Lamp pressure checking device
US4337645A · kind A · utility
0Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Dec 15, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/329
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and apparatus for checking the internal pressure of a filled lamp bulb. According to the invention, a filled bulb to be checked is inserted into a gas tight chamber; the chamber is then sealed and pressurized. The lamp envelope is broken by means in the chamber. Chamber pressure is measured before and after breaking the envelope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.