Improvements in Drawing Compasses.

Abstract

24,252. Diedam, J. Oct. 23. Compasses. - Relates to compasses in which the legs are maintained parallel to each other. The legs a, b are rotatably held in sockets in plates c, d hinged together at f, a spring m being provided which tends to draw the plates together. The adjusting-screw i has a lefthanded thread over which works a sleeve h having an external right-hand thread operated by the milled head k, the arrangement being such that the compasses are closed when the sleeve h abuts against the leg a. In a modification, the adjusting-device is above the plates c, d.

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    Publication numberPublication dateAssigneeTitle
    US-2428964-AOctober 14, 1947Elmer E FifePivoted-leg compass