Improvements in Machine Sheep Shears.
Year: 1898

page_text: Date of Application, 28th Dec., 1898-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION
Improvements in Machine Sheep Shears.
I, ALFRED MELCHIOR, of Rowley Street, Camperdown, near Sydney, in the
Colony of New South Wales, 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:-
This invention relates to those machines which are generally known as
6. machine
sheep shears" though they may be used for shearing or clipping the covering of
other animals than sheep In such machine shears a cutter is recipiocated over a
comb by means of power communicated to it by means of a reciprocating or main
lever the forward part of which is further used to impart pressure to the cutter
above the comb These improvements have been devised in order to produce such
a machine sheas as will be more easily and cleanly operated and at the same time
cost less in maintenance
These unprovements in machine sheep shears consist in the particular com-
bination and arrangements of mechanical parts hereinafter set forth by which (1)
the tension or pressure of the cutter upon the comb is regulated (2) by which the
reciprocating or main lever is held firmly to its pivotal position, and at the same
time has within limits such freedom of movement as will allow it to adapt itself
to all the exigencies of the movements of the cutter on the comb (3) by which the
back end of the fork or main lever is supported and (4) by which a current of air
is forced through the casing of the machine and discharged over and in contact
with the cutter and comb.
But in order that this invention may be clearly understood, reference will
now be made to the drawings herewith in which Figure 1 is a sectional elevation
of a machine shears constructed according to these improvements Figure 2 is a
reverse plan of same Figures 3 4 and 5 are sectional transverse views looking
backwardly and taken on lines bb, co, a a respectively in Figure 1 Figure 6 is a
partial plan of the machine with cover reciprocating lever pressure fork and cutter
iemoved and Figure 7 is a plan of said lever and fork and the fulcrum bridge.
On to the forward bottom part of the casing A the comb B is attached by
means of screws B1 the cutter C reciprocating to and fro on the top face of said
comb The reciprocating or main lever D does not directly bear upon the said
cutter C but cairies under it a three-pronged subsidiary pressure plate or three-
pronged fork E having pintles El taking into orifices in the cutter C This
pressure fork
has a spherical recess E 2 for taking the spherical end of pintle D 1
of main lever D and it has at its tail where it is attached to said lever D) a spherical
recess E3 in which takes the spherical head D3 of its affixing screw D2 to
lever D The pivot upon which the lever D reciprocates is formed of a screw pin F
canied in a bidge formed of upper bar F1 and lower bar F2 joined together
by side pieces or cheeks F3 which fit between guides or abutments A1 forming
part of the casing of the machine The pin F is screwed into the upper bar F 1
has a jamb nut F4 and a set screw F5 and it is spherical ended, setting on a
line D3 in a lever I) Through the bottom of the casing A the tension screw G

page_text: passes backwardly into the female screw in the lower bar F2 The under face of
the head G 1 of the screw G has a ratchet G2 and on the under part of the casing A
18 & spring pawl G3 as shown to lock said head G 1 and screw G from turning
backwardly until said pawl is released tom the ratchet by being pressed inwardly
The back end of the leve: D is supported on its wearing strip D4 by rolleis H
working on liners on weaning stap H1 attached to the casing A These rolleis H
are carried on pins on bar H2 which is held radially to the pivot of the lever by
means of iod H3 whose eye H4 surounds a boss on the lower bai F2 being hept
in place by a washer or as shown by a pin H 5 Within the jaw D5 of the
lever D the 1oller J 1 of the crank pin J takes and which moving around with the
crank imparts the necessary reciprocation to said lever ) on its pivot F At the
back of the crank pin J and its balance pin J 2 is a disc or wheel having angular or
helicoidal vanes K which revolve with the spindle L in front of the orifices o
openings K 1 in the casing A The spindle or shaft L has a universal coupling to
a flexible shaft or other mechanism for evolving it as well understood
The
casing A has removable cover A 2 which 18 held in place by pintle A 3 and
spring A. 4.
'
The
""
In operation the comb A 18 ground perfectly flat on its upper face while the
cutter Cas also ground flat or hollow but preferably flat with a heel as described in
my application for patent of even date herewith The pressure piece is
attached by screw 1)2 to the lever D and thus lever I is placed within the pivot
bridge with the pin F adjusted as desired on the liner in its top face
budge is then slid down with its cheeks F3 in grooves or abuttments Al and
the screw G inserted in the lower bar F2 the radial rod H3 being previously
placed around the boss of the lower bai F2 causing the rollers H to support the
back end of the lever D as shown. Now to get the requisite pressure of
tension
between the cutter C and the comb A. the screw G is turned by means of head G 1
drawing the fulcrum budge downwardly and by means of tulerum on rollers II causing
pressure upon the piece F. The spherical bearings E2 and E3 which this pressure
piece has allows it to adapt itself to any varying strengths or elasticities of the
cutter and to distribute the pressure evenly on said cutter during all parts of the
movements. Further the lever D having its spherical bearing on the rounded
end of pin F and being fiee at both its ends has within the necessary
limits universal motion on its pivot so as to allow it readily to adapt its position at
all times and under all circumstances to the necessity of imparting oven pressure
to the pressure piece E and cutter C
The vanes K of the disc or wheel revolving in front of the orifice, 1 cause
a brisk and continuous curient of air to pass from the back of the machine under
the cover or within the casing and to escape over the comb and cutter during their
motion thus blowing away all dirt and detutus and at the same time tending to
keep cool the parts in contact
Having thus 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 18.
First In machine sheep shears the combination with a reciprocating lover
such as D and devices for thrusting its for ward end on to the cutter of a pressure
piece such as E having spherical contacts or connections to sarl Irver such as E2
and E3 substantially as herein described and explained and as illustrated in the
drawing
Second In machine sheep shears the combination with a reciprocating lever
such as D of a pivot pin such as F having spherical bearing thereon and a sliding
bridge over said lever adapted to be drawn towards the casing to give pressure
or tension to the cutter substantially as herein described and explained and as
illustrated in the drawings
Third In machine sheep shears the combination with a reciprocating lever
such as D pivoted on a pin such as F in a bridge sliding on the casing of tail

page_text: rollers such as H on end of radial rod such as H 3 taking around pivot bridge or the
like substantially as herein described and explained and as illustrated in the
drawings.
Fourth In machine sheep shears the combination and arrangement with the
working parts contained in a casing open above the cutter and comb of vanes such
as K on a wheel or disc (on the driving spindle) in front of orifices in the back of
said casing substantially as herein described and explained and as illustrated in the
drawings.
Fifth The particular combination and arrangement of parts altogether forming
a machine sheep shear substantially as described and explained and illustrated in
the drawings.
Dated this Nineteenth day of November One thousand sight hundred and
ninety-eight.
Witness,
Fred Walsh
A MELCHIOR
Patent Agent, Sydney, N.S.W
Bottomley & Liddle,
154, St Vincent Street, Glasgow, Applicant's Patent Agents