Analysis Of Swiss ETK Teletypewriter

Item

Title
Analysis Of Swiss ETK Teletypewriter
Date
1952
Index Abstract
Coming Soon
Photo Quality
Undetermined
Report Number
WADC TR 52-266
Creator
Seymor, C. P.
Rosenberg, L. B.
Corporate Author
Wright Air Development Center
Extent
35
PB Number
PB128602
NTRL Accession Number
AD015850
Identifier
AD0015850
AD Number
15850
Access Rights
Unknown
Distribution Classification
1
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
AFAL ltr
Distribution Change Action Date
9/16/2002
Distribution Conflict
Fix
Abstract
An elemental printing technique for error indication in teletypewriter systems was devised by the Dr. Edgar Gretener A. G. of Zurich in which a character consists of a combination of marking bits. Each bit is the result of a finite electrical signal. The machine operated on the asynchronous start-stop principle and utilized a conventional electromechanical printing control system. The character was formed by printing a combination of 14 sign elements, of which a maximum of 5 impressions were required to print any complete character. The rotational torque impressed on the type wheel and another component element was supplied by a 12-v governed motor. A primary power supply of either 110 or 245 vac, or 12 vdc can be used. The equipment may be used with land lines or in conjunction with a radio-telephone circuit, since the output is in the form of an audio tone. The sequence of operation, the functioning of parts, and the operation of a line unit are described in detail.
Report Availability
Not available via Contrails
Date Issued
1952-09
Index In
DTIC
Type
report

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