Patent US3344880A successfully refreshed from Google Patents.
US3344880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage operated automatic speed control system for automobiles
Assignee: Toyota Motor Corp
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Filing: 1964-11-24
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Granted: 1967-10-03
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Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Iwashita Noboru
- 👤 Ohno Kenji
- 👤 Kobayashi Ikuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:57
CPC Classifications
F; F02; F02D; F02D31/00; F02D31/001; F02D31/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
IN AN AUTOMATIC SPEED CONTROL SYSTEM FOR AUTOMOBILES, A SMALL ALTERNATING CURRENT DRIVE SHAFT, MEANS FOR TO BE DRIVEN BY AN AUTOMOBILE DRIVE SHAFT, MEANS FOR RECTIFYING THE OUTPUT OF SAID GENERATOR, VOLTAGE DIVIDER MEANS FOR ADJUSTABLY DERIVING A PORTION OF THE RECTIFIED OUTPUT OF SAID GENERATOR, A PAIR OF ZENER DIODES HAVING THEIR INPUTS CONNECTED TO SAID VOLTAGE DIVIDER MEANS, A PAIR OF TRANSISTOR SWITCHING CIRUITS HAVING THEIR INPUTS CONNECTED RESPECTIVELY TO THE OUTPUTS OF SAID ZENER DIODES, A PAIR OF OUTPUT RELAYS HAVING THEIR ACTUATING WINDINGS CONNECTED RESPECTIVELY TO THE OUTPUTS OF SAID TRANSISTOR SWITCHING CIRCUITS, A SERVO MOTOR CONNECTED TO CONTROL THE AUTOMOBILE THROTTLE VALVE, A CONTROL RELAY HAVING ITS ACTUATING WINDING CONNECTED TO THE CONTROLLED CONTACTS OF SAID OUTPUT RELAYS, SAID CONTROL RELAY HAVING A PLURALITY OF CONTORLLED CONTACTS CONNECTED TO THE INPUT OF SAID SERVO MOTOR, WHEREBY SAID SERVO MOTOR ADJUSTS THE THROTTLE VALVE TO ADJUST THE SPEED OF SAID DRIVE SHAFT IN DESIRED MANNER.
Claim 2
Dependent Claim
160 words
IN AN AUTOMATIC SPEED CONTROL SYSTEM FOR AUTOMOBILES, A SMALL ALTERNATING CURRENT DRIVE SHAFT, MEANS FOR TO BE DRIVEN BY AN AUTOMOBILE DRIVE SHAFT, MEANS FOR RECTIFYING THE OUTPUT OF SAID GENERATOR, VOLTAGE DIVIDER MEANS FOR ADJUSTABLY DERIVING A PORTION OF THE RECTIFIED OUTPUT OF SAID GENERATOR, A PAIR OF ZENER DIODES HAVING THEIR INPUTS CONNECTED TO SAID VOLTAGE DIVIDER MEANS, A PAIR OF TRANSISTOR SWITCHING CIRUITS HAVING THEIR INPUTS CONNECTED RESPECTIVELY TO THE OUTPUTS OF SAID ZENER DIODES, A PAIR OF OUTPUT RELAYS HAVING THEIR ACTUATING WINDINGS CONNECTED RESPECTIVELY TO THE OUTPUTS OF SAID TRANSISTOR SWITCHING CIRCUITS, A SERVO MOTOR CONNECTED TO CONTROL THE AUTOMOBILE THROTTLE VALVE, A CONTROL RELAY HAVING ITS ACTUATING WINDING CONNECTED TO THE CONTROLLED CONTACTS OF SAID OUTPUT RELAYS, SAID CONTROL RELAY HAVING A PLURALITY OF CONTORLLED CONTACTS CONNECTED TO THE INPUT OF SAID SERVO MOTOR, WHEREBY SAID SERVO MOTOR ADJUSTS THE THROTTLE VALVE TO ADJUST THE SPEED OF SAID DRIVE SHAFT IN DESIRED MANNER.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |