Year: 1886

page_text: Date of Application, 16th Apr., 1886.
Complete Left, 15th Jan., 1887.
Complete Accepted, 15th Feb., 1887.
I, JAMES SILMAN, of Victoria Buildings, Kingswood Hill, in the county of
Gloucester, engineer, do hereby declare the nature of this invention to be as follows :-
The improved machine for cutting leather which constitutes this invention is
designed to cut the material in a true, even and clean manner. It is constructed as
follows. Suspended from a bar secured to the frame and extending over the cutting
table is a carriage to which is clamped a bracket carrying a circular knife capable of
rotating in its bearings. By means of a pinion carried in bearings in the knife
carriage and gearing with a rack extending across the table. the knife carriage is
capable of being traversed from one side of the machine to the other. The pinion may
be driven by a hand lever or by a pulley and belt. The knife travels in a slot formed
in the table of the machine. Instead of a rack and pinion, other means may be adopted
for imparting motion to the knife carriage.
Extending across the table is a holding down bar, preferably of angular shape,
which is, by the operation of levers and cranks, inade to bear upon and hold the leather
firmly in place for cutting. Cutting is effected as the knife travels from one side of
the machine to the other. By the use of the simple machine above described, an even
and clean cut is effected. An adjustable gauge placed at the delivery end of the
machine regulates the widths to which it is desired to cut the material.
W. LLOYD WISE,.
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, JAMES SILMAN, of Victoria Buildings, Kingswood Hill, in the county of Glou-
cester, engineer, 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 :-
The improved machine for cutting leather which constitutes this invention is
designed to cut the material in a true, even and clean manner. It is constructed as
follows:-
Suspended from a bar secured to the frame and extending over the cutting table is a
carriage to which is clamped a bracket carrying a circular knife capable of rotating
in its bearings. By means of a pinion carried in bearings in the knife carriage, and
gearing with a rack extending across the table, the knife carriage is capable of being
traversed from one side of the machine to the other. The pinion may be driven by a
hand-lever or by a pulley and belt. The knife travels in a slot formed in the table of
the machine.
Instead of a rack and pinion, other means may be adopted for imparting motion to
the knife carriage.
Extending across the table is a holding down bar, preferably of angular shape,
which is, by the operation of levers and cranks, made to bear upon and hold the leather
firmly in place for cutting.
Cutting is effected as the knife travels from one side of the machine to the other.
By the use of the simple machine above described, an even and clean ent is effected.
An adjustable gauge placed at the delivery end of the machine regulates the widths
to which it is desired to cut the material.
Referring to the accompanying sheet of illustrative drawings, Fig. 1 thereon re-
presents a front elevation of a machine for cutting sheets of leather, constructed and
arranged in accordance with this invention. Fig. 2 is a transverse vertical section of
the machine, and Fig. 3 is a part plan.
The knife a', which is circular, is carried in a bearing in a bracket a² clamped by a
screw or screws to the carriage a which is suspended from the bar b extending over the
table c and secured to the frame by bolts and nuts, as shown.
In the knife carriage are the rollers & bearing upon the upper face of the bar b.
Extending from one end of the frame to the other, and passing through the knife
carriage, is a rack e against the under face of which bear the rollers d' carried in
bearings towards the lower part of the knife carriage. A pinion contained within
the knife carriage gears with the rack e.
When, by turning the hand-lever g, the pinion is rotated, the carriage travels
accordingly along the rack, the rollers d d revolving on their axes as the carriage
travels. By friction between the knife and the leather or other material in process
of being cut, and which is fed to the machine from behind the knife, the knife is
caused to rotate and, as it travels along the groove formed for it in the table, it severs

page_text: ::
the material which is adjusted therefor over the edge of the plate c¹ when the knife is
towards either end of its travel. To hold the leather firmly and to keep it from
"buckling or bending while in process of being cut, the angular bar h is
employed. At each end the bar is connected by the rods i to the cranks k
fitted to the shaft 1. The rods are preferably screwed into the pins of the
cranks so as to admit off adjustment of the range of vertical travel of the
bar h The bar is lowered and raised through the medium of the counter-
weighted pedal m on which is a pin which, as the bar is lowered, bears
against the face of the flat spring, and when the bar has been brought down to bear
upon and clamp the leather to be cut, the pen n takes into the notch of of the spring o
and thus the leather is held clamped until, by forcing the counterweight pedal m still
further down and simultaneously thrusting back the spring o, the pin is released and
the bar raised. By making the bar angular, as shown, a firm and even clamping
effect is obtained. In the front of the table c are sunk the graduated gauges q
fitted
with movable gauge pins q¹ whereby the lengths to which the leather is cut are
regulated.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. In a machine for cutting leather and other like or analogous material, the use of a
circular knife such as a¹ for cutting such material and attached to or supported in a
carriage or frame such as a capable of being driven by means of a rack such as e and
pinion or their equivalent from end to end of the machine over the material to be
cut, substantially as bereinbefore described with reference to the appended sheet
of drawings.
2. In a machine for cutting leather and like material the employment for holding
down the said material for the purpose of obviating "buckling" or rising thereof under
the knife when being cut, of a bar such as of angular shape made to hear, when
required, on the material through a counterweighted pedal or lever such as m, cranks k,
crank-shaft and rods, held down by a pin or stud formed on or fixed to the pedal or
lever and taking into the notch of a spring such as o, or by equivalent means, the
said holding down bar being arranged to rise from and release the leather through
the counterweight of the pedal or lever, or by the equivalent thereof, operated by
foot or other pressure, substantially as hereinbefore described.
3. In a machine for cutting leather and like material the combination of a circular
knife such as a' for cutting such material carried in a frame or carriage such as a
suspended above the material and free to be moved over it, a bar such as h for holding
down the material to he cut, a table such as furnished at the front with gauges such
as and means for operating the said knife carriage and the holding down bar, sub-
stantially as hereinhefore described.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.