Improvements in Apparatus for Milling Profiles.
Year: 1895

page_text: Date of Application, 17th Oct., 1895
Complete Specification Left. 12th June, 1896-Accepted, 25th July, 1896
Date of Application
Complete Specification Left. 12th June, 1896-Accepted, 25th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Milling Profiles.
THOMAS WEBSTER and JONATHAN HOWARTH Engineers Atlas Works West
Orchard Coventry do hereby declare the nature of this invention to be ns
follows:-
Our invention comprises an attachment, which can be applied to any ordinary
turning lathe (in such case taking the place of the saddle & compound slides) and
by the use of which the internal and external curves of any small objects, such as
the fork crown, ball head lugs, and seat lugs and like parts of cycles can be milled
or profiled to desired shape automatically.
Briefly the attachment consists of a transverse lathe bed slide upon which is
mounted a headstock (parallel with the ordinary fast headstock of the lathe) fitted
with a spindle, which receives its motion through worm gearing, by means of a
pulley on worm shaft; this pulley being belted with a countershaft; the pulley on
the worin shaft is connected to the worin shaft, by ineans of a clutch, which can be
automatically thrown out of gear with the worm shaft at any desired point of the
traverse of the headstock slide; to the spindle of the slide headstock is chucked
the object to be shaped; also on the nose of this same spindle is mounted a former
or cam of a shape or profile similar to the required profile, but proportionately
larger; this former presses against a pointer fixed to a rigidly mounted bracket on
the lathe or machine bed, the former being kept up to the mounted pointer by
means of a weighted lever and link, connected to the head slide. By means of the
former pressing up against the pointer, on rotation of the headstock spindle, the
headstock and its slide are inoved backward or forward according to the shape of
the former employed, while at the same time the object to be shaped receives a
rotary motion by means of the same spindle as which the former is mounted upon,
as before stated. The headstock slide being mounted on the lathe or machine bed
in such a manner, that the objects to be profiled can be brought into contact with
a revolving mill or cutter chucked to the spindle of the lathe or machine fast
headstock by means of the cutter in conjunction with the movements of the
sliding headstock governed by the former used, the objects to be profiled may have
the desired shape imparted to them.
Means are also provided whereby the work in hand can be put into or taken out
of contact with the cutter at any desired point of the operation; to enable the
operator, who may operate several of the machines, to have complete control over
the work in hand.
This attachment or apparatus may also be used as an automatic profiling
machine, independently from its services as an attachment, and differs from other
machines of like kind by reason of its automatic arrangements.
Dated this the Sixteenth day of October 1805
THOMAS WEBSTER.
JONATHAN HOWARTH.

page_text: improvements in Apparatus for Milling Profiles.
We, THOMAS WEBSTER and JONATHAN HOWARTH, of Atlas Works, West
Orchard, Coventry, in the County of Warwick, Engineers, do hereby declare the
nature of this invention and in what manner the same is to be performed, to ho
particularly described and ascertained in and by the following statement :—
This invention comprises an attachunent, which can be applied to any ordinary
turning lathe (in such case taking the place of the saddle and compound slides)
and by the use of which the internal and external curves of objects, such as the
fork crown ball head lugs, and seat lugs, and the like parts of cycles, can be milled
or profiled to desired shape automatically. In order to more clearly explain this
our invention we have appended hereunto illustrative sheets of drawings upon
which are figures and numbers of reference, similar numbers referring throughout
the several views to the same thing or part.
Fig. is a general view of this our invention.
Fig. 2 is a plan view of most of the parts of the invention.
Fig. 3 is an end view of same.
Fig. 4 is a part view in detail showing a differently shaped body being operated
upon from that shown in Figs. 1 & 2.
Fig. 5 is an end view on line A—B Fig. 4.
Fig. 6 is a detail view showing certain position in which an accommodating
motion of the slide carrying the work, takes place as hereinafter explained.
Fig. 7 is a detailed view of the mechanism by which the accommodating motion
of the said slide is effected.
Fig. 8 is an inverted part plan view of the mechanism by which the slide is
drawn back and held in its withdrawn position while the changing of the work &c.
takes place.
This arrangement of mechanism may be used upon an ordinary lathe bed in
conjunction with the ordinary headstock, but preferably we form the headstock
and bed in one in the manner of what is known as a profiling or milling machine,
and hence we have thus illustrated it for explanation. Upon the frame bed 11, is
mounted the saddle 12, which in some cases (according to the work in han 1) is
securely bolted at a given position to the frame bed. Upon this saddle is carried
the transverse slide 13 upon which is mounted or formed the headstock 14 fitted
with the spindle 15 which receives its motion by means of the worn wheel 16,
operated by the worm 17 and the spindle 18 which is driven by the pulley 19, the
Eaid pulley being belted in the ordinary manner from a countershaft
Upon the
spindle 15 is placed the cone clutch 20 which slides upon the feather key 21.
This cone 20 fits into and engages with or is released from the wheel 16 by means
of the screw hand wheel 22. Thus when the said handwheel is screwed inwards
the cone 20 is driven into the wheel 16 and motion is imparted to the spindle 15,
while if the said wheel 22 is withdrawn, the cone disengages itself from the worin-
wheel 16 and the spindle 15 is then idle. To the front end of the spindle 15 is
chucked the piece of work 23, which has to be operated upon, and which is
illustrated in Figs. 1 and 2 as a ball head lug, and in Figs. 4, 5, & 6 as a double
plate crown for cycle fork; also on this same spindle is carried the former or
cam 24 of a shape or profile similar to the required profile of the body 23, and of a
size convenient to admit of chucking the body 23 &c. Upon the frame bed 11
is rigidly secured the bracket 25 upon which is further mounted the pointer
(preferably a roller) 26 which is adjustably secured thereto by means of the
bracket 27 and pins 28 & 29. The former 24 is kept firmly up against the
roller 26 by means of the chain 30 the one end of which is secured to the transverso

page_text: slide 13 at 31 (upon which the former &c. is carried) and the other end to the
weight 32, over the pulley 33. By means of the former 24 pressing up against
the pointer, on rotation of the headstock spindle 15, the headstock and its slide are
moved in or out (transversely) according to the shape of the former 24 employed,
while at the same time the object 23 to be shaped, receives a rotary motion by
means of the same spindle 15 as before stated, and thus the objects 23 are brought
into contact with a revolving mill or cutter 34 chucked to the spindle 35 of the
Inthe or machine, so that by means of the said cutter in conjunction with movements
of the sliding headstock 14 &c., the said objects 23 may have the desired shape
imparted to them.
In some cases the shapes desired may be such that when passing certain points
there may be some danger of breaking the former and the roller, and also the
mill or cutter, as for instance, as illustrated in Fig. 6 where the former &c. is
revolving in the direction of the arrow 36, it will be seen that unless the
former 24 and the body 23 were moved somewhat transversely in the direction
of the arrow 37, either the spindle 15 could not revolve, or the mill or cutter
or roller or roller bracket, must be broken. To obviate this we provide upon
the wheel 16 the sleeve plate 38 having the clutch pin 39 by which it may be
engaged with the said wheel 16 in any of the holes 40. Also on this plate is
fixed the stud pin 41. The diametric stud pin 41 forms the carrier for the
pin 39.
In conjunction with these stud pins the bracket 42 is also secured to
the bed 11, having the inclined path at 43. Hence when the former 24 has
reached the position shown in Fig. 6 (as before stated) the pin 41 or 41" has
reached the bracket at 43, see Fig. 7, which bas a tendency to stop the rotation
of the spindle 15. By reason however of the persistency of the said spindle 15
to rotate, the pin 41 or 41 is forced up the path 43, but in doing so the
slide 13 with all that is thereon carried, is compelled to yield forwards
against the pull of the weight 32, and thus the necessary sliding motion as
indicated by the arrow 37 is effected to allow of the tool 34 and roller 26 passing
over such parts as 44 & 45. The length of this path 43 is regulated so that
immediately the shoulders 44 and 45 are passed, the pin 41 or 41° passes on its
usual retary course. It will therefore be seen that the rotating motion of the
spindle 15 is arrested for a short time when passing the point shown in Fig. 6,
by the wheel 16 slipping upon the clutch 20 until the parts 44 and 45 have
respectively passed the tool 34 and roller 26. Owing to this a certain loss of
relative motion of the spindle 15 to the wheel 16 takes place, hence we provide
a number of holes 40, so that when the pin has passed the path 43 sufficiently
far, we withdraw the clutch pin 39 and move the plate 38 backwards, and put
the pin 39 into the next hole ready for the next necessary similar operation.
Should the pin 4 arrive however at the path 43 before the tool 34 arrives at
the part 44, the slide would be moved forward as before stated, and thereby
the work be simply removed for the time being from the cutting tool, but no
barin would ensue, while if on the other hand the tool 34 should arrive at that
point before the pin 41 arrives at the path 43, then the wheel 16 gives way on
the clutch 20 (the spindle 15 ceasing to revolve) until the pin 41 commences to
climb the path as aforesaid, but by observing the arrangement shown these
contingencies rarely occur.
In some cases when the body 23 has reached a certain point in rotation, such
as in part circular bodies, it is desirable that such rotation should cease. This
we effect as follows:-Upon the pulley 19 we provide a clutch 46 to engage
the sliding clutch 47 which latter is made to slide upon a feather key upon the
spindle 18, the said pulley 19 being loose upon the said spindle. The clutch 47
is kept up to its work by the spring 48. This clutch is further operated by
the fork lever 49 pivoted to the saddle at 50. At the lower part of this lever is
formed the slot hole 51, in which is an adjustable screw pin 52 which may be
secured in any desirable position along the said slot. Upon the saddle is further
secured the fixed stud 53 whose projecting part lies in the slot 51.
It will now

page_text: be seen that at any point in the revolution of the spindle 15 where it is desirable
that the rotation should cease, it will be only necessary that the screw pin 52
be adjusted to come in contact with the fixed stud 53 at the right time, by
reason of the shape of the former 24 being so arranged as to force forward the
slide 13 (which carries the spindle 18 and pulley 19). In so doing the clutch 46
is drawn forward in the direction of the arrow 54 Fig. 3. At the commence-
ment of the transverse motion, the clutch 47, follows the clutch 46 by reason
of the spring 48 turning the lever 49 upon its fulcrum 50, until the pin 52 is
arrested in its motion by the fixed stud 53 and the movement of the clutch 47
censes. By reason of the continued motion however of the clutch 46 the Intter
is withdrawn clear of the clutch 47 and the motion of the worin 17 and
spindle 15 is thereby stopped.
It is further desirable to provide that the work may be taken from the
machine at any desirable position of the cutter. To effect this we provide the
slot 55 in the slide 13 in which is secured the adjustable pin 56 having the under-
nenth plate 57. Fig. 8 shows an inverted plan of these parts.
Upon the
saddle 12 is fulcrumed the lever 58 upon the vertical spindle 59 at whose upper
end is also keyed the camlike lever 60 having the stud 61. It will therefore
be seen that when the plate 57 is secured in a given position by turning the
lever 58 through 180 degrees or thereabouts, the stud 61 is brought against the
plate 57 and forces it (together with the slide 13 and all that is carried thereon)
in the direction of the arrow 54 see Fig. 3, so that the work 23 is thereby quite free
of the mill or cutter 34, and may then be removed &c. As seen in Fig. 8 the
position of the stul 61 is such that the slide &c. would be supported in its
extended position until the lever 58 was intentionally removed. Reverting to
the former 24 as seen in Figs. 1 & 2, it will be seen that to meet the require-
ments of varying shapes of work to be operated upon, the said former may not
only be variously shaped upon its periphery, but may also be so shaped upon
its rear side as shown at 62, which surface then arts in combination with the
fixed roller or point 63 which is carried upon the bracket 27. The roller 63
is of the necessary length to prevent the cam on rear side of the former being
pushed backward by the spring 64 on the withdrawal of the slide 13. One or
both of the rollers 26 and 63 may be used if desired fixed. During the operation
of edge milling (the periphery cam 24 acting ou roller 26) the saddle 12 may
be securely fastened to bed, and roller 63 removed as shown in Fig. 4, when
the rear surface of the former 24 is acting on the roller 63 the saddle 12 is
not fixed to the bed 11 but is permitted the required freedom of longitudinal
motion in which case the rear surface of the foriner 24 is kept backward against
the roller 63 by means of the spring 64 carried on the rod 65 and lying between
the adjustable nuts or collars 66. and the depending bracket 67 upon the under-
side of saddle 12, and the roller 20 nets on the periphery of the former 24 (the
periphery in this case may be truly circular or otherwise) as shown in Fig. 2.
At 68 is a pointer which facilitates the fixing of the position of the former 24
and work 23, relative to the wheel 16 and plate 38.
Having now particularly described and ascertained the nature of this our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
1. In apparatus for milling profiles the combination with the frame or bed 11,
hendstock carrying tool 34, and saddle 12 of the transverse slide 13 having mounted
thereon the spindle 15, with former 24 and work 23, and wheel 16, worm 17 and
driving pulley 19, and bracket 25 carrying rollers 26 or 63, all arranged and
operating substantially as set forth and shown upon the drawings.
2. In apparatus for milling profiles the combination with the transverse slide 13
upon which is carried the former 24 and work 23 spindle 15 and actuating wheel 16
clutch 20 and hand wheel 22, of the plate 38 having the clutch pin 39 taking into
holes 40 and also having the stud pins 41 and 41ª one or both in combination" with

page_text: the path 43 upon the bracket 42 all substantially as shown and described and for
the purposes specified.
3. In apparatus for milling profiles the combination with the slide 13 carrying
the spindle 15, wheel 16, worm 17 and pulley 19 with clutch 46, of the lever 49
pivotted to the saddle 12 and having the slot 51 with pin 52 and controlled by
the stud 53 all substantially as set forth and illustrated and for the purposes
specified.
4. In apparatus for milling profiles the combination with the slide 13 having the
adjustable underplate 57, of the camilike lever 60.
Dated this 11th day of June 1896.
CHARLES T. POWELL,
Applicants' Agent.