Improvements in Turret Lathes.
Year: 1899

page_text: Date of Application, 18th Apr., 1899-Accepted, 20th May, 1899
[Communicated from abroad by THE LAVIGNE AUTOMATIC MANUFACTURING COM-
PANY, a corporation organized under the laws of the State of New Jersey,
and having its place of business at Paterson, in the County of l'assaic, in
said State of New Jersey, United States of America, Manufacturers.]
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:-
:―
This invention relates to turret lathes and is an improvement upon this inven-
tion described in the Specification of former Patent No. 3591 of 1898.
The invention is illustrated in the accompanying drawings in which:-
Figure represents a broken view in side elevation of the rear end of a turret-
lathe containing the invention.
:-
Figure 2 a view in vertical longitudinal section through the turret, the turret-
slide and turret-slide holder, showing the instrumentalities employed for rota-
ting the turret, for frictionally clamping it in its operating positions, and for
actuating the locking-bar by which it is positively locked in those positions.
Figure 3 a similar view showing the turret clamped and locked.
Figure 4 a detached plan view of the star-wheel by means of which rotary
movement is communicated to the turret.
Figure 5 a detached view in side elevation of the clamping cam by means
of which the turret is frictionally clamped in its operating positions.
Figure 6 a view partly in plan and partly in horizontal section on the line A-B
of Figure 3.
Figure 7a broken plan view of the slide-holder designed in particular to show
the recess formed therein for co-action with the clamping-cam.
Figure 8 a sectional plan view of the coupling-washer.
This invention relates to an improvement in the turret-lathe described in the
Specification of the said former Patent, the object of the present invention being
to simplify and improve the device disclosed in the said application.
With these ends in view, the invention consists in certain details of con-
struction and combinations of parts as will be hereinafter described and pointed
out in the claims.
act
In carrying out the invention a large cam-drum 1 is employed, provided upon
its periphery with a suitable number of adjustable cams 2, designed to co-
with an anti-friction roll 3, located upon the lower end of a heavy
operating stud 4, the upper end of which is reduced in diameter, and
threaded and entered into the slide 5 upon which the turret 6 is mounted,
and which carries the various instrumentalities co-acting therewith. The action
of the cams 1 upon the roll 3 provides for the reciprocation of the slide and
hence the turret back and forth upon the bed 7 of the machine.

page_text: For the rotation of the turret the cam-drum 1 is provided with operating-
pins S, set into its outer edge, and arranged far apart or in groups according to
the manner in whicli it is desired to have the turret rotate. It will be under-
stood of course, that the operating-pins 8 correspond in number to the tool-
receiving holes 9 of the turret which is generally formed with four of such holes.
These pins co-act with a star-wheel 10, which will have as many operating-
arms 11 as the turret has holes 9, and as the cam-drum has pins S. This star-
wheel is located at the lower end of a sleeve 12, through which the heavy opera-
ting-stud 4 passes. The upper end of the said sleeve 12 is formed with a driving-
pinion 13, which meshes into a driven pinion 14, located at the lower end of a
long sleeve 15, which extends upward through the turret, and is reduced at its
upper end and threaded to form a hub 16, which receive a coupling-disk 17 and
a check-nut 18. The said coupling-disk, (Figure 8) is formed at opposite points
in its periphery with notches 19, receiving the upper ends of coupling-pins 20.
20, which are set into the upper face of the turret. It is through the medium
of these pins that the coupling-disk 17 is connected with the turret, which is
thus rotated by the pinions and star-wheel described. The character of the con-
nection between the coupling-disk and turret however, is such that the disk is
allowed a little vertical play without breaking its connection with the turret. In
the revolution of the cam-drum 1, the pins 8 successively engage with the arms 11
of the star-wheel 10, which acts through the driving-pinion 13, and the driven-
pinion 14 to rotate the turret at longer or shorter intervals according to the
separation of the pins. As herein shown, each pin will cause it to be rotated
through an arc of 90 degrees.
It will be understood, of course, that the number of pins 8 employed in the
cam-drum will be determined by the number of tool-holes in the turret, while the
distances between the pins will be regulated in accordance with the intervals
which it is desired to have elapse between the presentation of the tools carried
by the turret. The speed of the cam-drum will of course remain constant and
the regulation of the operation of the turret will be affected so as to reduce the
loss of time to the minimum by shifting the positions of the pins upon the drum.
It will be desirable in some cases to rotate the turret through half a turn, or
through three-quarters of a turn, and for this purpose the cam-drum 1 is pro-
vided with a movable back 21, formed with three pin-holes 22, in which three
of the pins 8 may be placed. Then this block is set in a certain relation to the
remaining-pin, whereby the arms of the star-wheel are engaged in rapid succes-
sion, so as turn the turret rapidly.
For the purpose of frictionally clamping the turret very firmly in each of the
positions into which it is turned, through the action of the instrumentalities
described, it is provided with a clamping-rod 23 which extends upward through
the sleeve 15 before mentioned, the said rod being threaded at its upper end
for the reception of a heavy cup-shaped clamping-nut or disk 24, which is held
securely in place upon the rod by means of a nut 25, The said nut or disk 24
being adapted in diameter to engage with the upper face of the turret at points
outside of the coupling-pins 20 before mentioned. It may here be noted that
the turret itself revolves upon a heavy hollow stud 26, formed at its upper end
with a taper 27, and having its lower end threaded for being screwed into the
the slide 5. The lower end of the said clamping-rod is furnished with
wide flat clamping-cam 28, pivotally hung from a pin 29 through the
upper end of the cam, and through an eye formed at the lower end of
the rod, the said cam being furnished at opposite points upon its lower
end with two stud-like projections 30, 30. This cam is located partly
within a recess formed in the lower face of the slide 5, and partly within a
recess 32 formed in the slide-holder 33. Within the lower portion of the recess 32
a wide flat horizontal stationary cam or stop 34 is formed, which is in fact a
portion of the slide-holder. The said clamping-cam is formed with a cam-face 35,
a

page_text: which works against a steel washer 36, set into the lower face of the driven-
pinion 14.
When the slide 5 is moved forward, the lower end of the clamping-
cam engages with the rounded outer end of the stationary cam 34, and swung
on its pin 29 into the position in which it is shewn in Figure 3, whereby its cam-
surface 35 coacts with the wearing-washer 36 and draws the clamping-rod 23
downward, with the effect of drawing or biting the clamping-nut or disk 24 into
the upper end of the turret, which is thus forced downward so as to bring its
lower face into solid bearing with the upper face of the slide. The turret is
thus firmly locked against the slightest swerving, the accurate performance of
the tools being thereby insured. On the other hand, when the slide moves rear-
ward or outward, carrying the turret with it, the extensions 30, 30 of the pivotal
cam 28, engage with fixed vertical cams 37, 37 formed in the slide-holder, where-
by the clamping-cam is turned back into the position in which it is shown in
Figure 2.
The frictional clamping or locking of the turret by the automatic action of
the instrumentalities just above described, is supplemental to the positive lock-
ing of the turret, which is affected by means of a reciprocating locking-bar 38,
the forward end of which is slightly tapered to adapt it to be entered into lock-
ing notches or slots 39 formed in a locking ring 40, the upper edge of which
is set into the lower face of the turret, as clearly shown in Figure 2. This lock-
ing bar is constantly urged forward toward the turret by the action of a spiral-
spring 41, surrounding a pin 42, the forward end of the said spring and pin
being inserted into a suitable socket 43 formed in the rear of the bar, while the
remaining portions of the spring and pin are located within a slot 44, formed
in the extreme rear end of the slide, as shown in Figure 2. The said locking-
bar is retracted against the force of the said spring by means of a retracting-
dog 45, hung upon a pin 46, supported at its ends in the ears 47 of a bracket-like
plate 48, secured by screws 49 to the lower face of the slide. The upper end
of the said dog is ball-shaped, and enters a slot or opening 50 formed in the
locking-bar while the lower end of the said slide is tapered to form a nose which
co-acts with the rounded upper face of an operating-block 51, which is located
in a small chamber 52 formed in the slide holder 33, and mounted so as to be
adjusted back and forth, upon a horizontally arranged screw 53, mounted in the
said holder, as shown in Figure 2. In the outward or rearward movement of
the slide and turret, the lower end of the dog engages the rounded upper face
of the block 51, which acts as a fulcrum for tilting the dog, whereby its upper
end is thrown outward with the effect of retracting the locking bar 38 and com-
pressing the spring 41 thereof. The forward end of the locking-bar is thus
virtually disengaged from the locking-ring 40 of the turret. On the other hand
when the slide moves forward, the locking dog moves forward with it, away from
the block 51, from which the dog is entirely cleared, as shown in Figure 3 when
the turret is locked by the locking-bar. The other details of construction may
follow those of the before mentioned application or not as desired, and they do
not need to be described here.
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 correspondents, I declare that what I claim is :-
1. In a turret lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted, a slide holder in which the slide is mounted, a star-
wheel located below the slide-holder and connected with the turret, and cam-
drum co-acting with the star-wheel for imparting intermittent rotary movement
to the turret when the slide is at rest.
2. In a turret-lathe the combination with the turret thereof, of a slide upon
which the turret is mounted, a slide-holder in which the slide is mounted, a
sleeve passing through the turret, means for coupling the upper end of the sleeve

page_text: with the upper face of the turret, a star-wheel located below the slide-holder,
means for connecting the star-wheel with the lower end of the said sleeve, and
mcans for intermittently actuating the said star-wheel and hence the turret at
a time when the slide is at rest.
rest.
3. In a turret-lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted and by which it is moved back and forth, a slide-
holder in which the slide is mounted, a sleeve passing through the turret, means
for coupling the sleeve with the turret, a driven-pinion located at the lower end
or the said sleeve, a driving-pinion meshing into the said driven-pinion, a star-
wheel below the said slide-holder and connected with the said driving-pinion
and means for co-acting with the said star-wheel for imparting intermittent
rotary movement thereto and hence to the turret at a time when the slide is at
4. In a turret-lathe, the combination with the turret thereof, of a slide, a
turret-stud mounted in the slide and formed at its upper end with a bevel upon
which the turret rotates with respect to the stud, a sleeve passing upward through
the said stud, means for couping the upper end of the sleeve with the turret, a
driven pinion located at the lower end of the said sleeve, a driving-pinion mesh-
ing into the said driven pinion, a star-wheel connected with the said driving-
pinion, and means for imparting intermittent actuation to the said star-wheel.
5. In a turret-lathe, the combination with the turret thereof, of a slide and a
slide-holder, a sleeve passing upward through the turret and coupled therewith,
a driven pinion located at the lower end of the said sleeve, a driving pinion
meshing into the said driven pinion, and located at the upper end of a sleeve
which extends downward through the said slide-holder, a star-wheel located at
the lower end of the sleeve last mentioned and therefore below the said slide-
holder, and means for actuating the star-wheel in intermittent rotation when
the slide is at rest.
6. In a turret-lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted and by which it is moved back and forth, a slide-
holder in which the slide is mounted, a turret-stud mounted in the slide and
adapted for the rotation of the turret upon it, a sleeve passing upward through
the said stud and turret, and adapted to have slight vertical movement indepen-
dently thereof, means for actuating the said sleeve in intermittent rotation within
the stud which is fixed, an independently formed coupling-disk secured to the
upper end of the sleeve, means for loosely coupling the said disk, with the turret
to permit the disk to move vertically with the said sleeve without being un-
coupled from the turret, a clamping-rod extending through the sleeve, means for
connecting the upper end of the rod with the upper face of the turret at points
outside of the said coupling-disk, and means connected with the lower end of the
rod which projects downward through the sleeve for drawing the rod downward
so as to clamp the turret in its working position.
7. In a turret lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted, a clamping-rod passing upward through the turret,
means for connecting the upper end of the said rod with the turret, a clamping
cam pivotally connected with the lower end of the said rod from which it
depends so as to swing in a vertical plane, and cams or surfaces for coacting with
the said clamping-cam which is brought into engagement with them as turret
is moved back and forth with the slide.
8. In a turret-lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted, a clamping-rod extending upward through the
turret, means for connecting the upper end of the rod with the turret, a pivotal
clamping-cam suspended from the lower end of the said clamping-rod, a hardened
washer rotating with the turret and located directly above the upper end of the
said cam which bears against it, and surfaces for co-acting with the said cam
as the slide moves back and forth, whereby the cam acts to draw the rod down-
ward and automatically clamp the turret in its operating positions.

page_text: 9. In a turret-lathe, the combination with the turret thereof, of a slide upon
which the turret is mounted a slide-holder, a turret-stud mounted in the said
slide and adapted for the rotation of the turret upon it, a sleeve passing upward
through the said stud and turret, means for coupling the upper end of the sleeve
with the turret, a driven pinion located at the lower end of the said sleeve means
for imparting intermittent rotary motion to the said pinion and hence the sleeve
and turret, a clamping-rod passing upward through the said sleeve, means for
connecting the upper end of the said rod with the turret which is rotated under
the said means, and automatic mechanism connected with the lower end of the
clamping-rod for intermittently drawing the same downward so as to bring the
clamping instrumentalities at its upper end into co-action with the turret for
frictionally clamping the same in its operating positions.
Dated this 18th day of April 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.