US4777359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position indicator with light emitter and two light sensors
Assignee: Individual
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Filing: 1987-08-31
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Granted: 1988-10-11
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Expires: 2007-08-31
Abstract
Abstract A switching device includes a contact movable between two positions, to selectively open and close an electrical path, and a multicolor light emitting diode for indicating different positions of the contact by respectively different colors. The multicolor light emitting diode directs a light beam which is reflected from the contact in accordance with its position on one of two light sensors. The color of the light beam is controlled in accordance with the outputs of the light sensors.
Inventors
- 👤 Karel Havel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:11
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/16; H01H9/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
249 words
A position sensing assembly comprising: a substantially flat elongated support; a first chamber secured to said support and having formed therein a cavity and a first light director for guiding a light beam to said cavity, said first light director defining a first angle with said support, a first light sensor being disposed in said cavity; a second chamber secured to said support and having formed therein a cavity and a second light director for guiding a light beam to said cavity, said second light director defining a second angle with said support, said first angle and said second angle being different, a second light sensor being disposed in said cavity; a third chamber secured to said support and having formed therein a cavity and a third light director for guiding a light beam from said cavity, said third light director defining a third angle with said support, a light source for emitting a light beam being disposed in said cavity; whereby the light beam emitted by said light source in said third chamber via said third light director may be reflected by a reflecting surface on an object adjacent to said third light director and may be directed either to said first chamber via said first light director onto said first light sensor, to said second chamber via said second light director onto said second light sensor, or in a different direction, in accordance with the angular position of said object with respect to said third light director.
Claim 2
Dependent Claim
249 words
A position sensing assembly comprising: a substantially flat elongated support; a first chamber secured to said support and having formed therein a cavity and a first light director for guiding a light beam to said cavity, said first light director defining a first angle with said support, a first light sensor being disposed in said cavity; a second chamber secured to said support and having formed therein a cavity and a second light director for guiding a light beam to said cavity, said second light director defining a second angle with said support, said first angle and said second angle being different, a second light sensor being disposed in said cavity; a third chamber secured to said support and having formed therein a cavity and a third light director for guiding a light beam from said cavity, said third light director defining a third angle with said support, a light source for emitting a light beam being disposed in said cavity; whereby the light beam emitted by said light source in said third chamber via said third light director may be reflected by a reflecting surface on an object adjacent to said third light director and may be directed either to said first chamber via said first light director onto said first light sensor, to said second chamber via said second light director onto said second light sensor, or in a different direction, in accordance with the angular position of said object with respect to said third light director.
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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |