| 摘要 |
The invention relates to an electric control device for controlling displacement of a moving element (22) between two predetermined positions, said element (22) being associated with one or two electrically conductive return means (18, 30) having shape memory which exert substantially no return force on the element (22) so long as no electric current is passing therethrough, and which exert sufficient force thereon to displace it when an electric current is caused to pass therethrough, with an electric current being switched through one or other of the return means by a controlling switch (10). Once the moving element has reached the desired predetermined position, the electric current used to move it is interrupted by means of a toggle switch (24) operated by the moving element. The invention is applicable to selecting pneumatic functions, e.g. in the motor industry. |
