Improvements in Making Cast Metal Panels for Holding Tiles and other Articles.
Year: 1897

page_text: Date of Application, 17th Nov., 1897
Complete Specification Left, 11th Aug., 1898-Accepted, 1st Oct., 1898
PROVISIONAL SPECIFICATION.
Improvements in Making Cast Metal Panels for Holding Tiles and
other Articles.
We, JOHN NICOL MITCHELL, Manager, and WILLIAM MORRISON, Foreman, both of
Parkhouse Iron Works, Falkirk, in the County of Stirling, North Britain, do hereby
declare the nature of this invention to be as follows:-
It relates to cast metal panels for holding tiles and other articles and has for it's
principal objects to make a complete panel at one operation also more cheaply,
rapidly and efficient than by the methods at present in use.
In carrying out one modification of this invention the pattern of a cast metal panel
for containing tiles is made with a recess of suitable size and depth for holding them
and in that plate (solid or perforated) which is behind the tiles are guides for
indicating where screw threaded nuts are to be placed in the sand mould for being
embedded in the said back plate of the panel during the process of casting it
wherever four tiles are intended to meet.
The front margin of this tile panel overhangs the recess in order to frame and keep
in the adjacent edges of the outermost tiles. To effect the moulding of this trough
shaped, recess with overhanging ledges at the front, three loose (overhanging) strips
constitute parts of the pattern and are laid in a front recess upon the right, left and
bottom margins of the said panel. These three strips form parts of the inner inar-
ginal face of the panel. The small portion of this inner margin which overhangs the
tiled recess serves in the finished article to hold in the edges of the outermost tiles
which occupy the panel. The fourth or top margin of the panel has no loose strip in
this modification. In forming the sand moulds preparatory to casting a panel as
above described these three loose strips being slightly embedded at their overhanging
edges in the sand are lifted away from the pattern when the sand moulds are parted
and require to be drawn out from the sand by what is called "side lifts;" and when
the casting is afterwards removed from the sand mould it contains a recess for hold-
ing tiles having an overhanging front margin for keeping them in and an opening at
the top for inserting all or part of them. The top of the tile recess in this modifica.
tion is open for the insertion of tiles and packing behind them to secure their truė
alignment at the front.
Another modification of the invention is a cast metal panel for tiles made very
similarly to the first one. The recess for tiles, in this modification, is made like a
shallow trough or tray with perforated bottom and four overhanging loose strips for
being drawn out of the sand by "side lifts" in the process of moulding. All the
tiles in a panel made according to this modification require to be inserted at the front,
as there is no opening into the recess at the top such as that in the first named
modification.
When, a, cast metal panel for containing tiles has been made in accordance with
either of the modifications described herein it does not require any skilled' labour for
fitting in the tiles but is ready for the tiles screws and packing as soon as the casting
bas been. removed from the sand and dressed:

page_text: Recessed cast metal panels with overhanging front edges made in accordance with
this invention are designed for holding mirrors or other articles than tiles.
One or more marginal parts of the mould are made loose when required and
adapted for being fixed in different positions for the formation of two or more sizes
of panel from the same mould.
Dated this Thuth Jan
1007
Improvements in Making Cast Metal Panels for Holding Tiles and
other Articles.
We, JOHN NICOL MITCHELL, Manager, Parkhouse Iron Works, and WILLIAM
MORRISON (formerly Foreman, Parkhouse Iron Works), now Manufacturer, 17, East
Graham Street, both of Falkirk, in the County of Stirling, North Britain, 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:
It relates to cast metal panels for holding tiles and other articles and has for its
principal objects to make a complete panel at one operation; also more cheaply,
rapidly and efficient than by the methods at present in use.
The invention will be better understood if reference is made to the accompanying
drawings, in which :-
Figure 1 is a back view in perspective of a cast metal panel with perforated back
recessed for holding tiles or other articles.
Figure 2 is a sectional view through Y, Y, of the cast metal panel shewn in
Fig. 1.
Figure 3 is a front view in perspective of a set of patterns adapted for making a
cast metal panel in accordance with this invention.
Figure 4 is a sectional view through Z, Z, of the panel patterns shewn in Fig. 3.
Figures 5 to 8 are views in section and perspective shewing casting boxes con-
taining sand moulds and parts of the patterns for making cast metal panels in
accordance with this invention.
Figure 9 is a sectional view of the patterns shewn in Figs. 5 and 6 adapted for use
in making cast metal panels in accordance with this invention.
Figure 10 is an enlarged sectional view shewing a fragment of the patterns
represented in Fig. 9.
Figure 11 is an enlarged view in section shewing a fragment of a cast metal panel
after it has been made from the patterns shewn in Figs. 9 and 10.
Similar letters of reference and numerals throughout the illustrations indicate
corresponding parts.
"
In carrying out one modification of the invention, as indicated in Figs. 1 and 2 of
the drawings, the pattern of a cast metal panel A for containing tiles is made with a
recessed part, plate or grating a¹ of suitable size and depth for holding them and in
that part, a (either perforated as shewn in Fig. 1 or solid as shewn in Fig. 3) which
is behind the tiles are 66.
core-prints or guides a² for indicating where screw-
threaded nuts are to be placed in the sand mould. These parts a² are made where-
ever four tiles are intended to meet and each one leaves an impress in the sand
mould
upon which
a screw-threaded nut is placed in order that it may be embedded
in the cast metal back plate a¹ during the process of casting it.
In Figs. 6 to 8 small sand cores, as are represented formed by the "core prints" a².

page_text: The front margin at of this tile panel A, overhangs each side of the recessed
plate a in the manner shewn in Figs. 2 and 11 in order to frame and keep in the
adjacent edges of the outermost tiles. In order to effect at one operation the
moulding in sand of this trough shaped recess A, a', a, with overhanging ledges a¹
at the front, three loose overhanging strips a comprise parts of the pattern. These
strips a are laid, when moulding these tile panels, in a front recessed part a con-
tained upon the right, left and bottom margins of the panelled recess a¹, aº.
These three loose strips a¹ are designed to form in the sand mould three sides of
the inner marginal border or face of the panel A. The small portion of this inner
margin a which overhangs the tiled recess (a7 Fig. 11) serves in the finished article
to hold in the edges of the outermost tiles which occupy the recess or panel... The
fourth or top margin as of a panel made in accordance with this modification, and
shewn in Fig. 1, has no loose strip in the pattern from which it is moulded: In
this modification the perforated or other plate a¹ is united to the plate A by means
of the three sides or walls a³ which determine the depth and size of the tile recess :
the recessed plate a¹ in this modification has no side wall a at the top for
uniting it to the border a8 but the top of this tile recess is open as shewn in
Figs. 1 and 2, adapting it for the insertion at that part of the tiles; packing can
also be inserted behind the tiles to secure their true alignment at the front.
The recess a with the strip as removed therefrom are shewn in the sectional
fragment Fig. 10, and in Figs. 4 and 9 loose strips a5 are indicated as occupying
recesses in a panel A. In Fig. 4 the strips as are shewn in fragments only
in order that the recess a may be seen.
:
In forming the sand moulds B, Figs. 5 to 8, preparatory to casting a recessed tile
panel with overhanging edges therein, as above described, these three loose
strips a', which have first been laid in the recess, become embedded in the sand
at their overhanging edges and are lifted away from the rest of the pattern as
shewn in Figs. 6 and 7 when the sand moulds are separated: see Figs. 5 and 6.
These strips a³ are then drawn out from the sand, (see Fig. 8) by what is commonly
called "side-lifts." When the casting is removed from the sand mould it contains
a recess for holding tiles having an overhanging front margin for keeping. them in
and an opening at the top as shewn in Fig. 1, for inserting them..
In Figs. 5 to 8 the parts marked B represent the sand moulds contained within
casting boxes C: Figs. 5 and 6 represent two associate casting boxes; the lower one
contains the recessed panel A, u¹, a, and the upper one retains the strips as: Fig. 7
represents this upper one turned over in readiness for the withdrawal of the said
strips, and Fig. 8 shews the three loose strips drawn aside ready for removal..
Another modification of the invention is represented in Figs. 3 and 4 and relates
to a cast metal panel for tiles which is, and is made, very similarly to the one first
described herein. The recess for tiles in this modification is made in the form of a
shallow trough or tray with perforated or solid plate a¹ united to the border plate. A
by means of four sides or walls a³ (instead of three) see Fig. 1, and an overhanging
margin at is formed upon each of the four sides of the tile recess by means of laying
four loose strips as within a depressed part, as, of the pattern similarly to the method
described and drawn under the first modification: these four strips, as, being
withdrawn by "side-lifts," as before described, from the sand mould when the two
box parts C have been separated.
All the tiles which are put into a panel made according to this second inodification
require to be inserted at the front as there is no opening at the top into the tile
space such as that described and shewn under the first modification. If the back
plate a Figs. 3 and 4 is liberally perforated the tiles can be packed from behind and
brought into true alignment.
"Core-prints" and enlarged parts a² Fig. 10 are formed in the plate a¹ where four
tiles are required to meet for the purpose of forming cores or supports in the sand
mould upon which screw-threaded nuts are placed in the ordinary manner before
closing the mould and pouring in the molten metal.
When a cast metal panel A, a', a, a, for containing tiles has been inade in

page_text: accordance with either of the modifications described herein it does not require
any skilled labour for fitting in the tiles but is ready for the reception of the
tiles, their packing and retaining screws as soon as the casting has been removed
froin the sand mould and dressed, cleaned and painted.
Recessed' cast metal panels A, a', a³, with overhanging front edges a made in
accordance with this invention are designed for holding mirrors or other articles
and not merely tiles.
More than one size of tile panel can be made from one set of patterns in
accordance with this invention if one or more marginal' parts of the moulds or
patterns are made loose and adapted for being removed and replaced by others of
larger or smaller dimensions. This is done upon a turn-over-board "in the usual
manner.
Raised or ornamenting mouldings can be laid removeably upon the strips a³ before
moulding a tile panel in accordance with this invention and removed from the sand
mould after the strips as have been withdrawn.
We are aware that prior to our invention a cast metal recessed panel has been
made having overhanging edges similar to those marked a for holding in tiles by
casting it in one piece in a sand mould; also cast metal articles with undercut or
overhanging edges formed by means of loose and removeable strips in the pattern
which became embedded in the sand mould and were removed therefrom before
casting by means of "side-lifts," also that screw-threaded nuts have been inserted in
sand moulds; it will therefore be understood that we do not claim such things as our
invention.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what we
claim is :-
First. The method of making a cast metal recessed panel A, a¹, a³, a³ having three
undercut or overhanging margins a in one piece from patterns wherein each over-
hanging margin is formed by a loose strip a placed in a recess as and adapted for
being lifted and taken away froin the remainder of the pattern when the box parts C
are separated and then of being removed from the sand mould B by a "side-lift"
process, substantially as herein described with reference to the drawings for the
purposes specified.
Second. The method of making in one piece a cast inetal recessed panel A, a¹, a³,
having four undercut or overhanging margins a¹, from patterns wherein each over-
hanging margin is formed by a loose strip a placed in a recess a and adapted for
being lifted and removed from the remainder of the pattern when the box parts C
are separated and then of being removed from the sand mould B by a " side-lift. "
process, substantially as herein described with reference to the drawings for the
purposes specified.
Third. In the process of making in one piece à cast metal recessed panel A, a¹,
a, a the combination with the patterns therefor of the devices a³, a, substantially
as herein described and drawn for the purposes specified.
Fourth. In patterns for use in the process of making in one piece a cast metal
recessed panel A, a¹, a', a the combination therewith of the loose strips a
substantially as herein described with reference to the drawings for the purposes
specified.
Fifth. The improvements in making cast metal panels, comprising the methods
and means herein described with reference to the drawings or any mere modification
thereof for the purposes spécified.