Shape-memory wire actuated switch

Details Shape-memory wire actuated switch Shape-memory wire actuated switch

1998-08-05

1999-11-23

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

337 12, 337343, 337393, 60527, 60528, H01H 6106, H01H 3746, H01H 3750

Patent

active

059907770

ABSTRACT:
A switch (10) is provided that has a housing (12), an actuator (20), a contact blade (18), first and second shape-memory wires (28,30), and first and second contact points (70,71). The actuator (20) has a first end portion (52) pivotally coupled to the housing (12), and a second end portion (22) with first and second generally opposed arm portions (24), (26) extending therefrom. The contact blade (18) has the first contact point (70) positioned thereon, and is coupled to and moveable with the actuator (20). The first and second shape-memory wires (28,30) respectively extend between the first and second arm portions (24,26) of the actuator (20) and the housing (12). The second contact point (71) is coupled to the housing (12) and is electrically engageable with the first contact point (70) in response to movement of the actuator (20).

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