US5204573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-dimensional pointing motor
Assignee: Vision Applications Inc
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Filing: 1991-07-17
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Granted: 1993-04-20
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Expires: 2011-07-17
Abstract
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.
Inventors
- 👤 Benjamin B. Bederson
- 👤 Richard S. Wallace
- 👤 Eric L. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:25
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/03; H02K41/031; H02K41/035; H02K41/0352; H02K41/0354; H02K2201/00; H02K2201/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
163 words
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.
Claim 2
Dependent Claim
163 words
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.
Claim 3
Dependent Claim
17 words
A motor as in claim 1 wherein the planes of the coils are orthogonal to each other.
Claim 4
Dependent Claim
15 words
A motor as in claim 1 wherein the rotor body carries a charge coupled device.
Claim 5
Dependent Claim
17 words
A motor as in claim 1 wherein said two-dimensional motor is less then one cubic-inch in size.
Claim 6
Dependent Claim
37 words
A motor as in claim 1 wherein said gimbal means includes a first axle rotatably mounted therein and a second rotatably mounted axle orthogonal to the first axle; said rotor body being fixed to said second axle.
Claim 7
Dependent Claim
16 words
A motor as in claim 1 wherein said magnetic field means includes a rare earth magnet.
Claim 8
Dependent Claim
15 words
A motor as in claim 6 wherein the magnet is selected from neodynium-iron-boron and samarium-cobalt.
Claim 9
Dependent Claim
23 words
A motor as in claim 1 wherein said current means includes controller means to supply pulse-width modulated current pulses individually to each coil.
Claim 10
Dependent Claim
29 words
A motor as in claim 1 which is a pointer motor wherein said tilting motion is a maximum of 180° and said panning motion is a maximum of 180°.
Claim 11
Dependent Claim
28 words
A motor as in claim 1 wherein the magnetic field means includes two permanent magnets positioned on said base and being on opposite sides of said rotor body.
Claim 12
Dependent Claim
18 words
A motor as in claim 7 wherein said base is a magnetic flux return path for said magnets.
Claim 13
Dependent Claim
105 words
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.
Claim 14
Dependent Claim
105 words
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.
Claim 15
Dependent Claim
17 words
A motor as in claim 12 wherein the planes of the coils are orthogonal to each other.
Claim 16
Dependent Claim
15 words
A motor as in claim 12 wherein the rotor body carries a charge coupling device.
Claim 17
Dependent Claim
18 words
A motor as in claim 12 wherein said two-dimensional motor is less than one cubic inch in size.
Claim 18
Dependent Claim
14 words
A motor as in claim 12 wherein said magnet is a rare earth magnet.
Claim 19
Dependent Claim
15 words
A motor as in claim 16 wherein said magnet is selected from neodynium-iron-boron and samarium-cobalt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-19 | 1996-10-19 | 1997-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-19 | 2000-10-19 | 2001-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-19 | 2004-10-19 | 2005-04-20 | $7700.00 | Window Closed / Lapsed |