IMPROVEMENTS IN LEATHER 33 PARING MACHINES
Year: 1882

page_text: LETTERS PATENT to Edward Griffith Brewer of 33 Chancery Lane in the
County of Middlesex for an Invention of "IMPROVEMENTS IN LEATHER
33
PARING MACHINES Communicated to him from abroad by Hermann Mayer
of Paris France
PROVISIONAL SPECIFICATION left by the said Edward Griffith Brewer
at the Office of the Commissioners of Patents on the 21st September 1882.
EDWARD GRIFFITH BREWER of 33 Chancery Lane in the County of Middlesex
"IMPROVEMENTS IN LEATHER PARING MACHINES (A Communication to me from
abroad by Hermann Mayer of Paris France)
"
This invention has for its object to provide a machine for reducing leather by a
paring operation so as to diminish its thickness over any part or the whole of its
surface.
The improvements consist in the construction and combination of parts as
hereinafter described comprising a paring cylinder having a roughened surface, a
bearing bar for holding the leather to be pared against the paring cylinder, a
sliding carrier for feeding the leather to the paring cylinder, a binding device for
holding the leather on the carrier, a lever for moving said carrier, and means for
adjusting the movement of the various parts.
The main frame of the machine consists of two side pieces connected by rods or
cross pieces. There is a cylinder mounted in bearings in the frame sides covered
with sand paper so as to produce a roughened surface. To fasten the ends of the
sand paper the cylinder may be formed in two sections one hinged to the other,
the paper passing down between the free edges of both. To fasten the cylinder
sections together a threaded hook secured in lugs on segment and engaging with a
stud on the other section may be employed.
There is a bearing bar having journals at either end which have bearings in
arms pivotted at their lower ends to side pieces the said bearing bar stands radially
with respect to the cylinder and is so held when in operation, by spring on the
journal. Said bar may be rocked against the influence of said spring by means of

page_text: a handle on a journal so as to move its lower edge up or away from the surface of
the cylinder to permit the introduction of the stock to be operated upon between
said bar and cylinder. The arms are drawn towards the cylinder by springs
fastened to said arm and to adjusting screws in uprights which arise from the side
pieces. To limit the movement of said arms and of the bearing bar towards the
cylinder adjusting screws which meet the edges of said arms, are located in an
upright. By means of these the bearing bar may be accurately adjusted at both
ends and thus kept truly parallel with the axis of the cylinder. A carrier moves
to and from the cylinder in grooved supports projecting from the side pieces. To
move said carrier there is provided a horizontal lever which is fulcrummed on the
under side of one of the supports. Said lever is connected by a link with a central
pin on the under side of the carrier. Its opposite extremity terminates in a handle
and projects laterally to one side of the machine, so as to be within easy reach of
an operator standing in front of the machine yet out of location to interfere with
or strike such operator. There is a binding device for holding the leather on the
carrier;
it consists of a plate or bar having a central straight upright which passes
through a fixed plate and carries an eccentric lever which bears against said fixed
plate. Said fixed plate is sustained upon the shoulders of screws which rise from
the carrier and pass through its plate. Said screws are encircled by springs which
bear down on the plate. To raise said plate the lever is elevated. When elevated
the leather to be pared is passed in under it towards the cylinder. The lever is
then turned down and the springs acting on plate cause the latter to bind the
leather and hold it while being pared. There is a gauge for adjusting the extent
of insertion of short pieces of leather under the binder and adjusting screws for
limiting the movement of the carrier towards the cylinder, said screws meeting
and being stopped by supports in which said carrier slides. The leather to be
pared is passed under the binding plate from the front side of the machine thus
avoiding danger incident to insertion from the side adjacent to the cylinder.
The operation is as follows: The carrier being drawn back from the cylinder the
leather to be pared is passed under the binder and so much of it as is to be reduced
or diminished in thickness is then brought between the bearing bar and the
cylinder, the carrier being moved up toward the cylinder by drawing the lever
outwardly by means of the handle. The cylinder pares the leather on the side
adjacent to it any required extent determined by the adjustment of the screws.
After the paring has been done the bearing bar is moved outwardly, the carrier
is drawn towards the operator by moving the lever handle inwardly and the
plate raised by manipulating the eccentric lever.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward Griffith. Brewer in the Great Seal Patent Office on the
21st March 1883..
"
EDWARD GRIFFITH BREWER of 33 Chancery Lane in the County of Middlesex
"IMPROVEMENTS IN LEATHER PARING MACHINES (A Communication to me from
abroad by Hermann Mayer of Paris, France)
.
The object of this invention is to provide a machine for reducing leather by the
operation of paring so as to diminish its thickness over any part or over the whole
of its surface.
In order to fully describe and illustrate the manner in which the invention is
carried into effect I will proceed to describe the same with reference to the accom-
panying drawings, Figure 1 is a side elevation of a machine constructed according
to this Invention and Figure 2 is an end view of same partly in section, a is the
table shown by dotted lines in Figure 2, it is fixed to two arms b b turning about
the shaft c these arms support at their upper part the pincers d intended to hold
the skin against the table; these pincers are carried by a shaft d' which is mounted
on the arms bb.the two bearings of which d" d¹¹ are eccentric with the shaft on
which a lever e is keyed; by turning this lever e to a particular angle the pincer
is raised or lowered and if the lever is further turned the slot c¹ in the lever will
be caused to press on the slot of the collar of the pincers and will thereby cause
the latter to turn about the shaft d, the skin to be pared can then be inserted.
Springs g allow the shaft d to rise somewhat to accomodate itself to the thickness
of the skin to be pared, one of the bearings d² is prolonged by an eccentric portion
receiving the head of a rod or connecting piece h. As shown in the drawing
the eye h' of the head of the connecting rod in which the prolongation d³ of the
shaft turns is lengthened. This connecting rod forms part of an automatic move-
ment intended to regulate the extent of stretch and the nature of the paring and
which forms an essential part in the invention. This automatic movement consists
of or is obtained by the following arrangement of mechanism viz: a connecting
rod h jointed at its lower part to a cam i which works on a pin i¹ on the lower
part of arm b; this connecting rod passes through two sockets k k sliding in
one another and containing a helical spring the rod h also passes through a
fixed socket or guide fixed to the arm b and the connecting rod h also carries a
collar m. The helical spring kill contained in the sockets k k¹ is intended to press
the cam i into a groove in the wheel n which is toothed only on a partion of its
circumference. This wheel n gears with a pinion n' on the axis of which the
wheel o is keyed this wheel o being in gear with the rack p and this latter passes
into a guide or bracket piece q² fixed to the frame and being composed of a fixed
and movable portion sliding in the fixed part. This latter contains a roller
guiding the rack. The movable part of the guide q which carries the roller q¹
abuts or presses against an adjusting screw, screwed into the lever r which lever is
keyed on the shaft 8. The shaft s also carries at each end an eccentric s¹; a con-
necting rod s shown in section at Figure 2 and in dotted lines at Figure.1 which is
fitted and works on the eccentric 8' at one end and is jointed at 8 to a bearing
or guide t at the other which either supports a roller t¹ or a gauge t". An arm u
extending from this guide t is jointed to the frame at u¹
for
The drum v coated with emery paper has quick rotary motion imparted to it...
In order to be able to produce paring to the extent and thickness required the
following arrangement is adopted. In the example given in the drawing it is to be
supposed that a paring analogous in shape to that shown at Figure 3 is to be produced.

page_text: For this purpose the rack has a vertical slot in which a guide or die w is fixed the
shape of which depends on the shape to be given to the paring. In the rack's slot
slides a graduated scale x which can be kept at any desired height by means of an
eccentric lever as shown in the drawing or by any other suitable means; a piece all
bevelled off at its upper part 1 is attached near the end of the scale the
piece being guided by a roller y at its lower end serving at the same time to
guide the rack p. By forcing the scale x more or less in the groove of the rack p
so the thickness of the paring would be regulated. In Figure 1 the roller y¹ is
supposed to be in the medium position. Figure 4 shows the position of the rack
and roller when the machine is not at work.
It will be seen that in this position the lever r is pushed to the rear by the
motion of the slide q¹¹ consequently the eccentric 8¹ will raise the scale or the
roller by which the skin is pressed onto the paring drum and the skin to be
pared will not touch the drum. The drum v. being put in motion to make the
paring, the collar d of the pincers is seized by the Attendant by means of the
opening d; and the table is brought forward.
The arm 6 turning about the shaft c will draw with it the cam i which being
pressed by the spring in the groove of the wheel n will cause this wheel to
revolve in the direction of the arrow. This motion of the wheel n will be
transmitted by the pinion n¹ and the wheel o to the rack p which will ascend
consequently the roller q' will descend in the slide w, xl then reascends to occupy
the position indicated by the dotted lines, Figure 4. While the roller passes into
the slide wx the lever approaches then goes away from the guide consequently
the roller or the scale t" will be more or less brought on to the skin and the
chamfering or paring will be accomplished.
Supposing now that it is not desired to have an automatic motion, in this case
the lever e is turned so as to cause the rod h to rise and a dog or stop piece will be
then interlaced between the fixed socket Z and the collar m as shown at Figure 5
which will keep the connecting rod h in this position. The driving can i will then
no longer be in contact with the wheel n and the automatic motion will be
interrupted the roller t¹ or the scale t¹¹ can. then be operated either by hand by
drawing on the lever r or by means of the treadle z which transmits its motion to
the shafts by means of a chain or counter weight.
To pare a complete skin to a desired thickness the rack is kept at a regulated
height corresponding with the space.to be left between the roller t¹ and the drum v
retaining the wheel o in a certain position by means of the catch 1. The same result
may be obtained by regulating the adjusting screw 2. In either case it will be
necessary to have thrown the automatic action out of gear.
To pare a complete skin the roller t¹ is preferably employed and for a clipping
the scale t".
To fix the emery paper on the drum the arrangement shown at Figures 2 and 6
is employed. Figure 6 shows in full lines the cylinder open and the position of the
closing mechanism in this case the same mechanism is represented in dotted lines
in the position which it occupies when the drum is closed.
Figure 2 shows the mechanism in section. The cone 4 of the cylinder. 3 is
pushed into the conical cylinder 5 and by screwing the bolt 6 shown in dotted lines
Figure 2 a perfect closing of the drum is obtained.
The paper is held on the drum by means of the eccentric lever 7 Figure 6 The
thread on the bolt.6 is left handed so that the bolt does not loosen during the.
movement. To change the paper it is only necessary to unscrew the bolt towards
the right and to open it. .
Having now.described the nature of the said Invention and in what manner the
same is to be performed I declare that I claim.
First
The combination with a set scale or roller with a drum coated with
emery or emery paper with the view of paring skins either wholly or partially and
substantially as set forth

page_text: Second-The application of an oscillating table whereby skins of any length
can be pared all substantially as set forth
Third: The particular arrangement of the automatic movement worked by
the oscillating table substantially as before described and illustrated in the
accompanying drawings.
Fourth-The combination of the graduated scale of the rack and of its fittings
so as to be able to regulate the form and dimensions of the paring all substantially
as set forth.
Fifth The particular construction of the drum and its tightening up mechanism
and closing all substantially as set forth.
Sixth The application of treadle and levers so that the machine can be
operated by the foot or hand, without having resource to the automatic movement
substantially as hereinbefore described and illustrated in the accompanying
drawings.
Seventh The particular arrangement of the pincers whereby skins of all
thicknesses can be tightened against the table all substantially as set forth.
Eighth The combination of the different parts with the view of chamfering
and paring skins of all kinds and descriptions all substantially as herein before
described and illustrated with reference to the accompanying drawings..
0
In witness whereof I the said Edward Griffith Brewer have hereunto set my
hand and seal this Twentyfirst day of March in the year of our Lord
one thousand eight hundred and eighty three.
T A DDED