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:
Sep. 13, 1977
Filed:
Dec. 22, 1975
Kurt E Knuth, Mount Prospect, IL (US);
Teletype Corporation, Skokie, IL (US);
Abstract
A facsimile transmission system is described which includes a transmitter section having an optical sensor driven across a selected document by a variable speed motor controlled by the frequency of an oscillator. The relative movement of the sensor with respect to the document is indicated by a pulse generator which clocks the output of the sensor into a storage memory. The stored data is clocked from the storage memory by the oscillator output and fed, along with the oscillator signal, to a diphase modulator. At a receiver section, the diphase signal is demodulated providing data and clock signals. The data signal is placed into a receiver storage memory. The clock frequency is used to control the speed of a recorder motor driving a recorder. A pulse generator is coupled to the recording device and generates recorder location pulses which are used to clock the data from the memory.