Sequential ignition system for oxygen generation elements
US4115069A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1977 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Jun 10, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B13/0296
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Three chlorate candles are connected to a common conduit to which a normally open pressure switch is connected on the downstream side. The switch closes in response to a flow rate less than its predetermined minimum magnitude of oxygen from each candle flowing through the conduit. The pressure switch and one thermal switch for each candle except the last one are serially interconnected across a DC source through a resistor. When that candle first ignited is weakened in generation of oxygen, the next candle is ignited with the closure of the two serially connected switches and through the resulting heating of the associated resistor. The third candle is similarly ignited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.