Year: 1885

page_text: I GEORGE JAMES FREDERICK TATE, of 219, Brixton Road, in the county of
Surrey, Engineer's Assistant 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:-
My invention relates to improvements in the construction of rotary knife
cleaning machines whereby the knives to be cleaned can be passed and held
between the rotating discs in a position diametrically at right angles to the axis of
the same; the strips of polishing material can be reversed and be easily and
quickly renewed when worn out and the construction of the parts of the machine
are much simplified.
In order to enable my invention to be fully understood I will describe the same
by reference to the accompanying drawing in which figure 1, is a side elevation
and figure 2, an end view of a knife cleaning machine constructed according to my
invention and shewing a knife in position therein; figure 3, is a longitudinal
section and figure 4, a transverse section of the same. Similar letters in all the
figures represent similar parts.
a, represents the stand or frame of the machine in which the rotating discs b, b₁,
rotate; the stand or frame a is formed with bosses c, c', to support the same; each
of the discs b and b, is provided with a separate spindle fixed thereto; the
spindle d, of the disc b, passes through and revolves in the boss c, and the spindle d',
revolves on the end of an adjustable screw e, working in the boss c¹; f and f¹, are
the strips of polishing material each of which I form by covering a flat ring a³, of
wood or the like on both its sides with felt or other suitable material; by this
means when the polishing material on one side of the rings has been worn out the
rings can be reversed so as to present the opposite sides for use; the inner faces of
the discs b and b, are formed with annular ledges or projections 62, which serve to
hold the polishing strips f,f', in position on the discs without the aid of cement
or the like; the disc b, is operated by means of a handle g, screwed onto its
spindle d, and the other disc b¹, rotates therewith by reason of the contact of its
polishing strip f¹, with that of the disc b; h, is a set nut for maintaining the
screw e, in position when it has been properly adjusted; i, is a hole in the disc b,
to allow of the introduction of the usual polishing powder between the discs; j, is
a slot or opening in one end of the stand a, to allow of the blade of the knifo k,

page_text: being passed between the faces of the polishing strips, f, f, and forming a support
or guide for the knife.
To make use of a knife cleaning machine of this construction the disc b, having
been adjusted by means of the set screw e, so as to regulate the pressure of the
polishing strip f', against the polishing strip f, and the required supply of polishing
powder introduced through the hole i, the blade of the knife k, is passed through
the slot or opening j, and between the polishing strips f and f¹, as shewn in the
drawing the discs b and b, being provided with independent spindles d, and d¹
allowing the blade of the knife to pass directly through the axial line of the discs;
the handle y, is then turned and the knife is moved about in the manner usual
when using rotary knife cleaning machines until the whole of the knife blade has
been polished by being rubbed between the polishing strips f. f.When it is
required to remove the discs b, 6' from the stand a, for the purpose of renewing the
polishing strips f, f¹, or for reversing them or for other purposes it is simply
necessary to withdraw the set screw c, when the disc b₁, can be taken out of the
stand; by then unscrewing the handle g, from the spindle d, the disc b, can also be
taken out, and it will be obvious that by a reverse series of movements the parts
can be as readily replaced in working order.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The improved knife cleaning machine hereinbefore described and represented in
the accompanying drawing.