US4088908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric position sensor of step motor
Assignee: Individual
•
Filing: 1976-12-27
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Granted: 1978-05-09
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Expires: 1996-12-27
Abstract
Abstract In a photoelectric position sensor of a step motor a mirror pyramid is placed across the light beam from a light source and secured on the shaft of the step motor. The faces of the mirror pyramid reflect the light beam to a faceted mirror reflector. The light beam is reflected from a respective facet of the mirror reflector and transferred to a photoelectric receiver by means of light guides. The design of the sensor ensures high resolution and a small moment of load inertia produced by the mirror pyramid on the shaft of the step motor.
Inventors
- 👤 Valery F. Gumen
- 👤 Tatyana V. Kalininskaya
- 👤 Robert N. Loparev
- 👤 German V. Sladkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:01
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
223 words
In combination a step motor and a photoelectric position sensor, comprising: a step motor having a shaft and having a housing or shell; said photoelectric position sensor of said step motor comprising a casing secured on said shell of said step motor; a light source of said sensor located in said casing of said sensor; a light beam from said light source; a mirror pyramid of said sensor, secured on said shaft on said step motor across said light beam; faces of said mirror pyramid, reflecting said light beam; a faceted mirror reflector of said sensor, located in said casing of said sensor across said light beam reflected from a respective said face of said mirror pyramid; a group of light guides of said sensor, being secured to said casing of said sensor, and their number being determined by the ratio between the number of positions for one revolution of said step motor and the product of the number of said faces of said mirror pyramid by the number of the facets of said mirror reflector; the first ends of said light guides, being located across said light beam reflected from said respective facet of said mirror reflectors; and a photoelectric receiver being located in said casing of said sensor across said light beam emerging from the other ends of said light guides.
Claim 2
Dependent Claim
223 words
In combination a step motor and a photoelectric position sensor, comprising: a step motor having a shaft and having a housing or shell; said photoelectric position sensor of said step motor comprising a casing secured on said shell of said step motor; a light source of said sensor located in said casing of said sensor; a light beam from said light source; a mirror pyramid of said sensor, secured on said shaft on said step motor across said light beam; faces of said mirror pyramid, reflecting said light beam; a faceted mirror reflector of said sensor, located in said casing of said sensor across said light beam reflected from a respective said face of said mirror pyramid; a group of light guides of said sensor, being secured to said casing of said sensor, and their number being determined by the ratio between the number of positions for one revolution of said step motor and the product of the number of said faces of said mirror pyramid by the number of the facets of said mirror reflector; the first ends of said light guides, being located across said light beam reflected from said respective facet of said mirror reflectors; and a photoelectric receiver being located in said casing of said sensor across said light beam emerging from the other ends of said light guides.
Claim 3
Dependent Claim
45 words
The combination as claimed in claim 1, comprising: a condenser lens located in said casing of said sensor between said ends of said light guides facing said photoelectric receiver and said photoelectric receiver across said light beam emerging from said ends of said light guides.
Claim 4
Dependent Claim
147 words
The combination according to claim 1, further comprising an additional light source located in said casing of said sensor and having a light beam directed to said mirror pyramid, an additional faceted mirror reflector in said casing across from said light beam reflected from a respective said face of said mirror pyramid; a further group of light guides in said casing, their number being equal to said other group of light guides; the first ends of said further group of light guides, being located across the additional light beam reflected from said respective facet of said additional mirror reflector; and an additional photoelectric receiver located in said casing of said sensor across said additional light beam emerging from the other ends of said further group of light guides; whereby said photoelectric position sensor is sensitive to the direction of rotation of said shaft of said step motor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |