The Carborundum Company

James A Hirsch

Martin R Kasprzyk

Elwood B Hausler

Charles J Boos

Elmer G Smith

An apparatus for fuel ignition comprising an electrical source for providing electrical current; an electrically operated fuel ignition means; a valve means which allows passage of fuel to the ignition means when the valve means is opened; a first valve control means which will open the valve upon application of an electrical current and a second valve control means which will retain the valve means in an open position but will not initially open the valve upon application of an electrical current; an activating switch electrically connected between the electrical source and the rest of the apparatus so that the apparatus will not operate unless the activating switch is closed; a time delay switch connected between the activating switch and the rest of the apparatus and connected to an ignition sensing switch means so that the time delay switch stops the flow of electrical current to the rest of the apparatus if the ignition sensing switch means does not sense ignition within the time delay; and an ignition sensor for sensing ignition and an ignition sensing switch means responsive thereto. The ignition sensing switch means, when the activating switch is closed, switches electrical current from the first valve control means to the second valve control means after ignition is sensed, shunts out the time delay relay after ignition is sensed and disconnects the ignition means after ignition is sensed. If the ignition sensor ceases to sense that ignition is taking place, the ignition sensing switch again connects the first valve control means, the time delay relay and the ignition means.

Gas ignition control

A composition comprising negatively doped hot pressed particulate silicon carbide, the process for making the composition, an electrical hot surface fuel ignitor manufactured from the composition, a silicon brazed electrical connection for the ignitor and an ignitor circuit containing a dropping resistance.

Method for providing electrical connection

Fuel ignitor comprising a novel silicon carbide composition

Fuel igniter comprising a novel silicon carbide composition and process

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Niagara Falls, NY, United States of America

James A Hirsch