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:
Oct. 05, 1976
Filed:
May. 02, 1975
James V Drexler, St. Paul, MN (US);
Alan D Kaske, Minneapolis, MN (US);
Kenneth L Pearson, Burnsville, MN (US);
Sperry Rand Corporation, New York, NY (US);
Abstract
A time of event recorder in which a Gray Code counter is regularly advanced at a predetermined frequency by a crystal controlled oscillator and the outputs from the counter stages are applied to the digit lines of a MATED FILM memory array, such that when an event associated with a given word line of the memory occurs, the counter contents at the time of occurrence of the event are stored in that memory word register. A second array of MATED FILM elements is also provided which has its digit lines energized at a fixed submultiple of the frequency of the crystal controlled oscillator to provide greater accuracy and resolution than is obtainable from the Gray Code counter. The elapsed time between two events may be obtained by reading out two words from the memory and determining the difference in counts associated with the two events under consideration.