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A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.
The duplicator was pioneered by Thomas Edison and David Gestetner, with Gestetner dominating the market up until the late 1990s. Like the typewriter , these machines were products of the second phase of the Industrial Revolution which started near the end of the 19th century (also called the Second Industrial Revolution ). [ 1 ]
David Gestetner (31 March 1854 – 8 March 1939) was the inventor of the Gestetner stencil duplicator, the first piece of office equipment that allowed production of numerous copies of documents quickly and inexpensively. He also invented a new kind of nail clipper.
A pulse duplicator replicates parts of the circulatory system. Many pulse duplicators model only half the heart, commonly the left atrium and ventricle, in order to test the mitral and aortic valves. A common design to model the heart uses a piston to simulate the contraction and expansion of the heart.
The Interface Message Processor (IMP) was the packet switching node used to interconnect participant networks to the ARPANET from the late 1960s to 1989. It was the first generation of gateways, which are known today as routers.
There are two standard types of router—plunge and fixed. When using a plunge-base router, the sole of the base is placed on the face of the work with the cutting bit raised above the work, then the motor is turned on and the cutter is lowered into the work. With a fixed-base router, the cut depth is set before the tool is turned on. The sole ...
Notable custom-firmware projects for wireless routers.Many of these will run on various brands such as Linksys, Asus, Netgear, etc. OpenWrt – Customizable FOSS firmware written from scratch; features a combined SquashFS/JFFS2 file system and the package manager opkg [1] with over 3000 available packages (Linux/GPL); now merged with LEDE.
A spirit duplicator (also Rexograph and Ditto machine in North America, Banda machine and Fordigraph machine in the U.K. and Australia) is a printing method invented in 1923 by Wilhelm Ritzerfeld, which was used for most of the 20th century. The term "spirit duplicator" refers to the alcohols that were the principal solvents used in generating ...