Powered Thermal Switch
Original Publication Date: 1978-May-01
Included in the Prior Art Database: 2005-Feb-20
Improved sensitivity of a thermal switch insures better protection against module destruction. Thermal switches are often used in logic module gates to shut off the power in the event of an over-temperature condition, such as the failure of a cooling fan. A problem exists in that air is a good insulator and, when a fan fails, a long time period can elapse before the heat dissipated by a source is transferred through the air to the thermal switch. This time lag can allow damage to occur to the logic circuits. This is prevented by providing a powered thermal switch with an efficient heat path.