US3242382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical safety circuit
Assignee: Individual
•
Filing: 1965-06-25
•
Granted: 1966-03-22
•
Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Sr Charles J Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:29
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/16; H02H3/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
AN IMPROVED ELECTRICAL SAFETY CIRCUIT COMPRISING, IN COMBINATION, A TRANSFORMER HAVING A PRIMARY WINDING ARRANGED TO BE CONNECTED TO A SOURCE OF ELECTRICAL POWER AND A SECONDARY WINDING ARRANGED TO BE CONNECTED BY MEANS OF LINE CONDUCTORS TO A LOAD, NORMALLY CLOSED SWITCHING MEANS FOR DISCONNECTING SAID LOAD FROM SAID SOURCE OF POWER, NORMALLY INOPERATIVE FIRST CIRCUIT MEANS CONNECTED TO SAID TRANSFORMER SECONDARY WINDING FOR ACTUATING SAID SWITCHING MEANS AT A PREDETERMINED AMPERAGE, SECOND CIRCUIT MEANS CONNECTED BETWEEN SAID FIRST CIRCUIT MEANS AND GROUND FOR OPERATIVELY CONDITIONING SAID FIRST CIRCUIT MEANS, SAID SECOND CIRCUIT MEANS BEING NORMALLY NON-RESPONSIVE TO A FAULT PRODUCED BY THE GROUNDING OF ONE OF SAID LINE CONDUCTORS BY THE HUMAN BODY, SAID SECOND CIRCUIT MEANS BEING ARRANGED TO RESPOND TO THE PRESENCE OF A LOW RESISTANCE GROUND FAULT ON ONE OF SAID LINE CONDUCTORS TO OPERATIVELY CONDITION SAID FIRST CIRCUIT MEANS AT AN AMPERAGE WHICH IS SUBSTANTIALLY BELOW SAID PREDETERMINED AMPERAGE IN SAID FIRST CIRCUIT MEANS AND POSITIVELY NON-INJURIOUS TO THE HUMAN BODY WHEREBY SAID OPERATIVELY CONDITIONED FIRST CIRCUIT MEANS ACTUATES SAID SWITCHING MEANS TO DISCONNECT SAID LOAD FROM SAID SOURCE OF POWER.
Claim 2
Dependent Claim
187 words
AN IMPROVED ELECTRICAL SAFETY CIRCUIT COMPRISING, IN COMBINATION, A TRANSFORMER HAVING A PRIMARY WINDING ARRANGED TO BE CONNECTED TO A SOURCE OF ELECTRICAL POWER AND A SECONDARY WINDING ARRANGED TO BE CONNECTED BY MEANS OF LINE CONDUCTORS TO A LOAD, NORMALLY CLOSED SWITCHING MEANS FOR DISCONNECTING SAID LOAD FROM SAID SOURCE OF POWER, NORMALLY INOPERATIVE FIRST CIRCUIT MEANS CONNECTED TO SAID TRANSFORMER SECONDARY WINDING FOR ACTUATING SAID SWITCHING MEANS AT A PREDETERMINED AMPERAGE, SECOND CIRCUIT MEANS CONNECTED BETWEEN SAID FIRST CIRCUIT MEANS AND GROUND FOR OPERATIVELY CONDITIONING SAID FIRST CIRCUIT MEANS, SAID SECOND CIRCUIT MEANS BEING NORMALLY NON-RESPONSIVE TO A FAULT PRODUCED BY THE GROUNDING OF ONE OF SAID LINE CONDUCTORS BY THE HUMAN BODY, SAID SECOND CIRCUIT MEANS BEING ARRANGED TO RESPOND TO THE PRESENCE OF A LOW RESISTANCE GROUND FAULT ON ONE OF SAID LINE CONDUCTORS TO OPERATIVELY CONDITION SAID FIRST CIRCUIT MEANS AT AN AMPERAGE WHICH IS SUBSTANTIALLY BELOW SAID PREDETERMINED AMPERAGE IN SAID FIRST CIRCUIT MEANS AND POSITIVELY NON-INJURIOUS TO THE HUMAN BODY WHEREBY SAID OPERATIVELY CONDITIONED FIRST CIRCUIT MEANS ACTUATES SAID SWITCHING MEANS TO DISCONNECT SAID LOAD FROM SAID SOURCE OF POWER.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |