US3845349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line synchronized strobe light
Assignee: Individual
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Filing: 1973-01-15
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Granted: 1974-10-29
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Expires: 1993-01-15
Abstract
Abstract A line synchronized strobe light including an adjustable voltage divider connected across an A. C. source to a diode at the division point thereof where the diode periodically charges up a capacitor. The capacitor is connected to discharge through a neon which is placed in electrostatic proximity with the input lead bearing the same polarity as the diode. When the neon reaches a triggering level it both discharges the capacitor and triggers an SCR connected to complete a circuit across a strobe light. The strobe light bulb is filled with a mixture of Helium and Argon in order to give both a fast turn off time and to limit the evaporation of the filament thereof.
Inventors
- 👤 T Liebman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
H; H05; H05B; H05B47/00; H05B47/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
Apparatus for producing light flashes at a predetermined frequency, comprising: voltage dropping means adapted to receive an A.C. signal for producing a reduced A.C. signal at a preselected ratio thereof; rectifying means connected to receive said reduced A.C. signal for passing signal segments of a predetermined polarity thereof; capacitive means connected to receive said signal segments for storing an electrical charge corresponding to the accumulated energy of said signal segments; first switching means connected at one end thereof to said capacitive means and said rectifying means including electrostatic coupling means responsive to said A.C. signal for switching said first switching means into conductive state upon a predetermined combination of the charge on said capacitive means and said A.C. signal; second switching means connected to be gated to the other end of said first switching means for conducting electrical signals upon being gated by said first switching means; and lighting means connected in series with said second switching means and in shunt across said A.C. signal for producing light when said second switching means is conducting.
Claim 2
Dependent Claim
175 words
Apparatus for producing light flashes at a predetermined frequency, comprising: voltage dropping means adapted to receive an A.C. signal for producing a reduced A.C. signal at a preselected ratio thereof; rectifying means connected to receive said reduced A.C. signal for passing signal segments of a predetermined polarity thereof; capacitive means connected to receive said signal segments for storing an electrical charge corresponding to the accumulated energy of said signal segments; first switching means connected at one end thereof to said capacitive means and said rectifying means including electrostatic coupling means responsive to said A.C. signal for switching said first switching means into conductive state upon a predetermined combination of the charge on said capacitive means and said A.C. signal; second switching means connected to be gated to the other end of said first switching means for conducting electrical signals upon being gated by said first switching means; and lighting means connected in series with said second switching means and in shunt across said A.C. signal for producing light when said second switching means is conducting.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1 wherein said first switching means including a neon lamp connected at one terminal thereof to said rectifying means and connected for gating said second switching means.
Claim 4
Dependent Claim
33 words
Apparatus according to claim 2 wherein said voltage dropping means includes a voltage divider adapted to be connected across said A. C. signal and connected at the division point to said rectifying means.
Claim 5
Dependent Claim
28 words
Apparatus according to claim 3 wherein said lighting means includes an incandescent light having a filament disposed in a transparent container filled with a predetermined mixture of gases.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 4 wherein said mixture of gases consists of a combination of 15 to 25% Argon and 75 to 85% Helium.
Claim 7
Dependent Claim
39 words
Apparatus according to claim 2 wherein said voltage dropping means comprises a circuit board including a positive and negative conductor adapted to be connected across an A. C. signal and voltage divider means connected in shunt across said conductors.
Claim 8
Dependent Claim
34 words
Apparatus according to claim 6 wherein said neon lamp is disposed in electrostatic proximity with said positive conductor and said rectifying means including a diode disposed to conduct positive signals from said voltage divider.
References Cited (Backward Citations)
US3517261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |