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Similar to the Geodreieck, a number of other protractor triangle types exist for navigation purposes. Various designs are named navigation (protractor) triangle, nautical navigational triangle, nautical set square, Portland (navigational) triangle or Portland protractor triangle, Kent-type triangle, Inoue-type A/B nautical triangle or plotting triangle, course triangle, yachtsmen triangle, and ...
Speed square, or rafter square, or rafter angle square, or triangle square, or layout square A speed square is a triangular carpenters square combining functions of the combination square, try square, and framing square into one. It can be used to calculate and mark angles, to suspend a plumb bob, and as a fence for a circular saw. [21] [22] [23]
Traditionally, objects like pencil, compass, ruler, drawing triangle have been considered design tools and have been used to characterize design and designers. [4] One reason for the success of traditional design tools such as pencil and paper is that these tools can be used without any special knowledge and their usage facilitates a continuous ...
Rulers may also be used as a support for separate special rulers and letter templates. The rules are replaceable and they can be for example scale-rules. Drawing apparatus has evolved from a drawing board mounted parallel ruler and a pantograph , which is a device used for copying objects in an adjustable ratio of sizes.
Drafting templates assist the drafter with creating recurring objects in a drawing without having to reproduce the object from scratch every time. This is especially useful when using common symbols; i.e. in the context of stagecraft , a lighting designer will draw from the USITT standard library of lighting fixture symbols to indicate the ...
Drafting board with a T-square and triangle. A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table. The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a short shaft called the "stock" or "head".
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