A method and circuit for protecting the output stage of an amplifier from thermal overload. A normally-open, temperature sensitive switch is thermally coupled to the transistors in the output stage and electrically connected across a portion of the feedback resistance element of the amplifier, in one circuit embodiment. Whenever the temperature of the transistors reaches a predetermined threshold level, the switch closes and acts as a low resistance path across that portion of the feedback resistance element, thereby reducing the gain of the amplifier to a safe level which is zero in the preferred embodiment. Thereafter, when the temperature decreases below the predetermined threshold level, the switch automatically opens to restore normal operation of the amplifier.
A lamp intensity control system combines the functions of the tail light, the brake light, and the turn indicator light signals into one signal for controlling a plurality of lamps in an automobile. The tail light, brake light and turn indicator light signals are combined into one signal and modulated wherein the percent of modulation determines the intensity of the brightness of the plurality of lamps. Temperature protection is provided wherein a temperature limit circuit monitors the temperature of a SENSFET and disables the SENSFET if its temperature exceeds a predetermined magnitude. Over-current and open lamp conditions are monitored by comparator circuits. An over-current condition causes the SENSFET to be disabled. An over-temperature, over-current or open-lamp condition is signaled by a fault output signal.
A front jaw for a safety ski binding comprising a housing (1) and two two-arm bent levers (9a, 9b) which are each pivotal about an essentially vertically oriented axis on a bearing block (6) supported for limited movement in the housing and engage a release plate (25) which is pivotally supported on the housing (1) and is loaded by a release spring (14) through a pull piece (28) with a forwardly directed pulling force, with the pull piece (28) engaging with its front end a spring-receiving means (15) which is movable along a center bolt (16), and the center bolt (16) being supported by means of a bolt head (17) on the front side of the housing (1) and being connected through a thread (18) to a spring-support plate (19) loaded by the release spring (14).
