Editing Teleprinter (section)

===Teletype Corporation===
{{main|Teletype Corporation}}
[[File:ASR-33 at CHM.agr.jpg|thumb|A [[Teletype Model 33]] ASR teleprinter, with [[punched tape]] reader and punch, usable as a [[computer terminal]]]]
The '''Teletype Corporation''', a part of [[AT&T Corporation|American Telephone and Telegraph Company]]'s [[Western Electric]] manufacturing arm since 1930, was founded in 1906 as the Morkrum Company. In 1925, a merger between Morkrum and Kleinschmidt Electric Company created the Morkrum-Kleinschmidt Company. The name was changed in December 1928 to Teletype Corporation. In 1930, Teletype Corporation was purchased by the [[American Telephone and Telegraph Company]] and became a subsidiary of [[Western Electric]]. In 1984, the divestiture of the Bell System resulted in the Teletype name and logo being replaced by the AT&T name and logo, eventually resulting in the brand being extinguished.<ref>{{cite web |url=http://www.kekatos.com/teletype/ |archive-url=https://web.archive.org/web/20080603235022/http://www.kekatos.com/teletype/ |title=History of The Teletype Corporation |access-date=March 3, 2010 |archive-date=June 3, 2008 |date=June 24, 2003 |url-status=dead}}</ref> The last vestiges of what had been the Teletype Corporation ceased in 1990, bringing to a close the dedicated teleprinter business. Despite its long-lasting trademark status, the word ''Teletype'' went into common generic usage in the news and telecommunications industries. Records of the United States Patent and Trademark Office indicate the trademark has expired and is considered dead.<ref>{{cite web |url=https://tmsearch.uspto.gov/bin/showfield?f=doc&state=4805:5200jd.2.9 |title=US trademark database |website=uspto.gov}}</ref>

Teletype machines tended to be large, heavy, and extremely robust, capable of running non-stop for months at a time if properly lubricated.<ref>{{cite book |url=http://www.bitsavers.org/pdf/teletype/138_Model15_Adj_Oct41.pdf |archive-url=https://web.archive.org/web/20110111174700/http://www.bitsavers.org/pdf/teletype/138_Model15_Adj_Oct41.pdf |archive-date=January 11, 2011 |url-status=dead |title=Adjustments, Type Bar Page Printer, (Model 15) |year=1941 |publisher=Teletype Corporation |location=Chicago}}</ref> The Model 15 stands out as one of a few machines that remained in production for many years. It was introduced in 1930 and remained in production until 1963, a total of 33 years of continuous production. Very few complex machines can match that record. The production run was stretched somewhat by World War II—the Model 28 was scheduled to replace the Model 15 in the mid-1940s, but Teletype built so many factories to produce the Model 15 during World War II, it was more economical to continue mass production of the Model 15. The Model 15, in its receive only, no keyboard, version was the classic "news Teletype" for decades.
* Model 15 = Baudot version, 45 Baud; optional tape punch and reader
* [[Teletype Model 28|Model 28]] = Baudot version, 45-50-56-75 Baud; optional tape punch and reader
* Model 32 = small lightweight machine (cheap production) 45-50-56-75 Baud; optional tape punch and reader
* [[Teletype Model 33|Model 33]] = same as Model 32 but for 8 level ASCII-plus-parity-bit, 72 char./line, used as computer terminal; optional tape punch and reader.<ref>{{Cite web |url=https://www.pdp8online.com/asr33/asr33.shtml |title=ASR 33 Teletype Information |website=www.pdp8online.com}}</ref>
* Model 35 = same as Model 28 but for 8 level ASCII-plus-parity-bit, used as heavy-duty computer terminal; optional tape punch and reader
* Model 37 = improved version of the Model 35, higher speeds up to 150 Baud; optional tape punch and reader
* Model 38 = similar to Model 33, but for 132 char./line paper (14 inches wide), upper and lower case, and red/black printing; optional tape punch and reader
* Model 40 = new system processor based, w/ monitor screen, but mechanical "chain printer"
* Model 42 = new cheap production Baudot machine to replace Model 28 and Model 32, paper tape acc.
* Model 43 = same but for 8 level ASCII-plus-parity-bit, to replace Model 33 and Model 35, paper tape acc.

Several different high-speed printers like the "Ink-tronic" etc.