Improvements in Apparatus for Making Certain Articles of Pottery Ware, such as Electric Lamp Roses, Switches, Fuse Blocks, and the like.
Year: 1889

page_text: Date of Application, 13th May, 1889
Complete Specification Left, 4th Oct., 1889-Accepted,: 9th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Making Certain Articles of Pottery
Ware, such as Electric Lamp Roses, Switches, Fuse Blocks, and
the like.
RICHARD THOMAS GROCOTT, Whitehall Works, Longport, in the County of
Stafford, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in apparatus for making certain articles of
pottery ware such as electric lamp roses, switches, fuse blocks, and parts of such like
articles which are formed of pottery ware; and my said invention relates more
particularly to the method of forming the screw threads upon said articles.
My invention consists in making a die which will forui the article, pierce it with
the required holes, and form a screw thread upon it at one operation. Said die is
constructed of iron or other suitable material and consists of a base from which
extends a suitable hollow. boss with the top closed. This boss is screwed on the
outside and its diameter is equal to the diameter of the screwed part of the article to
be made. On the outside of this boss I fit a ring screwed to, fit said boss, so that
when said ring is turned round it will move up and down the boss according to the
direction it is turned. The outside of this screwed ring is made of a diameter equal
to the diameter of the flange or large part of the article to, be made in the die. On
the outside of said screwed ring I fit another deeper ring provided with two handles
which pass through the thickness of the material and project in slot holes in the
screwed ring. These handles are for turning both rings round together and permit
one to slide over the other a certain distance. This die is intended to be used in the
ordinary press; the part for forming the inside of the article is made of the required
shape and fitted with pegs to form the holes required in the articles. When the press
is brought down, these pegs fit into corresponding holes formed in the top. or. closed
part of the boss.
רוי
BILLINGTON & NEWTON,
Potteries Patent Agency, Longport, Staff., Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Making Certain Articles of Pottery
Ware, such, as Electric Lamp Roses, Switches, Fuse Blocks, and
the like.
RICHARD THOMAS GROCOTT,.,Whitehall Works, Longport in the County of
Stafford, 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 :-
My invention relates to improvements in apparatus for making certain articles of
pottery ware, such as electric lamp roses, switches, fuse blocks, and parts of such like
articles which are formed of pottery ware; and my said invention relates more
particularly to the method of forming the screw threads upon said articles.
My invention consists in making a die which will form the article, pierce it with
the required number of holes, and form a screw thread upon it at one operation.
Said die is constructed of iron or other suitable material, and consists of a base
from which extends a suitable hollow boss with the top closed. This boss is screwed
on its outside, and its diameter is equal to the diameter of the screwed part of

page_text: the article to be made. On the outside of this boss I fit a ring screwed to fit said
boss, so that when said ring is turned round it will move up and down the boss,
according to the direction in which it is turned. The outside of this screwed ring
is made of a diameter equal to the diameter of the large part of the article to be
made. On the outside of said screwed ring I fit another deeper ring provided
with two handles which pass through the thickness of the material and project into
slots or grooves in the screwed ring. These handles are for turning both rings
round together and permit one to slide over the other a certain distance.
My invention will be more readily understood by referring to the annexed
drawings, which illustrate a die constructed accordingly. I will now proceed to
describe same having reference to the letters and figures marked thereon. Fig. 1
is a side view, Fig. 2 a vertical section, Fig. 3 a plan, and Figs. 4 and 5 shew
sectional elevation and plan, respectively of an electric ceiling rose. a is the base,
and the hollow boss, with closed end, extending from same, and screwed on its
exterior. c is the ring screwed to fit hollow boss b, its exterior having two slots
or grooves d, d, opposite each other. f is the outer ring which slides over the
screwed ring when required by means of handles 9, 9. The screwed part of said
handles project through ring f into the slots or grooves in screwed ring
which
arrangement permits one ring to slide over the other vertically, but insures both
turning round together. h, i, j and are pins for forming holes in the article.
Z is the top die which is screwed or otherwise fastened to the moving head of the
press, said top die being provided with corresponding holes to allow the pins in the
bottom die to pass through. m is a sliding piece which fits under outer ring to
keep it in its proper position, n is a handle or knob to slide same by. p is a sliding
block to which are attached the pins for forming holes in the central part of the article,
said sliding block is attached to a lever worked by the operators foot in a manner
commonly known.
The mode of operating my invention is as follows:-In the drawings the die is
shown in the position of making the lower part of an electric ceiling rose, O Fig. 4.
The top die is secured to the moving head of a suitable press, such as those
generally used by potters, and the lower part of the die is placed underneath, being
carefully set, so that when the top die is brought down it will slide inside ring f.
Assuming the top die to be lifted up, I fill the space enclosed by ring with dust,
but level with the face of said ring to allow for compression. I then start the press
and at the same time, place my foot upon the lever which raises *block with the
pins attached so as to form the holes in the central part. The top die having come
down and pressed the dust into a compact mass, shown by thick and thin shade
lines Fig. 2, filling every crevice of the die, it will be seen that the article is
complete with screw threads and the required holes through it at one operation.
The next operation is to remove said article, which is very friable, without injuring
the small helical projections forming the screw thread and also without breaking
or cracking it round the holes. This I do as follows:-I first unscrew the press to
remove top die 1, and remove my foot off the lever attached to block p so as to
allow the pins to come level with the top of the boss, out of the way. I then
remove sliding piece m from under ring f, turn said ring round once or twice by
handles 99, so as to raise ring c which turns with it. I then slide ring down so
that I can take hold of the outer edge 4 of the article and unscrew it out of the
die, when it is then ready to be fired.
In making the top part of an electric ceiling rose, Fig. 4, the screwed ring c
is brought lower down boss b, so that a female thread will be formed upon the
article, and a top die of suitable shape is used.
I have described my invention and illustrated it, as constructed for making electric
ceiling roses, but it is obvious that it may be easily modified for making other
similar articles particularly where a screw thread is required. When plastic clay
is used to make the articles, it is necessary to first make blanks near to the size,
the blanks are then placed in the die and manipulated in a similar manner to dust.

page_text: 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 what 1
claim is,
1. The method of forming screw threads upon certain articles of pottery ware,
by means of a die consisting principally of a screwed ring fitting on a screwed
projecting boss, with outer ring and top die, constructed substantially as herein set
forth and shown.
2. A die for making electric lamp roses, switches, fuse blocks, and similar articles
of pottery ware, and parts of such like articles made of pottery ware, constructed
substantially as herein described and illustrated by the accompanying drawings.
Dated thig 3rd day of October 1980
BILLINGTON & NEWTON,
Potteries Patent Agency, Longport, Agents for Applicant.
BILLINGTON & NEWTON,
Potteries Patent Agency, Longport, Agents for Applicant.