Improvements in Kitchen or Grease Traps.
Year: 1891

page_text: Date of Application, 1st May, 1891
Complete Specification Left, 1st Feb., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Kitchen or Grease Traps.
I, THOMAS WILLIAM TWYFORD of Hanley, in the County of Stafford, Manu-
facturing Sanitary Potter do hereby declare the nature of this invention to be as
follows:-
In perfect house sanitation, it is essential that the kitchen sinks should be
unassociated, or unconnected with the main drains, hence the necessity of independent
traps being employed in connection with sinks only.
My invention has for its object, a sink or kitchen trap, so constructed and
arranged, that the sink water, which has usually intermingled with it, grease, and
other inert fatty matters, is discharged into a catch-pit of the trap, below the water
level constituting the seal of the same, and further, the said trap is also provided
with a ventilator for preventing it becoming air-bound, and also with an automatic
flushing pipe, arranged to flush intermittently, and so break up and remove the
greasy or fatty matters lying or floating upon the surface of the water within the
catch-pit.
The trap, with its accessory parts, is made preferably integral, or in a single
piece, and from earthenware, stone-ware, cast iron, or other material, and consists
of an enclosed catch pit or box body part, preferably rounded off upon its underside,
and with an aqueous or sink water pipe situated on one side, and with the inner and
open end directed to the bottom of the said catch pit, below the water line, while
its upper end is directed and bends above the top side of the trap, which has an
inlet, covered by a lid, and through which inlet, access is gained for the cleaning of
the interior, or the passages leading thereto.
Proceeding upwards from the top side of the trap, is a flushing pipe, with its
entrance to the tap coming above the water line, and wherethrough automatic
flushings pass; while leading from the top side of the said trap, or from the sink
water pipe, is a ventilator, for preventing the same becoming air-bound.
Proceeding from the upper part of the other side of the trap, is an open ended
and bent down-pipe, with its discharge coming below the bottom of the trap, and
its entrance coming in front of the water line, and before a bridge, which is open at
top and bottom, but is disposed midway between the water line or water level.
Connected with the inlet pipe, is an intermittent automatic flusher.
On greasy water being conveyed down its pipe, from the sink, it is discharged
into the trap below the water line, and on coming into contact with the cold water
contained within the catch pit of the body part, the fatty matters are consolidated
by cooling, and ascend to the surface of the said water, and there remain until
broken up and removed by a subsequent flushing through the flush-pipe.
This flushing, which takes place at timed intervals, washes the whole of the
matters contained within the catch pit, over and under the bridge, and thence away
through the down-pipe.
Where more than one trap is fixed and arranged over each other, then the same
ventilating pipe may be employed for preventing them becoming air-bound as
aforesaid.
Among the advantages appertaining to my invention, is that the trap admits of
being automatically flushed, and hence grease or other matters collected within
the same being broken up and expelled, and further, by conducting the greasy
water to the bottom of the catch pit, the grease is confined to the water, without
adhering to either the sides of the trap, or to the conduits of it.
A further advantage is that the trap is thoroughly and efficiently ventilated, and

page_text: that a series of traps may be connected with a single automatic cistern, without the
possibility of them becoming air-bound, and as a still further advantage, the whole
of the trap, and its component parts, are made integral, and preferably from fire-clay
glazed or enamelled internally.
In addition to the above advantages, the interior of the trap and parts are readily
accessible.
THOMAS WILLIAM TWYFORD,
By Henry Skerrett,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Kitchen or Grease Traps.
I, THOMAS WILLIAM TWYFORD of Hanley, in the County of Stafford, Manu-
facturing Sanitary Potter, 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:-
In perfect house sanitation, it is essential that the kitchen sinks should be
unassociated, or unconnected with the main drains, hence the necessity of indepen-
dent traps being employed in connection with sinks only.
My invention has for its object, a sink or kitchen trap, so constructed and
arranged, that the sink water, which has usually intermingled with it, grease, and
other inert fatty matters, is discharged into a catch pit of the trap, below the water
level constituting the seal of the same, and further, the said trap is also provided
with a ventilator for preventing it becoming air-bound, and also with an automatic
flushing pipe, arranged to flush intermittently, and so break up and remove the
greasy or fatty matters lying or floating upon the surface of the water within the
catch-pit.
The trap with its accessory parts, is made preferably integral, or in a single piece,
and from earthenware, stone-ware, cast iron, or other material, and consists of an
enclosed catch-pit or box body part, preferably rounded off upon its underside, and
with an aqueous or sink water pipe situated on one side, and with the inner and
open end directed to the bottom of the said catch-pit, below the water line, while
its upper end is directed and bends above the top side of the trap, which has an
inlet, covered by a lid, and through which inlet, access is gained for the cleaning of
the interior, or the passages leading thereto.
Proceeding upwards from the top side of the trap, is a flushing pipe, with its
entrance to the trap, coming above the water line, and wherethrough automatic
flushings pass, while leading from the top side of the said trap, or from the sink
water pipe, is a ventilator, for preventing the same becoming air-bound.
Proceeding from the upper part of the other side of the trap, is an open ended
and bent-down pipe, with its discharge coming below the bottom of the trap, and
its entrance coming in front of the water line, and before a bridge which is open at
top and bottom, but is disposed midway between the water line or water level.
Connected with the inlet pipe, is an intermittent automatic flusher.
On greasy water being conveyed down its pipe, from the sink, it is discharged
into the trap below the water line, and ou coming into contact with the cold water
contained within the catch pit of the body part, the fatty matters are solidified by
cooling, and ascend to the surface of the said water, and there remain until broken
up and removed by a subsequent flushing through the flush pipe.
This flushing, which takes place at timed intervals, washes the whole of the
matters contained within the catch-pit, over and under the bridge, and thence away
through the down pipe.
Where more than one trap is fixed and arranged over each other, then the same

page_text: ventilating pipe may be employed for preventing them becoming air-bound as
aforesaid.
Among the advantages appertaining to my invention, is that the trap admits of
being automatically flushed, and hence grease, or other matters collected within the
same being broken up and expelled, and further by conducting the greasy water to
the bottom of the catch-pit, the grease is confined to the water, without adhering to
either the sides of the trap, or to the conduits of it.
A further advantage is that the trap is thoroughly and efficiently ventilated, and
that a series of traps may be connected with a single automatic cistern, without the
possibility of them becoming air-bound, and as a still further advantage, the whole
of the trap and its component parts, are made integral, and preferably from fire-clay,
glazed or enamelled internally.
In addition to the above advantages, the interior of the trap and parts, are
readily accessible.
Figure 1 of the accompanying drawings, represents in longitudinal vertical
section, a sink, kitchen, or grease trap, constructed and arranged according to my
invention.
It will be seen that the said trap is composed essentially of a catch pit body part,
with a bridge having top and bottom clearances, which holds the grease in check
within the said pit, until the same is disintergerated or broken up by the action of
a powerful flush, directed through a flush pipe, which is approximate to the inlet
pipe leading from the sink or the like, and which latter pipe has a ventilator, to
prevent the same becoming air-bound.
Figure 2 represents part horizontal section and part plan of the said kitchen or
grease trap.
Figure 3 represents a cross section of the said trap upon the dotted lines A B,
showing the bridge, and the top and bottom clearances of it.
The same letters of reference indicate corresponding parts in the several figures
of the drawings.
a is an enclosed catch-pit or body part, made integral, or in one piece with the
accessory parts, as hereinafter described; 6 is an all-through subaqueous sink water
inlet pipe, having an entrance 62, and an outlet 6. The mouth of the outlet *, is
directed below the water line, into the bottom of the catch pit, whilst the upper and
inlet part 63, is directed and bends outwardly, from above the top of the trap, which
has a cover or lid c, fitting into a hand hole or opening d, made within the middle
of the said trap, and through which, access is made, for removing any accumulated
foreign matters from the interior of the body part, or from the entrances or exits of
the pipes or passages.
e is a ventilating pipe, leading upwards from near the end of the part 62, of the
part b, and is for the purpose of allowing the escape of air, and for preventing the
same from becoming air bound.
Proceeding upwards from the top of the trap, and in juxta position to the sink
water pipe, is a flush pipe f, down which, or wherethrough, automatic flushings,
intermittently pass, for the breaking up of a stratum or strata g, of grease, deposited
This water forms
upon the surface of the water h, lying within the catch pit a.
both the seal to the trap, and also the cooling means for solidifying and bringing
the grease within a confined space, to wit, between the sides of the catch pit and
the cross bridge i, which has upper and lower clearances 2, 3, and between it and an
inner wall, of the down pipe j, is a pool k, wherethrough the water from the
catch pit passes, prior to passing down the outlet pipe j.
On
greasy water being conveyed down the pipe b, through the outlet 6, of the
same, and from thence discharged into the catch trap below the water line, any
greasy or oleagenous matters contained within the said sink water, on coming into
intimate contact with the cold water in the catch pit, immediately ascends to the
surface thereof, and becomes solidified, forming a continuous layer of inert matter,
which is broken up by a subsequent flush, when the whole is washed past the
bridge, through the pool, and down the outlet pipe.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
:
First In a sink, kitchen or grease trap, providing the same, with a transversely
directed bridge, or semi partition, with top and bottom clearances, arranged and
combined, substantially as, and for the purpose, as described and set forth.
Secondly-In a sink, kitchen or grease trap, providing or fitting the same with
an inlet pipe, and an automatic flush pipe, and with the exit or inner part of the
former, coming or directing itself below the water line of the seal of the said trap,
substantially as, and for the purpose, as described and set forth.
Thirdly-A sink, kitchen or grease trap, having an inlet pipe with its lower
end coming below the water level of the seal, and its upper end provided with a
ventilator, substantially as described and set forth.
Fourthly-A sink, kitchen or grease trap, consisting of a hollow body part or
catch pit, provided with a top and bottom clearance bridge, inlet pipe with inner
end coming below the water seal, ventilator with inlet pipe, flush pipe, outlet pipe,
and lid or cover, all constructed arranged, combined, and made in one piece,
substantially as described and set forth.
:-
Fifthly A sink, kitchen or grease trap, the construction, formation, and
making of the body part of the said article or articles in one piece of earthenware
or other suitable material, substantially as described and set forth.
Dated this 30th day of January 1892.
THOMAS WILLIAM TWYFORD,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.