SYMPOSIUM ON BRAKING SYSTEMS IN RAILWAYS: MODERN SYSTEMS OF BRAKING UNITS AND BRAKES WHEN THE TRAIN IS STATIONARY

IN PASSENGER TRAINS INCREASE IN SPEED AND THE TENDENCY TO REDUCE WEIGHT PER AXLE REQUIRE IMPROVEMENT IN BRAKING EQUIPMENT. FOR HIGH SPEEDS, THE BRAKES USED ARE: (1) SHOE (2) DISC (3) FOUCAULT CURRENT BRAKES ON THE AXLE, (4) HYDRODYNAMIC BRAKES. ADDITIONAL BRAKES WHICH DO NOT RELY ON ADHESION ARE: (1) MAGNETIC SHOE (2) LINEAR INDUCTION (3) AERODYNAMIC BRAKES. IN ORDER TO USE THE WHEEL/RAIL ADHESION TO ITS MAXIMUM NON-SKID EQUIPMENT IS USED. ON MODERN TRAINS THERE IS GENERALLY TOO LITTLE SPACE FOR THE INSTALLATION OF A HEAVY BRAKING SYSTEM, AND INDIVIDUAL AND INDEPENDENT BRAKING LIMITS HAVE BEEN INTRODUCED FOR EACH BRAKE; THESE COULD BE DISC OR SHOE BRAKES. SAAB HAS DEVELOPED A COMPLETE NEW RANGE OF BRAKING UNITS WHICH ARE DESCRIBED. DETAILS ARE GIVEN OF BRAKES USED FOR STATIONARY POSITION: (1) HAND-OPERATED MECHANICAL (2) SPRING-OPERATED (3) PARK-LOCK BRAKES, (4) HYDRAULIC BRAKES. A RAPID SYSTEM OF RELEASING STATIONARY BRAKES IS DESCRIBED. SEE ALSO IRRD ABSTRACTS NOS 106205, 106207 TO 106213.