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Topic: Teleprinter

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	Teleprinter encryption
		Soon after the first teleprinters were put into operation, equipment for the encryption of teleprinter signals was constructed.
		The teleprinter could be directly connected to the cipher equipment, hence it was possible to transmit and receive in ``real time'', so saving a lot of time.
		In the crypto department this encryption method, consisting of adding a key character to a plaintext character, irrespective of how the key character was generated, was called ``overlaying''.
	frode.home.cern.ch /frode/ulfving/node6.html (327 words)

	Teleprinter Summary
		Because Telex I teleprinters use the Baudot code and Telex II (TWX) teleprinters use the ASCII code, and transmit at different speeds, exchange of messages between the two systems is somewhat delayed while a processing computer does the necessary conversions.
		A predecessor to the teleprinter, the stock ticker machine, was used as early as the 1870s as a method of displaying text transmitted over wires.
		A global teleprinter network, called the Telex network, was established in the 1920s, and was used through most of the 20th century for business communications.
	www.bookrags.com /Teleprinter (2167 words)

	G8TGL RTTY TERMINAL UNIT by SM0VPO (Site not responding. Last check: 2007-10-06)
		A normal teleprinter coil requires 80/80 volts to energise the coil, but this is connected in series with a 2.7K resistor to give a sort of constant current.
		The teleprinter coil never has more than 20 volts accross it, so we can use semiconductors to limit the current with a supply voltage of less than 30 volts.
		To align, short the teleprinter keyboard input terminals and adjust the RIGHT-HAND 4K7 pot for an output frequency of 1275 Hz.
	web.telia.com /~u85920178/use/g8tgl-tu.htm (553 words)

	ITT Creed Model 444 teleprinter
		The teleprinter motor is started again when a space element is received from line, or when the ‘letters’ key on the local keyboard is operated.
		The receiving margin of the teleprinter with single-current operation is substantially the same as that with double-current operation and is independent of the line resistance.
		Electrical connection to the teleprinter is by means of two flexible cables which plug into sockets located on the teleprinter 50-way plug box.
	www.rtty.com /England/creed444.html (6676 words)

	The First Teleprinters
		By 1914, teleprinters were being used by the Associated Press to deliver copy to newspaper offices throughout America, and by the early 1920s they were in general use around the world.
		Stibitz then proceeded to astound the attendees by allowing them to pose problems which were entered on the teleprinter; within a minute, the teleprinter printed the answers generated by the computer.
		of the teleprinter in the computing industry were numbered; they were eventually supplanted by the combination of computer keyboards and video displays, and the sound of teleprinters chuntering away in the back of computer rooms is now little more than a nostalgic memory.
	www.maxmon.com /1902ad.htm (565 words)

	The hiker who cracked the codes - smh.com.au
		The messages were typed into a Lorenz SZ40 teleprinter to be immediately enciphered and sent over the ether to another machine which automatically deciphered them and printed them out as plain text.
		The teleprinter's transmission system used the standard Baudot five-bit teleprinter system, a binary code in which each letter is made up of a series of five elements, or "bits".
		This consisted of either a "mark", the equivalent of the binary 1 and denoted by a cross, or a "space", the counterpart of the binary 0 and represented by a dot.
	www.smh.com.au /articles/2002/05/23/1022038456224.html (902 words)

	Telex Telecommunications Network Basic Frequently Asked Questions
		The telex equipment started with mechanical teleprinters, now the latest teleprinters are built around a microprocessor, disc drive, keyboard, VDU, printer together with word processor software to enable the operator to prepare, edit and store messages for later onward transmission.
		It worked using a single-tone voice frequency carrier signal of 1500 cps which was keyed on and off by the teleprinter keyboard, a tone for a space element and no-tone for marking and idle periods.
		Within a short space of time, the number of teleprinter subscribers increased to such an extent that it was more advantageous and economical to have an independent telegraph network both national and international.
	home.iprimus.com.au /oseagram/telex1.html (2458 words)

	Cryptographic Equipment
		Though several different types of on-line cryptoequipments are in use throughout the naval communications system, they are all designed to perform the same basic function: to encipher and decipher teleprinter or digital data signals.
		At the receiving station, the composite signal (tone package) is demultiplexed (separated) into individual signals and distributed to separate teleprinters, as required.
		At the receiving end, two or four corresponding converters may be used; the converter having the stronger signal input automatically provides the signal to be used by the receiving teleprinter.
	www.tpub.com /inch/7.htm (1095 words)

	TELEPRINTERS FOR THE RADIO AMATEUR
		There are many different types of mechanical teleprinter which become available on the surplus market from time to time, but we will only concern ourselves with the ones which are most liable to be encountered.
		The receiving section of a teleprinter usually consists of a form of electro-mechanical relay, often called the electro-magnet, with a fairly high inductance, perhaps up to 4 Henrys, and a low DC resistance, perhaps only 200 Ohms, which responds to the incoming signalling impulses.
		Normally applied to the model 7 teleprinter to indicate that the machine has been modified for the Telex service, and that it is fitted with motor on-speed contacts, an improved answer back unit, and a 33 way signals plug.
	www.rtty.com /England/creed1.html (7022 words)

	teleprinter - OneLook Dictionary Search
		teleprinter : The American Heritage® Dictionary of the English Language [home, info]
		Teleprinter : English-Chinese Dictionary of Graphic Communications (Big 5) [home, info]
		Words similar to teleprinter: teletypewriter, telex, teletype machine, telex machine, more...
	www.onelook.com /?w=teleprinter (168 words)

	Sample Contracts - Services Agreement - Healtheon Corp. and SmithKline Beecham Clinical Laboratories Inc. - Competitive ...
		Because the per teleprinter [] fee used in the first Year of this Agreement is based on [] for teleprinters during the Baseline Period, after the end of Year One there will be []; and the [] fee used in Years Two through Year Five are reset at the end of Year One.
		Subject to Section 4.2, except in the case of a [] Teleprinter, Healtheon shall cause SBCL to be the party to whom any bill is sent from the telecommunications carrier for a Phone Line to a new teleprinter* installed pursuant to Section 1.1.1(d) of this Agreement.
		If the Year One Teleprinter Cost [] the sum of, for all [] of Year One, the [] multiplied by the number of [], then SBCL shall pay Healtheon an amount equal to [] if the term "[]" were used instead of [*].
	contracts.onecle.com /webmd/smithkline.svc.1999.01.19.shtml (11874 words)

	Telstra ClassRoom - The Story of Digital Transmission and Data Communication - Section 2 (Site not responding. Last check: 2007-10-06)
		By the 1950s the teleprinter was the main telegraph terminal device in use.
		At the switching centre, equipment recognised the address, stored the message and transmitted the telegram to the receiving teleprinter when the line was free.
		The Creed model teleprinter, based on a printing telegraph developed by the Creed brothers in England early this century, could transmit approximately 66 w.p.m.
	www.telstra.com.au /classroom/sec_1_2.htm (1122 words)

	Telekrypton
		His theory was that the five-unit electrical impulses produced by a teleprinter, when directly connected with a wire, could be mixed at the moment of transmission with a second series of impulses to give a third and meaningless series.
		This last would appear upon the receiving teleprinter as a mere jumble of characters unless the second series of impulses were removed before the message was printed.
		The code tape, which consisted of a string of random teleprinter characters, was joined at the ends to form a loop.
	www.jproc.ca /crypto/telekrypton.html (2583 words)

	The Little Magazine - Via Media - Paul Zacharia - The night desk
		As he watched the bit of news crawl under the teleprinter, Mrityunjayan said, "It came from the teleprinter; it has gone back to the teleprinter.
		Through the night, the teleprinter, like a garrulous madman, excreted rolls of paper as it kept up its announcements of world news.
		He was filled with dismay and wonder at the thought of his numerous skeletons and fossils, in various shapes and sizes; all tucked away frozen in the womb of the earth.
	www.littlemag.com /viamedia/paulzacharia.html (737 words)

	[No title]
		To meet this requirement in the case of in-local working, the return of the call-connected signal has to be delayed until the moment when the teleprinter of the obtained subscriber has in effect been connected to line (see Recommendation S.9 [3]).
		In order to restrict charging on unsatisfactory calls, the particular interval should be kept as short as possible and should not exceed 3 seconds for new networks or 6 seconds for existing networks.
		U.1 signal may comprise the answerback code of the teleprinter or a group of teleprinter characters identifying the service point or switchboard position.
	www.nmedia.net /docs/ccitt/1992/u/u1.txt (3926 words)

	Looking at 'Teleprinter Exchange'.
		To progress your search for the term teleprinter exchange, visiting Connected Earth's website should be rewarding.
		It's a complete multi-media experience, which gives you the power to choose from comprehensive narratives, more detailed study, pictures of artefacts in 3D, spoken or written material from former telecommunications industry workers, short movies, and interactive explanations or simple animations of the way that technology operates.
		Connected Earth is an appropriate place to further your exploration of the subject teleprinter exchange.
	www.connected-earth.com /content/teleprinter_exchange.html (271 words)

	The Newmanry History
		On the assumption that a teleprinter machine was being used, two problem
		confirmed the hypothesis that a teleprinter machine was being used and answered
		teleprinter sign corresponding to each of the letters 3, 4, 8, 9, +, and /, were
	www.codesandciphers.org.uk /documents/newman/page297.HTM (548 words)

	Telecom Dictionary T: Phone Service Definitions
		Teleprinters were quite common years ago as input terminals for computers, but have given way to the video screen.
		Teleprinters were widely used starting with the very first computers.
		Paper tape was widely used on teleprinters to record incoming data.
	www.faxswitch.com /Definitions/telecom_dictionary_t.html (14435 words)

	Offices on the move - Perth
		It was the first time that Western Australia had ever had a teleprinter installed and they wanted to take a photograph of me using the teleprinter – and that could not be permitted: security, security couldn’t let them see that we had a teleprinter in Western Australia.
		A teleprinter was first installed in Perth in the war years to facilitate communication.
		By secraphone and teleprinter he is able to maintain constant touch with general headquarters, and with his department officials in Canberra and Melbourne.
	john.curtin.edu.au /behindthescenes/onthemove/perth.html (468 words)

	PDP-8 Console Teletype Instructions
		The teleprinter buffer register holds the character that is to be output to the asynchronous interface.
		Modifying this register while it is being used to generate output may produce unpredictable results, but on early models of the asynchronous interfaces (prior to the M8655), repeatedly writing zero to this register was an effective way to emulate the pressing of the break key on a teletype.
		One problem with the design of the TTY interface is that the teleprinter flag, like all device flags, is cleared on reset and powerup, but for many purposes, it would be better to have this flag set, indicating that, at startup time, the teleprinter buffer register is ready to receive one character of output.
	www.cs.uiowa.edu /~jones/pdp8/man/tty.html (1219 words)

	Hypertext MPEP: 1834.01 Use of Telegraph, Teleprinter, Facsimile Machine (Site not responding. Last check: 2007-10-06)
		PCT Rule 92.4 provides that a national Office may receive documents by telegraph, teleprinter, or facsimile machine.
		Accordingly, applicants may not currently file papers in international applications with the United States Patent and Trademark Office via telegraph or teleprinter.
		Generally, any paper may be filed by facsimile transmission with certain exceptions which are identified in 37 CFR 1.6(d).
	patents.ame.nd.edu /mpep/18/1834.01.html (351 words)

	SWEDISH SA TELEPRINTER CIPHER SYSTEM Cryptologia - Find Articles
		Being a country with a policy of neutrality, Sweden could not seek assistance from foreign nations; up until the late 1970's expertise in the cryptographic area could almost exclusively be found in the nations SIGINT organizations.
		In 1948 the inventors P-E Ahlman,A Lindegren, and V Lindstein filed a patent application for a teleprinter cipher machine which was known by the abbreviation SA5.
		Boris Hagelin and his company AB Crypto Teknik, on which Sweden had relied on as a supplier, were in the process of relocating[3] to Switzerland, consequently, before long, Sweden would be without a domestic cipher company.
	www.findarticles.com /p/articles/mi_qa3926/is_200401/ai_n9361747 (852 words)

	Bialphabetic teleprinter for texts in latin and arabic characters - Patent 4137425
		A teleprinter according to claim 1, comprising a pair of answer back devices associated with said alphabets and selectively operable in connecting the teleprinter according to either of said alphabets, and means for automatically generating said sequence in response to the alphabet which has been selected in connecting the teleprinter.
		A teleprinter according to claim 1, wherein the keys of said keyboard bear the symbols of both alphabets, so that the two keyboards are superimposed in a single layout, and including encoding means for encoding the keyboard signals according to the alphabet selected each time.
		In this case the result of the logic decision 137 is positive and the operator of the local teleprinter or of the remote calling station emits the sequence corresponding to the alphabet chosen by him (operation 143), that is either the sequence LLLL for the latin operation of the sequence GGGG for the arabic operation.
	www.freepatentsonline.com /4137425.html (6238 words)

	Teleprinter console - Patent 4058355
		In the case of mobile teleprinters or data printers, such as those used in outside broadcasting vehicles for example, a major problem is presented by the casing used to protect the printer equipment against excessively heavy shocks during transportation.
		It is known in the case of teleprinters to use stable casings for transportation purposes, but these casings have to be removed at the place at which the teleprinter is to be set up and used.
		It is another object of the present invention to provide a teleprinter or data printer console which includes bracket means which may be used alternatively as a support for the console in a ready-for-use position and as a transportation aid when the equipment is to be moved.
	www.freepatentsonline.com /4058355.html (1658 words)

	teleprinter Definition: TechEncyclopedia from TechWeb (Site not responding. Last check: 2007-10-06)
		Teleprinters were quite common years ago as input terminals for computers, but have given way to the video screen.
		Teleprinters were widely used starting with the very first computers.
		Paper tape was widely used on teleprinters to record incoming data.
	www.techweb.com /encyclopedia/defineterm.jhtml?term=teleprinter (286 words)

	Teleprinters for the radio amateur.
		Some machines were fitted with a 3000 rpm synchronous motor for operation at 50 Bauds, and are not directly suitable for operation at 45.45 Bauds without an external AC mains upply running at 45.45 Hz, or some other form of electronic speed conversion.
		This page printing teleprinter was introduced in 1954 as a stop gap measure pending the development of a totally new teleprinter (the model 75), and is really only an advanced model 7E in an all enclosing silence cover.
		This page printing teleprinter is a very rare development of the model 75, and uses separate transmit and receive camshafts in a similar manner to other Creed teleprinters.
	home.iprimus.com.au /oseagram/creed1.html (7024 words)

	Teleprinter and Speech
		A teleprinter of the cold war era was a large Electro-mechanical device resembling an electric typewriter.
		Before the FAX machine became popular with businesses during the late 1980's, Teleprinters were favoured as an 'instant' communications medium as they produced a hard copy.
		The design of the teleprinter is ingenious, consisting of hundreds of moving parts.
	www.ringbell.co.uk /ukwmo/tpr.htm (556 words)

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