IMPROVEMENTS IN TOOLS OR MACHINERY FOR TURNING, SCREWING, DRILLING, AND BORING'S PROVISIONAL SPECIFICATION
Year: 1873

page_text: i.
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 TOOLS OR
MACHINERY FOR TURNING, SCREWING, DRILLING, AND BORING'S
PROVISIONAL SPECIFICATION left by the said William Ford Smith
and Arthur Coventry at the Office of the Commissioners of Patents,
with their Petition, on the 27th November 1873.
We, WILLIAM FORD SMITH and ARTHUR COVENTRY, of Gresley Iron
Works, Salford, in the County of Lancaster, Engineers and Tool
Makers, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN TOOLS OR MACHINERY FOR TURNING; SCREWING, DRILLING, AND
BORING," to be as follows:-
-
Our improvements relate, firstly, to lathes and mechanism used in con-
nection therewith, and consist in improved construction, arrangement,
and combination.

page_text: The lathe spindle is open and hollow, so that articles to be turned can
be passed through and held in its axis. The inner bearing is coned, and
the pedestal has a sliding adjustment to take away. "play" in the
bearing. The spindle is driven by geering thrown in and out of geer
by a lever which comes against stops in the in-and-out-of-geer positions,
the handle being so arranged that its gravity keeps it in either of the
two positions without catches or their equivalents.
There is also an improved concentric chuck formed upon the principle
of the chasing apparatus Patented by us (No. 859, A.D. 1862), except
that the dies are made to hold and grip instead of having screw threads.
When this chuck is screwed upon the lathe spindle its dies or grippers
are opened or closed by a lever when the lathe spindle is held, or by a
friction brake or other friction mechanism when the spindle is driven.
で
For duplex bolt sliding two tools are used, one on one side, the other
on the other side, as if for simultaneous use in the ordinary manner,
but the cutting tools are both fixed on the same under slide, so that by
screwing the slide one way one tool is made to act, and by screwing in
the contrary direction the other cutter is made to act.
For turning such articles as buffer heads two separate cutting tools
are used on separate slide rests, but laterally they are acted upon by
shapers" which cause the cutting tools to traverse in the curves
required to give the desired shape to the article.
"
°
For turning one or more pulleys and like articles simultaneously as
many cutting tools are used as there are pulleys to be turned at the
same time, and the slide carriage carrying the tools is moved by a screw
over the face of the work, but the carriage is governed laterally by a
shaper" which gives the movement to the cutting tool that produces
the curve required.
I
For turning bolts and other work where several different cutters are
required to act in succession a capstan rest is employed, which turns on
a vertical axis to bring each tool (which is secured by two set screws)
in operation as required, the capstan being held in each position by a
catch that takes into a notch in the capstan, there being one notch for
each tool. The catch is forced and held in the notches by a spring, one
end of which is secured to the catch, the other or free end pressing
against a projection from the carriage of the capstan rest.

page_text: For combined turning and screwing or chasing we hinge our patent
screwing apparatus (No. 859, A.D. 1862) so that it can be brought
opposite the bolt to be screwed and then moved out of the way again
when the bolt is being turned.
The screwing apparatus is counterbalanced by a weight, and a buffer
arrangement is employed in the weight part to counteract the percussion
when the screwing apparatus is thrown back out of the way after being
used. The screwing apparatus. is opened or both opened and closed by.
self-acting mechanism, that is, when the carriage has moved to the
required extent in screwing or chasing a catch is released which allows a
spring or other equivalent mechanism to move the handle and open the
dies, the carriage being then drawn back by a weight. The spring is
charged or the weight is lifted to be ready to act by the operator while
the machine is screwing or by self-acting mechanism.
For screwing tubes or other similar articles where threads of the same
pitch are required at each end we use two of our patent screwing
apparatus (No. 859, .A.D. 1862) on the same carriage or on separate
connected carriages, the spaces between which are adjustable. The tube
or other article thus simultaneously operated upon at both ends is
rotated by a hollow lathe spindle.
When boring in a lathe or horizontally we hold the cone end of the
boring bar in the end of the lath spindle by a screw clamp, which
draws the bar by means of a cottar passing through the clamp and
boring bar firmly into the cone end of the lathe spindle, the screw clamp
is then tightened by a set screw that draws the two halves of the clamp
towards each other and against the exterior of the screw upon the end of
the lathe spindle.
Secondly. Our improvements relate to machinery used for drilling,
and consists in improved construction, arrangement, and combination
in a "radial drill," the bed of which is formed by a hollow rectangular
box; the speed pulleys or driving apparatus is placed near the ground,
-driving a vertical shaft passin, up the axis of a pillar fixed to the bed,..
which pillar supports the radial arm which carries the slide for the drill
spindle which is driven directly by wheels through a horizontal shaft
from the vertical shaft, the horizontal shaft sliding over the end of the
vertical shaft.

page_text: In machines where several drills are placed side by side to operate
simultaneously upon similar articles the head of the framing in which
the drill spindles are carried, the table, and the base part of the frame
are made hollow, and the head and base parts form reservoirs for the
liqour used in drilling which passes from the drills down the hollows of
the table to the reservoir at the base, from which it is pumped by a ram
actuated by an excentric or crank pin by geering from the horizontal
shaft that drives the spindles. The table is raised and lowered by two
fixed screws, the nuts of which are worm wheels driven by worms on a
horizontal shaft.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Ford Smith and Arthur Coventry in the
Great Seal Patent Office on the 26th May 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
FORD SMITH and ARTHUR COVENTRY, of Gresley Iron Works, Salford,
in the County of Lancaster, Engineers and Tool Makers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of November, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-.
cessors, give and grant. unto us, the said William Ford Smith and Arthur
Coventry, Her special license that we, the said William Ford Smith and
Arthur Coventry, our executors, administrators, and assigns, or such.
others as we, the said William Ford Smith and Arthur Coventry, our exe-.
cutors, administrators, and assigns,. shall at any time agree with and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
TOOLS OR MACHINERY FOR TURNING, SCREWING, DRILLING, AND BORING," upon
the condition (amongst others) that we, the said William Ford.
Smith and Arthur Coventry, by an instrument in writing under our
hands and seals, or under the hand and seal of one of us, should par-
ticularly describe and ascertain the nature of the said Invention, and in

page_text: to be filed in the Great Seal Patent Office within six calendar months.
next and immediately after the date of the said Letters Patent.
' NOW KNOW YE, that we, the said William Ford Smith and Arthur
Coventry, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement and the accompanying
Drawings (that is to say):-
Our improvements relate, firstly, to lathes and mechanism used in
connection therewith, and consist in improved construction, combination,
and arrangement.
The improvements in lathes to be first described are illustrated by
Figs. 1 to 4 inclusive, Fig. 1 being a side elevation, and Fig. 2 being a
partial end elevation, and by Fig. 3 a side, and Fig. 4 a partial front view
of the improved chuck. The late spindle a is hollow and open so that
metal or material to be turned can be passed through and held in its
axis by a suitable clutch or chuck 6 upon the end of the open spindle.
The hollow spindle a runs in three bearings, the inner one being coned
to fit its pedestal which is formed on a bracket (c) that can be slided
upon the headstock bed d to adjust the bearing to the cone upon the
spindle and remove play, the bracket c being adjusted by the screw c X
and secured when adjusted by the bolt c. The driving pulleys (a¹) are
arranged in the ordinary manner with back gearing for slow speeds, the
outer end of the back shaft having its wheel thrown in and out of gear
with the pinion on the speed pulleys by a lever e mounted upon the "back
shaft," to which an excentric is attached to work against a projection on
the headstead d, this lever having stops e¹ which come against stops on
the headstead in the "in gear" and "out of gear" positions; the lever
handle e being so arranged that its gravity keeps it in either of the two
positions without catches or their equivalents.
Our Invention also consists in an improved concentric chuck adapted
for open spindle and other lathes made upon the principle of the chasing
apparatus Patented by us, No. 859, in the year of our Lord One thousand
eight hundred and sixty-two, except that the dies are made to hold and
grip instead of having screw threads upon them. When this chuck is
screwed and secured upon the end of the lathe
spindle its dies or

page_text: grippers are opened or closed by a key lever when the lathe spindle is
held from revolving, or by a friction brake or other friction mechanism
when the spindle is rotated, as shewn by Figs. 3 and 4. f represents
the chuck; g, a lever having its fulcrum on a stud g¹ upon the head-
stock; g², a brake band secured to a stud in the headstock and passing
round the exterior or cylindrical part of the chuck, being then secured
to the lever g. By acting upon the lever g and applying the brake
when the lathe spindle is rotating one way the grippers are opened, and
by reversing the direction of the lathe spindle (as in screwing or chasing)
the brake still being applied the grippers are closed.
Our improvements in lathes for duplex turning are illustrated by
Fig. 5; a side view of part of the bed slide carriage and tool slides a is
the slide carriage or saddle on the bed b of the lathe; c is the tool slide
mounted to slide across it, and upon the slide c there is another
slide d with a screw d¹ for adjustment for one of the two tools c*
and d*. With such adjustments the tools can be used for ordinary
duplex turning, one tool acting as a roughing tool, the other being set
some distance back, sufficient to follow as a finishing tool. The cutters
can also be arranged for certain work, such as turning bolt heads, so that
onc cutter will rough turn the side of the head of the bolt by screwing
the slide one way, and then the finishing tool will act by screwing the
slide c the reverse way; a sufficient space being left between the two
cutters or tools and the work to allow them to act independently.
Fig. 6 is a plan view illustrating the construction, combination, and
arrangement of lathes for turning such articles as buffer heads. The
buffer head x is supposed to be fixed between the lathe centres in the
ordinary manner, y being the centre carried by the forcing head. a is a
compound slide of ordinary construction for turing the edge of the
buffer head; the bed for its lower slide may be bolted or otherwise
secured to a suitable table or. bed. The compound slides for turning the
concave and convex curves are fixed on the opposite side to the slide a.
The bed part 6 for each tool slide may be secured upon a table or bed,
then there is a slide which can be screwed to and fro by the screw b¹ in
a line perpendicular to the axis of the lathe spindle, and upon this slide
there is a slide c that can move freely at a right angle to the last named
slide, which slide (c) carries the cutting tool.. Attached to the bed
part of the slide is a slotted curved shaper 63 to give the required form
to the buffer head, and a stud c¹ secured in the tool slide c fits and works,

page_text: in the curved slot, so that when the lower slide is screwed backward and
forward by the screw 6¹ the tool slide c moves with it; but it has also a
lateral movement produced by the curved slot 62 so that the cutter acts
to produce the shape required.
9
}
Fig. 7 is a plan, and Fig. 8 and end elevation illustrating our
improved lathe for turning one or more pulleys and like articles simul-
taneously. As many cutting tools are used as there are pulleys to be
turned at the same time, and the sliding carriage carrying the tools is.
moved by a screw over the face of the work, but the slide carriage is
governed laterally by a shaper, which gives the movement to the cutting
tools to produce the curve required. a are three pulleys or like articles.
secured on the same mandrel a², and supposed to be rotated in lathe
centres. is the lower bed of the compound slide having a screw 6 for
moving to and fro the slide c carried by it, which slide carries a bed d
provided with a screw d¹ for moving across slide e upon it to and fro,,
which last-named slide carries another slide f to move freely to and from.
the work. This latter slide ƒ has fixings in it for the cutters or tools
which are separately adjusted by a set screw / that screws through a
die h¹, that can slide in a slot in a part projecting upwards from the-
tool slide g, which sliding die h¹ is brought opposite the end of each tool
or cutter holder g when adjustment is required; and when adjusted the
tool holder is secured in the fixings upon the tool shot by the set screws.,
To the side of the bed da piece d² is secured by T headed bolts,, which
enter a slot for such bolts formed in the side of the bed d. This piece d²
has a slot in it to give the required shape to the article to be turned, and
the stud f¹ secured in the tool slide fits and works in the slot, so that
when the slide e upon the bed d is moved by the screw d¹ the upper or
tool slide partakes of the motion of the slide e, upon which it is
mounted, and has a motion of its own at a right angle thereto produced
by the curved slot d³, and this compound motion causes the cutters 9 to,
traverse in the curve to give the required shape to the face of the
pulleys or other articles. The screws 6¹ in Fig. 6, and the screws d½ in..
Fig. 7, are self-acted in the usual manner from any convenient oscillating
mechanism.
4
->
Fig. 9 is an elevation, and Fig. 10 a plan illustrated our improved
capstan rest to be used in lathes for turning. The rest carries several.
cutters to be used in succession, and brought into position by turning.
the rest round à central axis. .a is the bed of the lathe; b, a slide
!

page_text: carriage to move along the lathe bed. Upon it is a cross slide carriage c
moved to and fro by a screw. The cross slide carries the axis d¹ of the
rest, which is a cylindrical part d having holes formed in it at regular
distances all round for the tool holders, each of which is secured by two
set screws, one tool holder d* and the screws d² and d³ to secure it,
being only shewn in Fig. 9. The cylindrical part d of the rest has
many notches d' (see plan) as there are tool holders, and there is a
catch e having its fulcrum e¹ upon the slide c, which enters these notches
as the capstan is turned, and holds it firmly in the correct position, while
the tool then opposite the work is operating. This catch e has a spring e²
secured to it, the free end of which rests against a projection from the
slide c. The same saddle is or may be made to carry a bracket or stand f
(secured to the saddle by screws) to form a fulcrum or axis f¹, upon
which our patent chasing apparatus g is mounted, so that when turning
has been done by the capstan or other rest the chasing or screwing
apparatus g can then be brought opposite the bolt or other article and
cut the screw thread upon it, and when this is done the apparatus may
be turned back out of the way, as shewn in Fig. 9. To avoid percussion
when the screwing apparatus is thrown back suddenly the counter-
balance weight g¹ which is heavy enough to keep it in the possession
shewn in Fig. 9 has a buffer g² and spring inserted in it, as shewn, the
buffer head coming against the head of the carriage, as shewn, and the
spring acting between the head and the interior of the hole in the weight,
and thus counteracts the momentum and prevents percussion.
Fig. 11 is a side elevation partly in section; Fig. 12, a plan partly in
section; and Fig. 13, a front view of part of the bed, with arrangement
to act as herein-after described. The screwing apparatus is opened or
both opened and closed by self-acting mechanism, that is, when the
carriages has moved to the required extent in screwing and chasing a
catch is released which allows a spring or other equivalent mechanism
to move the handle, and thus open the dies, the carriage being then
drawn back by a weight or spring. The spring is charged or the weight
is lifted ready to act by the operator or by self-acting mechanism. a is
the bed; b, the spindle; 6', speed pulleys; b³, pinion, in it driving a
wheel on the spindle b, and one upon a hollow shaft c, kept in its place
by a plate and set screw c¹. This hollow shaft c has a face plate dished
conically to fit another cone c³, which is connected with a shaft d by a
key, the shaft & being capable of sliding through the cone c³, but will
•

page_text: receive rotary or partial rotary motion when the cone c² is rotated or
partly rotated by being pressed in firm contact with the dished face
plate of the hollow shaft c. The end of the shaft d is held in a bearing
formed by a bracket or arm e from the slide carriage e¹, but the shaft d
is arranged so as not to move endway in the bearing, but it can and does
slide through the cone c³ and the hollow shaft c.. The shaft d has a
crank d¹ formed in it, and in the hollow or bend formed by this crank
the arm f¹ of the chasing or screwing apparatus frests when the dies
are closed in the act of screwing. There is a collar d² on the shaft ḍ,
which is adjustable, and this collar is made to come in contact with the
cone c² when the screwing apparatus has screwed far enough, and this
presses the cone c² against the dished cone, which gives the shaft da
partial turn, the crank d¹ throwing up the handle f¹, and thus opening
the screwing dies. Then the spring 9 on the shaft h below the carriage
which has been compressed in the act of screwing expands and forces.
back the carriage. The dies of the screwing apparatus may be closed
again ready for use by fixing an inclined arm i to the bed to came against
the lever arm ƒ.
°
;
Fig. 14 is a front elevation partly in section, and Fig. 15 is an end
elevation illustrating our improvements in securing tubes or similar
articles where threads of the same pitch are required at each end, but
they also may be used for screwing threads of different pitches. For
this purpose we use two of our Patent screwing apparatus (No. 859, in
the year of our Lord One thousand eight hundred and sixty-two), on the
same carriage or in separate connected carriages, the spaces between
which are adjustable. The tube or other article to be simultaneously
operated upon at both ends is rotated by a hollow spindle. a is the bed
on feet a¹; b is the headstock for the hollow spindle c, which has a face
plate c¹at one end, and a wheel at the other end, gearing with a
pinion on a shaft or stud d, having a wheel gearing with another pinion
on a speed pulley shaft e (see Fig. 15); e*, speed pulleys; f, are two
carriages of ordinary construction, upon each of which one of our Patent
screwing or chasing apparatus is mounted. There is a stand f¹ upon
cach carriage, on which a rest or support f' is secured (see Fig. 14ª
for side view of the V rest or support) to steady the end of the article
operated upon, which is or may be gripped and rotated by any ordinary
or suitable opening and closing gripping chuck, or "Clement's driver"
mounted upon the face plate or otherwise secured upon the end of the

page_text: hollow spindle c. The two slide carriages fare connected by a screw g,
one end of which can rotate (without end movement) in one carriage, or
it may be firmly secured to one carriage, while the other carriage can
move to and fro along it, and can be adjusted and firmly secured
to it by the screw nuts g³, shown in dotted line. When thus arranged
both carriages move together. This apparatus may be used for screwing
both ends of the same article with threads of different and reversed
pitches, both simultaneously and separately; separately when one
screwing apparatus acts while the other is open or has its dies with-
drawn; simultaneously when both carriages are disconnected.
.
○ Figs. 16, 17, and 18 illustrate our improvements in lathes for hori-
zontal boring. Fig. 16 is a side sectional view of the end of the lathe
spindle and apparatus for connecting the boring bar and lathe spindle;.
and Fig. 17 is an end view of the same. a is the end of the latho
spindle; 6 is part of a boring bar of ordinary construction, but the end
is coned to fit the hollow in the end of the lathe spindle; c is a collar
tapped to screw upon the end of the lathe spindle. This collar is cut
open longitudinally, and a screw c¹ is used to draw the two sides together,
and cottar holes are made in the collar for a cottar d, which passes
through the collar c and a hole in the boring bar 6, the cottar when
forced in acting to draw the cone end of the boring bar firmly into the
cone hollow of the lathe spindle, and the screw is then tightened, and
this firmly clamps the collar c upon the screw at the exterior end of the
lathe spindle. Fig. 18 is a sectional view shewing the connection
between a screw for actuating the slide carriage of the lathe for hori-
zontal boring. e is a screw, by rotating which by gearing connected
with the lathe spindle in the ordinary manner the carriage can be
traversed if required; f is a screw nut through which the screw works.
This screw nut is a wheel having its bearings on the carriage h, arranged
as shewn with the washer and lock nuts f¹. This wheel is in gear with
another on a cross shaft g, having bearings in the carriage; g¹ is a
handle for rotating the shaft g. The friction upon the bearings of the
nut and shaft 9 is greater than that of the screw e in the nut f;B
consequently the nut remains stationery while the screw e rotates as
long as the handle g¹ is not turned, and the carriage will be carried
along by it, but when the handle g¹ is turned the carriage h will move
faster or remain stationary or move in the opposite direction to the
motion imparted by the screw, depending upon the speed and direction
in which the handle-ġ¹ is turned.
g
1

page_text: Secondly. Our improvements relate to machinery used for drilling,
and consists in improved construction, arrangement, and combination.
Fig. 19 is a sectional elevation, and Fig. 20 a plan illustrating our
improved radial drill. The bed is formed by a hollow rectangular box, a.
The speed pulleys or driving apparatus bis placed near the ground,
carried by an arm from the end or side of the rectangular box, as shown,,
the driving apparatus being arranged, with single and double or "back
gearing," as as well understood. "The end of the driving shaft comes into,
the rectangular base, and on its end there is a bevil wheel that gears.
with one upon the lower end of a vertical shaft c in the axis of the
pillar & for the radial arm, which pillar is secured to the box, or base.."
The radial arm and hollow part e is formed in one piece and fits the
pillar d, as shewn, there being one or more screws e¹ acting on dies at
the bottom to take away play, while the arm is kept down by a flange d¹
secured to the top of the pillar d by screws, as shewn; e² is a hole for
oil to pass to the shaft c. At the top of the shaft there is a bevil wheel
that gears with one having bearings cast in the radial arm, in which
bearings the wheel can rotate, but not move endways. There is a slide
way in the boss of this wheel or a key which fits a key-way in a shaft ƒ
that can slide through the wheel, the innner end of this shaft having its
bearings in the slide g for the drill spindle, rotating motion being
conveyed from the shaft to the drill spindle by bevil wheels. Motion
for self-acting the drill is obtained by a speed pulley f¹ on the shaft f,
which drives one on the end of a cross shaft h having bearings in the
drill spindle slide g, as shown, and the end of this cross shaft has a worm,
upon it that drives a worm wheel on the vertical shaft, as shown..
The details and construction of the drill spindle and the mode of
giving feed to it being of the ordinary arrangement and construction
need not bed escribed.
Fig. 21 is a front elevation partly in section and Fig. 22 a side
elevation showing our improved construction of machine for simul-
taneously drilling by several drills placed side by side. a is the frame of
the machine formed in one hollow casting; 6 represents the centre lines
of several drill spindles of ordinary construction. The drill spindles are
driven by a cross shaft c and a pair of bevil wheels for each spindle.. The
table d upon which the work is placed is carried by two fixed screw
rams d', working in nuts formed in the bosses of, worm, wheels d³, driven

page_text: by worms on a shaft d³ as shown, the shaft being rotated from the cross
shaft c (shown by central line) by a belt working on a pulley or on speed
pulleys on the shaft c and on a short shaft e, which has a pinion that
drives a wheel that gears with a wheel on the end of the worm shaft d³.
There is a hollow in the lower and upper part of the casting to form
reservoirs for the liquid used for lubricating and cooling the drills, there
being a pipe provided with a tap in the upper reservoir for each drill.
The liquid from the work passes to the hollow of the table by
pipes d* to the reservoir below from which it is raised by a ram pump g
through the pipe h to the upper reservoir. The ram is worked by a
rod g¹ connected with a crank pin h, on the end of a short shaft h³,
which is driven by spur wheels from the shaft c.
We have now particularly described the nature of our Invention, and
the manner in which it may be carried into effect, and claim as our
Invention,-
Firstly. The arrangement, combination, and construction of open
spindle lathes, substantially as herein-before described and illustrated by
Figs. 1 and 2.
Secondly. The mode of constructing chucks for lathes, as herein-
before described and illustrated by Figs. 3 and 4.
Thirdly. The arrangement of the slides and tools for duplex turning
and their use, as herein-before described and illustrated by Fig. 5.
Fourthly. The combination and arrangement of tool slides and shapers
for simultaneously turning buffer heads and like articles, substantially as
herein-before described and illustrated by Fig. 6.
Fifthly. The combination and arrangement of slides and shaper for
turning the curved faces of several pulleys and like articles simul-
taneously, substantially as herein-before described and illustrated by
Figs. 7 and 8.
Sixthly. The construction, combination, and arrangement of a capstan
rest as herein-before described and illustrated by Figs. 9 and 10, and the
combination of such rest with the open spindle lathe hercin-before
described and illustrated by Figs. 1 and 2.
Seventhly. The arrangement of chasing or screwing apparatus on an
axis, with balance weight and buffer (92), and its combination with the
open spindle lathes illustrated by Figs. 1 and 2 or with other lathes,

page_text: and with the capstan rest, substantially as herein-before described and
illustrated by Figs. 9 and 10.
Eighthly. The combination of screwing or chasing apparatus with
mechanism for opening and closing the dies and moving the slide
carriage, substantially as herein-before described and illustrated by
Figs. 11, 12, and 13.
Ninthly. The combination and arrangement of mechanism for screwing
both ends of tubes and like articles, substantially as herein-before
described and illustrated by Figs. 14 and 15.
Tenthly. The construction and mode of connecting the horizontal
boring bar of lathes with the lathe spindle, and the arrangement for
giving motion to the carriage, substantially as herein-before described
and illustrated by Figs. 16, 17, and 18.
Eleventhly. The combination, arrangement, and construction of radial
drills as herein-before described and illustrated by Figs. 19 and 20.
Twelfthly. The combination and arrangement of machine for drilling
several holes simultaneously provided with reservoirs, and a pump and
pipes for supplying the drills with lubricating and cooling liquor, as
herein-before described and illustrated by the Drawings.
In witness whereof, I, the said Arthur Coventry, on my own behalf
and on behalf of the said William Ford Smith, have hereunto
set my hand and seal, this Twenty-fifth day of May, in the year
of our Lord One thousand eight hundred and seventy-four.