. Railway mechanical engineer . an oi)ening justbelow the cone of the condenser, a small amount of coldwater being allowed to fall just in front of the air outlet,thus cooling these gases to their smallest volume. In con-nection with these condensers, a turbo-air pump or a three-stage steam jet air pump is usually recommended. AUTOMATIC ARC WELDING MACHINE Automatic arc welding is accomplished by a device, re-cently placed on the market by the General Electric Com-pany, Schenectady, N. Y. The welder is for use with theregular welding .set, and is designed to take the place of ahand controlled
. Railway mechanical engineer . an oi)ening justbelow the cone of the condenser, a small amount of coldwater being allowed to fall just in front of the air outlet,thus cooling these gases to their smallest volume. In con-nection with these condensers, a turbo-air pump or a three-stage steam jet air pump is usually recommended. AUTOMATIC ARC WELDING MACHINE Automatic arc welding is accomplished by a device, re-cently placed on the market by the General Electric Com-pany, Schenectady, N. Y. The welder is for use with theregular welding .set, and is designed to take the place of ahand controlled electrode. It consists of a pair of rollerscalled feed rolls, driven by a small direct current motor,which draw in and deliver to the arc a steady supply ofwire, maintaining automatically the best working machine is controlled from a small panel. The welding head is held by a suitable support with acertain amount of hand-regulated adjustments and consistsof a steel body, carrying feed rolls and straightening Increasing the Diameter of a 14-in. Shaft ^a In. both of wliidi are adjustable for various sizes of wire. Thearm is supjjorted on a gear i)ox, together with the i)ox contains gears which give three gear ratios, thusextending the range of the device while allowing the motorto operate at its most favorable .speed. The control jjanel carries an ammeter and voltmeter forthe welding circuit as well as rheostats, a control relay, andthe contactors and switches for tlie feed motor. It is pos-sible lo start and sto]) the ei|uipment from the work by apendent ])ush button, but adjustment of the sjieed conditionsmust be made from the panel. The adjustment for arc conditions l)y regulation of thespeed of the feed motor as the arc voltage varies is takencare of by the panel equijjment. The result is a steady arcand more uniform and faster work than is possible with ahand-controlled arc. The whole apparatus is mounted on a base which can bebolted to any fo
Size: 1697px × 1473px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
