or Improved Apparatus for Reciprocating Upon and Feeding to Grindstones and the like, Reaper Knives and Edge Tools, for the Grinding of the same.
Year: 1894

page_text: Date of Application, 21st Nov., 1894
Complete Specification Left, 13th July, 1895-Accepted, 14th Sept., 1895
PROVISIONAL DIECIETATION
New or Improved Apparatus for Reciprocating Upon and Feeding to
Grindstones and the like, Reaper Knives and Edge Tools, for the
Grinding of the same.
We, HARRY ADOLPHUS MITCHELL of 122 Alderson Road, Sheffield in the
County of York, Manager of Machine Knife Workers and GEORGE ALFRED
GARFITT and CHARLES GARFITT trading as Thomas Garfitt and Son of Cross
Scythes Works London Road Sheffield aforesaid, Manufacturers, do hereby declare
the nature of this invention to be as follows:-
This invention relates to apparatus or mechanism employed for moving reaper
knives or edge tools backwards and forwards upon the face of a grindstone or disc
of other abrasive material and for feeding the said knives or tools thereto during
the process of grinding the same, and the object thereof is to devise a simple and
effecient apparatus which will perform the same in a satisfactory manner thus
performing by machinery what has hitherto been either wholly or partially
performed by manipulation, to attain which we either make with or attach to one
end of the grindstone trough a slide bed upon which we mount a feed slide bed
capable of lateral adjustment and upon the said feed bed we mount a kuife or tool
carrier which receives a reciprocating motion from a connecting rod and disc-crank
which latter has an adjustable crank pin so as to give to the tool carrier the required
amount of travel.
The said disc-crank is carried upon a horizontal shaft supported at one end
upon the grindstone trough by a hanger and at the other end upon a bracket made
with or attached to the cross slide or feed bed. The said horizontal shaft is geared
by bevel wheels to a cross shaft which receives an ordinary driving pulley and has
an ordinary clutch box and motion applied thereto for starting and stopping the
apparatus as required.
The feed mechanism for the lateral adjustment of the feed bed consists of a
horizontal screw which works in a nut fitted to said bed and is carried in suitable
bearings made with or fixed to the trough slide-bed and extends beyond the same
in order to receive a suitable worm wheel with which gears a worm carried upon
the said trough bed by a shaft having a hand wheel.
As the grindstone becomes smaller in diameter by wear it will be obvious that
the reciprocating slide and feed slide bed with the crank dise and connecting
rod must be adjusted laterally, and this is accomplished by the feed mechanism
before described and allowing the horizontal shaft which carries the said disc crank
and bevel wheel to move laterally through the hanger for which purpose we secure
the said bevel wheel to the horizontal shaft by a lengthened key way and feather
key as will be well understood.
In a modification of our improved apparatus we obtain a more refined reciprocating
movement of the tool box or carrier and dispense with the lateral movement of the
horizontal shaft in the adjustment to reduced size of grindstone by placing the disc-
crank upon a second horizontal shaft and causing the said second shaft to oscillate
the first horizontal shaft by means of a lever which is coupled thereto by a boss
and set screw and works through a hinged or free crank pin head in which
arrangement we fix to the first shaft a lever in place of the original crank-disc and
couple thereto the connecting rod which reciprocates the knife or tool box or

page_text: reciprocating bed. In this arrangement both horizontal shafts are carried upon the
grindstone trough and one receives a rotary motion from an ordinary pulley as
before described with reference to the original arrangement and the other receives
an oscillatory motion therefrom and it will be obvious that when adjusting the feed
bed to suit the size of grindstone it will only be necessary to loosen the lever which
reciprocates the tool or knife box or carrier or slide upon the oscillating shaft and
then move the same with connecting rod to position required and again tighten
said lever to shaft in which case nither shaft requires lateral adjustment.
Dated this 7th day of November 1894.
New or Improved Apparatus for Reciprocating Upon and Feeding to
Grindstones and the like, Reaper Knives and Edge Tools, for the
Grinding of the same.
We HARRY ADOLPHUS MITCHELL of 122 Alderson Road Sheffield in the
County of York, Manager of Machine Knife Makers, and GEORGE ALFRED
GARFITT and CHARLES GARFITT trading as Thomas Garfitt & Son, of Cross
Scythes Works, London Road Sheffield aforesaid Manufacturers, 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:-
This invention relates to apparatus or mechanism employed for moving reaper
knives backwards and forwards upon the face of a grindstone or other abrasive
material, and for feeding the said knives or tools thereto during the process of
grinding the same, and the object thereof is to devise a simple and effecient
apparatus which will perform the same in a satisfactory manner, thus performing
by machinery what has hitherto been either wholly, or partially performed by
manipulation; to attain which we arrange and work our improved apparatus
substantially as described with reference to the accompanying drawings, in which
Fig. 1 is a side view of our apparatus arranged with an ordinary grindstone
trough, Fig. 2 is an end elevation and Fig. 3 is a plan of same.
Fig. 4 is a side elevation of a modified arrangement of our apparatus arranged
with an ordinary grindstone trough and Fig. 5 is a plan of same.
Fig. 6 is an end view of a modified arrangement or means we employ for
produceing an oscillating from a revolving motion in connection with our improved
apparatus.
Similar letters of reference denote corresponding parts in each view. We make
with or attach to one end of the grindstone trough A, a slide bed B, upon which we
mount a feed slide bed C capable of lateral adjustment, and upon the feed bed C
we mount a reaper knife or edge tool carrier D, which receives a reciprocating
motion from a connecting rod G and disc crank H, which latter has an adjustable
crank pin so as to arrange for the tool carrier D to receive the required amount
of travel.
The said disc crank H is carried upon a horizontal shaft J which is supported at
one end upon the grindstone trough A by a hanger or bracket K and at the other
end upon a bracket c¹ made with or attached to the cross slide or feed bed C.
The said horizontal shaft J is geared by bevel wheels j¹ and j² to a cross shaft M,
which receives an ordinary driving pulley P and has an ordinary clutch box pl, and
motion applied thereto for starting and stopping the apparatus as required.
The feed mechanism for the lateral adjustment of the feed bed consists of a

page_text: horizontal screw O which works in a nut o' fitted to the
bearings o² and o³ made with or fixed to the slide bed B.
feed screw O receives a hand wheel Q.
bed C and is carried in
The front end of said
As the grindstone E becomes smaller in diameter by wear, it will be obvious
that the reciprocating slide D and feed slide bed C with the crank disc H and
connecting rod must be adjusted laterally, and this is accomplished in a small way
by the feed mechanism before described and when required further by moving the
horizontal shaft J which carries the connecting rod G and disc H laterally
through the hanger K, for which purpose we secure the bevel wheel to the
horizontal shaft J by a lengthened key way t¹ and feather key t as will be well
understood.
In a modification of our improved apparatus we obtain a more refined or uniform
reciprocating movement of the tool box D, and dispense with the required lateral
movement of the horizontal shaft J in the adjustment to the reduced size of
grindstone E, by placing the disc crank H on a second horizontal shaft (see
Figs. 4 and 5) and causing the said shaft to oscillate the shaft J by means of a
rat-tail lever ³, which is coupled thereto by a boss h and set screw h
The lever 3 works through a free or hinged crank pin head A'. In this arrange-
ment we fix upon the shaft J the lever j³ in place of the original crank disc, and
couple thereto the connecting rod G which reciprocates the knife or tool carrier D,
and both shafts and J are carried upon the grindstone trough A and are not
movable laterally.
The shaft receives a rotary motion from the ordinary pulley P and bevel
wheels and, and the shaft J receives an oscillatory motion therefrom in the
manuer described, and it will be obvious that when adjusting the feed bed C to
suit the size of grindstone it will only be nessary to loosen the lever j³ and slide
it together with the bearing c¹ on the horizontal shaft J and again tighten said
lever jon shaft J.
When desired a part of the shaft J may be square and the lever ³ may have a
boss through which the square shaft passes, and the boss may extend through the
bearing and receive a nut on the opposite side in order to make a firm
attachment of the lever j³ to the shaft J.
Where preferred the crank pin may be fitted firmly to the disc crank H, in
which case we employ the arrangement shown at Fig. 6, for oscillating the shaft J
from the rotating shaft, that is we connect to the pin a pivotted lever N by a
rod n', the pivot ² being fixed to the grindstone trough, and we fasten to the
shaft Ja lever and couple it to the lever N by a rod n³. By this arrangement
it will be obvious that a inore refined or uniform motion of the box or carrier D is
produced.
When it is desired to grind razors or other edge tools hollow it is only required
to employ a grindstone E sufficiently small in diameter.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In apparatus for reciprocating upon and feeding to grindstones reaper knives
or other edge tools for grinding the same, the combination with a slide bed B of a
feed bed C and reciprocating carrier D substantially as described and illustrated at
Figs. 1, 2 and 3 of the accompanying drawings.
2. In apparatus for reciprocating upon and feeding to grindstones reaper knives
or other edge tools for grinding the same the combination with a slide bed B feed
bed C and reciprocating carrier D of a crank H connecting rod G and revotable
shaft J substantially as described and illustrated at Figs. 1, 2 and 3 of the
accompanying drawings.
3. In apparatus for reciprocating upon and feeding to grindstones reaper knives
and other edge tools, the combination with a slide bed B feed bed C and reciprocating
carrier D of a lever 3 connecting rod G and shafts J and 4, the revotable shaft j

page_text: oscillating the shaft J by means of the mechanism shown at Figs. 4 and 5 or the
mechanism shown at Fig. 6 or any mere modification of said mechanism
substantially as described and illustrated at Figs. 4, 5 and 6 of the accompanying
drawings.
Dated this 10th do of T.1- 1905
H. F. BOUGHTON,
Barnsley, Registered Agent.