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Home > Art, Film & Photography > Electrical Engineering Volume 49; A Monthly Journal for All Interested in the Practical Application of Electricity
Electrical Engineering Volume 49; A Monthly Journal for All Interested in the Practical Application of Electricity

Electrical Engineering Volume 49; A Monthly Journal for All Interested in the Practical Application of Electricity


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ... A high starting torque is developed, the motor picks up to full speed under heavy and increasing loads, and a smooth acceleration of the driven machine is obtained, as well as overload protection for the starting winding. Centrifugal weights are used to operate the clutch as before, but instead of the weights themselves pressing against a drum, the friction between alternate plates of steel and phosphor bronze is used in locking the rotor to the shaft. W Multiple Disc Clutch An idea of the method of operation can be obtained from reference to Fig. 1. The weights are shown at W and fly out when a predetermined speed is reached. This compresses the plates through the toggle links K, which force down the pressure disc D against the alternate disc shown at B and C. The weights are normally pulled toward the shaft by springs which are omitted in the figure to prevent complication of the drawing. The rotor spider Q carries the phosphor bronze plates upon the studs F, while the steel plates have square holes in the center which fit upon the square portion of the shaft shown at G. Thus one set of plates must turn with the rotor, while the other set must turn with the shaft. The weights and springs are so adjuster on both the clutch and the switch, used to open the starting winding, that when the motor is operating, the switch must open before the clutch starts the shaft. When the motor is retarded by an overload the clutch will slip before the starting winding circuit can be closed. This gives absolute protection against burnout to the starting winding. Single phase induction motors using the split phase method of starting require a switch to cut out the starting winding. This switch is always arranged to operate by centrifugal force just before the motor reaches ...


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Product Details
  • ISBN-13: 9781232352594
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 242
  • Spine Width: 13 mm
  • Width: 189 mm
  • ISBN-10: 1232352594
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 440 gr


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Electrical Engineering Volume 49; A Monthly Journal for All Interested in the Practical Application of Electricity
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