IMPROVEMENTS IN LATHES
Year: 1877

page_text: LETTERS PATENT to William Ford Smith and Arthur Coventry, of Gresley
Iron Works, Salford, in the County of Lancaster, Engineers and Tool Makers,
for the Invention of "IMPROVEMENTS IN LATHES." A communication from
abroad by William S. Cooper, of the Firm of Cooper, Jones, and Cadbury, of
Philadelphia, United States.
Scaled the 10th August 1877, and dated the 20th March 1877.
PROVISIONAL SPECIFICATION left by the said William Ford Smith and
Arthur Coventry at the Office of the Commissioners of Patents on the 20th
March 1877.
WILLIAM FORD SMITH and ARTHUR COVENTRY, of Gresley Iron Works, Salford,
in the County of Lancaster, Engineers and Tool Makers. IMPROVEMENTS IN
LATHES." A communication from abroad by William S. Cooper, of the Firm of
Cooper, Jones, and Cadbury, of Philadelphia, United States.
The Invention communicated to us is a combination and arrangement of
mechanism forming a lathe applicable for various purposes, but more particu-
larly for the turning, boring, and screw cutting of articles in brass. The driving
head stock is made citber single or double, geared somewhat in the ordinary
manner. For screw-cutting purposes there is a wheel on a stud, and secured to the
boss of the wheel there is a screw boss, and the wheel is in gear with a pinion on
the end of the lathe spindle. The stud for the screw and wheel is fitted into the
head stock excentrically, and there is a lever handle connected with it, in which
handle there is a sliding pin acted upon by a spring, this pin entering a hole in the
end of the head stock to hold the excentric stud in one position so that the wheel
will be in gear, and in another position so that the wheel will be out of gear.
Parallel to and behind the lathe bed there is a shaft which can oscillate and slide
end ways in bearings attached to the bed; on the outside end of this shaft there is
an arm which carries a part which is adjustable in the arm, upon the face of which
part a segment of screw thread is formed. There is also an arm having a handle
upon the sliding and oscillating shaft, and when it is brought down to rest upon
the lathe bed the segment of screw thread in the arm at the outside end of the
said shaft is in gear with the screw thread of the boss before mentioned, so that by
Paving G1

page_text: raising and lowering the handle arm the oscillating and sliding shaft is brought in
and out of gear with the screw and is moved endways for screw cutting.
Mounted upon the handle arm there is a slideway which is in about a horizontal
position across the lathe bed when the handle arm is down upon the bed, and upon
this slideway a slide is mounted which for the purpose of adjustment is moved
to and fro by an excentric in the slideway and is secured by a lock nut. The slide
is placed on the slideway so that its flat side is in a vertical plane, and this slide
forms a slideway for another slide which moves in a direction across the lathe bed
and at an angle of about 45 degress to the horizon when the handle arm is down
on the lathe bed. This last-named diagonal slide has a groove in its edge for the
tool holder, the tool being adjusted by a screw which actuates the upper slide.
To regulate the depth of cut there is a screw which prevents the upper slide from
being moved when it comes against the head of the stop screw. The handle arm
and the slides carried by it can be turned up and back out of the way when the
other tools are to operate.
The forcing head stock is arranged as follows:-There is a plate on the lathe
bed which can be readily secured on the bed in any required position by a bolt
passing from the plate through a double wedge under the bed, the lower wedge
being actuated by a lever jointed to the end of the upper and giving motion to the
lower wedge. The said plate on the bed forms a slideway for a slide, which can
be moved to and fro by a screw in a line across the lathe bed. A set screw is used
for a stop to limit the extent of movement when required, and there is a vertically
sliding pin in the said slide which is moved up and down by a handle connected
to an excentric which works the sliding pin, which in one position comes in the
way and in the other position is out of the way of the said set screw stop; there
may be also a corresponding stop screw on the opposite side. The forcing head
stock is mounted upon the said last-named slide on a vertical axis, so that it can be
turned either way at an angle to the line of the lathe bed when required, and
secured by screws in such position.
When the forcing head is truly parallel to the line of the lathe bed there is a
pin which passes through a hole in the flange upon which it rests into a hole in
the said slide that carries it.
The ram of the forcing head is hollow and the screw is arranged to rotate in and
move endways with it, and in the head stock there is a partial screw nut which by an
excentric turned by a suitable handle can be brought into and out of gear with the
screw in the hollow of the ram of the forcing head. There is also a pinion on a shaft in
the head stock that gears with the screw in the hollow of the ram, so that when the
partial nut is withdrawn from the screw the ram of the forcing head can be worked to
and fro by the pinion and shaft which has a suitable handle to it, but when the partial
nut is in gear the rain of the forcing head can only be worked to and fro by the screw.
The ordinary slide rest or a set of compound slides is carried upon a plate upon
the bed, secured in any required position along the bed by the double wedge and
lever arrangement above described. The lower plate of the compound slides, slides
upon the plate on the bed, and it has an under cut groove which fits the head of
the bolt for securing the plate and slides to the bed. Upon the lower plate, which
is a slideway, there is a slide that slides in a direction across the bed of the lathe,
which slide is moved by a screw. On the last-named slide there is another slide-
way mounted, which can be adjusted and fixed at any required angle horizontally,
and this slideway carries a slide which is adjusted by a screw that is actuated by
a handle on a shaft at a right angle to the screw for moving the slide, the shaft and
screw being geared together by screw wheels. The tool holder is secured in the
last-named slide.
A modification of the Invention consists in an arrangement and combination of
mechanism which can be used in place of the loose or following head stock above
described. Upon the slides, arranged as for the loose head stock above described,
there is a slideway upon which there is a slide that is moved to and fro by a
pinion on a shaft with suitable handle, which pinion gears with a toothed rack on

page_text: the slide; there is also a screw by which the slide may be moved to and fro when
required. Upon the slide there is a rest that is arranged to rotate upon a vertical
axis; this rest has several slides or receptacles for tools, in one of which there may
be held a centre and in the other receptacles tools in the order in which they are
to be used.
•
When the slide is moved forward the rest remains stationary so that the tool
then in front may be used; then when the slide is moved back the rest is partly
rotated and the next tool required is brought to the front and so on.
With a lathe arranged as above described a variety of operations, such as boring
either parallel or taper holes, screw cutting, turning, facing, and sliding can be
rapidly performed in succession with certainty, uniformity, and accuracy, from one
to two or three seconds time only being required in changing from one operation to
another,
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Ford Sunith and Arthur Coventry in the Great Seal Patent
Office on the 15th September 1877.
WILLIAM FORD SMITH and ARTHUR COVENTRY, of Gresley Iron Works, Salford,
in the County of Lancaster, Engineers and Tool Makers. "IMPROVEMENTS IN
LATHES." A communication from abroad by William S. Cooper, of the Firm of
Cooper, Jones, and Cadbury, of Philadelphia, United States.
The Invention communicated to us is a combination and arrangement of
mechanism forming a lathe applicable for various purposes, but more particularly
for the turning, boring, and screw cutting of articles in brass. The driving head
stock is made either single or double, geared somewhat in the ordinary manner.
For screw-cutting purposes there is a wheel on a stud, and secured to the boss of
the wheel there is a screwed boss, and the wheel is in gear with a pinion on the end
of the lathe spindle. The stud for the screwed boss and wheel is fitted into the
head stock excentrically, and there is a lever handle connected with it in which
handle there is a sliding pin acted upon by a spring, this pin entering a hole in the
end of the head stock to hold the excentric stud in one position so that the wheel
will be in gear, and in another position so that the wheel will be out of gear.
Instead of the spring pin the handle may be made elastic naturally to take hold
of a ledge or notch.
Parallel to and behind the lathe bed there is a shaft which can oscillate and slide
endways in bearings attached to the bed. On the outside end of this shaft there is an
arm which carries a part that is adjustable in the arm, upon the face of which part
a segment of screw thread is formed. There is also an arm having a handle upon
the sliding and oscillating shaft, and when it is brought down to rest upon the lathe
bed the segment of screw thread in the arm at the outside end of the said shaft is
in gear with the screw thread of the boss before mentioned, so that by raising and
lowering the handle arm, the oscillating and sliding shaft is brought in and out of
gear with the screw, and is moved endways for screw cutting.
Mounted upon the handle arm there is a slideway, which is in about a horizontal
position across the lathe bed when the handle arm is down upon the bed, and upon
this slideway a slide is mounted, which for the purpose of adjustment is moved to
and fro by a slotted washer and pin or an eccentric, and is secured by a lock nut.
The slide is placed on the slideway so that its flat side in a vertical plane, and
this slide forms a slideway for another slide, which moves in a direction across the
lathe bed and at an angle of about 45 degrees to the horizon when the handle arm
is down on the lathe bed. This last-named diagonal slide has a groove in its edge
for the tool holder, the tool being adjusted by a screw which actuates the upper
slide.
To regulate the depth of cut there is a screw which prevents the upper slide from
being moved when it comes against the head of the stop screw. The handle arm

page_text: •
and the slides carried by it can be turned up and back out of the way when the
other tools are to operate.
The forcing or following head stock is arranged as follows:-There is a plate on
the lathe bed which can be readily secured on the bed in any required position by a
bolt passing from the plate through a double wedge under the bed, the lower wedge
being actuated by a lever jointed to the end of the upper and giving motion to the
lower wedge. The said plate on the bed forms a slideway for a slide, which can be
moved to and fro by a screw in a line across the lathe bed, and a set screw or
screws is used for a stop to limit the extent of movement when required; and thero
is a vertically sliding pin in the said slide which is moved up and down by a handle
connected to an eccentric which works the sliding pin, which in one position comes
in the way and in the other position is out of the way of the said set screw stop.
There may also be a corresponding stop screw on the opposite side. The forcing
head stock is mounted upon the said last named on a vertical axis, so that it can
be turned either way at an angle to the line of the lathe bed when required, and
secured by screws in such position.
When the forcing head is to be truly parallel to the line of the lathe bed there is
a pin which passes through a hole in the flange upon which it rests into a hole in
the said slide that carries it.
The ram of the forcing head is hollow, and the screw is arranged to rotate in
and move endways with it, and in the head stock there is a partial screw nut,
which by an eccentric turned by a suitable handle can be brought into and out of
gear with the screw in the hollow of the ram of the forcing head; there is also a
pinion on a shaft in the head stock, that gears with the screw in the hollow of the
ram, so that when the partial nut is withdrawn from the screw, the ram of the
forcing head can be worked to and fro by the pinion and shaft, which has a suitable
handle to it, but when the partial nut is in gear the ram of the forcing head can
only be worked to and fro by the screw.
The ordinary slide rest or a set of compound slides is carried upon a plate upon
the bed, secured in any required position along the wedge by the double wedge and
lever arrangement above described. The lower plate of the compound slides, slides
upon the plate on the bed, and it has an under cut groove which fits the head of the
bolt for securing the plate and slides to the bed. Upon the lower plate, which is a
slideway, there is a slide that slides in a direction across the bed of the lathe, which
slide is moved by a screw. On the last-named slide there is another slideway
mounted, which can be adjusted and fixed at any required angle horizontally, and this
slideway carries a slide which is adjusted by a screw that is actuated by a handle on
a shaft at a right angle to the screw for moving the slide, the shaft and screw being
geared together by tangent wheels. The tool holder is secured in the last-named slide.
A modification of the Invention consists in an arrangement and combination of
mechanism which can be used in place of the loose or following head stock above
described. Upon the slides arranged as for the loose head stock above described,
there is a slideway upon which there is a slide that is moved to and fro by a pinion
on a shaft with suitable handle, which pinion gears with a toothed rack on the
slide. There is also a screw by which the slide may be moved to and fro when
required. Upon the slide there is a rest that is arranged to rotate upon a vertical
axis. This rest has several sides or receptacles for tools, in one of which there may
be held a centre, and in the other receptacles tools in the order in which they
are to be used.
When the slide is moved forward the rest remains stationary so that the tool then
in front may be used; then when the slide is moved back the rest is partly rotated
and the next tool required is brought to the front and so on.
With a lathe arranged as above described a variety of operations, such as boring
either parallel or taper holes, screw cutting, turning, facing, and sliding can be
rapidly performed in succession with certainty, uniformity and accuracy, from one
to two or three seconds time only being required in changing from one operation to
another.

page_text: Fig. 1 is a front elevation, Fig. 2 is an end elevation, and Fig. 3 a plan view of
the lathe. In Fig. 1, the fast and loose head stock and slide rests are shown; in Fig. 2
the fast head stock end is shown, and the wedge locking arrangement under the bed
for securing the slide rests, and loose head stock is shown in section. In the plan
view, Fig. 3, the fast and loose head stocks, the bed, and the back oscillating shaft and
handle arm and its connected slides are shown, but the slide rests, shown in Fig. 1, are
omitted to make the view more clear.
The loose head stock is shown detached in Figs. 4 to 8 inclusive, Fig. 4 being a
longitudinal section, Fig. 5 a cross section, and Fig. 6 a plan of the base slide of the
loose head stock, and Fig. 7, also a plan of the base slide, with part of the stem of the
loose head stock shown in section. Fig. 8 is a detached view of sliding stop bolt in
the base slide and handle for actuating it.
Fig. 9 is a side view, Fig. 10 and Fig. 11 is a front elevation of the handle arm
carrying the slides for screw cutting and other purposes, and Fig. 12 is a detached
view showing the arrangement of the stop screw for regulating the depth of cut for
screw threads and other purposes.
Fig, 13 is a sectional view of the compound slides for the turning tool taken in the
line parallel to the bed; Fig. 14, a section taken across the bed; and Fig. 15, a plan
view.
a is the bed of the lathe; a¹, the feet on which it is supported ; b, the fast head stock
which is shown double geared. The back shaft b' is thrown in and out of gear with
the driving wheel on the lathe spindle b² by an eccentric worked by a handle b³;
bis a wheel on the lathe spindle that gears with a wheel on an eccentric stud c¹ in
the fast head stock, as shown. This excentric stud has a handle c² to it, by moving
which the wheel c on the excentric stud can be brought in and out of gear with the
pinion on the lathe spindle. The handle c² is elastic laterally, so that when it is
to be secured in either of its extreme positions it can enter notches in or pass over
the ends of the segment c³ secured to the head stock. Upon the boss of the wheel c
on the excentric stud c¹ there is a screwed boss c which is secured on or to the boss
of the wheel c by a screw nut, as shown.
The screwed boss can be readily changed, being made of pitches suitable to produce
the required threads in the article to be operated upon by the lathe. d is a shaft at
the back of the lathe bed which can slide and oscillate in bearings from the bed.
Upon the outer end of the shaft & an farm d¹ is secured as shown, in the end of
which there is a recess for a part d which is adjustable in the arm and secured
by a screw, and this part has on its face a segment of a screw thread which cor-
responds with the screw thread on the boss ct. By oscillating the shaft & the segment
of screw is brought in and out of gear with the screwed boss c', and when in gear
with the latter the shaft d is traversed endways by the screwed boss. Upon the
shaft dan baudle arm d³ is secured, this handle arm being bored out to fit the shaft
d, then the part is cut through as shown, and a set screw is used to tighten the part
upon the shaft (see Figs. 9 and 10). An adjustable collar d* upon the shaft & to
act as a stop is also constructed in like manuer (see Fig. 3, and a detached side view
Fig. 3*). The handle arm d³ has a surface d' upon it to rest against the upper
surface of the lathe bed when in the position for work, the handle arm being
turned up and backward so as to be out of the way when not required. This
handle arm has a slideway formed on it for another slideway do which is con-
nected to the handle arm by a bolt do, as shown more particularly in Figs 10
and 11. The bolt screws into the slideway d³ and passes through a slot in the
handle arm. Upon the outside end of the bolt there is a cup washer d' which has a
slot in it for a pin fixed in the handle arm, and there is a helical spring upon the
bolt de between the cup washer and the nut on the end of the bolt, which nut is
secured on the bolt by a lock nut. By turning the cup washer d7 which has sides
upon its exterior for a screw key, the slideway d³ can be adjusted by the pin to and
fro on the handle arm, and when adjusted the slideway d³ may be secured by turning
the bolt do, which will act as a set screw. Upon the slideway d³ a slide d³ is mounted
as shown in Fig. 9, and this slide is actuated by a screw and handle to regulate the

page_text: depth of the cut of the tool, which is secured in a holder (0, having its securing bolt
head in an undercut slot in the edge of the slide d³, the set screw d¹¹, employed to secure
the cutting tool in the slot in the holder, at the same time securing the holder to
the slide by forcing the collar down and drawing the head of the bolt up
against the flanges of the undercut slot in the slide d³.
In Fig. 12 part of the slide 8 is shown in section with the screw do for actuating
it, also the screw 13, used as a stop to the slide d³ to regulate the depth of cut.
The stop screw d³ has a milled head to turn it by, and it is locked when adjusted
by the handle d"; this stop screw screws into a part from the slideway d³.
Figs. 4 to 8 illustrate the loose head stock; e is the bed plate which can slide upon
the lathe bed, and is secured in position on the bed by a bolt el passing from it
through a plate e and a slot in a wedge e at the under side of the bed, there being
a nut and lock nut on the end of the bolt under the wedge. This wedge is jointed
by a link to a handle e', having its fulcrum on the washer plate e, under the bed.
The bed plate e has a screw et in it, as shown, to actuate a slide e fitted upon the
bed plate or slideway e, as shown, and this slide plate e" has a hole in it for a
vertically sliding bolt e", which is actuated to lift up and down by a crank handle es
(see Figs. 4, 7, and 8). The axis of this handle has a crank pin in it, which enters
a cross slot in the vertical bolt. In the bed plate (e) there are two screws e", and
when the sliding bolt e' is down it will come against the ends of one or the other
of these screws when the slide e is moved one way or the other; the objects of such
screws is that they may act as stops or guages in certain classes of work required to
be done by the lathe; the moveable bolt e' giving the means of bringing these
stops or guages e into use, and of permitting any required movement in the slide
when the stops or guages are not required to operate. Upon the slide eª there is a
central circular lip or raised surface, upon which is fitted the pillar or stem for
carrying the forcing rain f¹. This stem ƒ is secured by bolts fx, the nuts of which
can move in concentric slots in the slide e (see Figs. 5 and 6), and this allows the
ram to be placed at any required angle for cone and other work.
When the ram is to be placed truly parallel to the lathe bed a pin f is passed
through a hole in the flange part of the stem into a hole in the slide e. The ram ƒ¹
of the loose head stock is hollow and has a screw f³ in its axis, this being free to
rotate in the hollow of the ram, but must in all cases move end ways with it as the
screw is prevented from moving endways in the ram by a screw nut bush which
screws into the end of the ram and close to a collar on the screw, as shown. Upon
the end of the screw f³ there is a hand wheel for rotating it. On the under sido
of the rain f¹ there is a long slot, as shown, which allows a segment of a screw
carried upon a vertical slide f to come in contact and in gear with the threads of
the screw f. The vertical slide f4 is fitted in guides in the central pillar f carrying
the ram, as shown in Figs. 4, 5, and 7, and this vertical slide is raised and lowered
to bring the thread on its upper surface in and out of gear with the screw f³ by a
small eccentric on a shaft f³ in bearings in the pillar f, which shaft is arranged as
shown best in Fig. 5. There is an arm or handle on the exterior end of this small
shaft f to actuate it. With the thread of the screw f³ a pinion fo is arranged to
gear, this pinion being on a shaft f' having bearings in the pillar, the shaft being
rotated by an arm or handle f³ on its exterior end (seo Figs. 4 and 7). When the
screw nut segment f* is in gear with the screw f³ the ram f¹ is moved to and fro
by rotating the screw, and the pinion f being free, it is rotated also when the screw
nut segment * is out of gear; the rain f¹ can be moved quickly to and fro by the
pinion on the shaft f". There is the usual handle fº (see Fig. 1) to secure the ram f¹
when required.
The construction of the compound slide rests is illustrated by Figs. 13, 14, and
15. g is a bed plate to slide on the bed of the lathe; it is made to receive a slideway
part g' upon it, which slideway part has a slot to fit the head of a bolt g*, the bolt
passing through the bed plate g and to an arrangement of washers and wedges
similar to that described in reference to the loose head stock. In the slideway
part g¹ there is a screw g³ for actuating the slide * upon it, as shown, and upon

page_text: this slide there is a slideway 96 secured so that it can be swivelled round on a
centre pin g and secured by bolts g' at any required angle, there being an index to
facilitate this, as shown in Fig. 15.
In this last-named slideway g" there is a screw g³ which has a tangent wheel on
its end gearing with a tangent wheel on a shaft g at right angle, so as to be more
conveniently turned (sec Figs. 13 and 15). The slides are arranged, as shown, so
that the screws and wheels will be covered to prevent "turnings" and dirt froin
getting to then. Upon the slideway go there is a slide 10 actuated by the screw g³
for carrying the tool holder or holders g¹¹.
Fig. 10 to 22 inclusive illustrate capstan rests which are combined with the slides
of the loose head stock, and used for certain classes of work in place of the pillar f
and ram f1; Fig. 16 is a front sectional elevation; Fig. 17, a side sectional elevation;
and Fig. 18, a plan; Fig. 19 is a front elevation partly in section to show the lever
against the edge of which the capstan rest is rotated; and Fig. 20 is a plan view;
Fig. 21 is a detached sectional view showing the mode of connecting and discon-
necting the nut of the slide with the screw; and Fig. 22 is a front sectional elevation
of a modification of the arrangement shown by Fig. 16. e, bed plate on the lathe
bed; e, the screw in bed plate; c, slide on the bed plate e (see Figs. 4, 5, 6, and 7).
To the slide e secured by bolts is a slideway upon which a slide h¹ is fitted, as
shown; this slide (¹) has a screw 2 fitted to it, as shown, the end of which
can slide in a hole in the slideway h. In or to the slideway a split
nut is fitted to slide to and from the screw h, as shown in Figs. 16 and 21,
and these half nuts are brought into and out of gear with the screw h² by a small
lever handle having two cam slots, one slot for a pin in one half nut, the other
for a pin in the other half nut. In the slide there is a bolt 5 which forms the
centre of the capstan rest ", in the base part of which rest there are as many holes
as there are tools to be in the rest, into one of which holes enters the end of a
vertical bolt / sliding in a hole in the slide when the rest is to be stationary for
work. This bolt his worked by a lever ³ (shown by dotted line in Figs. 16 and
20 and 22), having its fulcrum in the slide h¹; this lever (h³) near one end has a
notch in it that comes against a projection fixed in the slideway h, when the
slide is drawn back, which causes the lever ³ to lift and withdraw the sliding
bolt ', so as to allow the capstan rest to be turned. There is a spring h* attached
to the slide ³, which presses upon the end of the lever h³ (see Fig. 10), and shoots the
sliding bolt upwards into one of the holes in the capstan rest when the slide (¹)
has moved back. The slide (h') is moved to and fro either by the screw h² or by a
lever, which has its fulcrums h¹ on the slideway h. When the slide h¹ is drawn
back, and the bolt h7 is withdrawn, one of the teeth of a toothed disc or washer /¹¹
secured to the capstan rest comes in contact with the edge of a lever h**, having its
fulcrum on the slideway h (sec Figs. 19 and 20), and the continued motion of the
slide h¹ to a sufficient extent rotates the capstan; one of its divisions while the back
movement of the slide h¹ allows the sliding bolt to lock it in such position. The
front edge of the lever when in the position shown in Fig. 19, will act to turn
the capstan rest, but when its tail part is clevated by turning the short shaft ¹³ in
the slideway (see Figs. 19 and 20), so that the arin upon it props up the tail end
of the lever h; then the toothed disc or washer " will pass over the lever without
being acted upon.
Fig. 22 exhibits an arrangement similar to that shown by Fig. 16, except
that the slide h¹ in this is worked by a lever 10 (see Figs. 16 and 18), the screw h³
not being used. The screw h¼ shown in Fig. 22 is intented to act as a stop
screw.
Fig. 23 is a front elevation, Fig. 24 a side elevation, and Fig. 25 a plan of “rests”
which are sometimes required and used in combination with this lathe. is the
base plate on the lathe bed (see Figs. 13 and 14); i is the slideway carrying the
slide upon it. This slide at one end has an undercut slot for a tool holder 2, and
at the other end has a slide upon it with slots in it for tool holder it.
The bed plate e for the loose head stock can be moved along the bed, but when

page_text: required it may be moved by a hand wheel k on a shaft ¹ in bearings in the lathe
bed a, which shaft has a pinion on it that gears with a toothed rack k³ in slides in
the bed, the end of which toothed rack is attached to the bed plate e, see Fig. 26, a
front view, and Fig. 27, a cross sectional elevation.
We have now particularly described the Invention communicated to us, and
the manner of carrying the same into effect, and claim as the Invention secured
to us,
Firstly. The combination and arrangement of lathe bed, fast and loose head stocks,
back shaft d, and connected parts and the compound slide rests, substantially as
herein-before described and illustrated by the Drawings.
Secondly. The combination, arrangement, and construction of the parts c, c¹, c³,
c, c, d, d, and the handle arm d³, and slides and parts upon it, as herein-before
described and illustrated by the Drawings.
Thirdly. The combination, arrangement, and construction of the loose head stock
with its slides, adjustments, and moveable stops, and the arrangement of its ram f¹,
substantially as herein-before described and illustrated by the Drawings.
Fourthly. The combination, arrangement, and construction of the compound slide
rosts or tool holder, substantially as herein-before described and illustrated by the
Drawings.
Fifthly. The combination, arrangement, and construction of capstan rests on
slides, substantially as herein-before described and illustrated by the Drawings.
Sixthly. The slides and rests as herein-before described and illustrated by Figs. 23,
24, and 25 of the Drawings when used in combination with the capstan 'rest
mechanism.
Seventhly. The mode of giving motion to the slides of the loose head stock or
capstan rest, as herein-before described and illustrated by Figs. 26 and 27 of the
Drawings.
In witness whereof, we, the said William Ford Smith and Arthur Coventry,
have hereunto set our hands and seals, this Thirteenth day of September,
in the year of our Lord One thousand eight hundred and seventy-seven.