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The hand-held electric pen was powered by a wet cell battery, which was wired to an electric motor mounted on top of a pen-like shaft. According to the manual, the motor drove a reciprocating needle that could make 50 punctures per second or 3,000 per minute. The user was instructed to place the stencil on firm blotting paper on a flat surface ...
Drafting pantograph in use Pantograph used for scaling a picture. The red shape is traced and enlarged. Pantograph 3d rendering. A pantograph (from Greek παντ- 'all, every' and γραφ- 'to write', from their original use for copying writing) is a mechanical linkage connected in a manner based on parallelograms so that the movement of one pen, in tracing an image, produces identical ...
Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...
Dremel (/ ˈdrɛməl / DREM-əl) is a multinational brand of power tools, focusing on home improvement and hobby applications. Dremel is known primarily for its rotary tools, such as the Dremel 3000, 4000 and 8200 series, which are similar to the pneumatic die grinders used in the metalworking industry by tool or moldmakers.
The first series of Federally-issued United States banknotes was authorized by Congressional acts on 17 July 1861 (12 Stat. 259) and 5 August 1861 (12 Stat. 313). While the Demand Notes were issued from the United States Treasury, they were engraved and printed elsewhere. In 1861, in fact until the mid-1870s, the Treasury Department lacked the ...
A 'penny press' at the Royal Armouries Museum in Leeds. This produces elongated coins from one new penny piece. An elongated coin (also known as a pressed penny or smashed penny) is a coin that has been flattened or stretched, and embossed with a new design. Such coins are often used as commemorative or souvenir tokens, and it is common to find ...
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