The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 1976
Filed:
Oct. 28, 1975
Applicant:
Inventor:
Frank Patterson Smith, 2nd, Dresher, PA (US);
Assignee:
Narco Scientific Industries, Inc., Fort Washington, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G06G / ;
U.S. Cl.
CPC ...
244183 ; 23515132 ; 343 / ; 3431 / ;
Abstract
In a DME system, the least significant decade of the present aircraft to ground station distance is maintained encoded in a memory, and an up-down counter maintains a variable count. The complement of the present distance is compared with the present count, and when a difference is detected, a logical pulse increments the counter and also indicates passage of the aircraft through another distance interval. The sense of the difference between the present distance and the count also is monitored, responsive to which the direction of the count is controlled.