Patent US3582719A successfully refreshed from Google Patents.
US3582719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forcing circuit for inductors
Assignee: Stearns Electric Corp
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Filing: 1969-06-23
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Granted: 1971-06-01
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Expires: 1989-06-23
Abstract
Abstract For developing forcing current in a circuit in which prompt electrical response in inductive loads is desirable, a plurality of capacitances are charged in parallel at the working voltage of the source. When forcing voltage is required, the capacitances are disconnected from their parallel charging lines and connected in series for forcing purposes to supply the resulting high voltage into the circuit which exhibits the inductive property of opposing change in current. When two such circuits are to be forced in alternation, means is provided for dissipating the energy in one circuit concurrently with delivery of forcing voltage into the other. Versatility is enhanced by connecting the respective coils to separate sockets into which various capacitances, potentiometers and/or suppression units are interchangeably plugged.
Inventors
- 👤 Leo L Stuckens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/18; H01F7/1805; H01F7/1816; H02; H02M; H02M3/00; H02M3/02; H02M3/16; H02M3/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
In a circuit having inductance, forcing means comprising a plurality of capacitances, a source of working voltage for said circuit, switching means for connecting said source to the circuit and to the capacitances in parallel, and switching means for selectively breaking the connection in parallel and connecting said capacitances in series to said circuit, said circuit including a rectifier, a relay coil, a plurality of electromagnetic windings, means for dissipating energy from a winding, said switching means being controlled by the relay coil and including means for alternately connecting energy dissipating means to respective windings, there being a plurality of capacitances for each of said electromagnetic windings, said switching means including means for connecting the source to the capacitances for one such winding and for connecting said last capacitances in parallel at a time when the energy dissipating means is connected to another winding, and means for connecting the capacitances in series to a respective winding which is connected to said source and is disconnected from the energy dissipating means.
Claim 2
Dependent Claim
170 words
In a circuit having inductance, forcing means comprising a plurality of capacitances, a source of working voltage for said circuit, switching means for connecting said source to the circuit and to the capacitances in parallel, and switching means for selectively breaking the connection in parallel and connecting said capacitances in series to said circuit, said circuit including a rectifier, a relay coil, a plurality of electromagnetic windings, means for dissipating energy from a winding, said switching means being controlled by the relay coil and including means for alternately connecting energy dissipating means to respective windings, there being a plurality of capacitances for each of said electromagnetic windings, said switching means including means for connecting the source to the capacitances for one such winding and for connecting said last capacitances in parallel at a time when the energy dissipating means is connected to another winding, and means for connecting the capacitances in series to a respective winding which is connected to said source and is disconnected from the energy dissipating means.
Claim 3
Dependent Claim
110 words
A circuit comprising the combination with a clutch winding and a brake winding, of a rectifier, a relay including a coil and a control switch, a pair of capacitances for each said winding, current control means for directing current from said rectifier in parallel through one pair of said capacitances, control means for directing current in series through the other pair of capacitances and through the other said winding, and means for interchanging the connections of said capacitances for directing current from said rectifier in parallel through the second set of capacitances while connecting the first set of capacitances in series with each other and with the first said winding.
Claim 4
Dependent Claim
110 words
A circuit comprising the combination with a clutch winding and a brake winding, of a rectifier, a relay including a coil and a control switch, a pair of capacitances for each said winding, current control means for directing current from said rectifier in parallel through one pair of said capacitances, control means for directing current in series through the other pair of capacitances and through the other said winding, and means for interchanging the connections of said capacitances for directing current from said rectifier in parallel through the second set of capacitances while connecting the first set of capacitances in series with each other and with the first said winding.
Claim 5
Dependent Claim
45 words
A circuit according to claim 2 in further combination with means for selectively dissipating energy from the winding to which the capacitances are not connected in series, and during the parallel connection to the rectifier of the pair of capacitances for the last mentioned winding.
Claim 6
Dependent Claim
112 words
The combination with a current source, of two circuits each having an inductance and each having forcing means comprising a plurality of capacitances, switching means for connecting said source and the said capacitances of one of said circuits in parallel and for connecting the capacitances of the other of said circuits in series to the inductance thereof, said switching means including means for reversing the connections to connect said source to the capacitances of said last mentioned circuit in parallel and for connecting the capacitances of the first mentioned circuit in series to its respective inductance, said switching means further including diodes for isolating parallel-connected capacitances from the voltage of series-connected capacitances.
Claim 7
Dependent Claim
112 words
The combination with a current source, of two circuits each having an inductance and each having forcing means comprising a plurality of capacitances, switching means for connecting said source and the said capacitances of one of said circuits in parallel and for connecting the capacitances of the other of said circuits in series to the inductance thereof, said switching means including means for reversing the connections to connect said source to the capacitances of said last mentioned circuit in parallel and for connecting the capacitances of the first mentioned circuit in series to its respective inductance, said switching means further including diodes for isolating parallel-connected capacitances from the voltage of series-connected capacitances.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |