Improvements in Means or Apparatus for Making Articles of China and Earthenware having Screw Threads.
Year: 1893

page_text: Date of Application, 25th May, 1893
Complete Specification Left, 26th Feb., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Means or Apparatus for Making Articles of China
and Earthenware having Screw Threads.
I, HENRY WATKIN of 24 Price Street, Burslem in the County of Stafford,
Pottery Manufacturer, do hereby declare the nature of this invention to be as
follows:-
-
The object of the present invention is to produce articles of china and earthenware
having a screw thread in a simple and inexpensive manner.
The apparatus consists of a vertical pillar which carries an arm capable of being
moved around said pillar. This moving arm is provided with a male or female
screw at its outer end, according to the article to be produced. Below the male or
female screw and in a line with it, is fixed a vertical screw around which turns the
carrier for the mould which forms the outside of the articles. The mould is held in
the carrier by any suitable means. The outside form is given to the clay by
working it when moist in a plaster mould by the method technically known as
"jollying."
"
The mode of operation is as follows:-The arm carrying the male or female
screw is turned round its axis to enable the said plaster mould containing the article
to be placed in the carrier. The said screw is then turned into position above the
mould and the mould carrier is turned upon the fixed vertical screw, which is made
of the same pitch as the first named male or female screw. The mould being
carried up and around the male or female screw, this latter forms the required
thread in or upon the article being manufactured. The mould carrier is then
turned in the opposite direction and thereby causes the mould and article therein to
be carried in a downward direction. The mould with the article therein is taken
from the mould carrier and dried.
The article is subsequently removed from the mould and is finished by fettling
in the ordinary manner.
This method ensures more accurate results than the older method of turning and
has the additional advantage of reducing the cost of manufacture.
Dated May 25th 1893.
HENRY
By Harris & Mills,
WATKINS,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Means or Apparatus for Making Articles of China
and Earthenware having Screw Threads.
I, HENRY WATKIN, of 24 Price Street, Burslem, in the County of Stafford,
Pottery 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 :-
The object of the present invention is to produce articles of china and earthen-
wire having a screw thread in a simple and inexpensive manner.
My invention is illustrated in the accompanying drawings, in which :-
Fig. 1 is an elevation, Fig. 2 is a sectional elevation and Fig. 3 is a plan, of my
improved apparatus, and Fig. 4 is an end view of the thread forming screw.
lיסמן

page_text: The apparatus consists of a vertical pillar a fixed to an arm or base a¹ mounted
on a suitable bench or other convenient support.
This pillar a carries an arm b capable of being moved around said pillar a, the
boss of said arm b being mounted between collars cc capable of being fixed at any
desired height on the pillar a by the set screw c'.
-
This moving arm is provided with a male or female screw d fixed by a set
screw dat its outer end, according to the article to be produced.
Below the male or female screw d, and in a line with it, is mounted a vertical
screw e forming the axis of the carrier f for the mould g which forms the outside
of the articles.
The mould is held in the carrier by any suitable means, its own friction being
in most cases sufficient.
The outside form is given to the clay by working it when moist in a plaster
mould g by the method technically known as "jollying."
The screw e works in a fixed female screw a² carried by the arm or base a¹,
and the carrier f consists of a grooved wheel, around which passes a driving
bandh driven from any suitable power.
The mould g is seated in a tapered ring 'removably placed in a similar ring
fixed to the body of the wheel f.
The ring may in some cases be dispensed with, or a larger or smaller one
may be used according to requirements.
The lower end of the screw d is formed with cutting edges d to facilitate its
action.
The collars c c are connected together by a bar which is provided with a
set screw c³ forming a stop against which the arm is placed to bring the screw d
in proper position above the article to be screw-threaded.
The mode of operation with my improved apparatus is a follows:
The arm b carrying the male or female screw d is turned round its axis a, as
shown by dotted lines in Figs. 1 and 3, to enable the said plaster mould con-
taining the article to be placed in the carrier f. The said arm is then turned
into the position shown by the full lines with the screw d above the mould y
The mould carrier
and is temporarily fixed in such position by the set screw '.
is then turned with the fixed vertical screw e, which latter is made of the same
pitch as the first named male or female screw d. The mould being carried up
and around the male or female screw d, this latter forms the required thread
in or upon the article being manufactured. The mould carrier f is then turned
in the opposite direction and thereby causes the mould and article therein to
be carried in a downward direction. The mould g with the article x therein is
taken from the mould carrier and dried. The article is subsequently removed
from the mould 9 and is finished by fettling in the ordinary manner.
The method herein described ensures more accurate results than the older
method of turning and has the additional advantage of reducing the cost of
manufacture.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
The peculiar combination and arrangement of apparatus substantially as herein
shown and described and for the purpose stated.
10th 1 of Wahmuar 1904
H.
WATKIN,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.