Cyclopedia of mechanical engineering; a general reference work. Editor-in-chief Howard Monroe Raymond. Assisted by a corps of mechanical engineers, technical experts, and designers of the highest professional standing (1908)
American School (Chicago, Ill.), Raymond, Howard Monroe · Chicago American Technical Society · leaf 59
only groundto a chisel point, as shown at a, but will be less liable to causesplitting, and will work faster and with greater ease, if ground toa double spear point, as shown at h. The four comers, if keptsharp, will enter the wood and cut faster than the chisel point. 43 36 patter:n making… … Fig. 72.Among the tools which cannot be dispensed with are the braceand an assortment of boring bits. The most desirable style ofbrace is the ratchet brace, illustrated in Fig. 73. The convenience of the ratchet will soonbe apparent from thenecessity, so often aris-ing, for boring holes ordriving…
Mechanical engineering -- Dictionaries
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