|
The Teletype Model 28 is a product line of page printers, typing and non-typing tape perforator and tape reperforators, fixed head single contact and pivoted head multi-contact transmitter-distributors, and receiving selector equipment. Regarded as the most rugged machines Teletype Corporation built, this line of teleprinters used an exchangeable type box for printing and sequential selector "Stunt Box" to mechanically initiate non-printing functions within the typing unit of the page printer, electrically control functions within the page printer and electrically control external equipment. The Teletype Model 28 is more rugged and more expensive than later Teletype Model 32 machines. The Teletype Corporation introduced the Model 28 as a commercial product in 1953 after being originally designed for the United States military. There are three versions of the Model 28 page printer: * the Model 28 ASR, (Automatic Send and Receive), which has a built in 5-level paper tape reader and tape perforator; * the Model 28 KSR (Keyboard Send and Receive), which lacks the paper tape reader and punch; * the Model 28 RO (Receive Only) which has neither a keyboard nor a paper tape reader/punch. ==History== Teletype Corporation's Model 28 line of communications terminals was first delivered to the US Military in 1951〔 and commercially introduced in 1953. This series of teleprinters and associated equipment was popular in the various branches of the United States Armed Forces, and commercially in the financial and manufacturing industries. Teletype machines were gradually replaced in new installations by dot-matrix printers and CRT-based terminals in the mid to late 1970s. Basic CRT-based terminals which could only print lines and scroll them are often called glass teletypes to distinguish them from more sophisticated devices. Teletype Corporation discontinued Model 28 production in 1981. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Teletype Model 28」の詳細全文を読む スポンサード リンク
|