Flashlight and extension therefore
US5197796A · kind A · utility
Inventor
Key dates
| Filing date | Jul 2, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V15/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A conventional flashlight is modified to provide greater brightness by providing an extension tube between the base cap and the body of the flashlight. The extension holds one or more additional batteries so that a higher voltage and brighter bulb can be substituted for the original flashlight bulb. In a preferred embodiment, the extension has the same outer diameter as the body of the original flashlight so that it fits in the same mounts as the original flashlight. Where the flashlight body and extension have a thin sidewall surrounding the batteries so that there is insufficient thickness available to form threads in the sidewall of the portion of the extension that mates with the body and still leave room for a battery to pass through, then the battery in the extension is spaced away from that end and a cylindrical insulated bushing with an axial electrical conductor is provided therein to make electrical connection between the battery in the extension and the battery in the body. A longer and more powerful flashlight is obtained with no wasted parts, and which accepts a higher voltage, brighter light bulb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.