Patent US3224291A successfully refreshed from Google Patents.
US3224291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control
Assignee: Individual
•
Filing: 1962-03-23
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Granted: 1965-12-21
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Expires: 1982-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harold L Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:41
CPC Classifications
B; B63; B63H; B63H21/00; B63H21/21; B63H21/213; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
AN ELECTRICAL CONTROL FOR A DEVICE OPERABLE INTO FIRST, SECOND, AND NEUTRAL POSITIONS COMPRISING, IN COMBINATION, SOLENOID PLUNGER MEANS ADAPTED TO BE CONNECTED TO SAID DEVICE; FORWARD, NEUTRAL, AND REVERSE SOLENOID MEANS FOR SAID PLUNGER MEANS ADAPTED WHEN ENERGIZED TO SELECTIVELY ATTRACT PLUNGER MEANS TO A MAGNETICALLY CENTERED POSITION THEREIN AND SHIFT SAID DEVICE INTO SAID FIRST, SECOND, AND NEUTRAL POSITIONS; CONTROL MEANS FOR SELECTIVELY ENERGIZING SAID FORWARD, REVERSE, AND NEUTRAL SOLENOID MEANS; AND SWITCH MEANS CONTROLLED BY SAID PLUNGER MEANS FOR OPENING THE ENERGIZING CIRCUIT TO EACH SOLENOID MEANS SLIGHTLY BEFORE SAID PLUNGER MEANS HAS BEEN STOPPED IN SAID MAGNETICALLY CENTERED POSITION; SAID PLUNGER MEANS BEING BROUGHT TO REST IN SAID MAGNETICALLY CENTERED POSITION BY THE MAGNETIC FIELD OF SAID SOLENOID MEANS GENERATED BY THE ELECTROMOTIVE FORCE INDUCED THEREIN DUE TO SELF-INDUCTANCE AFTER OPENING OF SAID ENERGIZING CIRCUIT, WHEREBY SAID SOLENOID MEANS ARE NOT ENERGIZED AND DO NOT DRAW CURRENT WHEN SAID DEVICE IS IN SAID FIRST, SECOND, AND NEUTRAL POSITIONS,
Claim 2
Dependent Claim
162 words
AN ELECTRICAL CONTROL FOR A DEVICE OPERABLE INTO FIRST, SECOND, AND NEUTRAL POSITIONS COMPRISING, IN COMBINATION, SOLENOID PLUNGER MEANS ADAPTED TO BE CONNECTED TO SAID DEVICE; FORWARD, NEUTRAL, AND REVERSE SOLENOID MEANS FOR SAID PLUNGER MEANS ADAPTED WHEN ENERGIZED TO SELECTIVELY ATTRACT PLUNGER MEANS TO A MAGNETICALLY CENTERED POSITION THEREIN AND SHIFT SAID DEVICE INTO SAID FIRST, SECOND, AND NEUTRAL POSITIONS; CONTROL MEANS FOR SELECTIVELY ENERGIZING SAID FORWARD, REVERSE, AND NEUTRAL SOLENOID MEANS; AND SWITCH MEANS CONTROLLED BY SAID PLUNGER MEANS FOR OPENING THE ENERGIZING CIRCUIT TO EACH SOLENOID MEANS SLIGHTLY BEFORE SAID PLUNGER MEANS HAS BEEN STOPPED IN SAID MAGNETICALLY CENTERED POSITION; SAID PLUNGER MEANS BEING BROUGHT TO REST IN SAID MAGNETICALLY CENTERED POSITION BY THE MAGNETIC FIELD OF SAID SOLENOID MEANS GENERATED BY THE ELECTROMOTIVE FORCE INDUCED THEREIN DUE TO SELF-INDUCTANCE AFTER OPENING OF SAID ENERGIZING CIRCUIT, WHEREBY SAID SOLENOID MEANS ARE NOT ENERGIZED AND DO NOT DRAW CURRENT WHEN SAID DEVICE IS IN SAID FIRST, SECOND, AND NEUTRAL POSITIONS,
References Cited (Backward Citations)
US2617311A
Cited
US2966970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |