Improvements in Automatic Turning Machines for Shaping, or Shaping and Cutting Off Lengths of, Metal.
Year: 1898

page_text: Date of Application, 1st Mar., 1898
Complete Specification Left, 1st Dec., 1893—Accepted, 28th Jan., 1899
PROVISIONAL SPECIFICATION.
Improvements in Automatic Turning Machines for Shaping, or
Shaping and Cutting Off Lengths of, Metal.
I, HERBERT AUSTIN, Works Manager to the Wolseley Sheep Shearing Machine
Company, Limited, of Sydney Works, Alma Street, in the City of Birmingham,
Manufacturers, do hereby declare the nature of this invention to be as follows:-
This invention relates, more especially, to what are known as capstan or turret
lathes or machines, that is to say, to machines in which cutting or shaping tools
are carried in a capstan or turret head which is alternately advanced towards
the metal to be operated upon and drawn back again to clear a tool therefrom,
and is partially turned between the backward and forward movement to bring
another tool into position so that when advanced it will operate upon the metal.
In describing the complete invention, I will do so with particular reference
to a machine of the "Spencer" type, to which its application is more particularly
intended.
The invention comprises: -(1) improvements in the construction of the cam
by means of which the speed of the machine is automatically varied to cause the
speed of movement of the capstan or turret head, and of the other operative parts
of the machine, to be adapted for each of their respective functions; (2) means
for readily adapting the machine for using a less number of tools in the capstan
or turret head than such head is capable of holding, without unnecessary move-
ments of the head, and without greater delay between the successive operations
of a single tool, when such only is employed, and in such case with even less
delay, if required, than between the operations of two tools of a full set of which
one is next in succession to the other, and in the case of two or more tools with-
out greater delay between the operations of any two of such tools of which one
is next in succession to the other, than is required in turning the head the greater
distance necessary to bring each successive tool into position for being moved
forwards to operate: (3) an improved construction of rocking arm or bracket, and
tool holder or holders for sideway cutting, which avoids the inconvenience
frequently experienced with sideway vibrating cutting mechanism of bringing
the cutting tool or tools into contact with the metal to be cut in a direction
which points considerably above or below its centre, and improved means for
use in regulating the depth of cut, which are applicable also in the case of a
slide used instead of a rocking arm or bracket; and (4) improved combined
means for reciprocating and turning the capstan or turret head which carries the
tools.
1
An adjustable cam, constructed according to this invention, for the purpose
above stated, has the bearing portion formed, as is usual, to present a number
of separate faces which may be moved outwards or inwards independently of one
another. Each of these separate faces forms the outer face of a plate or head;
and, according to this invention, each plate or head has formed therewith a
shank which projects from the middle thereof at the back. Each head is securely

page_text: fixed to the main portion of the cam by means of its shank.
If the cam is
intended to operate sideways against the bearing roller of the lever which is
operated by the cam, the cam is formed as a disc and holes are formed through
the disc for the reception of the shanks aforesaid; but, if the cam is intended to
operate edgeways, it is formed with a flange there-around and holes are formed
through the flange for the reception of the shanks. The shanks may be securely
fixed to the main portion of the cam in any manner which admits of their being
readily adjustable endways to adjust the heads into any positions required in
relation to one another. The shanks may, for instance, be screwed through the
holes of the cam and be locked by means of nuts on their hinder ends; or the
shanks may be screwed and the holes be plain, and the shanks be adjusted and
locked in position each by means of a pair of lock nuts at opposite sides of the
metal through which the shanks pass; or the shanks may be fixed by means of
set-screws screwed through the metal of the cam transversely of the holes. The
plates or heads, of which the outer faces form the bearing surfaces for the roller,
may be readily adjusted in relation to one another, in respect of their distance
outwards from the face or edge of the cam, by moving the shanks or any of them,
as required; endways, within the holes through which they pass.
In adapting the machine to use a less number of tools, such, for instance, as
one, two or three, in the capstan or turret head, than the number, such for
instance as two, four or six, which such head is capable of holding, without
unnecessary movements of the head, and without greater delay between the
successive operations of a single tool, when such only is employed, and in such
case with even less delay, if required, than between the operations of two tools of
a full set of which one is next in succession to the other, and, in the case of
two or more tools, without greater delay between the operations of any two of
such tools, of which one is next in succession to the other, than is required-in
turning the head the greater distance necessary to bring each successive tool
into position for being moved forwards to operate, means are provided according
to this invention, in the case of a single tool only for simply moving the capstan
or turret head endways to-and-fro while it is constantly prevented from being
turned, or, in the case of two or more tools, for continuously turning the capstan
or turret head so long as it is not held from turning by a locking pin or other
contrivance and for reciprocating it endways when so held, means are provided,
in the case of two or more tools, for holding out the locking pin, or other
appliance used for preventing the head from turning, for a sufficient length of
time to prevent the turning of the head being stopped in the positions required
when the omitted tools are used, and means are used also, in the case of a single
tool or two or more tools, for varying the relative speeds of the capstan or turret
shaft and the cam shaft so as to synchronate the movements of the other parts
of the machine to suit the altered timing of the movements of the capstan or
turret head. The means for reciprocating the capstan or turret head when held
from turning, and for continuously turning it when not locked from turning,
may consist, conveniently, of the arrangement hereinafter described for such
purpose, or of any convenient means, such as those now in use for the purpose.
The means employed for holding out the locking pin,, or other appliance, afore-
said, for preventing the head from turning, consist of a suitable cam-piece, or
of cam-pieces, carried by the cam which regulates the movements of the pin or
appliance, and which, or each of which, is of such shape and length that it or
they will draw the pin or appliance out of engagement with the head and hold-
it out so as to clear, as required, one or more grooves of the head with which
it would otherwise engage; or if the appliance consists of pins carried by the
head itself, such cam-piece or cam-pieces is or are adapted to draw the head
into such position that a pin or pins thereof pass clear of a stop against which
it or they would otherwise be stopped and thus stop the turning of the head.
The means for varying the relative sperds of the capstan or turret shaft and cam

page_text: shaft are similar to those adopted for varying the relative speeds of a lathe
spindle and the leading screw. The required effect may be produced by simply
changing the pinion on the capstan or turres shaft and the wheel on the cam
shaft, but it is preferred to interpose intermediate gear which is carried by a stud.
The improved rocking arm or bracket for sideway cutting, which forms a
feature of the invention, has the portion thereof to which the tool holder, or each
tool holder, is fixed, formed at its outer face as a portion of a cylindrical surface
which is concentric with the axis upon which the arm rocks. The tool holder,
or each tool holder, is fixed against this cylindrical surface by means of a screw
which passes through a slot formed through the thickness of the metal against
which the tool holder, or each tool holder, beds; and thus the tool holder, or each
tool holder, may be moved circumferentially upon the cylindrical surface of the
arm, in either direction, and be securely fixed by means of its screw,
in any
position to which it has been moved. It will be seen that, in whichever direction
a tool holder is moved circumferentially of the cylindrical surface. upon which
it beds, 'the distance of the cutting edge of the tool from the rocking centre
remains unaltered, and, therefore, if such position is once properly adjusted, it
remains so for all positions of the holder. The rocking arm is operated, for side-
way cutting, from a cam or cams through the medium of a head or heads which
or each of which communicates the pressure of the cam or a cam to the arm
through the medium of a spring. The head or each head is carried by a branch
of the rocking arm which extends in a downward direction at one side of the
vertical axis of the cam spindle. If two heads are used they are carried, respec-
tively, by branches of the rocking arm which extend in a downward direction
at opposite sides of such axis. An adjustable pin, screwed through the opposite
side of the arm to that which carries a head, by coming against a portion of the
framing of the machine, forms a stop to the movement of the arm which is
imparted to it through the medium of such head; and a similar pin may be used
through each side of the arm when the arm carries two heads, so that the move-
ment of the arm in each direction may he stopped by a pin. The positive stop
thus given to the movement of the arm, and consequently to the sideway cutter
which has been brought into operation by such movement, avoids risk of the
tool cutting in beyond the desired point, as it is liable to do when used with the
ordinary mechanism by which it is operated. The arrangement by which a cam
is caused to operate the arm, through the medium of a spring, taken in combina-
tion with the means by which the positive stop may be given to the operating
movement of the arm, enables fine adjustments to be made by means of the stop
pin only without altering the cam or the position of the tool, as the spring will
of course yield under any extra pressure which may be brought against the head.
If one head only is carried by the arm, so that it is operated only in one direc-
tion by a cam, the return movement of the arm is, of course, automatically
effected by means of a spring or weight. The means described of operating the
cutter or each cutter through the medium of a spring device and of regulating
the depth of cut by a stop pin may be employed also, in the case of a slide
used to carry the tool holder or holders.
The improved combined means for reciprocating and turning the capstan or
turret head, comprise, according to this invention, a spring by which the capstan
or turret head is normally held back, a deep annular groove, concentric with
the capstan or turret head, which is formed in the hinder end of such head, and
a rotating cam which is of annular transverse section at its base, is concentric
with, and is a turning fit within, the annular groove of the capstan or turret
head. A deep notch or recess is formed in from the outer edge of the cam.
This notch has inclined or curved sides which curve into the outer edge of the
cam and join one another by a somewhat sharp curve at their inner ends.
roller, within the groove of the capstan or turret head, is capable of turning
around a pin which passes transversely through the groove, and is securely
A'

page_text: fixed to the head, and this roller is of a diameter which allows it to pass up to
the inner end of the notch or recess of the cam. When the capstan or turret
head is in its backward position, with its roller at the inner end of the notch of
the cam, the friction between the side of the notch and the roller, caused by the
pressure of the spring which presses back the head, is such that, if the head is
free to turn it will be turned by the rotation of the cam; but when the head is
locked by the means provided therefor, and which may be of the usual or any
convenient character, the rotation of the cam causes one of its inclined sides
to press forward the roller, and with it the head, until it has pushed the roller
clear out of the notch. The head is then held in its outward position by the end
of the cam pressing against the roller, until the notch of the cam comes opposite
to the roller, when the head is again moved in by the spring. A special advan-
tage of this arrangement is that some play may be allowed between the roller
and the sides of the notch at the inner end thereof, whereby such minute
accuracy which has to be observed in the ordinary arrangement for the purpose,
as to the relative positions of the groove of the capstan or turret head, or other
stop, with which the locking pin, or other appliance for the purpose engages,
and the cam or portion which causes the turning movement of the head, is not
required, nor is the arrangement so liable to get out of order and become inopera-
tive.
It will be obvious that the invention, or parts thereof, may be applied, also,
to other automatic turning machines for shaping, or shaping and cutting off
lengths of, metal, besides the special type of machine in connection with which,
for the sake of convenience, the invention has been particularly described.
Dated this 28th day of February 1898.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.
Improvements in Automatic Turning Machines for Shaping, or
Shaping and Cutting off Lengths of, Metal.
I, HERBERT AUSTIN, Works Manager to the Wolseley Sheep Shearing Machine
Company, Limited, of Sydney Works, Alma Street, in the City of Birmingham,
Manufacturers, 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:
This invention relates, more especially, to what are known as capstan or turret
lathes or machines, that is to say, to machines in which, as usually employed,
cutting or shaping tools are carried in a capstan or turret head which is alter-
nately advanced towards the metal to be operated upon and drawn back again to
clear a tool therefrom, and is partially turned between the backward and forward
movements to bring another tool into position so that when advanced it will
operate upon the metal.
In describing the complete invention, I will do so with particular reference
to a machine of the "Spencer" type, to which its application is more particularly
intended.
The invention comprises: -(1) improvements in the construction of the cam
by means of which the speed of the machine is automatically varied to cause the
speed of movement of the capstan or turret head, and of the other operative parts
of the machine, to be varied to adapt them, respectively, for each of their respec-

page_text: tive functions; (2) means for readily adapting the machine for using a less
number of tools in the capstan or turret head than such head is capable of
holding, without unnecessary movements of the head, and without unnecessary
delay in the movements of the portions of the machine which control the other
operations of the machine which are required to synchronise with the operations
of the capstan head; (3) an improved construction of rocking piece or bracket,
and tool holder or holders for sideway cutting, which avoids the inconvenience
frequently experienced with sideway vibrating cutting mechanism of bringing
the cutting tool or tools into contact with the metal to be cut in a direction which
points considerably above or below its centre, and improved means for use in
regulating the depth of cut of a sideway cutting tool used with these kinds of
machines; and (4) improved combined means for reciprocating and turning the
capstan or turret head which carries the tools.
a
In the drawings which serve to illustrate my invention Figure 1 is a side
elevation of the portion of the machine to which my improve-
ments are applied, the capstan or turret head and the parts by
which it is carried and by which it is immediately rotated and
reciprocated endways being shewn chiefly in section. Figure 2 is a transverse
section, taken on line of Figure 1, looking in the direction of the arrow a³,
portion of the framing being broken away to shew parts thereof more clearly,
Figure 3 is a sectional view, taken on line yy of Figure 1, looking in the oppo-
site direction to the arrow a Figure 4 is an elevation, looking in the direction
of the arrow 6, of the end of the framing of the machine and of a set of wheels
forming a portion of change speed gear used in varying the relative speeds of the
capstan or turret head and of a shaft which controls the movements of the other
operative portions of the machine. Figure 5 is a detached view shewing, in
side elevation, the capstan or turret head and cam which rotates and moves the
same endways, with a portion of the side of the capstan head shewn as broken
away to enable the shape of the operative face of the came to be more clearly
indicated; and Figure 6 is a diagram shewing the shape of such face as a side
elevation of it would appear spread or opened out upon a plane surface.
A is the adjustable cam by means of which the speed of the machine is
automatically varied. This cam is or may be carried, as is usual, upon the cam
shaft B, and the bearing portion thereof is formed also, as usual, to present a
number of separate faces which may be moved outwards or inwards independently
of one another. Each of these separate faces forms the outer face of a plate or
head ; and, according to this invention, each plate or head has formed there-
with a shank which projects from the middle thereof at the back. The heads
are securely fixed to the main portion of the cam by means of their shanks in any
convenient manner which admits of their being readily adjustable endways to
adjust the heads into any positions required in relation to one another. In the
illustration the shanks are shewn to be screwed through holes through the main
portion of the cam and to be locked by means of nuts on the portions which
project from the back of the main portion of the cam. In the side elevation of
the cam, shewn by Figure 1, a few only of the adjustable portions are shewn,
the intermediate ones being omitted to avoid confusion. The variable speed
mechanism, which is operated by the cam is of a usual character.
mechanism illustrated consists of the lever f², fulcrummed at g', carrying a
roller against which the bearing faces of the cam press, and its upper end
engaging with a slide m¹ which carries the discs n' of the mechanism through
which the motion of a roller a³ is transmitted to a roller 62. The movement of
the lever moves the discs n¹ sideways, carrying the axis of such discs further
from one of the rollers and correspondingly nearer to the other. The lever f
is constantly maintained, by any suitable means, such as a spring c², or weight,
with the roller against the bearing faces of the cam.
The
In adapting the machine to use a less number of tools, such for instance as

page_text: one, two or three, in the capstan or turret head, than the number, such for
instance as two, four or six, which such head is capable of holding, without
unnecessary movements of the head, and without unnecessary delay in the move-
ments of the portions of the machine which control the other operations of the
machine which are required to synchronise with the operations of the capstan
head, means are provided according to this invention in the case of a single tool
only, for simply moving the capstan or turret head endways to-and-fro while it
is constantly prevented from being turned, or, in the case of two or more tools, for
continuously turning the capstan or turret head so long as it is not held from
turning by a locking pin or other contrivance and for reciprocating it endways
when so held, means are provided, 'in the case of two or more tools, for holding
out the-locking pin, or other appliance used for preventing the head from turn-
ing, for a sufficient length of time to prevent the turning of the head being
stopped in the positions (or position) required when the omitted tools (or tool)
are used; and means are used also, in the case of a single tool or two or more
tools, for varying the relative speeds of rotation of the parts which rotate around
the axis of the capstan or turret shaft and a shaft which controls the movements
of the other opérative portions of the machine so as to synchronise the move-
ments of such other operative portions of the machine to suit the altered timing
of the movements of the capstan or tumret head. The means for reciprocating
the capstan or turret head when held from turning and for continuously turning
it when not locked from turning, may consist, conveniently, of the arrangement
hereinafter described for such purpose, or may consist of any convenient means,
such as those now in use for the purpose.
The capstan head is provided with two or more longitudinal grooves d in its
outer face, as is usual, and the locking pin c may be allowed to enter each of
these grooves as it comes opposite to the pin and thus hold the head from turning
as many times during one revolution as there are grooves formed therein; but
when, for the purpose of this invention, it is desired to stop the turning of the
head a less number of times during each complete revolution thereof than there
are grooves formed in the periphery of such head, this is accomplished, accord-
ing to this invention, by holding the pin out clear from one or more of the grooves
as the head is turning. In the illustration, the capstan head is shewn as adapted
to hold four tools, but the cams by which the locking pin c is operated are shewn
as arranged and adapted to enable three tools only to be used. The two cams e¹
which are of the usual character, respectively draw out the pin from two consecu-
tive grooves, and the third cam e, which conresponds to the cams e¹ but is larger
circumferentially and is formed with a flat or curved surface in lieu of an apex,
not only draws out the pin from the third groove in succession but holds it out
also from entering the fourth groove, and the capstan head consequently con-
tinues to turn, after it has been held by the engagement of the pin with the
third groove, until the pin interlocks with the first groove.
The shaft B which carries the revolving portion to which the cams e e¹ el are
fixed, and which usually controls not only the movement of such cams but of
other operative parts of the machine which are required to synchronise properly
with the movements of the capstan head, must of course be geared with the
capstan head in a manner which will ensure the proper speed of rotation of the
shaft, and such speed will of course vary with the number of tools used in the
head. This variation in speed is provided for, according to this invention, by
means of a train of wheels such as f, g, h, which are interchangeable, or some of
which are interchangeable, with other wheels through the medium of which the
rotary movement of the revolving mechanism which operates the capstan head is
conveyed from a wheel i, which surrounds the axis of the capstan head, to the
cam shaft B.
The improved rocking piece or bracket D, which acts as a tool carrier for use in
sideway cutting, has the portion thereof ; to which the tool holder k, or each

page_text: tool holder, is fixed; formed at its outer face as the portion of a cylindrical
surface which is concentric. with the axis upon which the rocking piece rocks.
The tool holder, or each tool holder, is fixed against this cylindrical surface in
a manner which allows it to be moved circumferentially thereof, in either direc-
tion and be securely fixed in any position to which it has been moved. This is
conveniently effected by forming, in respect of the tool holder or each tool holder,
a slot through the thickness of the portion of the rocking piece through which
a pin passes by which the holder is fixed to the rocking piece. It will be
seen that, in whichever direction a tool holder is moved circumferentially of the
cylindrical surface upon which it beds, the distance of the cutting edge m of the
tool m from the rocking centre remains unaltered, and, therefore, if such posi-
tion is once properly adjusted, it remains so for all positions of the holder upon
the rocking piece.
The rocking piece D is operated, for sideway cutting, by means of a cam n
through the medium of a striker o which communicates the pressure of the cam
to the rocking piece through the medium of a spring 7. The striker o is carried
by an arm of the rocking piece which extends in a downward direction at one
side of the vertical axis of the cam spindle. An adjustable pin r, screwed
through an arm q' at the opposite side of the rocking piece to that which carries
the striker o, by coming against a portion E of the framing of the machine,
forms a stop to the movement of the rocking piece which is imparted to it through
the medium of such striker. The positive stop which is thus given to the move-
ment of the rocking piece and consequently to the sideway cutter which has been
brought into operation by such movement, avoids risk of the tool cutting in
beyond the desired point, as it is liable to do when used with the ordinary
mechanism by which it is operated. The arrangement by which the cam is
caused to operate the rocking piece through the medium of a spring, taken in
combination with the means by which the positive stop may be given to the
operating movement of the rocking piece, enables fine adjustments to be made
by means of the stop pin r only, without altering the cam or the position of the
tool, as the spring will, of course, yield under any extra pressure which may be
brought against the striker. When, as will usually be required, two cutting
tools are carried and openated by the rocking piece 1, a striker ol and spring 21
are carried in the lower end of the arm q¹ which extends in a downward direction
similarly as the arm q, a stop pin is screwed through the arm q, and the
striker is operated by means of a cam t¹, all as clearly shown by Figure 3.
The cams and are carried at opposite faces of a rotating disc G. The arm
is automatically moved back, after a cam passes out of contact with a striker,
in any suitable manner, such as by means of a spiring s.
The means described of operating the cutter, or each cutter, m³, through the
medium of a spring device, and of regulating the depth of cut by a stop pin r,
may be employed also, in the case of a slide used to carry and operate the tool
holder or holders, as will be readily understood.
The improved combined means for reciprocating and turning the capstan or
turret head comprise, according to this invention, a spring t which is connected
at its forward end to the capstan head and at its rear end with a pin u. This
piu passes through slots formed through opposite sides of the shaft w of the
capstan head, and its ends project into an annular recess or counterbore u
formed in the rear end of the sleeve cam F, hereinafter described and bear
against the inner end of such recess. The capstan head is moved forwards
against the force of the spring t, and is automatically returned by the reaction of
the spring. The slots are to allow of the endway movement of the spindle
in relation to the pin u. An annular groove a¹ is formed within the rear portion
of the capstan head, leaving a space between the shaft or spindle and such;
portion of the head. A rotating sleeve cam I is formed with a forward portion
which enters within the annular groove a¹ of the head. This cam is constantly

page_text: rotated in the same direction by means of the wheel b¹ which is fixed around the
hinder end thereof. The forward edge of this cam forms the operating or cam
face thereof, and the shape of such portion of the cam is shewn, by Figure 6, as
it would appear spread or opened out upon a plane surface. The cam rotates in
the direction indicated by the arrow, Figure 6. An anti-friction roller c¹ is
carried around a pin which passes through the annular groove a¹ and is
securely fixed so as to turn with the capstan head, and this roller is always
pressed, by the spring t, against the operative surface of the cam F. The inclina-
tion of the portion of the surface of the cam is such that if the capstan head
is free to revolve, that is to say, is not held from turning by the locking pin c,
the cam in revolving will carry round with it the capstan head; but if the
capstan head is locked from turning, the pressure of the inclined surface d
against the roller c¹ will have the effect of forcing forwards the head, and the
roller will then pass from the surface on to the long incline f¹, from thence
on to the short length of surface el of the cam, which is parallel with the direc-
tion of rotation, and then will run down the abruptly inclined surface h¹ as the
capstan head is moved back again by the spring t.
A special advantage of this arrangement of cam and roller for use in operating
the capstan or turret head besides the advantage it affords of enabling the
number of tools carried by the head to be varied without unnecessary movements
having to be performed by the head, is that the need is obviated for such minute
accuracy as has to be observed in the ordinary arrangement for the purpose as
to the relations between the mechanism by which the revolution of the capstan
or turret head is stopped and the mechanism which causes the turning movement
of the head; and, in addition, there is not the same liability to get out of order
and become inoperative as when the ordinary mechanism is used.
A weight suspended at one end of a cord or the like which passes over a
pulley and is connected at its other end with the capstan head may be used
in lieu of the spring t.
It will be obvious that the invention, or parts thereof, may be applied, also, to
other automatic turning machines for shaping, or shaping and cutting off lengths
of, metal, besides the special type of machine in connection with which, for the
sake of convenience, the invention has been particularly described.
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:-
:-
1. In an automatic turning machine, a cam provided with a number of heads
each formed with a bearing face and with a shank by means of which it is secured
to the main portion of the cam, each shank being adjustable endways to adjust
the position of the corresponding bearing face in relation to the other bearing
faces of the cam, in combination with variable speed mechanism through the
medium of which the speed of the machine is automatically varied by the cam,
substantially as described.
2. The improved cam having a number of separate bearing faces provided
with shanks which are operated to adjust such faces in relation to one another,
substantially in the manner described and shewn.
3. In an automatic machine, means whereby the frequency with which the
rotatory movement of the capstan or turret head is stopped, is varied, substan-
tially as described.
4. In an automatic turning machine, a capstan or turret head, grooves in such
head, a locking pin for engagement with such grooves or any of them as desired,
and a cam or cams adapted to hold such pin clear of engagement with a groove
or grooves, substantially as described.
5. In an automatic turning machine means by which the frequency with which
the rotatory movement of the capstan or turret head is stopped is varied, which

page_text: comprise grooves in such head, a locking pin for engagement with such grooves,
or any of them as desired, a cam or cams adapted to hold such pin clear of
engagement with a groove or grooves, and means by which there may be varied
the relative speeds of rotation of the portions which revolve around the axis
of such head and of a shaft or portion which controls the movement of such cam
or cams, substantially as described.
6. In an automatic turning machine, means by which the frequency with
which the rotatory movement of the capstan or turret head is stopped is varied,
which comprise grooves in such head, a locking pin for engagement with such
grooves or any of them as desired, a cam or cams adapted to hold such pin clear
of engagement with a groove or grooves, and change wheels between the axis
of such head and the axis of a shaft or portion which controls the movement of
such cam or cams, substantially as described.
7. In an automatic turning machine, a tool carrier, for use in sideway cutting,
a striker, carried by such carrier, a spring which normally presses out the head
of the striker, and a cam which as it revolves presses inwards the striker and
thus operates the carrier through the medium of the spring, substantially as
described.
.
8. In an automatic turning machine, a tool carrier for use in sideway cutting,
a striker carried by such carrier a spring which normally presses outwards the
head of the striker, a cam which as it revolves presses inwards the striker and
thus operates the carrier through the medium of the spring, a stop pin to control
the movement of the carrier and an abutment to receive the thrust of the pin,
substantially as described.
9. In an automatic turning machine, a rocking arm, for use in sideway
cutting, formed with a bearing face for a tool holder or holders which constitutes
a portion of a cylindrical surface which is concentric with the axis about which
the arm turns, and a tool holder or holders formed or each formed with a bearing
face which forms a portion of an interior cylindrical surface, and means for
adjustably fixing the holder or each holder upon the portion of the surface of
the arm which constitutes a portion of a cylinder in a manner which allows it
to be adjusted in position circumferentially thereof, substantially as described.
10. In an automatic turning machine, the combination, with means for inter-
mittently stopping the rotatory movement of the capstan head, and means for
automatically moving such head back again after it has been pressed forwards,
of a sleeve cam which surrounds the axis of such head and has its bearing or
operative face formed at its forward end, of a part which is carried
by such head and bears against the bearing or operative face of
the cam,
the said cam operating when the head is held from turn-
ing to press it forwards during a portion of the revolution of the cam, and
a portion of such bearing or operative face of the cam being formed at such an
inclination with the longitudinal axis which the cam surrounds that when the
head is not held from turning by the means provided therefor such portion of
the bearing face of the cam will by pressing against the part which is carried
by the head cause the head to rotate, as its resistance to rotation will be less
than its resistance to being pressed forwards, substantially as described.
11. In an automatic turning machine, the combination, with means by which
the frequency with which the rotatory movement of the capstan or turret head
is stopped is varied, and means for automatically moving such head back again
after it has been pressed forwards, of a sleeve cam which surrounds the axis of
such head and has its bearing or operative face formed at its forward end, of a
part which is carried by such head and bears against the bearing or operative
face of the cam, the said cam operating when the head is held from turning to
press it forwards during a portion of the revolution of the cam, and a portion of
such bearing or operative face of the cam being formed at such inclination or
curvature with the longitudinal axis which the cam surrounds that when the
head is not held from turning by the means provided therefor such portion of the

page_text: bearing face of the cam will, by pressing against the portion carried by the head,
cause the head to rotate, as its resistance to rotation will be less than its
resistance to being pressed forwards, substantially as described.
12. The improved means for use in reciprocating and turning the capstan or
turret head of an automatic turning machine, substantially as described and
shewn.
Dated this 30th day of November 1898.
STEPHEN WATKINS,
Wolverhampton, Agent for the Applicant.