Quotables
"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 6322352 | Gas burner system A stove burner safety system has an electromagnetic valve and a manual gas cock controlling the gas flow to the burner and a spark plug adjacent the burner which receives a spark pulse from the electric circuitry which also controls an electromagnetic val... | 11/27/2001 |
| 6164958 | Safety system for gas range A safety system for a gas burning device, such as a gas range having a plurality of burner assemblies. The safety system generally comprises a gas supply valve, a gas flow sensor, a gas leak warning circuit, a no-flame warning circuit, a gas supply valve ... | 12/26/2000 |
| 5584679 | Gas leakage protection apparatus Gas leakage protection apparatus includes a pressure-differential sealing device and a thermal electricity converting device installed at a burner head for converting the heat of the fire into electric energy which is supplied to a solenoid valve at a bot... | 12/17/1996 |
| 4627416 | Water heater A water heater is disclosed having a heat exchanger, a main burner means for heating the heat exchanger, a standing burner, a main fuel passage means for supplying fuel to the main burner, a manual valve on the main fuel passage means which is operable by... | 12/09/1986 |
| 4613300 | Burner safety system Burner apparatus including fuel burners and a pilot light burner associated with each fuel burner. A solenoid-operated valve controls the supply of fuel to the fuel burners. Thermocouples heated by the pilot light burners energize electromagnetic coils th... | 09/23/1986 |
| 4437830 | Burner and pilot valve safety control system The movable elements of two normally closed valves are actuated by a thermal element responsive to ignition at a pilot burner supplied fuel through one of the valves. The two valve elements form a mechanical train from the thermal element which simultaneo... | 03/20/1984 |
