US3711754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for driving a moving element
Assignee: Individual
•
Filing: 1970-03-26
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Granted: 1973-01-16
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Expires: 1990-03-26
Abstract
Abstract An electric circuit is disclosed for starting an output member in vibratory motion and maintaining the vibrations at a constant amplitude. A coil is electromagnetically coupled to the output member and performs both the driving and pick-up functions. The circuit includes two oppositely polarized transistors cooperating with a coupling capacitor to deliver current pulses of a relatively large pulse width to the coil to start the output member in vibratory motion. The pulse width is progressively decreased until the output member is vibrationally maintained at a constant amplitude and frequency.
Inventors
- 👤 K Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:21
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A circuit for driving a moving element comprising: a movably mounted output element, two transistors of opposite polarities, means serially connecting the collector of one of said transistors to the base of the other transistor, a d-c power source, a biasing resistor connected between the base of said one transistor and said power source, another resistor connected between the emitter of said one transistor and said power source, means capacitively coupling together the emitters of said transistors, a coil electromagnetically coupled to said output element and electrically connected to the emitter of said other transistor effective to both vibrationally drive said output element and pick-up the movement of the vibrating output element, means connecting the collector of said other transistor to said power source, and means electrically connecting said power source, said other resistor, said capacitor and coil in series.
Claim 2
Dependent Claim
140 words
A circuit for driving a moving element comprising: a movably mounted output element, two transistors of opposite polarities, means serially connecting the collector of one of said transistors to the base of the other transistor, a d-c power source, a biasing resistor connected between the base of said one transistor and said power source, another resistor connected between the emitter of said one transistor and said power source, means capacitively coupling together the emitters of said transistors, a coil electromagnetically coupled to said output element and electrically connected to the emitter of said other transistor effective to both vibrationally drive said output element and pick-up the movement of the vibrating output element, means connecting the collector of said other transistor to said power source, and means electrically connecting said power source, said other resistor, said capacitor and coil in series.
References Cited (Backward Citations)
US3306030A
Cited
US3046460A
Cited
US3229225A
Cited
US3365635A
Cited
US3407344A
Cited
US3403312A
Cited
US3597634A
Cited
US3530662A
Cited
US3491531A
Cited
US3553955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |