Motor Wheel Corporation

Harold C Hubbard

A hydraulic transducer of the Bourdon tube type, in which the amount of light transmitted by a light emitting diode to a photoresistor is controlled by a shutter. The device provides an enclosed and compact transducing unit which has particular application with tractor/trailer braking systems.

Hydraulic pressure transducer with electrical output

A remote control circuit for regulating current to electric trailer brakes as a function of the brake fluid pressure within the tractor brake system or in response to activation of a control arm by the tractor operator. A hydraulic transducer is connected directly to the tractor brake system to produce an electrical signal at the control circuit which varies as a function of the hydraulic fluid pressure. An electromagnetic, pressure-responsive circuit is also disclosed which is operatively connected to the trailer brakes and which retards movement of the operator control arm at the control circuit in proportion to the brake torque applied at the trailer.

Remote control circuit for electric trailer brakes

A remote control circuit for regulating current to electric trailer brakes as a function of the brake fluid pressure within the tractor brake system or in response to activation of a control arm by the tractor operator. A hydraulic transducer is connected directly to the tractor brake system to produce an electrical signal at the control circuit which varies as a function of the hydraulic fluid pressure. An electromagnetic, pressure-responsive circuit is also provided which is operatively connected to the trailer brakes and which retards movement of the operator control arm at the control circuit in proportion to the brake torque applied at the trailer.

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Lansing, MI, United States of America

Harold C Hubbard