Search results
Results from the WOW.Com Content Network
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 ...
Freehand lettering is done without the assistance of tools. To regulate lettering height, commonly 3 mm (1 ⁄ 8-in), guidelines are drawn.Mechanical lettering is done using tools such as lettering guides, templates, or using a small mechanical pantograph referred to by the Keuffel and Esser trademark "Leroy"
The (asymmetrical) Z-shaped pantograph of the electrical pickup on the Berlin Straßenbahn. 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 ...
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.
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 ...
One form has two straight legs joined by a hinge; one leg has a sharp pivot point and the other has a holder for a technical pen or pencil. Another form, the beam compass, has the pivot point and pen holder joined by a trammel bar, useful when drawing very large radius arcs. Often a circle template is used instead of a compass when predefined ...
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.
Jacquard cards were said to be stamped or cut, rather than punched. The first Jacquard cards were stamped by hand, sometimes using a guide plate. An improvement involved placing the card between two perforated metal plates, hinged together, inserting punches according to the desired pattern, and then passing the assembly through a press to cut the card.