Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
  • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
  • H04L13/182—Printing mechanisms
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code

Definitions

• a process for providing a receiving printer with the correct removable and interchangeable type carrying unit of element to print text in the same language and compatible with the text transmitted from a remotely located keyboard device.
• the transmitting station Prior to transmitting text, the transmitting station sends a code corresponding to the type font required at a receiving station. This code is selected so that it is made up of characters and/or functions which are the same for all type elements and/ or all receivers.
• the type element corresponding to the transmitted code is placed on the receiving printer so that the received text is exactly the same as the transmitted text.
• each typewriter terminal is one which has the capability of interchanging the type carrying unit or type font. All typewriter terminals are identical in regard to the positioning for printing of a type carrying unit in response to received signals. The terminals respond identically at least in form of display regardless of the different type unit connected into the terminal. In other words, at least some symbol will be printed at a distant station when a symbol is transmitted.
• a code is established, which code is based essentially on form rather than content.
• the message originating station sends a message having the form corresponding to the established code for the language in which the message originating station wishes to transmit. As an example, the sending station may send a carriage return, one symbol, a tabulation, two symbols, a tabulation, and two symbols.
• the form would be identical, although the symbols printed might be completely different.
• the receiver a comparison is made of the form received to the established code, and then the type carrying unit is replaced with the one dictated by the code. Subsequent messages received will be identical to those transmitted.
• This invention is useful with any teletypewriter system in which the print element or type font may be interchanged.
• the assignee of this invention markets a substantial number of typewriters in which the print element is a truncated spherical shell carrying a font of symbols in the form of raised symbols.
• the typewriter functions by rotating and tilting the print element or head to select the character desired.
• the print head is hurled bodily into the print station to thereby effect typing of the single symbol selected by the rotate-tilt movement.
• US. Patent 2,919,002 is'a readily available teaching of this typewriter.
• This typewriter in a form called the Input/Output form, is marketed as a unit capable of responding to signals received from long distance communications.
• In the Input/Output form received signals trigger solenoids which initiate the print cycle and the rotate-tilt selections.
• US. Patent 3,082,854 teaches this Input/Output form sufficiently for the purposes here.
• an Input/ Output form of the typewriter above described is publicly available as a teletypewriter terminal for long distance communications of the kind commonly associated with teletypwriters. This teletypewriter system is described in System Operation Reference Manual, IBM 1050 Data Communication System, File No. 10509, Form A24- 3020-3, Major Revision, January 1965.
• the significant feature of the terminal is the interchangeability of the type head.
• Typewriters of the kind above described are presently used in many countries, and these typewriters are basically identical.
• the key designations and linkage are somewhat different in various countries, however, so as to conform to the standard keyboard of the locality.
• the type heads also differ in the location of characters used so as to achieve the optimum design and coordination of keyboard and type head for each country.
• the same types and degrees of rotate-tilt are effected by all of the machines since their selection mechanisms are substantially identical.
• a combination of these characters can be used as a universal code.
• the signal could come from any country.
• the display fCn might be received.
• the operator at receiving station has no direct rneans of knowing what station originated the message.
• the operator will recognize the code as one indicating that the message comes from a French machine.
• an operator using a standard French machine has simply typed out the above code configuration on his keyboard.
• the United States operator having knowledge, of course, of the agreed code, would replace the type head of his machine with a French type head. It can be agreed that he would signal this by typing some other code, for example, five C characters transmitted in succession.
• the local station When transmitting, the local station almost always will use the type element for which his machine is designed Transmission will therefore be in the local language or in a foreign language having symbols available in the local language.
• the local station is a standard United States machine as described.
• a station having a terminal designed for use in any language should be contacted over a communications or teletypewriter link by the United States terminal first sending a message preceded by the pre-estwblished code for the United States. This could be uCa. After a delay or after a suitable reply indicating that the heads had been changed at any or all distant stations contacted, the full text of the message is transmitted by typing the message as one would normally type an written matter.
• the number of codes available is basically very large, even if the type heads of the various countries do not share similar letters at identical positions as above described.
• the French-Canadian type head for printers as above described is the only type head known to be available which does not share any character with the other type heads presently available to the world.
• the French-Canadian type head does print a character for each character transmitted and it does go through the identical printer functions as that transmitted.
• a suitable code in accordance with this invention could use a combination of characters and functions.
• a carriage return, then any two characters, then a carriage return, then any three characters could be the agreed upon code designating the type head of some country, for example, Germany.
• the display would have the form XXX and would be easily recognized.
• the receiving terminal would recognize this form regardless of what symbols were printed at each location, and would insert a German type head onto the receiving machine.

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Computer And Data Communications (AREA)
• Accessory Devices And Overall Control Thereof (AREA)
• Record Information Processing For Printing (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=23919677

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (1)

• 1965
  • 1965-08-27 US US483343A patent/US3429986A/en not_active Expired - Lifetime
• 1966
  • 1966-07-29 FR FR7975A patent/FR1488680A/fr not_active Expired
  • 1966-08-09 BE BE685263D patent/BE685263A/xx unknown
  • 1966-08-26 NL NL6612109A patent/NL6612109A/xx unknown

Patent Citations (1)

Also Published As

Similar Documents