Patent US3418487A successfully refreshed from Google Patents.
US3418487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency power supply system
Assignee: U C LITE Mfg CO
•
Filing: 1966-05-25
•
Granted: 1968-12-24
•
Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 John D Livingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
H; H02; H02J; H02J9/00; H02J9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
AN EMERGENCY POWER SUPPLY SYSTEM FOR CONNECTION TO AN A.C. INPUT CIRCUIT, AN OUTPUT LOAD AND BATTERY MEANS, COMPRISING A.C. INPUT MEANS FOR CONNECTION TO AN A.C. INPUT CIRCUIT, A SOLID STATE CONTROLLED RECTIFIER DEVICE CONNECTED ON ONE SIDE TO SAID A.C. INPUT MEANS, BATTERY CON NECTING MEANS CONNECTED TO THE OTHER SIDE OF SAID RECTIFIER DEVICE AND ADAPTED FOR CONNECTION TO ONE TERMINAL OF SAID BATTERY MEANS, MEANS FOR CONNECTING THE OTHER TERMINAL OF SAID BATTERY MEANS AND ONE TERMINAL OF AN OUTPUT LOAD, MEANS CONNECTED TO SAID A.C. INPUT MEANS AND ADAPTED TO BE CONNECTED TO SAID OUTPUT LOAD, THERE THEREBY BEING A SERIES CIRCUIT COMPRISING SAID SOLID STATE CONTROLLED RECTIFIER DEVICE, SAID BATTERY MEANS, SAID OUTPUT LOAD AND SAID A.C. INPUT MEANS, AND BIASING MEANS NORMALLY BIASING SAID SOLID STATE CONTROLLED RECTIFIER MEANS OFF WHEREBY SAID SERIES CIRCUIT IS NORMALLY OPEN, BUT BIASING SAID SOLID STATE CONTROLLED RECTIFIER MEANS UPON FAILURE OF SUPPLY OF ALTERNATING CURRENT TO SAID A.C. INPUT MEANS TO COMPLETE SAID SERIES CIRCUIT AND ENERGIZE AND OUTPUT LOAD FROM SAID BATTERY MEANS, AND BIASING MEANS FURTHER INCLUDING CAPACITOR MEANS AND UNILATERALLY CONDUCTING MEANS INTERCONNECTED WITH ONE ANOTHER AND CONNECTED TO SAID A.C. INPUT MEANS AND FURTHER CONNECTED TO SAID SOLID STATE CONTROLLED RECTIFIER DEVICE.
Claim 2
Dependent Claim
210 words
AN EMERGENCY POWER SUPPLY SYSTEM FOR CONNECTION TO AN A.C. INPUT CIRCUIT, AN OUTPUT LOAD AND BATTERY MEANS, COMPRISING A.C. INPUT MEANS FOR CONNECTION TO AN A.C. INPUT CIRCUIT, A SOLID STATE CONTROLLED RECTIFIER DEVICE CONNECTED ON ONE SIDE TO SAID A.C. INPUT MEANS, BATTERY CON NECTING MEANS CONNECTED TO THE OTHER SIDE OF SAID RECTIFIER DEVICE AND ADAPTED FOR CONNECTION TO ONE TERMINAL OF SAID BATTERY MEANS, MEANS FOR CONNECTING THE OTHER TERMINAL OF SAID BATTERY MEANS AND ONE TERMINAL OF AN OUTPUT LOAD, MEANS CONNECTED TO SAID A.C. INPUT MEANS AND ADAPTED TO BE CONNECTED TO SAID OUTPUT LOAD, THERE THEREBY BEING A SERIES CIRCUIT COMPRISING SAID SOLID STATE CONTROLLED RECTIFIER DEVICE, SAID BATTERY MEANS, SAID OUTPUT LOAD AND SAID A.C. INPUT MEANS, AND BIASING MEANS NORMALLY BIASING SAID SOLID STATE CONTROLLED RECTIFIER MEANS OFF WHEREBY SAID SERIES CIRCUIT IS NORMALLY OPEN, BUT BIASING SAID SOLID STATE CONTROLLED RECTIFIER MEANS UPON FAILURE OF SUPPLY OF ALTERNATING CURRENT TO SAID A.C. INPUT MEANS TO COMPLETE SAID SERIES CIRCUIT AND ENERGIZE AND OUTPUT LOAD FROM SAID BATTERY MEANS, AND BIASING MEANS FURTHER INCLUDING CAPACITOR MEANS AND UNILATERALLY CONDUCTING MEANS INTERCONNECTED WITH ONE ANOTHER AND CONNECTED TO SAID A.C. INPUT MEANS AND FURTHER CONNECTED TO SAID SOLID STATE CONTROLLED RECTIFIER DEVICE.
References Cited (Backward Citations)
US3179871A
Cited
US3049623A
Cited
US3159755A
Cited
US3255398A
Cited
US3319074A
Cited
US3308306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |