US3909670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light emitting system
Assignee: Soken Inc
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Filing: 1974-06-25
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Granted: 1975-09-30
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Expires: 1994-06-25
Abstract
Abstract There is provided a light emitting system comprising an oscillator for generating oscillations at a high frequency, a fixed coil adapted to be energized by the output of the oscillator, a movable coil electromagnetically coupled with the fixed coil and adapted to be energized by the intermittent energization of the fixed coil, and a light emitting element connected to the movable coil to form a closed circuit and adapted to give light by an exciting current produced by the energization of the movable coil. The system thus eliminates the use of any mechanical sliding contact unit.
Inventors
- 👤 Hisato Wakamatsu
- 👤 Matatoyo Hinachi
- 👤 Masao Kotera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/08; G01D; G01D13/00; G01D13/22; G01P; G01P1/00; G01P1/07; G01P1/08; G01R1/20; H; H01; H01F; H01F38/00; H01F38/18; B; B60; B60K; B60K2360/00; B60K2360/60; B60K2360/68; B60K2360/698
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A light emitting system comprising: a fixed member; an oscillator mounted on said fixed member oscillating at a high frequency; a fixed coil mounted on said fixed member and connected electrically to the output terminals of said oscillator, said fixed coil being energized by the output thereof; a power source mounted on said fixed member and connected to said oscillator to supply power thereto; a moving member movable relative to said fixed coil; a movable coil mounted on said moving member and electromagnetically coupled with said fixed coil; and a light emitting element mounted on said moving member and connected to said movable coil to generate light be na excitation current from said movable coil.
Claim 2
Dependent Claim
115 words
A light emitting system comprising: a fixed member; an oscillator mounted on said fixed member oscillating at a high frequency; a fixed coil mounted on said fixed member and connected electrically to the output terminals of said oscillator, said fixed coil being energized by the output thereof; a power source mounted on said fixed member and connected to said oscillator to supply power thereto; a moving member movable relative to said fixed coil; a movable coil mounted on said moving member and electromagnetically coupled with said fixed coil; and a light emitting element mounted on said moving member and connected to said movable coil to generate light be na excitation current from said movable coil.
Claim 3
Dependent Claim
42 words
A system according to claim 1, wherein said oscillator comprises an oscillator circuit composed of a ring oscillator having an odd number of NOT circuit stages connected in a circle, and an amplifier circuit for amplifying the output of said oscillator circuit.
Claim 4
Dependent Claim
18 words
A system according to claim 1, wherein said light emitting element is comprised of a light emitting diode.
Claim 5
Dependent Claim
30 words
A system according to claim 1, wherein said fixed member constitutes part of a vehicle body, and said moving member is comprised of a control knob mounted in the vehicle.
Claim 6
Dependent Claim
18 words
A system according to claim 4, wherein said light emitting element is comprised of a light emitting diode.
Claim 7
Dependent Claim
30 words
A system according to claim 1, wherein said fixed member constitutes part of a vehicle body, and said moving member constitutes a needle of a meter installed in the vehicle.
Claim 8
Dependent Claim
18 words
A system according to claim 6, wherein said light emitting element is comprised of a light emitting diode.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |