Improvements in Lathes for Turning Wood, Stone, and other Material.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Lathes for Turning Wood, Stone, and other
Material.
I, SAMUEL NELSON GOLDY, a citizen of the United States of America, residing
at 334 West Forty-second Street, in the City, County, and State of New York,
Mechanical 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 :-
The invention relates to improvements in wood-turning machinery; and it
consists in the novel features of construction and combinations of parts hereinafter
described and pointed out in the claims.
The invention may be divided into four principal parts, namely: First, the
rocking bed, which carries a cutter-arbor, and the mechanism for producing the
rocking motion of the bed; Second, the two carriers, each provided with four
centers and devices for holding the work to be turned, and mechanism by which the
work is revolved and turned round, oval, or polygonal; Third, the mechanism for
feeding the carriers to the cutters, and for automatically reversing the carriers and
stopping the work; and, Fourth, the cutter-arbor, the cutters, and devices for
holding the cutters.
Figure 1 of the drawing is a side elevation of my improved wood-turning
machine.
Figure 2 is a plan view of the same, the rear carrier being removed.
Figure 3 is a front end elevation of the machine.
Figure 4 is an enlarged side elevation of a portion of the machine, showing the
automatic reversing and stopping mechanisms.
Figure 5 is a front elevation of the same.
Figure 6 is an enlarged sectional view of one of the spindles of the cutter arbor,
and its bearing.
Figure 7 is a transverse sectional view of said bearing taken on the line x-x of
Figure 6.
Figure 8 is a side elevation of a portion of the carrier-shaft, showing the head
and tail stocks mounted thereon.
Figure 9 is an end elevation of the head-stock.
Figure 10 is a like view of the tail-stock, showing the cam-levers thereon.
Figures 11 and 12 show respectively a front and a side elevation of the chuck for
holding the wood to be turned.
Figure 13, illustrates the arrangement of the grooves in the cam-levers.
Figures 14, 15, and 16 are detail views of the shifting eccentric.
Figure 17 is a detail view of the bushed-bearing for one end of the carrier-
shaft.
Referring to the drawings, A represents the machine-table, mounted upon suitable
legs a.
Across the ends of the table and secured to the face of the same by bolts or other
means are guide-plates 1, 1. These plates extend slightly beyond the edge of the
table and are a sufficient distance apart to admit of work-carriers B B sliding
neatly between them. These carriers (two in number,) and their connections are
identical in every particular.
Mounted in bearings 2 at each end of the carrier is the carrier-shaft C, upon the
forward end of which is rigidly secured the head-stock D. The head-stock D
consists of a head-plate 3, upon the front face of which are secured bearings 4 for
the reception of short tubular shafts 5. Upon the inner ends of these shafts 5,

page_text: (which are four in number) are secured chucks E, while their outer ends carry
gear-wheels 6. An intermediate gear-wheel, 7, carried by a short shaft, 8, also
mounted in a bearing 4, secured to the front face of the head-plate 3, (which shaft
is headed upon its inner end to prevent displacement,) meshes with the two gear-
wheels 6 on the same side of the head stock. Cast integral with each gear-wheel 7
is one half of a clutch, 9, for a purpose that will hercinafter appear.
Chucks E consist of a body portion, 10, through a groove in the face of which
slide jaws 11. Upon the inner edge of each jaw is formed a lug, 12, projecting at
an acute angle. Rods 13 pass through the tubular shafts 5 and into the chucks E,
where they are provided with cone-shaped heads 14, said heads being recessed as
at 15, for the reception of the lugs 12, as seen in Figure 8. Jaws 16, made adjust-
able by means of a slot, 17, (see Fig. 11,) are secured to the sliding jaws 11 by
means of screws 18 passed through the slots and taking into the sliding jaws. The
meeting edges of the two jaws are corrugated to insure the adjustable jaws against
slipping.
The tail-stock F, splined upon the carrier-shaft C, is adapted to slide thereon to
accommodate the length of the stick to be turned. This sliding motion is accom-
plished by means of a screw-threaded rod, 19, which is partly imbedded in a groove
formed in the periphery of the carrier-shaft C, and is prevented from lengthwise
movement by a shoulder or collar 20 upon one end, which fits within a suitable
recess in the head-plate 3 of the head-stock. This rod passes through a suitable
nut or screw-threaded opening within the tail-stock, and through one of the
bearings 2, which is bushed for its reception, as seen in Fig. 17, the outer end of
the rod being fitted for a wrench.
The tail-stock consists of a plate, 21, upon the inner face of which are secured
bearings 22 for the reception of the spur-stocks 23, in the ends of which are formed
recesses to receive the spurs 24. The opposite ends of the spur-stocks 23 pass
through the plate 21 and have a flange, 25, formed around their outer edge.
Cain-levers 26, secured to the outer face of the plate 21 by means of screws 27,
have T-shaped cam-grooves 28 around a portion of their inner face for the reception
of the flanged ends of the spur-stocks 23.
Through suitable openings in the head and tail stocks pass four small rods, 29,
their forward ends, after passing through the head-stock, being bent at right angles,
as at 30, and secured to the ends of the rods 13. Clamps 31, secured in any desired
position upon rods 29 by means of set-screws, have projecting lngs 32, each of which
takes into a cam-groove, 33, formed in the peripheries of the cam-levers.
Mounted in suitable bearings 34, projecting from the front ends of the carriers B B,
is the drive-shaft G, which carries the drive-pulleys 35. This shaft is grooved
longitudinally, and is prevented from moving laterally by the grooved bearing 36,
secured to the table of the machine, as clearly seen in Fig. 3. Bearings 34 are
bifurcated upon their outer ends; and upon drive shaft G and in this bifurcated
portion are screw-gears 37, said gears sliding on the shaft as the carriers are
moved, but are prevented from turning thereon by a feather entering the groove
in the shaft.
Meshing with the gears 37 are large screw-gears 38, carried by shafts 39, mounted
in suitable bearings 40 on the upper portion of the carriers. On the inner end of
each shaft 39 is splined a half-clutch, 41, designed to engage with the half-clutches 9
secured to the gear-wheels 7 of the head-stock.
Midway between the carrier-shafts C C, and parallel with the same, is the cutter-
arbor H, supported at each end in bearings 42, said bearings being supported by
upwardly-projecting arms secured to the rocking bed, I. This rocking bed has for
its bearings a convex rack-bar, 43, upon each end, the teeth of which mesh with
the teeth of rack-bars 44, secured to the machine-table.
On arbor H, at suitable intervals, are detachably secured, by means of set-
screws 451, flanges or collars 45, in the peripheries of which are cut grooves 46, into
which slides the cutter-holder 47, which is secured therein by means of set-screws 48.
The holder is set spirally with relation to the axis of the cutter-arbor, so that the

page_text: cutter will make a shearing cut. In the cutter-holder, along its whole length is a
groove, 49, one side of which groove is corrugated to prevent the cutters from
Hying out. The cutters 50 may be formed in short lengths and of different designs,
so as to be more readily adapted to different styles of work. They may also be
made of a single piece of metal; or the blade may be made separately and dove-
tailed upon the shank, as shown in Fig. 3. The shank of the cutter is corrugated
to correspond with the corrugations in the cutter-holder, and is held therein by
means of a set-screw 51, which bears against a metal backing-plate, 52, placed
behind the cutter. This backing-plate may have a rubber facing upon one side to
correct any slight unevenness there may be in the cutter. If desired, the corrugations
on the cutter-shank and in the cutter-holder may be of a given distance apart―say
one-tenth of an inch-and numbered respectively 1, 2, 3, 4, &c., which arrangement
will greatly facilitate the setting up of different designs. Arbor H carries a band-
pulley, h, upon each end, around either of which may be passed a belt leading from
any suitable source of power for revolving the arbor.
As the cutter-arbor must attain to a very high speed, the bearings must be kept
well oiled to prevent overheating. To accomplish this I have provided the means
shown in Figs. 6 and 7. In each end of the arbor, which is hollow, is fitted 'oue
end of a steel tube, 53, which forms the spindle for the arbor. The outer end of
this tube is closed by a screw-cap, 54, while its inner end may be closed by a screw-
plug 55, thus forming an oil-reservoir within the tube. If desired, screw-plug 55
may be removed, and the whole arbor made to serve as an oil-reservoir. A small
screw-tap, 54, in the screw-cap 54 is for the purpose of refilling the reservoir when
necessary. The oil flows from the reservoir onto the bearing 42 through perfora-
tions 56 in the tube 53, any waste oil being received by a chamber, 57, formed in
the lower part of the bearing 42. If desired, this chamber may be filled with a
wick or waste to absorb the oil and assist in lubricating the bearing. In order to
regulate the flow of the oil through the perforations 56, a thin tube 58, having
perforations 59, which register with the perforations 56 in tube 53, is placed within
the tube 53, so that a slight turn of the inner tube will partially close the
perforations 56, and thus decrease the flow of oil; or the flow may be stopped
entirely.
Mounted on the center of drive-shaft G are different-sized sprocket-wheel 60,
(five in number,) having, respectively, 20, 25, 30, 35, and 40 teeth each. A
sprocket-chain, 61, passes around one of these wheels, and down around one of a set
of three sprocket-wheels, 62, secured on a shaft, 63, mounted in bearings 64, secured
to a cross-bar of the machine-table. These wheels have, respectively, 20, 40,
and 80 teeth cach, and are secured to the shaft 63, by means of a set-screw 65, in
order that they may be shifted into alignment with wheels 60 when it is desired to
shift the chain 61 from one wheel to another.
Upon one end of shaft 63 is secured an eccentric, J, which connects with one end
of a lever 66, which is pivoted in its center as at 67 to a downwardly-hanging
arm, 68, secured to the table of the machine. To the free end of the lever is
connected one end of a rod 69, the other end of which rod is pivoted to an outwardly-
projecting arm, 70, secured to the rocking bed I. It will be seen that, through the
medium of the lever 66 and its connections, the turning of the eccentric causes bed I
to rock back and forth.
For a reason that will hereinafter appear, it is necessary that the eccentric
should at certain times have a greater throw than at others. To produce such
result I have provided a shifting eccentric, which is shown in detail in Figs. 14, 15,
and 16. The eccentric consists of a metal disk, 71, surrounded by the ordinary
eccentric-strap 72. Through the middle portion of the eccentric, and extending to
within a short distance of the periphery on either side, is a slot, 73, which is wider
upon the outer face of the eccentric than upon the inner face, thereby forming
ledges 74, as seen in Fig. 16. At each end of this slot, and consequently
diametrically opposite each other, are formed outwardly-projecting lugs 75.

page_text: A
Perforations through these lugs are for a purpose that will hereinafter appear.
slide, 76, having flanges formed along the upper edge of two opposite sides is
adapted to slide in the slot 73, the flanges on the slide resting upon the ledges of
the slot, the slide being held therein by means of two metal holding-plates, 77,
overlapping the edges of the same and secured to the outer face of the eccentric by
means of screws or bolts. Upon the outer face of the slide 76 are cast two
projecting lugs, 78, of sufficient width to neatly slide between the plates 77; and
secured to each of these lugs in any suitable manner is a screw-threaded rod, 79,
which passes through the perforation in the lug 75, and has a nut, 80, upon its free
end, which bears against the outer face of the lug 75. To decrease or increase the
throw of the eccentric, it is simply necessary to simultaneously loosen one nut 80
and tighten the other, when through the medium of the slide 76 the center of the
eccentric will be moved to or from the center of the shaft, as will be readily
understood.
The carriers B are fed to the cutters by means of hand-wheels 81, secured on the
outer ends of shafts, 82, (only one of each being shown) running horizontally
beneath the face of the machine-table. On this shaft are secured two gear-wheele 83,
which mesh with rack-bars 84 secured to the under side of the carriers. Upon the
inner end of shaft 82 is secured a beveled gear, 85, which meshes with a similar
gear, 86, secured on a horizontal shaft, 87, running beneath the face of the machine-
table at right angles to shaft 82.
Motion is imparted to shaft 87 through the medium of a belt passed around a
pulley 88, secured on its outer end, and thence around one of the pulleys 35 on the
drive-shaft G, as seen in Fig. 3. The beveled gear 86 is loose on its shaft, and
carries a half-clutch 89. The other portion, 90, of the clutch is splined upon
shaft 87, and is thrown into engagement with the portion 89, as will be hereinafter
described, by means of a spring, 91, surrounding the shaft and interposed between
the half-clutch 90 and the frame of the machine.
When the carriers have been fed forward as far as necessary for the requirements
of the work, the revolutions of the work are automatically stopped and the carriers
returned to their normal positions by the mechanisms shown on an enlarged scale in
Figs. 4 and 5.
On the shaft 39, adjacent to the half-clutch 41, is secured a small gear-wheel, 92,
which meshes with a slightly larger gear, 93, journaled upon a lug, 931, screwed
into the upper end of a slide, 94, held in position between guide-plates 95 secured
to the rear face of the carrier. The lower end of this slide carries a beveled
shoe, 96, with which a latch, 97, engages, and when in engagement holds gears 92
and 93 apart against the pressure of a small spiral spring, 98, which bears against
the lower face of the shoe. Latch 97 slides in keepers 971 secured to the carrier,
and is held in its forward position by a spiral spring, 99, which surrounds a portion
of the latch and is interposed between one of said keepers and an adjustable
collar, 99¹, secured on the latch. Adjustably secured to the outer end of the latch by
means of a set-screw is a downwardly-hanging stop 100, having an adjusting-
screw, 101, in its lower end, which screw is designed to strike the outer end of
guide-plate 1 when the carrier has been fed forward the required distance.
Pivoted to a lug on the rear face of the carrier is a bell-crank lever 102, the
upwardly-extending arm of which engages a groove in the periphery of the half-
clutch 41, while its horizontal arm is connected by a link, 103, to a lever L, pivoted
to a stud 104, projecting from the carrier. A spring-catch, 105, pivoted to the
lever L, projects downwardly through a slot 106, in the bottom of the carrier, and
is held in engagement with the edge of the slot by the pressure of a leaf-spring, 107.
This catch holds lever L down against the upward pressure of a leaf-spring, 108,
which bears against the outer end of the horizontal arm of the bell-crank lever 102.
An adjusting-screw, 109, tapped through the end of the machine-table in alignment
with the spring-catch 105, serves to release said catch on the return of the carriage,
for a purpose which will be more fully hereinafter described.

page_text: A pin, 110, secured upon the outer end of the horizontal arm of the bell-crank
lever 102, contacts with one end of a short lever, 111, pivoted in its center to an
upright, 112, rising from the base of the carrier, its outer end being notched, the
notch resting upon the side of the shoe 96 upon the lower end of slide 94.
Upon the outer face of gear-wheel 93 is secured a dog, 113, the beveled end of
which projects beyond the periphery of said gear-wheel and is designed to engage
the upper beveled end of a vertical slide, 114, held normally in a raised position by
a leaf-spring, 115, said slide working in a keeper, 1141, secured to the guide-
plates 95, its lower end being pivoted to the end of a lever 116. This lever, which
is pivoted to the stud 104, carries upon its free end a downwardly-hanging catch, 117,
which engages with one end of a rod, 118, said rod being loosely supported in n
perforated lug, 119, secured to the under face of the carrier, and in a keeper, 120,
secured to the machine-table. A downwardly-hanging arm 121 of rod 118 is
bifurcated at its lower end, said bifurcated end engaging a groove formed around
the periphery of the half-clutch 90 on shaft 87.
A spring latch, 122, is secured at one end to the rear face of the carrier, (not
seen,) its free end working in a guide, 123, secured to the upper face of the base
of the carrier, and entering one of the notches 124, formed in two opposite sides of
the head-plate 3 of the head-stock D, said latch holding the head and tail stocks and
the carrier-shaft stationary while the cutters are at work. This latch is drawn out
of engagement with the head-plate by means of a lever, 125, pivoted at its inner end
to the stud 104, said lever bearing on top of the spring-latch, as best seen in
Fig. 5, where the latch is shown in section in a depressed position.
Two operators are required to operate this machine, one standing upon either side
of the machine and performing the same work that of putting in the unturned
sticks, giving the carrier-shaft a half-turn, feeding the work to the cutters, and
taking out the finished work.
The first thing for the operator to do is to put the unturned sticks into position.
This is done by placing one end of the stick into the chuck, the center of the other
end resting against the spur 24. A partial revolution of the cam-lever 26 will,
through the medium of the T-groove 28, force the spur 24 forward into the end of
the stick, while the rods 29, by the same movement, will be forced towards the
head-stock through the medium of the lugs 32 on the clamps 31 working in the
cam-groove 33. This movement of rods 29 will draw upon rod 13, which will
cause the cone-shaped heads 14 in the center of the chucks to be drawn down upon
the lugs 12, which will close the jaws and lock the stick in the chuck, as will be
seen by an inspection of Fig. 8.
When the two spaces next to the operator have been filled, he bears down upon
lever 125, which draws the spring-catch 122 out of engagement with the notch in
the head-plate 3, thus allowing the head and tail stocks to be given one-half
revolution, in which position they will be again locked by the spring-catch.
The cutter-arbor, the drive-shaft G, shaft 87, and shaft 63 are now put in
motion, and continue so during the entire working of the machine.
The operator now bears down upon lever L, which is held in depressed position
by the spring-catch 105 engaging with the under side of the carrier B, as seen in
Fig. 5. This downward movement of lever L draws down the horizontal arm of
the bell-crank lever 102, which throws the perpendicular arm of said lever toward
the head-stock, carrying with it the half-clutch 41, which now engages with the
half-clutch 9 on the intermediate gear-wheel 7, as seen in Fig. 4. The continuous
revolution of the drive-shaft G gives a continuous revolution to the shaft 39 through
the medium of the screw-gears 37 and 38; consequently as soon as the clutch is
formed between 41 and 9 the revolutions of the shaft 39 are at once imparted to
the work to be turned. Hand-wheel 81 is now turned to the right, which revolves
shaft 82, when the gear-wheels 83, meshing with rack-bars 84, will feed the carrier
toward the cutters, bringing the sticks to be turned into the path of the cutters,
when stop 100, which has been previously adjusted by means of the adjusting-

page_text: screw 101, comes into contact with the end of guideway 1, which will draw latch 97
out of engagement with the shoe 96 upon the lower end of the slide 94, when the
spring 98 will force the slide upward and cause gear 93 to mesh with gear 92,
which causes the former to revolve. The diameters of gears 92 and 93 are such
that while gear 93 is making one revolution, gear 92, and consequently the work, is
making one and one-quarter revolution; which insures a perfect finish of the work
before the carrier is reversed. When gear 93 has nearly finished its revolution the
beveled-dog 113 strikes the beveled end of the slide 114, which forces the latter
downward, thus depressing one end of the lever 116 and lifting the catch 117,
which releases the rod 118, and allows spring 91 to throw half-clutch 90 into
engagement with half-clutch 91. Now as the shaft 87 has a continuous revolution,
as before mentioned, and the beveled gear 86 is loose upon said shaft, it will be
seen that as soon as the clutch is formed the gear-wheel 86 will revolve with the
shaft, and, being in mesh with the beveled gear 85, shaft 82 will be revolved in the
opposite direction from which it was turned by the hand-wheel, thus reversing
the carrier; and when the carrier has been reversed a short distance the spring-
catch 105 will come into contact with the adjusting-screw 109, disengaging the
former from the edge of the slot in the machine-table, which through the medium
of lever L and the link 103, will release the leaf-spring 108, which throws the
horizontal arm of the bell-crank lever 102 upward and the perpendicular arm away
from the head-stock, thus disengaging half-clutches 9 and 41 and stopping the
work. The upward movement of the horizontal arm of the bell-crank lever,
through the medium of the pin 110 and the lever 111, draws slide 94 downward,
thus disengaging gear-wheels 92 and 93. The slide 94 and gear 93 are held in this
downward position by the latch 97 engaging the shoe 96 until they are again
released by the forward movement of the carrier.
When the carrier has been reversed to its proper position lug 119, which is
fastened to the bottom of the carrier, abuts against the upper portion of the
bifurcated arm 121, and draws the half-clutch 90 out of engagement with the half-
clutch 89, in which position it is held by the catch 117 coming in contact with the
end of rod 118. The reverse movement of the carrier is now completed.
Having filled the two empty spaces while the turning was in progress, the
operator gives the head-stock a half-revolution, which brings the finished work
toward him to be removed, and places the unturned sticks into position to be turned.
He then bears down on lever Land operates the hand-wheel 81, as before described.
The number of sides to be given the work is determined by the number of
throws given the rocking bed by the eccentric while the work is making one
revolution; and the character of the sides, whether straight, concave, or convex,
is determined by the amount of throw. For instance, if it is desired to turn square
work, it is necessary that the eccentric should make four revolutions while the
work is making one, which causes the cutters in the arbor carried by the rocking
bed to come into contact with the work at every quarter-revolution of the work,
thus producing four sides.
To produce six or eight sides, it is simply necessary that the eccentric be given
six or eight throws to one revolution of the work.
To change the number of revolutions of the eccentric it is simply necessary to
change the sprocket-chain 61 from one combination to another of the sprocket-
wheel 60 and 62, wheels 62 being kept in alignment with wheels 60 as before
described.
If the eccentric were set with its center true to the center of its shaft, there
would be no throw and no movement to the rocking bed, and consequently round
work would be produced. As the eccentric is moved from the center the sides of
the work, which are convex become correspondingly straighter until a straight side
is produced, when if still more throw is given the eccentric, concave work will be
the result.
While I have described my machine as applicable to turning wood, it is evident

page_text: that the same system, modified as to speed and cutters, would be applicable also
to turning stone and other hard substances.
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. A. lathe having a positively-actuated rocking bed, a cutter-arbor mounted on
the bed, and two work-carriers, one on each side of the bed.
2. A lathe having a rocking bed, a cutter-arbor mounted on the bed, and two
work-carriers, one on each side of the bed, each carrier being provided with four
work-holding centers, and both capable of presenting work to the cutter at the same
time.
3. In a lathe, the combination, with the drive or main shaft G, the shaft 63,
carrying an eccentric, and connections between said shafts for giving the eccentric
a variable speed independent of the speed of the main shaft, of a rocking bed,
connections between the eccentric and said bed, a cutter-arbor mounted on the bed,
and two work-carriers, one on each side of the bed.
4. In a lathe, the combination, with the main shaft G, the shaft 63, carrying an
adjustable eccentric, and connections between said shafts for giving the eccentric
a variable speed independent of the speed of the main shaft, of a rocking bed,
connections between the eccentric and the bed, a cutter-arbor mounted on the bed,
and two work-carriers, one on each side of the bed.
5. In a lathe, the combination, with the main shaft carrying a set of differential
sprocket-wheels, a shaft 63, carrying a set of differential sprocket-wlicels longi-
tudinally movable thereon, a chain connecting both sets of wheels, and an eccentric
secured on shaft 63, of a rocking bed, connections between the eccentric and the
bed, a cutter-arbor mounted on the bed, and two work-carriers, one on each side of
the bed.
6. In a lathe, a cutter-arbor consisting of an arbor proper, a series of collars on
the arbor, each having a transverse groove in its periphery, and a cutter-holder
secured in the grooves in said collars.
7. In a lathe, a cutter-arbor comprising an arbor proper, a series of collars
detachably secured on the arbor, each having a transverse groove in its periphery,
and a cutter-holder detachably secured in the grooves in said collars.
8. In a lathe, the combination, with a carrier provided with rack-bars upon its
under side and movable within guides on each end of the frame, of a longitudinal
shaft provided with gear-wheels in mesh with said rack-bars, a hand-wheel upon its
outer end and a bevel-gear upon its inner end, a transverse shaft, a bevel-gear
normally loose thereon and in mesh with the bevel-gear on the longitudinal shaft,
and an automatically-actuated clutch engaging with the bevel-gear on the transverse
shaft, for the purposes stated.
9. In a lathe, the combination, with a carrier having a perforated lug on its
underside, of a shaft, as 87, carrying a loose bevel-gear provided with a half-clutch,
an annularly-grooved half, clutch splined upon the shaft, and a spring bearing
against the splined-clutch, a rod having a bifurcated arm in engagement with the
splined clutch, said rod being loosely supported in a keeper on the frame and in the
lug on the carrier, a spring-actuated lever pivoted to the carrier and provided with
a catch for holding the rod in a retracted position, and means for automatically
operating the lever to release the catch, so as to permit the rod to slide forward and
throw the half-clutches into mesh, for the purposes stated.
10. In a lathe, the combination, with the carrier, of a shaft 39. journalled therein,
gear-wheel 92 on said shaft, gear-wheel 93, meshing with wheel 92 and carrying a
radial bevel-ended dog, a slide movable in line with said dog, a spring-actuated lever
pivoted to the carrier and provided on its outer end with a downwardly-hanging
catch, the inner end of said lever being pivoted to said slide, a slide-rod mounted in
a lug on the carrier and a keeper on the frame and provided with a bifurcated arm,

page_text: shaft 87, carrying a loose bevel-gear provided with a half-clutch, an annularly-
grooved half-clutch splined upon the shaft, with which said bifurcated arm is
engaged, and a spring on said shaft and bearing against the splined clutch, for the
purposes stated.
11. In a lathe, the combination, with a head-stock having a clutch provided with
sliding jaws, of a tail-stock having a longitudinally-movable spur and mechanism
for simultaneously operating said jaws and spur.
12. In a lathe, the combination, with a head-stock having a chuck mounted upon
a tubular shaft, said chuck being provided with sliding jaws having inwardly-
projecting angular lugs, of a tail-stock having a longitudinally-movable spur
provided with a flanged head, a cam-lever having a T-shaped cam-groove in its
inner face for the reception of the spur-head, a rod 13, passing through the chuck-
shaft and provided on its inner end with a conical head having a groove adapted to
receive the angular lugs on the jaws, a rod, 29, passing through the tail and head
stocks and connected with rod 13, and a lug clamped onto rod 29 and engaging with
a peripheral cam-groove in the cam-lever, for the purposes stated.
13. In a lathe, the combination, with the carrier and a head-stock mounted upon
the carrier-shaft, said head-stock having a chuck mounted upon the inner end of a
shaft, 5, which is provided upon its outer end with a gear-wheel, 6, of a shaft, 39,
journalled in one end of the carrier, provided on its inner end with a splined half,
clutch and on its outer end with a screw-gear in mesh with a smaller screw-gear on
the drive-shaft, a gear-wheel, 7, mounted on a shaft journalled in the head-stock,
said wheel 7 being in mesh with wheel 6 and provided with a half-clutch, a hand
lever and intermediate mechanism for throwing said half-clutches into gear, and
automatic means for throwing them out of gear, for the purposes stated.
14. In a lathe, the combination, with the carrier having a slot in its base, the
wheel 7, journalled in the head-stock and provided with a half-clutch, and the
shaft 39, journalled in the carrier and provided on its inner end with a splined
half-clutch, of a bell-crank lever, 102, pivoted to the carrier, the vertical arm of
said lever being in engagement with the splined clutch, a spring under the horizontal
arm of said lever, a hand-lever, L, pivoted at one end to the carrier and connected
to the horizontal arm of the bell-crank lever, a spring-actuated catch, 105, pivoted
to lever L and passing through the slot in the carrier, and a stop, 109, fixed in the
frame, substantially as described, and for the purposes set forth.
15. In a lathe, the combination, with the carrier, the shaft 39 mounted thereon,
and the gear-wheel 92 fixed upon said shaft, of a slide, 94, working in ways 95 on
the carrier, a gear-wheel, 93, journalled on a stud fixed in the upper end of said
slide, and mechanism for automatically depressing said slide on the rearward
movement of the carrier, whereby wheel 93 is thrown out of engagement with
wheel 92, as and for the purposes stated.
16. In a lathe, the combination, with the carrier, of a spring-actuated slide 94
working in guides 95 on the carrier, provided with a projecting shoe on its lower
end and carrying a gear-wheel at its upper end, as described, a lever, 111, pivoted
to a standard rising from the base of the carrier, the bell-crank lever, 102, the
horizontal arm of which is provided with a vertical pin, 110, resting under one end
of lever 111, the other end of said lever being in engagement with the shoe on the
slide, the hand-lever L connected to the horizontal arm of the bell-crank lever, a
spring-actuated catch, 105, pivoted to said lever, and an adjustable stop fixed in
the frame, as and for the purposes stated.
17. In a lathe, the combination, with the bed and the carrier, of the slide 94,
constructed as described, the shoe on said slide being beveled on its under side, a
downwardly, beveled catch, 97, having a spring-actuated guide-rod loosely mounted
in keepers on the carrier, and a downwardly-hanging stop attached to said rod for
contacting with the bed-plate as the carrier moves forward, whereby slide 94 is
automatically released so as to be thrown upward by its spring, as and for the
purposes described.

page_text: 18. In a lathe, the combination, with the carrier of a head-stock and a tail-stock
mounted on the carrier-shaft and provided with a plurality of centers, a screw-shaft,
partially embedded in the carrier-shaft, passing through the tail-stock and swiveled
at one end in the head-plate of the head-stock, its other end being journalled in a
bushed bearing and adapted to receive a wrench, as and for the purposes set forth.
Dated this 29th day of September 1891.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.