IMPROVEMENTS IN STENCH TRAPS
Year: 1877

page_text: LETTERS PATENT to Matthew Wilson, of Leadenhall Street, in the City of
London, Merchant, for the Invention of "IMPROVEMENTS IN STENCH TRAPS."
Sealed the 29th December 1877, and dated the 5th July 1877.
PROVISIONAL SPECIFICATION left by the said Matthew Wilson at the Office
of the Commissioners of Patents on the 5th July 1877.
MATTHEW WILSON, of Leadenhall Street, in the City of London, Merchant.
"IMPROVEMENTS IN STENCH TRAPS."
This Invention relates to improvements in stench traps, and consists in so
constructing them that they will effectually prevent the escape of fóul air and gas
from sinks, drains, and other receptacles, and be less liable to derangement from
neglect of servants or otherwise than the stench traps commonly used.
I construct iny trap with a bell or inverted cup to be placed over the aperture of
the pipe through which the liquid passes from the trap as heretofore, and as
described in my Specification of Letters Patent granted to me, dated the 11th
February 1874, Nod. 534.
My further improvements consist in substituting for the rigid fixed bar now used
a revolving cross bar or rod, to which the bell or inverted cup is attached by means
of a loop cast upon the bell.
To carry out my improvements I drill a hole or socket on each side of the case
or box of the trap, into which the two ends of the bar are received and work loosely};
the bar being free to revolve renders the link or chain used in former traps
unnecessary, thus greatly reducing the depth of the trap, which is of great
advantage.
The essential features of these improvements is that by economizing space these
traps are made available in many instances where my former and other traps cannot
be used, on account of their depth; this bar or rod is slightly curved, consequently
when turned upwards raises the bell clear of the pipe, and, when required, can be
raised right over on to the top of this bar, leaving the whole of the pipe clear,

page_text: which enables me to thoroughly clear out the same, likewise all round the trap and
parts hitherto unattainable, whereas in my former Patent we were not able to
clean more than a portion at a time without a great deal of trouble; the grating
is received in a recess or rebate in the usual manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Matthew Wilson in the Great Seal Patent Office on the 5th January
1878.
MATTHEW WILSON, of Leadenhall Street, in the City of London, Merchant.
"IMPROVEMENTS IN STENCH TRAPS.">
This Invention relates to improvements in stench traps, and refer to those traps
known as bell traps, and consists in so constructing them that they will effectually
prevent the escape of foul air and gas from sinks, drains, and other receptacles, and
be less liable to derangement from neglect of servants or otherwise than the stench
traps commonly used..
I construct my trap with a bell or inverted cup to be placed over the aperture of
the pipe through which the liquid passes from the trap, as heretofore, and as
described in my Specification of Letters Patent granted to me, dated the 11th
February 1874, No. 534.
My further improvements consists in substituting for the rigid or fixed bar
now a revolving cross bar or rod, to which the bell or inverted cup is attached by
means of a loop inserted in the bell.
To carry out my improvements I drill a hole or socket, or these sockets may be
formed by means of a core when cast on each side of the case or box of the trap,
into which the two ends of the bar are received, and work loosely, the bar being
free to revolve renders the link or chain used in former traps unnecessary, thus
greatly reducing the depth of the trap.
One of the features of my present improvements are that by economizing space
they are made available in many instances where my former and other traps
cannot be used, on account of their depth, and also in this the bar can be driven
out, if required, and replaced, whereas in the old trap this could not be done unless
the trap was taken off."
The advantages of my improved. bell trap are,-
First. The bar works in a socket, thus allowing the bell to be turned up, so that
the pipe, if choked, may be readily got at.
Second. It cannot get out of place through carelessness or neglect of servants; and
another advantage of this principle is that the bell is so fixed that it cannot be
removed.
And, Third. The old bell, for instance; being cast on the grating, and the grating
having to be removed for cleansing, &c., the grating is oftener off than on, thereby
rendering the trap of little or no service.
Such being the nature and object of my said improvements in the bell trap, I will
now proceed to describe to describe the same in detail, and in order that the Inven-
tion may be fully understood, I have hereunto annexed a Sheet of Drawings illus-
trative thereof, and have marked the several views or Figures with figures and letters
of reference, the same letters referring to the same parts in both views or Figures.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 illustrates a vertical section of my improved stench trap, and shews
both the case and bell in section with the bell down in its normal position.
Figure 2 illustrates a similar section of the same trap with the grating removed,
and shews how the bell can be raised out of the case or box, so that every part of
the trap can be thoroughly got at for the purpose of cleansing the same.
These improvements consist in substituting for a rigidly fixed or lifting cross bar,
as shewn in my former Patent, a bent cross bar or rod A. capable of rotation. To
this bar or rod the bell or inverted cup B is attached by means of a loop C cast
upon or inserted in the bell.
The cross bar or rod A is supported at its ends in holes, sockets, or bearings D, D,
formed in the side of the case or box E of the trap; and sufficient freedom is
allowed for the ends of the cross bar A. to work or turn very freely and loosely in
the before-mentioned sockets or bearings D, D. The cross bar A is curved or bent
in the middle in such a manner that, when it is turned half a revolution, the bell B
which hangs from this bend in the bar is so considerably raised that its lowest part
is lifted clear of the top of the pipe F, and can when required be turned quite over
on the top of the bar A, as shewn in Figure 2, thus enabling every part of the
bell B of the pipe F, and of the annular water space G to be readily got at, so that
the whole of the parts can with facility and ease be quickly cleaned.
The normal position of the bar is with the bend downwards, as shewn in Figure 1,
which is the position it takes by its own gravity when free from control; the bell B
likewise has a tendency to gravitate to the. bend in the centre of the bar (when the
bend is downwards), and thus keeps itself centrally over the pipe F.
It will also be seen that one of the essential features of this my improved
arrangement is that the space required by the parts of the trap is greatly reduced,
whereby traps of my present arrangement are available in many instances where
those constructed according to my former Patent, and other traps, cannot be used, by
reason of the greater space they occupy, especially in depth. The grating H is
received in a recess or rebate in the rim or top edge of the case or box E in the
usual manner.
Though I have shewn on the Drawing a curved bar or rod I do not confine
myself to that particular shape, as in some cases if it should be thought desirable
to have a bell that could not be moved I may adopt a straight bar driven into the
sockets, and should the pipe become choked this bar can be driven out and replaced
without the removal of the trap.
Having thus described the nature and object of my said Invention, I declare that
what I claim as novel and original, and desire to be secured to me by the herein-
before in part recited Letters Patent is,-
First. The improvements in stench traps as and for the purposes herein-before
described.
Second. The general arrangement and combination of parts forming my improve-
ments in stench traps, as shewn on the Drawings, and herein-before described, or
any mere modification thereof.
In witness whereof, I, the said Matthew Wilson, have hereunto set my hand
and seal, this Fifth day of January, in the year of our Lord One thousand
eight hundred and seventy-eight.
MATTHEW WILSON.
(L.S.)