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

• Current Assignee: George J O'Neil
• Original Assignee: George J O'Neil
• Inventors: O'Neil, George J.
• Primary Examiner(s): Allen; Andre J.
• Application Number:
  US11/294,619
• Time in Patent Office: 757 Days
• Field of Search: 733/84
• US Class Current: 73/700
• CPC Class Codes: G01C 5/06 by using barometric means
• CPC Class Codes: G01D 11/26 Windows; Cover glasses; Sealings therefor
• CPC Class Codes: G01L 19/16 Dials; Mounting of dials

Abstract

An altimeter having a magnifying element configured to magnify a barometric scale for use in setting the altimeter to a local barometric pressure. The magnifying element can be a plano-convex lens positioned on a transparent cover of the altimeter over the barometric scale. The lens can be adhered to the transparent cover with an adhesive or can be formed as part of the transparent cover. In one embodiment, the magnifying element is included as part of a cover that can be secured to an altimeter.

Claims

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.