Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 12
viders has been made. Spring-bow Instruments. The spring-bow di-viders, pencil and pen, as shown in Fig. 6, are for the purpose of describing small circles and layingoff distances of very small dimensions and arevery convenient for these purposes. Any form ofspring-bow instruments with… … 6—Spring-bow Instnunents. shank are undesirable, because the parts are liableto become loose. The spring-bow dividers areused like the hair-spring dividers, for the spacingof distances, they have the advantage of beingfixed in any position so that there is no liability ofa change of measurement by…
Mechanical drawing · Machine design
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