Diver's flashlight
US4114187A · kind A · utility
75Cited by
8References
6Claims
0Family size
Inventor
Key dates
| Filing date | Nov 5, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Nov 5, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V23/0414
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A diver's flashlight having a unitary case with a closed transparent end for light transmission, the other end being sealed by a threaded plug which also serves as a switch. A halogen bulb is mounted in a reflector immediately inside the transparent end and a rechargable battery is held normally out of contact with the bulb by a spring. Tightening the threaded plug overcomes the spring and completes the circuit when the plug is fully seated in sealed position. The plug, and a cap fitted over the transparent end, are of luminous material for night use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.