Patent US3217156A successfully refreshed from Google Patents.
US3217156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency lighting system
Assignee: Individual
•
Filing: 1963-02-11
•
Granted: 1965-11-09
•
Expires: 1983-02-11
Abstract
No abstract record available.
Inventors
- 👤 George W Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:37
CPC Classifications
F; F21; F21S; F21S9/00; F21S9/02; F21S9/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
AN EMERGENCY LIGHTING SYSTEM FOR USE ON FAILURE OF A SOURCE OF ELECTRIC ENERG FOR A USUAL LIFTING SYSTEM COMPRISING A FLASHLIGHT INCLUDING A RECHARGEABLE BATTERY AND A COMBINATION FLASHLIGHT SUPPORTING, CHARGING AND ACTUATING STRUCTURE OPERABLY ASSOCIATED WITH THE FLASHLIGHT FOR SUPPORTING THE FLASHLIGHT IN A DESIRED LOCATION, CHARGING THE RECHARGEABLE FLASHLIGHT BATTERY AND ACTUATING THE FLASHLIGHT ON FAILURE OF THE SOURCE OF ELECTRIC ENERGY FOR THE USUAL LIGHTING SYSTEM, INCLUDING AN OUTER CONDUCTIVE CASE HAVING A FLANGED, WEDGE-SHAPED RECESS IN ONE SURFACE THEREOF, THREE INSULATED RESILIENTLY MOUNTED CONTACT MEMBERS SECURED TO THE CASE, AT LEAST ONE OF WHICH IS POSITIONED WITHIN THE WEDGE-SHAPED RECESS AND AT LEAST ONE OF WHICH IS POSITIONED ADJACENT THE WEDGE-SHAPED RECESS, A TRANSFORMED INCLUDING PRIMARY AND SECONDARY WINDINGS, ELECTRIC CONDUCTORS CONNECTING THE PRIMARY WINDING OF THE TRANSFORMER TO A SOURCE OF ELECTRIC ENERGY, A SIGNAL LIMIT-
Claim 2
Dependent Claim
142 words
AN EMERGENCY LIGHTING SYSTEM FOR USE ON FAILURE OF A SOURCE OF ELECTRIC ENERG FOR A USUAL LIFTING SYSTEM COMPRISING A FLASHLIGHT INCLUDING A RECHARGEABLE BATTERY AND A COMBINATION FLASHLIGHT SUPPORTING, CHARGING AND ACTUATING STRUCTURE OPERABLY ASSOCIATED WITH THE FLASHLIGHT FOR SUPPORTING THE FLASHLIGHT IN A DESIRED LOCATION, CHARGING THE RECHARGEABLE FLASHLIGHT BATTERY AND ACTUATING THE FLASHLIGHT ON FAILURE OF THE SOURCE OF ELECTRIC ENERGY FOR THE USUAL LIGHTING SYSTEM, INCLUDING AN OUTER CONDUCTIVE CASE HAVING A FLANGED, WEDGE-SHAPED RECESS IN ONE SURFACE THEREOF, THREE INSULATED RESILIENTLY MOUNTED CONTACT MEMBERS SECURED TO THE CASE, AT LEAST ONE OF WHICH IS POSITIONED WITHIN THE WEDGE-SHAPED RECESS AND AT LEAST ONE OF WHICH IS POSITIONED ADJACENT THE WEDGE-SHAPED RECESS, A TRANSFORMED INCLUDING PRIMARY AND SECONDARY WINDINGS, ELECTRIC CONDUCTORS CONNECTING THE PRIMARY WINDING OF THE TRANSFORMER TO A SOURCE OF ELECTRIC ENERGY, A SIGNAL LIMIT-
References Cited (Backward Citations)
US1922079A
Cited
US2293284A
Cited
CH229736A
Cited
US2389762A
Cited
US2410527A
Cited
CH245216A
Cited
US2668228A
Cited
US2863038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |