US3253202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control circuit for threephase load device
Assignee: Cutler Hammer Inc
•
Filing: 1962-02-23
•
Granted: 1966-05-24
•
Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 Ronald K Cotton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:28
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; B66C2700/00; B66C2700/08; B66C2700/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
A SYSTEM FOR CONTROLLING ENERGIZATION OF A THREEPHASE ALTERNATING CURRENT LOAD DEVICE AND HAVING THREE INPUT TERMINALS FOR APPLYING ELECTRICAL POWER THERETO COMPRISING: (A) A THREE-PHASE ALTERNATING CURRENT POWER SUPPLY SOURCE; (B) THREE SUPPLY CONDUCTORS CONNECTED TO SAID SOURCE; (C) MEANS FOR CONNECTING A FIRST ONE OF SAID SUPPLY CONDUCTORS DIRECTLY TO A FIRST ONE OF SAID THREE INPUT TERMINALS; (D) FIRST CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN THE SECOND SUPPLY CONDUCTOR AND THE SECOND INPUT TERMINAL AND SECOND CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN THE THIRD SUPPLY CONDUCTOR AND THE THIRD INPUT TERMINAL, EACH OF SAID CONTROLLED RECTIFIER MEANS COMPRISING AT LEAST TWO SOLID STATE CONTROLLED RECTIFIERS CONNECTED IN REVERSE PARALLEL RELATION TO AFFORD CURRENT FLOW IN OPPOSITE DIRECTIONS THROUGH THE RESPECTIVE CONTROLLED RECTIFIERS BETWEEN THE ASSOCIATED SUPPLY CONDUCTOR AND THE ASSOCIATED INPUT TERMINAL; (E) MEANS FOR CONTROLLING FIRING OF SAID CONTROLLED RECTIFIERS DURING POSITIVE HALF-CYCLES OF THEIR ANODE VOLTAGE TO ENERGIZE THE LOAD DEVICE; (F) THIRD CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN SAID SECOND SUPPLY CONDUCTOR AND SAID THIRS INPUT TERMINAL AND FOURTH CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN SAID THIRD SUPPLY CONDUCTOR AND SAID SECOND INPUT TERMINAL, EACH SAID THIRD AND FOURTH CONTROLLED RECTIFIER MEANS COMPRISING AT LEAST TWO SOLID STATE CONTROLLED
Claim 2
Independent Claim
209 words
A SYSTEM FOR CONTROLLING ENERGIZATION OF A THREEPHASE ALTERNATING CURRENT LOAD DEVICE AND HAVING THREE INPUT TERMINALS FOR APPLYING ELECTRICAL POWER THERETO COMPRISING: (A) A THREE-PHASE ALTERNATING CURRENT POWER SUPPLY SOURCE; (B) THREE SUPPLY CONDUCTORS CONNECTED TO SAID SOURCE; (C) MEANS FOR CONNECTING A FIRST ONE OF SAID SUPPLY CONDUCTORS DIRECTLY TO A FIRST ONE OF SAID THREE INPUT TERMINALS; (D) FIRST CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN THE SECOND SUPPLY CONDUCTOR AND THE SECOND INPUT TERMINAL AND SECOND CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN THE THIRD SUPPLY CONDUCTOR AND THE THIRD INPUT TERMINAL, EACH OF SAID CONTROLLED RECTIFIER MEANS COMPRISING AT LEAST TWO SOLID STATE CONTROLLED RECTIFIERS CONNECTED IN REVERSE PARALLEL RELATION TO AFFORD CURRENT FLOW IN OPPOSITE DIRECTIONS THROUGH THE RESPECTIVE CONTROLLED RECTIFIERS BETWEEN THE ASSOCIATED SUPPLY CONDUCTOR AND THE ASSOCIATED INPUT TERMINAL; (E) MEANS FOR CONTROLLING FIRING OF SAID CONTROLLED RECTIFIERS DURING POSITIVE HALF-CYCLES OF THEIR ANODE VOLTAGE TO ENERGIZE THE LOAD DEVICE; (F) THIRD CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN SAID SECOND SUPPLY CONDUCTOR AND SAID THIRS INPUT TERMINAL AND FOURTH CONTROLLED RECTIFIER MEANS INTERPOSED AND CONNECTED BETWEEN SAID THIRD SUPPLY CONDUCTOR AND SAID SECOND INPUT TERMINAL, EACH SAID THIRD AND FOURTH CONTROLLED RECTIFIER MEANS COMPRISING AT LEAST TWO SOLID STATE CONTROLLED
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |