AN IMPROVEMENT IN LATHES FOR DENTAL AND OTHER USES
Year: 1879

page_text: LETTERS PATENT to George Horatio Jones, of No. 57, Great Russell Street,
Bloomsbury, in the County of Middlesex, Surgeon Dentist, for the Invention
of "AN IMPROVEMENT IN LATHES FOR DENTAL AND OTHER USES."
PROVISIONAL SPECIFICATION left by the said George Horatio Jones at the
Office of the Commissioners of Patents on the 18th April 1879.
GEORGE HORATIO JONES, of No. 57, Great Russell Street, Bloomsbury, in the
County of Middlesex, Surgeon Dentist. AN IMPROVEMENT IN LATHES FOR
DENTAL AND OTHER USES."
"
The object of the Invention is to save particles of the precious metals usually
wasted in the process of grinding, and also to keep a constant and effectual supply
of water on the grinding wheel while being used.
The improvement consists essentially of a tank and pump in connection with the
ordinary lathe, one form of which I give in the Drawing herewith. The pump is
worked by one eccentric movement in connection with the driving wheel of the lathe,
and is thus worked simultaneously. The water is pumped from the top of the tank
and brought in a tube immediately over the grinding wheel on to a sponge or other
porous material touching the grinding wheel. The water then passes over the
wheel into the trough, from which it removes with it all the usually wasted results
of grinding, which is carried away by a pipe to the tank before mentioned, here
a deposit will be formed of the minute particles of the metal, etc., which may be
easily drawn off from the bottom and submitted to the usual process of
refining sta

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Horatio Jones in the Great Seal Patent Office on the 17th
October 1879.
GEORGE HORATIO JONES, of 57; Gt. Russell Street, Bloomsbury, in the County
of Middlesex, Surgeon Dentist.. "AN. IMPROVEMENT IN. LATHES FOR DENTAL AND
OTHER USES."
This Invention has for its object, improvements in lathes, employed in dentistry
and other similar purposes, whereby the small particles of the precious metals, such
as gold & platinum, which are now usually wasted in the operation of grinding
are preserved, at the same time that a constant and sufficient supply of water is
ensured on the grinding stone when the same is in use.
And in order that my said Invention may be better understood and readily
carried into effect I will now, with the aid of the accompying, which shows a
view in front elevation of a dentist's lathe with my improved mechanical arrange-
ment adapted thereto, proceed more particularly to describe and. ascertain the
same.
In order to effect the objects above mentioned I.affix. to one side of the lathe-in
any convenient position a tank B, of any suitable form and dimensions, the bottom
whereof is of an oval or conical shape and is provided in its centre with a con-
venient orifice, which is closed by means of a screw nut D. I then fix a small force
pump A on suitable bearings a, placed about midway in the frame of the lathe,
which pump is actuated by means of a shaft wheel and eccentric in connection with
the driving wheel of the lathe, as shewn at C in the accompanying. Drawing.;
attached to the base of the pump is a suitable supply pipe E which is connected
with the tank B, and which supply pipe serves to feed the force pump with water
from the tank; in order to conduct such water to the grindstone a second supply
pipe F is attached to the side of the force pump, which extends, upwards and
terminates in a curve immediately over the grinding, wheel. When the driving
wheel of the lathe is set in motion by the treadle the water is pumped out from
the top of the tank through the supply pipe E; and conducted through the tube F
from the curved extremity of which it drops on to a sponge or other suitable porous
material, so arranged as to touch the grinding wheel and through which the water
passes over the grinding wheel and thence falls into the trough G, connected with
which is a suitable outlet pipe H passing into the tank B, and extending nearly to
the bottom of same, as shewn in the Drawing, as the water so passes into the
trough G, and discharges itself through the outlet H into the tank B, it carries
with it all the minute particles of the precious metals which become detached in
the process of grinding and which have hitherto been wasted and deposits them as
a residium in the bottom of the tank, and when a sufficient accumulation of such
particles has taken place the screw nut D is removed and they are washed down
the conical or oval sides of the base of the tank and received into a suitable vessel,
whence they are removed and submitted to the ordinary process of refining and
otherwise treated so as to render them fit for reutilisation. I form the base of the
tank of an oval or conical shape in order to insure all the particles of the precious
metals escaping therefrom when the screw, nut D is removed. It will be observed
that the supply pipe E extends nearly to the top of the tank which is kept filled.
with water, to the dotted line I, whereby. I ensure, the, water at the bottom of the,
tank remaining unagitated, and so allowing the minute particles of metal to preci-.
pitate themselves to the bottom instead of being held in suspension by the agitation
of the water. It is also obvious that by my improved arrangement of mechanism
a constant and sufficient supply of water is ensured to the grindstone. My
improved mechanical arrangement, as herein before described, may be adapted with
advantage to jewellers' and other lathes used for grinding precious metals and
materials as well as to those employed by dentists.

page_text: Having thus particularly described and ascertained the nature of my said Inven-
tion, and the manner of carrying the same into operation, I would have it under-
stood that what I claim is the combination and arrangement of the various parts
respectively lettered A, B, C, D, E, F, G, and H, substantially in the manner and for
the purposes hereinbefore described and illustrated. Secondly. I also claim the
adaptation of my improved mechanical arrangement to jewellers' and other lathes
used for the purposes of operating on precious metals and materials.
In witness whereof, I, the said George Horatio Jones, have hereunto set my
hand and seal, this Fourteenth day of October, in the year of our Lord One
thousand eight hundred and seventy nine.
GEO. H. JONES. (LS.)