US PATENT SUBCLASS 303 / 75
.~.~ Preventers

Current as of: June, 1999
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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

*  DD  RELEASING {3}
68  DF  .~ Motor {5}
75.~.~ Preventers {4}
76  DF  .~.~.~> Motorman valve control
77  DF  .~.~.~> Control-pipe pressure
78  DF  .~.~.~> Auxiliary-reservoir control
79  DF  .~.~.~> Loaded valve

DEFINITION

Classification: 303/75

Devices for preventing the release of the motor.

(1) Note. These are known as "pressure- retainers".