Document oRd714yr0a1XzVbMEQGeQBrw

MILLIONS for the NAVY Plenty, Too, for Industry Spirdwound Uncle Sam's Navy is a critical buyer and a tough proving ground for any product. GASKETS If they're good enough for the Navy, you can be sure AJAX Spiralwound Gaskets are the Gaskets you want. Get the Gaskets with built-in resilience for safer seals with lighter bolt-loads. The Gaskets that "breathe" with varying pressures and temperatures to keep joints tight under all operating conditions. Tie thrifty Gaskets that can be reused because they don't lose their resiliency under compression. Types for all standard flanges and for stationary and marine boilers and accessories. Made of plated low-carbon steel or stainless with fillers of Canadian or Blue African Asbestos. Industrial Distributors stock them for your convenience. Ask yours or write-- UNITED STATES GASKET FABRICATORS OF ' TfFlOr 8 KEI F" FOR THE CHEMICAL PROCESS & ELECTRONIC INDUSTRIES CAMDEN T NEW JERSEY Represents live* in Principal Cities Throughout the World 212 Mere TECHNICAL BRIEFS .Begins on page ISf&i power supply are presented. Probably,*;-- the greatest advantage of a packaged?!* adjustable-voltage drive is that all equipment required to supply the^r' adjustable voltage is mounted single, ventilated enclosure, The ac. drive motor, starter, start-stop pushbut ton, dc generator and control panel ate? mounted in the enclosure complete withfe connections. Thus, the user need only? wire the unit to the ac supply and make$l the connections to the dc motor and': control station. Simplicity of installation of the pack-v age unit makes it well suited for spot*, conversion. When laying out a newy plant the ac wiring need be the only;. electrical consideration. If a machine " is installed requiring a dc supply, a".- packaged adjustable-voltage drive may'" be specified and the dc supply along T with the required control is obtained in .1 a single unit. A packaged adjustable-V voltage motor-generator set can also be ' used for constant-voltage supply to pro-. - vide additional capacity for an existing dc system or to provide the only dc.-. source in a small plant. ..r. A packaged adjustable-voltage drive is well suited for applications requiring : a wide range of operating-speeds non--" trolled by the operator. It can provide close speed control, smooth acceleration . and deceleration and rapid stops by - dynamic or regenerative braking. Package drives are not limited to ob taining adjustable speed. Many control functions may be built into them while . proving all their other advantages. If t auxiliary control is required it can be supplied on the panel with the rest of - the control. This makes it possible to complete the connection for the entire unit and eliminates the need for extra control panels and enclosures. AIEE ' conference paper. Can be obtained - from the author. ' ~~ . Directions for ordering papers on p 154 I The Electronic Packaged Drive. By E F Kubler. Gcio-ral Electric Co. Schenec tady. ;Y. Y. Electronic adjustable-speed motor - controls have proved themselves in bun- dreds of industrial applications. Because of the ever widening demand for pre* cise control of reasonable cost, standard electronic package drives are available in a range from fractional to over 30 hp. These small compact drive- are used on office machinery, machine tools, au- . tomatic display stands and many other application*. Electronic .drive? have the following advantages. I. Compactnes- and light weight make it*m suitable for most applications. . power JUNE 1953 f