. Railway mechanical engineer . speed gear box, or a motormounted on top of the gear box. Provision is also made fora four-step cone pulley drive in place of the guar box, ifdesired. The handle for operating the starting and stoppingclutch of a gear box driven planer also operates a brake for stopping the table when the clutch is thrown out. All gearsand revolving parts are thoroughly guarded by sheet metal3 or wire netting as 24yi in. long can be machined on this planer, theheight to cross rail and distance between housings being25 in. Ten, 17, 29 and 48 strokes per minute ca
. Railway mechanical engineer . speed gear box, or a motormounted on top of the gear box. Provision is also made fora four-step cone pulley drive in place of the guar box, ifdesired. The handle for operating the starting and stoppingclutch of a gear box driven planer also operates a brake for stopping the table when the clutch is thrown out. All gearsand revolving parts are thoroughly guarded by sheet metal3 or wire netting as 24yi in. long can be machined on this planer, theheight to cross rail and distance between housings being25 in. Ten, 17, 29 and 48 strokes per minute can be ob-tained and the ratio of return to cutting speed is to S-hp. motor is required to furnish driving power. Milling Machine With Rectangular Overarm THE Rockford Milling Machine Company, Rockford,111., has combined the advantages of previous machinesin a No. 3 high power, all geared miller with severalnew features. The overarm is rectangular in shape, beingactuated by a rack and pinion; the speed drive to the saddle. Rockford No. 3 Willing Machine with Rectangular Overarm and NewTable Feed Mechanism and table mechanism has been redesigned to eliminate thetelescopic feed shaft and universal joints; and feed and quickreturn have been combined under a single control. In the newmachine, feeds are changed by means of sliding gears insteadof the tumbling gear previously used. Constant speed drive is secured by means of a running at 320 , arrangement being made forreversing the main spindle drive. Three levers manipulateall speed variations which are 16 in number varying ingeometrical progression from 16 to 422 Twelve feedsare furnished, the range being from 1}4 to 16 in. per this case also three levers are used to obtain the feedchanges which are plainly indicated on the feed plate. The overhanging arm is a rectangular cast iron sectiony2 by 9l/i in. It is clamped to the column by means of twosecurely locked eccentrics. When changing cutters
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
