Improved Method of Sharpening or Setting the Cutters of Sheep Shearing Machines, and Improvement in Apparatus therefor.
Year: 1898

page_text: Date of Application, 28th Dec., 1898-Accepted, 4th Feb., 1899
COMPLETE SPECIFICATION
Improved Method of Sharpening or Setting the Cutters of Sheep
Shearing Machines, and Improvement in Apparatus therefor.
I, ALFRED MELCHIOR, of Rowley Street, Camperdown, near Sydney, in the
Colony, of New South Wales, Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly descubed
and ascertained in and by the following statement.—
This invention has reference to the method of and apparatus for sharpening or
setting cutters of sheep-shearing and the lihe machines the improved method
relating particularly to the grand or set of said cutter so that the under-face of
what may be termed the "heel" of the cutter is in a plane lower than the plane
of the under surface of the cutting fingers and the improved apparatus relating
particularly to a revolving disc coated with emery or the like which has a
peculiarly constructed surface so that the cutter ground upon it will have the
improved characteristic before mentioned But in order that this invention may
be clearly understood reference will now be made to the drawing herewith in
which Figure 1 is an elevation of an apparatus for sharpening cutters of sheep-
shearing and like machines constructed with two grinding discs according to this
invention. Fig 2 shows side or edge view of a cutter sharpened or set according
to this invention as it would lie upon the grinding disc and Figure 3 is a similar
view of the same as it lies upon a flat surface or the face of the comb of the shearing
machine Fig 4 is a face view of the grinder and Fig 5 a sectional elevation of
one end of same.
A are gunding discs B their spindle carrying fast and loose driving pullies C
and D is the frame The disc A has its outer part as its working face the centre A
being slightly raised and free from coating. The working annulus or gunding
surface consists of the flat A" and the depression A' both being coated with fine
emery powder The face of the depression A¹ in practice is just appreciably and
no more below the surface A'.
In use the cutter a is held on the faces A' and A³ with the "heel" a pressed
against the edge of the centre A so that said heel is above the depression A' and
will thus be ground "longer" than the knife part of the cutter In its working
position the cutter is as shown in Fig 3 with the points a' of its fingers on the
comb and its heel as providing for an elasticity on the contact of the cutter and
comb which is extremely beneficial in practice
Having now particularly described and ascertained the nature of my sari
invention and in what manner the same is to be performed, we declare that what
we claim 15.―
First Improved method of sharpening or setting the cutters of sheep shearing
and like machines so that the under-face of the heel of said cutters is in a plane
lower than the plane of the under surface of the cutting fingers substantially ns
herein deenhed and explained

page_text: Second. Improvement in apparatus for sharpening or setting the cutters of
sheep shearing and like machines consisting of the particular construction of the
face of the grinding disc having an idle central part such as A a coated depression
such as A and a coated flat such as A substantially as herein described and
explained and as illustrated in the diawings.
Dated this Ninteenth day of November One thousand eight hundied and
Witness:
FRED WALSH,
A. MELCHIOR.
Patent Agent, Sydney, NSW,
Bottomley & Liddle,
154, St Vincent Street, Glasgow, Applicant's Patent Agents