Improvements in Tool-grinding Machines.
Year: 1891

page_text: ate of Application, 17th Aug., 1891-Accepted, 19th Sept., 1891
COMPLETE SPECIFICATION.
Improvements in Tool-grinding Machines.
We, CHAUNCEY WING, of Leonard Street, Greenfield, County of Franklin,
State of Massachusetts, Machinist, and HENRY CLAY AYER, of 1001 Hamilton
Street, Philadelphia, County of Philadelphia, State of Pennsylvania, United
States of America, Manufacturer, 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:-
Our invention relates to machines for grinding tools; and it consists in certain
novel features hereinafter fully set forth the object being to produce a simple,
cheap and effective device of this character.
The nature and operation of the improvement will be readily understood by all
conversant with such matters from the following explanation:
In the accompanying drawing,
Figure 1 is a side elevation of our improved grinding-machine;
Figure 2 is a vertical longitudinal section of the same;
Figure 3 is a front elevation, a portion of the cap being broken away to show a
water-duct; and
Figure 4 is a sectional elevation of the inner face of the cap.
Like letters and figures of reference indicate corresponding parts in the different
figures of the drawing.
A represents the body of the machine which consists primarily of a metallic
cylinder closed at its ends by heads, b d, and mounted on a base, B.
The top of the cylinder is removed forming a cover f.
The heads d are preferably formed integral with the body and are connected by
a horizontally arranged tube 9, which forms a box or bearing for the driving
shaft C. The said shaft is provided at one end with a fast pulley, and a loose
pulley i, and the grinding wheel D, is mounted on its opposite end. The wheel, D,
has its working face, j, bevelled or converged outwardly. Two vertical oil-ducts
or tubes, k are mounted in the tube g, and open under the cover f, the purpose of
the said tubes being to keep the journal lubricated when the body or tank, A, is
filled with water.
Water ducts, m p, open through the head 6 into the body A, respectively at each
side of the cover, f.
A cap or casing, H, is bolted to the head b, and the stone, D, works in the
mouth, q, thereof, the highest edge of the working-face j, being within the cap.
A trough r, is formed on the lower edge of the cap or casing and is extended
horizontally to form a table or rest t.
The cap is provided with grooves v, curved inwardly towards the tank (see
Figure 4) which register with the ducts m p, in the head b.
An annular rib or fin w, is formed on the inner face of the cap and between the
said rib or fin and the head, b, a disc or force wheel a, is secured to the shaft.
The said disc has a bevelled peripheral flange y, which rotates adjacent to the
grooves, v.
The body A, is provided in its bottom with a nipple z in which a vertical pipe 15,
projecting into the said body is secured.
The trough r, is provided near the table, t, with a duct 16, connected with the
hipple z, by a pipe 17. The mouth of the pipe 15, opens slightly above the
horizontal plane of the duct 16.
In the use of our improvement, the tank A, is filled with water.
Its level being

page_text: higher than the duct 16, the water is syphoned from the tank into the trough, r,
and projected against the outer face of the wheel.
The shaft being in motion, the stone D, rotates and is employed for grinding in
the usual manner.
The rough surface of 'the stone causes the water received
from the duct 16, to cling thereto until sufficient centrifugal force is imparted by
the rotary motion of the stone to cause it to flow. The face of the stone being
bevelled, as described, the tendency of the water is to seek the highest point of its
diameter, capillary attraction retaining it in contact with the surface of the stone
until overcome by the centrifugal force which causes it to fly from the highest edge
of the face, j, into the trough and cap. The trough being inclined as shown the
water is directed into contact with the force wheel c, which imparts a rotary move-
ment thereto causing it to travel on the inner face of the said cap into the curved
grooves or water-ducts v, and thence through the ducts m p, into the tank. A
continuous circulation of water is thus created between the tank and trough, and
clear water is constantly delivered against the stone from the duct 16, the sediment
or refuse from the stone and tools being collected in the bottom of the tank.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
First. In a grinding-machine, the combination of a tank; a grinding-wheel
mounted on a rotary shaft and provided with an outwardly bevelled working-face;
a hollow cap partially enclosing said wheel and connected by ducts with said tank;
and a pipe connecting the tank and cap, substantially as described.
Second. In a device of the character described, a rotary grinding-wheel mounted
to work in a trough connected by a pipe with a water-supply, the said wheel being
provided with a bevelled edge a cap or guard partially encircling the said wheel
whereby moisture centrifugally discharged therefrom may be directed into ducts
leading to the said supply, substantially as and for the purpose specified.
Third. In a device of the character described, a rotary grinding-wheel mounted
to work in a trough and provided with a bevelled edge in combination with a
supply tank connected with the trough by pipes and supply ducts; and a force
wheel mounted on the journal of the said grinding-wheel, substantially as
described.
Fourth. In a device of the character described, the combination of a supply
tank; a shaft journalled therein and bearing a bevelled grinding-wheel; a cap
connected by ducts with the tank and partially enclosing the said wheel; a pipe
connecting a trough on the tank with the supply; and a bevelled disc or force-
wheel mounted on the shaft between the grinder and the tank, substantially as
described.
Fifth. In a device of the character described, the combination of a supply-tank ;
a shaft journalled therein and bearing a bevelled grinding-wheel without the tank ;
a cap encircling the said wheel and provided with a trough; a pipe connecting the
trough and tank; ducts connecting the cap and tank; an annular fin in the said
cap; and a bevelled disc or force wheel mounted on the said shaft between the
said fin and the tank ducts, substantially as described.
Sixth. The tank, shaft and bevelled grinder in combination with the cap, N,
provided with a trough as r, and secured to the tank-head; a pipe connecting the
trough and tank; a duct, m, connecting the upper portion of the cap and tank;
and a bevelled force wheel, as a, mounted between the grinder and tank-head,
substantially as described.
Seventh. In a grinding-machine a rotary grinding wheel having a bevelled
working face; a cap or casing therefor connected by supply and discharge ducts
with a water supply; a force wheel so arranged that moisture centrifugally
discharged from the grinding wheel will be conducted to the supply by the said

page_text: discharge ducts and a continuous circulation set up between the said supply and
casing, substantially as described.
Dated this 17th day of August 1891
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.