Improvements in and relating to Cast and Drawn Lead Traps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Cast and Drawn Lead Traps.
I, ROBERT GEORGE LAING BURN, of 23 and 24, Charing Cross, Whitehall, in the
County of London, Sanitary Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
My invention relates to lead traps having a branch inlet pipe to receive overflow
water from such appliances as lavatories, sinks, or baths.
Hitherto lead traps have been manufactured without an overflow inlet pipe, and
it has been the practice to afterwards solder an overflow pipe into the inlet of the
trap, usually somewhat above the level of the column of water which seals the
Now I have found in
trap, or into the side of the trap under the water line.
practice that such constructions present disadvantages for in either case the flow
of the overflow water is checked, and the efficiency of the overflow is thereby
impaired; the object of my invention is to remedy these defects. According to
my invention, in the case for example of a drawn lead trap, I cut an opening into
the back of the trap close to the bottom of the U-shaped portion which contains
the water, and I connect a piece of lead pipe to same say at an angle of about 45°
to the vertical inlet pipe by means of a burned lead joint, and the pipe enters the
trap directly opposite to the outlet, whereby the flow of water is not impeded in its
course to the waste pipe, and thus the maximum of efficiency is obtained.
In the case of a cast lead trap, I connect a piece of pipe in the same manner as
already described for a drawn lead trap, or the overflow pipe may be cast in one
piece with the trap.
By this construction I considerably cheapen the cost of a trap with overflow
pipe, and at the same time produce a more efficient overflow than is usually
obtained when the pipe is connected and soldered in the ordinary or well known
manner as first stated.
.
When applying my invention, to say, the trap of a lavatory basin, the waste
may be connected to the inlet pipe of the trap and the overflow pipe bent up
and connected to the overflow arm of the basin. In this case the overflow pipe
might be fixed at the front, right, or left, of the lavatory according as the waste
is to run to the back, left, or right.
Or in another case, in trap applied to say a lavatory basin, the overflow pipe
may be connected to the inlet pipe of the trap, and the waste pipe connected to
the branch pipe. Such a construction is convenient in cases where the overflow
is at the back of a lavatory and the waste also runs to the back.
An important advantage incident to traps constructed according to my invention
is that the overflow, as well as the waste, is trapped, and thus there is no current of
air passing through the waste outlet and overflow pipe which is a frequent cause
of unpleasant smells, and in case the lavatory is not fitted with an accessible over-

page_text: flow, the overflow pipe can be readily cleansed from the cleaning screw fixed in
the bottom of the trap.
My invention as will be well understood can be readily applied to baths, sinks,
and the like substantially as and for the purpose hereinbefore stated.
Dated this 15th dor of March 1908
BREWER & SON,
London & Leeds, Agents for the Applicant.
Improvements in and relating to Cast and Drawn Lead Traps.
"
I, ROBERT GEORGE LAING BURN, of 23 and 24, Charing Cross, Whitehall, in the
County of London, Sanitary Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:
T
:
My invention relates to lead traps having a branch inlet pipe to receive overflow
water, from such appliances as lavatories, sinks, or baths.
2.1
Hitherto lead traps have been manufactured without an overflow inlet pipe, and
it has been the practice to afterwards solder an overflow pipe into the inlet of the
trap, usually somewhat above the level of the column of water which seals the
trap, or into the side of the trap under the water line.
I have found in practice that such constructions present disadvantages, for in
either case the flow of the overflow water is checked; and the efficiency of the
overflow is thereby impaired; now the object of my invention is to remedy these
defects.
I will describe my invention with reference to the accompanying drawing,
whereon is shewn in vertical section an example of my improved lead trap having
a branch inlet pipe.
According to my invention, in the case for example of a drawn lead trap,
I cut an opening into the back A of the trap, close to the bottom of the U-shaped
portion B, which contains the water, and I connect a piece of lead pipe C to same,
say at an angle of about 45° to the vertical inlet pipe D, by means of a barned
lead joint, and the pipe C enters the trap directly opposite to the outlet E, whereby
the flow of water is not impeded in its course to the waste pipe, and thus the
maximum of efficiency is obtained.
In the case of a cast lead trap, I connect a piece of pipe C in the same manner as
already described for a drawn lead trap, or the overflow pipe C may be cast in one
piece with the trap.
By this construction I considerably cheapen the cost of a trap with overflow
pipe, and at the same time produce a more efficient overflow than is usually
obtained, when the pipe is connected and soldered in the ordinary or well known
manner as first stated.
'
.
When applying my invention, to say the trap of a lavatory basin, the waste
may be connected to the inlet pipe of the trap and the overflow pipe bent up
and connected to the overflow arm of the basin. In this case the overflow pipe
might be fixed at the front, right, or left, of the lavatory, according as the waste
is to run to the back, left or right.
:
;
Or in another case in a trap applied, say to a lavatory basin, the overflow pipe
may be connected to the inlet pipe of the trap, and the waste pipe connected to
the branch pipe. Such a construction is convenient in cases where the overflow
is at the back of a lavatory and the waste also runs to the back.
:
An important advantage incident to traps, constructed according to my invention, is

page_text: that the overflow C, as well as the waste D, is trapped, and thus there is no current of
air passing through the waste outlet and overflow pipe, which is a frequent cause
of unpleasant smells, and in case the lavatory is not fitted with an accessible over-
flow, the overflow pipe can be readily cleansed from the cleaning screw, fixed in
the bottom of the trap.
My invention as will be well understood can be readily applied to baths, sinks,
and the like, substanțially as and for the purpose hereinbefore stated.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what 1
claim is:-
The arrangement and combination of cast or drawn lead traps having branch
inlet pipes, substantially as herein before described.
BREWER & SON,
London & Leeds, Agents for the Applicant.