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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 ...
Example of a void pantograph pattern before (left) and after (right) the document has been photocopied. In security printing, void pantograph refers to a method of making copy-evident and tamper-resistant patterns in the background of a document. Normally these are invisible to the eye, but become obvious when the document is photocopied.
The pantograph was an improvement on the simple trolley pole, which prevailed up to that time, primarily because the pantograph allows an electric-rail vehicle to travel at much higher speeds without losing contact with the overhead lines, e.g. due to dewirement of the trolley pole.
William Leavenworth in 1834 introduced the pantograph, allowing the same form to be reproduced from a pattern, and manufactured wood type in Allentown, New Jersey. [ 48 ] [ 49 ] [ 50 ] A pantograph has remained a standard way of making wood type, although several other methods have been used such as die-cutting [ 51 ] and making the letter as a ...
In security printing, various methods such as void pantograph are used to create patterns that are hard to copy exactly and when copied inexactly produces an easily detectable image. This can include halftone screens that are affected by the copying process, fine line patterns in different directions that are differently affected by copying and ...
A technical lettering stencil. Technical lettering is the process of forming letters, numerals, and other characters in technical drawing.It is used to describe, or provide detailed specifications for, an object.
The exception in this list is Watt's parallel motion, which combines Watt's linkage with another four-bar linkage – the pantograph – to amplify the existing approximate straight line movement. It is not possible to create perfectly straight line motion using a four-bar linkage, without using a prismatic joint .
The center portion of TriMet "Type 1" (Bombardier/BBC) MAX light rail car #110 with its "ice cutter" pantograph (on the left) in use, along with its regular, power-drawing pantograph (on the right), while stopped at the Beaverton Transit Center station in December 2022. The ice-cutting pantographs were added to seven of the 26 Type 1 MAX cars ...