pivoted at groove 6 of the base or may comprise a pair of bimetal cantilever arms attached to a pivoted rod.
GB5086467A 1967-11-08 1967-11-08 Improvements in Thermally Operable Electric Switches. Expired GB1197639A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB5086467A GB1197639A (en) 1967-11-08 1967-11-08 Improvements in Thermally Operable Electric Switches.
FR1590919D FR1590919A (en) 1967-11-08 1968-11-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5086467A GB1197639A (en) 1967-11-08 1967-11-08 Improvements in Thermally Operable Electric Switches.

Publications (1)

Publication Number Publication Date
GB1197639A true GB1197639A (en) 1970-07-08

Family

ID=10457690

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5086467A Expired GB1197639A (en) 1967-11-08 1967-11-08 Improvements in Thermally Operable Electric Switches.

Country Status (2)

Country Link
FR (1) FR1590919A (en)
GB (1) GB1197639A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164443A (en) * 1984-09-18 1986-03-19 Home Automation Ltd Lighting control device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164443A (en) * 1984-09-18 1986-03-19 Home Automation Ltd Lighting control device

Also Published As

Publication number Publication date
FR1590919A (en) 1970-04-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees