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公开(公告)号：US3663839A
公开(公告)日：1972-05-16
申请号：US3663839D
申请日：1971-02-24
Applicant: NASA
Inventor： DERR LLOYD J , TOBIAS ROBERT A
Abstract: An electrically powered actuator for providing a rotational or large linear motion, which is simple and highly reliable, including a bi-metallic strip with a slot extending along its length from one end to a position near the opposite end. In a rotational actuator, the strip is bent into a spiral, with the inner turn fixed to the shaft which is to be rotated and the outer turn fixed to a support and connected to electrical leads. Current passed through the leads and through the slotted strip heats it to make it uncoil or to make it coil further, the several rotations of the strip resulting in a large rotation of the shaft.
Abstract translation: 一种用于提供旋转或大直线运动的电动致动器，其是简单且高度可靠的，包括具有沿其长度从一端延伸到靠近相对端的位置的狭槽的双金属带。 在旋转致动器中，条带被弯曲成螺旋形，内旋转固定到要旋转的轴上，外转圈固定到支撑件并连接到电引线。 通过引线的电流通过开槽带加热，使其开卷或使其进一步盘绕，带的几个旋转导致轴的大的旋转。
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公开(公告)号：US3591960A
公开(公告)日：1971-07-13
申请号：US3591960D
申请日：1969-08-19
Applicant: NASA
Inventor： DERR LLOYD J , TOBIAS ROBERT A
CPC classification number: B64G1/66
Abstract: A thermostatic actuator for imparting displacement to mechanical linkages and the like, having particular utility aboard spacecraft and characterized by the utilization of a rectilinearly reciprocating, spring-biased output shaft operatively coupled with a stack of superimposed individual bimetal disc members and a selectively operable electric heater including a resistance coil associated therewith adapted to heat the stack for achieving distortion of the individual disc members and an elongation of the stack to cause the output shaft to be axially extended against the bias of the spring and a bimetal latch coupled with the shaft adapted to latch the shaft against axial extension, at a first temperature, and to release the shaft for an extending displacement at elevated temperatures, whereby the actuator is selectively driven by energizing the heater.
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