. Railway master mechanic [microform] . hears and horizontalpunches, beveling and splitting shears, aswell as the almost universal Lennox rollingshears for bevel and irregular work. Thetools necessary are those for making fireboxboilers, and in addition to these there is us-ually much car iron work to be handledwhich requires some small quick-actingpunches and bar and angle-iron shears. A characteristic tool is the punch andshear with automatic spacing table. Forpunching boiler plates geared spacingtables and multiple punches economizetime and labor, two men punching 1,000holes in an hour. Spa
. Railway master mechanic [microform] . hears and horizontalpunches, beveling and splitting shears, aswell as the almost universal Lennox rollingshears for bevel and irregular work. Thetools necessary are those for making fireboxboilers, and in addition to these there is us-ually much car iron work to be handledwhich requires some small quick-actingpunches and bar and angle-iron shears. A characteristic tool is the punch andshear with automatic spacing table. Forpunching boiler plates geared spacingtables and multiple punches economizetime and labor, two men punching 1,000holes in an hour. Spacing is usuallyeffected by pawls and escapement gearing similarto that used in gear-cutting machines. Fig. 1 showssuch a machine by Bement, Miles & Co. (now Niles-Be-ment-Pond Co.), arranged for bevel shearing the edgesand rapid punching of rivet holes in single or doublerows. Fig. 2 shows a machine for punching holes inboiler plate, and having a screw-feed spacing table. Thisis made by the Long & Alstatter Co., Hamilton, jo. 4—20-inch Throat Punch, Motor Driven, Sennett Co., Youncstown. Fig. 5—Double Punch, Motor Driven, Cincinnati Punch & Shear screw is diagonal to the bed and causes the travel ofa nut moving in a slot in a revolving spacing table. Thetable set at zero will space the pitch of the screw, and seteither way from zero will space greater or less, evensixteenlhs being fed through a ratchet. At the movement 54 RAILWAY MASTER MECHANIC February, 1904. of punching the plate is clamped automatically upon thedie, the same device serving for a stripper. It is the embarrassment of riches to attempt to illus-trate the designs of different American builders and givetheir features of design adequate justice in so short an
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Keywords: ., bookcentury1800, bookdecade1890, bookidrailwaymaste, bookyear1895
