. American engineer and railroad journal . TJ.^ SMOfr//\/ff ceo^CO JFM^^ straight push sash operator. Several different sizes of wheels are made which gives theincreased power required as the number of sash to be operatedis increased. Any number from lO to loo or more sash areeasily placed under one control with this operator. The material is heavy and the few connecting couplings ar^simple and of substantial strength to withstand strain as well asto resist the corrosive effects of gas and acid fumes. The apparatus is adapted to operate pivoted side or pivotedtop-and-bottom sash, hinged-at-the
. American engineer and railroad journal . TJ.^ SMOfr//\/ff ceo^CO JFM^^ straight push sash operator. Several different sizes of wheels are made which gives theincreased power required as the number of sash to be operatedis increased. Any number from lO to loo or more sash areeasily placed under one control with this operator. The material is heavy and the few connecting couplings ar^simple and of substantial strength to withstand strain as well asto resist the corrosive effects of gas and acid fumes. The apparatus is adapted to operate pivoted side or pivotedtop-and-bottom sash, hinged-at-the-top or hinged-at-bottom operating parts which are very few cannot rust together, asthe connections are phosphor bronze-to-iron, the same principlebeing carried out as is applied to pipe unions for steam insures its operation at any saws that have been available have been too large and expensivefor this work. Recognizing this condition, and at the request of a number ofrailroad mechanical men, Joseph T. Ryerson & Son, Chicago,have designed a high-speed fricton saw which is particularlyadapted for this purpose. It is a remarkably simple machine andhas a capacity for cutting continuously 15 in., 80 lb., I beamswithout turning the beam. It will cut such a beam in from 28to 38 seconds. It needs no special foundation, and requires afloor space of but 7x4 ft. K 52 motor, that is the result of several years ofexperimental work by a leading electric company, is direct con-nected to the saw. These motors are designed for practically anyvoltage D. C. and for 60 cycle two and three phase alternatingcurrent in standard voltages. The carriage of the machine is arranged so that small beamsor other shapes can be cut at an angle. In doing this it isnecessary to clamp the work, but when straight cutsare being made no cla
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
