Apparatus for Grinding Plugs of Stoneware, Glass, and other suoh Hard Substances to an Accurate Taper.
Year: 1895

page_text: Date of Application, 11th Nov., 1895
Complete Specification Left, 11th Aug., 1898-Accepted, 17th' Oot., 1896
PROVISIONAL SPECIFICATION.
Apparatus for Grinding Plugs of Stoneware, Glass, and other suoh
Hard Substances to an Accurate Taper.
CHARLES HENRY CLIFFORD Rudd Thistle Chemical Plant Works St. Anthonys
Newcastle-on-Tyne Chemical Plant Maker do hereby declare the nature of this
invention to be as follows:-
:―
The grinding of stoneware, glass and other such hard substances plugs.has
always been a difficulty experienced by those having to deal with such work.
Owing to their having to undergo a process of thorough annealing whilst being
made by the potter the plugs become twisted and more or less out of their original
correct shape thus they are rendered quite unfit for fixing into a tap, valve or other
intended receptable. Hitherto the mode of grinding has been by holding with the
hand the plug against a rotating sand or emery stone or wheel to grind off the
roughest parts and then making a hollow chuck specially made with taper to suit
that of plug to make plug smooth therein the receiving part of the tap valve or
other receptable likewise had to be made with taper same as the plug thus
prepared the result being that no plug would fit a tap. valve or other receptable
other than the one which had been made specially for it, and when a plug became
broken the whole tap or valve was rendered entirely useless and had to be replaced
by an entirely new one complete.
My invention has been devised to overcome the aforementioned difficulties and.
drawbacks. The arrangement consists, of an emery or other suitable material
wheel which is affixed to the slide rest of a machine by means of a bracket thereto
attached, the spindle of emery wheel also having a pulley on it. On overhead gear
spindle of machine a roller or broad pulley is fixed, a driving belt or band is put
on to roller or broad pulley and the small pulley on emery wheel spindle. The plug.
to be ground is fixed between centres of machine heads by means of a holder or
chuck made in form of an oblong box, and female centre, the box or chuck
having at each of its sides centring, screws, the box receives T head of plug and
female back centre takes bottom end of plug. The plug and grinding, wheel
rotating by means of the overhead gear and driving belts on their respective
pulleys and being put into contact with each other in opposite directions the plug
is thereby ground; the slide rest being set to any required angle ensures a uniform
taper and size to any number of plugs.
Dated this Sixth day of November 1895.
CHARLES HENRY 'CLIFFORD RUDD.
COMPLETE SPECIFICATION.
Apparatus for Grinding Plugs of Stoneware, Glass, and other such
Hard Substances to an Acourate Taper.
CHARLES HENRY CLIFFORD RUDD Thistle Chemical Plant Works St. Anthonys
Newcastle-on-Tyne and of 13-15 Walker Road Newcastle-on-Tyne Chemical Plant
Maker 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 :-
The grinding of stoneware glass and other such hard substances plugs has

page_text: always been a difficulty experienced by those. having to deal with such work.
Owing to the plugs whilst being made by the potter having to undergo a process of
thorough annealing they become twisted and more or less out of their original
shape thus rendering them quite unfit for fitting into a cock or tap, valve or other
intended receptable. Hitherto the mode of grinding has been by holding with the
hand the plug or stopper against a rotating sand or emery stone or wheel to grind,
off the rougliest parts and then making a hollow chuck specially in accordance with
the taper of plug to be ground therein, the receiving part of the tap, valve, bottle
or other receptable likewise had to be made in accordance with taper of the plug,
the result being that when a plug or stopper got broken no other plug could be.
fitted in its place and the tap, valve, bottle or other article had to be wholly
condemned and an entirely new article had to be put into its place.
My invention has been devised to overcome the aforementioned drawbacks and
difficulties.
My arrangement is shewn on the accompanying drawings consists of an emery or
other suitable materials wheel or stone A which is affixed to the slide rest a of a
machine by means of a bracket B thereto attached, the spindle C of emery wheel A
having also a pulley D on it; on overhead gear spindle 6 of machine a broad
pulley E is fixed. A driving belt or band F is put on to the broad pulley E' before
referred to and on the small pulley D of emery wheel A. The plug G to be ground.
is fixed between the centres of machine by meaus of a holder or chuck H made in
the form of an oblong box, and female back centre I. The holder or oblong box
shaped chuck H receives T head of the plug G and the female back_ceutro takes
bottom end of the plug, G. The holder or oblong box shaped chuck E is provided
with centring screws J fitted through each of its four sides by means of which the
plug G is accurately centred into.its position for grinding. The plug G & emery
or other suitable materials grinding wheel A rotating by means of the overhead
gear and driving belts or bands on their respective pulleys c. d. E. D. and being put
into contact with each other the plug G is thereby ground. The slide rest a being
set to the required angle ensures a uniform taper to any number of plugs.
Having now particularly described and ascertained the nature of my said inven-
tion and in wliat manner the same is to be performed, I declare that what I
claim is
Making employing and asing apparatus for and grinding stoneware and other
such like hard substances plugs or stoppers to any required accurate taper after the
manner herein described & with reference to the accompanying drawings.
Dated this 10th day of August 1896.
CHARLES HENRY CLIFFORD RUDD.