Improvements in Apparatus for Sharpening Endless Band Knives.
Year: 1893

page_text: Date of Application, 16th May, 1893-Accepted, 17th June, 1893
COMPLETE SPECIFICATION.
Improvements in Apparatus for Sharpening Endless Band Knives.
I, HAROLD BULKELEY REYNOLDS of 40 Stockton Road, Chorlton-cum-Hardy,
in the County of Lancaster, Mechanical 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 :-
My invention relates to apparatus for sharpening endless band knives and
consists in an apparatus by means of which the sharpening of such band knives
while they are in motion and in position in the machines in which they are
employed may be very readily and efficiently accomplished.
In constructing the apparatus in which my invention consists I employ a
grinding wheel or disc of emery or other suitable abrasive material and cause
such grinding wheel or disc to be revolved by motion derived from the endless
band knife which is to be ground by means of such apparatus. The said grinding
wheel or disc is so mounted that it may be moved or adjusted as may be desirable
or necessary towards or away from the knife in conjunction with which it is to be
employed Motion is transmitted to the said grinding wheel or disc by means of a
driving roller which is caused to bear against the endless band knife to be ground
and transmits motion to the grinding wheel or disc by means of suitable gearing.
In conjunction with the said driving roller I arrange another roller by means of
which the band knife may be pressed into contact with such driving roller to the
required extent.
An apparatus constructed according to my invention is illustrated in the
accompanying drawing in which Fig. 1 is a front view, Fig. 2 a side view, and
Fig. 3 a plan of such apparatus. Fig. 4 is partly a section taken on the plane
indicated by the line (A) (B) of Fig. 1 and partly a side view. The same letters
of reference are applied to corresponding parts in all the figures.
(a) is the grinding wheel or disc which is mounted fast upon a shaft (b) mounted
so as to be capable of being revolved in bearings formed in a frame or arm (c).
The shaft (b) is prevented from being moved longitudinally in the frame or arm (c)
by means of a collar (6) formed upon such shaft (6) and a collar (62) secured
thereto by means of a set screw (63). The frame or arm (c) is mounted upon a
body or standard (d) so as to be capable of being turned thereon about a
projecting collar (d¹). Set screws (e) which pass through curved slots concentric
with the projecting collar (d') are screwed into the frame or arm (c) and enable
such frame or arm (c) to be secured in position upon the body or standard (d).
Between the heads of the set screws (e) and the body or standard (d) spring
washers (f) are placed so that while the set screws (e) may secure the frame or
arm (c) against accidental turning, it is possible by pressure exerted upon the
handle (c) with which the frame or arm (c) is provided, to turn the frame or
arm (c) in relation to the body or standard (d) as will be hereinafter described.
In the body or standard (d) and concentric with the projecting collar (d') thereon,
a stud. (9) is secured by means of a nut and upon such stud (9) and free to revolve
thereon is mounted a sleeve (h) which has formed upon it a bevel wheel (i) and
has secured to it a driving roller (j) the circumference of which is covered with
indiarubber or leather (j) or other similar material in order that the band kuife
with which the apparatus is to be used may more readily impart motion to such
driving roller (). The teeth of the bevel wheel (i) gear into or engage with the
teeth of a bevel wheel (k) secured upon the shaft (b). (m) is the roller which I
arrange in conjunction with the driving roller (j). The roller (m) is mounted
upon a stud. (n) secured in an arm (o) mounted so as to be capable of being turned
upon a stud (p) secured in the body or standard (d). Through a hole formed in the

page_text: arm (o) passes a rod (9) which is formed with a head or handle (g) and with
screw-threads and is arranged so as to be capable of being screwed more or less
into the body or standard (d). (r) is a spring which being mounted upon the
rod (g) bears at one end against the head or handle (g) and at the other end
against the arm (o) and when compressed tends to press the roller (m) in the
direction indicated by the arrow (C) and into contact with the driving roller (i).
The body or standard (d) is provided with feet (d2) which are preferably provided
with pads (3) of indiarubber or other elastic material.
When the apparatus illustrated in the accompanying drawing is to be employed
to sharpen an endless band knife the body or standard (d) is placed in a suitable
position upon the table of the machine in which such band knife is employed and
the part of the band knife which when in motion moves in a downward direction
is placed between the driving roller (1) and the roller (m) in the position indicated
by the dotted line (D) in Fig. 1 and the apparatus illustrated in the accompanying
drawing is adjusted in position so that the grinding wheel or disc (a) when moved
into contact with the endless band knife will be in a suitable position in relation
thereto so that the grinding wheel or disc (a) when caused to revolve will sharpen
the said band knife in the manner required. When the body or standard (d) has
been adjusted into the required position the handle or head (9¹) of the rod (q) is
turned so that the spring (7) will be caused to act upon the arm (0) and cause the
roller (m) to press the endless band knife into contact with the driving roller (j) to
the required extent. The endless band knife is then put in motion so that the part
thereof passing between the roller (m) and the driving roller (j) will move in a
downward direction. The movement of the band knife will cause the driving
roller () to revolve in the direction indicated by the arrow (E) and by means of
the bevel wheels (i) and (k) cause the grinding wheel or disc (a) to revolve in the
direction indicated by the arrow (F). The frame or arm (c) is turned by means of
the handle (c) with which it is provided in the direction indicated by the
arrow (G) until the revolving grinding wheel or disc (a) is caused to act upon the
endless band knife as such band knife passes the operating edge or face of the said
grinding wheel or disc (a). The action of the grinding wheel or disc (a) upon the
endless band knife may be controlled by means of the handle (c¹). When the
required sharpening of the endless band knife has been accomplished the handle (c¹)
is turned in the direction opposite to that indicated by the arrow (G) so that
the grinding wheel or disc (a) is moved out of contact with the endless band knife
and the handle or head (¹) being turned so as to relieve the roller (m) of the
pressure exerted upon it by the spring (r) to the required extent and the apparatus
is removed from the machine in which the said endless band knife is employed.
When the apparatus above described is in use in sharpening an endless band
knife the pads (d³) of indiarubber or other elastic material upon the feet (d²) of
the body or standard (d) are pressed into contact with the table of the machine in
which such endless band knife is employed and serve to hold the apparatus above
described in position but in case it is preferred the apparatus in which my
invention consists may be secured in position while in use in any other suitable
manner.
In cases in which it may be preferred the movement of the frame or arm (c)
necessary to move the grinding wheel or disc (a) into or out of contact with the
endless band knife being operated upon may be effected by means of any suitable
arrangement of screw and nut operated in any convenient manner instead of by the
handle (c).
It is obvious that the details of the construction of the apparatus constructed
according to my invention may be somewhat varied.
The apparatus in which my invention consists may be very readily put into
operation and may be very readily removed from the machine in which an endless
band knife is employed after the sharpening of such endless band knife and by
reason of the ease by which the apparatus, in which my invention consists, may be
adjusted into position and by reason of the motion of the grinding wheel or disc (a)

page_text: being derived from the endless band knife which is being ground and the ease by
which the action of the grinding wheel or disc upon the band knife being sharpened
may be controlled it is possible for the sharpening of endless band knives to be
very readily accomplished in a satisfactory manner.
In consequence of the endless band knife which is being ground being caused to
pass between the roller (m) and the roller (j) the grinding wheel or disc (a) is
enabled to act upon such endless band knife in a satisfactory manner.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :--
1. An apparatus for sharpening endless band knives which is provided with a
driving roller receiving motion from the band knife to be ground and with a
grinding wheel or disc receiving motion from the said driving roller and capable of
being moved into position to act upon the said endless band knife, substantially as
hereinbefore described in reference to and illustrated in and by the accompanying
drawing.
2. An apparatus such as is herein before described for sharpening endless band
knives, which is provided with a grinding wheel or disc such as (a) which may be
moved into position to act upon the endless band knife to be ground and receives
motion by means of gearing from a driving roller such as (j) between which and
another roller such as (m) the endless band knife being ground is caused to pass,
all arranged employed and operating substantially in the manner hereinbefore
described.
3. In an apparatus for sharpening endless band knives a grinding disc or wheel
such as (a) which is mounted so that it may be moved into position to act upon the
endless band knife to be ground and receives motion by means of gearing from a
roller (j) between which and another roller (m) the said endless band knife is
caused to pass, substantially in the manner hereinbefore described in reference to
and illustrated in and by the accompanying drawing.
4. In an apparatus for sharpening endless band knives a grinding disc or wheel
such as (a) receiving motion from the endless band knife to be ground and mounted
so as to be capable of being moved into position to act upon such endless band
knife, a driving roller such as (j) and a roller such as (m) all arranged employed
and operating for the purposes and substantially in the manner hereinbefore
described in reference to and indicated in and by the accompanying drawing.
Dated this Fifteenth day of May 1893.
HOWARD
CHEETHAM.
Manchester, Agent to the Applicant.