US3260930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic field detecting device
Assignee: Tokyo Keiki Inc
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Filing: 1962-12-26
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Granted: 1966-07-12
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Kawada Shin-Ichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:19
CPC Classifications
H; H03; H03D; H03D1/00; G; G01; G01R; G01R19/00; G01R19/18; G01R19/20; G01R33/00; G01R33/02; G01R33/04; G01R33/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A MAGNETIC FIELD DETECTING DEVICE COMPRISING: A TOROIDAL COIL ASSEMBLY HAVING A SATURABLE RING CORE AND A TWO-COIL WINDING, ONE OF SAID COILS HAVING AN IMPEDANCE CONNECTED IN PARALLEL THEREWITH, A FIRST OF SAID TWO COILS BEING WOUND UNIFORMLY ON ONE-HALF OF SAID SATURABLE RING CORE, A SECOND OF SAID TWO COILS BEING WOUND UNIFORMLY ON THE OTHER HALF OF SAID SATURABLE RING CORE, A BRIDGE CIRCUIT CONSISTING OF SAID TWO COILS AND TWO OTHER IMPEDANCES, AN ALTERNATING CURRENT SOURCE WHICH IS CONNECTED TO ONE PAIR OF THE DIAGONAL POINTS OF SAID BRIDGE CIRCUIT, SAID ONE PAIR OF THE DIAGONAL POINTS BEING FORMED BY THE CONNECTION POING OF SAID TWO COILS AND THE CONNECTION POINT OF SAID TWO IMPEDANCES, AND A CONVERTER CIRCUIT INCLUDING A DEAD BAND CIRCUIT WHICH BECOMES CONDUCTIVE ONLY WHEN A PLUS OR MINUS INPUT VOLTAGE BEYOND A PREDETERMINED VALUE IS SUPPLIED TO SAID CONVERTER CIRCUIT, THE INPUT TERMINALS OF SAID CONVERTER CIRCUIT BEING CONNECTED TO THE OTHER PAIR OF THE DIAGONAL POINTS OF SAID BRIDGE CIRCUIT AN A LOAD BEING CONNECTED IN SERIES TO THE OUTPUT SIDE OF SAID CONVERTER CIRCUIT.
Claim 2
Dependent Claim
185 words
A MAGNETIC FIELD DETECTING DEVICE COMPRISING: A TOROIDAL COIL ASSEMBLY HAVING A SATURABLE RING CORE AND A TWO-COIL WINDING, ONE OF SAID COILS HAVING AN IMPEDANCE CONNECTED IN PARALLEL THEREWITH, A FIRST OF SAID TWO COILS BEING WOUND UNIFORMLY ON ONE-HALF OF SAID SATURABLE RING CORE, A SECOND OF SAID TWO COILS BEING WOUND UNIFORMLY ON THE OTHER HALF OF SAID SATURABLE RING CORE, A BRIDGE CIRCUIT CONSISTING OF SAID TWO COILS AND TWO OTHER IMPEDANCES, AN ALTERNATING CURRENT SOURCE WHICH IS CONNECTED TO ONE PAIR OF THE DIAGONAL POINTS OF SAID BRIDGE CIRCUIT, SAID ONE PAIR OF THE DIAGONAL POINTS BEING FORMED BY THE CONNECTION POING OF SAID TWO COILS AND THE CONNECTION POINT OF SAID TWO IMPEDANCES, AND A CONVERTER CIRCUIT INCLUDING A DEAD BAND CIRCUIT WHICH BECOMES CONDUCTIVE ONLY WHEN A PLUS OR MINUS INPUT VOLTAGE BEYOND A PREDETERMINED VALUE IS SUPPLIED TO SAID CONVERTER CIRCUIT, THE INPUT TERMINALS OF SAID CONVERTER CIRCUIT BEING CONNECTED TO THE OTHER PAIR OF THE DIAGONAL POINTS OF SAID BRIDGE CIRCUIT AN A LOAD BEING CONNECTED IN SERIES TO THE OUTPUT SIDE OF SAID CONVERTER CIRCUIT.
References Cited (Backward Citations)
US2252059A
Cited
US2390051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |