US3165671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase control device
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1960-08-10
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Granted: 1965-01-12
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Expires: 1980-08-10
Abstract
No abstract record available.
Inventors
- 👤 Mintz Martin
- 👤 Villier John De
- 👤 Stanley W Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:30
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/26; H02H3/32; H02H3/34; H02H3/347
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A POLYPHASE CONTROL SYSSTEM, AN APPARATUS COMPRISING: A SINGLE MAGNETIC CIRCUIT; A PLURALITY OF SEPARATE CONDUCTORS COUPLED TO SAID MAGNETIC CIRCUIT AND CONNECTED TO DIFFERENT PHASES OF A POLYPHASE ALTERNATING CURRENT OF A SPECIFIED FUNDAMENTAL FREQUENCY, THE PHASES OF WHICH ARE RELATIVELY ELECTRICALLY DISPLACED; THE ALTERNATING CURRENT IN SAID PLURALITY OF SEPARATE CONDUCTORS ESTABLISHING A RESULTANT FLUX WITHIN SAID MAGNETIC CIRCUIT OF ONE PHASE ANGLE AND MAGNITUDE DURING THE ONE SET OF POLYPHASE CURRENT CONDITIONS AND A DIFFERENT PHASE ANGLE AND MAGNITUDE RESULTANT FLUX DURING UNBALANCED POLYPHASE CURRENT CONDITIONS RELATIVE TO SAID ONE SET OF POLYPHASE CURRENT CONDITIONS; MEANS RESPONSIVE TO AN OVERLOAD IN ONE OF SAID PLURALITY OF SEPARATE CONDUCTORS FOR INTERRUPTING CURRENT FLOW THERETHROUGH, THEREBY INDUCING AN UNBALANCED POLYPHASE CURRENT CONDITION; AND DETECTING MEANS FOR SAID MAGNETIC
Claim 2
Dependent Claim
130 words
IN A POLYPHASE CONTROL SYSSTEM, AN APPARATUS COMPRISING: A SINGLE MAGNETIC CIRCUIT; A PLURALITY OF SEPARATE CONDUCTORS COUPLED TO SAID MAGNETIC CIRCUIT AND CONNECTED TO DIFFERENT PHASES OF A POLYPHASE ALTERNATING CURRENT OF A SPECIFIED FUNDAMENTAL FREQUENCY, THE PHASES OF WHICH ARE RELATIVELY ELECTRICALLY DISPLACED; THE ALTERNATING CURRENT IN SAID PLURALITY OF SEPARATE CONDUCTORS ESTABLISHING A RESULTANT FLUX WITHIN SAID MAGNETIC CIRCUIT OF ONE PHASE ANGLE AND MAGNITUDE DURING THE ONE SET OF POLYPHASE CURRENT CONDITIONS AND A DIFFERENT PHASE ANGLE AND MAGNITUDE RESULTANT FLUX DURING UNBALANCED POLYPHASE CURRENT CONDITIONS RELATIVE TO SAID ONE SET OF POLYPHASE CURRENT CONDITIONS; MEANS RESPONSIVE TO AN OVERLOAD IN ONE OF SAID PLURALITY OF SEPARATE CONDUCTORS FOR INTERRUPTING CURRENT FLOW THERETHROUGH, THEREBY INDUCING AN UNBALANCED POLYPHASE CURRENT CONDITION; AND DETECTING MEANS FOR SAID MAGNETIC
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |