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. 03, 1981
Filed:
Jan. 05, 1979
Applicant:
Inventors:
Abe Shunichi, Hachioji, JP;
Mistuo Akiyama, Hachioji, JP;
Assignee:
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 340644 ; 355 / ;
Abstract
A level shift circuit for indicating the open or closed condition of an access door of a copier senses the powered condition of operating portions of the copier to which the supply of power is interrupted when the access door is open and provides a corresponding logic signal to a sequence control circuit of the copier. In the disclosed embodiment, a series-connected resistor and zener diode are connected to the copier operating portions to provide an output signal through an inverting buffer to the sequence control circuit.