US4769579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flicker-control device with polarized lamp
Assignee: Individual
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Filing: 1986-09-08
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Granted: 1988-09-06
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Expires: 2006-09-08
Abstract
Abstract This invention utilizes the property of diodes to judge positive/negative voltage, and connecting general incandescent lamps in parallel to combine, as lamp-strings, with each being polarized. The lamp-string is assembled with flicker-control device, a power supply using AC source which offers direct current with positive and negative variation to provide an assembly of a flicker-control device and lamp-strings for advertisement, decoration and other applications and a flickering function.
Inventors
- 👤 Tom Jou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:53
CPC Classifications
H; H01; H01R; H01R33/00; H01R33/945; H05; H05B; H05B47/00; H05B47/10; H05B47/155
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
227 words
A polarity lamp assembly comprising: supply means for receiving an AC power supply voltage; positive polarity lamp means, having a first input connected to said supply means and a second input, for producing light during positive cycles of the AC power supply voltage; negative polarity lamp means, having a first input connected to said supply means and a second input, for producing light; non-polarized lamp means, having a first input connected to said supply means and a second input, for producing light during positive and negative cycles of the AC power supply voltage; a first SCR having an anode connected to said supply means, a cathode connected to each of said second inputs, and a control input; a second SCR having an anode connected to said cathode of said first SCR, a cathode connected to said supply means and a control input; oscillator trigger means, operatively connected between said control inputs of said first and second SCRs and to each of said second inputs, for alternately applying a control voltage to said control inputs so as to alternately light said positive and negative polarity lamp means, said oscillator trigger means comprising a multivibrator; and, trigger means, operatively connected to said oscillator trigger means for providing a trigger signal to control the operation of said oscillator trigger means, said multivibrator including optoisolator means for receiving said trigger signal.
Claim 2
Dependent Claim
227 words
A polarity lamp assembly comprising: supply means for receiving an AC power supply voltage; positive polarity lamp means, having a first input connected to said supply means and a second input, for producing light during positive cycles of the AC power supply voltage; negative polarity lamp means, having a first input connected to said supply means and a second input, for producing light; non-polarized lamp means, having a first input connected to said supply means and a second input, for producing light during positive and negative cycles of the AC power supply voltage; a first SCR having an anode connected to said supply means, a cathode connected to each of said second inputs, and a control input; a second SCR having an anode connected to said cathode of said first SCR, a cathode connected to said supply means and a control input; oscillator trigger means, operatively connected between said control inputs of said first and second SCRs and to each of said second inputs, for alternately applying a control voltage to said control inputs so as to alternately light said positive and negative polarity lamp means, said oscillator trigger means comprising a multivibrator; and, trigger means, operatively connected to said oscillator trigger means for providing a trigger signal to control the operation of said oscillator trigger means, said multivibrator including optoisolator means for receiving said trigger signal.
Claim 3
Dependent Claim
17 words
A polarity lamp assembly according to claim 1, wherein said multivibrator operates at less than 3 Hz.
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) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |