Improvements in Apparatus for Moulding the Bodies of Electric Switches, Bell Pushes, Ceiling Roses, and other like Articles in China and Earthenware.
Year: 1893

page_text: Date of Applicat on, 14th Mar., 1993
Complete Specification Left, 14th Dec., 1893-Accepted, 3rd Feb., 18y4
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Moulding the Bodies of Electric
Switches, Bell Pushes, Ceiling Roses, and other like Articles in
China and Earthenware.
1, HENRY WATKIN, of 24, Price Street, Burslem in the County of Stafford,
Manager, do hereby declare the nature of this invention to be as follows:-
The invention relates to an improved construction and arrangement of apparatus
in the form of upper and lower dies for the moulding of the bodies of electric
switches, bell pushes, ceiling roses and the like in china or earthenware and the
simultaneous forming of the holes, recesses and screw threads in such articles.
The lower die has a fixed base block provided with a short central cylindrical
projection in which are fixed the required number of vertical pins to form the
holes in the article to be moulded, guide pins to pass through corresponding holes
in a loose removable die piece a central, square or other shaped block to fit a
corresponding hole in the removable die piece, holes through which lifting rods
are passed to lift the removable die piece, a loose ring or short tube fitting
the short central cylindrical projection and forming the periphery of the mould and
the removable die piece which accurately fits the said loose ring or short tube.
The removable die piece is formed of a disc and a ring firmly fixed together,
the disc has the before mentioned square or other shaped hole formed therein as
also holes for the before mentioned pins to pass through and the ring has formed
therein a screw thread to form the screw thread on the required part of the article
being moulded. This removable die piece forms the bottom surface of the lower
die. The holes for the guide pins are formed through both parts of this removable
die piece.
The upper die forms the upper side of the article being moulded and it has
short tubes to fit some or all of the hole forming pins of the lower die so as to
form recesses in the article around the holes formed therein.
The lower die is preferably formed with a conical edge on to which the upper
die presses and thereby separates the excess clay or body whether in form of dust
or clay from that in the dies.
The operation is as follows:-The lower die has the removable die piece placed
in its proper position therein, a quantity of clay or body is placed in the lower
die above the said removable die piece, the upper die is then caused to descend
until it presses on the conical edge of the lower die, said upper die is then raised
and a treadle or lever is operated to raise the lifters which latter raise the
removable die piece out of the lower die, when the article moulded is removed,
from the removable die piece by unscrewing it therefrom.
It will be evident that the contour of the article to be moulded may be varied
as required by making the dies of corresponding form. The number and position
of the holes and of the recesses may be varied as required in like manner.
Dated March 14th 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Moulding the Bodies of Electric
Switches, Bell Pushes, Ceiling Roses, and other like Articles in
China and Earthenware.
I, HENRY WATKIN, of 24 Price Street Burslem, in the County of Stafford,
Manager, 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 invention relates to an improved construction and arrangement of apparatus
in the form of upper and lower dies for the moulding of the bodies of electric
switches, bell pushes, ceiling roses and the like in china or earthenware and the
simultaneous forming of the holes, recesses and screw threads in such articles.
My invention is illustrated in the accompanying drawings in which
Figure 1 is an elevation partly in section showing the upper and lower dies.
Figure 2 is a sectional plan drawn on the line 1. 1 of Figure 1.
Figure 3 is a plan of the lower die without the removable die piece.
Figure 4 is a sectional elevation of the lower die showing the lifter raised and
without the removable die piece.
Figure 5 is an underside view of the upper die.
Figure 6 is a cross section on the line 2. 2 of Figure 7 which latter is a plan of
the removable die piece separately.
Figure 8 is a vertical section of an upper and lower die in the act of moulding,
showing a modification and
"
Figures 9, 10 and 11 are respectively a front elevation, an edge view and a back
elevation of a cut-out body as-moulded by the dies shown at Figures 1 to 7.
In all the figures like parts are indicated by similar letters of reference.
A is the upper die, and B is the lower die.
The lower die B has a fixed base block b provided with a short central cylindrical
projection in which are fixed the required number of vertical pins 6' to form the
holes in the article to be moulded, guide pins to pass through corresponding
holes in a loose removable die piece b, a central cylindrical, square or other
shaped block or stud 6 to fit a corresponding hole in the removable die piece b,
holes through which lifting rods are passed to lift the removable die piece 64,
a loose ring or short tube 610 fitting the short central cylindrical projection 6' and
forming the periphery of the mould and the removable die piece which accurately
fits the said loose ring or short tube.
The removable die piece is, for convenience of manufacture formed of a disc and
a ring firmly fixed together, the disc has the before mentioned cylindrical square or
other shaped hole b' formed therein as also holes 611 for the before mentioned pins 62
to pass through and the ring has formed therein a screw thread 6" to forin the screw
thread on the required part of the article being moulded. This removable..die
piece forms the bottom surface of the lower die. The holes for the guide pins
may be formed through both parts of this removable die piece but it is preferable
to make them only in the bottom thereof as shown in the drawings. The upper
die A forms the upper side of the article as it is being moulded and it may some-
times have short tubes a as shown at Figure 8 to fit some or all of the hole
forming pins 6 of the lower die B so as to form recesses in the article around the
holes formed therein.
In Figures 1 and 5 the face of the upper die A is formed with transverse ribs a¹, a³
and with pins a' projecting downwards from the inner ends of the ribs a² to form
corresponding recesses c' and holes c³ in the back of the "cut-out" body c to receive
the conducting wires. The " cut-out body has also recesses c c formed therein
by the pins b³, a central countersunk hole c to receive a fixing screw or nail and
a screw thread c to receive the cover.
"

page_text: The lower die B is preferably formed with a conical upper edge on to which the
upper die presses and thereby separates the excess clay or body, whether in form of
dust or clay from that in the dies.
The operation is as follows:-The lower die B has the removable die piece 64
placed in its proper position therein, a quantity of clay or body in the form of dust
or clay is placed in the lower die above the said removable die piece, the upper
die A is then caused to descend until it presses on the conical edge of the lower
die B, said upper die A is then raised and a treadle or lever is operated to raise the
lifters which latter raise the removable die piece * out of the lower die B, when
the article moulded is removed, from the removable die piece by unscrewing it
therefrom.
It will be evident that the contour of the article to be moulded may be varied as
required by making the dies of corresponding form. The number and position of
the holes and of the recesses may be varied as required in like manner.
By the herein described method of manufacture articles can be made much more
accurately than by the older method of " throwing," turning and cutting, and they
can be produced cheaper whilst by using a loose die piece I am enabled to turn
out with a single screw press and a number of duplicates of the loose die as many
articles as could be made from several presses provided with fixed bottoms to the
lower die.
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 I am aware
that it has been previously proposed to construct dies with a removable bottom or
die piece having the screw thread formed therein and I lay no claim to such
construction, but what I claim is :-
:-
1. The peculiar combinations and arrangements of parts forming upper and lower
dies for moulding the bodies of electric switches, bell pushes, ceiling roses and other
like articles in china and earthenware.
Dated December 14th 1893.
HENRY WATKIN,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.