BRAKE LOCKING CIRCUIT OF LOCOMOTIVE CONTROL CONSOLE Russian patent published in 1994 - IPC

FIELD: railway transport. SUBSTANCE: pneumatic circuit has driver's brake valve connected through double heading cock with feeding main line. Brake valve is connected with brake line through main line branch and combined cock. Auxiliary brake valve communicates through cut-off coock with feeding main line and through one of input of three-way cock, with brake cylinders. Second input of three-way cock, through maximum pressure valve, communicates through first non-return valve with main line branch of brake valve, and through second non-return valve and disconnecting-type electropneumatic valve, with feeding main line. Contact element is mechanically driven by detachable handle of three- way cock. Handle of three-way cock has two fixed positions. With handle in first fixed position (open) air line communicates with auxiliary brake valve. In second fixed position (closed) air line communicates with maximum pressure valve. Handle of three-way cock can be removed only when cock is closed. EFFECT: enhanced reliability of operation. 3 cl, 2 dwg