Century Dictionary and Cyclopedia
- n. A draftsman's compass having a compass-end upon one leg and a socket for a pencil on the other, or with one leg fitted so that the compass-end can be detached and a pencil put on in its place. In the cut, h and g are the legs, e and d the needle-point and lead-holders. They have shanks fitted to sockets in h and g, and are fastened in the sockets by set-screws f, f′ ; a is a needle-point which fits a socket in the lower end of e, and is held by a small set-screw i; c is a spring-clamp in which the lead b is clasped when the screw k forces its jaws together.
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