Orientable lamp
US4706172A · kind A · utility
Inventor
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V21/32
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An orientable lamp adjustable both in elevation and angle to properly illuminate an area of interest. The lamp includes a low-voltage, high-intensity light bulb housing attached to the end of an extensible arm cantilevered from a base. The arm is constituted by a pair of superposed electrically-insulated metal tapes that are arched to resist flexure and are interconnected to the bulb terminals to function as a two-wire line. The tapes are windable on a spring-biased reel rotatable within a cylindrical casing mounted on the base and having a projecting nose from which the tapes emerge. The angle of the casing relative to the base is adjustable, whereby the angle of the cantilevered arm may be varied to adjust the angle assumed by the fixture. Also supported on the base is a step-down transformer connected by sliding contacts to the tapes on the rotatable reel to supply low-voltage power to the two-wire line to energize the bulb. By extending or retracting the tapes to lengthen or shorten the arm, one can thereby adjust the elevation of the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.