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Royalton natural air movement system

  • US 5,653,905 A
  • Filed: 02/16/1995
  • Issued: 08/05/1997
  • Est. Priority Date: 02/16/1995
  • Status: Expired due to Fees
First Claim
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1. A holding oven having a chamber, a heater means for the chamber and an energy source for the heater means, comprising:

  • a heat sink comprising a first material characterized by a high thermal capacity, the first material comprising stainless steel, and a heat conductor comprising a second material characterized by a high thermal conductivity, the second material comprising aluminum, the heater means contacting the first material and further in contact with the second material;

    further comprising a heater mounting damp associated with the oven;

    wherein the clamp comprises a mounting plate with brackets dimensioned to receive the heater means, adapted to secure the heater means against the heat conductor and prevent the heater means from bowing away from the conductor;

    wherein the heater means and the associated mounting plate with brackets form a heat conductor;

    the heat sink is controlled by a thermostat supplied by an energy source;

    the heater means is a Nichrome wire;

    wherein the first and second materials have a specific heat, and the specific heat of the second material is in a range from 1.95 to 2 times specific heat of the first material at temperatures from 20°

    C. to 200°

    C.;

    wherein said first and second materials have a conductivity, and the conductivity of the second material is in a range from 4.4 to 4.6 times conductivity of the first material at temperatures from 18°

    C. to 200°

    C.;

    wherein said first and second materials have a mass and thermal capacitance, and the mass of the first material is more than 2 times the mass of the second material, and wherein the thermal capacitance of the first material is more than two times the thermal capacitance of the second material;

    further comprising a means for creating a natural convection current within the cabinet;

    wherein said means for creating a natural convection current comprises the aluminum conductor, constructed of opposed L-shaped pieces, each of the L-shaped pieces having an upright leg and a contiguous foot portion, with the heater means affixed to the cabinet under the juncture of the foot and the leg of each L piece, and the leg of each L-shaped piece draws heat up the sidewall of the conductor and away from the central floor portion of the cabinet, to create a convection heat flow within the cabinet.

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