PLURAL MOTOR-DRIVEN MIRROR

• US 3,576,359 A
• Filed: 06/24/1969
• Issued: 04/27/1971
• Est. Priority Date: 06/25/1968
• Status: Expired due to Term

• Current Assignee: Cosh Harry Jose
• Original Assignee: Cosh Harry Jose
• Inventors: COSH HARRY JOSE
• Application Number:
  US04/836,022
• Time in Patent Office: 672 Days
• US Class Current: 359/877
• CPC Class Codes: H01F 7/06 Electromagnets; Actuators including electromagnets electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28
• CPC Class Codes: H01F 7/20 without armatures cores H01F3/00; coils H01F5/00 ; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381

Abstract

Apparatus is provided for producing relative movement between a supporting member and a workpiece, for example, automobile equipment such as a rear view mirror, responsive to control from a remote position. A movement transmitting plate is mounted for movement on the supporting member and is displaced by a plurality of electric motor, responsive to remote control, relative to the supporting member. The workpiece is thereafter moved in a plane normal to the plane of the supporting member into engagement with the displaced transmitting plate. Means are provided in response to such engagement for causing movement of the transmitting plate in a direction opposite its original displacement thereby imparting a corresponding relative motion to said workpiece.

Claims

1. Apparatus for producing relative motion of a workpiece comprising supporting means, movement transmitting means mounted on said supporting means, means for displacing the movement transmitting means relative to the supporting means, means for moving a workpiece substantially perpendicular to the direction of displacement of the movement transmitting means to engage therewith when the movement transmitting means is so displaced, and means associated with the movement transmitting means to cause relative motion between the supporting means and the movement transmitting means in a direction opposite its displacement when the movement transmitting means is engaged by the workpiece to thereby impart a corresponding relative motion between said workpiece and said support means.

2. Apparatus as claimed in claim 1 wherein the movement transmitting means comprises a plate mounted substantially parallel to and spaced from the supporting means by a plurality of spherical bearings engaged in corresponding depressions formed in the supporting means and the movement transmitting plate, the spherical bearings being adapted to ride up the depressions when the movement transmitting plate is displaced and reengage in the depressions when the movement transmitting plate is engaged by the workpiece.

3. Apparatus as claimed in claim 2 wherein a plurality of electromagnets are mounted on said supporting means with associated pole pieces equispaced around and adjacent said movement transmitting means, and said movement transmitting means includes portions of magnetic material which are attractable towards any one of the pole pieces upon operation of the respective electromagnets to cause displacement of the movement transmitting means relative to the supporting means.

4. Apparatus as claimed in claim 3 wherein said workpiece comprises an armature mounted substantially parallel to but spaced from said supporting means and movable against spring biasing means towards said pole pieces upon simultaneous operation of all the electromagnets, said armature having friction surface means to engage with said movement transmitting means to prevent relative lateral movement therebetween when in engagement.

5. Apparatus as claimed in claim 4 wherein said armature is formed with a centrally disposed aperture to receive a spindle pivotally mounted on a yoke connecting said electromagnets and spaced from said supporting means, and means are provided for fastening a rearview mirror to said support means and further means are provided for supporting said spindle in a rearview mirror support bracket so that relative lateral movement of said armature to said support means causes said mirror to move from one position to another relative to said mirror support bracket.

6. Apparatus as claimed in claim 5 including means for preventing rotational movement of said supporting means relative to the axis of said spindle.

7. Apparatus as claimed in claim 3 wherein said workpiece comprises a magnetic clutch mounted on a frame member fixed to but spaced from said supporting means, said magnetic clutch including a plurality of static clutch members fixed to said frame member and a plurality of movable clutch discs each mounted between a pair of static clutch members and engaged on a boss extending from a primary armature means, resilient means for mounting said boss to said frame member, and releasable means for clamping said static and movable clutch members together and for releasing said clamping action when said primary armature is moved toward and engaged with said movement transmitting plate upon simultaneous operation of the said electromagnets to thereby permit relative lateral movement between said movable and static clutch members.

8. Apparatus as claimed in claim 1 wherein said movement transmitting means comprises an elongated arched spring member having end portions slidably mounted on said supporting member, armature means fixed to each end portion and a pole piece of an electromagnet mounted on the supporting means adjacent each end portion, means for selectively energizing one of the electromagnets to attract one of the armature means to cause the spring member to be displaced from a central position to a position whereat one of the armature means contacts the associated pole piece, and means for simultaneously energizing both electromagnets to move a magnetic workpiece perpendicularly toward the pole pieces to engage and compress said spring member thereby spreading the end portion thereof not engaged against one pole piece toward the other pole piece and simultaneously moving the engaged workpiece in the direction of the other pole piece.

9. Apparatus as claimed in claim 8 wherein resilient biasing means biases said workpiece in a perpendicular direction away from said pole pieces, and guide means are provided to locate said workpiece in a position adjacent to but spaced from said spring member.

10. Apparatus for producing relative motion of a workpiece comprising a supporting member, four electromagnets mounted symmetrically on said supporting member with their cores extending from one side of and perpendicular to the plane of said supporting member, pole pieces on the cores and extending from the other side of the supporting member, a yoke on the free ends of the cores spaced from and substantially parallel to the supporting member, a movement transmitting plate of magnetic material mounted between said pole pieces substantially parallel to the supporting member on four spherical bearings engaged in depressions in both the supporting member and the transmitting plate, spring means supporting said transmitting plate in engagement with said bearings, frame means for supporting said workpiece adjacent to but spaced from said transmitting plate, and means for supplying electrical current initially to at least one of the said coils to produce a magnetic field to attract said transmitting plate toward at least one associated pole piece so that the spherical bearings ride up the depressions, and to then supply electrical current to all said coils simultaneously to produce a magnetic field to attract said workpiece toward said pole pieces so that it engages with said transmitting plate to cause the spherical bearings to reengage in the depressions thereby producing a relative movement between said movement transmitting plate and said supporting member and imparting a corresponding relative movement to the workpiece engaged with the movement transmitting plate.