Abstract: A pendulum type sensor includes a housing having a plurality of recesses, each receiving a sensor module. The sensor module includes a mass assembly, a spacer assembly and a contact assembly sandwiched together and secured to each other. Each assembly includes a support defining an enclosure, with the mass assembly enclosure receiving a sector shaped recess of the spacer assembly to locate the mass and deflectable wire of the mass assembly in an unactuated preload position. The contact assembly includes a plurality of contact fingers engaged by the mass upon movement to actuated position and an ultimate stop which prevents turning moments on the mass upon engagement of the contact fingers with the ultimate stop under the force of the mass.

Abstract: A vehicle road speed control system in which the engine intake manifold pressure and the engine exhaust manifold pressure are utilized on opposite sides of a servomotor power wall to control the engine throttle and maintain a desired constant vehicle speed. The intake manifold pressure is normally subatmospheric and the exhaust manifold pressure is normally superatmospheric. Within the usual operating range of vehicle engine loads, the pressure difference between the two pressures remains substantially constant and provides a more uniform pressure differential than that provided in systems in which atmospheric pressure is the higher of the two pressures. The intake manifold pressure has a control valve in the conduit leading to the servomotor which varies the value of the pressure difference delivered to the servomotor in accordance with a control signal generated by a comparison of desired vehicle speed and actual vehicle speed.