Abstract: An electromagnetic clutch apparatus for providing a reversible mechanical linkage between a driving motor and its mechanical load and which is particularly well suited for use as part of an electrically actuatable automotive cruise control system. The apparatus is inherently self-disengaging, thereby limiting the maximum mechanical load against which the driving motor may operate. The apparatus is designed to be placed between the final output gear of a gear train and the engine throttle and yet overcomes the problems associated with such a placement because the mechanical torque which the clutch is designed to transmit is not directly related to the electromagnetic force required to keep the clutch engaged.

Abstract: A cruise control system of the type utilizing an electrically operated DC servo motor to move an element that varies the fuel-air mixture of a motor vehicle engine to control the speed of the motor vehicle is provided with apparatus for detecting the limit positions of the element and to modify the electric current supplied to the motor accordingly.

Abstract: Cruise control system and method for maintaining a vehicle such as an automobile at a desired speed. An overspeed sensor monitors the engine speed and disengages the system in the event of a sudden increase in the engine speed, as occurs, for example, when the clutch of a vehicle having a manual transmission is disengaged.

Abstract: A transducer driver circuit is disclosed in which a pair of transistors and a pair of transformers are connected together to drive an ultrasonic cleaning apparatus.

Abstract: A circuit is disclosed for providing an 80 kilohertz sine wave to an ultrasonic transducer which includes an 80 kilohertz square wave generator driving a transistor having the primary of a transformer in its collector circuit. The secondary of the transformer drives a power transistor which has the transducer drive circuitry in its collector circuit. The transducer drive circuitry includes a transformer whose primary is connected in series with an inductor. The secondary of the transformer drives the transducer and has a capacitor connected thereacross. A third winding of the transformer is connected to have its output rectified to serve as a power supply for the square wave generator.

Abstract: The present invention shows an air conditioning system for use on an automobile. The compressor and condenser are located under the hood of the automobile with an evaporator being located inside of a console shaped assembly within the interior of the automobile. Intake louvers are located between the front seats with a blower forcing the air through a duct formed by the console over the transmission tunnel. The return air moves through an evaporator coil located within the console to refrigerate the air. The refrigerated air is then turned approximately 180.degree. and discharged above the console area. Additional louvers for cooling the sides are optional.