IMPROVE- MENTS IN MACHINES FOR DRILLING AND MILLING METALS
Year: 1884

page_text: I, WILLIAM WILSON HULSE of the Ordsal Tool Works Salford in the County of
Lancaster, Engineer, do hereby declare the nature of said invention for IMPROVE-
MENTS IN MACHINES FOR DRILLING AND MILLING METALS to be as follows:-
A base plate carries two headstocks situated in line with and facing each other
and at a distance apart which may be varied as occasion requires; on each
headstock is mounted a radial arm having a horizontal tubular stem which is held
in bearings in the headstock, and can be rotated in the bearings either automatically
or by hand and thus causes the radial arm to be rotated in a vertical plane; on the
radial arm is a slide which carries a horizontal tool spindle and which can be
moved to and fro along the radial arm in suitable guides. For centreing and
assisting to support the work to be operated on the tubular stem is fitted inside
with a central bar which can be moved to and fro horizontally, and one end of
which extends outside the tubular stem. Each headstock carries a driving shaft
through which rotation is imparted to a loose spur wheel carried by the
corresponding tubular stem and concentric with it; two other spur wheels,
situated in different planes to each other, gear into the loose one (the width of
which is greater than that of the other two spur wheels added together); one of
these, carried by the corresponding radial arm, drives (through suitable mechanism)
the tool spindle and automatic feed gear for same, and the other one, mounted on
the corresponding headstock, transmits (through suitable mechanism) automatic
rotary movement to a worm wheel keyed upon the tubular stein of the corre-
sponding radial arm; by means of change wheels introduced in the mechanism for
producing this automatic rotary movement, the speed of rotation of the worm
wheel (and consequently of the radial arm) in relation to that of the tool spindle
can be varied according to requirement. The mechanism for actuating the radial
arm by hand also works through the change wheels and worm wheel already
mentioned, and is provided with a dividing arrangement for enabling the radial
arm to be moved intermittently through any desired angular distances. The
worms which gear into the two respective worm wheels may each be formed in
two lengths, one of which is adjustable endwise for the purpose of causing the two
lengths to press upon the teeth of the corresponding worm wheels in such a manner
as to prevent backlash. Either the automatic or the hand gear for rotating the
radial arms can be put in or out of gear at will. The work is placed between the

page_text: two radial arms and can be operated upon by the tools in the two tool spindles
either simultaneously or otherwise. In some cases the central bars may be omitted,
or each radial arm may be formed or provided with a central projection having no
horizontal movement; in either of these two last cases each radial arm instead of
being carried upon a tubular stem may be formed upon or secured to the
corresponding worm wheel, which in such cases may work in circular guides
formed in the headstock; each driving shaft is then carried by the corresponding
worm wheel and radial arm, and has an axis which is parallel to, but not
concentric with, that of the worm wheel; hence the pulley upon each driving shaft
is carried round in a circular path when the corresponding worm wheel is rotated,
and in order to keep the driving belt tight in all positions of the driving pulley a
swing overhead driving apparatus is employed. In some cases one headstock only
may be employed. In some cases the headstocks or headstock instead of standing
upon a base plate may be secured upon the sliding table of a Planing or other
Machine.

page_text: Improvements in Machines for Drilling and Milling Metals.
I, WILLIAM WILSON HULSE of the Ordsal Tool Works Salford in the County of
Lancaster, Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS IN MACHINES FOR DRILLING AND MILLING METALS, 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 Sheet of Drawings:-
A base plate carries two headstocks situated in line with and facing each other
and at a distance apart which may be varied as occasion requires; on each head-
stock is mounted a radial arm having a horizontal tubular stem which is held in
bearings in the headstock, and can be rotated in the bearings either automatically
or by hand, and thus causes the radial arm to be rotated in a vertical plane; on
the radial arm is a slide which carries a horizontal tool spindle and which can be
moved to and fro along the radial arm in suitable guides. For centering and
assisting to support the work to be operated on, the tubular stem is fitted inside
with a central bar, which can be moved to and fro horizontally, and one end of
which extends outside the tubular stem. Each headstock carries a driving shaft
through which rotation is imparted to a loose spur wheel carried by the corre-
sponding tubular stem and concentric with it; two other spur wheels, situated in
different planes to each other, gear into the loose one (the width of which is
greater than that of the other two spur wheels added together); one of these
carried by the corresponding radial arm, drives (through suitable mechanism) the
tool spindle and automatic feed gear for same, and the other one, mounted on the
corresponding headstock, transmits (through suitable mechanism) automatic rotary
movement to a worm wheel keyed upon the tubular stem of the corresponding
radial arm; by means of change wheels introduced in the mechanism for producing
this automatic rotary movement, the speed of rotation of the worm wheel (and
consequently of the radial arm) in relation to that of the tool spindle, can be
varied according to requirements.-The mechanism for actuating the radial arm by
hand also works through the change wheels and worm wheel already mentioned,
and is provided with a dividing arrangement for enabling the radial arm to be
moved intermittently through any desired angular distances. The worms which
gear into the two respective worm wheels may each be formed in two lengths, one
of which is adjustable end wise for the purpose of causing the two lengths to press
against the teeth of the corresponding worm wheels in such a manner as to prevent
backlash. Either the automatic or the hand-gear for rotating the radial arms can
be put in or out of gear at will. The work is placed between the two radial arıs
and can be operated upon by the tools in the two tool spindles either singly or
simultaneously.-In some cases the central bars may be omitted, or each radial
arm may be formed or provided with a central projection; in either of these two
last cases, each radial arm instead of being carried upon a tubular stem may be
formed upon or secured to the corresponding worm wheel, which in such cases may
work in circular guides formed in the headstock; each driving shaft is then carried
by the corresponding worm wheel and radial arm, and has an axis which is parallel
to, but not concentric with, that of the worm wheel; hence the pulley upon each
"

page_text: 'driving shaft is carried round in a circular path when the corresponding worm
wheel is rotated, and in order to keep the driving belt tight in all positions of the
driving pulley, a swing overhead driving apparatus is employed. In some cases
one headstock only may be employed. In some cases the headstocks or headstock
instead of standing upon a base plate may be secured upon the sliding table of a
Planing or other Machine, in order that the work to be operated on, may be planed
drilled and milled during one setting, this arrangement being of special advantage
in the case of Engine Cylinders, in which the valve faces and valve chest flanges
can be planed, the ends of the Cylinders can be drilled, and the outsides of the end
flanges can be drilled during one "setting" of each Cylinder.
In the accompanying drawings, Fig. A is a side elevation-Fig. B an end
elevation, and Fig. C a part plan, of a Machine constructed in accordance with the
present improvements. In these views, 1 is the base plate, 2, 2 are the two
headstocks situated upon it, in line with and facing each other, at a distance apart
which may be varied as occasion requires, by means of a rack 8 fixed to or formed
in the base plate and of pinions 9; 9 carried by the two headstocks respectively;
when adjusted in position upon the base plate the headstocks are secured thereto
by means of bolts.-In each headstock, 3 is the radial arm, having a horizontal
tubular stem 4 which is held in bearings in the headstock 2, as shewn, and can be
rotated therein either automatically or by hand as subsequently described, thus
causing the radial arm to be rotated in a vertical plane, 5 is the slide which is
movable to and fro along the radial arm in suitable guides as shown, and which
carries the horizontal tool spindle 6; the automatic horizontal feed of the drill
spindle is effected through the intervention of differential spur wheels and of a
screw (having no horizontal movement in the drill spindle slide) which works in a
nut in the drill spindle all as shown in Fig. A, this arrangement being employed,
instead of others commonly used for imparting feed to drill spindles, in order that
the feed mechanism may project as little as possible into the span between the drill
spindle slide and the headstock; 7 is the central bar which is movable to and fro
horizontally endwise in the tubular stem 4, and has one of its ends extending
outside the tubular stem for the purpose of centering and assisting to support the
work to be operated upon; for which purpose conical or other bushes may some-
times be used on the end of the bar, or the bar may be furnished with a conical
centre such as are used in the spindles of Lathes; the end wise movement of this
central bar is produced by means of a hand wheel, screw and nut, (shown in the
drawings) as in the case of the spindle of the following headstock of a Lathe;
10 is the driving shaft (fitted with a Cone driving pulley 11) which, by means
of a spur wheel 12 keyed upon it, drives the loose spur wheel 13 mounted
upon the tubular stem 4; 14, 15 are the two other spur wheels, situated in
different planes to each other, which gear into 13, and whose combined widths
are together less than that of 13. 14 is keyed on a shaft carried by the radial
arm as shown, and, through mechanism, as shown, drives the tool spindle 6
and the automatic feed gear for same; the shaft 16 of the driving gear on
the radial arm slides endwise through the bevel wheel which drives it. when
the slide 5 is traversed along the radial arm 3; 15 is keyed on a shaft carried
by the headstock 2; the arrangement of the wheels 13, 14 and 15 is such that
the radial arm can be rotated through a complete circle; on the same shaft
with the spur wheel 15 is a worm 17, which through the worm wheel 18, shaft 19,
change wheels 20, (the intermediate one of which is carried by an adjustable
pivotted bracket as shown) shaft 21, and worm 22 (on shaft 21) drives, auto-
matically the worm wheel 23 which is keyed upon the tubular stem 4; by varying
the change wheels the speed of rotation of the worm wheel 23 (and consequently
that of the radial arm 3) in relation to that of the tool spindle 6, can be varied
according to requirement; the change wheel on shaft 19 is formed as a friction
clutch (as shewn in Fig. B) which can be put in or out of gear according as it is
required to have the automatic mechanism for actuating the worm wheel 23 in
gear or not; the change wheel on shaft 19 is provided with a handle 24 by means

page_text: of which the worm wheel 23 can be actuated by hand, the friction clutch being
kept out of gear when the hand mechanism is employed; 25 is a dividing disc,
baving notches as shewn, by the aid of which, the worm wheel 23 and radial arm 3
may be moved by hand through any desired angular distances; the handle 24 is
furnished with a stop as shewn, which can be engaged with the notches in the
dividing disc, when the automatic mechanism is out of gear, for the purpose of
securing the radial arm in any desired position; the worm 22 is made in two
lengths (as shown), one of which is adjustable end wise by means of lock nuts so as
to cause the two lengths of each worm to press in opposite directions against the
teeth of the worm wheel 23, and thus prevent any backlash.-The worm 17 may
be constructed in a similar manner. The work is placed between the two radial
arms and is secured in position on the base plate by means of bolts (for which
T slots are provided in the base plate as shown in Fig. B) and either with or
without the assistance of one or both of the central bars 7, 7, according to the
character of the work.
Fig. D is a side elevation and Fig. E an end elevation of an alternative arrange-
ment in accordance with the present improvements, in which the central bar 7
(of Figs. A. B. C) is omitted, and in which the radial arm 3 is provided with a
projection 26 concentric with its axis of rotation. In this arrangement the radial
arm 3 is made in one piece with the worm wheel 23, which rotates in circular
guides in the headstock 2 as shown; the driving shaft 10 is carried by the worm
wheel and has its axis parallel to but not concentric with that of the worm wheel;
hence the cone pulley 11 upon the driving shaft is carried round in a circular path
when the worm wheel is rotated, and in order to keep the driving belt tight in all
positions of the cone. pulley, a swing overhead driving apparatus as shown is
employed. The automatic rotation of the radial arm is effected through the spur
wheels 27. 28 (the latter having its axis concentric with that of the worm wheel),
crank disc 29 (with slot for adjustment of the "throw" of the crank pin), pawl 30
(actuated by the crank pin), ratchet wheel 31, shaft 32, bevel wheels 33; 34,
shaft 21, worm 22, and worm wheel 23; the handle 24, through the intervention of
a friction clutch which can be put in or out of gear as required, acts directly upon
the shaft 21 for rotating the radial arm by hand, and a dividing disc 25 is pro-
vided as in the arrangement previously described.
In the arrangement shown in Figs. D, E, change wheels may sometimes be
substituted for the ratchet and pawl mechanism.
The Machine as shown and described in various modifications constitutes a
Horizontal Radial Drilling and Milling Machine in some cases the Machine may
be modified so as that the radial arm has a vertical axis and rotates in a horizontal
plane, and thus becomes a Vertical Radial Drilling and Milling Machine; in such
cases the Machine has only one radial arm, which is carried by a suitable standard,
and the work is held upon a horizontal base plate situated below the radial arm.
Machines constructed in accordance with the present improvements are specially
useful for drilling and tapping holes in the ends of Engine Cylinders for the cover
holding studs, and also for Milling the outside of the end flanges of the cylinders;
and as regards the holes in such cases, the use of the dividing mechanism enables
them to be drilled at any desired distance apart without the use of templates and
without "setting out."-Where two headstocks are employed on one base plate as
shown in Figs. A. B. C, both ends of a cylinder can be operated upon simul-
taneously, and all the holes and the milling mentioned, can be completed during
one "setting" of each cylinder.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In a Horizontal Radial Drilling and Milling Machine the mechanism for
moving the radial arm intermittently through given angular distances substantially

page_text: 2. In a Horizontal Radial Drilling and Milling Machine the adjustable centre
bar 7 substantially as shown and described, and for the purposes specified.
3. In a Horizontal Radial Drilling and Milling Machine the arrangement of the
wheels 13. 14. 15 substantially as shown and described for the purpose of per-
mitting the radial arm or arms (if there are two radial arms) to perform complete
rotations upon their axes.
4. In a Horizontal Radial Drilling and Milling Machine the employment of two
headstocks placed opposite to each other on one base plate and each carrying a
radial arm substantially as shown and described for the purpose of operating either
simultaneously or singly either upon two separate objects or upon two ends or
sides of the same object.
5. In a Horizontal Radial Drilling and Milling Machine the mechanism for
imparting automatic radial feed to the Milling tool substantially as shown and
described.
6. In a Horizontal Radial Drilling and Milling Machine the mechanism for
imparting horizontal feed to the drill spindle substantially as shown and described
and for the purpose specified.
7. The application as described of a Horizontal Radial Drilling and Milling
Machine upon the sliding table of a Planing Machine.
8. The general arrangement of a Horizontal Radial Drilling and Milling Machine
substantially as shown in Figs. A. B. C and described.
9. The general arrangement of a Horizontal Radial Drilling and Milling Machine
substantially as shown in Figs. A. B. C. and described, but subject to the
modifications shown in Figs. D. E and described.
Dated this 18th day of August 1885.