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Cassette PTC semiconductor heating apparatus

  • US 5,377,298 A
  • Filed: 04/21/1993
  • Issued: 12/27/1994
  • Est. Priority Date: 04/21/1993
  • Status: Expired due to Fees
First Claim
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1. A PTC semiconductor heating apparatus comprising:

  • a first half shell and a second half shell each half shell having a base socket recessed therein and both shells combinable for forming a housing;

    a plurality of linear arrays of PTC semiconductor heating elements parallelly embedded in said base sockets in said housing with each said linear array of PTC semiconductor heating elements containing a plurality of PTC semiconductor heating elements longitudinally disposed in a side-by-side linear arrangement in said base sockets of said housing, each said linear array of PTC semiconductor heating elements sandwiched in between two neighbouring thermally and electrically conducting units longitudinally juxtapositionally mounted in the housing;

    two said thermally and electrically conducting units disposed on two opposite sides of each said linear array of said PTC semiconductor heating elements electrically connected to two poles of a power source; and

    a plurality of resilient embedding plates each said embedding plate inserted in between every two neighbouring thermally and electrically conducting units for firmly squeezing, packing and retaining said conducting units and said PTC semiconductor heating elements in said housing without welding and bonding joining.

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