Catalogue and Price-list of Fine Imported and American Machinery: Tools, Materials, and Supplies for Machinists, Jewellers, Watchmakers ...

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1875 - 112 páginas
 

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Página 70 - The advantages of these scales are, they expand and contract nearly the same as drawing-paper, do not soil the work, and distances can be set off from them without the use of dividers.
Página 3 - ... can be sent by mail to any part of the United States for one per cent, and the lower denominations of gold without any additional postage upon the letter.
Página 70 - Willis, of Cambridge University, England, for describing the correct form for the teeth of wheels, and the templets and cutters used in making them.
Página 26 - BB are two of the three keys that are drawn up and pushed down by the nut. A groove is turned inside the nut, A, which catches the head of the key, B, and thus draws them up to tighten the work.
Página 70 - The Diagraph is a new and valuable invention for drawing diagrams and platting surveys, by which the rapidity of platting is increased fourfold.
Página 72 - THE AMERICAN STANDARD WIRE GAUGE. Adopted by the Brass Manufacturers, January, 1858.

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