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:
Nov. 15, 1977
Filed:
Nov. 17, 1975
Tsukumo Nobusawa, Oizumi, JA;
Abstract
This invention provides apparatus for producing a command signal used to control the closing of a camera shutter. Before the shutter opens, a photo-responsive portion of the apparatus generates a number of serially occurring data pulses. After the shutter opens, a timing pulse generator portion produces a number of serially occurring timing pulses. A memory portion, including a plurality of registers, accumulates a decimal count of the serially occurring data pulses with each register storing a respective one of unit and higher decimal place portions of the decimal count. The memory forms part of a comparison circuit arrangement which responds to the data pulses and the timing pulses to produce the command signal.