Actuators
First Claim
1. A bistable actuator of generally cylindrical shape comprising a magnetic member moveably mounted, in a housing of magnetic material, for movement between two positions, in each of which such member is positively located adjacent a respective permanent axially magnetized ring magnet of samarian cobalt, pole piece means centrally located between the permanent magnets and extending from said housing to within a slot formed in the moveably mounted member and a separate coil located within the housing between the pole piece means and each permanent magnet for energisation to at least counteract the magnetic flux produced by the adjacent permanent magnet and allow movement of said member.
0 Assignments
0 Petitions
Accused Products
Abstract
A bistable actuator comprising a magnetic member moveably mounted, in a housing of magnetic material, for movement between two positions. In each position such member is positively located adjacent a respective permanent magnet. Pole piece means is centrally located between the permanent magnets and extending from said housing to adjacent the moveably mounted member preferably extending to within a slot formed in the member. A separate coil is located within the housing between the pole piece means and each permanent magnet for energization to at least counteract the magnetic flux produced by the adjacent permanent magnet and allow movement of the member.
139 Citations
12 Claims
- 1. A bistable actuator of generally cylindrical shape comprising a magnetic member moveably mounted, in a housing of magnetic material, for movement between two positions, in each of which such member is positively located adjacent a respective permanent axially magnetized ring magnet of samarian cobalt, pole piece means centrally located between the permanent magnets and extending from said housing to within a slot formed in the moveably mounted member and a separate coil located within the housing between the pole piece means and each permanent magnet for energisation to at least counteract the magnetic flux produced by the adjacent permanent magnet and allow movement of said member.
Specification