Patent US3972036A successfully refreshed from Google Patents.
US3972036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for rapid switching of a high frequency magnetic field
Assignee: Siemens AG
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Filing: 1974-04-08
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Granted: 1976-07-27
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Expires: 1994-04-08
Abstract
Abstract An arrangement for rapidly switching a high frequency magnetic field includes parallel resonant circuits which are supplied with sine or cosine current, respectively, comprise coils which are arranged cross-wise in respect of each other and a switching member is connected parallel to each coil. The switching member comprises a controllable voltage source which is connected by way of an RC circuit to an end of the resonant circuit, and a transistor is connected between the other end of the resonant circuit and a reference potential.
Inventors
- 👤 Franz Navratil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:27
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/085; H; H03; H03B; H03B2200/00; H03B2200/006; H03B2200/0078; H03B2200/0098
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential.
Claim 2
Dependent Claim
125 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential.
Claim 3
Dependent Claim
48 words
An arrangement according to claim 1 wherein said switch is a transistor including a collector-emitter switching path connected to said resonant circuit and to said reference potential and a base, and a pulse transformer connected to said base and connected to receive control pulses for operating said transistor.
Claim 4
Dependent Claim
22 words
An arrangement according to claim 1 in combination with a domain transport store, said rotary magnetic field magnetically coupled to said store.
Claim 5
Dependent Claim
152 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, the capacitance of each of said parallel resonant circuits comprising a pair of serially connected capacitors connected to said high frequency generating means at the junction therebetween.
Claim 6
Dependent Claim
152 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, the capacitance of each of said parallel resonant circuits comprising a pair of serially connected capacitors connected to said high frequency generating means at the junction therebetween.
Claim 7
Dependent Claim
153 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, said timing circuit comprising a resistor connected in series between said controllable voltage source and the respective resonant circuit, and a capacitor connected in parallel to said resistor.
Claim 8
Dependent Claim
153 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, said timing circuit comprising a resistor connected in series between said controllable voltage source and the respective resonant circuit, and a capacitor connected in parallel to said resistor.
Claim 9
Dependent Claim
169 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, said timing circuit comprising a resistor connected in series between said controllable voltage source and the respective resonant circuit, and a capacitor connected in parallel with said resistor and having a capacitance which is larger than the capacitance of the respective parallel resonant circuit.
Claim 10
Dependent Claim
169 words
An arrangement for rapidly switching on and off a high frequency rotary magnetic field, comprising: a pair of crossed coils; high frequency generating means connected to said coils and feeding said coils a sine-shaped current which is out of phase by 90° at one coil with respect to the other, a separate capacitance connected across each of said coils to form respective parallel resonant circuits, and a pair of switching circuits connected in parallel to respective ones of said resonant circuits, each of said switching circuits comprising a controllable voltage source, a timing circuit connecting said controllable voltage source to one end of the respective parallel resonant circuit and a switch connecting the other end of the respective parallel resonant circuit to a reference potential, said timing circuit comprising a resistor connected in series between said controllable voltage source and the respective resonant circuit, and a capacitor connected in parallel with said resistor and having a capacitance which is larger than the capacitance of the respective parallel resonant circuit.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |