Improvements in Milling Machinery.
Year: 1895

page_text: Date of Application, 1st June, 1895
Complete Specification Left, 8th Aug., 1895-Accepted, 19th Oct. 1895
Improvements in Milling Machinery.
I, ROBERT FREDERICK HALL, Managing Director of The Cycle Components
Manufacturing Company Limited, of "Ferndale," Church Road, Moseley, in the
City of Birmingham, do hereby declare the nature of this invention to be as
follows:-
This invention relates to machinery for the milling or rotatory cutting of various
articles, such as cycle chain wheels, wheel hubs, bosses of cranks and other circular
or part circular and irregular shapes.
The principal object of the invention is a machine which will simultaneously mill
a number of articles and which can be attended to by a single operator.
The said machine works continuously during the taking off and putting on of the
work and is to an extent automatic as the operative can leave cutters operating
upon two or more articles whilst he is attending to another or to others.
Passing through the middle of a fixed bed or table, which is preferably supported
by legs, is an upright and divided main driving shaft, with the lignable sections
coupled together above the table by a coupling socket, longitudinally grooved upon
its upper inside end, within which groove a feather of the said shaft takes and
slides. The upper end of the shaft passes through the bearing of a hanger bracket
bolted to the ceiling of the workshaft, and is fitted with an overhead pulley and
friction clutch, operated by a jointed lever fulcrum on the bracket and with the
end provided with a pull for taking the clutch into and out of gear.
The sleeve of the coupling socket of the shaft is inside screwed and takes its
bearing upon a hardened steel bush surrounded by an eyed boss or bearing elevated
from the plane of the table, and having directed from it, radial arms, which are
made fast to the table by bolting. Passing up the middle of the hardened steel
bush and worming into the lower screwed end of the coupling socket, is the stalk
of the lower section of the main driving shaft, which passes centrally through the
middle of the table and carries a single and central cutter, whose lower side comes
upon the shoulder or step of that part of the shaft which comes just above the
plane of the table, so that as the shaft rotates from right to left, and turns with it
the socket coupling the inside screwing of which always keeps the cutter dead up
to the shoulder of the shaft and steel bearings within which it runs, whereby
rigidity and true running of the cutter, which comes between the said radial arms
and the table, is attained.
This centrally mounted cutter acts in common upon the whole of the articles
under operation.
Mounted upon the table are a series of two, three or other number of radial
slides, working within suitable gaps, and carrying at their inner parts, holders,
which are rotated in opposite directions to the cutter, for carrying the work.
These slides are propelled and repelled by hand screws, working through screw
boxes and swivelly connected to the slides, each of which also carries a stop gauge,
consisting of a rod, with the inner end tapped into the slide and the other end,
inward of a head or nut, taking and sliding through a bracket near the edge of the
table, and following the movement of the slide, whereby a positive stop motion is
attained.

page_text: Assuming that an article is traversed by the holder, the exact amount of the
milling is regulated by the extent to which the stop will allow the slide to approach
the milling tool.
Each holder is carried by a vertical spindle, having at that end of it coming
under the table, a tangent wheel with which a screw on the inner end of a horizontal
counter spindle, having a pulley at its other end, engages. This counter-spindle is
driven by a band passing over the said pulley and around a second pulley coming
under the first one and mounted upon the end of a counter-shaft, working within
bearings carried by the legs of the table and having at its inner end a bevel wheel,
engaging with a like bevel wheel on a sleeve connected by a feather to the lower
end of the main shaft, which takes its bearing and thrust upon the end of a vertical
pin passing through a bracket or bearer placed thereunder, so that the shaft admits
of a vertical adjustment.
The said sleeve of the bevel wheel is supported by a socketted middle part of
the bearer bracket, whilst it is understood that the bevel wheel upon the sleeve
meshes in common with the bevel wheels on the countershafts, which are equal in
number to the slides employed.
Assuming that a chain wheel has been placed upon each one of the holders, then
the operative passes forward one of the slides to the extent allowed by the stop,
which if necessary may be adjustable. Cutting of this article then progresses
whilst the operative is passing the next article up to the cutter and so on, until he
comes round again to the first one, which, being sufficiently milled, is now removed
from the machine, a fresh article substituted for it and taken up to the cutter, the
milling of the other articles under operation proceeding all the while without any
interruption.
When the part of the article to be milled only comprehends an are, then the
holders carried by the radial slides will only make a partial rotation and then
stop, or be made to make a return movement by throwing-out gear or reversing
mechanism.
On the other hand, assuming the article to be milled is of an irregular figure,
then propose to control the slide which carries the work by the end of a lever
whose other end follows the outline of a former or dummy corresponding in shape
to the shape which the milled article is to have, or the slide may be controlled by
a former or dummy which governs the movement of the slides and the shaping of
the work carried by them.
Dated this 31st day of May 1895.
Improvements in Milling Machinery.
I, ROBERT FREDERICK HALL, Managing Director of The Cycle Components
Manufacturing Company Limited, of "Ferndale," Church Road, Moseley, in the
City of Birmingham, 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 :-
This invention relates to machinery for the milling or rotatory cutting of various
articles, such as cycle chain wheels, wheel hubs, bosses of cranks and other circular
or part circular and irregular shapes.
The principal object of the invention is a machine which will simultaneously mill
a number of articles and which can be attended to by a single operator.
The said machine works continuously during the taking off and putting on of the

page_text: work and is to an extent automatic as the operative can leave cutters operating
upon two or more articles whilst he is attending to another or to others.
Passing through the middle of a fixed bed or table, which is preferably supported
by legs, is an upright and divided main driving shaft, with the lignable sections
coupled together above the table by a coupling socket, longitudinally grooved upon
its upper inside end, within which groove a feather of the said shaft takes and
slides. The upper end of the shaft passes through the bearing of a hanger bracket
bolted to the ceiling of the workshop, and is fitted with an overhead pulley and
friction clutch, operated by a jointed lever fulcrum ou the bracket and with the
end provided with a pull for taking the clutch into and out of gear.
The sleeve of the coupling socket of the shaft is inside screwed and takes its
bearing upon a hardened steel bush surrounded by an eyed boss or bearing elevated
from the plane of the table, and having directed from it, radial arms, which are
made fast to the table by bolting. Passing up the middle of the hardened steel
bush and worming into the lower. screwed end of the coupling socket, is the stalk
of the lower section of the main driving shaft, which passes centrally through the
middle of the table and carries a single and central cutter, whose lower side comes
upon the shoulder or step of that part of the shaft which comes just above the
plane of the table, so that as the shaft rotates from right to left, and turns with it
the socket coupling the inside screwing of which always keeps the cutter dead up
to the shoulder of the shaft and steel bearings within which it runs, whereby
rigidity and true running of the cutter, which comes between the said radial arms
and the table is attained.
This centrally mounted cutter acts in common upon the whole of the articles under
operation..
Mounted upon the table are a series of two, three or other number of radial
slides, working within suitable gaps, and carrying at their inner parts, holders or
tables which are rotated in opposite directions to the cutter, for carrying the
work. These slides are propelled and repelled by hand screws, working through
screw boxes and swivelly connected to the slides, each of which also carries a
gauge stop consisting of a rod, with the inner end tapped into the slide and the
other end, inward of a head or nut, taking and sliding through a bracket near
the edge of the table, and following the movement whereby a positive stop motion
is attained.
Assuming that an article is traversed by the holder, the exact amount of the
milling is regulated by the extent to which the stop will allow the slide to approach
the milling tool.
This
Each holder is carried by a vertical spindle, having at that end of it coming
under the table, a tangent wheel with which a screw on the inner end of a
horizontal counter-spindle, having pulley at its other end, engages.
counter-spindle is driven by a band passing over the said pulley and around a
second pulley coming under the first one and mounted upon the end of a counter-
shaft, working within bearings carried by the legs of the table and having at
its inner end, a bevel wheel, engaging with a like bevel wheel on a sleeve
connected by a feather to the lower end of the main shaft, which takes its
bearing and thrust upon the end of a vertical pin passing through a bracket or
bearer placed thereunder, so that the shaft admits of a vertical adjustment.
The said sleeve of the bevel wheel is supported by a socketted middle part of
the bearer bracket, whilst it is understood that the bevel wheel upon the sleeve
meshes in common with the bevel wheels on the counter-shafts, which are equal in
number to the slides employed.
Assuming that a chain wheel has been placed upon each one of the holders, then
the operative passes forward one of the slides to the extent allowed by the stop,
which if necessary may be adjustable. Cutting of this article then progresses
whilst the operative is passing the next article up to the cutter and so on, until he
comes round again to the first one, which, being sufficiently milled, is now removed
from the machine, a fresh like article substituted for it and taken up to the cutter,

page_text: the milling of the other articles under operation proceeding all the while without
any interruption.
Assuming the article to be milled is of an irregular figure, then I propose to
control the slide which carries the work by the end of a lever whose other end
follows the outline of a former or dummy corresponding in shape to the shape
which the milled article is to have, or the slide may be controlled by a former or
dummy which governs the movement of the slides and the shaping of the work
carried by them, alike unto the machine referred to in the Specification of a former
Letters Patent granted conjointly to Charles Taylor & myself and dated the
10th day of October 1894 No. 19211.
Figure 1 of the accompanying drawing represents partly in vertical section and
partly in elevation, a milling or circular-cutting machine with its accessory parts
constructed according to my invention.
Figure 2 represents a vertical section of the upper and slide part of the machine
upon the dotted line a Figure 1, looking outwardly. This view shows the means of
driving the work from off a countershaft.
Figure 3 is a horizontal section of the said machine upon the dotted line A,
looking downwards.
Figure 4 represents a vertical section of Figure 3 upon the dotted line B, locking
inwardly.
Figure 5 is a horizontal section upon the dotted line C Figure 1, looking
upwards.
Figure 6 is a horizontal section upon the dotted line D Figure 1, but looking
downwards.
Passing vertically through the middle of a fixed bed a, which is supported upon
the underside by upright legs a¹, having feet a², is an upright and cross split or
divided main driving shaft b, consisting of upper and lower sections 61, 62, coupled
together above the bed by a coupling c, socketted and inside grooved at its upper
end c², within which socket and its groove, the lower feathered end 63, 64, of the
section 6, of the shaft, takes, and is capable of sliding therein but carrying the
coupling with it in its rotatory movement.
The said upper part of the shaft b, which has an overhead driving pulley 65, and
clutch e, for throwing the shaft into and out of gear, turns within bearings d', d2, of
a hanger bracket d, bolted to the ceiling of a workshop. The clutch e, is operated
by a lever e', pivoted at e².
The coupling c, connecting the upper and lower sections of the shaft is inside
right-hand screwed at c at its lower part into which takes a like screwed stalk 66,
partly surrounded by a loose hardened steel-clamping bush f, located within a
vertical socket bearings g of an elevated and armed bridge-bracket g, boited at
the ends of its ends 9%, to the bed a. Also passing partly up the steel bush,
is a plain part of the spindle ', with a shoulder 68, between which and the
underside of the said loose bush f, a rotatory milling tool or cutter h, is threaded
and is made to turn with the lower part 63, of the shaft by the impingement and
frictional contact between the said bush and the shoulder, the said cutter being
brought dead home to its bearing by the upper part of the shaft turning with it the
slightly traversing coupling which, when rotated in a forward direction, screws
itself upon the wormed end 66, and is thereby made to advance and impinge upon the
bush, which in its turn, bears upon the cutter and clamps the same firmly to the
shaft, although if necessary the said cutter may take upon a feather formed on
the part of the stalk of the shaft which it surrounds.
The extreme lower part 610, of the shaft, has a feather 6, upon it, and
surrounding the feather and shaft is a loose bevel wheel 68, which gears in common
with three bevel wheels i¹, each made fast to the inner end of a shaft i, passing
through bearings 2, of legs a', and with the outer ends of each of the said shafts
having long driving pulleys i, around which a band, taking also over a pulley, fast
to the outer end of a traversing counter-shaft j, working in a hanging bracket a³,
carried by the slide m, passes. Each of these countershafts j, have worms j³, at

page_text: their inner ends, meshing with a worm wheel j, made fast upon an upright
shaft j, working through a bearing m³, of a slide rest m, traversing the gap a³, in
the bed a, and held therein by guide strips m³, adjustably brought up to the
chamfered sides of the slide by inclined-headed pins m³. The slides are traversed
by traversing screws n, having hand wheels n², for their operation, and having
their inner ends n', swivelly connected to the slides, and their middle parts passing
through screw boxes of a bolted on strip o¹, secured to the fixed bed a.
The vertical shafts, carry work tables, at their summits, to which the work k,
is secured by a bolt, or otherwise, whilst each slide is limited in its inward traverse
i.e. towards the work, by a gauge stop p, whose inner end is fixed in the slide and
the other end passed through a hole o², in the strip o', whilst the extreme outer
end of the stop rod has a head pl, which comes against the face of the strip o', and
forms the stop.
Thus, assuming that an article carried by the rotatory table requires to be
milled, dressed or cut-down to a certain extent by the rotatory cutter, the amount
of milling which it shall receive is regulated by the extent which the stop will allow
the slide carrying the work to traverse towards the cutter.
Each machine is provided with a number of different stops, varying in length to
correspond with the kinds and depths of cut to be given to the work.
Referring again to the lower end of the shaft, the same works within a
supplementary socket 9, supported, through the intervention of anti-friction
balls q, by a socketted cross bearing g', bolted to the legs of the framing a¹, and
with the vertical shaft adjusted and kept up to its work by a pin q³.
Assuming that articles to be operated upon are secured to the work tables, and
assuming that the said tables are away from the cutter, then the operative starts.
the machine by throwing the clutch into gear, when the cutter is rapidly rotated
and the work tables, with the work, are slowly turned. The operative then brings
the work on one table up to the cutter by turning the hand wheel of the
traversing screw of the slide and immediately the work has been gapped, the
operative then leaves the cutting to proceed automatically whilst he attends to
the bringing of the next slide with its work table and work thereon up to the cutter,
which acts in common on the several sets of work under operation. He then brings
up the third piece of work and comes again to first piece, and if the milling or cut
should require to be deepened then he propels the slide further and the cutting
proceeds to a greater extent, which may be limited by the gauge stop.
Should however the first piece of work have been fully milled, the depth of cut
having been regulated by the gauge stop, the operative re-rotates the hand wheel,
when the slide is withdrawn and the work is taken out of the range of the cutter
and removed from the table and fresh work substituted for it, when the operations
described are repeated.
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. In milling or circular cutting machinery, disposing the milling tool or
rotating cutter in a central position, and arranging around the same, radially-traversing
work-carrying slides, whereby two or more sets of work are operated upon at the
same or dis-similar times, substantially as described and set forth.
Secondly. A milling or circular cutting machine, having a vertical shaft with a
rotating cutter mounted thereon and surrounded by two, three, or more radially
disposed and working work-carrier slides, propelled and repelled up to and from
the cutter by traversing screws, and with the said slides carrying rotatory work-
tables driven by gear, substantially as described and set forth.
Thirdly. In milling or circular cutting machines, making the vertical shaft in
two sections, with the opposed ends respectively feathered and screwed and united
together by a coupling which both connects the sections of the shaft and, through
.

page_text: the intervention of a steel bush, brings the cutter dead home upon a shoulder of the
said shaft, substantially as and for the purpose described and set forth.
Fourthly. In milling or circular cutting machines, providing the traversing
work-carrying slides with gauge stops, for the purpose of limiting the depth of
the cut on the articles under operation, substantially as described and set forth.
Fifthly. In milling or circular cutting machines, the combination with two or
more radially traversing work-carrying slides adapted to approach in common a
single rotating cutter, of traversing gear for rotating the work-carrying tables,
substantially as described and set forth.
Sixthly. In milling or circular cutting machines, the means for driving the
principal cutter-shaft in combination with the means for driving the rotating
work-carrying tables, substantially as described and set forth.
Seventhly. The general construction arrangement and combination of the parts
of milling or circular cutting machines, less the driving gear and their bearings and
the clutch mechanism, substantially as described and set forth.
Eighthly. The general construction arrangement and combination of the parts
of milling or circular cutting machines, substantially as herein described and set
forth.
71
1
.
1005
ROBERT FREDERICK HALL,
By Henry Skerrett,
24 Temple Row, Birmingham, Agent for Applicant.