A Pocket-Book of Electrical Rules and Tables; For the Use of Electricians and Engineers (Paperback)

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. 1894 Excerpt: ...twill, selvege-edged tape, of the best qualHy, of an inch broad, the strength and closeness of the web being of great importance. The tape to be prepared with a thick coating of ozokerit compound, and to be wouud on G. P. with a lap of not less than of an inch. Samples of the tape iutended to be used, both plain and compound, to be submitted for approval with quotation. Odls.--The wire to be made up in continuous coilB of 1,760 yards each. Testing. Ac--The coils shall have been immersed in water at 7o F.. for a period of not less than twenty-four hours, previous to being tested by the representative of the Company. The whole to be approved by the Company's representa-tive before delivery. Inspection, --The Company's representative to be allowed to inspect the wire during the various stages of manufacture. Specification For Galvanized Tubular Iron Poles. The poles to be of two sizes only, with an inside diameter of 2j ins. and 3 ins. respectively; the number and various lengths of each according to the Company's requirements; and the whole consignment to be delivered free to the Company's Storea. The iron to be of good quality, free from scale and blisters, and capable of resisting a tensile strain of 20 tons per square inch of Beotioo. The tubes to be of a uniform thickness of i in. through-out their length, weighing not less than l"l lbs. per foot run in the case of those with an inside diameter of 2$ ins. and 8-85 lbs. per foot run in the case of those with an inside diameter of 8g ins. Each length to be straight and true longitudinally, and of true circular form throughout, properly and securely welded up. A in. collar, 1J in. deep, to be shrunk on one end of each of the larger tubes, fitted close to the end, and made perfectly fast sind...