Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 117
, D, is turned. This slow motion is produced by a screvvon the axis, a, working in the lower part of the headstock, just as the slide-rest is moved along the bed of the lathe. The movable headstock, whenit has been moved into the position required, is firmly clamped by a thumb-screw. The face of… … Fig. 30.— WJiitwortlCs Measuring Machine. fraction of an inch the size of the work measured differs from a certainstandard piece. Each headstock carries a screw of o^^ inch pitch, madewith the greatest possible care and accuracy. To the head of the screwin the movable headstock is attached the…
Inventions
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