US3229163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical safety circuit
Assignee: Individual
•
Filing: 1963-03-11
•
Granted: 1966-01-11
•
Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles J Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:03
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/16; H02H3/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN ELECTRICAL SAFETY CIRCUIT COMPRISING, IN COMBINATION, A TRANSFORMER HAVING A PRIMARY WINDING CONNECTED TO A SOURCE OF ELECTRICAL POWER AND A SECONDARY WINDING CONNECTED BY MEANS OF LIVE CONDUCTORS TO A LOAD, NORMALLY CLOSED SWITCHING MEANS FOR INTERRUPTING SAID LIVE CONDUCTORS AND DISCONNECTING SAID LOAD FROM SAID TRANSFORMER SECONDARY WINDING AND CIRCUIT MEANS CONNECTED BETWEEN SAID TRANSFORMER SECONDARY WINDING AND GROUND FOR ACTUATING SAID SWITCHING MEANS UPON THE OCCURRENCE OF A LOW RESISTANCE GROUND FAULT IN ONE OF SAID LIVE CONDUCTORS TO INTERRUPT SAID LIVE CONDUCTORS AND DISCONNECT SAID LOAD, SAID CIRCUIT MEANS BEING NON-RESPONSIVE TO A FAULT PRODUCED BY THE GROUNDING OF ONE OF SAID LIVE CONDUCTORS BY THE HUMAN BODY TO PREVENT ACTUATION OF SAID SWITCHING MEANS.
Claim 2
Dependent Claim
120 words
AN ELECTRICAL SAFETY CIRCUIT COMPRISING, IN COMBINATION, A TRANSFORMER HAVING A PRIMARY WINDING CONNECTED TO A SOURCE OF ELECTRICAL POWER AND A SECONDARY WINDING CONNECTED BY MEANS OF LIVE CONDUCTORS TO A LOAD, NORMALLY CLOSED SWITCHING MEANS FOR INTERRUPTING SAID LIVE CONDUCTORS AND DISCONNECTING SAID LOAD FROM SAID TRANSFORMER SECONDARY WINDING AND CIRCUIT MEANS CONNECTED BETWEEN SAID TRANSFORMER SECONDARY WINDING AND GROUND FOR ACTUATING SAID SWITCHING MEANS UPON THE OCCURRENCE OF A LOW RESISTANCE GROUND FAULT IN ONE OF SAID LIVE CONDUCTORS TO INTERRUPT SAID LIVE CONDUCTORS AND DISCONNECT SAID LOAD, SAID CIRCUIT MEANS BEING NON-RESPONSIVE TO A FAULT PRODUCED BY THE GROUNDING OF ONE OF SAID LIVE CONDUCTORS BY THE HUMAN BODY TO PREVENT ACTUATION OF SAID SWITCHING MEANS.
References Cited (Backward Citations)
US2079636A
Cited
US2844765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |