Patent US3668374A successfully refreshed from Google Patents.
US3668374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive circuit for pulsed inductive windings
Assignee: Veeder Industries Inc
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Filing: 1970-07-29
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Granted: 1972-06-06
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Expires: 1990-07-29
Abstract
Abstract A pulse forming drive circuit for a high speed counter actuated by a solenoid wherein a pulsing switch controls the energization of the solenoid. The drive circuit is connected in parallel with the solenoid and includes a capacitor and a resistor each connected across the solenoid and a rectifier connected in series with the capacitor and resistor to prevent the flow of current therethrough when the pulsing switch is closed but allows the flow of current therethrough when the magnetic switch is open to delay the normal voltage spike and then use the delayed voltage spike to promote the rapid decay of the magnetic field energy of the solenoid.
Inventors
- 👤 John G Gamble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:03
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A pulse forming drive circuit for a winding having a pulsing switch for controlling the energization of the winding, said drive circuit connected in parallel with said winding and comprising a capacitor to pass the current generated by the magnetic field energy of said winding when said pulsing switch is opened, means for effecting the delayed dissipation of the magnetic field energy of the winding, and means for blocking the flow of current through said drive circuit when said pulsing switch is closed.
Claim 2
Dependent Claim
83 words
A pulse forming drive circuit for a winding having a pulsing switch for controlling the energization of the winding, said drive circuit connected in parallel with said winding and comprising a capacitor to pass the current generated by the magnetic field energy of said winding when said pulsing switch is opened, means for effecting the delayed dissipation of the magnetic field energy of the winding, and means for blocking the flow of current through said drive circuit when said pulsing switch is closed.
Claim 3
Dependent Claim
22 words
A drive circuit as recited in claim 1 wherein said delayed dissipation means comprises a resistor connected in parallel with said capacitor.
Claim 4
Dependent Claim
15 words
A drive circuit as recited in claim 1 wherein said blocking means is a rectifier.
Claim 5
Dependent Claim
134 words
An electromagnetically powered high speed counter having a solenoid, a spring biased armature actuated by said solenoid, a pulsing switch actuated in accordance with the movements to be counted, and a pulse forming drive circuit for said solenoid connected in parallel therewith, said drive circuit comprising a rectifier to prevent the flow of current therethrough when the pulsing switch is closed, a capacitor in series with said rectifier and providing a low impedance path to pass the current generated by the magnetic field energy of said solenoid when said pulsing switch is opened and a resistance connected in parallel with said capacitor to rapidly dissipate the magnetic field energy of said solenoid to effect the release of said armature after the capacitor is charged to a voltage equal to the voltage across said solenoid.
Claim 6
Dependent Claim
134 words
An electromagnetically powered high speed counter having a solenoid, a spring biased armature actuated by said solenoid, a pulsing switch actuated in accordance with the movements to be counted, and a pulse forming drive circuit for said solenoid connected in parallel therewith, said drive circuit comprising a rectifier to prevent the flow of current therethrough when the pulsing switch is closed, a capacitor in series with said rectifier and providing a low impedance path to pass the current generated by the magnetic field energy of said solenoid when said pulsing switch is opened and a resistance connected in parallel with said capacitor to rapidly dissipate the magnetic field energy of said solenoid to effect the release of said armature after the capacitor is charged to a voltage equal to the voltage across said solenoid.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |