. Railway mechanical engineer . tomaticposition, which allows it to float during the test and avoidsstrain on its parts. An automatic valve should be tested automatically. By April, 1921 RAILWAY MECHANICAL ENGINEER 259 means of the automatic testing feature of this valve, it ispossible to exhaust the steam between the dash pots at anytime and determine whether the valve will close or not. TheGolden-Anderson automatic valves are made in different sizes and several different patterns, including the angle pat-tern, globe pattern, vertical discharge elbow pattern, down-ward discharge elbow pattern
. Railway mechanical engineer . tomaticposition, which allows it to float during the test and avoidsstrain on its parts. An automatic valve should be tested automatically. By April, 1921 RAILWAY MECHANICAL ENGINEER 259 means of the automatic testing feature of this valve, it ispossible to exhaust the steam between the dash pots at anytime and determine whether the valve will close or not. TheGolden-Anderson automatic valves are made in different sizes and several different patterns, including the angle pat-tern, globe pattern, vertical discharge elbow pattern, down-ward discharge elbow pattern, cross pattern, globe patternfor use where head room is limited, and others. Cone Drive Plain Milling Machine ANEW No. 4 plain milling machine with cone typedrive has been developed recently by the Ford-SmithMachine Company, Ltd., Hamilton, Canada. As inthe usual milling machine construction, special attention hasbeen given to locating control handles for all movements ofthe knee and table within easy reach of the operator. In. Ford-Smith No. 4 Plain Miller Equipped With Cone Drive addition, rapid power traverse in all directions is secured, to-gether with safety clips. An exceptional feed range, vary-ing from .006 in. to in. per revolution of the spindle, isprovided. Rigidity of the knee is secured by eliminatingholes in either the top or sides. A narrow guide is providedfor the saddle on the knee. As shown in the illustration, afeed dial at the operators hand indicates all feeds. Power feeds and automatic trips are arranged in all directions. Special attention is called to the positive locking of thearbor supports on the overarm and of the overarm in thecolumn. The column is of box section construction withheavy walls and bars for supporting the knee and adjustments by means of graduated collars read-ing to 1/1000 in. are provided for the table screw, cross screwand elevating screw. The table is unusually stiff with widebearings and great depth. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
