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US 5,204,573 AGranted
Two-dimensional pointing motor
AssigneeVision Applications, Inc.
InventorsBenjamin B. Bederson, Richard S. Wallace, Eric L. Schwartz
Life of this patent
Estimating the term…
Abstract
A 2-D pointer motor provides for panning (sideways actuate motion) and tilt (yaw motion) and may be made smaller than one-cubic inch. The motor is preferably controlled by a microcomputer based controller using pulse-width modulation (PWM) to separately control each of its three coils. The coils are arranged orthogonally to provide a single unified torque vector which turns the rotor and accurately points it in the desired directions. The motor is especially adapted to carry a sensor such as a CCD array.
Claims17
A two-dimensional motor comprising:
- (a) a rotor body;
- (b) a first conductive coil wound around and on said rotor body and laying in a first plane;
- a second conductive coil wound around and on said rotor body and laying in a second plane;
- a third conductive coil wound around and on said rotor body and laying in a third plane;
- said first, second and third planes being linearly independent to each other;
- (c) a base to support portions of the motor;
- (d) a magnetic field means mounted on said base to produce a directed magnetic field through said rotor body an to induce torque on said rotor body when current flows in said coils;
- (e) gimbal means mounted on said base to pivotly mount said rotor body to provide both tilting motion and panning motion to said rotor body;
- (f) current means to provide selected electrical current to said coils and to thereby control the tilting and panning movement of the rotor body.
6 more elements
A two-dimensional motor comprising
- (a) a rotor body having a permanent magnet;
- (b) a first, a second, and a third conductive coils wound to surround the rotor body and spaced therefrom;
- the first, second and third conductive coils laying in respective first, second and third planes, and the first, second and third planes being linearly independent to each other;
- (c) gimbal means mounted to pivotly mount the rotor body to provide both tilting and panning action to said rotor body and;
- (d) current means to provide selected electrical current to said coils and to thereby control the tilting and panning action of the rotor body.
2 more elements
Dependencies are inferred from the claim text.