US4354142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for the pulsed illumination of a stroboscope ring
Assignee: USPHILLIPS Corp
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Filing: 1980-07-21
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Granted: 1982-10-12
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Expires: 2000-07-21
Abstract
Abstract A circuit arrangement for the pulsed illumination of a stroboscope ring of a record player is formed from a pulsating direct voltage by rectification, and the pulsating direct voltage is applied to a series connection of an ohmic resistor and a light emitting diode.
Inventors
- 👤 Alfred Seitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
H; H05; H05B; H05B45/00; H05B45/30; H05B45/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A circuit arrangement for pulsed illumination of a stroboscopic ring used for a record player comprising an alternating voltage source, means connected to said alternating voltage source for providing a pulsating direct voltage, a series circuit connected to said means and including a first resistor, a light emitting diode, and a parallel circuit of a second resistor and a capacitor, a stroboscope ring receiving periodic light pulses from said light emitting diode to produce stroboscopic images, and a smoothing circuit connected in parallel with said series circuit, said smoothing circuit including a diode for isolating said smoothing circuit from said pulsating direct voltage and a second parallel circuit of a load and second capacitor.
Claim 2
Dependent Claim
114 words
A circuit arrangement for pulsed illumination of a stroboscopic ring used for a record player comprising an alternating voltage source, means connected to said alternating voltage source for providing a pulsating direct voltage, a series circuit connected to said means and including a first resistor, a light emitting diode, and a parallel circuit of a second resistor and a capacitor, a stroboscope ring receiving periodic light pulses from said light emitting diode to produce stroboscopic images, and a smoothing circuit connected in parallel with said series circuit, said smoothing circuit including a diode for isolating said smoothing circuit from said pulsating direct voltage and a second parallel circuit of a load and second capacitor.
Claim 3
Dependent Claim
14 words
A circuit arrangement according to claim 1, wherein said means includes a rectifier bridge.
Claim 4
Dependent Claim
24 words
A circuit arrangement according to claim 1, wherein said load may be a motor, a control or an amplifier circuit of a record player.
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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |