Improvements in the Manufacture of Terra-cotta Chimney Tops, Windguards, Louvres, Sewer Bends, and similar Articles.
Year: 1893

page_text: Date of Application, 10th Nov., 1893
Complete Specification Left, 10th Aug., 1894-Accepted, 15th Sept., 1894
Improvements in the Manufacture of Terra-cotta Chimney Tops,
Windguards, Louvres, Sewer Bends, and similar Articles.
We JOSEPH SHERRATT, of Hill House, Stockingford, Nuneaton, Foreman of
Works, and ISAAC SHERRATT, of Clarance Street, Nuneaton, Modeller, and
JERRY SHERRATT, of Hill House, Stockingford, Nuneaton, Terra-cotta Presser,
all in the County of Warwick, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in the manufacture of terra-cotta
chimney pots, windguards, louvres, sewer bends, and similar articles, and consists
of the apparatus and method hereinafter described. Essentially it consists in the
employment of a removable core upon which is placed a layer or cover of clay,
in combination with removable part moulds (such part moulds forming as a whole
the complete mould) which are forcibly pressed upon the layer of clay and thus
forming the article required, the said core being then removed, followed by the
removal of the moulds, after the manner hereinafter stated.
In a suitable base plate we form a central opening to receive what we may term
variously sized collar plates. These plates may be dovetailed, or formed with a
flange, or otherwise, and secured in the said base in any convenient manner so that
the upper surface of the collar and the top of the base are level with each other,
when secured in position. The hole in any of such collars corresponds to the
diameter of the base of the core of the chimney. We now prepare a core of
suitable material, of metal, wood &c., which is passed upwards from beneath, and
which agrees in height (length), shape and size to the desired interior of the
chimney. To the lower end of this core suitable mechanism is arranged by which
at will it may be withdrawn (downwards).
We further prepare the mould for the exterior of the article, which is usually
divided into two parts for ordinarily shaped pots, but which may vary both in
number and shape and construction to suit any peculiarity in the shape of the
exterior of the article to be made. These mould parts are now provided with
suitable base parts, that they may slide to and from the central core. To the rear
side of these moulds is now connected operating mechanism by which they may be
made to advance with the necessary force, or receded at pleasure. This may be
done by hydraulic apparatus, or by screws with hand wheels or other suitable
device.
The process of manufacture is briefly thus:-The core is placed in position, a
suitable thickness or layer of clay is placed around the said core; the part moulds
are then forced home upon the clay, which is thus pressed into the various parts or
shapes of the moulds, suitable outlets being made to permit of the exit of surplus
clay. The moulding having thus taken place the core is withdrawn downwards
through the collar plate, then the mould parts are withdrawn leaving the now
stiffly formed article ready for removal for further finishing operations.
Instead of thus moulding them vertically we may if desired arrange such core
and moulds in a horizontal or angular manner, and modify the pressing, and the
core withdrawing mechanism to suit.
Dated this 9th day of November 1893.
CHARLES T. POWELL,
Applicants' Agent.

page_text: Improvements in the Manufacture of Terra-cotta Chimney Tops,
Windguards, Louvres, Sewer Bends, and similar Articles.
We JOSEPH SHERRATT, of Hill House, Stockingford, Nuneaton, Foreman of
Works, and ISAAC SHERRATT of Clarance Street Nuneaton, Modeller, and
JERRY SHERRATT, of Hill House, Stockingford, Nuneaton, Terra-cotta Presser,
all in the County of Warwick, 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:-
This invention relates to improvements in the manufacture of terra-cotta
chimney pots, windguards, louvres, sewer bends, and similar articles, and consists
of the apparatus and method hereinafter described. Essentially it consists in the
employment of a removable core upon which is placed a layer or cover of clay,
in combination with removable part moulds (such part moulds forming as a whole
the complete mould) which are forcibly pressed upon the layer of clay and thus
forming the article required, the said core being then removed, followed by the
removal of the moulds, after the manner hereinafter stated.
In order to more clearly explain this our invention, we have appended hereunto
an illustrative sheet of drawings upon which are figures and numbers of reference,
similar numbers referring throughout the several views to the same thing or part.
Fig. 1, is a front view of the exterior moulds as arranged in a screw press.
Fig. 2, is a side and Fig. 3, a plan view of the same.
Fig. 4, is a detached plan view of the one half mould.
Fig. 5, is a sectional view of the core.
Fig. 6, is a part sectional view of a pipe after it has been pressed.
Fig. 7, shows a plan view of one half of an exterior mould arranged for a bend.
Fig. 8, shews in elevation the two parts of the said bend mould.
Fig. 9, is a view of the bend core.
Fig. 10, is a sectional view of the bend when pressed.
We find it advantageous to arrange the moulds and core in a horizontal position
and therefore we have illustrated it in that manner.
15, is a table or frame suitably arranged to receive the columnar supports 16, 16,
which carry the crosshead 17. In this crosshead is fixed a screw nut (not seen)
through which the screw 18, works, so that by means of the hand wheel 19, the
attachment plate 20, and with it the top mould 21, may be raised or forced down
with considerable pressure. 22, is a slide sleeve which is bolted to the crosshead,
and in which slides the plunger 23, the said plunger having a longitudinal but
non-rotative motion, being connected at its upper end to the lower end of the
screw 18. To the attachment plate 20, is bolted the upper half of the mould 21.
Upon the table 15, are placed slideways 24, 24, between which may slide the
plate 25, to which latter is secured the lower half mould 26. The plate 25, may
be slid into or out of position by the handle 27, a suitable stop such as 28,
determining its position. Extending from the table are two arms 29, 29, having
pivots 30, 30, and upon the underside of the plate 25, are corresponding projections
or journals 31, 31, so that when the plate is slid outwards, as shown in dotted lines
in Fig. 2, it may be tilted down, so as to facilitate the removal of the core and
moulded pipe &c.
The interior of the moulds 21 and 26, correspond to the external contour of the
desired pipe &c.
In Fig. 5, we have shown a core prepared for the moulds 21 and 26, in which 32,
is the body where shape corresponds to the interior of the pipe &c. to be moulded.
This may be built up in various ways to suit the particular pipe &c. to be moulded.
In this case, 33 is a plate to which is firmly attached the central rod 34, which

page_text: passes through the body 32, and also through the plate 35, the whole being firmly
bound together by the cotter 36. Outlet holes 37, may be made in any desired
part of the moulds or core to permit of the escape of the surplus clay under the
moulding pressure.
The process of manufacture is as follows:-A quantity of clay is placed around
the core, which latter is then placed in the mould 26. Or what is generally
preferred, the layer of clay is laid in the mould and the core placed thereon, and
then another layer of clay placed upon the upper side of the core.
The upper
part mould 21, is now forced home upon the lower part 26, and thereby the
moulding is effected. After again raising the top mould, the cotter 36, is knocked
out, the plate 35 removed, then plate 33 with central rod 34 attached, is withdrawn.
The plate 25 is now slid forward (and the body 32 withdrawn) and tilted as
shown in dotted lines in Fig. 2, when the moulded pipe 37, Fig. 6, may now be
removed for other necessary finishing operations or treatment.
In Figs. 7, 8 & 9, sample moulds and core are shown for moulding bends, in
which 38, is the top mould which is secured to the attachment plate 20, as before,
the lower mould 39, being secured on the plate 25. 40, is the core having the
removable part 41, which is secured to the body 42, by the screw 43. As before
described the layer of clay is laid in the mould 39, then the core laid in, then
another layer of clay laid upon the core, when the top mould is brought down
forcibly until the bend is moulded, when the top mould is again raised out of the
way. The part 41 is now separated from the body 42, and the latter carefully
withdrawn, circular wise, from the bend, which latter is then removed from the
mould, to receive any required finishing treatment.
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed, we declare that
what we claim is :-
In the manufacture of chimney pots, louvres, pipe bends, and the like, the
process and employment of divisible moulds with a core or cores, constructed and
arranged and operated upon by pressure all substantially as herein set forth
and shown.
Dated this 9th day of
1004
CHARLES T. POWELL,
12, Cherry Street, Birmingham, Applicants' Agent.