Lukin, James. [from old catalog] · New York, G. P. Putnam's sons · leaf 84
e poppit, and having three vertical mortises and threehorizontal ones opening into the others. In the verticalones were three squared plugs of wood, and in the OUR RENOVATED LATHE. 73 horizontal ones were wedges which, being driven in,raised the plugs until their upper surfaces touched, andpressed… … Fig. 6.—Our Renovated Lathe. against its screw, the mandrel would of necessitytraverse end-wise at the same rate as the pitch of thatparticular guide screw. Hence, this is called a traversingmandrel, and a screw to match any one of the guides iseasily cut upon wood or metal by merely holding a…
Handicraft · Steam-engines
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