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Expired
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Victor Winkler
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Individual
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Individual
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Publication of GB191208415ApublicationCriticalpatent/GB191208415A/en
B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
B43L7/00—Straightedges
B43L7/10—Plural straightedges relatively movable
B43L7/12—Square and pivoted straightedges
Landscapes
Drawing Aids And Blackboards
(AREA)
Abstract
8415. Winkler, V. April 9. Rulers; protractors.-A main ruler a has an arm b pivoted to it which may be adjustable in length and carries a set-square to enable parallel or other lines to be drawn. The ruler may be slotted, and in a modification carries two arms b, one at each end, these arms being transversely slotted to facilitate the drawing of parallel lines.
GB191208415D1912-04-091912-04-09Improvements in Ruling and Drawing Devices.
ExpiredGB191208415A
(en)