Improvements in Skiving Machinery.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in Skiving Machinery.
A communication by CHARLES HENRY BAYLEY, of 105, Bedford Street, Boston,
in the State of Massachusetts, one of the United States of America,
Manufacturer.
1 ALFRED GEORGE BROOKES of 55 & 56 Chancery Lane, in the County of
London, Chartered Patent Agent 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 has for its object to improve the class of machine represented in
the Specification of Letters Patent granted to Charles Henry Bayley and dated
the 26th of July 1892, No. 13563.
In the machines of this class where the cutter is made adjustable towards and
from the work supporting or feed wheel, it is necessary for proper running of the
machine, that the angular position of the cutter shaft axis with relation to the
axis of its main driving shalt should remain always substantially constant, in order
that the connecting gears might mesh properly in whatever adjusted position the
cutter might be.
This was accomplished in said Patent by journaling the cutter shaft in a frame
made adjustable about a pivotal axis substantially coincident with the axis of its
main driving shaft, so that the connecting gears always properly mesh, whatever
be the extent of movement of the cutter about its pivot.
In the machine shewn in the Patent referred to, however, the plane or angular
position of the cutter with relation to the work-supporting or feeding wheel and
work thereon, varies in different adjusted positions.
To obviate this in the machine to be herein described, my correspondent has
constructed the machine in such a manner as to permit the relative position of the
cutter and supporting or feeding wheel to be varied to bring the cutter nearer to
or farther from said wheel, without changing the plane or angular position of the
cutter and without changing the position of the axis of the cutter shaft with
relation to its main shaft.
The machine is preferably constructed with the shaft of its supporting or feeding
wheel mounted in a frame or yoke so pivoted that it may be turned to move the
said wheel toward and from the disc cutter and in the plane of the said cutter,
without disturbing the mesh of the gear on the shaft of the supporting wheel
with its driving gear.
In the machine to be herein described, he has also mounted the cutter shaft in
bearings, the carrier for which is adjustable longitudinally with relation to the
axis of the shaft of the work supporting wheel, in order that the said cutter
shaft and its cutter may be moved longitudinally with relation to the work
supporting wheel to bring the axis of said cutter into proper position with relation
to the centre line of the scarves, which centre line varies with the varying depths
of scarves.
He has also further improved the said machine by providing the main shaft with
a non-metallic toothed gear to engage the gear on the cutter shaft.
Fig. 1 of the drawing, in perspective, shows the present invention applied to a
'machine of the class described.
Fig. 2 shows the wheel in section.
Fig. 3 a sectional detail taken on the line z. z Fig. 1, showing the manner of
mounting the adjustable cutter shaft carrier; and

page_text: Fig. 4, a detail looking at the face of the frame, the same showing the groove
therein and the slot for the clamping screw to be described.
The frame work A has suitable bearings for a shaft A' provided with a worm B
and a worm B'.
The worm B' engages a worm gear C fast on a shaft C' provided at its lower
end with a disc-like presser-foot C, said shaft being surrounded by a suitable
spring C³ which controls the effective pressure of said pressing disc upon the
material. resting upon the supporting or feeding wheel B8, to be described.
d' represents a disc cutter fast upon a cutter shaft d provided at its upper end
with a bevel gear d', said shaft being mounted in suitable bearings d³, a grooved
collar de fast on the shaft being entered by a forked block on a screw shaft dⓇ,
the rotation of which enables the cutter shaft to be moved longitudinally, as
desired.
The bearings for the cutter shaft form part of a block D pivotted upon a
stud screw D carried by the horizontally adjustable carrier D', said block being
made adjustable upon the said carrier by or through a slot D* in said block and a
screw D³ on the carrier and entering said slot.
The carrier D is tongued at its rear side to enter and slide in a suitable groove
in the frame of the machine, as best shown in Fig. 3, the said carrier being provided
with a rearwardly extended clamping screw D' arranged in a slot D' in the frame,
which slot permits the said carrier with its cutter shaft-carrying block D to be
adjusted horizontally or longitudinally of the work supporting wheel, the said
carrier being retained in adjusted position by means of the clamping screw D°. The
worm B engages a worm gear B fast on an upright shaft B' having at its lower
end a bevel gear B.
In this present embodiment of the invention the supporting or feeding wheel B
is mounted upon a rotary shaft B', but herein, instead of said shaft having bearings
fixed to the frame, it has bearings 2, 3, shown as carried by a yoke E pivotted upon
a stud E¹ secured to the frame in any suitable manner, as by a set screw e, the
longitudinal centre of said stud being substantially coincident with the longitudinal
centre of the shaft B', so that as said yoke is turned, as it may be when required,
about the said stud, the bevel gear E' fixed to said shaft may always remain
properly in mesh with the teeth of the bevel gear B on the shaft B', said shaft
acting as the source of motion for the shaft B'.
The frame E has adjustably connected with it by a screw F in slot f, a stand ƒ³,
upon which is adjustably mounted a gauge a carrying a spring a made adjustable
as to its effective pressure by an adjusting screw a*.
The stand carrying this gauge spring and adjusting screw is carried by the yoke
so as to partake of its movements, so that the said gauge and spring may follow the
supporting or feeding wheel in its adjustment, in preference to the frame carrying
them being made adjustable on the frame of the machine.
The frame-work of the machine has an ear 6 in which is an adjusting screw 7
having collars or shoulders at each side said ear, so that the said screw may be
rotated and yet not be moved longitudinally in the ear, the threaded inner end of
said screw entering a threaded hole in a nut or projection 8 secured to the yoke
-frame E.
The frame work or an extension 10 thereof, has a slot through which is passed a
clamp screw 12 which enters the bearing 3 of the yoke E, a shoulder acting against
the frame to bend said yoke in its adjusted position.
When this clamping screw is loose, the adjusting screw 7 may be rotated in one
or the other direction and move the supporting or feeding wheel B toward or from
the edge of the disc cutter d' or the longitudinal centre of the shaft d, to thus
compensate for any wear of the disc cutter by reason of grinding, or for any other
purpose, when adjustment of the space between the edge of the cutter and the said
wheel is desired.
To avoid the chattering noise due to the meshing of bevel gears, my corre-
spondent has in this instance of the invention provided the shaft A' with a bevel gear

page_text: made up of a hub h, to a projecting portion of which by suitable screws h¹ he has
attached a non-metallic bevel toothed plate /*, said toothed bevel plate engaging
the teeth of the bevel gear d.
He finds such a gear substantially noiseless, and it adds very materially to the
convenience as well as to the utility of the machine.
By mounting the cutter shaft carrying block D upon an adjustable carrier,
thereby making the said block adjustable longitudinally with relation to the work-
supporting wheel, I am enabled to so change the position of the axis of the cutter as
to bring the said axis always into proper position with relation to the centre line of
the skiving or piece of leather to be removed, that is, the position of said axis will
for the best results, necessarily be located in a more forward position for narrow
than for wider scarves.
My correspondent believing himself to be the first to provide suitable mechanism
by which the relative positions of the cutter and feeding or supporting wheel may
be varied to position the cutter nearer to or farther from the said feeding or
supporting wheel, without changing the plane of the cutter or the angle of the
cutter shaft axis with relation to the axis of its main driving shaft, this invention
is not limited to the particular construction herein shown for accomplishing this.
result, for the same obviously may be varied without departing from the spirit and
scope of the invention.
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 :-
1. In a skiving machine, the use of a cutter to skive the material, a rotating
work-supporting or feeding wheel, its shaft, and a yoke or frame therefor, and
adjusting devices to adjust said yoke or frame toward and from said cutter and in.
a plane parallel with the plane of said cutter, substantially as described.
2. In a skiving machine, the use of a skiving cutter, a disc-like presser or clamp,
means to rotate it, a work-supporting and feeding wheel, a moveable yoke or frame
supporting said wheel, and devices to effect the adjustment of said wheel toward
and from and in a plane parallel with the plane of said cutter, for the purposes set
forth.
3. In a skiving machine, the use of a skiving cutter, a disc-like presser or clamp,
means to rotate it, a work-supporting and feeding wheel, a movable yoke or frame
supporting said wheel, devices to effect the adjustment of said wheel toward and
from said cutter, and a guide and spring to co-operate with the edge of the material
resting on said wheel and under said spring, said guide and spring following the
wheel in its adjustments, substantially as described.
4. In a skiving machine, the main shaft; the cutter shaft, connecting gearing
between them; a disc cutter; a work-supporting and feeding wheel; its shaft, a
pivoted yoke for said shaft, a gear on the shaft carrying the work-supporting and
feeding wheel, and a shaft, as B', and gears between it and the main shaft and.
between it and the shaft carrying the said work-supporting and feeding wheel, the
pivotal point of the yoke or frame in which the shaft carrying the work-supporting
or feeding wheel is mounted being substantially coincident with the longitudinal
centre of the said shaft B, to operate, substantially as described.
5. In a skiving machine, a cutter shaft, a disc cutter mounted thereon, a shaft B*,.
means to rotate it and the said cutter shaft, a gear on said shaft B, a yoke or
frame having its pivotal point substantially coincident with the centre of rotation of
said shaft B, a shaft as B' mounted in said yoke or frame and provided with a
gear, as E', and with a work-supporting or feeding wheel; devices to adjust said
yoke or frame about said pivot; and a stand, and a gauge thereon, said stand
being connected to and removable with said frame or yoke, to operate, substantially
as described.
6. In a skiving machine, the use of a work supporting and feeding wheel, a
rotating skiving cutter, bearings for the same, and a carrier for the said cutter and

page_text: its bearings, said carrier being adjustable longitudinally with relation to said
work-supporting and feeding wheel, substantially as described.
7. In a skiving machine, the use of a frame; a work-supporting and feeding
wheel; a carrier mounted in said frame and adjustable longitudinally with relation
to said work-supporting and feeding wheel; a block pivotted to said carrier ;
bearings thereon, a cutter, and its shaft journaled in said bearings, substantially as
described.
8. In a skiving machine, the use of a rotating work-supporting or feeding wheel,
its shaft, a rotating cutter to skive the material, its shaft, an actuating shaft
connected with and to rotate said cutter shaft, bearings for the said cutter and
actuating shafts to maintain the same always in fixed relative position, and means
to vary the relative position of the said cutter and work-supporting or feeding
wheel, whereby the said cutter is caused to stand in a position nearer to or farther
from said wheel without changing the plane of said cutter, substantially as
.described.
Dhe 09-1 1 of Amil 180A
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.