TRADE CATALOGUES.
Holophane Reflectors for Gem, Meridian, Tantalum and Tungsten lamps are illustrated and described in Bulletin No. 6 from the Holophane Company of New York City.
Bulletin No. 21 from H. Krantz Mfg. Co., 160-166 Seventh St., Brooklyn, N. Y., illustrates and describes Standard and Water-Tight Boxes for all electrical installation purposes. This line includes floor, wall, ceiling, elevator, receptacle, switch, conduit and junction boxes, as well as boxes with plugs and receptacles for either wood, concrete or parquet floors or marine installations.
The General Electric Company, Schenectady, N. Y., in Bulletin No. 4,576, describes the Type F, Form K-3 line of oil switches for panel installation and remote control, on systems of 4,500 volts or less. The object of Bulletin No. 4,578 is to describe the essentials of the various standard controllers that are manufactured for railway service, with special reference to the operating conditions for which each type is suited. Among the controllers described are Type B, which include the necessary contacts and connections for electric braking, Type K for series parallel operation of the motors, Type L, also in the series parallel class, but which completely open the power circuit when changing from series to parallel; Type R, which are designed to control the motor speeds by means of resistance only, and a brief outline of the Sprague-General Electric Type M control system. The General Electric CQ motor is described in detail in a 16-page bulletin. This motor is for direct-current circuits, and is made up to 20-horsepower in size, and for voltages, of 115, 230 and 550. The application of the motor to linotype equipments, ventilating outfits, machine tools, etc., is also outlined. The extensive tables of dimensions, capacities, etc., in the bulletin, will be found very useful in preparing specifications.