IMPROVEMENTS RELATING TO ELECTRIC SWITCHES

WIPO Patent Application WO1995004364

A3

PCT No. PCT/GB94/01709 Sec. 371 Date Aug. 19, 1996 Sec. 102(e) Date Aug. 19, 1996 PCT Filed Aug. 3, 1994 PCT Pub. No. WO95/04364 PCT Pub. Date Feb. 9, 1995A thermally-responsive current-sensitive switch having a molded plastic body containing first and second terminals in the form of metal stampings and having an internal chamber wherein a leaf spring and a snap-acting bimetallic blade of the same shape are together spot-welded to one of the terminals with the leaf spring underlying the bimetal in registry therewith and at its other end carrying a sliver contact which cooperates in switching operations with the other switch terminal. In one embodiment, the spring bias of the leaf spring tends to open the switch and the force generated by the bimetal in its contacts-closing movement is sufficient to overcome the spring bias of the leaf spring, whereas in another embodiment the leaf spring develops either a neutral force or a contacts-opening force. The leaf spring electrically shunts the bimetal, whereby the current-carrying capability of the switch is increased and different switch specifications can use the same bimetal with different leaf springs.

WO/2000/075948	MODULAR SET FOR ELECTRICAL MECHANISMS
JPH11126541	PUSH-ON SWITCH AND MANUFACTURE THEREOF
JP2006210242	STRUCTURE, FIXING METHOD, AND MANUFACTURING METHOD OF SWITCH

SMITH DAVID ANDREW (GB)

PCT/GB1994/001709

March 30, 1995

August 03, 1994

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OTTER CONTROLS LTD (GB)
SMITH DAVID ANDREW (GB)

H01H11/00; H01H37/34; H01H37/54; H01H73/22; H01H81/02; H01H37/14; (IPC1-7): H01H37/54; H01H81/02; H01H11/00

WO1992020086A1

1992-11-12

US3936788A	1976-02-03
US3573697A	1971-04-06
US3242292A	1966-03-22
US4013988A	1977-03-22
DE947488C	1956-08-16
US4041432A	1977-08-09
DE3703826A1	1988-08-18

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