Improvements in Apparatus for Grinding Scythes and other Tools and Implements.
Year: 1893

page_text: Date of Application, 11th July, 1893
Complete Specification Left, 27th Jan., 1894-Accepted, 14th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Grinding Scythes and other Tools
and Implements.
I, JOHN POWELL 16 Olivet Road Norton Woodseats near Sheffield Engineer
do hereby declare the nature of this invention to be as follows: -
This invention relates to an apparatus for the easier and safer means of scythe
grinding and other tools and implements that are required to be ground from time
to time. Hitherto scythe grinding has been very laborious and very dangerous
work. I propose to introduce an apparatus of wood, iron, or other suitable
materials constructed with metal shafts, wheels, plain or cog wheels, bevelled wheels,
pinion wheels and racks, connecting rods, and saddle or scythe holder, which are
worked by means of their connection with a vertical grooved shaft of iron or steel
as the case may be.
I will now endeavour to describe the said apparatus or scythe grinding machine.
It is constructed with two standards namely right and left sides made preferably
of cast iron in which slots are provided for the insertion and motion of the pro-
jections of and for the saddle or scythe holder to work in up and down to the
required extent. In connection with this arrangement is a vertical shaft of iron or
steel which is grooved for the purpose of connecting by a slide arrangement
wheels, lever, and counter weight which are in gear with the saddle or scythe
holder for the purpose of regulating the pressure of the article to be ground upon
the face of the grinding stone. The saddle or scythe holder is so arranged as to
enable the operator to place the articles to be ground at any required angle. The
said apparatus is provided with a shaker that is to say to give to scythes or other
tools and implements that shaking motion which is absolutely necessary in the
process of grinding scythes, or other tools and implements.
The said apparatus should be fixed when working by preference at the front side
of the grinding stone and bolted down to a bed plate. The scythe would be so fixed
in the saddle or holder that its whole length can be traversed forward or back-
It will be seen by this arrangement
ward across the surface of the grinding stone.
that a uniform pressure of the scythe upon the surface of the stone is obtained. So
that instead of the grinding stone being as they usually are in working worked into
hollow places on the surface which creates so much hacking and truing of the
surface of the stone, the effect of my invention will be at all times to keep the
working surface of the grinding stone in the best possible condition and so effect
a saving at least of filtyper cent. in the wear and waste of grinding stones.
The grinder would by this method be in much less danger in the case of a stone
breaking, as this apparatus would be a shield and protection by the fact of it being
bolted down to the grinding stone bed plate frame.
Dated this Seventh day of July 1893.
TOTT T AY TATT

page_text: COMPLETE SPECIFICATION.
-
Improvements in Apparatus for Grinding Scythes and other Tools
and Implements.
I JOHN POWELL of 16 Olivet Road Norton Woodseats near Sheffield 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:
This invention relates to an apparatus for-the easier and safer means of grinding
scythe and other tools and implements that are required to be ground from time to
time.
Hitherto scythe grinding has been very laborious and very dangerous work.
I propose to introduce an apparatus of wood, iron or other suitable materials
constructed with metal shafts, wheels plain or cogwheels bevelled wheels pinion
wheels and racks connecting rods and saddle or scythe holder which are worked by
means of their connection with a vertical grooved shaft of iron or steel as the case
may be.
"I will now endeavour with the aid of the drawings, to describe the said apparatus
or scythe grinding machine. It is constructed with two cast iron standards, namely
right, and left, in which slots are provided for the insertion and motion of the
projections of and for the saddle or scythe holder to work in, up and down, to the
required extent.
Fig. 1 Sheet I shews a side view of machine, A being one of the two standards
or. sides in which the saddle and scythe holder slides in the slot B the whole of
which is counterbalanced by the weight C, so that by working the lever D, which
also works on pinion wheel working in wheel E, the whole body of the machine
may be moved at will, either up or down the two standards. The lever D being
fitted with sliding bolt and spiral spring, and the boss of pinion wheel notched
with holes to suit; the lever can be worked in the same manner as an ordinary
ratchet.
Attached to lever D is. the weight F, so that when the weight F hang's perpen-
dicular, the whole is ballanced by weight C and therefore stands stationary: When
the lever. D is moved and the weight is raised to an angular or horizontal position,
it rises the saddle and scythe-holder on the one side or lowers it on the other to the
required height or depth as the case may be.
As the grindstone is worn down with the grinding, the saddle and scythe-holder
may: lowered to suit, by lowering.screw G and working lever D.
The scythe-holder H is fitted with rollers top and sides, between which, the wood
to which the scythe to be ground is fastened, may be made to traverse backwards
or forwards. across the stone at will. The scythe-holder has also a circular, and an
oscillatory motion, in order to keep the grindstone round on the face; to enable
the operator to grind the curved point of the scythe.
In order to give the scythe or other implement to be ground; that shaking motion
which is essential in the grinding; the machine is provided with a shaker. The
arm I of scythe-holder, is made to slide backwards and forwards in part of the
saddle, namely K, Fig. 1, the arm being connected by rod L to lever M, which is
made to oscillate by disc N, and movable crank pin; the working of which is shewn
more clearly in Fig. 2 Sheet 2. The stroke of the shaker can be regulated from
nothing, to four inches.
Fig. 3 Sheet 3 is a drawing of saddle shewing how the scythe-holder may be
fixed to any bevel. The part O is made to slide up and down the standards, and is
connected with the saddle by screw a and two connecting rods b. By raising or
lowering screw a the arm of the scythe holder is put to any angle, and may be
locked at the required bevel by the screws c.

page_text: .
The effect of my invention will be at all times, to keep the working surface of the
grinding stone in the best possible condition, and so effect a saving at least of
fifty per cent. in the wear and waste of grinding stones.
The grinder would by this method be in much less danger in the case of a stone
breaking, as this apparatus would be a shield and protection, by the fact of it being
bolted down to the grinding stone bedplate frame.
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: