Patent ID: 7170388
Filing Date: 2007-01-30
Classification: H01H

Abstract:
1. A thermostat comprising: a switch having contacts; a sensor generating a force to operate the switch in response to an ambient temperature; a lever provided with an arm, the lever turning with the force from the sensor to open/close the contacts of the switch; a spring having a first end hooked to the lever and a second end, the spring biasing a force to the lever in a direction opposite to the force from the sensor; and a control plate hooked to the second end of the spring and disposed on the lever, the control plate increasing/decreasing a force required for turning the lever due to turning of the control plate, wherein the arm turns together with the control plate to open the contacts of the switch when the control plate turns at more than a predetermined angle, and the arm has a ridge provided on a side facing the control plate, the ridge making contact with the control plate.