Rail bonds and appliances Volume 3; Catalogue [no. 3] and manual

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...every particular. They are unique and simple in their design and construction and make a long step forward in the evolution of rail bonding. Easily handled and operated, they work rapidly and accurately. All machines shown (except Nos. 19 and 21-M) are rigidly attached to the rails with a vise-like grip. Those which are attached to the head of the rail can easily be placed in position or removed in eight (8) seconds, and without disturbing the joint plates. Each machine has a positive automatic feeding device which can be controlled at will. The drills are operated with a vertical hand lever or with a O00-volt D. C. series wound electric motor. It has been demonstrated beyond question that a man can do a given amount of drilling much easier by operating a lever than he can by turning a crank. In every hand-operated machine each half stroke of the lever rotates all drills forward through equal angles of rotation. In all multiple-spindle drilling machines each separate spindle is provided with an adjusting nut so that each drill can be adjusted independently of the others. This provision offsets uneven wearing of drills or setting of rails. The drill points are held rigidly in the machine and therefore seldom break or chip. Eor the same reason the holes may be started without first prick punching the rail. Where necessary the machines are equipped with gauges for determining the correct depth of holes, and with screws to raise or lower the frames quickly so as to bring the drill points into their correct position. The levers by which the machines are operated are detachable and in many cases serve as handles for carrying the tools, and as wrenches for attaching the drills to the rails. Each drilling machine is equipped with all fittings and one set of new dri...