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Rotary frequency-changer

  • US 4,035,711 A
  • Filed: 07/21/1975
  • Issued: 07/12/1977
  • Est. Priority Date: 07/26/1974
  • Status: Expired due to Term
First Claim
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1. Apparatus for producing ventilation and soundproofing for a frequency-changer, comprising a housing having a first chamber and a second chamber separated from said first chamber by an insulated wall, a rotary frequency converter mounted in said first chamber and having a rotatable shaft on which a fan rotor is mounted for rotation therewith, said fan directing a flow of air through said converter in a first direction, an air passage formed in said insulated separating wall and providing communication between the converter and second chamber wherein air directed through said converter is forced through said air passage and into said second chamber for movement therethrough in a second direction that is opposite to movement of the air through said converter in said first direction, means for controlling operation of said converter located in at least one of said compartments for exposure to the circulating air, and baffles located in said second chamber adjacent to the ends thereof and extending in a direction that is perpendicular to the longitudinal axis thereof, said baffles cooperating with the adjacent walls of said second chamber to define air passages therebetween through which the air is directed.

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