Handy man's workshop and laboratory . Fig. 209—A magneto machine of simple construction giving electric shocks. Of the various devices for producingshocks nothing is more convenient and satisfactory than themagneto machine. A simple magneto-machine of novel construction designedespecially for physiological effects is here described. Fig. 209shows the completed machine. Fig. 210 gives details of con-struction. HANDY MAN S WORKSHOP AND LABORATORY 253 Four ordinary 5-inch horseshoe magnets, d, are clamped in abundle with their like poles in contact upon a horizontal brassshaft, a, 3/16 of an inch
Handy man's workshop and laboratory . Fig. 209—A magneto machine of simple construction giving electric shocks. Of the various devices for producingshocks nothing is more convenient and satisfactory than themagneto machine. A simple magneto-machine of novel construction designedespecially for physiological effects is here described. Fig. 209shows the completed machine. Fig. 210 gives details of con-struction. HANDY MAN S WORKSHOP AND LABORATORY 253 Four ordinary 5-inch horseshoe magnets, d, are clamped in abundle with their like poles in contact upon a horizontal brassshaft, a, 3/16 of an inch in diameter. The magnets are held, twoon each side of the shaft, by clamping plates, b, of thick sheetbrass, drawn together against the faces of the magnets by smallbrass machine screws. At their butts the pairs of magnets bind directly upon theshaft; at their open ends they clamp upon a rectangular strip ofNo. 22 sheet brass, c, half an inch wide, soldered transverselyupon the shaft near the ends of the Fig. 210—Details of the construction At its middle the brass strip has bent into it a shallow cross-groove, y, conforming to the shape of the shaft, the depth of thegroove being just sufficient to bring the plane of the wings ofthe cross-piece coincident with the shafts axis. In front of the magnets poles are fixed, horizontally, two bob-bins of fine insulated wire, e e. The bobbins have ^-inch softiron cores, f,il/2 inches long, attached by small machine screws,h, to the vertical limb of an iron yoke, g, made of 2x^-inchstrap iron bent at right angles and attached to the base of theinstrument with wood screws. 254 HANDY MAN S WORKSHOP AND LABORATORY The bobbins are formed by driving tightly upon the cores cen-trally apertured disks, i. of vulcanized fiber or hardwood ]/% inchthick and Ij4 inches diameter. The space between the bobbinheads for each coil should be V/% inches. An insulating wrappingof paper is shellacked upon the cores between the heads andfitted t
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
