Electrical motor-control device for electrical equipment
AssigneeUnelec
InventorsJean Hennemann, Bernard Daussin
Life of this patent
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Abstract
Electrical motor-control device for electrical equipment comprising a drive mechanism including an electric motor and a movement transformation mechanism including an endless screw on which is installed a linearly displaceable nut connected with slight play to an operating member of the electrical equipment. A torque limiter is inserted between the drive mechanism and the movement transformation mechanism. The torque limiter comprises a disk made of rough material integral with a worm screw and has component parts in the form of segments of a ring connected by springs clamping the said disk made of friction material. Applications: remote control of electric circuit-breakers.
Claims4
An electric motor-control device for electrical equipment having drive means including:
- electric motor means connected through a torque limiter for driving a movement transformation mechanism provided with a worm screw;
- a nut unit mounted on said worm screw and movable along said worm screw, said nut unit being connectable to an operating member of the electrical equipment to be controlled;
- said torque limiter being defined by an elastic connection between two rotating members, one connected to said drive means and the other to said movement transformation mechanism;
- and an accentric cam;
- said cam rotating with said worm screw and a drive member bearing against said cam, said cam being spring-mounted on a driven gear of said drive means, whereby said gear rotates freely about an axis common to said cam and said worm screw.
Dependencies are inferred from the claim text.