. American engineer and railroad journal . adapts theapparatus tor distant control, bui it enables the operator touse the same handle, ratchel and Indicator dial which are furDished with the controller; ihis saves the expense ol makinga new handle and ratchet, as is necessary In some ca Tho notches In th< ratchel are pc Itive, and the designBuch that as each step i reached a key drops into a notch andstops the handle, holding it firmly in place until released by alire upon the thumb Btop in the end of the handle. Theoperator is thus able to watch his work uninterruptedly whileapplying power
. American engineer and railroad journal . adapts theapparatus tor distant control, bui it enables the operator touse the same handle, ratchel and Indicator dial which are furDished with the controller; ihis saves the expense ol makinga new handle and ratchet, as is necessary In some ca Tho notches In th< ratchel are pc Itive, and the designBuch that as each step i reached a key drops into a notch andstops the handle, holding it firmly in place until released by alire upon the thumb Btop in the end of the handle. Theoperator is thus able to watch his work uninterruptedly whileapplying power or changing the speed—a tacl of distinct all-vantage. The handle and ratchet are simple in conBtruiand each step is plainly Indicated and numbered In the type V controller the starting resistance is Insertedwhen the first contact is made, being cul OUl when the handleis moved to the second position. In the type W a cam liftsfrom the contact the linger whose function Is to cut out theStarting resistance, and thus leaves the n In circuit. I VCI \ i UN rROLLER n n. w cos raoiXER. CONTROLLERS TOR MAilllM TOOLS. variations is the best possible for general use, and affords allthe differences in speed which are required in service. The type V controllers are ordinarily adopted when a speedvariation of 2 to 1 is required, and the type W for variationsof I to 1. although other variations may lie obtained as de-sired, each installation being separately considered and thecontroller used which is best adapted to the motor with whichit is to be used. The successive intermediate speeds are ar-ranged in practically geometrical progression, but extra leadsare provided by the use of which the owner may make suchchanges as he desires. In general si nut ure. these controllers arc based upon themost modern and improved types of controller design, insuringreliability and long life, regardless of hard usage. The drumis made of metal and secured to an insulated shaft. The con-tact strips and the f
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
