Lampchanger
US4415951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1982 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Jun 16, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V19/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lampchanger preferably for use in a railroad signal lantern having a focusing lens which includes a horizontally rotatable turret adapted to support a plurality of lamps for indexing one of the lamps to the focal point of the lens. The turret includes a plurality of bayonet sockets for holding a lamp in which the sockets have resilient sides which taper inwardly away from the turret body for accurately securing the lamp in position. The turret includes a contact insulator having a radially extending slot adjacent each of the sockets with a power contact positioned in each of the slots. Each power contact includes a circular ridge for engaging the bottom of a lamp positioned in a socket for cleaning and making a good contact with the lamp. A power brush engages the rotatable turret and is positioned to engage the power contact and engages the slot of the insulator positioned in lamp operating position for mechanically holding the turret in position. A light detector is directed at the lamp in position in the focal point for detecting whether the lamp is lighted. And motor means is connected to the turret for rotating the turret when the light detector detects a burned out lamp. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.