Patent US3413486A successfully refreshed from Google Patents.
US3413486A
Expired / Lapsed
US
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Electrical interlock system
Assignee: Berkey Photo Inc
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Filing: 1965-10-04
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Granted: 1968-11-26
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert A Flieder
- 👤 Maksymilian A Michalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:25
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/34; H02; H02H; H02H11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN INTERLOCK SYSTEM FOR SWITCHING A HIGH VOLTAGE POWER SUPPLY TO A LOAD, THE SYSTEM COMPRISING SOURCES OF HIGH AND LOW VOLTAGES, THE LOAD ADAPTED TO BE SUPPLIED BY THE HIGH VOLTAGE, AT LEAST ONE DISCONNECT FITTING, THE HIGH VOLTAGE CURRENT PASSING THROUGH THE DISCONNECT FITTING TO THE LOAD, AN INTERLOCK CIRCUIT PARALLELING THE HIGH VOLTAGE CIRCUIT AT LEAST THROUGH SAID DISCONNECT FITTING, FIRST SWITCHING MEANS INCLUDING CONTROL MEANS ACTUATED BY THE LOW VOLTAGE COMPLETED THROUGH THE INTERLOCK CIRCUIT, SECOND SWITCHING MEANS INCLUDING CONTROL MEANS ACTUATED
Claim 2
Dependent Claim
86 words
AN INTERLOCK SYSTEM FOR SWITCHING A HIGH VOLTAGE POWER SUPPLY TO A LOAD, THE SYSTEM COMPRISING SOURCES OF HIGH AND LOW VOLTAGES, THE LOAD ADAPTED TO BE SUPPLIED BY THE HIGH VOLTAGE, AT LEAST ONE DISCONNECT FITTING, THE HIGH VOLTAGE CURRENT PASSING THROUGH THE DISCONNECT FITTING TO THE LOAD, AN INTERLOCK CIRCUIT PARALLELING THE HIGH VOLTAGE CIRCUIT AT LEAST THROUGH SAID DISCONNECT FITTING, FIRST SWITCHING MEANS INCLUDING CONTROL MEANS ACTUATED BY THE LOW VOLTAGE COMPLETED THROUGH THE INTERLOCK CIRCUIT, SECOND SWITCHING MEANS INCLUDING CONTROL MEANS ACTUATED
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |