. Air brake text for engineers and firemen; . PLATE 84. under which it is advisable to have it correspond to a quick actiontriple; that is, vent brake pipe air into the brake cylinders in anemergency application. To obtain this result, cylinder cap 23 i88 NO. 6 ET LOCOMOTIVE BRAKE EQUIPMENT. (Plate 74) is replaced by the quick action cylinder cap shown onPlate 84. In an emergency application, as equalizing piston 26 movesto the right and seals against the gasket (Plate 85), the knobon the piston strikes graduating stem 59, which compresses MR. PLATE 85. equalizing piston graduating spring 46 a
. Air brake text for engineers and firemen; . PLATE 84. under which it is advisable to have it correspond to a quick actiontriple; that is, vent brake pipe air into the brake cylinders in anemergency application. To obtain this result, cylinder cap 23 i88 NO. 6 ET LOCOMOTIVE BRAKE EQUIPMENT. (Plate 74) is replaced by the quick action cylinder cap shown onPlate 84. In an emergency application, as equalizing piston 26 movesto the right and seals against the gasket (Plate 85), the knobon the piston strikes graduating stem 59, which compresses MR. PLATE 85. equalizing piston graduating spring 46 and moves slide valve48 to the right, opening port ;. The brake pipe pressurein chamber p flows to chamber X, forces check valve 53downward, and passes to the brake cylinders through port m in NO. 6 ET LOCOMOTIVE BRAKE EQUIPMENT. 189 the cap and distributing valve body. When the pressures in thebrake cylinders and the brake pipe equalize, check valve 53 isforced to its seat by spring- 54, thus preventing the air in thebrake cylinders from flowing back into the brake pipe. When arelease of the brakes occurs, and piston 26 is moved back to itsnormal position (Plate 76), spring 46 forces graduating stem 59and slide valve 48 back to the position shown on Plate 84. In all other respects, the operation of a distributing valve pro-vided with this cap is the same as previously described. DEFECTS OF THE DISTRIBUTING VALVE. Leaks. If application valve 5 leaks or becomes cut, allow-ing air to pass it while in lap position, it will increase the bra
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