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156 
Clayton Dewandre Take Over Oetiker Brake
Page 74
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A CCORDING to the Clayton
Dewandre Co., Ltd„ Lincoln, the majority of drivers prefer independent control of an exhaust-brake system. To meet the demand for both foot and hand control of the servo valve, a plunger-operated unit for floor mounting on the left of the clutch pedal has now been produced by the concern, in addition to the hand-lever control fitted to the steering column.
The brake is actuated by vacuum, air pressure or hy draulic power, according to the type of friction-brake servo employed, the latest system to be developed being the constant-flow hydraulic type. The Clayton I3ewandre company have taken over the manufacture of the Swiss Oetiker exhaust brake for markets in this country and overseas. There are now 27 variations of control equipment manufactured or ready for production.
Vehicles not equipped with poweroperated friction brakes can be fitted with an exhaust brake actuated mechanically by a lever or foot control. Automatic operation of the valve can be provided by fitting a pad on the brake pedal which contains a microswitch wired to a solonoid operating the control valve. The micro-switch is actuated by initial movement of the pedal before the friction brakes are applied.