The boy mechanic, book 3

by Unknown

Device for Sharpening Fiber Phonograph Needles

By Using This Needle-Sharpening Device the Life of Records is Prolonged

A practical sharpener for fiber phonograph needles may be made as follows: A lever handle, A, is cut from heavy sheet metal. A safety-razor blade, B, is bolted to it, and the metal flap bent over as indicated. A block, C, is cut so that the upper face makes an angle of 30° with the base, is faced with a metal strip, E. A triangular groove is cut or filed for the needle G. The lever is hinged, as shown, by means of a screw. A base, D, may be added. To operate the sharpener, place a needle in the groove so that a very small portion of the playing end extends past the face of E, and shear off the end.—C. M. Hall, St. Louis, Missouri.