Year: 1888

page_text: WILLIAM ELI PLESTED, Manor Park Aylesbury, Bucks, Joiner, do hereby declare
the nature of this invention to be as follows :-
My invention will do away with the oil stone as now used. It consists of a roller,
supported in a cast iron stand with an appliance affixed for holding the plain iron or
chisel while being sharpened. It will enable one who has had no experience to do
what has hitherto required much skill and practice to perform. It will also sharpen
in a much shorter time than is possible to be done by the oil stone as now used.
Dated th: 10th
T1000

page_text: COMPLETE SPECIFICATION.
Improved Means for Sharpening Plane Irons, Chisels, and other
Joiners' Tools.
I, WILLIAM ELI PLESTED of Manor Park Aylesbury Buckinghamshire, Joiner
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 has for object to provide a ready and efficient means for sharpening
plane irons chisels and other joiners tools after they have been ground, thereby doing
away with the use of the oil stone and enabling inexperienced persons to properly
sharpen their tools, which has hitherto required great skill and practice and a far
longer time than is required when using my apparatus. A sharpening machine
constructed according to my invention consists essentially of a roller or cylinder of
metal, such as steel, cast iron, or zinc, mounted so as to be capable of being rotated,
and of a rest or other suitable means for holding the tool firmly in position whilst
being sharpened.
In the accompanying sheet of drawings.
Fig. 1 is a plan of a machine for sharpening plane irons, chisels and the like
constructed according to my invention, and
Fig. 2 is a front elevation.
Fig. 3 an end view, and
Fig. 4 a vertical cross section of the same.
The sharpening roller or cylinder a is mounted in bearings b on the main frame c
and consists of a zinc bush a cast or otherwise secured to a metal bush d provided
with end flanges e and fixed on a shaft f'running in the bearings b. The shaft is
provided with a handle g by means of which it can be rotated. The rest for
enabling the plane iron or chisel to be held firmly in position whilst being sharpened
is adjustably secured to the main frame c by means of studs I screwed into the rest
and passing through slots in the main frame c and provided with nuts, for enabling
the sharpening bevel to be varied.
The planes or chisels to be sharpened are gently forced down and held between the
rest and the zinc cylinder which latter is rotated towards the edge of the tool by
means of the handle g.
When desired to give increased cutting power to the zinc cylinder, emery powder
or dust mixed with oil is applied to it.
It is evident that the construction of apparatus according to my invention may be
modified in various ways to suit the particular tools to be sharpened without departing
from the nature of my invention. For instance the roller or cylinder a instead
of being straight may be corrugated or curved for sharpening gouges, beading tools
or moulding planes.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. In apparatus for sharpening tools the employment of a roller or cylinder of
metal mounted in bearings and provided with means for rotating it substantially as
described.
2. The construction of a machine for sharpening tools consisting of a roller or
cylinder of metal mounted in bearings and provided with means for rotating it and of
a rest for enabling the tool to be firmly held in the proper position whilst being
sharpened substantially as described.
3. The construction of apparatus for sharpening tools substantially as described and
illustrated in the drawings.
n
T
1
1000
WHEATLEY & MACKENZIE,
156, Strand, London, W.C.,
Agents.