A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 17
points may alwaysbe kept perpendicular to thepaper when drawing circles, asin Fig. 11. The style of compasses shownin Fig. 8 have what is called atongue joint, in which the headof one leg has a tongue, gener-ally of steel, which moves bCtween two lugs on the otherleg. Another common style ofjoint… … Fig. 8 §13 GEOMETRICAL DRAWING The brace that forms a part of this joint is generally pro-vided with a handle, as the shape of the joint makes it rather
