Marine stove safety controls
OwnerRalph L. Ulrickseninventor
Life of this patent
Estimating the term…
Abstract
A thermostat is arranged to be responsive to the temperature of flue gases from an oil burning heater and actuates switches when the temperature of the flue gases reaches either a predetermined high value or a predetermined low value. The switches are effective, when actuated by the thermostat, to cut off flow of oil to the burner, either by stopping operation of a pump or by effecting closing of a valve in the oil supply conduit. The thermostat is provided with a latch that holds it in the high temperature position, when that position has been reached so that cooling of the flue gases thereafter will not result in resumption of oil flow to the heater. In one form of the invention the same circuit arrangement can be adapted to control either a pump-fed heater or a gravity-fed heater.
Claims1
In a safety control system for an oil burning heater having an oil supply conduit and control means therein for controlling flow of oil therethrough, the improvement comprising:
- electrically operated means for actuating said control means;
- temperature responsive thermostatic means positioned to sense a temperature that is indicative of the heat produced by said heater, said thermostatic means including a movable member;
- means responsive to movement of said member to actuate said electrical means to stop flow of oil in said conduit when the sensed temperature reaches a predetermined low temperature or a predetermined high temperature;
- manually releasable means engageable with said movable member to lock it in its position at said predetermined high temperature;
- said member being mounted for rotation about an axis with pin means extending radially therefrom;
- said means responsive to movement of said member being switch means arranged in the path of movement of said pin means;
- and
- said member being provided with a peripheral notch, said manually releasable means comprising a movable arm adjacent said member and having a portion projectable into said notch when said member is in said high temperature position, means biasing said arm toward said member, and means for manually retracting said arm from said notch.
Dependencies are inferred from the claim text.