Teletype Model 37

<h2 id="features">Features</h2>
<p>The Model 37 came with many features including upper- and lowercase letters, reverse page feed for printing charts, red and black ink and could print 150 <a href="/facts/Baud/uCsmXrdT">Baud</a> (15 characters/second) and optional tape and punch reader. This made it 50% faster than its predecessor the <a href="/facts/Teletype_Model_33/n7zoAqxt">Model 33</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a>
</p><p>The Model 37 terminal utilizes a serial input / output 10 unit code signal consisting of a start bit, seven information bits, an even parity bit and a stop bit. It was produced in ASR (Automatic Send and Receive)also known as the Model 37/300, KSR (Keyboard Send and Receive) also known as the Model 37/200 and RO (Receive Only) also known as the Model 37/100.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a>
</p><p>The Model 37 handles all 128 ASCII code combinations.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> It uses a six-row removable typebox with provisions for 96 type pallet positions. When the Shift-Out feature is included, the six-row typebox is replaced with a seven-row typebox allowing 112 pallet positions, or it can be replaced with an eight-row typebox allowing 128 type pallet positions.
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<h2 id="technical-specifications">Technical specifications</h2>
<ul><li>The Model 37 RO and KSR are 36.25 inches high, 27.5 inches deep and 22.5 inches deep. The ASR is 36.25 inches high, 44.5 inches wide and 27.5 inches deep.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a></li>
<li>The ASR weighs approximately 340 pounds and KSR and RO weighs approximately 185 pounds.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a></li>
<li>The Model 37 interface meets the requirements of EIA RS-232-B and has a recommended maintenance interval of every six months or every 1500 hours.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a></li>
<li>Power Requirements - 115VAC ± 10%, 60 Hz ± .45 Hz, RO is approximately 200 Watts, KSR is approximately 300 Watts, ASR is approximately 550 Watts.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a></li></ul>
<h2 id="fun-facts">Fun Facts</h2>
<ul><li>Most Model 37s were re-purchased from customers and sold to the Soviet Union with antiquated mainframe computer systems.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a></li></ul>

<h2 id="further-reading">Further reading</h2>
<ul><li>Dolotta, T., A., & Dorn, William. (1970). Functional Specifications for Typewriter-Like Time-Sharing Terminals. ACM Computing Surveys, 2(1), 5-31.</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"Exhibits - Living Computer Museum". www.livingcomputermuseum.org. Retrieved 6 July 2016. <a href="http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx" target="_blank">http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>"Exhibits - Living Computer Museum". www.livingcomputermuseum.org. Retrieved 6 July 2016. <a href="http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx" target="_blank">http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>Teletype Model 37 Product Catalog (April 1969 ed.). Skokie, Illinois: Teletype Corporation. 1969. <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>Meet the Teletype Model 37. Skokie, Illinois: Teletype Corporation. 1968. <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
<li id="fn:5"><p>Teletype Model 37 Product Catalog (April 1969 ed.). Skokie, Illinois: Teletype Corporation. 1969. <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li>
<li id="fn:6"><p>Teletype Model 37 Terminals. Skokie, Illinois: Teletype Corporation. 1969. <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li>
<li id="fn:7"><p>Meet the Teletype Model 37. Skokie, Illinois: Teletype Corporation. 1968. <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li>
<li id="fn:8"><p>Teletype Model 37 Product Catalog (April 1969 ed.). Skokie, Illinois: Teletype Corporation. 1969. <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li>
<li id="fn:9"><p>"Exhibits - Living Computer Museum". www.livingcomputermuseum.org. Retrieved 6 July 2016. <a href="http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx" target="_blank">http://www.livingcomputermuseum.org/The-Collection/Exhibit-Hall.aspx</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li>
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Teletype Model 37 open-in-new

Teletype Model 37