Vehicle speed control device

Details Vehicle speed control device Vehicle speed control device

1975-01-13

1976-06-29

Kunin, Stephen G.

Railway switches and signals

Cab signal or train control

Speed-control systems

137112, B61L 310

Patent

active

039661504

ABSTRACT:
A railroad car maximum speed limiting device including a railroad car wheel-driven generator and centrifugal speed responsive switch for operating a solenoid valve to supply vacuum to the vehicle brakes from an auxiliary vacuum reservoir after the vehicle has passed a magnetic trip operating a relay to complete the genertor circuit, the improvement comprising an air cylinder operated by trainline vacuum for moving the generator and centrifugal speed responsive switch wheel out of engagement with the car wheel for trainline operation, and a special shuttle valve on the cylinder for supplying braking vacuum to the cylinder alternately from the speed control auxiliary vacuum reservoir or from the main conventional vacuum reservoir.

REFERENCES:
patent: 2982260 (1961-05-01), Hunter
patent: 3584214 (1971-06-01), Peterson
patent: 3660653 (1972-05-01), Peterson

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