Improvements in Machinery for Cutting Wheel Rack Teeth or Performing similar Work upon the Surfaces of Tubes or other Articles. OR PERFORMING SIMILAR WORK UPON THE SURFACE OF TUBES OR OTHER ARTICLES
Year: 1884

page_text: Improvements in Machinery for Cutting Wheel Rack Teeth or
Performing similar Work upon the Surfaces of Tubes or
other Articles.
I JAMES HENRY STONE trading as Benton & Stone, of Birmingham in the County
of Warwick Manufacturer, do hereby declare the nature of my Invention for
IMPROVEMENTS IN MACHINERY FOR CUTTING WHEEL RACK TEETH OR PERFORMING
SIMILAR WORK UPON THE SURFACE OF TUBES OR OTHER ARTICLES to be as
follows:-
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 sided 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 longitudinal 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 intermittant motion or feed as herein
after 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 axes lie parallel to each other and are driven by gear or spur wheels from
two other spindles whose axes 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.

page_text: The Cutter-spindles driving spindles and worm wheel are each and all carried
by, and fitted to the same casting which is made capable of suitable guides of a
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 machine 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 intermittant motion is given
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 also at bottom of their motion.
By this means a cutting operation may be performed both in the descending and
ascending motion of the cutters if desired.

page_text: "
I, JAMES HENRY STONE, trading as Benton and Stone, of Birmingham, in the
county of Warwick, Manufacturers do hereby declare the nature of my invention
of IMPROVEMENTS 1N MACHINERY FOR CUTTING WHEEL RACK TEETH OR
PERFORMING SIMILAR WORK UPON THE SURFACES OF TUBES OR OTHER ARTICLES ;
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:—
"
The 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 sided rack, or similar articles are cut or shaped simultaneously and
with greater rapidity than heretofore.
On the accompanying drawings Fig. 1 is a side elevation, and Fig 2 a plan of a
machine embodying my improvements.
Fig. 3 is a back end view, and Fig. 4a front end view, both partially in section-
and Fig. 5 is a side sectional view of the same machine. Fig. 6 is a sectional plan
through the axis of the cutter spindles. .
In all the view A is a bed or base plate constructed of metal, wood, or other
suitable material and upon which is mounted a sliding frame B of sufficient length
to suit the greatest length of tube V or other article to be cut or operated upon,
and which tube V is mounted between poppets or headstocks D, D¹ rising from the
same sliding frame. This sliding frame B is guided in its longitudinal traverse
along the bed plate A by being mounted in suitable V slides A¹ and is moved
forward intermittently as hereinafter described. Rising from this same bed plate
is a pedestal E the projecting part F of which constitutes the lower half or jaw of
a vice for holding or steadying the tube V during the cutting operation and the
upper jaw F of which vice is mounted in V slides F2 formed in the back of the
pedestal E this upper jaw being constantly pressed down by the action of
the lever F3 secured to the spring W. In front of this same pedestal and similarly
mounted upon V slides or guides R R¹ is a reciprocating bracket P carrying four
projecting arms the two upper arms G³ supporting and forming the bearings for
the adjustable cutter spindles H H' carrying at their extremities the steel or other
cutters G G¹ which perform the cutting operation on each side of the tube V
simultaneously and the lower arms G³ forming the respective bearings for the
shafts J J. These shafts are geared together by the spur wheels K K¹ which also
gear with pinions I I¹ upon their respective cutter spindles as seen inore clearly
in Fig. 4. The shaft J constitutes the driving shaft of the machine and has
revolving motion imparted to it by a strap passing round the driving pulley M or
motion may be communicated by gearing or by a winch handle or in any other
convenient manner. The other shaft J is provided with a worm N gearing with
a worm wheel O revolving upon the fixed spindle K2 secured to the projection L
from the bracket P, this worm wheel is provided on its outer face with a crank
pin S which is arranged to work in a slot formed in the stationery bracket N¹ and
so that as such crank pin revolves (and is prevented by reason of the slot from
having a vertical motion) it will necessarily cause the bracket P with its various
spindles and shafts to reciprocate up and down and thus impart the requisite
vertical traverse to the revolving cutter simultaneously and which thus cut the
groves on each side of the tube V It only now remains to explain how the
necessary intermittent motion is communicated to the sliding frame B carrying
the tube V to be operated upon as aforesaid and in order to cut the teeth or

page_text: grooves therein at the necessary distance from each other. This necessarily takes
place at the instant when the cutters G G₁ are either at the top or bottom of their
traverse or when they have passed the tube or other piece V upon their upward or
downward movement or when both at the top and bottom of their motion and so
producing a cutting operation both during the ascending and descending strokes
of the reciprocating bracket. To accomplish this we employ a lever X mounted at
or near the upper extremity of the slotted bracket Q such lever having its other
extremity connected by a rod T to a loose radial arm U branching from the shaft a
and also to a ratchet pawl b gearing with a ratchet wheel c. This ratchet wheel c
is mounted upon the shaft a which also carries a spur wheel d gearing with
a toothed rack e formed on the underside of the travelling frame. It will thus be
apparent that by having an adjustable stud P¹ affixed upon and projecting from
the sliding bracket P and arranged to keep in contact with the underside of the
said lever X (during the upward stroke of the sliding bracket by the action of the
spiral spring P2) that a proportionate motion will be communicated to such lever
as the bracket traverses up and down and that this motion will in turn be
communicated to the pawl B causing the same to engage with one, two or more
teeth of the ratchet wheel c and further that upon the return stroke of the
bracket P the travelling frame B will be moved forward intermittently and to the
desired extent. The adjustable plate ƒ serving to limit the downward movement
of the said lever. By means of this machine grooves, teeth or other projections
can be formed simultaneously on opposite sides or other parts of metal, rods, tubes
or other articles by the use of corresponding forms of revolving cutters mounted at
the extremities of the cutter spindles, and although only a pair of cutters have been
hereinbefore described and illustrated on the accompanying drawings it will be
apparent that each spindle may carry two or more such cutters.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is 1st The general construction and arrangement of cutting or milling
machinery whereby slots, grooves, teeth or other projections can be cut or formed
simultaneously upon metal rods, tubes or other articles substantially as hereinbefore
described and illustrated on the accompanying drawings.
2nd Mounting two or more cutters upon spindles in a reciprocating bracket and
gearing and operating the same substantially as and for the purposes herein before
described and illustrated on the accompanying drawings.
3ly The combination and arrangement of mechanism for imparting the necessary
intermittent travelling motion to the tube or other article being operated upon by
revolving cutters acting simultaneously substantially as herein before described and
illustrated on the accompanying drawings.