Year: 1886

page_text: Date of Application, 28th Aug., 1883.
Complete Left, 26th May, 1887.
Complete Accepted, 16th Aug., 1887
I, CARL WAGNER Junior, of Offenbach % in the Empire of Germany, do hereby
declare the nature of this invention to be as follows:-
This invention relates to machines for skiving or sharpening leather, and comprises
the improvements hereinafter set forth.
The improved machine is designed for the use of saddlers trunk-makers, shoe-
makers, book-binders, portfolio-makers, and other manufacturers, and has for its object
to effect the sharpening of the leather at the edges thereof or the thinning thereof over
its entire surface.
The said machine is provided with driving pulleys which are connected with a
troadle or with any suitable motor. Rotary motion is transmitted from the said
pulleys by means of a connecting rod and crank to a shaft carried in suitable bearings.
This shaft is connected by cranks or arms with a sliding bar in which a knife is fixed
with a capability of adjustment. This knife has vertical reciprocating motion imparted
thereto by the means above described.
By means of the aforesaid shaft, which makes only a quarter of a revolution drawing
rods connected therewith are moved up and down through the medium of a crank
fixed on the said shaft. This motion is transmitted by other cranks and drawing rods
to two levers. These levers, in combination with two springs set a transporter or
feed bar in motion, so that, in each up and down movement of the knife, it rises from
the leather, passes back laterally, moves down upon the leather, and pushes the latter
forward. The horizontal to-and-fro motions are offected by means of a slide-rest guide
and the vertical movements by means of a pin guide.
When the transporter or feed-bar descends, in order to obviate the stoppage of the
same in its downward movement there is provided a semi-circular notch on the lower
lever into which the said pin falls in the downward motion.
An adjustable segmental support is provided, the motion of which is threefold. The
adjustment of the said support towards the knife is effected by a handwheel, an
endless worm and a toothed segment gearing therewith. The horizontal adjustment

page_text: of the said support towards, or away from, the knife is effected by the slide rest
motion by means of another hand-wheel. For any adjustment for the purpose of
exchanging the knife or the like a circular motion is also given to the said support.
By the adjustment of the support by means of the first named hand-wheel, the
leather can be sharpened more or less obliquely whilst the adjustment of the support
by means of the last named hand-wheel determines the thickness of the leather in
thinning the same over its entire surface.
Dated this 28th day of August 1886
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.
Improvements in Machines for Skiving or Sharpening Leather.
I, CARL WAGNER, junior, of Offenbach %m, in the Empire of Germany, 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 machines for skiving or sharpening leather, and comprises
the improvements hereinafter set forth.
The improved machine is designed for the use of saddlers, trunk-makers, shoe-makers,
book-binders, portfolio-makers and manufacturers of other leather goods.
The said invention has for its object to effect the sharpening of the leather at the
edges thereof or the thinning thereof over its entire surface.
In the accompanying drawing:-
and
Figure 1 is a front elevation of a machine constructed according to my invention,
Figure 2 is a side elevation of the same partly in section.
a is the main frame of the machine, and b is a knife which is attached to a plate c
adapted to slide in guides d in the frame a.
Motion is imparted to the knife 6 from the cone pulley e, which is connected by a
belt with a pulley operated by a treadle, or with any suitable motor. The rotary
motion of the pulley e imparts an oscillating motion to the shaft h by means of the
connecting rod and the crank g, the said shaft is carried in suitable bearings i. This
shaft is connected at its other end by a crank ; which has a pin working in the
slotted arm the said arın is connected with the plate c in which a knife bis
adjustably secured in such a manner that the latter makes up and down motions in
the vertical direction.

page_text: 1 is the transporter or feed which is operated from the shaft h (which is so arranged
เ
that it makes only about a quarter of a revolution to each revolution of the pulley e)
through the medium of the crank o, the connecting rods and
P 9, pivoted thereto and
connected to the lever arms r and which are pivoted upon the shafts, the
opposite lever arms t, u connected to the drawing rods t¹, u¹ which have their lower
ends connected to the two levers ², and u². These levers t, u, in combination with
the two springs v, v operate the transporter or feed-bar in such a manner, that
during each up and down movement of the knife, the said bar 7 rises from the leather,
passes back laterally, moves down upon the leather, and pushes the latter forward.
Horizontal motion is imparted to the feed bar by means of the arm u² of the bell-
crank lever u² this arm engages with a pin to³ on the slide rest w and moves the said rest
(to which the bar is attached) in a horizontal direction. The spring of acting upon
the rod which is attached to the slide rest brings the said rest into its norimal
position.
Vertical motion is imparted to the feed bar by the end of the lever t, the said
end engages with a pin on the feed bar Z and lifts the said bar vertically.
The spring acting upon the rod v tends to keep the feed bar in its lowermost
position.
The feed bar is moved in its horizontal to-and-fro direction by means of the slide-
rest w working in guides attached to the frame a and is guided in its vertical
movements by means of pins wo' screwed into the slide rest w and passing through
slots win the said feed bar.
The motions of the feed bar Z will be better understood by reference to the diagram
Figure 3.
The first motion is upward in the direction of the arrow I and is caused by the
lever t³.
The second motion is a free back motion in the direction of the arrow II and is
caused by the spring v.
The third motion, in the direction of the arrow III, brings the feed foot onto the
leather and is caused by the spring v, and the fourth motion in the direction of the
arrow IV, and by which the leather is caused to advance, is effected by the bell-crank
lever u³.
As regards the third motion, that is when the transporter or feed-bar / descends, it
is to be noticed that, in order to obviate the stoppage of the same by the impingement
of the pin against the lever ta notch a is provided in the said lever into which
notch the said pin enters in the downward motion.
y is an adjustable segmental support, the motion of which is threefold i.e. 1st. The
adjustment of the said support towards the knife is effected by the hand wheel y', a
worm and a toothed segment y gearing therewith. 2nd. The horizontal adjust-
ment of the said support towards or away from the knife is effected by the slide rest
motion by means of the hand wheel 2. 3rd. For any adjustment for the purpose of
exchanging the knife, or the like, a circular motion is also given to the said support
upon the pin z².
The leather to be sharpened on its edges or thinned all over its surface is held
against the segmental support y, and the knife 6 in descending cuts the leather
according to the position which the support y holds in relation to the knife.
By the adjustment of the support by means of the hand wheel y', the leather can
be sharpened more or less obliquely, whilst the adjustment of the support by means
of hand wheel z determines the thickness of the leather in thinning the same over its
entire surface.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is :—
First. The improved machine consisting of the parts constructed and combined
substantially as hereinbefore described and operating as, and for the purpose,
set forth.

page_text: Second. The mechanism for effecting the vertical motions of the knife, and com-
prising the pulley e, the rod f connected with the said pulley by means of a crank pin,
the crank g, the shaft h and the crank j and slotted arm k, in combination with the
plate c carrying the knife b which is adjustably connected with the said plate.
Third. The mechanism causing the motion of the transporter or feed bar in the
vertical and in the horizontal direction, and comprising the crank o on the shaft h,
the rods p, q, the crank arms and s, the crank arm t, u, the rods t, u, the
levers t, u, and the springs v, vl, the said transporter or feed bar operating in such a
manner that in the single up-and-down motion of the knife bit rises from the leather
placed upon the support, passes back laterally, noves down again onto the leather
and after this causes the leather to advance by a lateral motion opposed to the second
motion.
Fourth. The segmental support y, which is rendered adjustable relatively to the
knife, substantially as, and for the purposes, set forth.
Dainel
1
1007
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.