Improvements in Leather Shaving Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Leather Shaving Machines.
I, SAM HALEY, of the Firm of Thomas Haley and Co., of Bramley, near Leeds,
in the County of York, Machine Makers, do hereby declare the nature of this
invention to be as follows;-
-
This invention relates to certain improvements which have reference to what
is commonly called "Roots"" leather shaving machine."
In this machine a revolving spiral, cutter is employed for shaving the leather,
and it is necessary to have the revolving cutter sharp, and this is effected by one
or more revolving emery discs which can be moved into contact with the cutters
for grinding same, by means of a hand-wheel turned by the attendant which
operates a worm and worm-wheel. The pedestals carrying the emery rollers and
the pedestals which carry the worm and worm wheel are connected together by
screwed rods at each side of the machine so that when the revolving spiral cutter
requires grinding or sharpening the pedestals are made to slide on a bed formed
on the framework of the machine, the sliding of the emery rollers backward and
forward being effected by the attendant turning the said hand wheel, and thus
setting in motion the worm and worm wheel for moving the pedestals. When
the cutter has been sufficiently sharpened the attendant reverses the rotary motion
of the hand wheel and removes the emery rollers from the cutter, but this opera-
tion takes several revolutions of the hand wheel to withdraw the emery rollers
from the cutter, and when the said cutter requires sharpening again, the attendant
rotates the hand wheel causing the pedestal and emery rollers to advance towards
the cutter but this operation cannot be relied upon.
The object of this part of my invention is to remove the emery rollers instan-
taneously from contact with the revolving cutter, and also to bring the emery
wheels instantaneously back again into contact with the cutter bringing the said
emery rollers to the exact position they occupied before they were withdrawn.
In order to carry this part of my invention into practice, I mount a shaft
cross-wise of the machine having at each end a cam or eccentric. Upon this
cross shaft is an upright lever on the upper end of which is a horizontal rod
provided with a handle at its opposite end; therefore when the emery rollers
have to be removed from the revolving cutter the attendant pushes back the
horizontal rod and oscillating the said shaft thereby removing the said cams
from contact with the pedestals. A flat, or other form of spring, when the cams
are removed, forces the pedestals backward thus removing the emery rollers away
from the cutter; but when the said emery rollers are again required to grind
the cutter, the attendant pulls the horizontal rod forward causing the cross shaft
to rock, placing the cams back again into contact with the pedestals to the exact
position the emery rollers occupied before the said emery rollers were moved
away. When however the cutter requires grinding the emery rollers can be
slightly advanced against the cutter by the attendant giving a partial turn of
the hand wheel.

page_text: The flat spring which forces the pedestal backward from the revolving cutter
is kept at a suitable tension by means of a plate against which is a screwed stud
or bolt passing through a lug fast to the top framework of the machine.
By this means the emery rollers can be instantly moved against and from
the cutter by movement of the rocking shaft and cams or tappets or equivalent
devices.
The second part of my invention in this class of machine relates to the shaft
upon which the emery rollers revolve. In practice it is found that as the emery
rollers revolve upon this shaft that it soon wears, necessitating a new shaft which
is costly. To avoid the necessity of making a new shaft I fix a cast iron sleeve
upon the shaft such sleeve being driven tight thereon when hot or otherwise
so that it remains stationary upon the said shaft. I then mount upon the fixed
sleeve a loose cast iron collar or boss onnected to the emery rollers. The said
loose cast iron boss revolves upon the cast iron sleeve upon the shaft. Both the
fixed sleeve or bush and the loose collar being made of cast iron the loose collar
revolves smoothly and when the cast iron sleeve becomes worn it can be removed
and a new one fixed upon the said shaft thus dispensing with the necessity of
making a new shaft, consequently reducing the cost thereof.
TASKER & CROSSLEY,
Patent Agents, Halifax.
Improvements in Leather Shaving Machines.
I, SAM HALEY, of the Firm of Thomas Haley and Co., of Bramley, near Leeds,
in the County of York, Machine Makers, 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 certain improvements, which have reference to
leather shaving, whitening and buffing machines.
In order that my invention may be better understood, I will make reference to
the accompanying sheets of drawings, wherein Fig. 1 is side elevation of a por-
tion of a leather shaving machine, Fig. 2 is plan view of same, Figs. 3 and 4
are modifications.
In this class of machine a revolving spiral cutter A is employed for shaving
the leather, which cutter it is necessary to keep very sharp for doing good work.
The sharpening of this revolving cutter is effected by one or more revolving
emery wheels or discs B which can be moved into or out of contact with the
said cutters for grinding same, by means of a hand wheel C (Fig. 2) mounted
upon cross shaft D turned by the attendant. The turning of this hand wheel C
operates two worms E fixed upon the cross shaft D. These worms E gear with
worm wheel G mounted on short screwed shafts H, which not only carry the
worm wheels, but serve to connect together the two pedestals I and J, so that
when the revolving spiral cutter A requires grinding or sharpening, the
pedestals J are made to slide on a bed L formed on the framework M of the
machine; the sliding of the said emery wheels backward and forward to and
from the cutter, being effected by the workman turning the hand wheel C and
thus setting in motion the two worms E and worm wheels G for moving the
pedestals J, and the emery wheels B bodily towards the revolving cutter for
the purpose of sharpening same. When the cutter A has been sufficiently
sharpened, the attendant (before our improvements came into operation) used to

page_text: reverse the rotary motion of the hand wheel C and thus remove the emery wheels
from contact with the cutter, but this operation of carrying the emery wheels
to and from the cutters takes several revolutions of the hand wheel C to perform,
consequently the method of operating the said emery wheels was slow and
ungainly and unreliable.
The object of this part of my invention is to put the emery wheels into instant
contact with the revolving cutter and also to remove the emery wheels away
from contact with the revolving cutter which can be done according to my inven-
tion by simply pulling or pushing the handle or knob R, Fig. 1.
In order to carry out this part of my invention, I mount an additional shaft N
crosswise of the machine having at each end of the said shaft a small cam or
eccentric 0. Upon this cross shaft N is fixed a lever arm P connected by rod Q
to the handle or knob R. The drawing Fig. 1 shews the emery wheels B in
contact with the cutting knife A; but by pushing the rod Q forward in the
direction of arrow S the short lever P is moved forward, as shewn in dotted
line in Fig. 1, thus moving the eccentrics or cams O, whereby the emery wheels
are moved away from the revolving cutter and the sharpening thereof is thereby
stopped. When the cams 0 are moved from pedestal I a flat spring a which has
been forced against the ends of screw b is released, consequently the flat spring a
pushes the pedestal I and through the medium of the screw rod H, the other
pedestals Jare all made to slide on their bed L; thus the emery wheels are
removed. When, however, the knife requires to be re-sharpened the operator
pulls the rod Q backwards into the position shewn in full line of Figs. 1 and 2,
whereby the emery wheels are again placed into contact with the revolving
cutter to sharpen same. Thus the said emery wheels are put back against the
cutter A by mechanical means to the exact position they occupied before their
removal, and the movement to and from said cutter being made positive and
instantaneous.
A modification for instantly putting the emery wheels in and out of contact
with the cutter is shewn in plan Fig. 3 front elevation Fig. 4, also at plan
Fig. 5, and front elevation Fig. 6.
In the case of Fig. 3, the sleeve e on sliding shaft T is placed slightly eccentric
and by turning handle T a portion of a revolution, the shaft T is driven around,
and the sleeve c, which is eccentrically fastened to the said shaft causes the
emery wheels to slightly move backwards or forwards, to put the emery wheels
into instant contact with, or draw away from, the revolving cutter A. Figs. 4, 5,
and 6 comprise almost the same parts as those just described except that instead
of the sleeve c being eccentric with the shaft T, the said shaft is placed in
eccentric metal bearings U shewn better in Figs. 5 and 6. It will be under-
stood that the amount of eccentricity of both the sleeve c and bearings U is
very slight, just sufficient so as to remove the emery wheels from contact with
the cutter.
The second part of my invention in this class of machine relates to the shaft T
upon which the emery wheels B revolve. In practice it is found that as the
emery wheels revolve upon the said shaft T that the latter soons wears away
necessitating a new shaft. To avoid getting a new shaft T I fix thereon a metal
sleeve c, such sleeve being driven tight thereon when hot, or by other means, so
that it remains stationary upon the non rotating, but sliding shaft T (see detail
Fig. 7).
loose metal boss d which
There is then a collar f
I then mount upon the fixed sleeve c, a long but
carries the emery wheels B with suitable packing e.
placed upon the said long boss and a driving pulley W is screwed upon the
boss d to securely grip the emery wheels. The boss & with the emery wheels B
runs loosely on sleeve c. When the metal sleeve becomes worn it can easily
be removed and a new sleeve fixed upon the shaft T, thus dispensing with the
necessity of making a new shaft and consequently reducing the cost of renewal.
In order that the revolving discs B may move or traverse endwise the full

page_text: length of the cutting knife A the shaft T is provided with a boss X fastened
upon the shaft T by set screw h. This boss X has a recess Y formed on two
opposite sides which receive the prongs of a clutch Z. These prongs Z are
secured to or form part of an upright mounted upon a sliding shaft 7. This
upright is attached by nuts to the upper end of lever Z³ fulcrummed at 7+,
the lower end of such lever being connected to the revolving face plate driven
by worm gearing from the driving shaft ; thus whilst the grinding wheels
are made to revolve, the shaft T remains stationary and the whole of the said
parts are slided along with the shaft T by means of the face plate and levers
just described.
A bed or keyway m, see Fig. 4 is cut in the shaft T so that
the sleeve and shaft move endwise as the driving pulley W and emery wheels
are made to rotate.
With regard to the rotary motion imparted to grinding wheels B by means
of a belt from cylinder 1 to pulley 4 as hitherto and also with regard to the
traverse motion 72,73, and % driven by means of a belt from pulley 9 on to
pulley 7 as hitherto, viz.-by two separate drives. Instead of cylinder 1, I
substitute cylinder 2 on shaft 6, see Fig. 8 which by means of strap 3 imparts
rotary motion to pulley 4 on the shaft of the emery wheels B.
I mount a fast and loose pulley or clutch 5 on shaft 6, this fast and loose
pulley or clutch receives its rotary motion from pulley 10 by strap 11.
By means of a beſt from pulley 12, motion is given to pulley 7 which drives
the worm wheel 8, thus giving motion to the crank plate Z, traverse lever 73
and sliding shaft 7. From this it will be seen that the rotary motion of grind-
ing wheels B and also traverse motion of grinding wheels B are both got from
one source, viz.-pulley 10, strap 11 and fast and loose pulley or clutch 5. Thus
the rotary motion and traverse of grinders can be stopped or started simultane-
ously by loose pulley or clutch 5.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to performed, I declare that what
I claim is
1. In leather shaving, whitening and buffing, machines, the combination of
cams (), lever arm P and rod Q for instantly moving the grinding wheels B
either into contact with the revolving cutter or away from it, in the manner and
for purposes herein shewn and described.
2. In leather shaving, whitening, and buffing machines for moving the emery
wheels into contact and out of contact with the cutter, the use of the eccentric
sleeve e shewn in Fig. 3 and the eccentric metal bush U, shewn in Fig. 5 and
operated by handles T" all in the manner and for purposes described.
3. In leather shaving, whitening and buffing machines, the employment of the
concentric sleeve e fastened upon the shaft T where the cellar drevolves thereon
driven by strap passing over the screw pulley W, all arranged as shewn in Fig. 7
and operated in the manner herein set forth, and for purposes described.
4. In machines for shaving, whitening and buffing leather, the use of cams 0,
lever arm P and rod Q in combination with the cylinder 2, strap 3, pulley 4
for obtaining rotary and traverse motions by one drive or belt and for stopping
and starting the emery wheels simultaneously.
Dated this 31st dov of Inconot 1900
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for the Applicant.