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:
Feb. 08, 1983
Filed:
Aug. 06, 1979
Applicant:
Inventor:
Wayne R Herbst, Northbrook, IL (US);
Assignee:
Teletype Corporation, Skokie, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06K / ; G08C / ;
U.S. Cl.
CPC ...
178 / ; 235455 ; 3401 / ;
Abstract
A photoelectric circuit for reading punched data tape wherein the circuit compensates for variations in phototransistors and light emitting diodes, dust accumulation and degradation of the light emitting diodes by comparing the light transmitted through a punched section of the tape to the light transmitted through a solid section of the tape.