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