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IBM 370 Printer
The IBM 370 printer was used on the IBM 305 RAMAC computer system, introduced by IBM on September 14, 1956. The 370 was connected to the 305 by a serial data line from the ''S track'' of the computer's drum memory (the printer and punch both obtain information from a single output track, the control as to what information to print or punch and how, is within the print and punch units) and printed 80-columns with a punched tape controlled carriage. Line formatting was programmed by inserting wire jumpers into a plugboard control panel. The printer mechanism used an eight sided, seven position (56 character) print slug in a horizontal orientation. The ''X'', ''O'', and ''2'' bits of the character code rotate the slug and the ''1'', ''4'', and ''8'' bits selected the position. The platen hammer then struck the paper from behind, causing the selected character to print. Of the 56 characters on the print slug, only 47 were printable with the standard valid character set of the IBM 305 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 370 Printer (1)
The IBM 370 printer was used on the IBM 305 RAMAC computer system, introduced by IBM on September 14, 1956. The 370 was connected to the 305 by a serial data line from the ''S track'' of the computer's drum memory (the printer and punch both obtain information from a single output track, the control as to what information to print or punch and how, is within the print and punch units) and printed 80-columns with a punched tape controlled carriage. Line formatting was programmed by inserting wire jumpers into a plugboard control panel. The printer mechanism used an eight sided, seven position (56 character) print slug in a horizontal orientation. The ''X'', ''O'', and ''2'' bits of the character code rotate the slug and the ''1'', ''4'', and ''8'' bits selected the position. The platen hammer then struck the paper from behind, causing the selected character to print. Of the 56 characters on the print slug, only 47 were printable with the standard valid character set of the IBM 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 305 RAMAC
The IBM 305 RAMAC was the first commercial computer that used a moving-head hard disk drive (magnetic disk storage) for secondary storage. The system was publicly announced on September 14, 1956,650 RAMAC announcement The 305 RAMAC and the 650 RAMAC were internally announced on September 4, 1956. with test units already installed at the U.S. Navy and at private corporations. RAMAC stood for "Random Access Method of Accounting and Control", as its design was motivated by the need for real-time accounting in business.IBM RAMAC promotional film /ref> History The first RAMAC to be used in the U.S. auto indu ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drum Memory
Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria. Drums were widely used in the 1950s and into the 1960s as computer memory. For many early computers, drum memory formed the main working memory of the computer. It was so common that these computers were often referred to as ''drum machines''. Some drums were also used as secondary storage as for example various IBM drum storage drives. Drums were displaced as primary computer memory by magnetic core memory, which offered a better balance of size, speed, cost, reliability and potential for further improvements. Drums in turn were replaced by hard disk drives for secondary storage, which were both less expensive and offered denser storage. The manufacturing of drums ceased in the 1970s. Technical design A drum memory or drum storage unit contained a large metal cylinder, coated on the outside surface with a ferromagnetic recording material. It could be considered the precu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carriage Control Tape
A carriage control tape was a loop of punched tape that was used to synchronize rapid vertical page movement in most IBM and many other line printers from unit record days through the 1980's. The tape loop was as long as the length of a single page. A pin wheel moved the tape accurately using holes in the center of the tape. A hole punched in one of the other channels represented a particular position on the page. Channel one was typically used to indicate the top of the page and might be the only channel used. Another channel might indicate the summary line on an invoice, enabling rapid skipping to that line. IBM provides a special manual punch that allowed accurate placement of the channel punches. Skipping occurred under computer control, but a form feed switch on the printer control panel allowed a manual skip to the top of the page. The tapes could be easily changed when new, continuously fed forms were loaded into the printer. Forms control buffer Newer printers use a "form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plugboard
A plugboard or control panel (the term used depends on the application area) is an array of jacks or sockets (often called hubs) into which patch cords can be inserted to complete an electrical circuit. Control panels are sometimes used to direct the operation of unit record equipment, cipher machines, and early computers. Unit record equipment Main article: Unit record equipment The earliest machines were hardwired for specific applications. Control panels were introduced in 1906 for the Hollerith Type 1 Tabulatorphoto of Type 3 with built-in control panel here. Removable control panels were introduced with the Hollerith ( IBM) type 3-S tabulator in the 1920s. Applications then could be wired on separate control panels, and inserted into tabulators as needed. Removable control panels came to be used in all unit record machines where the machines use for different applications required rewiring. IBM removable control panels ranged in size from 6 1/4" by 10 3/4" (for ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Printers
In computing, a printer is a peripheral machine which makes a persistent representation of graphics or text, usually on paper. While most output is human-readable, bar code printers are an example of an expanded use for printers. Different types of printers include 3D printers, inkjet printers, laser printers, and thermal printers. History The first computer printer designed was a mechanically driven apparatus by Charles Babbage for his difference engine in the 19th century; however, his mechanical printer design was not built until 2000. The first patented printing mechanism for applying a marking medium to a recording medium or more particularly an electrostatic inking apparatus and a method for electrostatically depositing ink on controlled areas of a receiving medium, was in 1962 by C. R. Winston, Teletype Corporation, using continuous inkjet printing. The ink was a red stamp-pad ink manufactured by Phillips Process Company of Rochester, NY under the name Clear Prin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
