US3299347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting device for gradually applying current to a load by means of parallel branch circuits
Assignee: Toshiba Corp
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Filing: 1964-03-27
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Granted: 1967-01-17
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Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Torii Yasunosuke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:50
CPC Classifications
B; B60; B60L; B60L9/00; B60L9/16; B60L9/24; B60L9/26; Y; Y10; Y10S; Y10S323/00; Y10S323/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A STARTING DEVICE FOR GRADUALLY APPLYING CURRENT TO A LOAD COMPRISING A MAIN RESISTOR, A PLURALITY OF BRANCH CIRCUITS, EACH SAID BRANCH CIRCUITS INCLUDING A PLURALITY OF RESISTORS CONNECTED IN SERIES, AND A FIRST CONTROLLED RECTIFIER ELEMENT, WHICH WHEN ENABLED WILL PASS CURRENT ACROSS THE RESPECTIVE BRANCHES, SAID MAIN RESISTOR AND EACH OF THE RESISTORS IN SAID BRANCH CIRCUITS HAVING SUBSTANTIALLY THE SAME RESISTANCE VALUE; A SHUNT CIRCUIT ACROSS EACH OF SAID RESISTORS LESS ONE IN EACH OF SAID BRANCHES, INCLUDING A SECOND CONTROLLED RECTIFIER ELEMENT IN EACH OF SAID SHUNT CIRCUITS; AND, MEANS TO SEQUENTIALLY ENABLE SAID FIRST CONTROLLED RECTIFIER ELEMENTS IN THE RESPECTIVE BRANCH CIRCUITS CONCURRENTLY WITH THE SIMULTANEOUSLY ENABLING OF A SELECTED ONE OF SAID SECOND CONTROLLED RECTIFIER ELEMENTS TO PROGRESSIVELY SHORT CIRCUIT THE SERIES RESISTORS IN EACH BRANCH ACROSS WHICH SAID SECOND CONTROLLED RECTIFIER ELEMENTS ARE SHUNTED AS CURRENT PASSES ACROSS SUCCEEDING BRANCHES.
Claim 2
Dependent Claim
147 words
A STARTING DEVICE FOR GRADUALLY APPLYING CURRENT TO A LOAD COMPRISING A MAIN RESISTOR, A PLURALITY OF BRANCH CIRCUITS, EACH SAID BRANCH CIRCUITS INCLUDING A PLURALITY OF RESISTORS CONNECTED IN SERIES, AND A FIRST CONTROLLED RECTIFIER ELEMENT, WHICH WHEN ENABLED WILL PASS CURRENT ACROSS THE RESPECTIVE BRANCHES, SAID MAIN RESISTOR AND EACH OF THE RESISTORS IN SAID BRANCH CIRCUITS HAVING SUBSTANTIALLY THE SAME RESISTANCE VALUE; A SHUNT CIRCUIT ACROSS EACH OF SAID RESISTORS LESS ONE IN EACH OF SAID BRANCHES, INCLUDING A SECOND CONTROLLED RECTIFIER ELEMENT IN EACH OF SAID SHUNT CIRCUITS; AND, MEANS TO SEQUENTIALLY ENABLE SAID FIRST CONTROLLED RECTIFIER ELEMENTS IN THE RESPECTIVE BRANCH CIRCUITS CONCURRENTLY WITH THE SIMULTANEOUSLY ENABLING OF A SELECTED ONE OF SAID SECOND CONTROLLED RECTIFIER ELEMENTS TO PROGRESSIVELY SHORT CIRCUIT THE SERIES RESISTORS IN EACH BRANCH ACROSS WHICH SAID SECOND CONTROLLED RECTIFIER ELEMENTS ARE SHUNTED AS CURRENT PASSES ACROSS SUCCEEDING BRANCHES.
References Cited (Backward Citations)
GB913978A
Cited
US3100268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |