Year: 1887

page_text: Date of Application, 1st June, 1887
Complete Left, 3rd Apr., 1888
Complete Accepted, 18th May, 1888
JOHN HARRISON of Castle Bytham in the County of Lincoln, Engineer, do hereby
declare the nature of this invention to be as follows:-
A pair of small revolving discs, which are made of, or faced with, a suitable
material for cleaning the knives, are mounted face to face; upon the ends of two
shafts; or two spur pinions, in a peculiar manner, which allows the discs to move
obliquely to their axis; aud being held together by a spring, they adjust themselves,
to the bevil and thickness, of the knife which is passed between the two discs, to be
operated upon.
I will now proceed to describe how my invention may be carried into practical
effect. I prefer to mount the whole of the apparatus, upon a metal frame, which can
be fixed to the top of an ordinary table; and the cleaning discs in a vertical position
between two uprights, or standards, and attach the discs to a projection on the end of
spur pinions, through which they are caused to revolve; the manner in which the
discs are attached, to the end of spur pinions, or shaft, as case may be, by which they
are caused to rotate, is an important feature of my invention, as it must allow an
oblique movement, of the discs, in order, that they may adjust themselves, to the
bevel of the knife blade, which is being cleaned, as they revolve this can be
accomplished, through a spring, or springs, which forms the attachment, and is fixed
to the shaft, or the projection on spur pinion; or one, or both, of the discs, may be
attached to the end of the actuating pinion, or shaft, by what is known as a universal
joint: But I prefer to attach the discs, to a projection, on the ends of two small
spur pinions, by a joint, or pivot, at the back of each of the discs; the axis, of the
two joints, being at right angles, to each other; and intersect, the axis, upon which
the discs, and pinions rotate; and prefer, to make the pinions, to which the discs
are attached, to rotate upon studs, which are in line with each other, and placed
in an horizontal position; or parallel with the table, to which the apparatus is
fixed; one of the studs being fixed to an upright, or standard, of the frame; the
other stud, or shaft, is held by another upright, or standard, and is provided with
a second bearing to give steadiness; as this stud, or shaft is allowed an end wise
movement, to press the two cleaning discs together, and is encircled by a spiral

page_text: spring, which butts against, the back bearing, and a pin, or collar, on the stud
or shaft, and the cleaning disc, being mounted upon the other, end of this stud
or shaft, the whole is pressed, to the cleaning disc, which is mounted, upon the
fixed stud, the pinion being wide, enough to be in gear, as the face of the
cleaning discs wear; In cases where a spring attachment, is used between
the pinions, and discs, both studs may be fixed; as the spring, will answer the
double purpose of pressing the face of the discs together, and at the same time,
allow the discs to incline to their axis, to adjust themselves to the bevel of the
knife and which I have previously described, as an oblique movement: At the
upper end of the frame standards, I mount in suitable bearings, a shaft, parallel
with the axis, of the cleaning discs, to which is fixed, two spur wheels, which
gear into the spur pinions, to which the cleaning, discs are attached, and I. fix a
crank handle, to one end which projects beyond the bearing, through which the
machine is set in motion.
When emery powder is used, with the cleaning discs, a trough is provided,
for the purpose of supplying, the powder, or the cleaning discs can be completely
encircled, with a casing, with suitable openings, to allow the knife to pass through.
Dated this 30th love of Mar 1987

page_text: JOHN HARRISON of Castle Bytham in the County of Lincoln 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 :-
A pair of small revolving discs which are made of or faced with a suitable material
for cleaning the knives are mounted face to face upon the ends of two shafts, or spur
pinions in a peculiar manner; which allows the discs to move obliquely to their axis;
and being held together by a spring they adjust themselves to the bevil and thickness
of the knife; which is passed between the two discs to be operated upon.
I will now proceed to describe and ascertain, with reference to the accompanying
drawings how my invention may be carried into practical effect.
Fig. 1, of drawings shows a part sectional elevation of machine complete; Fig. 2,
an end elevation of the same, Figs. 3, 4, and 5 show two different ways of mounting
the cleaning discs.
I prefer to mount the whole of the apparatus upon a metal frame as shown in
Figs. 1 and 2 of the accompanying drawings; A is the frame screwed to an ordinary
table B by screw b1; The cleaning discs c, and c, 1; are attached to end of pinion e,
and e, 1; by projections f and f, 1, through which they are caused to revolve:
pinions e and e, 1; rotate upon studs hand h, 1; the stud h, being fixed to
standard d, 1; and the stud or shaft h, 1; passes through standard d; and is
provided with a second bearing d 2; to give steadiness, as the shaft h, 1; is allowed
an endwise movement and is pressed to discs c and c, 1, by spiral springs, which act
upon pin p; which is fixed in shaft h, 1; This is to give pressure upon knife; and
will be clearly understood by reference to Figs. 1 and 2; of drawings the knife
being shown in position for cleaning and in section in Fig. 1; The pinion e is made
long enough to provide for wear and movement of cleaning discs.
The machine is put in motion by crank handle k; through spur wheels t and t, 1
which gear into pinions e, and e, 1; and are fixed to shaft q which turns in bearing r,
and r, 1; .A trough W, is provided to supply the discs with emery powder.
The manner in which the cleaning discs, are attached to pinions, or shafts as case
may be; is an important feature of my invention as it must allow an oblique move-
ment of the discs; in order that they may adjust themselves to the bevil of the
knife blade which is being cleaned. This may be accomplished by springs; or
spring; as shown in the accompanying drawings, in figs. 3 and 4.
m, is spring attached to disc at n; and to pinion at o; When the discs are mounted
in this manner, the spiral spring for pressing the discs together, may be dispensed
with; as the spring will answer the double purpose, of pressing the discs together;
and allowing an oblique movement.
Instead of attaching the discs by means of a spring, a universal joint may be used
as shown in Fig. 5; But I prefer to attach the discs, to pinion, or shaft as may be,
by a joint, or pivot, at the back of each disc the axis, of the two joints being at right
angles to each other; and intersect the axis upon which they rotate.
;

page_text: A convenient method of accomplishing this, is shown in Figs. 1. and 2; of the
accompanying drawings; the projections f and f1 have a half circular point; which
fits easily into cups g, and g 1; which have a half circular bottom; and are formed on
back of cleaning discs, The whole being held up by the spiral springs, form a
simple joint; which will give sufficient oblique movement to disc, and allow the
cleaning discs to be readily detached to renew the cleaning material or replace
the discs.
Having now particularly described and ascertained the nature of my invention,
and in what manner the saine is to be performed I declare that what I claim is
1st. A knife cleaning machine arranged and constructed as substantially, described 1
and shown in figs. 1 and 2 of the accompanying drawings.
2nd. The methods of mounting the cleaning discs to accomodate themselves to
bevil of the knife as substantially shown and described with reference to Figs. 1, 34
and 5 of the accompanying drawings.