US3129369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic motor reversing at limit fo travel by variable transformer means
Assignee: Individual
•
Filing: 1960-07-05
•
Granted: 1964-04-14
•
Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur K Littwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:33
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/0075
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
CONTROL APPARATUS FOR A MACHINE HAVING A MEMBER ALTERNATELY MOVABLE IN OPPOSITE DIRECTIONS THROUGH A PREDETERMINED MAXIMUM RANGE, COMPRISING ELECTRICALLY CONTROLLED REVERSIBLE MEANS FOR DRIVING THE MOVABLE MEMBER IN EACH OF OPPOSITE DIRECTIONS, MAIN TRANSFORMER MEANS CORRESPONDING TO EACH DIRECTION OF MOVEMENT OF THE MOVABLE MEMBER, AN ARMATURE IN EACH MAIN TRANSFORMER MEANS AND CONTINUOUSLY ACTUATED BY THE MOVABLE MEMBER IN THE CORRESPONDING DIRECTION OF MOVEMENT THEREOF AND OPERATIVE FOR CONTROLLING VOLTAGE IN THE CORRESPONDING TRANSFORMER CONTINUOUSLY THROUGHOUT THE RANGE OF MOVEMENT OF THE MOVABLE MEMBER, IN ACCORDANCE WITH THE POSITION OF THE MOVABLE MEMBER IN ITS RANGE OF MOVE-
References Cited (Backward Citations)
US2486151A
Cited
US2767363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |