Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With longitudinally expansible solid element
Patent
1992-10-01
1993-06-01
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With longitudinally expansible solid element
337141, H01H 6102, H01H 7118
Patent
active
052164039
ABSTRACT:
A relay including a control circuit which via a movement creating or actuating arm and a transmission mechanism activates a contact means in order to switch on or switch off a main circuit. The actuating arm includes two elongated parallel parts which are separated by a thermally and electrically insulated layer. The two parallel parts each have a first end fastened to a housing or holder. The two parallel parts each have a second end fixed to each other, forming a movable end of the arm. One or both parallel parts of the arm are provided with a heat creating or producing element. The actuating arm, attached at one end and movable at the other end, together with the heat producing element, constitutes the first part of the control circuit or relay. When a control current flows through the heat producing element, one of the two parallel parts of the arm is heated thereby causing a movement of the movable end of the arm to thereby activate the control means through the transmission mechanism. The transmission mechanism includes a finger extending mainly perpendicular to the length direction of the movable arm, with the finger acting on a leaf spring. The leaf spring is generally parallel to the arm, the spring supports said contact means which switch on or off the main circuit.
REFERENCES:
patent: 3239632 (1966-03-01), McMullen
patent: 5023587 (1991-06-01), BHerquist et al.
Bergquist Per-Marcus
Troberg Henrik E.
Aktiebolaget Electrolux
Broome Harold
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