Optical signalling device of the luminous tube type
US4931766A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F13/26
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An optical signalling device has a partially transparent envelope (2), a substantially U-shaped luminous tube (10) containing a gaseous atmosphere being placed within the envelope and supplied by a capacitor (C) which is charged and discharged by electric circuits placed on a printed circuit card (17). Within an insulating casing (4) having an end-wall (13) and side walls (14, 15), there is placed and maintained a printed circuit card (17) which carries conductive tracks (38, 39) soldered directly to the supply terminals (36, 37) of the gas tube (10). The gas tube is placed in a plane substantially parallel to a longitudinal axis of the casing and has two portions (32a, 33a) adjacent to the ends of its parallel arms (32, 33) which are securely clamped between two resilient lips (44) forming part of the end-wall (13) through which they pass. The bent region (35) of the tube extends externally of the end-wall and is protected by a transparent cover (5) of the envelope (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.