Rogers' drawing and design; an educational treatise relating to linear drawing; machine design; working drawings; transmission methods; steam, electrical and metal working machines and parts; lathes; boiler and parts; instruments and their use; tables, etc (1913)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 381
for. The joint ai the head of the dividers shouldbe kept not too tight, for unless there is a hair-spring attachment, as described above, it will be dif-ficult to adjust the dividers accurately, owing to thespring in the legs. Lost motion in the head jointis also a very objectionable feature, and… … Fig. 582. Fio. 583. Fig. 584. circles. The two points should be adjusted evenly,that is they should be of the same length, otherwise,very small circles cannot be described. To open orclose either of the above mentioned instruments; Fig. 585. Fig. i support it in a vertical position byresting the…
Mechanical drawing · Machine design
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