US3227255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for power press
Assignee: Danly Machine Specialties Inc
•
Filing: 1962-01-29
•
Granted: 1966-01-04
•
Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Francis E Heiberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:55
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B30B15/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A CONTROL CIRCUIT FOR A PRESS HAVING MEANS INCLUDING A CLUTCH FOR OPERATING THE PRESS, THE SUB-COMBINATION COMPRISING A TRANSISTOR HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT, MEANS INCLUDING A FIRST INPUT TRANSFORMER FOR APPLYING AN A-C. INPUT SIGNAL TO THE INPUT CIRCUIT AN OUTPUT TRANSFORMER HAVING ITS PRIMARY WINDING CONNECTED IN THE OUTPUT CIRCUIT OF THE TRANSISTOR AND ITS SECONDARY WINDING CONTROLLINGLY COUPLED TO THE CLUTCH MEANS SO THAT WHEN AN A-C. SIGNAL IS PRESENT IN SAID SECONDARY WINDING THE CLUTCH IS ENERGIZED FOR OPERATION OF THE PRESS A SECOND INPUT TRANSFORMER HAVING A FULL WAVE RECTIFIER FOR APPLYING AN INPUT SIGNAL TO THE OUTPUT CIRCUIT OF THE TRANSISTOR, ONE OF SAID INPUT TRANSFORMERS BEING CONNECTED TO A SOURCE OF CONDITIONING SIGNAL AND ANOTHER OF SAID
Claim 2
Dependent Claim
129 words
IN A CONTROL CIRCUIT FOR A PRESS HAVING MEANS INCLUDING A CLUTCH FOR OPERATING THE PRESS, THE SUB-COMBINATION COMPRISING A TRANSISTOR HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT, MEANS INCLUDING A FIRST INPUT TRANSFORMER FOR APPLYING AN A-C. INPUT SIGNAL TO THE INPUT CIRCUIT AN OUTPUT TRANSFORMER HAVING ITS PRIMARY WINDING CONNECTED IN THE OUTPUT CIRCUIT OF THE TRANSISTOR AND ITS SECONDARY WINDING CONTROLLINGLY COUPLED TO THE CLUTCH MEANS SO THAT WHEN AN A-C. SIGNAL IS PRESENT IN SAID SECONDARY WINDING THE CLUTCH IS ENERGIZED FOR OPERATION OF THE PRESS A SECOND INPUT TRANSFORMER HAVING A FULL WAVE RECTIFIER FOR APPLYING AN INPUT SIGNAL TO THE OUTPUT CIRCUIT OF THE TRANSISTOR, ONE OF SAID INPUT TRANSFORMERS BEING CONNECTED TO A SOURCE OF CONDITIONING SIGNAL AND ANOTHER OF SAID
References Cited (Backward Citations)
US2225653A
Cited
US2345933A
Cited
US2774452A
Cited
US2788104A
Cited
US3036683A
Cited
US2909259A
Cited
US2972114A
Cited
US3030524A
Cited
US3038089A
Cited
US3068423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |