IMPROVEMENTS IN GRINDING OR SHARPENING THE KNIVES OR SICKLES OF "which REAPING, MOWING AND OTHER MACHINES, AND IN APPARATUS THEREFOR
Year: 1885

page_text: I THOMAS CRITCHLEY BARRACLOUGH of 8 King Street, Manchester in the
County of Lancaster, Engineer do hereby declare the nature of said Invention
for "IMPROVEMENTS IN GRINDING OR SHARPENING THE KNIVES OR SICKLES OF
"which
REAPING, MOWING AND OTHER MACHINES, AND IN APPARATUS THEREFOR
Invention has been communicated to me from abroad by John Frederick Webster,
of Elkhart Indiana, America, Engineer, to be as follows:-
This invention relates to certain improvements in grinding or sharpening the
knives or sickles of reaping mowing and other machines and in apparatus therefor.
The improved apparatus consists of a base plate which carries a clamping device
and a rest for holding and adjusting the knife or sickle to be ground or sharpened;
secured to this base plate is an arm or frame which supports a hand wheel
preferably with internal teeth, on the axis of which is pivoted a swinging bracket
which carries a stud on which is a wheel and pinion, preferably cast together.
This pinion is always in gear with the toothed hand wheel and the wheel on the
stud gears into a pinion fixed on a shaft which carries a roller made of corundum,
emery, or other grinding substance, supported in a second swinging bracket
pivoted to the first and provided with a handle.
When motion is given to-the hand wheel the grinding roller is caused to revolve'
and by means of the handle on the second swinging bracket it may be guided to
bear upon and grind or sharpen the cutting edges of two adjacent teeth of the
knife or sickle which after grinding may be unclamped and moved forward as
required in order to bring the next cutting edges under the action of the grinding
roller.

page_text: Improvements in Grinding or Sharpening the Knives or Sickles
of Reaping, Mowing, and other Machines, and in Apparatus
therefor.
I THOMAS CRITCHLEY BARRACLOUGH, of 8 King Street, Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of said Invention
for IMPROVEMENTS IN GRINDING OR SHARPENING THE KNIVES OR SICKLES OF
REAPING, MOWING, AND OTHER MACHINES, AND IN APPARATUS THEREFOR, which
Invention has been communicated to me from abroad by John Frederick Webster,
of Elkhart, Indiana, America, Engineer, 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 certain improvements in grinding, or sharpening the
knives or sickles of reaping, mowing and other machines and in apparatus therefor.
The improved apparatus consists of a base plate which carries a clamping device
and a rest for holding and adjusting the knife or sickle to be ground or sharpened.
Secured to this base plate is an arm or frame which supports a hand wheel pre-
,ferably with internal teeth, on the axis of. which is pivoted a swinging bracket
which carries a stud on, which is a wheel and pinion, preferably cast together.
This pinion is always in gear with the toothed hand wheel and the wheel on the
stud gears into a pinion fixed on a shaft which carries a roller made of corundum,
emery, or other grinding substance supported in a second swinging bracket pivoted
to the first and provided with, a handle.
When motion is given to the hand wheel the grinding roller is caused to revolve
and by means of the handle on the second swinging bracket it may be guided to
bear upon and grind or sharpen the cutting edges of two adjacent teeth of the
knife or sickle which after grinding may be unclamped and moved forward as
required in order to bring the next cutting edges under the action of the grinding
roller.
And in order that this Invention may be fully understood and readily carried
into effect I will describe the accompanying two Sheets of Drawings reference
being had to the figures and letters marked thereon.
Figure 1 is a side view and Fig. 2 is a front view of the improved apparatus,
the grinding roller being shown raised or turned back. Fig. 3 is a side view and
Fig. 4
plan of the apparatus, the grinding roller being, shown in its lowest
position. Fig. 5 is a side view and Fig. 6 a plan of the clamping device with the
upper part removed. Fig. 7 is a front view and Fig. 8 a plan of the clamping
device with a knife bar, or sickle secured in position ready to be ground or
sharpened.
Similar letters refer to similar parts throughout the several views.
a is the base plate on which is secured the arm b which supports in suitable
bearings 61 the stud or axis c¹ of the hand wheel c which is provided with internal
teeth and a handle c³ on the stud c¹ is pivoted a swinging bracket d which
carries a stud e on which is a wheel e¹ and a pinion e' preferably cast together in
one piece. The pinion e² is always in gear with the teeth c² of the hand wheel c,
and the wheel el gears into a pinion g fixed on a shaft g¹ which also carries a

page_text: roller h made of corundum, emery, or other suitable grinding substance. The
shaft g on which the roller h is mounted is supported in a second swinging
bracket i pivoted on the stud e carried by the first bracket d and provided with
a handle the swinging brackets d and i with the grinding roller h may be moved
by means of the handle i¹ into any position required. The object of having the
handle i¹ of the shape shown is that it forms a stop engaging with the outer side
of the frame when the moving parts are swung back into the position shown in
full lines on Figs. 1 and 2.
The clamping device (clearly illustrated by Figs. 5 to 8) consists of a plate j
secured to or formed on the base plate a and to the front part of this plate jare
secured by screws j', two adjustable knife supports or rails the inner ends of
which are angled to conform approximately to the angle formed by the blades k¹
of the sickle or knife bar k. The supports may be adjusted end wise by loosening
the screws which rest in slots in the supports j. There is a longitudinal slot j³
intersected by a transverse slot j formed in the plate ; and there is a projection
on the under side of the knife clamp which projection is free to enter a space
between the plate ; and the base plate a but only at the point where the slot j³ is
intersected by the slot j. When the sickle or knife bar ke has been placed on the
knife supports and beneath the two front ends of the clamp 1, the knife bar / is
firmly secured in position by turning the lever m which is pivoted to the base
plate j and has a wedge shaped projection m³, the effect of turning the lever m
being to cause the wedge shaped projection m¹ to elevate the back end of the
clamp and depress the two front ends which bear upon and firmly grip or hold
the knife bar & in position, the blades / being supported by the rails j².
When the handle c³ is turned the wheel c is rotated and motion is communicated
by the teeth c to the pinion e³, wheel e¹, and so to the pinion g and the grinding
roller, and as the latter revolves it may be guided by means of the handle ¹ so
as to bear upon and grind or sharpen the cutting edges of two adjacent teeth or
blades of the sickle or knife bar k and when these sides have been sufficiently
ground the knife bar k may be released by a single movement of the lever m and
moved forward as required in order to bring the two next blades k¹ under the
grinding roller h.
Instead of the specially shaped grinding roller h a plain roller may be substituted
and the apparatus employed for ordinary grinding purposes by turning the handle
when the grinding roller is in the position shown in Fig. 1.
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
1. The construction, combination, and arrangement of parts forming the
improved machine for grinding or sharpening knife bars or sickles, substan-
tially in the manner and for the purposes herein set forth.
2. The clamping device for the sickle or knife bar, such device consisting of
adjustable knife supports mounted on a slotted plate, a clamp, and a pivoted lever
with a wedge shaped projection substantially as herein shown and described.
•
Dated this 1st day of September 1885,
H. B. BARLOW,
Agent for Applicant,
4, Mansfield Chambers,
17, St. Ann's Square, Manchester.
H. B. BARLOW,
Agent for Applicant,
4, Mansfield Chambers,
17, St. Ann's Square, Manchester,