Improvements in Appliances for Cutting Milling Tools, Wheel Gearing, Twist-drills, and like Objects.
Year: 1889

page_text: Date of Application, 17th Jan., 1889
Complete Specification Loft, 17th Oct 1080 Accented
30th Nov.
1889
PROVISIONAL SPECIFICATION.
Improvements in Appliances for Cutting Milling Tools, Wheel
Gearing, Twist-drills, and like Objects.
I, THOMAS GARE of 25 Booth Street, Edgeley, Stockport in the County of
Cheshire, Engineer, do hereby declare the nature of this invention to be as
follows:
My invention has for its object to provide lathes with an appliance for cutting
milling tools, wheel gearing, twist drills and like objects, which is automatically
operated by the lathe, and can be readily fitted to or removed from it.
My improvements consist principally in the combination with a lathe cross feed
slide rest, of a carrier or support on which the object to be cut is mounted on a stud
or spindle, one end of which is hinge like and circularly adjustable, connected to and
moved by the cross feed screw of the slide rest, the other end thereof being in
contact with a stationary former plate shaped according to the contour of tooth
required.
The tool which operates on the object to be cut, is fixed onto a mandrel or spindle
and caused to rotate between the centres of the lathe, the face of the object to be
cut being moved against the rotary tool by means of the cross feed screw of the
slide rest.
The object to be cut may be mounted on the said carrier or support on a vertical,
inclined or horizontal stud or spindle, and the latter,provided with a dividing wheel,
actuated by hand or by self-acting means..
The described appliance may be similarly employed in a milling machine or
arranged to form a separate machine for the said purposes.
. 1
27
1
T
1009
F. BOSSHARNT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Appliances for Cutting Milling Tools, Wheel-
gearing, Twist Drills, and like Objects.
I, THOMAS GARE, of 25 Booth Street, Edgeley, Stockport, in the County of
Cheshire, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :—
My invention has for its object to provide lathes with an appliance for cutting
milling tools, wheel gearing, twist drills and like objects, which is automatically
operated by the lathe, and can be readily fitted to or removed from it.
And in order that my invention muy be more fully understood, I have caused to be
appended hereunto two sheets of drawings marked with letters of reference indicating
like parts in the various figures.
Figs. 1, 3 & 5 are cross sections, Figs. 2, 4 & 6 plans respectively of a lathe
showing my improvements applied. Fig. 7 is a side view and Fig. 8 an end view
showing some modifications thereof.
a is the lathe bed, 6 the cross feed slide rest, c the back shaft, d the head stock
and e the tail stock.
In carrying out my invention and referring to the figures generally, the improve-
ments consist principally in the combination with a lathe or other cross feed slide
rest b, of a carrier or support, on which the object g to be cut is mounted on a stud
or spindle h, and one end of which is hinge-like and circularly adjustable, connected
to and moved by the cross feed screw ₁, the other end thereof being, preferably
DO11

page_text: formed fork like and furnished with a pin or roller 1, in contact with a stationary
former plate m shaped according to the contour of tooth required.
In Figs. 1 & 2, which show. the appliance fitted to a screw cutting lathe without
gap, the hinged end of the carrier or support is arranged to bo raised or lowered
and moved longitudinally, by being attached to a slide made vertically adjustable
on the bracket, which is capable of sliding longitudinally in the table k.
The former plate m I make capable of vertical and inclinatory adjustment in the
bracket by means of slots m, m2 and bolts m³ and the bracket o of circular
adjustment on the table o¹, which is arranged longitudinally adjustable in the
bracket o, fixed on the bed ³.
The tool which operates on the object g to be cut, is fixed onto a mandril or
spindle pl and caused to rotate between the centres-of-the-head stock d and tail
stock-e, and the face of the object g to be cut, moved against the rotary tool p by
means of the cross feed screw and slide rest b, in the usual way from the back
shaft c by means of worm wheel gearing p², p³.
The object g to be cut may be mounted on the said carrier or support f on a
vertical, inclined or horizontal stud or spindle h, and the latter provided with a
dividing wheel, actuated by hand, by self acting or other well known means, which
will effect the required periodical partial rotation of and lock the object g to be cut in
position.
Figs. 3 & 4 show the appliance fitted to work in the gap of a lathe. The hinged
end of the carrier or support fis made vertically adjustable on the bracket c², which
over hangs and is radially adjustable on the cross feed-slide-rest-b-
In lion of employing a former m-as shown in Figs. 1 & 2, a disc q may be
employed, formed with surfaces or slots m, which act as formers and give-the-
necessary contour-to-the tooth-to be cut.
The disc g is capable of rotary adjustment on its stud i, so as to permit the use of
either one or the other of the formers m and vertically as well as inclinatory, by being
arranged to slide-on-a-bracketq, made radially adjustable on the bracket of fixed unto
the bed 62.
The object y to be cut, in this case is mounted on a stud fixed on a bracket ¹
bolted to the carrier or support f.
Figs. 1, 2, 3 & 4 show the latter fixed at a right angle to the centre of rotation of
the tool p, so as to cut the object g parallel to its axis, but it will be evident that by
circularly and longitudinally adjusting the brackets c² & o the carrier or support f
may be fixed and the object g cut at any desired angle thereto.
To facilitate the cutting of bevel or spur wheels the same are mounted onto the
carrier or support f by means of a stnd or spindle h with or without bracket h¹ and
acted upon by the tool p similar as herein before described.
Figs. 5 & 6, show the appliance adapted to cut twist drills. The carrier or
support fis positioned horizontally by connecting the forked or former end thereof,
by means of the pin to the table o¹.
The latter is formed with an arm o³ to which is fixed a screw m, formed with the
desired pitch at which the twist drill g is 'to be cut and which serves as the former.
A nut forming part of a grooved pulley is employed on the screw m and
formed with a sleeve f³, the end of which forms a chuck into which the drill g to
be cut is fixed.
In order to resist the pressure of the cutter p the front end of the latter and the
sleeves, are supported respectively by means of brackets g¹, g' bolted to the carrier
or support.
Around the pulley f2 is laped a weighted cord f' which, by the medium of the
nut and the screw m, causes simultaneously the rotation and forward movement of
the tool against the drill g to be cut.
In lieu of the screw m a hollow tube with a thread cut through the same may be
used and the chuck connected to the pulley by means of a pin passing through
the thread in the said tube and into the pulley f. In place of the weighted cord 1°,
the pulley f and nut f¹ may be rotated by hand.

page_text: In order to facilitate the cutting of teeth to form any section and diameter of a
circle I mount the object g, to be cut on a bracket r, see Figs. 7 & 8, adapted to be
raised and lowered on a bracket 1, carried radially movable on the stud m by a
bracket, bolted to the carrier or support f.
The stud in which forms the centre of oscilation for the bracket r acts as a former
and is always in a line with the centre of the circle section of the periphery of the
object to be cut, thus permiting of imparting to the latter the necessary radial
motion, which may be caused either by hand or weight.
The described appliances slightly modified are equally applicable to milling
machines or may easily be arranged to constitute an independent machine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
"In appliances for cutting milling tools, wheel-gearing, twist-drills and like
objects."
1st. The employment of a carrier or support f, adapted to bring the object g to be
cat.against a milling tool p, rotating always in the same position, with reference to
the figures generally, substantially as set forth.
2nd. The combination with a sliding rest b, of a carrier or support fas specified in
the preceding claim, one end of which is hinge like attached thereto and the
other end thereof controlled by a former m, with reference to Figs. 1, 2, 3 & 4,
substantially as set forth.
3rd. The carrier or support adapted to support the object g to be cut, the
simultaneous rotation and forward movement of which against the milling tool p is
controlled and effected by a screw m serving as a former, with reference to Figs. 5
& 6, substantially as set forth.
4th. The carrier or support f furnished with a bracket in combination with a
bracket r carrying the object g to be cut and capable of being oscilated on a stud m
adapted to serve as a former and to control and permit of a circular movement of the
object to be cut, relative to the milling tool p, with reference to Figs. 7 & 8,
substantially as and for the purpose specified.
Detail this 16th day of Octo... 1809
F. BOSSHARDT & Co.,
9, Milton Grove, Stockport, Agents to Applicant.