Harper-Wyman Company

Furnas Electric Company

Michael Bodnar

A thermostat for an electric/gas oven includes a first electrical contact, a second electrical contact, a switch spring arm for moving the electrical contacts into and out of engagement and a pair of actuators for coupling forces to the switch spring arm. An enclosure encloses the switch spring arm and the first and second electrical contacts. The enclosure has axially aligned channels extending through opposed walls for slidably receiving the actuators. A temperature responsive subassembly includes a mechanism for movement responsive to changes in oven temperature and a spindle subassembly including mechanism for movement responsive to manual rotation of a spindle. A frame supports the enclosure and supports both the temperature responsive subassembly and the spindle subassembly in operative position with respect to the actuators. A self cleaning temperature calibration mechanism selectively determines a self cleaning oven temperature setting. The self cleaning temperature calibration mechanism comprises cooperating members coupled to the spindle and the enclosure to limit rotation of the spindle and accurately determine the self cleaning oven temperature.

Gas/electric oven thermostat with self cleaning temperature calibration

A pressure responsive switch includes a diaphragm exposed to a pressure source and operating combination of levers to open and close a switch at predetermined pressure values. To prevent operation of a pump motor at abnormally low values, an element is provided between the diaphragm and the switch operating means to open the contacts.

Growing community of inventors

West Chicago, IL, United States of America

Michael Bodnar