Improvements in and relating to Milling Machines.
Year: 1890

page_text: Date of Application, 2nd Dec., 1890
Complete Specification Left, 5th Jan., 1891-Accepted, 28th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in and relating to Milling Machines.
I, JOSEPH FLETCHER, of 111, Dolobran Road, Sparkbrook, City of Birmingham,
in the County of Warwick, Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to the automatical and multiple production, upon one or
more tools, instruments, implements or articles of many kinds at the same time, of
an unlimited number of sides, facets, facings, grooves cannelures, flutes or teeth,
principally for taps, reamers, cutters, nuts, boltheads, and tools or articles of many
other descriptions, made of steel, iron, copper, brass, wood or alloys and metals of
any kind requiring a number of similar shaped cuttings or millings, by the com-
bination of appliances and machinery hereinafter described.
In carrying out the improvements in my invention, I will describe them in con-
nection with milling of three grooves or flutes in a tap, for cutting or tapping the
screwthreads in a nut used for a bolt or in any other part of machinery, requiring
screwthreads to be cut in.
The main parts of the machine consist of stand or bed A, headstock B, back-
centre C and compound table formed of three slides, D, E and F, Figures 1, 2, 3
and 4.
Figure represents the front view of the machine, with part of bed A, half of
headstock B, and back centre C shown in section.
Figure 2 represents complete plan of machine.
Figure 3 represents complete end view, and
Figure 4 represents cross section of compound table D, E, F with appliances in
position.
The same letters of reference indicate corresponding parts in Figures 1, 2, 3 and 4.
I will now describe the individual and special appliances of my invention in detail,
and its combined automatic action in performing the work.
The bed A, Figures 1, 2, 3 and 4 is a special prepared casting, provided with
holes at each end on the bottom flange or rim, for having legs or standards bolted
to, so as to raise it from the floor, to a convenient height for working.
The bed is narrow at each end to suit the width of headstock B and back centre C,
whereas the middle or centre of bed is widened out to receive the compound table
or slide D, E, F, so as to give a good bearing surface for same, and allow for
appliances and gearing to be secured to it. This middle part of bed is provided
with dovetail edges, and these as well as the whole top surface are planed and
finished perfectly true to receive headstock, back centre and compound table, and
enable these to be moved easily backwards and forward at the will of the operator
and the requirements of the work operated upon.
Headstock B, Figures 1, 2 and 3 which is placed on bed above described and
secured by two bolts and nuts to it, is a casting, specially arranged and prepared
for receiving shaft a, and on specially provided brackets a 2 and a 3 to carry
driving spindle or shaft a 1.
Shaft a is bored and prepared at one end to receive a conical or taper spindle b,
carrying cutters or mills 1, the other end is screwed to receive lock-nuts at each
side of the conical journal a a, to steady it in its bearings, when running.
I also fix a toothwheel a 4 of suitable diameter on this shaft.
Driving spindle a 1 is turned all over, provided with driving pulley a 7, pinion a 9,
gearing into toothwheel a 4, and step pulley a 8, for transmitting motion to traversing
Crear

page_text: I carry this driving spindle a 1 in two castiron bearings or plummer blocks a 5
and a 6 of special shape, supported on brackets or arms 2 and a 3. These blocks
are let into grooves of supporting brackets, and are held in position by a bolt from
underneath through the bracket and screwed into the blocks. By loosening these
bolts, driving spindle a 1 with pinion a 9 can be thrown in or out of gear and
adjusted to requirements.
The uprights of headstock B are each provided with an opening on the upper
part, so as to allow the raising or lowering of shaft and spindle carrying
cutters / 1. On top, across the opening, I bolt an iron coverplate provided with a
hole for receiving screw a 11 with handwheel on for steadying shaft after having been
set to required height. The lower half of uprights are prepared to receive a screw
spindle with collar on a 12, going through the base of headstock; this end receives
a mitre wheel a 14; the other end of a 12 is screwed, & receives a wrot iron or steel
bush 13 screwed inside to fit « 12; the outer form of bush may be round, square
or hexagon and has freedom to move up or down inside the uprights and thus
lower or raise shaft a to its required position. To raise or lower this shaft in a
perfect horizontal position, I provide underneath the sole of headstock two
bearings 15, and a shaft a 17, and secure at each end a mitrewheel a 16, gearing
into a 14. The outer end of a 17 I make square, to receive a handle and by turning
this shaft, mitre wheels a 16 revolve a 14 and turn spindle a 12, one of which is
screwed right hand the other left hand, which causes the bushes or bushnuts a 13 to
move up or down, and thus raise or lower shaft a, in its bearings a 18 in a perfect
horizontal position.
Back centre C, Figures 1, 2, 3 and 4 is a casting, provided with large base, to
ensure its steadiness when standing on bed A, to which it is secured by four bolts,
sliding in tee slots, so as to move it backward or forward as required.
In the upper part of this casting is an opening to receive a block 1, having a
flange at one end, being square part of the body to fit into c, and the other part
turned and screwed to receive locknuts. When this block is put in position, I place a
square plate or washer on the far end, and screw the locknuts up tight to secure it
in position.
For the purpose of lowering or raising this block, I place a plate or clamp c4 on
top and across the opening of casting, to which it is bolted, then screw a spindle c5
with handwheel secured to it, through this plate. The lower end of spindle c5 is
shouldered down, and passes through a clamp c6 and has a loose collar fastened to
it at its final end. Clamp e 6 is fastened by four countersunk screws on to block cl;
by this means I raise or lower the back centre to the required position and secure
it there by screwing locknuts e3 up tight.
The purpose of this back centre is to support the spindle, with its cutters at the
opposite end from headstock and prevent any vibration or uneveness in its milling
operations.
To facilitate the steadying of spindle b, I bore a hole through block 1, insert a
spindle c8, to reach far enough through e 1, to allow a handwheel to be fastened on
it; it works against a shoulder inside of c 1, and the inner end of c8 is screwed to
its end. On to this I screw a bush e 7, which has a hole bored through, the one
end of the hole being screwed, the other end being taper to receive a steel centre c 9.
Now by revolving of this handwheel to the right or left, it moves bush e 7 and con-
sequently steel centre c 9 in or out, thus supporting the cutter spindle at its extreme
end.
Compound table or slide rest D, E, F, Figures 1, 2, 3 and 4 are slides resting
upon one another moving longitudinally, and crossways, D moving longitudinal by
hand, F moving crossways by hand or through motion imparted from traversing
gear, and also through a weight suspended by a chain fastened to its back end.
Slide D is an ordinary slide or moveable bed, fitted on centre of bed A. For the
purpose of setting or adjusting this slide I provide a screw spindle or traversing
screw d, having a bearing in the back end of bed A, against which it shoulders, and

page_text: To pre
Comming our place a
to the end bed.
Underneath the movable bed or slide I secure a screw bracket d 2, into which d
is screwed into, enabling slide D to be adjusted.
I now place at each corner on the front end of slide D a bracket e, secured to it
by two bolts. These brackets are bored and prepared to receive a steel centre e l
screwed into it, and kept in position by a locknut.
The parts of compound table marked E and F, are an ordinary machine or lathe
slide rest with flat bottom.
This part of the table I raise a distance from the top of D, and suspend or hang
the front end between the two centres e 1, just now described, for which purpose
I have let in two steel blocks, one on each side of table E, and into which I screw
centre pins el sufficiently tight to prevent it from having any play and loose enough
to allow table E with all appliances connected therewith to revolve. Thus the
other end of slide E may be raised or lowered at will.
At a certain distance from the back end of E I bore a hole through this slide
rest, through which I carry a rod f; to this rod I secure two camms f1. These
camms are so arranged, that when they are revolving, the lower the back end of
table E to three or more positions and raise it alternately to a perfect horizontal
position again, so that the top surface of slide D and bottom surface of slide rest E
are perfectly parallel.
The rod projects sufficiently out of the slide, to have a lever f2 secured to it,
which works between two dogs, or studs 3 and 4 on the side of table F, thus
revolving camms 1 and hence dropping and lifting table or slide rest E.
On the top of slide or slide rest EI secure an ordinary traversing slide F, which
may be carried out by means commonly known, such as dovetail slides or it may be
done with V shaped grooves, or any other shaped ribs and grooves.
For the traversing of slide F, I provide a screw spindle or traversing screw, running
at right angles to bed A and longitudinal to slide D.
This traversing screw is cut or screwed with a thread known under the name of
buttress thread or screw, instead of the ordinary square or V shaped thread, on
purpose to give a better grip to the nut into which this screw works.
The front
end of traversing screw is projecting far enough out to allow a handle to be used
for setting or adjusting purposes, the other or back end being made long enough to
receive a loose collari to prevent it moving backward or forward, and at the final
end 1 secure a worm wheel y2 geared into a worm g 3, rotated by a shaft 4, having
a joggle bracket 5 for bearing and at the final end of shaft g4 a steppulley y 6
keyed on.
Now when steppulley a8 and 6 are connected with a driving band or belt it
causes by its combination of worm, wormwheel and traversing screw to traverse
slide F on slide rest E from back to front.
Underneath the bottom of slide F I place a nut 7, split vertically in halves,
hinged at the top part and suspended from F, so as to close and open as required.
On each side of nut 7 1 secure a steel spring y8, the bottom edge of which is
rounded, and forces the nut halves together, or if required open the edges of the nut
are forced inside of rounded part of spring and remain there until released.
I now place at the front end of this nut, held by a rod a cone g 9 secured on each
side of slide rest E with a nut, the rod sliding in a slotted hole at each end for
adjustment. The cone is bored large enough to permit traverse screw to slide
through it easily, and the back end of it is provided with a sharp cone outward, so
that when it enters the nut 7, it forces the two halves open back into the springs #8,
thus disconnecting slide and traversing screw.
At the other end of the mut I place a cone 10, connected and fastened in exactly
the same manner for adjustement as cone 9, but I provide at end of g 10 a sharp,
short internal cone, large enough to admit the two halves of nut 7 when open, to
enter, and as the slide moves, to cause the nut to close and to grip the traverse
screw ready for acting.

page_text: On top of slide rest F, at the back end I place a specially shaped casting or sup
port 15, bolted on to it with four bolts moving in tee grooves, provided in top of
slide for adjustement.
I now bore three holes through the two sides of support 15 at equal distances,
and in these I place three steel chucks or bushes i. The head of these chucks are
polygonal shaped and shoulder against the support, and have an opening in the front
suitable for receiving the work to be operated upon.
To ensure that the work is always central, I bore a hole right through the chuck
and prepare it for screwing a steel centre 1 in, reaching far enough into the mouth
of the chuck to allow the work to be placed on its point, thus always keeping it
central, however it may be required to revolve.
At the outer end of these steel centres I place a locknut, to prevent it from coming
loose during the working of the machine.
At the bottom flange at the back of support 15 I provide smugs with a hole
through to fasten a flat link chain into, and letting the chain run over a specially
shaped bracket 12, bolted on to the end of slide rest E, having a roller secured in
it, I suspend a weight 1, sufficient large to move slide F back, as soon as its nut 7
has been disconnected from traverse screw g.
On to one side of bracket 2 I bolt a bearing plate 13, to carry the worm end of
shaft 4 I provide slot holes in bearing plate 13, so that by loosening the two
bolts, with which it is fastened to 12, the plate will slide down, throwing worm 3
and wornwheel 92 out of gear, to allow slide F to be moved, regulated or adjusted
by hand, using handle on square end of traverse screw g.
0
To allow shaft g4 to have free action, when slide rest E drops down, bearing g 5,
which supports shaft 4 has a hole bored at the end nearest the machine, which
receives a stud securely screwed into headstock B up to its shoulder, upon whici:
bearing 5 revolves, its bottom end shouldering up to the shoulder of stud.
To prevent go from coming off a groove is cut or turned near to the end of stud,
and one or two holes bored with pins passing through the bearing on each side of
stud taking its hold in the groove provided in the stud, thus securely fastening it,
and at the same time allowing it to revolve.
On to the chucks i, between the two sides of support 15, 1 key three wheels 12,
23 and 4, one on each, gearing into one another, thus when one moves, the three
revolve simultaneously and at the same ratio.
To produce this movement, I apply a feed motion, consisting of a lever i 5, sitting
on bush, close up to wheel i4, at the end of which to the front I place a pawl 6,
which grips into as many teeth as are required, for feeding or revolving the
chucks holding the work in the machine, joggling empty over the teeth going
upwards and moving or revolving the wheel 14 on its downward movement, thus
turning the three chucks at the same time, although in a different direction.
Pawl 6 is secured by a pin into a slot of lever 15. I secure a ball i7 on the
back side of lever 15; going diagonally and to the right downward, I place a double
armed lever, having its fulcrum at 10, which is fastened to the side of slide rest F,
one arm 11 going downwards, and one arm 19 laying horizontaly, with its end
opposite ball 7 above.
now provide this end of the lever with a ball i8, and connect both balls i 7 & i8
together with a rod i 9, both ends of which are prepared with adjustable straps to
receive the balls, thus forming a ball joint top and bottom.
The arm 11, which is vertical, moves between two cleats i 12 and i 13, which are
bolted to the bottom of slide rest E, and are adjustable for distance required.
may
To hinder the pawl i6 from falling or slipping out, on its downward movement I
place a spring, spiral, or any other convenient shape, between pawl 6 and sup
port 15, so as to hold it in place at all times. It be unhooked if required.
To prevent the chucks i from moving backward or forward out of position, from
where the feed motion has left it I provide in front and underneath these a groove,
in which a locking bolt k noves, locking and holding the work steady, every time
it is forced home.

page_text: Locking bolt is a square bar specially shaped to fit polygonal sides of the 3
chucks, has an opening at the outer end, with a pin through it. In this opening a
forked lever k 1 works, having its fulcrum on the right hand side of slide F in the
shape of a socketed fork, screwed into the slide F.
This lever 1 continues downward and terminates with a rounded nose. When
slide rest E drops down, through the action of the camms f1, it strikes a sill k 2,
which forces the bottom end of lever 1 inwards towards the slide causing it to
move on its fulcruun, and drawing the locking bolt out from its locked position
releases the chucks, ready for revolving. As the slide rest lifts it releases k 1,
and the springs force it into its locked position again.
Sill 2 is secured by two bolts in slotholes to the side of slide D for adjusting to
distance.
At the front end of slide E, I bolt a casting or bracket m, for carrying three
centre pins 1. This bracket is held down with two or more bolts in tee grooves h,
to allow for adjustment.
በራ
I use three forged steel centres m 1, each forged in one piece with its backplate,
which pins move easy in holes provided in bracket; at the bottom end of these
plates secure a screw pin with milled head m 2, and have a screwed hole in bracket,
into which these milled head pins screw into, thus drawing or pushing steel
centres in or out as required.
Having now particularly described and ascertained the nature of the details of
my invention, I will now particularize the action of the machine from the time that
the work is put in, until it is finished milling, and the machine stopped, all
actions being automatically from beginning to end.
Having seen that my centres il are secured by the locknut in proper position, I
place three taps between the centres, and now secure them by screwing the milled
head pins m2 tight up. My spindle with its cutters being in its proper order,
adjusted to height in headstock by screws a 12, moved by mitre wheels a 14 and a 16
on shaft a 17, steadyed by top screws a 11, in backcentre by screw c5, and locknuts €3,
the dogs, studs and cleats for levers i9, 1, f2 set at their proper distances, traverse
nut 7 properly closed, and locking bolt & fixed, I start the machine running.
Then step pulley a 8 driving 6 on shaft 4 with worm gearing 2 and 3 will
move slide from back to front, milling first flute in the three taps, commencing at
the tail or screw end of same, and continuing the whole length of flute required.
By the time that this is finished, dog f3 has moved lever f2, acting upon camms,
and carried same over far enough to drop the slide E down, sufficiently low, that
cutters 1 not only clear the milled flute or groove, but the tap altogether.
The drop of the slide rest E causes locking bolt lever 1 to slide sill 2, unlocking
or withdrawing the locking bolt, and keeping it open a sufficient time to move or
revolve chucks i.
At the moment that the slide E drops, the front cone 9 has entered traverse
nut 97, and forced it open, releasing the slide F, which is carried back to its
original position through the weight I and chain at back of machine.
During the journey of slide F to the front, cleat i 12 has acted upon the arm of
lever i 11, causing pawl i 6 to joggle empty over the number of teeth required, but
on the journey back, when the slide is traversing empty back, dog i 13 carries
arm i 11 back also, lifting arm 14 which pushes connecting rod i 9 causing lever i 5
to rotate, and thus forcing pawl i6 to move or rotate the three wheels i, carrying
the taps round ready for another groove to be milled.
Furthermore, this going back of slide F causes the stud f4 to act upon lever f2,
which turns camms fl to its original position and thus raises the slide rest E to its
working height.
It also causes the cone g 10 to close round the two halves of nut 97 and to close
them, which connects slide and traversing screw, and thus commences to bring the
slide F forward again.
Now the cutters are starting their second flute, and the action of all the parts as
described before, is repeated as many times, as there are sides or grooves required,

page_text: when a special screw traversing a lever with fork for belt throws this on to a loose
pulley and thus stops the whole machine.
Dated this Twenty-ninth day of November 1890.
COMPLETE SPECIFICATION.
Improvements in and relating to Milling Machines.
1, JOSEPH FLETCHER, of 111, Dolobran Road, Sparkbrook, City of Bir-
mingham, in the County of Warwick, 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:-
My invention relates to the automatical and multiple production, upon one or
more tools, instruments, implements or articles of many kind at the same time, of
an unlimited number of sides, facets, facings, grooves, cannelures, flutes or teeth,
principally for taps, reamers, cutters, nuts, boltheads and tools or articles of many
other descriptions, made of steel, iron, copper, brass, wood or metals and alloys of
any kind, requiring a number of similar shaped cuttings or millings, by the com-
bination of appliances and machinery hereinafter described.
In carrying out the improvements in my invention, I will describe them in
connection with the milling of three grooves or flutes in a tap for cutting or
tapping the screwthreads in a nut used for a bolt, or in any part of machinery,
requiring screwthreads to be cut in.
The main parts of the machine, shewn on drawings, left with the Provisional
Specification, consist of stand or bed A, head stock B, back centre C, and compound
table of three slides D, E, F,--Figures 1, 2, 3 and 4.
Figure 1. represents the front-view of the machine, with parts of bed A, half of
head stock B, and back centre C, shewn in section.
Figure 2. represents complete plan of machine.
Figure 3. represents complete end-view and
Figure 4. represents cross-section of compound table with appliances in position.
The same letters of reference indicate corresponding parts in Figures 1, 2, 3 and 4.
I will now describe the individual and special appliances of my invention in detail,
and its combined automatic action in performing the work.
The bed A, Figures 1, 2, 3 and 4, is a specially prepared casting, provided with
holes at each end on the bottom flange or rim for having legs or standards bolted
to, so as to raise it from the floor, to a convenient height for working.
The bed is narrower at each end to suit the width of headstock B, and back
centre C, whereas the middle or centre of bed is widened out to receive the
compound table or slide, to give a good bearing surface for same, and allow for
appliances and gearing to be secured to it.
This middle part is provided with dovetail edges, and these as well as the whole
top surface are planed and finished perfectly true to receive headstock, back centre
and compound table and enable these to be moved easily backward and forward to
the requirements of the work operated upon.
Headstock B, Figures 1, 2 and 3, which is placed on bed A, above described
and secured with bolts and nuts to it, is a casting specially arranged and prepared
for receiving shaft a, and on specially provided brackets or arms a 2, and a 3, to
carry driving spindle a 1.
Shaft a, is bored and prepared at one end to receive a conical or taper cutter-
spindle, carrying cutters or mills 1, the other end is screwed to receive
lock-nuts at each side of the conical journal a a, to steady it in its bearing.
I also fix a toothwheel a 4, of suitable diameter on this shaft.
Driving spindle a 1, is turned all over, provided with driving pulley a 7,
pinion a 9, gearing into toothwheel a 4, and step pulley a 8, for transmitting motion
to traversing gear.

page_text: I carry this driving spindle in two cast iron bearings or plummer blocks of
special shape, a 5, and a 6, supported on brackets or arms a 2, and a 3. These
blocks are let into grooves of supporting brackets and are held in position by a
bolt from underneath through the bracket and screwed into the blocks. By
loosening these bolts, driving spindle a 1, with pinion a 9, can be thrown in or out
of gear and adjusted to requirements.
The uprights of headstock B, are each provided with an opening on the upper
part, so as to allow the raising or lowering of shaft a, and spindle b, carrying
cutters b 1.
On top, across the opening, I bolt an iron cover plate, provided with a hole for
receiving screw a 11, with handwheel on, for steadying shaft after having been set
to required height.
The lower half of uprights are prepared to receive a screw spindle with collar
on, a 12, going through base of head stock; this end receives a mitre wheel a 14;
the other end of a 12, is screwed, receives a wrot iron or steel bush a 13, screwed
inside to fit spindle. The outer form of this bush may be round, square or hexagon,
and has freedom to move up or down inside the uprights and thus lower or raise
shaft a, to its required position.
To raise or lower this shaft in a perfect horizontal position, I provide underneath
the sole of headstock two bearings a 15, and a shaft a 17, and secure at each end
a mitre wheel a 16, gearing into a 14. The outer end of a 17, I make square, to
receive a handle, and by turning this shaft, mitre wheels 16, revolve a 14, and
turn the spindles a 12, one of which is screwed right hand the other left hand,
which causes the bushes or bushnuts a 13,-which do not revolve themselves, but
only raise and fall in their places-to move up or down and thus raise or lower the
shaft a, in its bearings a 18, in a perfect horizontal position.
Back centre C, Figures 1, 2, 3 and 4 is a casting, provided with large base, so
as to ensure its steadyness, when standing on bed A, to which it is secured by
bolts, sliding in tee slots, to move it backward or forward as required.
In the upper part of this casting is an opening e, to receive a block e 1, having a
flange at one end, being square part of the body, to fit into c, and the other part
turned and screwed to receive lock-nuts. When this block is put in position, I
place a square plate or washer on the far end and screw the lock-nuts up tight, to
secure it in position.
For the purpose of lowering or raising this block, I place a plate or clamp c4
on top and across the opening of casting, to which it is bolted, then screw a
spindle c5 with handwheel secured to it through this plate. The lower end of
spindle is shouldered down, and passes through a clamp c6 and has a loose collar
fastened to it at its final end. Clamp 6, is fastened by four countersunk screws.
on to block c 1. By this means I raise or lower the back centre to the required
position, and secure it there by screwing lock-nuts 3, tight up.
The purpose of this back centre is to support the spindle b, with its cutters at
the opposite end from head stock, and prevent any vibration or unevenness in its.
milling operations.
C
To facilitate the steadying of spindle 1, 1 bore a hole through block 1, insert a
spindle c8, to reach far enough through c 1, to allow a handwheel to be fastened
on to it; it works against a shoulder inside of 1; the inner end of c 8 is screwed
to its end. On to this I screw a bush e 7, which has a hole bored through, the
one end of the hole being screwed, the other end of the hole being taper to receive
a steel centre c 9. Now by turning the handwheel to the right or left it moves
bush 7 and consequently steel centre c9 in or out, thus supporting the cutter
spindle, at its extreme end.
Compound table or slide rest D, E, F, Figures 1, 2, 3 and 4, are slides resting
upon one another, moving longitudinal and crossways; D moving longitudinal by
hand, F moving crossways by hand or through motion imparted from traversing
and also through a weight suspended by a chain, fastened to its back end.
Slide D is an ordinary slide or movable bed, fitted on centre of bed A. For the
gear,

page_text: purpose of setting or adjusting this slide, I provide a screw spindle or traversing
screw d, having a bearing in the back end of bed A, against which it shoulders,
and to prevent it coming out, I place a plate d 1, over the end of spindle, and
secure it to the end of bed.
Underneath the movable bed or slide I secure a screw bracket d 2, into which
spindle d, is screwed in, thus enabling slide D to be adjusted.
I now place at each corner on the front end of slide D, a bracket e, secured on
to it by 2 bolts. These brackets are bored and prepared to receive a steel centre
into it, and kept in position by a lock-nut.
The parts of compound table marked E and F, are an ordinary machine or
lathe slide rest with flat bottom. This part of the table I raise a distance from the
top of D, and suspend or hang the front end between the two centres e 1, just now
described, for which purpose I have let in two steel blocks, one on each side of
table E, and into which I screw centre pins e 1, sufficiently tight to prevent it from
having any play and loose enough to allow table E, with all appliances connected
therewith, to revolve. Thus the other end of slide E may be raised or lowered
at will.
At a certain distance from the back end of slide E, I bore a hole through this
slide, and through it I carry a rod; to this rod I secure two camms 1. These
camms are so arranged, that when they are revolving, they lower the back end of
slide E, to three or more positions, and raise it alternately to a perfect horizontal
position again, so that the top surface of slide D, and bottom surface of slide E,
are perfectly parallel.
The rod, projects sufficiently out of slide, to have a lever f2, secured to it,
which works between two dogs or studs f3, and ƒ4, on the side of table F, thus
revolving camms f1, and hence dropping and lifting, alternately, table or slide E.
On the top of slide E, I secure an ordinary traversing, slide F, which may be
carried out by means commonly known, such as dovetail slides or it may be done
with vee shaped grooves, or any other shaped ribs and grooves.
For the traversing of slide F, I provide a screw spindle or traversing screw
unning at right angles to bed A, and longitudinal to slide D.
This traversing
screw is cut or screwed with a thread known under the name of "buttress thread,'
instead of the ordinary square or vee shaped thread, on purpose to give a better
grip to the nut, into which this screw works. The front end of traversing screw
is projecting far enough out to allow a handle to be used for setting and adjusting
purposes, the other or back end being made long enough to receive a loose
collar 1, to prevent its moving backward and forward, and at the final end I
secure a worm wheel 2, geared into a worm 3, rotated by a shaft g4, having a
joggle bracket 5, for bearing, and at the final end of shaft g4, a step pulley y 6,
keyed on.
Now when step pulley a 8, and 96, are, connected by a driving band or belt, it
causes by its combination of worm, wormwheel and traversing screw to travers
slide F, on slide E, from back to front.
Underneath the bottom of slide F, I place a nut 97, split vertically in halves,
hinged at the top part and suspended from F, by a lug being cast on, so as to close
and open as required. On each side of mut 7, I secure a flat steel spring #8,
specially shaped as shewn in Fig. 5, secured to slide F. The bottom edge of
these springs is rounded and forms a recess, behind the rounded roll, and force the
nut halves together, or if required keep them open; the edges of the nut are forced
inside of rounded part of spring and remain there until released.
I now place at front end of this nut, held by a rod, a cone 9, secured on each
side of slide E, with a nut, the rod sliding in a slotted hole at each end for
adjustment. These cones can be secured otherwise, by being made in a solid
block with screws passing through the sides of slide E, and adjusted thus or by any
other means and wise.
The cone g 9, is bored large enough to permit traverse screw g, to slide through
it easily, and the back end of it is provided with a sharp, short cone outward, so

page_text: that when it is driven into nut 97, it forces the two halves open, back into the
springs g 8, thus disconnecting slide and traversing screw.
At the other end of the nut 97, I place a cone g 10, connected and fastened in
exactly the same manner for adjustment as cone g 9, but I provide at the front end
of 10, a sharp, short internal cone, large enough to admit the two halves of
nut g7, when open to enter, and when the slide moves, to cause the nut to close and
to grip the traverse screw instantly, ready for acting.
On top of slide rest F, at the back end I place a specially shaped casting or
support 15, bolted on to it with tee headed bolts moving in grooves, provided
in top of slide for adjustment.
I now bore three holes through the two sides of bracket or support h 15, at
equal distances, and in these I place three steel chucks or bushes i. The heads
of these chucks are polygonal shaped and shoulder against the support, and have
an opening in the front, suitable for receiving the work to be operated upon.
To ensure that the work is always central, I bore a hole right through the
chuck i, and prepare it for screwing a steel centre 1, in, reaching far enough
into the mouth of the chuck, to allow the work to be placed on its point, thus
always keeping it central, however it may be required to revolve. At the outer
end of this steel centre I put a locknut, to prevent it from comming loose during
the working of the machine.
At the bottom flange at the back of support h 15, I provide a snug with a hole
through, to fasten a flat link chain l, into, and letting the chain run over a specially
shaped bracket 12, bolted on to the end of slide E, having a roller secured in it, I
suspend a weight 11, sufficient large to move slide F, back as soon as its nut 97,
has been disconnected from traverse screw g.
0
On to one side of bracket 12, I bolt a bearing plate 13, to carry worm end of
shaft 4.
I provide slot holes in bearing plate 13, so that by loosening the two
bolts, by which this is fastened to 12, the plate will drop down, throwing worm g 3,
and worm wheel 2, out of gear to allow slide F, to be moved, regulated or
adjusted by hand, using a handle on square end of traverse screw g. The throwing
out of gear of worm wheel 2, and worm g 3, could also be arranged by using a
camm, thus lowering or raising shaft g4.
To allow shaft 94, to have free action, when slide E, drops down, bearing g 5,
which supports this shaft, has a hole bored at the end nearest the machine, which
receives a stud, securely screwed into head stock B, up to its shoulder, upon which
bearing g 5, revolves, its bottom end shouldering up to the shoulder of stud.
To prevent g 5, from coming off, a groove is cut or turned, near to the end of
stud, and one or two holes bored, with pins passing through the bearing on each
side of stud, taking its hold in the groove provided in the stud, thus securely
fastening it, and at the same time allowing it to revolve.
On to the chucks i, between the two sides of support 15, I key three
wheels 2, 3, and i4, one on each, gearing into each other, thus when one moves,
the three revolve simultaneously and at the same ratio. To produce this movement,
I apply a feed motion, consisting of a lever i 5, sitting on bush i, close to wheel i 4,
at the end of which, to the front I place a pawl i 6, which grips into as many teeth
as are required, for feeding or revolving the chucks holding or carrying the work
in the machine, joggling empty over the teeth going upwards and moving or
revolving the wheel i4, on its downward movement, thus turning the three chucks
at the same time, although in different directions. Pawl i6, is secured by a pin
into a slot of lever i 5, for adjustment.
On the back side of lever i 5, I secure a ball 7; going diagonally and to the
right downward, I place a double armed lever, having its fulcrum at i 10, the centre
of which is fastened to the side of slide rest F, one arm ill, going downward,
and one arm i 14, running horizontally, with its end opposite ball i7, above.
I now provide this end with a ball i8, and connect both balls i7, and 18,
together with a rod i 9, both ends of which are prepared with adjustable straps
to receive balls, thus forming a ball joint top and bottom of rod i 9.
B

page_text: The arm 11, which is vertical, moves between two cleats 12, and 13, which
are bolted to the bottom of slide E, and are adjustable for distance required.
The falling or slipping out of position on its downward movement, of pawl 6,
is prevented by a spring, spiral or any other convenient shape being placed
between pawl and support h 15, so as to hold it in place at all times.
It may be
unhooked if required.
To prevent the chucks i, from moving out of position, where the feed motion
has left it, I provide in front and underneath these a groove, in which a locking
bolt k, moves backward or forward as required, locking and holding the chucks i,
and consequently the work placed in it, steady, every time it is forced home.
Locking bolt k, is a square bar, specially shaped to fit the polygonal sides of
the 3 chucks, has an opening at the outer end, with a pin through it.
In this
opening a forked lever 1, works, having its fulcrum on the right hand side of
slide F, in the shape of a socketed fork, screwed into slide E. This lever continues
downward and terminates with a rounded nose. When slide E, drops down, through
the action of the camms f1, it strikes (lever k 1,) a sill k 2, which forces the bottom
end of lever inward towards the slide, causing it to revolve on its fulcrum, thus
drawing the locking bolt k, out from its locked position, and releases consequently
the chucks i, ready for revolving. As the slide E, lifts by the camms, it clears
lever 1, and springs, spiral or flat, placed outside or on each side of this lever,
force it into its locked position again. Sill k 2, is secured by two bolts in slotholes
to the side of slide D, for adjusting to distance.
At the front end of slide F, I bolt a casting or bracket m, for carrying three
centre pins m 1. This bracket is held down by tee headed bolts in grooves h, to
allow for adjustment. I use three forged steel centres m 1, each forged in one piece
with its back plate, the pins moving easy in holes provided in bracket m; at the
bottom end of these back plates secure a screw pin with milled head m 2, and
provide a screwed hole in bracket m, into which these milled head pins screw
into, thus drawing or pushing steel centres m 1, in or out as required.
Having now carefully described the nature of the details of my invention, I will
now particularize and explain the actions of the machine from the time that the
work is put in, until it is finished milling and the machine stopped; all actions
being automatical from beginning to end, and multiple in its production of work.
Having seen that my centres 1, are secured by the lock nuts in proper position,
I place three taps between the centres, and now secure them in, by screwing the
milled head pins m 2, tight up. My spindle with its cutters being in proper order,
adjusted to hight in headstock by screws a 12, moved by mitre wheels à 14, and a 16,
on shaft a 17, steadied by top screws a 11; in back centre by screw c 5, and lock-
nuts e3, the dogs, studs and cleats for levers i 9, k1 and f2, set at their proper
distances, traverse nut g 7, properly closed and locking bolt k, fixed, I start the
machine running.
Then step pulley a 8, driving 96, on shaft g 4, with worm gearing g 2, and g 3,
will move slide rest F, from back to front, milling first flute or groove in the three
taps, commencing at the heel or screw end of same, and continuing milling whole
length of flute required. By the time that this is finished, dog f 3, has moved
lever f2, acting upon camms f1, and carried same over, far enough to drop slide E,
down, sufficiently low, that cutters 1, not only clear the milled flute or groove, but
the tap altogether. The drop of slide E, causes locking bolt lever 1, to strike
sill k 2, unlocking or withdrawing bolt k, and keeping it open a sufficient time for
chucks or bushes i, with their respective wheels to move or revolve. At the
moment that slide E, drops, the front cone g 9, has entered traverse nut 97, and
forced it open, releasing the slide, which is carried back to its original position by
the weight 11, and chain I, at back of machine. During the journey of slide rest F,
to the front, cleat i 12, has acted upon the arm of lever i 11, causing pawl i6, to
joggle empty over the number of teeth required, but on the journey back, when
the slide rest is traversing empty back, dog i 13, carries arm i 11, back also, lifting
arm 14, which pushes connecting rod 9, causing lever i 5, to rotate, and thus

page_text: forcing pawl i 6, to move or rotate the three wheels on bushes or chucks i, carrying
the taps round ready into position for another groove to be milled. Furthermore
the going back of slide rest F, causes stud f4, to act upon lever f2, which turns.
camms 1, to its original position and thus raises the slide E, to its working level.
It also causes the cone g 10, to close round the two halves of traverse nut g 7, which
has been open, to admit slide rest F to travel back, and close this nut, gripping
the traverse screw 9, which connects slide rest F, and screw g, and thus commences
to bring the slide rest F, forward again. Now the cutters are starting the second
groove or flute, and the action of all the parts as described before is repeated
as many times, as there are grooves or sides required to be milled, when by
means commonly known, a lever moving on a traversing screw, arranged on
headstock B, and bed A, touches a weighted belt fork, throws the driving band
from off the fast on to the loose pulley, thus stopping the whole machine.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. Providing horizontal lifting arrangement of shaft a, in headstock B, by
means of screws a 12, mitre wheels a 14, and a 16, shaft or spindle a 17, and steel
bushes a 13, substantially as described and set forth in Figure 1.
Secondly. Providing circular bearing g 5, on stud, secured to side of head-
stock B, for carrying shaft g 4, same to act as rocking bearing for the rise and
fall of slide E, substantially as described and set forth in Figures 2, and 3.
Thirdly. The combination of slides D, E, F for moving and adjusting, longi-
tudinally, crossways, by hand, by traversing screws d, and g, and traversing gear of
worm and wormwheel 92 and g 3, and also by chain and weight 1 and 71, sub-
stantially as and for the purpose set forth in Figures 1, 2 and 4.
Fourthly. Providing camms f1, with combination of rod and lever fand ƒ 2,
under compound slide E, F, with multiple facings for lowering compound slide E, F,
to three or more depths, and alternately returning to its original working level,
substantially as described and set forth in Figures I and 4.
Fifthly. The combination of three division wheels i 2, i3 and 4 on chucks i, for
revolving the work operated upon at the same time and ratio, substantially as and
for the purpose set forth in Figures 1, 2 and 4.
Sixthly. Providing special centres i 1, in combination with chucks i, for keeping
the work operated upon always true and central, substantially as described and set
forth in Figures 2 and 4.
Seventhly. The combination of adjustable centre pins m 1, with tailplate and
milled head screw pins m 2, in bracket m, for securing and holding work in position,
substantially as herein described and set forth in Figures 2 and 4.
Eighthly. Providing brackets e, with adjustable centres e 1, for the purpose of
suspending slide E, with appliances, so as to allow camms f1, to raise or lower
slide E; when lowered to clear the cutters, and when raised to be true to working
surface, substantially as set forth in Figures 1 and 2.
Ninthly. Arrangement for throwing traversing gear 9 2 and 93 in and out of
gear by means of combination of bearing plate 13 with a camm or otherwise,
substantially as described and set forth in Figure 2.
Tenthly. The combination of ball joints i 7, and i8, and adjustable connecting
rod i 9, with feed motion, for revolving division wheels i 2, i3 and 14, substantially
as and for the purpose set forth in Figures 1 and 2.
Eleventhly. The combination of traverse nut 97, springs 98, cones 99 and 9 10,
with traverse screw g, for connecting and disconnecting instantly traverse screw g
and slide rest F, to move forward at a fixed rate, and to return to the back at a
quick speed, substantially as herein described and set forth in Figures 4 and 5.
Twelfthly. A locking bolt k, with striking lever k 1, and sill k2, for locking
and releasing chucks i, for the purpose set forth in Figures 1 and 2.
Thirteenthly. The combination with a milling machine of self-acting means for

page_text: feeding and revolving of work, and for raising and falling of slides, substantially
as described and set forth in Figures 1, 2, 3 and 4.
Fourteenthly.-Improvements in milling machines for the multiple production
of one or more sides, facings, facets, grooves cannelures, flutes or teeth upon one
or more tools, instruments, implements or articles at the same time, as herein
described and set forth in Figures 1, 2, 3 and 4, of the drawings left with Pro-
visional Specification; and which said machines are constructed, and the parts
arranged and operated, substantially as described and set forth.
.
Lastly. The general construction and arrangement of the parts of automatic
multiple milling machine, substantially as herein described and set forth in
Figures 1, 2, 3 and 4.
Dated this Third day of January 1891