. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ly adjusted. A steel collar is fitted with a feather toslide on the spindle, and is held in position by nuts. This, being adjusted to contact with theend of the box, holds the spindle from end-long motion in one direction, while it is held frommotion in the other direction by the step ;S. This construction is intended to prevent dis-turbance of adjustment due to contraction and expansion from changes of temperature.
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . ly adjusted. A steel collar is fitted with a feather toslide on the spindle, and is held in position by nuts. This, being adjusted to contact with theend of the box, holds the spindle from end-long motion in one direction, while it is held frommotion in the other direction by the step ;S. This construction is intended to prevent dis-turbance of adjustment due to contraction and expansion from changes of adjusted, the boxes are restrained from turning in their seats by the adjusting-nuts,which are always screwed against the casting ; but while being adjusted to the spindle, pinsin the outside of the boxes fit in grooves in the seats, these grooves holding the boxes fromturning around, but permitting lateral movement. A series of holes is drilled around thecircumference of the boxes, so that by placing the pins in different holes the boxes may beoccasionally partially rotated in their seats, thus equalizing the wear, and tending to keep thespindle in a central Fig. 3.—Head-stock. The handle L (Fig. 3) is for disengaging or changing from coarse to fine or fine to coarsefeed, which is done by means of the following arrangement: The feed-gear inside the head ison a feathered shaft, and may, by moving the handle to the two positions shown by dottedlines, be geared to either the gear on the spindle or that on the cone, the difference in feedbetween the two positions being 9 to 1. This, which is applicable to either longitudinal orcross feed, or to screw-cutting, with the changes of both gear and belt-feed to the feed-rod,provides for a great range of feed, from that fine enough for any purpose to that extremelycoarse, for surface-work or for cutting screws or worms of coarse pitch. Fig. 4 is a section through the carriage and bed. The feed-rod is at the front and th
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
