US3665271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving circuit for a time-keeping device
Assignee: Gebrueder Junghans GmbH
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Filing: 1970-09-08
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Granted: 1972-05-23
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Expires: 1990-09-08
Abstract
Abstract A driving circuit for initiating oscillatory or rotary movement in a mechanical system wherein a control coil and driving coil are mounted in coupled relationship between opposing pole faces of a permanent magnet system and an initial driving pulse is provided to the driving coil by a transistor circuit which includes a capacitance charged through a resistance from a voltage source. The control coil generates pulses to operate the transistor circuit and provide output driving pulses to the driving coil to maintain the oscillatory or rotary movement of the system.
Inventors
- 👤 Friedrich Assmus
- 👤 Wolfgang Ganter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:04
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067; G04C3/16; G04D; G04D3/00; G04D3/0074
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A drive circuit for rotating a mechanical system, comprising; spaced permanent magnets each having poles of opposite polarity in opposed relationship and forming an air gap therebetween, a coreless driving coil and a coreless control coil mounted in coupled relationship and positioned in said air gap to intersect the magnetic flux passing between said magnetic poles with said mechanical system at rest, an amplifier having an input and output circuit, said input circuit includes a capacitance, said control coil is electrically connected in series with said capacitance for controlling said amplifier in response to signals generated by said mechanical system, a resistance connecting a control electrode of said amplifier to a voltage source, said driving coil is electrically connected in said output circuit, said amplifier including means to prevent feedback oscillations, and said amplifier, said capacitance, and said resistance generating an impulse output current from said amplifier to initiate rotation of said mechanical system from a position of rest.
Claim 2
Dependent Claim
159 words
A drive circuit for rotating a mechanical system, comprising; spaced permanent magnets each having poles of opposite polarity in opposed relationship and forming an air gap therebetween, a coreless driving coil and a coreless control coil mounted in coupled relationship and positioned in said air gap to intersect the magnetic flux passing between said magnetic poles with said mechanical system at rest, an amplifier having an input and output circuit, said input circuit includes a capacitance, said control coil is electrically connected in series with said capacitance for controlling said amplifier in response to signals generated by said mechanical system, a resistance connecting a control electrode of said amplifier to a voltage source, said driving coil is electrically connected in said output circuit, said amplifier including means to prevent feedback oscillations, and said amplifier, said capacitance, and said resistance generating an impulse output current from said amplifier to initiate rotation of said mechanical system from a position of rest.
Claim 3
Dependent Claim
31 words
A circuit as in claim 1 wherein said means for initiating rotation includes a switch whereby said capacitance is charged upon activation of said switch to initiate operation of said amplifier.
Claim 4
Dependent Claim
39 words
A circuit as in claim 2 further comprising means for positioning said control coil and said driving coil in said air gap to intersect the magnetic flux passing between said magnetic poles when said mechanical system is at rest.
Claim 5
Dependent Claim
47 words
A circuit as in claim 3 wherein said permanent magnet comprises two bi-polar magnetic pieces and wherein said means for positioning locate said control coil and said driving coil in an off-center relationship with respect to said magnetic polE pieces when said mechanical system is at rest.
Claim 6
Dependent Claim
37 words
A circuit as in claim 3 wherein said amplifier generates impulses to said driving coil intermittently and wherein said mechanical system is caused to oscillate by an interaction between said means for positioning and said driving impulses.
Claim 7
Dependent Claim
29 words
A circuit as in claim 1 wherein said permanent magnet system is in the form of a rotor and said amplifier provides driving impulses to continuously rotate said rotor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |