. Railway mechanical engineer . it 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 illu
. Railway mechanical engineer . it 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 the line of grinding ma-chines made bv the Blanchard Machine Companv, Cam-. 1—Blanchard No. 27 ■ R High Po Vertical Surf, ijridge, Mass. Fig. 1 shows the front view of this machine,which is known as the No. 27-R. The overall dimensionsof the machine are 12 ft. 6 in. long, 7 ft. 6 in. wide, U) , and the total weight is .>(),000 lb. In general arrangement it is similar to the Xo. 1() Hlancli-ard grinder and ojierates in the same way. The work iscarried on a rotary magnetic chuck, 48 in. in diameter, whichis moved horizontally from the loading to the grinding(Kjsition, and there rotated continuously while the wheel isgradually fed downward. Owing to its size and weight theNo. 27 chuck and table is traversed by [xjwer. In otherresfjfcts the of)eration is like that of the No. 16. The grinding wheel is 27 in. in diameter, 7 in. fleej), withrim either 2 in. or .S in. thick. It is .sul|)hur mounted in iron retaining ring, attached to the face|)late by , and is wire-banded. The wheel head weighs threetfjDS
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
