. Science of railways . Fig. 1. The Q & C-Priest Snow Flanger as Attached to Locomotive (Pilot Removed to Show Working Parts of Flanger.) caused by the intervention of snow and ice betweenthe driving wheels and rails. It avoids tire and railcutting due to slipping in snow. A pilot plow of any size can be carried in the usualmanner without interference with this device. AUTOMATIC BRAKE-SLACK ADJUSTER. While there have been many types of brake-slackadjusters used on cars and locomotive tenders, thatadjuster formerly known as the McKee, but now madeby the Westinghouse Co., and called by the latte
. Science of railways . Fig. 1. The Q & C-Priest Snow Flanger as Attached to Locomotive (Pilot Removed to Show Working Parts of Flanger.) caused by the intervention of snow and ice betweenthe driving wheels and rails. It avoids tire and railcutting due to slipping in snow. A pilot plow of any size can be carried in the usualmanner without interference with this device. AUTOMATIC BRAKE-SLACK ADJUSTER. While there have been many types of brake-slackadjusters used on cars and locomotive tenders, thatadjuster formerly known as the McKee, but now madeby the Westinghouse Co., and called by the lattername, has been used more extensively than any other. The accompanying engraving shows a coach ortender brake cylinder and levers with the Westing-house slack adjuster applied to the back head. As. Fig. Westinghouse Latest Improved Slack Adjuster. will be seen, a very small air pipe is tapped into thebrake cylinder at a point to clear the piston when thelatter has traveled seven and one-half inches. Thus,when the brake piston passes beyond this point asmall quantity of air is conveyed through this pipe toa very small cylinder wherein it forces a pistonagainst a heavy spring engaging a pawl in a ratchetwheel attached to the screw holding the back cylinder 572 ^ LOCOMOTIVE APPLIANCES. 573 lever. When the brake is released, the Spring, by meansof the pawl and ratchet wheel, turns the screw, therebymoving outward the inside end of back cylinder lever,which takes up about one-thirty-second of an inch ofpiston travel. When new brake shoes are applied thescrew should be turned back sufficiently to let out thetravel to about what it was before the new shoe wasapplied. The Gould slack adjuster is also a mechanicaldevice which works, however, on the ratchet princi-ple and without an
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