Thermally responsive control for a vacuum cleaner motor

In a thermally responsive control for a vacuum cleaner motor having a low voltage control circuit and provided with at least one fan, driven by said motor and a dust separating filter, said fan upon operation of said motor conveying the dust-laden air through said filter, the improvement comprising:

• a temperature sensing means located in proximity to said electric motor which automatically switches off said motor when the motor temperature exceeds a given level, said temperature sensing means being provided with a bimetallic element and a metallic spring, the latter having an opening therethrough and under normal operating conditions making electrical contact with said bimetallic element, said temperature sensing means further comprising a magnet which functions to break the contact between said metallic spring and the bimetallic element when the latter bends due to an increased motor temperature, an electrically insulated separator pin connected to the free end of said bimetallic element and extending through said opening in said metallic spring toward said magnet, and said temperature sensing means being built into said low voltage control circuit of the motor.