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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 ...
This pantograph uses a single-arm design. The electric transmission system for modern electric rail systems consists of an upper, weight-carrying wire (known as a catenary) from which is suspended a contact wire. The pantograph is spring-loaded and pushes a contact shoe up against the underside of the contact wire to draw the current needed to ...
Longarm quilting is the process by which a longarm sewing machine is used to sew together a quilt top, quilt batting and quilt backing into a finished quilt.. A complete longarming system typically consists of a sewing machine head, a frame, a table with a layer of plastic (under which is placed a pantograph), and several rollers on which the fabric layers and batting are attached.
One of his most famous inventions was the Benton Pantograph, an engraving machine which not only was capable of scaling a single font design pattern to a variety of sizes, but could also condense, extend, and slant the design. [5]
One of the most notable differences in appearances between the two locomotives was the pantograph(s): the El-C had one double-arm (Stemmann) pantograph, whereas the E44 had two single-arm (Faiveley) pantographs: a characteristic born of the PRR's operating practice of having two pantographs per locomotive. The EL-C, while of utilitarian design ...
Typically, the end cars of each 4-car unit have powered bogies, with the two middle cars being unpowered. The pantograph is located on one of the unpowered cars. [2] The specifications for all current designs (2009) describe asynchronous three-phase motors, with forced air cooling. [2]
A pantograph connected to a pencil produced within a few minutes a "grand trait", a contour line on a piece of paper. With the help of a second scaling-down pantograph, the basic features of the portrait were transferred from the sheet in the form of dotted lines to a copper plate, which had previously been prepared with a ground for etching.
The Brecknell Willis Low Height pantograph is one of the four standard devices in use on British railway locomotives and multiple units and is a development of the standard Brecknell Willis High Speed pantograph. The Low Height pantograph is suitable for speeds up to 160 kilometres per hour (99 mph).
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