US3743914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half wave voltage divider
Assignee: Unisys Corp
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Filing: 1972-01-17
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Granted: 1973-07-03
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Expires: 1992-01-17
Abstract
Abstract An electrical circuit is provided in which a bank of capacitors is controllably charged in series and then discharged in parallel through the interaction of a voltage divider, a silicon controlled rectifier, and diode circuit elements to transform a sinusoidal line voltage into a half-wave pulse. The magnitude of the pulse is a function of the RMS line voltage input and the number of capacitors in the bank. This function may be expressed as 1/(k).V/n where V is the RMS line voltage input, n is the number of capacitors in the banks and k is the transformation and round-off error constant.
Inventors
- 👤 G Holz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:59
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A voltage reducing rectifier circuit for an alternating voltage source with respect to a reference potential comprising: a plurality of capacitors; a plurality of passive unidirectional means for connecting said capacitors in series between said reference potential and said alternating voltage source, each of said plurality of capacitors being connected between successive ones of said passive unidirectional means for charging said plurality of capacitors during a half-cycle of said alternating voltage source; a plurality of pairs of passive unidirectional means connected in parallel as an output circuit, each of said plurality of capacitors being also respectively connected between individual ones of said pairs of passive unidirectional means; and a single gate-controlled, gating means sensitive to the phase and magnitude of said alternating voltage source and connected to said output circuit, for completing a circuit for permitting discharge current to flow between said reference potential and said output circuit only during the other half-cycle of said voltage source.
Claim 2
Dependent Claim
157 words
A voltage reducing rectifier circuit for an alternating voltage source with respect to a reference potential comprising: a plurality of capacitors; a plurality of passive unidirectional means for connecting said capacitors in series between said reference potential and said alternating voltage source, each of said plurality of capacitors being connected between successive ones of said passive unidirectional means for charging said plurality of capacitors during a half-cycle of said alternating voltage source; a plurality of pairs of passive unidirectional means connected in parallel as an output circuit, each of said plurality of capacitors being also respectively connected between individual ones of said pairs of passive unidirectional means; and a single gate-controlled, gating means sensitive to the phase and magnitude of said alternating voltage source and connected to said output circuit, for completing a circuit for permitting discharge current to flow between said reference potential and said output circuit only during the other half-cycle of said voltage source.
Claim 3
Dependent Claim
24 words
The circuit of claim 1 wherein each of said unidirectional means includes a diode and wherein said plurality of capacitors are of equal value.
Claim 4
Dependent Claim
22 words
The circuit of claim 1 further including an output capacitor connected in parallel with said output circuit and said single gating means.
Claim 5
Dependent Claim
14 words
The circuit of claim 1 wherein said gating means includes controlled rectifier gating means.
Claim 6
Dependent Claim
45 words
The circuit of claim 4 including a voltage divider connected between said voltage source and said controlled rectifier gating means, said controlled rectifier gating means including a silicon controlled rectifier and said rectifier having its gate tied to an intermediate point of said voltage divider.
Claim 7
Dependent Claim
13 words
The circuit of claim 1 wherein said gating means includes transistor gating means.
Claim 8
Dependent Claim
68 words
The circuit of claim 6 wherein said transistor gating means includes a transistor and the rectifier circuit also includes a resistive voltage divider connected between said voltage source and said transistor and wherein said transistor has an emitter connected to an end of said divider and to said output circuit, a base connected to a mid-point of said divider, and a collector unidirectionally connected to said reference potential.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |