Movement actuator/sensor systems

Details Movement actuator/sensor systems Movement actuator/sensor systems

1996-11-07

1998-04-28

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Thermal

310300, G01R 522, H02M 700

Patent

active

057449473

ABSTRACT:
A movement actuator includes an elongate filament made of a flexible material, and a strip of shape memory alloy disposed on the surface of one side of the filament. The shape memory alloy is responsive to actuation signals, heat or electrical signals, for changing its shape and when its shape changes, it causes the filament to move, i.e., bend, to accommodate the change in shape of the alloy. Also included is a signal supply device for selectively applying heat signals or electrical current to the strip of shape memory alloy to cause the alloy to change its shape and cause the filament to bend. Other patterns for the shape memory alloy could be disposed on the filament to cause other kinds of movements. For example, a helical pattern of the shape memory alloy about the filament would cause the filament to twist when the helical pattern were caused to shorten or lengthen.

REFERENCES:
patent: 2130829 (1938-09-01), Ackermann
patent: 3415712 (1968-12-01), Barker, Jr.

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