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Altimeter with Kolsman window clarifier

  • US 7,313,962 B1
  • Filed: 12/05/2005
  • Issued: 01/01/2008
  • Est. Priority Date: 12/05/2005
  • Status: Expired due to Fees
First Claim
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1. An altimeter comprising:

  • a dial face having numbers from zero to 9 spaced at equal intervals around the circumference of the dial face;

    a Kolsman window in the dial face at the 3'"'"'oclock position;

    a barometric scale viewable through the Kolsman window;

    a Kolsman window adjuster for setting the barometric pressure in the Kolsman window;

    a transparent cover enclosing the dial face;

    and a plano-convex lens secured to the transparent cover over the Kolsman window;

    wherein the plano-convex lens is secured to the transparent cover with an adhesive; and

    wherein the adhesive is Norland Optical Adhesive Number 61.

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