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IBM 1627
The IBM 1627 was a Rebranding, rebranded Calcomp plotter sold by IBM for use with the IBM 1620, and, later, the IBM 1130 computers. It became perhaps the first non-IBM peripheral that IBM allowed to be attached to one of its computers. The plotter fed a roll of paper with perforated edges over a drum with matching sprockets at the sides. The drum could move the paper forward and backward (the X-axis). A pen holder slid horizontally over the paper (the Y-axis). Both the drum and the pen holder were controlled by stepper motors. Commands included lowering the pen down to write and raising it up, and moving the drum or the pen holder one step of in either direction. There were also commands to move the drum and pen together one step in the four diagonal directions. The standard size 1627 Model 1 was a Calcomp model 565 plotter and used 12-inch-wide paper (305 mm) with a plotting area of . Model 1 could operate at 18,000 steps per minute. Model 2 was a Calcomp 563 and used 31 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rebranding
Rebranding is a marketing strategy in which a new name, term, symbol, design, concept or combination thereof is created for an established brand with the intention of developing a new, differentiated identity in the minds of consumers, investors, competitors, and other stakeholders. Often, this involves radical changes to a brand's logo, name, legal names, image, marketing strategy, and advertising themes. Such changes typically aim to reposition the brand/company, occasionally to distance itself from negative connotations of the previous branding, or to move the brand upmarket; they may also communicate a new message a new board of directors wishes to communicate. Rebranding can be applied to new products, mature products, or even products still in development. The process can occur through a change in marketing strategy or in various other situations such as Chapter 11 corporate restructuring, union busting, or bankruptcy. Rebranding can also refer to a change in a company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcomp Plotter
Calcomp plotters (sometimes referred to as CalComp plotters) were the best known products of the California Computer Products company ( Calcomp or CalComp). Overview The Calcomp 565 drum plotter, introduced in 1959, was one of the first computer graphics output devices sold. The computer could control in increments the rotation of an wide drum, and the horizontal movement of a pen holder over the drum. The pen was pressed by a spring against paper scrolling across the drum. A solenoid could lift the pen off the paper. This arrangement allowed line drawings to be made under computer control. Later, Calcomp manufactured its model 563, which was very similar but had a wide drum. The paper rolls were long. A metal bar above the take-up reel allowed a finished plot to be torn off and removed. The drum would then be advanced using the manual controls and the fresh paper end taped to the take-up reel. The standard pen was a ball-point, but liquid ink pens were available, and typi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 1620
The IBM 1620 was announced by IBM on October 21, 1959, and marketed as an inexpensive scientific computer. After a total production of about two thousand machines, it was withdrawn on November 19, 1970. Modified versions of the 1620 were used as the CPU of the IBM 1710 and IBM 1720 Industrial Process Control Systems (making it the first digital computer considered reliable enough for real-time process control of factory equipment). Being variable-word-length decimal, as opposed to fixed-word-length pure binary, made it an especially attractive first computer to learn on and hundreds of thousands of students had their first experiences with a computer on the IBM 1620. Core memory cycle times were 20 microseconds for the (earlier) Model I, 10 microseconds for the Model II (about a thousand times slower than typical computer main memory in 2006). The Model II was introduced in 1962. Architecture Memory The IBM 1620 was a variable "word" length decimal ( BCD) computer with a mag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 1130
The IBM 1130 Computing System, introduced in 1965, was IBM's least expensive computer at that time. A binary 16-bit machine, it was marketed to price-sensitive, computing-intensive technical markets, like education and engineering, succeeding the decimal IBM 1620 in that market segment. Typical installations included a 1 megabyte disk drive that stored the operating system, compilers and object programs, with program source generated and maintained on punched cards. Fortran was the most common programming language used, but several others, including APL, were available. The 1130 was also used as an intelligent front-end for attaching an IBM 2250 Graphics Display Unit, or as remote job entry (RJE) workstation, connected to a System/360 mainframe. Description The total production run of the 1130 has been estimated at 10,000. The 1130 holds a place in computing history because it (and its non-IBM clones) gave many people their first direct interaction with a computer. Its pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stepper Motor
A stepper motor, also known as step motor or stepping motor, is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is correctly sized to the application in respect to torque and speed. Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated. Mechanism Brushed DC motors rotate continuously when DC voltage is applied to their terminals. The stepper motor is known for its property of converting a train of input pulses (typically square waves) into a precisely defined increment in the shaft’s rotational position. Each pulse rotates the shaft through a fixed angle. Stepper motors effectively have multiple "toothed" electromagnets arranged as a stator around a central rotor, a gear-shaped piece of iron. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball-point Pen
A ballpoint pen, also known as a biro (British English), ball pen (Hong Kong, Indian and Philippine English), or dot pen ( Nepali) is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e. over a "ball point". The metal commonly used is steel, brass, or tungsten carbide. The design was conceived and developed as a cleaner and more reliable alternative to dip pens and fountain pens, and it is now the world's most-used writing instrument; millions are manufactured and sold daily. It has influenced art and graphic design and spawned an artwork genre. Some pen manufacturers produce designer ballpoint pens for the high-end and collectors' markets. History Origins The concept of using a "ball point" within a writing instrument to apply ink to paper has existed since the late 19th century. In these inventions, the ink was placed in a thin tube whose end was blocked by a tiny ball, held so that it could not slip into the tube or fall out of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seattle World's Fair
The Century 21 Exposition (also known as the Seattle World's Fair) was a world's fair held April 21, 1962, to October 21, 1962, in Seattle, Washington, United States.Guide to the Seattle Center Grounds Photograph Collection: April, 1963 , University of Washington Libraries Special Collections. Accessed online October 18, 2007. Nearly 10 million people attended the fair.Joel Connelly Century 21 introduced Seattle to its future , '' |
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