US3585444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy supply circuit
Assignee: SYMBOLIC DISPLAYS Inc 1762 MCGAW AVENUE IRVINE CALIFORNIA A CORP OF CALIFORNIA
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Filing: 1968-09-23
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Granted: 1971-06-15
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Expires: 1988-09-23
Abstract
Abstract A circuit for supplying a high energy discharge to a load, for example a strobotron. A capacitor is adapted to be charged from an alternating current source and to discharge its stored energy into the load. A half-wave rectifier permits charging of the capacitor only during each half-cycle forward pulse of the source current. A gated conductive device in series with the capacitor can, by suitable control of the gate and cathode voltages, be made to (1) delay the delivery of charging current to the capacitor for a finite interval after initiation of the halfcycle pulse, (2) limit the maximum instantaneous charging current delivered to the capacitor, and/or (3) increase the average charging current delivered to the capacitor as the latter accumulates charge.
Inventors
- 👤 Paul E Crowley
- 👤 James B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:09
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A circuit for supplying energy to a load, comprising: an alternating potential source; first capacitive means connected to discharge energy into said load; half-wave rectifier means; and circuit means including said rectifier means, a controlled conductive element and an RC circuit means adapted to permit the charging of said first capacitive means only during a terminal portion of a half-cycle of said source.
Claim 2
Dependent Claim
63 words
A circuit for supplying energy to a load, comprising: an alternating potential source; first capacitive means connected to discharge energy into said load; half-wave rectifier means; and circuit means including said rectifier means, a controlled conductive element and an RC circuit means adapted to permit the charging of said first capacitive means only during a terminal portion of a half-cycle of said source.
Claim 3
Dependent Claim
23 words
The circuit of claim 1 wherein said circuit means includes means for limiting the instantaneous maximum charging current delivered to said capacitive means.
Claim 4
Dependent Claim
38 words
The circuit of claim 2 wherein said current limiting means is further adapted to permit an increase in the average charging current delivered to said first capacitive means as the charge accumulated in said first capacitive means increases.
Claim 5
Dependent Claim
59 words
The circuit of claim 1 wherein said controlled conductive element includes a cathode and a control electrode, said element being connected in series with said rectifier and said first capacitive means, said element permitting delivery of charging current to said first capacitive means only when at least a predetermined voltage differential exists between said cathode and said control electrode.
Claim 6
Dependent Claim
28 words
The circuit of claim 4 wherein said RC circuit means provides a preselected time delay between the initiation of said half-cycle and the establishment of said voltage differential.
Claim 7
Dependent Claim
32 words
The circuit of claim 4 wherein said circuit means includes current limiting means for disestablishing said voltage differential when the charging current delivered to said first capacitive means reaches a predetermined maximum.
Claim 8
Dependent Claim
30 words
The circuit of claim 4 wherein said circuit means includes means responsive to the charging of said first capacitive means to control the frequency of establishment of said voltage differential.
Claim 9
Dependent Claim
26 words
The circuit of claim 6 including voltage reference means connected across said first capacitive means for limiting the maximum voltage drop across said first capacitive means.
Claim 10
Dependent Claim
132 words
A strobotron system comprising: a strobotron having a control electrode; means for supplying a high voltage pulse to said control electrode at selected intervals to fire said strobotron; a capacitor adapted to discharge stored energy to said strobotron during firing thereof; a source of alternating current; a hAlf-wave rectifier in series with said source and said capacitor; a gated rectifier in series with said source, said half-wave rectifier and said capacitor; a time delay circuit for controlling the gate voltage of said gated rectifier in delayed response to the initiation of current flow through said half-wave rectifier; a current limiting circuit for controlling said gate voltage in response to current through said gated rectifier; and a frequency control circuit for controlling said gate voltage in response to the charging of said capacitor.
Claim 11
Dependent Claim
132 words
A strobotron system comprising: a strobotron having a control electrode; means for supplying a high voltage pulse to said control electrode at selected intervals to fire said strobotron; a capacitor adapted to discharge stored energy to said strobotron during firing thereof; a source of alternating current; a hAlf-wave rectifier in series with said source and said capacitor; a gated rectifier in series with said source, said half-wave rectifier and said capacitor; a time delay circuit for controlling the gate voltage of said gated rectifier in delayed response to the initiation of current flow through said half-wave rectifier; a current limiting circuit for controlling said gate voltage in response to current through said gated rectifier; and a frequency control circuit for controlling said gate voltage in response to the charging of said capacitor.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |