. Science of railways . Fig. Arrangement ior Automatic Sanding. LOCOMOTIVE APPLIANCES. 683 THE HUFF PNEUMATIC TRACK SANDER. The Huff track sander is the invention of a locomative engineer of long experience, and embodies newfeatures suggested to him by his personal knowledgeof many track sanders which have preceded this one. The construction and operation of this sander areillustrated by Figs. 1, 2, 3 and 4, in which Fig. 1shows the device as a w^hole; Fig. 2 each part sepa-rate of which it is composed; Fig. 3 its apphcation to alocomotive and pipe connections thereto; and Figl 4.
. Science of railways . Fig. Arrangement ior Automatic Sanding. LOCOMOTIVE APPLIANCES. 683 THE HUFF PNEUMATIC TRACK SANDER. The Huff track sander is the invention of a locomative engineer of long experience, and embodies newfeatures suggested to him by his personal knowledgeof many track sanders which have preceded this one. The construction and operation of this sander areillustrated by Figs. 1, 2, 3 and 4, in which Fig. 1shows the device as a w^hole; Fig. 2 each part sepa-rate of which it is composed; Fig. 3 its apphcation to alocomotive and pipe connections thereto; and Figl 4. 1. Huflf Pneumatic Track Sander. the engineers valve in the cab, by which the mechan-ism is operated. The body A is inserted into the old gravity sandpipe (which is otherwise undisturbed) at any con-venient point, either above or below the runningboard. The compressed air supply pipes are con-nected at F F, and the sand delivery pipes are led offat G G. The lever D, operating the foot valve B,should be connected, by suitable means, to the cab, sothat it may be under control of the engineer. A thin 684 LOCOMOTIVE APPLIANCES. sheet steel partition is inserted into the old sand pipes,extending from the dome down to the Huff device,forming a junction with a bridge in the device; this isto facilitate blowing out possible obstructions in thesand delivery pipes, as will be referred to later. Eachof the two feed tubes F contains an air adjustingtube H, which, in turn, contains in one end the bridge
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