Improvements in Turret Lathes.
Year: 1892

page_text: Date of Application, 31st May, 1892-Accepted, 9th July, 1892
COMPLETE SPECIFICATION.
[Communicated from abroad by FRANK EDWARD MORGAN, of No. 546; Chapel
Street, New Haven, County of New Haven, State of Connecticut, United
States of America, Manufacturer.]
Improvements in Turret Lathes.
I, HENRY HARRIS LAKE of the firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings in the County of Middlesex, 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, reference
being made to the following drawings forming part of this application, and in which
Figure 1, represents a top or plan view of a lathe having the turret attachment
applied thereto.
Figure 1, a plan view of the front portion of the slide showing the mechanism
and operation for arresting the retreating movement of the carriage before it
reaches its extreme point of retreat.
Figure 2, front view of the attachment and lathe complete.
Figure 3, transverse section cutting on line x-x of Fig. 2, but showing the
turret attachment in side view, and representing the turret and carriage" at the
extreme point of retreat.
Figure 3ª, a similar view of the carriage, turret and ratchet as that of Fig. 3,
except the position of the turret and carriage is at that point where the pawl is
just engaging a tooth of the ratchet.
Figure 4, a partial longitudinal section of the front end of the slide showing the
arrangement of the stop 53 adapted to arrest the retreating movement of the
carriage before it shall have reached its extreme retreating position.
Figure 5, side view of a blank of an arbor for clock-pinion as adapted for
introduction to the machine for operation thereon.
Figure 6, the same after the operation of the machine is completed.
Figure 7, top or plan view of the slide with the carriage and turret removed.
Figure 8, under side view of the carriage showing the toothed surface of the
turret-plate r.
Figure 9, transverse section through the turret, cutting on line y-y of Figure 3
near the carriage.
Figure 10, longitudinal section through the forward portion of the slide
representing the plate t of the turret as engaging with the dog 16 in the slide for
the purpose of rotation.
Figure 11, transverse section through the slide, carriage and turret, illustrating
the interlocking mechanism between the turret and carriage.
Figure 12, longitudinal section through the front portion of the carriage, cutting
on line of Fig. 7.
This invention relates to an improvement in a turret attachment fo. lathes for
turning articles of various diameters and shapes, the object being to provide an
attachment for an ordinary lathe which may be readily applied thereto, and by
which, shaping or reducing articles of circular sa .pe in transverse section may be
readily produced, and the invention consists in the construction and combination of
mechanism as hereinafter described and particularly recited in the claim.
In illustrating the invention, it is shown as adapted for turning the arbor and
collets for lantern-pinions for clock-work.
In Figure 5 a blank for such an arbor and pinion is represented, and the finished
article in Fig. 6. The arbor a, is usually made from wire of the required diameter,..
and in length slightly greater than that of the finished article. Upon this arbor

page_text: two collets bc are applied, usually by casting, these collets being somewhat larger
than required for the finished article. In turning the blank to the finished shape,
gudgeons d, are formed on each end of the arbor, and the two collets are reduced
to the required diameter and thickness, the collet b, being somewhat larger than the
collet c, so as to form the hub for the gear-wheel to be attached thereto, and this
collet b, is reduced to form a shoulder e, upon which the gear-wheel is set, the two
collets being distant from each other as required for the formation of the pinion,
the pinion being completed by drilling through the collet e, into the collet b, and
introducing wires to form the leaves of the pinion, this latter operation being
performed in the usual manner.
The machine of this invention is adapted to convert the blank Fig. 5, to the
shape of the finished article, as seen in Fig. 6.
A, represents the bed of the lathe, B, the head-stock in which the mandrel C, is
arranged, and carrying the pulleys D, and E, in the usual manner. F, represents
the tool-stock, which is arranged upon the bed in the usual manner, and as usual is
provided with a spindle G, which is adapted for adjustment longitudinally, so as to
centrally hold the work between its inner end and the mandrel, as usual in this class
of lathes.
The attachment to be applied to the lathe consists of a slide H, arranged
transversely across the bed of the lathe, and so as to slide longitudinally thereon,
in the usual manner of the slide-rest of a lathe, and it is connected to the bed so as
to be held firmly thereon, yet permitted longitudinal sliding movement. As here
represented the slide H, is secured upon the bed A, of the lathe by means of a
binding-plate I, upon the under side of the bed of the lathe, connected to the
slide through the bed by a stud J, or otherwise, so that the slide may be held firmly
in its place upon the top of the bed, yet permitted to move freely toward and from
the head-stock. As here represented, the longitudinal movement is imparted to
the slide H, by means of a hand-lever K, hung upon a fulcrum L at the left hand
end of the lathe, and connected by a rod M to the binding-plate I, the lever being
arranged to swing in a horizontal plane, and so that the operator applying his hand
to the lever K, and moving that lever in such horizontal plane, will impart a corre-
sponding longitudinal movement to the slide H. This movement of the slide is
adapted for quick adjustment or movement of the lathe. In some cases, however,
a regular feed is desirable, as in engine-lathes. To accomplish such regular move-
ment of the slide H, a leading-screw N, is supported in bearings O below the
lathe-bed, and which receives a continuous rotation through a pulley P, arranged
on the leading-screw or otherwise, it being understood that the screw is arranged
for free rotation, but without longitudinal movement, and as usual in lathes provided
with a leading-screw, but that the slide may be moved in either direction, that is,
toward or from the head-stock, a portion Q, of the screw toward one end is cut
with a right hand thread, and at the other end R, the screw is cut with a left-hand
thread. From the slide two stirrups S and T project downward, through which
the leading-screw extends, they being connected to the slide by a spindle U, see
Fig. 3, which extends up into the stud J, where it is provided with a spring V, the
tendency of which is to hold the stirrup in its up position, but so as to yield to a
pressure which will draw the stirrup downward, the two stirrups being of like
construction.
The one stirrup S, carries a half nut W, which is threaded corresponding to the
right-hand screw-threaded portion Q, of the leading-screw N. Normally this half
nut stands above and out of engagement with the screw, as represented in Fig. 3,
so held by the spring V, but yet so that by drawing the stirrup downward, the
nut W, may be brought into engagement with its screw-threaded portion of the
leading-screw N, and so that when so engaged, the leading-screw will impart to
the nut a travel in the direction of the screw, which travel will be communicated
to the slide H.
The other stirrup T, is provided with a like half-nut X, which may be drawn
into engagement with the other threaded portion of the screw, so as to impart to

page_text: the slide a movement in the direction opposite to that which would be imparted to
it by the operation of the screw upon the other nut W, this nut X being held up
out of engagement with its portion of the screw in like manner as described for the
nut W.
To draw these nuts into engagement with their own portion of the leading-
screw N, as may be required, a lever Y, is hung upon a fulcrum Z, at one side of
the stirrup S, the lever extending through the stirrup and over a bearing, or anti-
friction roll f, in the stirrup, and to the free end of the lever a foot-pedal is
connected, as by a chain g, so that the operator by his foot may depress the
stirrup S, and draw the nut W into engagement with its portion of the leading-
screw whenever required.
A similar lever h, is hung upon a fulcrum i, at one side of the stirrup T, and
extends through the stirrup and so as to bear upon an anti-friction roller k, in like
manner as described for the lever Y, in the stirrup S, and it is also in like manner
provided with a connection l, with a foot-pedal, so that the stirrup T; may be drawn
downward to bring its nut X, into engagement with its portion of the screw, as
required, thus by his foot the operator may bring either nut into engagement with
the leading-screw, so as to impart to the slide a corresponding movement toward or
from the head-stock as occasion may require.
Upon the slide H, a carriage m, is arranged, and suitably guided, so as to receive
a reciprocating movement in a line transversely across the bed of the lathe, or at
substantially right angles to the axis of the mandrel and spindle, and as usual in
the slide-rest of lathes.
1
The reciprocating movement is imparted to the carriage m, by means of a hand-
lever n, hung upon a fulcrum o, and so as to swing in substantially a vertical plane.
From the hub of the lever an arm p, extends upward, to which a link q is attached,
and connects the said lever with the slide m, and so that as the lever is moved up
and down, it will impart a corresponding forward and backward movement to the
carriage m. Upon this carriage the turret r, is arranged, and so as to rotate in a
horizontal plane, that is, the axis of rotation of the turret is vertical.
The turret is connected to the carriage, as represented in Fig. 11. The turret
is constructed with a trunnions upon its lower end, which passes through a corre-
sponding seat in the top of the carriage, and upon the under side of the trunnion a
collar t is secured, the collar taking a bearing upon the inside of the carriage
around the trunnion, and so as to hold the trunnion firmly upon the carriage, yet
permit rotation of the turret, the collar t, rotating with it."
The turret is provided with a series of tools as 2, 3, 4, 5, 6, 7, and 8, may
be more or less in number according to the work required, the tools being of the
shape to produce the proper cut upon the article to be operated upon, and are
arranged radially in the turret, and adjusted according to the work to be
accomplished.
The rotation of the turret is such as to present either tool as they may be
required.
The rotation of the turret is made automatic, and is produced in the reciprocating
movement of the carriage.
To produce such rotation of the turret, the collart upon the lower end of the
turret is constructed with ratchet-teeth 9, 10, 11, 12, 13, 14 and 15, upon its under
surface, corresponding in number to the number of tools in the turret. In the
slide H, below the collar t, a vertically movable dog 16, is arranged, see Fig. 10;
this dog is a pin set in a corresponding cavity in the slide H, and rests upon a
spring 17, the tendency of which is to force the dog upward, the nose of the dog
is beveled backward, and so that its forward surface may engage the teeth of the
collar t, represented in Fig. 10 as engaged with the tooth 9. This dog stands near
the forward end of the slide H, but so that as the carriage m retreats, the dog
stands in the path of a tooth of the collar t, and when that tooth is so engaged
with the dog 16, as seen in Fig. 10, the completion of the retreating movement of
the carriage will cause the collar t and the turret to rotate accordingly, that is, to

page_text: the extent of one tooth on the collar t, then on the next advance of the carriage, the
next tooth operating upon the bevel nose of the dog, will cause the dog to descend,
so that the turret may escape therefrom, and then on the next retreat, the tooth
which so passed over the dog will be engaged and the next step in rotation imparted
to the turret. A stop 18 is provided between the slide N, and the carriage, see
Figs. 1 and 2, which limits the retreating movement of the carriage, and so as to
stop it at the point when the required tool is presented for work.
When the turret has been thus properly adjusted, it is necessary to. lock it to the
carriage so as to prevent any accidental rotative movement of the turret in its next
advance. To accomplish this object, the collar t is provided with a series of
pins 19, 20, 21, 22, 23, 24 and 25, corresponding to the number of teeth on the
collar, that is, with the number of tools or steps of rotation required for the turret.
These pins work freely through corresponding holes in the collar, and in length
correspond to the thickness of the collar, as seen in Fig. 11, and so that normally
they work between the under surface of the carriage and the upper surface of the
slide, as shown for the pin 23 in Fig. 11. In the carriage above the collar t, and at
a point corresponding to one of the pins, say 19, when the turret is at rest, a
follower 26 is arranged, see Fig. 11, which is of a size and shape corresponding to
the said pins, and is provided with a pin 27, the tendency of which is to force the
said follower 26, downward, and so that when one of the pins, as 19, is presented
below this follower, as seen in Fig. 11, the said follower under the force of its spring,
will have a tendency to force that pin 19 downward.
In line with the point where such pin, as 19, stands when the turret is at rest, the
slide is constructed with a longitudinal groove 28, see Figs. 7 and 11, which in
width corresponds to the width of the pins in the collar t, and so that when a pin
stands over that groove as seen in Fig. 11, the follower will force that pin downward
into the groove 28, of the slide H, the follower itself entering the upper end of the
hole of the pin which it has thus depressed, and as seen in Fig. 11, the follower
thus engaged with both the collar and the carriage, firmly interlocks the two, so as
to prevent the possible rotation of the turret while thus interlocked. The pin thus
depressed by the follower, works through the groove 28, in the carriage so as to
permit the interlocking to continue during the advance and retreating movement of
the carriage.
In the groove 28, and near the forward end, a stationary rise or cam 29, is formed,
presenting an inclined surface into the groove, and so that as the carriage retreats,
and approaches its rear position, and before the tooth of the collar t, has reached
the dog 16, the pin, as 19, then standing in the groove 28, will ride onto the
stationary cam 29, in the groove, and thus be forced upward, and so as to press the
follower into its recess in the carriage, and out of engagement with the turret, and
so that in the completion of the retreating movement of the carriage from this
disengaged position, the dog 16 will operate as before described, to impart one step
of rotation to the turret, when the next pin will be brought into line with the
follower 26, and so that on the next advance of the carriage, that second pin will
ride off from the cam 29 into the groove, and permit the interlocking as before.
The cam 29, is made of a length only sufficient to hold the follower out of engage-
ment with the turret, while the rotation is being produced, and so that the pin may
pass off from the other side of the cam again into the groove, and so as to make the
engagement with the turret so soon as the rotation has been completed, and so as to
insure the rotation of the turret stopping at the proper point, for so soon as the
next pin of the collar comes below the follower, it will be forced into the groove,
and thus arrest the rotation of the turret, hence on the next advance, the pin will
ride over the cam, but again return into the groove before the turret shall have
been advanced to bring the tool into operation.
The extension of the groove beyond the cam 29, at the outer end, may be omitted,
but is desirable as being a certain means of arresting the rotation of the turret at
the proper point.
To insure the registering position between the pins on the plate t, and the

page_text: follower 26, the turret is constructed with a series of notches 30, corresponding to
the number of tools, as seen in Fig. 9, and combined with these notches is a spring-
dog 31, made fast to the carriage, the nose of which is adapted to engage one of
the said notches when presented thereto, and as seen in Fig. 9, but yet so as to
yield when the forced rotation of the turret commences. The position of these
notches with relation to the nose of the dog, corresponds to the point where the pins
of the plate t, will register with the follower 26, of the carriage, and so that said
dog will temporarily arrest the rotation of the turret when this registering position
is attained, and so as to force the follower into engagement with the turret as before
described.
As a means for stopping the advance movement of the turret whenever the tool
shall have reached its required advanced position, the turret is provided with a series
of stops 32, below the cutters and projecting radially from the turret, and made
adjustable as to length of projection. In the plane of these stops 32, and at the
rear, a stationary stop 33, is arranged, which consists of a longitudinal flange,
secured to a bracket 34, which projects up from the rear of the lathe, see Fig. 3,
and so that as the turret advances, the stop beneath the advancing cutter will strike
the said flange when the full advance of the cutter is completed, the stops 32, being
adjustable to vary the advance of the cutter as occasion may require, these stops
combined with the flangé 33, provide for depth of cut.
In some cases different depths of cut are required to be made by the same cutter,
as, for illustration, the collets b and c are of different diameters, but their surface or
periphery may be produced by the same cutter. To permit such action of the same
cutter, an independent stop, as 35, is provided for that particular cutter in a plane
out of the plane of the stop-flange 33, and in the plane of this stop 35, an independent
stop-flange 36 is provided, see Figs. 1 and 3, this flange 36 presenting à longi-
tudinal surface, but with an offset as at 37, Fig. 1, thus presenting two stop
surfaces according to the variation required for the depth of cut.
This same stop
flange 36, may present any irregularity in its edge, and so as to serve as a guide
for the varying longitudinal movement of the turret, the stop working against the
edge of that flange will vary this backward and forward movement according to the
irregularities of such edge, and consequently produce a cut of corresponding
shape.
To stop the longitudinal movement of the slide H, at the proper positions for the
operation of the tools on the turret, a rotating shaft 38, is arranged in suitable
bearings 39, beneath the slide H, the shaft being parallel with the path of move-
ment of the slide. This shaft carries at its end a ratchet-wheel 40, and on the
carriage a pawl 41, is hung, which is adapted to engage the teeth of this ratchet, as
the carriage retreats, and as seen in Fig. 34, and so that as the carriage completes
its retreat, a partial rotation will be imparted to the ratchet-wheel 40. The ratchet-
wheel 40 carries several longitudinally projecting pins, as 42, 43, 44, 45, 46 and 47,
more or less in number, according to the longitudinal stops required, here represented
as six; these stops rotate with the ratchet-wheel 40, and so that under each
rotation the position of the projecting pins will be changed.
Stationary on the lathe-bed is a stop 48, and this stop stands in the position
corresponding to the path of movement of one of the ribs on the wheel 40, that is,
so that these pins may be successively brought into line with the stop 48, consequently
one of these pins being in line with the stop 48, that pin will come against the
stop 48, when the slide has been moved so far longitudinally as to bring the pin
into contact with the stop. These pins correspond in position to the respective
tools, and so that one tool brought into a position to operate, its pin will be at the
same time brought into line with the stop 48, and so that with that tool working,
and the carriage moved longitudinally, the further operation of that tool will be
arrested when the pin reaches the stop, or the pins may serve to locate the tools
with relation to the work to be done, that is to say, if simply a radial cut is to be
made, then the pin of the particular tool which has to do that work will reach the..

page_text: stop when the position for that tool to operate is reached, and so that the slide
being held thus arrested by the stop 48, the tool may then be advanced to make its
cut. For illustration, the pins for the respective tools will come against the stop 48,
when the tool which is to cut the sides of the respective collets is reached in such
case there is no longitudinal movement during the operation of the tool, it is simply
a depth of cut. Again, in cutting the gudgeon d, there will be a depth of cut which
will be governed by the stop-flanges 33, a corresponding pin will locate the cutter
at the point where the shoulder is to be formed, then a longitudinal movement
therefrom will cut that gudgeon. For the other gudgeon an adjustable stop 49, is
arranged over the flange 33, projecting toward the turret, and against which the
stop on the turret will strike when the slide is moved to bring the tool for cutting
that other gudgeon into the right position for the shoulder, then that tool is
advanced, and moved longitudinally to cut that other gudgeon.
In some cases more than a single operation is required to be produced in a single
tool, as for illustration, the cutting down of the face 50, of the collet e, the cutting
of the surface 51 of the collet b, down to the shoulder e, and then the cutting of the
surface 52, from the shoulder to the arbor, may be produced by the same tool, and
without rotation of the turret, the change of position of the tool longitudinally
being all that is required. To accomplish this object, the rotation of the turret is
prevented by providing a stop which will arrest its retreating movement before the
dog 16, is brought into operation upon the turret. This stop consists of a vertically
movable dog 53, arranged in the slide H, as seen in Fig. 4, the dog being provided
with a spring, the tendency of which is to hold the dog in the down or disengaged
position, but the nose of the dog is adapted to pass up through the upper surface of
the slide, and so as to stand in the path of the retreating carriage, as represented in
broken lines Fig. 4, and which will serve to arrest the retreat of the carriage before
it reaches the stop 18, this point of arrest of the dog 53 occurs before the dog 16
can come into operation.
To bring the dog 53 into operation at the required time, a cam 54 is arranged on
the wheel 40, so as to revolve with it, and upon the under side of the slide H is a
lever 55, arranged to swing in a horizontal plane. One arm of this lever is adapted
to pass below the lower beveled end of the dog 53, and so as to force the dog
upward, as indicated in broken lines Fig. 4, normally however, this end of the lever
stands so far away from the dog 53 as to permit that dog to stand in the down
position. The other arm of the lever extends into the path of the cam 54, as seen
in Fig. 1^, and so that as the cam 54, advances under the rotation of the ratchet-
wheel 40, it will strike the projecting arm of the lever 55, and turn that arm
outward, as seen in broken lines Fig. 1A, and so as to bring the other arm of the
lever onto the beveled end of the dog 53, and correspondingly force that dog
upward, as before described, that its upper end may stand in the path of the
retreating carriage to arrest it as before described, and so long as the cam thus
holds the lever with the dog raised, the reciprocating movement of the carriage
and turret may continue without producing rotation of the turret, the length of this
cam is therefore made according to the number of reciprocating movements which
it is desired the carriage and turret should receive without change of tool. So
soon as the lever escapes from the cam, the dog 53, drops and leaves the carriage
free to resume its full movement by which rotation will be imparted to the turret.
The rotation of the ratchet-wheel continues notwithstanding there is no rotation
of the turret, for the reason that the extent of movement of the tool for each
operation is varied, and therefore requires an independent pin for each movement.
As the pawl 41, which operates the ratchet necessarily moves with the carriage,
and because of the stopping of the carriage before the extreme rear position is
reached, as before described, it is necessary that the dog should escape from the
ratchet-wheel before the extreme retreat of the carriage is reached, otherwise the
dog being engaged with the wheel 40, would turn the wheel to a greater extent
when the carriage made its full retreat than when it was stopped prior to such

page_text: extreme rear position. Therefore to produce the proper action of the pawl upon
the ratchet, it is thrown out of engagement with the ratchet so soon as the required
movement of the ratchet is made. To thus throw out the pawl, a finger 56,
represented in broken lines Fig. 3, is attached to the pawl, and is adapted to ride
upon the shaft 38; thus riding upon the shaft, the pawl is out of engagement with
the ratchet, as seen in Fig. 3, but when the carriage advances, the finger escapes
from the shaft and drops, as seen in Fig. 3A, so as to bring the pawl into engage-
ment with the ratchet, that on the next retreat of the carriage it will impart a step
in rotation to the wheel 40, and so soon as that rotation is accomplished, the back
of the finger strikes the shaft 38, and operates as a cam to throw the pawl 41 out
of engagement with the wheel, and leave it free to retreat with the carriage without
effect upon the ratchet wheel 40, as seen in Fig. 3, but this escape of the pawl from
the wheel must occur on or before the carriage will reach the position to be stopped
by the dog 53.
As the article is placed in the lathe for turning, such for illustration as the arbor
represented in Fig. 5, it is a common practice in hand operation, for the workman
to place the end of his tool beneath the arbor or article, and using his tool as a
lever over the rest, bear upward upon the article while it is revolving rapidly,
which will bring the article to a true and central line. This "truing up" is as
desirable in a lathe with the turret attachment as when the work is to be performed
by hand.
To provide a means for thus "truing up" the work, a sliding-finger 57, is
arranged at the rear of the mandrel and spindle, and so as to move in a line at
right angles to the axis of the article to be operated upon. A forward and back
movement is imparted to this finger by means of a hand-lever 58, hung upon a
fulcrum 59 below, and connected to the finger at its rear end, and so that by pulling
the lever forward, the finger will be advanced, or forcing the lever backward, the
finger will correspondingly retreat. The finger works through a post 60, and at
its forward end the upper side is inclined upward and rearward, and so that as the
finger advances, it will pass under the article in the lathe to be operated upon, that
article revolving, and so that the inclined surface will produce an upward force upon
the revolving article, substantially the same as does the lever like action of the tool
in the hand of the operator as before described, and as represented in broken
lines Fig. 3. The elevation of this finger may be adjusted with relation to the
diameter of the article in the lathe, and this may be accomplished by raising or
lowering the stud 61, which stands beneath the finger, and over which the finger
moves.
The illustration of the invention as adapted for turning clock-arbors will be
sufficient to enable others skilled in the art to adjust the lathe for various purposes
to which it is adapted.
While preferring the mechanism hereinbefore described for imparting to the
turret its rotative movement, it will be understood that any of the known mechanisms
for performing this operation may be substituted therefor, the invention is not
therefore to be understood as limited to any specific mechanism for imparting the
intermittent rotation to the turret, but what is claimed is :-
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is :-
First. As an attachment for a lathe, the slide, arranged on the bed, and adapted
for longitudinal movement thereon, the carriage on said slide arranged for recipro-
cating movement in a path at right angles to the path of movement of said slide, a
turret on said carriage, adapted to rotate upon a vertical axis, mechanism substan-
tially such as described between the said slide and turret, whereby under the
reciprocating movement of the carriage and turret, a rotative movement will be
imparted to the turret during the last part of its retreating movement, a ratchet-

page_text: wheel arranged upon said slide, and in a plane parallel with the path of movement
of said carriage, a pawl on said carriage, adapted to engage the teeth of said ratchet,
the said wheel provided with a series of pins projecting longitudinally therefrom,
and a stationary stop against which said pins are adapted to successively bear to
arrest the longitudinal movement of the slide, substantially as described.
Second. As an attachment for lathes, the combination of a slide H, arranged to
move longitudinally on the bed of the lathe, a carriage m, arranged upon said slide
to reciprocate in a path at right angles to the path of movement of said slide,
mechanism substantially such as described to impart rotation to said turret during
the last part of the retreating movement of the carriage, a stop upon the slide
adapted to arrest the movement of the carriage at its extreme retreating position,
and a dog as 53, arranged in the slide, and adapted to be brought into position to
arrest the carriage before it reaches its extreme rear movement, a ratchet-wheel 40,
supported in said slide and so as to move therewith, a pawl on the carriage arranged
to engage the said ratchet in the retreating movement of the carriage, the said
ratchet wheel provided with a series of pins projecting longitudinally therefrom,
and corresponding to more or less of the tools in the turret, with a stop against
which said pins are adapted to bear at a predetermined point in the longitudinal
movement of said slide, a lever 55, adapted to operate upon said dog 53, with a
cam 54, on said ratchet-wheel, arranged to engage the said lever 55, at a
predetermined point, and for a predetermined length of time, substantially as
described.
Third. As an attachment for a lathe, the combination of a slide, arranged on the
bed of the lathe and so as to be moved longitudinally thereon, a carriage arranged
on said slide, and so as to reciprocate in a path at right angles to the path of
movement of said slide, a turret on said carriage, and adapted to rotate upon a
vertical axis, mechanism between the said slide and turret, whereby under the
reciprocating movement of the carriage a rotative movement is imparted to the turret
during the last part of the retreating movement of the carriage, the turret provided
with a series of tools, and also provided with a series of stops corresponding to said
tools, with a stop flange at the rear against which said stops are adapted to bear
to govern the advancing movement of the carriage and turret, substantially as
described.
Fourth. As an attachment for a lathe, the combination of a slide arranged upon
the bed of the lathe and so as to be moved longitudinally thereon, a carriage
arranged upon said slide, and so as to reciprocate in a path at right angles to the
path of movement of the said slide, a turret arranged upon said carriage upon a
vertical axis, and so as to rotate thereon, mechanism between said slide and turret,
whereby rotative movement will be imparted to said turret during the last part of
the retreating movement of said carriage, a finger arranged at the rear, and so as
to slide backward and forward toward the turret, mechanism substantially such as
described to impart said sliding movement to said finger, the said finger constructed
with an upward and rearwardly inclined surface at its forward end, substantially as
and for the purpose described.
Fifth. In a turret attachment for lathes, the combination of the slide H, arranged
upon the bed of the lathe and so as to move longitudinally thereon, a carriage m,
arranged upon said slide, and so as to reciprocate in a path at right angles to
the path of movement of said slide, a turret arranged upon said carriage, and
so as to rotate upon a vertical axis thereon, the turret carrying a series of tools,
mechanism between the slide and turret, whereby a rotative movement is imparted
to said turret during the last part of the retreating movement of said turret, a
leading-screw N, arranged below but parallel with the path of said slide, said
screw having a portion of its thread right hand and another portion of its thread
left hand, stirrups S and T hung to said slide, and carrying respectively half
nuts W and R, adapted to engage the corresponding threaded portions of said
screw, with mechanism substantially such as described to draw said nuts into and

page_text: take them out of engagement with their respective portions of the screw,
tially as described.
Dated this 31st day of May 1892.
substan-
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.