Data General Corporation

Lawrence Seligman

Edwin A Jeffery

James P Ballard

Ralph A Perron

A diagnostic display terminal system for remotely troubleshooting hardware, software and operational malfunctions in a computer over telephone lines includes a user-site diagnostic display terminal assembly and a support-site diagnostic display terminal assembly. Each diagnostic display terminal assembly includes a microprocessor controlled display terminal, a telephone instrument and a split baud rate modem, the modem serving to interface the display terminal and the telephone instrument to a telephone line. The system provides alternate voice and data communication between the user-site and the support-site and permits almost instantaneous change-over between voice and data. The telephone link effectively merges the two display terminals together in that each display terminal can monitor the actions of the other and that each display terminal can run all programs executable at the user-site display terminal. When not being used for diagnostic purposes, the display terminal at the user-site functions as a conventional display terminal.

Diagnostic display terminal system

A scanning system and method for reading coded indicia carried on containers, etc., the system and method including means for generating in a predetermined sequence a first light pattern, and a second light pattern, and means for focusing same at a window over which containers carrying the coded indicia are positioned. The disclosure also includes a mirrored rotatable polygon structure including a plurality of mirrors, some of which are inclined at a positive angle and the others which are positioned at a negative angle with respect to the polygon axis of rotation as well as means for adjusting the incline of the mirrors.

Scanning system and method

A method of reading on a record medium a two level code representing at least one character of a set of characters, each character having six consecutive transitional occurrences between the two levels of the code comprising: scanning the record medium to derive a time based electrical signal representative of said transitional occurrences; measuring four periods between alternate ones of said transitional occurrences; comparing each two overlapping periods to generate three ratios, each ratio representing not more than one of three possible values of nearly one, smaller than one and larger than one, and; decoding the values arrived at for said three ratios to define a character. The arrangement of the coded indicia on the record medium or the font of type for imprinting the same is such that, for each character, not more than two bits of the same level are arranged consecutively and two consecutive bits of a first level are not immediately followed by two consecutive bits of a second level.

Growing community of inventors

Sherborn, MA, United States of America

Lawrence Seligman