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accomplished accurate allow aluminum angle angle-plate annealed blank blank-holder body casting bored and reamed bottom brass broach bushings cast-iron centre channel chuck clamped clearance construction counterbored curling cutter cutting-edge diameter disk dovetailed dowel-pins drawing drawn drill-press edge face face-plate finished fixture flat gauge gear grinding groove ground hardened holder holes drilled inch index-pin interchangeable knurled lathe located and fastened lugs machine steel machine tools manner manufacturing means metal method micrometer milling mould necessary notches operation perforating piece piercing planed plate portion position produced pulley punch reamer removed revolutions per minute screws set-screws shape shown sheet metal sheet-metal shell shown in Fig side slide slot solder spindle square stnd strapped stripper surface swaging taper teeth templet threaded tion tool steel tool-maker turned turret-lathe
Page 508 - Rule. — Multiply the number of revolutions per minute of the countershaft by the diameter of the tight and loose pulleys and divide the product by the number of revolutions per minute of the lineshaft.
Page 541 - Patent is in no degree commensurate with the almost nominal cost of obtaining it. In order to obtain a Patent it is necessary to employ a Patent Attorney to prepare the specifications and draw the claims. This is a special branch of the legal profession which can only be conducted successfully by experts. For nearly sixty years we have acted as solicitors for thousands of clients in all parts of the world. Our vast experience enables us to prepare and prosecute Patent cases and Trade Marks at a minimum...
Page 246 - The shank can be threaded and fitted to a metal tube which acts as a boring bar and through which the chips and oil may pass from the point of the drilL Oil is conveyed to the point on the outside of the tube, as shown in Fig.
Page 543 - Many of the principal substances and raw materials used in the arts are described, and almost every inquiry relating to formulae will be found answered. It is more than a receipt book, as in most cases it gives all the standard and special formulae, thus enabling the reader to find a receipt which fits his peculiar need. An alphabetical arrangement with abundant cross references makes it an easy work to consult. Those who are engaged in any branch of industry will find this book of the greatest practical...
Page 542 - Every number contains sixteen large pages, beautifully printed, elegantly illustrated; it presents in popular style a descriptive record of the most novel, interesting, and important advances in Science, Arts, and Manufactures. It shows the progress of the World in respect to New Discoveries and Improvements, embracing Machinery, Mechanical Works, Engineering in all branches, Chemistry, Metallurgy, Electricity, Light, Heat. Architecture, Domestic Economy, Agriculture, Natural History, etc. It abounds...
Page 271 - These divisions are ten in number, and occupy the same 270 space as nine divisions on the thimble. Accordingly, when a line on the thimble coincides with the first line of the vernier, the next two lines to the right differ from each other one-tenth of the length of a division on the thimble; the next two lines differ by two-tenths, etc.
Page 537 - Thousands of Imitators. No Equal. Will hold Highest Pressure. Don't have to use Wire and Cloth to hold Rainbow. Can't blow it out. THE COLOR OF RAINBOW PACKING IS RED...
Page 542 - ... and profitable occupations. It promotes Industry, Progress, Thrift, and Intelligence in every community where it circulates. THE SCIENTIFIC AMERICAN should have a place in every Dwelling, Shop, Office, School, or Library. Workmen, Foremen, Engineers, Superintendents, Directors, Presidents, Officials, Merchants, Farmers, Teachers. Lawyers, Physicians, Clergymen— People in every walk and profession in life, will derive satisfaction and benefit from a regular reading of TBE SCIENTIFIC AMERICAN.
Page 5 - ... constructing, use, and installation of tools, jigs, fixtures, devices, special appliances, sheet-metal working processes, automatic mechanisms, and labor.saving contrivances; together with their use in the lathe, milling machine, turret lathe, screw. machine, boring mill, power press, drill, subpress, drop hammer, etc., for the working of metals, the production of interchangeable machine parts, and the manufacture of repetition articles of metal. $4.00 WOODWORTH. Dies, Their Construction and...
Page 508 - In any system of pulleys or gears, the general rule holds that the product of the diameters or numbers of teeth of the driving wheels and the number of revolutions per minute of the first driver must be equal to the product of the diameters or the numbers of teeth of the driven wheels and the number of revolutions per minute of the first driven wheel. As a formula this may be stated, RXDXD'XD"XD'"X etc. '"' dXd'Xd"Xd'"Xetc. where D, D', D", etc. are the diameters of the driving pulleys, d, d...