US3241023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed control
Assignee: Fifth Dimension Inc
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Filing: 1962-03-16
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Granted: 1966-03-15
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Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 James A Eby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
H; H02; H02P; H02P23/00; H02P23/18; H02P23/186; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/906; Y10S388/907; Y10S388/915
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
IN A SYNCHRONIZATION SYSTEM FOR AN ELECTRIC MOTOR HAVING A ROTARY ELEMENT, A SOURCE OF PERIODIC SYNCHRONIZING WAVES OF SAWTOOTH FORM, A SWITCH ACTUABLE TO CLOSED POSITION FOR A TIME SMALL WITH RESPECT TO THE PERIOD OF SAID WAVES IN RESPONSE TO EACH ROTATION OF SAID ROTARY ELEMENT, MEANS RESPONSIVE TO EACH CLOSURE OF SAID SWITCH FOR SAMPLING ONE OF SAID WAVES, THEREBY DERIVING A SAMPLED PULSE HAVING AN AMPLITUDE REPRESENTATIVE OF RELATIVE PHASE OF SYNCHRONIZING WAVES AND MOTOR ROTATION, MEANS FOR LENGTHENING EACH OF SAID SAMPLED PULSES TO AT LEAST APPROXIMATELY THE PERIOD OF SAID WAVES AND A SPEED CONTROL CIRCUIT FOR SAID MOTOR RESPONSIVE TO THE LENGTHENED PULSES.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |