. Electric railway journal . Chicago Railways Shops—Blacksmith Shop band-wire troubles. A Century field tester is used in this shopand is said to give excellent results. A reheating fixture is used for setting new insulation in re-constructed controller speed rolls. Auxiliary contacts are being applied to all of the K-28 con-trollers used by this company. These are inclosed in ironhoods fastened to the back side of the controller cases andmechanically connected with the speed rolls. The contactscontrol the operation of independent contactors placed under-neath the car bodies so connected as to
. Electric railway journal . Chicago Railways Shops—Blacksmith Shop band-wire troubles. A Century field tester is used in this shopand is said to give excellent results. A reheating fixture is used for setting new insulation in re-constructed controller speed rolls. Auxiliary contacts are being applied to all of the K-28 con-trollers used by this company. These are inclosed in ironhoods fastened to the back side of the controller cases andmechanically connected with the speed rolls. The contactscontrol the operation of independent contactors placed under-neath the car bodies so connected as to break the arc on thefirst controller notch and at the transition Chicago Railways Shops—Foundry A special table with disappearing winding pins operated bya foot treadle has been built for rewinding strip-iron resistance. Electrical heater coils are rewound on an attachment to thefield-coil winding lathe. A chuck speeded to about 1500 a J^-in. steel rod which is 9 ft. long, and around whichthe heater wires are wound. To wind the coils automaticallyand smoothly a specially devised clamp for guiding the wire onto the revolving rod has been made. This clamp is madeof two pieces of J^-in. fiber about 3 in. x6 in. in size. Thesepieces are hinged at the bottom, where a rod carrying a is attached. The hinged fiber pieces clamp over therevolving rod and have a thread groove cut in the openingbetween them. In winding a coil the wire is first given twoor three turns about the rod and then the fiber clamp isscrewed snugly in place about these few turns. Then, as therod revolves, the coil adjusts itself to the thread grooves inthe fib
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