File:Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892) (14584082937).jpg

Identifier: modernmechanisme00benj (find matches)
Title: Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics
Year: 1892 (1890s)
Authors: Benjamin, Park, 1849-1922
Subjects: Mechanical engineering
Publisher: New York, D. Appleton
Contributing Library: Mugar Memorial Library, Boston University
Digitizing Sponsor: Boston University

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
ed, and can be set to any angle. The circular arbor also hasindependent feed, and is operated from the pulley end of the machine. The tables are raisedand lowered by screws, and the aprons on which the tables work are moved on bed by a rackand pinion. The aprons have a bearing low down on the bed, to insure solidity when takinga heavy cut. The vise jaws open 15 in., and are 15 in. long. The vise is graduated, andswivels ou a heavy base-plate. WrighVs Friction Shaper.—Fig. 2 shows a new form of shaper made by J. D. Wright &Sons, Brooklyn, N. Y. The driving shaft seen on the side of the machine carries two loosepulleys ; the forward one is the cutting pulley and has two steps, giving two speeds in cutting,and carries an open belt. The rear pulley is the return pulley, and carries a cross belt froma large pulley on the countershaft, giving a quick return. These pulleys ai-e thrown into andout of gear by a friction clutch. The side bearings for the shaft are adjustable for wear, and
Text Appearing After Image:
Fig. 2.—Wrights friction shaper. have wicks drawing oil from the cup beneath. The worm runs in oil. It is of steel, hard-ened and polished, and meshes in the large phosphor-bronze wheel. The wheel is secured tothe end of the rack shaft, passing through the base of the machine, to which are secured thetwo rack wheels. The teeth of the rack are at an angle to the line of the shaft, and are rightand left, preventing any side thrust. The loose pulleys on the driving-shaft are turned onthe inside of their rims to a taper. The outside of the friction-rims is turned to the sametaper, and in action is forced into the loose pulleys by a shifting-fork. The shank of thefork has a certain amount of spring, which relieves the friction and pulleys from the shockor jar of the ram when reversing its motion. The cross-feed is given to the table by the screwratchet and rod which is secured to the lower part of the disk, which disk is compressedbetween leather disks. The friction of the leather causes

Note About Images