| 摘要 |
<p>VARIABLE POWER CONTROL DEVICE A variable power control device for varying the operating duty cycle to an electrical load such as an electrical heating unit, for example, an electrical cooking range, heating pad and the like. The control device can be used to adjust the on time of the electrical load or the temperature of the electrical load. The control device includes a cycling cam which rotates at a constant angular velocity, and a rotatable movable adjustment cam. A cycling electrical contact switch is located with one contact thereof disposed to follow the contour of the cycling cam and the other contact thereof disposed to follow the contour of the adjustment cam. An on-off of electrical contact switch is associated with an on-off cam with one contact disposed to follow the contour of the on-off cam and the other contact being stationary.</p> |
