IMPROVEMENTS IN MACHINERY FOR CUTTING WHEEL RACK TEETH OR PERFORMING SIMILAR WORK UPON THE SURFACES OF TUBES OR OTHER ARTICLES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by James Henry Stone at the Office of
the Commissioners of Patents on the 23rd August 1883.
JAMES HENRY STONE trading as "Benton & Stone" of Birmingham in the
County of Warwick "IMPROVEMENTS IN MACHINERY FOR CUTTING WHEEL RACK
TEETH OR PERFORMING SIMILAR WORK UPON THE SURFACES OF TUBES OR OTHER
ARTICLES."
This Invention consists in the construction and arrangement of the parts of the
Milling or Cutting Machinery hereinafter described, whereby the teeth, or grooves
of a double-sized rack or similar article are cut or shaped simultaneously, and with
greater rapidity than heretofore accomplished
The arrangement is as follows:-Upon a suitable bed or base-plate which may
be of metal or wood, there is mounted a sliding piece of sufficient length to suit the
greatest length of work to be wrought. This sliding piece is guided in its longi-
tudinal motion by suitable grooves or other guides, and upon the said sliding piece
is carried one or more poppits or supports which in their turn, support or carry the
tube or other article to be cut or shaped
This sliding piece is moved forward with an intermittent motion, or feed, as
hereinafter described
Again, Upon the bed or base-plate before mentioned, is fixed a cast iron frame
which carries chiefly the moving parts of the machine, and also carrying the fixed,
or lower half of the vice or grip, which securely holds the piece to be wrought
upon when in operation
Two Revolving Cutters of suitable shape are carried upon adjustable spindles,
whose axis lie parallel to each other, and are driven by gear or spur wheels from
two other spindles whose axis also, are parallel to the cutter spindles, the gear
wheels upon the latter or driving spindles gearing into each other and also into the
wheels upon the cutter spindles. Upon one of these driving spindles is fixed the
driving pulley, or is attached, the driving handle, or other motive power. Upon
the other driving spindle is carried a screw-worm which actuates a worm-wheel.
The cutter-spindles, driving spindles, and worm-wheel are each and all carried by,
and fitted to the same casting, which is made capable by suitable guides of a
71

page_text: reciprocating sliding motion upon the cast iron frame before mentioned, this
reciprocating motion being produced by means of a crank-pin upon the worm-
wheel or its spindle, which revolves in a fixed slot upon the cast-iron frame of the
machine. Thus, as the crank pin is prevented having a vertical motion, by reason
of the fixed slot, which is at right-angles to the slide which carries the worm-
wheel, the vertical motion is communicated to the slide itself, and as a consequence
a vertical reciprocating motion is given to the cutting tools
A second vertical slide is also attached to the frame of Machino which forms the
top half of the vice or grip for securely holding the piece being operated upon, the
slide or grip being held down firmly by means of springs, weights and levers
By means of a combination of levers, cams, and ratchet wheel and pinion, or of
levers, cams and screw, or both combined, an automatic intermittent motion is
giving to the sliding piece which carries the tube or other piece to be operated
upon. This motion may be obtained either when the cutters have passed the tube
or other piece upon their downward motion, or when at the top of their motion, or,
when both at top and algo at bottom of their motion
By this means a cutting operation may be performed both in the descending and
ascending motions of the cutters if desired