US3666232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for reducing the response time of magnetic valves
Assignee: Robert Bosch GmbH
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Filing: 1970-04-14
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Granted: 1972-05-30
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Expires: 1990-04-14
Abstract
Abstract A method and apparatus for reducing the response times of electromagnetically controlled valves. The operating coil of the valve has a center tap connected to a D.C. supply voltage, whereas the end terminals of the coil are each connected to the collectors of two power transistors. The base supply voltages for the power transistors are derived from a voltage divider, and a control transistor has its emitter-collector path connected across the base voltage supply of the power transistors. The power transistors are connected to function as an astable multivibrator which is turned on and off by the control transistor. The astable multivibrator provides rectangular-shaped alternating voltage to the operating coil of the valve for demagnetizing the valve before or after operation of actuation of the valve.
Inventors
- 👤 Kurt Melcher
- 👤 Wilhelm Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:56
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/18; H01F7/1805; H01F7/1811; F; F02; F02D; F02D41/00; F02D41/20; F02M; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/08; F02D2041/202; F02D2041/2044; F02D2041/2068; F02D2041/2072; F02D2041/2079
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
210 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valVe, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangularshaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; voltage dividing means connected to each base of said power transistors for providing a supply voltage thereto; and a source of operating voltage connected to said voltage dividing means.
Claim 2
Dependent Claim
210 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valVe, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangularshaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; voltage dividing means connected to each base of said power transistors for providing a supply voltage thereto; and a source of operating voltage connected to said voltage dividing means.
Claim 3
Dependent Claim
279 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valve, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangular-shaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; voltage dividing means connected to each base of said power transistors for providing base supply voltage thereto; a source of operating voltage connected to said voltage dividing means, said voltage dividing means comprising a first resistor connected to said source of operating voltage, a second resistor connected between said first resistor and the base of one of said power transistors, and a third resistor connected between said first resistor and the base of the other one of said power transistors, said first transistor having one terminal connected to a terminal of each of said second and third resistors.
Claim 4
Dependent Claim
279 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valve, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangular-shaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; voltage dividing means connected to each base of said power transistors for providing base supply voltage thereto; a source of operating voltage connected to said voltage dividing means, said voltage dividing means comprising a first resistor connected to said source of operating voltage, a second resistor connected between said first resistor and the base of one of said power transistors, and a third resistor connected between said first resistor and the base of the other one of said power transistors, said first transistor having one terminal connected to a terminal of each of said second and third resistors.
Claim 5
Dependent Claim
227 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valve, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangular-shaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; and a source of D.C. operating voltage, said coil for operating said valve being a center tapped coil with center tap connected to said source of D.C. oPerating voltage, each end terminal of said center tapped coil being connected to one collector of said power transistors.
Claim 6
Dependent Claim
227 words
An arrangement for reducing the response time of a magnetic valve comprising, in combination, an electromagnetic coil in said magnetic valve for operating said valve upon applying an actuating signal to said coil; a source of alternating voltage providing an alternating voltage of predetermined frequency; connecting means between said source of alternating voltage and said electromagnetic coil for applying said voltage to said coil before or after operation of said valve, so that said valve is de-magnetized through application of said alternating voltage to said coil, whereby residual magnetism in said electromagnetic coil is substantially removed through said demagnetization of said valve prior to a subsequent operation of said valve, said residual magnetism increasing the response time of said valve to said actuating signal, said source of alternating voltage comprising an oscillator; controlling means connected to said oscillator for turning said oscillator on and off, the output voltage of said oscillator being substantially rectangular-shaped, said oscillator comprising an astable multivibrator, said astable multivibrator comprising two power transistors and a control transistor connected across the base supply voltage for said power transistors; and a source of D.C. operating voltage, said coil for operating said valve being a center tapped coil with center tap connected to said source of D.C. oPerating voltage, each end terminal of said center tapped coil being connected to one collector of said power transistors.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |