. Railway mechanical engineer . ptical Company, Rochester, X. V.,for taking highly magnified photographs of sections of ironand steel structure. One essential object of this device isto determine the structure of a test piece of steel under con-sideration and it often proves valuai)le in determining thecause of failure of metal parts. This new camera has been designed for maximum efficiencyand convenience in use, Iseing regularly supported on a lowstand for use on a laboratory table or for use on a suspendedlilatfomi. It is offered to those desiring a thoroughly effi-cient equipment for metall
. Railway mechanical engineer . ptical Company, Rochester, X. V.,for taking highly magnified photographs of sections of ironand steel structure. One essential object of this device isto determine the structure of a test piece of steel under con-sideration and it often proves valuai)le in determining thecause of failure of metal parts. This new camera has been designed for maximum efficiencyand convenience in use, Iseing regularly supported on a lowstand for use on a laboratory table or for use on a suspendedlilatfomi. It is offered to those desiring a thoroughly effi-cient equipment for metallographic work with size of platelimited to 5 in. by 7 in., and with the possibility of using spe-cial accessories for low power work. The stand is a heavy cast-iron rim plate supported on twofeet with leveling screws having a spread of ISJ/2 in. The two sections of the optical ijed, each 25 in. long graduated inmillimeters and marked in centimeters, are attached to theplate bv means of four supports, one pair for supporting the. Bausch & Lomb Complete Metallographic Outfit Mav. 1922 RAILWAY MECHANICAL ENGINEER 287 camera parts and the other the illuminating system. Thetotal overall length is 63 in. The camera consists of two wooden frames connected bybellows, with a total extension of 24 in. from eye piece toplate, with cast iron supports attaching to the optical bedby clamping blocks. The rear frame is fitted with a hingeddoor with springs holdins; the plate holder firmly in position, while the front frame is fitted with a front board, flange andlight-tight connector for connecting with the eye piece of themicroscope. The illummant is either a Tungsarc with starting and con-trolling resistance or a 6-volt, 108-watt lamp with transformerin a housing supported by a single post, adjustable forheight. Unusually Powerful Vertical Surface Grinder THE machine, illustrated, is one of the heaviest and mostpowerful vertical spindle surface grinders ever built,being a recent addition to
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
