An Improved Disc Sharpening Machine.
Year: 1893

page_text: Date of Application, 15th Sept., 1893
Complete Specification Left, 14th June, 1894-Accepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
An Improved Disc Sharpening Machine.
I, HEZEKIAH CASEY, Blacksmith, residing at Birmingham in the County of
Schuyler and State of Illinois, United States of America, do hereby declare the
nature of this invention to be as follows:-
This invention relates more particularly to sharpeners for discs of the kind used
in harrows.
It comprises a table or platform standing on legs, a fly wheel, a belt
pulley a spur pinion on the fly wheel shaft gearing into a spur wheel on a second
shaft which extends across the table and is carried in bearings upon the same.
This second shaft is near the opposite end provided with a flange and the extreme
end is screw threaded and provided with a nut and washer for clamping the disc to
be sharpened by cutting or otherwise bevelling its edge. The cutting or
sharpening tool is jointed like scizzors or the two parts fixed by a bolt and nut or
rivet. They may be brought the one against one edge and the other against the
other edge of the disc by means of a slide slotted to work at the side of the
platform over guide pins or bolts and capable of being moved backwards and
forwards from a hand lever a rocking shaft and a slotted rocking lever. The
cutting tools are moved to the right and left by means of a second hand lever
moving horizontally and guided by a bar fixed to the table. A friction roller
carried on an adjustable bracket is located to press against a side of the disc and
press it against the cutting tool.
Dated this 15th day of September 1893.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Disc Sharpening Machine.
I HEZEKIAH CASEY, Blacksmith, residing at Birmingham in the County of
Schuyler and State of Illinois, United States of America, 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 a sharpener for discs more particularly of the kind used
in harrows. The objects of the invention are firstly to provide a compact readily
worked machine whereby to cut at any desired bevel either or both sides of a
rotating disc at its peripheral edge which may be done without checking the
rotary motion of the disc; secondly to provide mechanism with knives or analogous
devices to be actuated by a single hand lever for cutting on the opposite sides the
rotating disc's edge at predetermined angles and in succession; and thirdly to
provide a compact disc sharpener capable of being wholly operated by the
attendant wherein the rotary motion of the disc is imparted with one hand whilst
the other is employed in applying a knife or other analogous device to the rotating
disc, or the rotary motion may be obtained by steam power or other suitable power
mechanism.
In the drawings

page_text: Fig. 2 a side elevation from the disc side and Fig. 3 a similar view from the
opposite side of the machine.
Fig. 4 is an end elevation.
A is a table or platform standing on legs B, B'. Ca fly wheel, D a belt pulley
and E a spur pinion all carried on shaft F mounted in a bearing a fixed on the
table A. G is a spur wheel engaged by pinion E and fixed on a shaft H which
turns in bearings a fixed on the table A and near the end opposite from wheel C
is provided with a flange I outside which the shaft is screw threaded for the
purpose of fixing the disc L by means of a screw nut K and washer . M is a
slide carrying a double lever the arms N, O, of which are connected by a cross
bar P pivotally attached as shewn in Fig. 1. Arm N is extended to form a
handle n². At the point where arms N, O, intersect they are attached to the
slide M by means of a nut m and bolt m¹ which latter serves as a fulcrum. The
short arms n, o of lever N, O, have fixed to them knives Q, R, by means of one or
more small bolts n', o'. The slide M has two slots m² through which are passed
and secured to the table A two guide bolts m³ the heads of these latter holding the
slide in position against the table. The reciprocating movements of the slotted
slide are imparted from a hand lever S with a handles through a rocking shaft s
carried in bearings s² fixed to the underside of the table. The rocking shaft at the
slide end is furnished with a slotted crank s³ the slot affording a sliding bearing for
a pin or bolt m projecting from the side of the slide. T is a disc gauge adjustable
upon the table A by means of a slot t and bolt the forked end of the gauge near
the disc carrying an iron roller 2 by which the edge of disc L is firmly pressed
against, and held as it comes to either of the adjustable knives Q, R. T¹ is a
guard bar bolted to the table A and beneath which the lever arm N works. The
knives Q, R, are made preferably of silver steel and are mounted so as to meet
the revolving disc at an angle of about 45° to the plane of the disc's rotation.
They cut or shave and do not scrape it. In some cases files or other tools having
hard rough abrading surfaces might be used instead of the knives.
The operation of the machine is as follows:-The workman takes hold of the
handles and through the rocking shaft s' and crank moves the slide M to
the desired position for holding the knives in readiness for application by the
double lever mechanism. The workman if relying on his own manual power to
work the machine, stands in front of it and grasps the handle c on flywheel C with
his right hand so as to rotate the tightly held disc I. He then applies the one or
the other of the knives to the rotating disc by working with his left hand the
handle n² either to the right or to the left according to which of the knives it is
desired to apply. Only one knife is applied at a time.
It is obvious that a belt may be applied to the pulley D and steam or other
motive power used to rotate the shafts and disc.
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
The general construction, arrangement and combination of parts constituting the
disc sharpening machine, substantially as described and shewn.
Dated this 14th day of June 1894.
THOMAS R. SHILLITO,
89, Chancery Lane, London, W.C., Agent for the Applicant.