US3217221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step motor drive circuit
Assignee: Bendix Corp
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Filing: 1962-06-28
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Granted: 1965-11-09
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Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Henry R Heggen
- 👤 Irvin M Starr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:31
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/22; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A VARIABLE-SPEED MOTOR DRIVE CIRCUIT COMPRISING: A PULSE-OPERATED STEP DRIVE MOTOR; A VOLTAGE-CONTROLLED, VARIABLE-FREQUENCY PULSE GENERATOR CONNECTED TO SAID MOTOR; AN ELECTRICAL NETWORK HAVING A PAIR OF INPUT AND A PAIR OF OUTPUT TERMINALS AND AN OUTPUT VOLTAGE WHICH INCREASES WITH TIME OVER A PERIOD OF SEVERAL SECONDS UPON THE APPLICATION OF A UNIDIRECTIONAL VOLTAGE TO THE INPUT TERMINALS THEREOF; SAID NETWORK OUTPUT TERMINALS CONNECTED TO THE FREQUENCY-DETERMINING INPUT OF SAID PULSE GENERATOR; AND SWITCH MEANS FOR APPLYING A UNIDIRECTIONAL VOLTAGE TO SAID ELECTRICAL NETWORK INPUT TERMINAL WHEREUPON SAID STEP DRIVE MOTOR IS OPERATED UPON THE OPERATION OF SAID SWITCH MEANS AT AN INCREASING RATE DETERMINED BY THE TIME-VOLTAGE CHARACTERISTIC OF SAID NETWORK.
Claim 2
Dependent Claim
113 words
A VARIABLE-SPEED MOTOR DRIVE CIRCUIT COMPRISING: A PULSE-OPERATED STEP DRIVE MOTOR; A VOLTAGE-CONTROLLED, VARIABLE-FREQUENCY PULSE GENERATOR CONNECTED TO SAID MOTOR; AN ELECTRICAL NETWORK HAVING A PAIR OF INPUT AND A PAIR OF OUTPUT TERMINALS AND AN OUTPUT VOLTAGE WHICH INCREASES WITH TIME OVER A PERIOD OF SEVERAL SECONDS UPON THE APPLICATION OF A UNIDIRECTIONAL VOLTAGE TO THE INPUT TERMINALS THEREOF; SAID NETWORK OUTPUT TERMINALS CONNECTED TO THE FREQUENCY-DETERMINING INPUT OF SAID PULSE GENERATOR; AND SWITCH MEANS FOR APPLYING A UNIDIRECTIONAL VOLTAGE TO SAID ELECTRICAL NETWORK INPUT TERMINAL WHEREUPON SAID STEP DRIVE MOTOR IS OPERATED UPON THE OPERATION OF SAID SWITCH MEANS AT AN INCREASING RATE DETERMINED BY THE TIME-VOLTAGE CHARACTERISTIC OF SAID NETWORK.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |