Improvements in or relating to Skiving Machines.
Year: 1894

page_text: Date of Application, 5th June, 1894-Accepted, 14th July. 1894
Improvements in or relating to Skiving Machines.
1 HERBERT JOHN HADDAN, of the Firm of Herbert Haddan and Co. of
18, Buckingham Street, Strand, W.C. London, Patent Agent, do hereby declare
the nature of this invention, a communication to me from abroad by The Scott
Shoe Machinery Company of 186, Grand Street, New York, United States of
America, 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 certain improvements in skiving machines as pointed
out in the following Specification and claim and illustrated in the annexed drawing
in which
Figure 1 represents a front view.
Figure 2 is a plan or top view.
Figure 3 is an end view looking in the direction of arrow 1, Fig. 1.
Figure 4 is a transverse vertical section in the plane w w Fig. 1.
Figure 5 is a similar section in the plane a Fig. 1.
Figure 6 is a partial transverse vertical section in the plane y y Fig. 1, showing
the means for adjusting the knife.
Figure 7 is a longitudinal section of a portion of the feed wheel and the
gravitating clearers, the plane of section being indicated by the line z z Fig. 4.
Figure 8 is an elevation of the die roller and end gage detached.
Figure 9 is an end view of the die roller, feed wheel and knife, showing the edge
gage with the cam groove for actuating the end gage.
Figure 10 is a horizontal section in the plane a Fig. 4.
Figure 11 is an end view of the inner bearing of the knife head on a larger scale
than the previous figures.
Figure 12 is a plan view of the blank for a counter stiffener.
Figure 13 is a transverse vertical section in the plane y¹ y¹ Fig. 7.
In this drawing the letter A designates the base of a frame which is supported
by a column B or any other suitable means.
From the base A rise three
standards C, D, E and the standards D E are connected by a vertical web F, all
these parts being cast integral or formed in any other suitable manner. The
standards DE form the bearings for a shaft G on which is firmly mounted the cog
wheel c which engages a cog wheel & mounted on the driving shaft I which has its
bearings in the standard E and on which is loosely mounted a belt pulley e which
can be thrown in gear with the shaft I by means of a clutch-sleeve f. This clutch-
sleeve is feathered on the driving shaft and it is actuated by means of a lever g
mounted on a bracket h which extends from the base A and which can be secured
in the desired position by means of pin i. In the standards D E is also mounted a
shaft J which forms the bearing for a bifurcated lever K in the upper ends of
which is mounted a shaft H which is geared with the shaft G by the cog wheels ba.
The lever K is exposed to the action of two set screws kk by means of which it
can be adjusted and locked in the required position. The shaft G carries the die
roller L and the shaft H the feed roller M. By means of the set screws k k the
feed roller can be adjusted at the required distance from the die roller.
In the surface of the die roller L is formed the die 1 and in the body of said die
roller is formed a cavity to receive the end gage m. (Fig. 8.)
On the top of the standard D is secured a bracket P which carries the edge
gage p.
Qis the knife which is secured to a head R and can be adjusted and locked in
the required position by screws qq and set screws q'g'. The knife head R is

page_text: mounted on a shaft which has its bearings in the standards C D and from this
head extends a toothed segment 1 which engages a worm screw s mounted in a
lever S (best seen in Fig. 4) which swings on an arbor s¹ and is exposed to the
action of a set screw s². By means of the worm screws the cutting edge of the
knife can be adjusted at the required distance from the die roller L and by means
of the screw the worm screw can be forced up firmly against the toothed
segment so as to lock the knife in the required position.
By referring to U.S. Patent No. 493,189 dated March 7, 1893, it will be found
that all the parts referred to in the foregoing description are contained in the
machine described in the above-named Patent, and I have found that the machine
constructed according to this Patent works perfectly well for a large number of
articles which can be skived by means of dies rising above the surface of the die
roller L. But for many articles such for instance as counter stiffeners it is
preferable to use dies 7 which are sunk into the surface of the die roller and I have
found that in order to be able to produce perfect work in skiving such articles,
certain alterations had to be made in the mechanism as hereinafter described.
As already stated the die roller L is provided with a cavity (Fig. 8) to
receive the end gage m.
This cavity extends in a radial direction as indicated in
Figs. 4 and 9 so that the end gage can be moved out to the position shown in
Fig. 4 or that it can be pushed in far enough to clear the knife the cutting edge
of which may be situated quite close to the surface of the die roller as shown in
Fig. 9. For the purpose of imparting the required motion to the end gage,
a roller stud 15 is provided which projects from the outer edge of the end gage at
a distance from its outer end as shown in Figs. 4, 8 and 9 and this roller stud
engages a cam groove 16 formed in the face of the edge gage p. This cam groove
is made in such a way, that the roller stud 15 fits the same closely except between
the points 17 and 17* (Fig. 9) where the change in the position of the end
to take place.
gage is
At this point the cam groove is wide enough to give the roller stud 15 a certain
play in a radial direction so that when the roller stud reaches this portion of
the cam groove the end gage m can be pushed back from the position shown in
Fig. 4, to that shown in Fig. 9 by the action of the feed wheel M and as soon.
as the teeth of the feed wheel have taken hold of the blank, the roller stud 15.
strikes the point 17 of the cam groove and the end gage is moved inward so as
to clear the knife. After the knife has cut through the blank and when the
die roller has reached the position shown in Fig. 4, the end gage m is far out
so that the operative can hold the end of the next blank firmly against the end
gage and since the end gage is not drawn back, until the teeth of the feed
wheel have taken a firm hold of the same, the blank cannot be. pushed in beyond
the desired position and the danger of miscutting or spoiling the blank is avoided.
Another device which has been added to the machine described in Patent
No. 493,189 has for its object to adjust the edge of the blank automatically in the
proper relation to the die, such device being required for instance when the
machine is used for producing counter stiffeners. By referring to Fig. 12 of
the drawing it will be seen that the inner edge 18 of the blank for a counter
stiffener is curved and the ends of the die 7 (see Fig. 2) are necessarily at a greater
distance from the edge gage p than the intermediate portion. In introducing the
blank into the machine the operative places the front end of the blank upon the
end gage m (Fig. 4) while the edge of the blank at its front end is brought to bear
against the edge gage p as indicated in dotted lines in Figs. 1 and 2 and if it is
left in this position, the blank may not be exactly in the proper position towards
the die . For the purpose of adjusting the blank automatically in the proper
position towards the die before the feed wheel begins to act upon the same, I use
à cam 19 which is secured to the arms 20 of the cog wheel c, as shown in Figs. 3
and 4 which show face views of the cam, while Figs. 1 and 2 show side views of the
same. This cam 19 acts upon a roller stud 21 which is secured to a lever 22 (best
seen in Figs. 2 and 5, also in dotted lines in Fige. 3 and 4). This lever has its

page_text: fulcrum on a pivot 23 secured in a bracket 24 which is fastened to the standard E.
(Fig. 5). From the free end of the lever 22 extends a rod 25 through a bracket 26.
which is secured to the standard E and from which extends a yoke 27 which
carries an eye 28 so that room is obtained for a spring 29 which is placed upon the
rod 25 (Fig. 1) and the tension of which can be adjusted by means of a collar 30-
and set screw 31. On the front end of the rod 25 is secured a head 32 which can
be adjusted by means of a set screw 33 and which carries a rod 34 which extends.
through an opening in the edge gage p. At the moment when the die roller bas
reached the position shown in Figs. 2 and 9, the high point 35ª of the cam 19.
(Fig. 2) acts upon the roller stud 21 and the rod 34 is moved forward so that it.
acts upon the edge of the blank and adjusts the same in the proper position in:
relation to the die 7. The spring 29 has a tendency to force the roller stud 21
towards the face of the cam 19 and the throw of the rod 34 can be adjusted by
means of the head 32.
When the die roller L is provided with a sunken die it is very desirable in:
order to produce correct work, that the cutting edge of the knife shall be exactly
parallel to the face of the die roller as indicated in Fig. 10 of the drawing and also
that the distance between the cutting edge and the surface of the die roller can be
rapidly and minutely adjusted. In order to effect these purposes I have provided
the shaft of the knife head at its inuer end with an eccentric journal 35 (see
Figures 10 and 11) and I have made the bearings of the shaft oblong in cross.
section, the bearing 36 for the outer end of said shaft being shown in Fig. 3 and
the bearing 37 for the inner end of said shaft being shown in Fig. 6 and I have
provided set screws 39 for adjusting and securing the journal in the oblong-
bearing 36 and set screws 40 for adjusting and securing the journal in the oblong
bearing 37. By referring to Figures 1 and 10 it will be seen that the outer end of
the shaft extends beyond the standard C and in its projecting end is made a.
hole 41 so that a pin can be inserted for the purpose of turning the shaft in its.
bearings. Of course any other suitable means can be used for turning the shaft.
If the shaft r is turned in its bearings, it turns round the centre 42 (Fig. 11) of
the eccentric journal 35 and the centre 43 of the body of said shaft is moved
towards or from the die roller according to the direction in which the shaft is..
turned. For instance if the shaft is turned in the direction marked on it in
Figure 11, the centre 43 of its body is moved towards the position 43°. Of course
before the shaft r can be turned, the set screws 39 and 40 must be released and.
after the shaft has been turned, the set screws are tightened. By turning the
shaft the cutting edge of the knife is bodily moved toward or from the die.
roller, but if the cutting edge should not be exactly parallel with the surface of
the die roller, the defect can be remedied by means of the set screws 39 and 40,.
by means of which either one or the other journal of the shaft r can be moved
towards or from the die roller.
The feed roller M is composed of a series of disks 44 (Fig. 7) each of which.
is formed with a short hub 45 and these hubs form the bearings for clearing
blades 46 which are hung loosely thereon so that the same when permitted to
follow their inherent.gravity assume the position shown in Fig. 4. The feed
roller is protected by a guard N (Figs. 2 and 4) and each of the clearing blades
is provided with a spur 46* (best seen in Fig. 4). If at any time the teeth of
the feed roller become choked, one or more of the clearing blades will be carried
up and as the spurs 46* strike the front edge of a stop composed, as here shown,.
Oof the guard N, while the movement of the feed roller continues, the impurities.
will be thrown out and the clearing blades will return to their normal position.
5
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination with the die roller, the feed roller, and the knife, of an:

page_text: end-gage movably fitted into the die roller and a stud 15 projecting from the-
end-gage and made to engage a cam groove 16, substantially as described.
2. The combination with the die roller the feed roller and the knife of an end'
gage movably fitted into the die roller, a stud 15 projecting from the end gage and
made to engage a cam groove 16 arranged in the edge gage and having an open
space 17, 17* to permit the feed roller to push back the end gage and take hold of
the blank substantially as described.
3. The combination with the die roller, the feed roller, the knife and the edge
gage, of a pusher 34 for adjusting the blank automatically in relation to the die
and means for actuating the pusher-substantially as described.
4. The combination with the die roller, the feed roller, the knife, the edge gage
and the pusher 34 of a cam for moving the pusher forward and a spring for
retracting the same substantially as described.
5. The combination with the die roller, the feed roller, and the knife of a
rocking knife-head provided at opposite ends with projecting journals, one of which
is eccentric to the other, bearings oblong in cross section into which the journals
fit and in which said journals are adapted to turn, and means for locking the
journals in any desired position, substantially as described.
6. The combination with the die roller, the feed roller, and the knife of a
rocking knife-head provided at its opposite ends with projecting journals, bearings
oblong in cross section in which the journals are adapted to turn, and devices
engaging the journals for locking them in any desired position, substantially as
described.
7. The combination with a knife, and a die roller, of a shaft carrying a feed roller
composed of sections, gravitating clearing blades encircling the shaft between the
roller sections, baving spurs or projections and swung upward by choking of the
feed roller, and a stop arranged in the path of the spurs or projections on
the clearing blades for arresting their upward swinging motion, substantially as
described.
8. The combination substantially as herein described with the knife and the die
roller of a feed roller made in sections, hubs formed on the sections and clearing
blades hung on these hubs. .
9. The combination with the knife and the die roller of a feed roller made in
sections, hubs formed on the sections, clearing blades hung on these hubs, spurs 46*
extending from said clearing blades and an abutment N in the paths of these spurs
substantially as described.
Dated this 5th day of June 1894.