Drafting instrument

Details Drafting instrument Drafting instrument

B - Operations, Transporting

43

L

33/69

B43L 7/00 (2006.01)

Patent

CA 1289350

ABSTRACT OF THE DISCLOSURE A protractor quadrant too] accessory is provided and consists of two arms attached pivotally together at one end, degree calibrations so that the angle between the arms is readily read and a locking device whereby the angle between the arms can be maintained fixed so that the protractor quadrant tool accessory can be used by a carpenter to measure angles on various articles. In a modification stud guides attached to outer parallel straight edges of the arms can stabilize the tool accessory when measuring the stairways stud angles and the like, used as an isometric center finder and making equal and opposite converse lines upon a stud. In still another modification an adjustable trimitre is slideably locked upon one arm so as to stabilize the tool accessory when measuring the stud angles and the like to be cut. -11-

543428

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