IMPROVEMENTS. IN THE CONSTRUCTION AND MANUFACTURE OF TRAPS FOR WATERCLOSETS, DRAINS, AND OTHER PURPOSES
Year: 1867

page_text: LETTERS PATENT to George White Dinsdale, of Upper Norwood, in the
County of Surrey, Plumber, for the Invention of "IMPROVEMENTS. IN
THE CONSTRUCTION AND MANUFACTURE OF TRAPS FOR WATERCLOSETS, DRAINS,
AND OTHER PURPOSES."
Sealed the 12th November 1867, and dated the 3rd August 1867.
PROVISIONAL SPECIFICATION left by the said George White Dinsdale
at the Office of the Commissioners of Patents, with his Petition, on
the 3rd August 1867.
I, GEORGE WHITE DINSDALE, of Upper Norwood, in the County of Surrey,
Plumber, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN THE CONSTRUCTION AND MANUFACTURE OF TRAPS FOR WATERCLOSETS,
DRAINS, AND OTHER PURPOSES," to be as follows:-.
This Invention relates, first, to, improvements in the construction of D or
similarly formed traps applicable to waterclosets, drains, and other purposes
where D traps are employed. For this purpose I construct or form the dip
or inlet pipe of a D trap as part of the shell or body of the trap, which I
prefer to be of a curved oval form, the top being closed by a separate lid or
cover secured thereon by soldering or otherwise.
The second part of my Invention consists in casting the shell or body of a
D or similarly formed trap with the_dip_or_iulet_pipe_and_outlet-passage
forming part thereof, the top or cover being cast or formed therewith or

page_text: separately therefrom and fixed by soldering or otherwise. In place of casting
the dip or inlet pipe or passage as part of the shell or body of the trap
according to this part of my improvements it may form part of the cover
of the trap and be soldered or otherwise fixed to the lower portion of the trap.
Traps constructed according to my Invention may be cast in lead, tin, zinc,
or other metals or their alloys, or they may be made of earthenware.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George White Dinsdale in the Great. Seal Patent Office
on the 3rd February 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
WHITE DINSDALE, of Upper Norwood, in the County of Surrey, Plumber,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of August, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said George White Dinsdale, Her special licence that I, the said
George White Dinsdale, my executors, administrators, and assigns, or such
others as I, the said George White Dinsdale, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Tor
Invention for "IMPROVEMENTS IN- THE CONSTRUCTION AND MANUFACTURE
TRAPS FOR WATERCLOSETS," upon the condition (amongst others) that I, the
said George White Dinsdale, my executors or administrators; by an instru-
ment in writing under my, or their, or one of their hands and seals, should.
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months-next-and
-immediately after the date of the said Letters Patent.
.
NOW KNOW YE, that I, the said George White Dinsdale, do hereby
declare the nature of the said Invention, and in what manner the same.
is to be performed, to be particularly described and ascertained in and 'by
the following statement. thereof, that is to say:
This Invention relates, first, to improvements.in the construction. of D or

page_text: similarly formed, traps applicable to waterclosets, drains, and other purposes
where D traps are employed. For this purpose I construct or form the dip
or inlet pipe of a D trap as part of the shell or body of the trap, which I
prefer to be of a curved oval form, the top being closed. by a separate lid or
cover secured thereon by soldering or otherwise.
The second part of my Invention consists in casting the shell or body of
a D or similarly formed trap with the dip or inlet pipe and outlet passage
forming part thereof, the top or cover being cast or formed therewith or
separately therefrom, and fixed by soldering or otherwise. In place of casting
the dip or inlet pipe or passage as part of the shell or body of the trap
according to this part of my improvements it may form part of the cover of
the trap and be soldered or otherwise fixed to the lower portion of the trap.
Traps constructed according to my Invention may be cast in lead, tin, zinc,
or other metals or their alloys, ог they may be made of earthenware.
1.0
Heretofore what are known as D traps, applicable to waterclosets and other
purposes, have been made up of several parts soldered together, the inlet pipe
and cover being made separate from the basin or body of the trap previous to
being combined together to form the trap; such traps when formed of lead
soldered together in several parts are very subject to corrosion and decay, in
addition to being difficult and expensive to manufacture, and the first part
of my improvements consists in constructing or forming the dip or inlet pipe
of D-shaped traps as part of the shell or body of the trap, the top of which is
closed by a separate lid or cover which is fixed by soldering or other con-
venient means. Traps of this description may be made of lead or other soft
metal according to this part of my improvements in two parts by pressure in
dies, the lower portion being formed in one set of dies, and the upper part
or cover with the inlet pipe in another set of dies, the upper and lower
parts foruing the trap being afterwards soldered or otherwise combined
together to complete the trap; or traps of this character may be made of
earthenware, either complete.or in two parts, the cover being formed separate
from the body of the trap, but I prefer to cast them in moulds from molten
lead, tin, zinc, or other metal or alloys, of metal in the manner herein-after
described in accordance with the second part of my Invention, which I will now
proceed to describe, reference being had. to the Drawings hereunto annexed,
and to the figures and letters marked thereon.
DESCRIPTION OF THE DRAWINGS.

page_text: and outlet passage forming part of 'the shell or body of the trap, one-half of
the outer case a being removed in order to show.the arrangement of the
internal core b; Figure 2 shows a longitudinal section of the core b, and
Figures 3 and 4 show transverse sections of the core b'taken on the line. 1, 1,
of Figure 2, as seen in opposite directions...
.
The outer case a of the mould in the arrangement shown in the Drawing
is formed in two parts or halves divided in the direction of the length of the
trap to be cast therein, but this' may be varied, these parts being so formed
with a base plate or supports as to stand firmly'in position upon the frame c
of the mould, the two parts being clamped, bolted, or otherwise fixed together
when the mould and its core is set up ready. for casting a trap therein,
steady pins are inserted in the edges of the outer case where the two parts
come together. It will be seen on examing the Drawing that the core bis
composed of a series of segmental parts accurately fitted together and formed
with suitable projections or ribs and recesses or grooves where they come
together so as to engage or interlock with each other; and when thus com-
bined' they are finally secured by the insertion of the wedge-shaped segments
*,, so as to form a complete core, the outlet end of which is supported
within the outer case by resting in an opening of the standard. c²;
forming part of the frame or base plate c on which the mould is mounted.
The upper end of the part of the core 6 for forming the inlet pipe or passage
is supported in position by means of the screw nut b¹ screwed on the end of
the rod or link 62 attached to the lower end of the core by an eye or staple
as shown. The screw nut 61 is supported by the arm and standard. c
on the frame c, by which means the core bis supported within the outer
case a, whilst the molten metal is run into the mould around the upper end of
the case at a so as to fill the space between the. core b and outer case a, us
will be readily understood by any one acquainted with the process of casting
metal in moulds for other purposes.
Figure 5 shows a longitudinal section of a segmental core 6 (part or half of
the outer case a being removed) suitably arranged for casting a D trap, with
the inlet pipe and outlet passage combined therewith, but without the upper
side or cover, which is cast or formed separately therefrom; Figure 6 shows an
elevation and Figure 7 a plan of the segmental core b. In this arrangement
the segmental core for the shell or body of the D-trap is supported through
the opening o left in the upper part for the cover, as shown, and the core for
the inlet pipe is supported by projections 6* thereon which rest on the upper
surface of the outer casing a of the mould: The core 6 for the inlet pipe is
formed in four or other number of segments which are keyed or otherwise

page_text: In place
firmly connected together before the metal is run into the mould.
of casting the inlet pipe to form part of or in combination with the shell or
body of the trap it may be cast or formed in combination with the cover, and
be soldered or otherwise affixed therewith to the shell or body of the trap.
Having thus described the nature of my Invention, and the manner in
which the same is carried into practice, I would have it understood that I do
not confine myself to the exact details herein described, as the same may
be considerably varied without departing from the true character of my
Invention; but what I claim is,―
First, the construction of D or similarly shaped traps in two parts, the dip
or inlet pipe being either formed as part of the shell or body or in combination
with the cover of the trap, as herein described.
I also claim the construction or manufacture of D or similarly shaped traps
of earthenware in one or two parts, as herein described.
Secondly, I claim the manufacture of D or similarly shaped traps by
casting them complete in moulds with the dip and inlet pipe and outlet
passage forming part thereof, the top or cover being cast or formed therewith
or separately therefrom, or in combination with the top or cover, as herein
described.
In witness whereof, I, the said George White Dinsdale, have hereunto
set my hand and seal, this First day of February, in the year of our
Lord One thousand eight hundred and sixty-eight.
Witness,
10-
5
J. G. TONGUE,
GEORGE WHITE DINSDALE. (L.S.)
Patent Agent,
34, Southampton Buildings,
Chancery Lane, W.C.