Improved Steam Trap.
Year: 1899

page_text: Complete Specification Left, 27th Sept., 1900-Accepted, 27th Oct., 1900
Improved Steam Trap.
JAMES CLELAND, of Drumaness, Ballynahinch, Co. Down, Ireland, Engineer, and
JOHN COULTER STEWART, of 6, Rhylstone Terrace, Strandtown, Belfast, Co. Down,
Ireland, Engineers' Agent, do hereby declare the nature of this invention to be
as follows:-
This invention relates to draining steam pipes of water and air.
It consists of an outer casing of iron tube, say 1 inch diameter, and about
30 inches long, on one end of which is screwed a coupling and on the other end
a tee.
Into the outer end of coupling is screwed a thimble, the outer end of which is
tapped for joining the trap to the steam pipe and the inner end forms a valve
seat.
Into the outer end of the tee (which is at the other end of trap) is screwed a
brass plug which is bored and tapped to receive a set screw having a jamnut.
Between the inner end of this set screw and the valve seat is placed a piece of
brass tube about 32 inches long and 5" dia. having a conical valve fixed on one
end; the other end resting on inner end of set screw by means of which the
conical valve can be regulated or adjusted to its seat.
Its action is as follows:-When steam is admitted to a system of pipes having
the trap attached to their extremity the air and water is forced past conical valve
(which is full open when cold) and passing along the brass tube escapes through
the open branch of the tee at the other end of trap; the valve remains open until
the water comes hot when it expands the brass tube and partially or wholly
closes the valve, thereby trapping the steam.
D
0711 J
Damho 1800
JAS. CLELAND,
JNO. C. STEWART.
Improved Steam Trap.
JAMES CLELAND, Drumaness, Ballynahinch, County Down, Ireland, Engineer,
and JOHN COULTER STEWART, 6, Rhylstone Terrace, Strandtown, Belfast, County
Down, Ireland, Engineers' Agent, 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:.
-
This invention relates to draining steam pipes of water & air, and in order

page_text: that the principle of construction of said invention may be properly understood
we have hereunto appended an explanatory sheet of drawings, whereon:-
Fig. 1 is a side elevation.
Fig. 2 is an end elevation.
Fig. 3 is a sectional side elevation.
"
a
وو
"b"
on Figs. 1 & 3 shows the outer casing which is preferably made of tube
about 1 inch diameter & 30 inches long, on one end of which is screwed a coup-
ling band on the other end a tee "" In to the outer end of coupling
is screwed a thimble "e" the outer end of which is tapped for joining the trap
to the steam pipe to be drained, and the inner end of this thimble c forms a valve
seat.
In to the outer end of the tee is screwed a brass plug e which is bored and
tapped to receive a set screw "g" having a jamnut f. Between the inner end
of this set screw g" and the valve seat in thimble "c" is placed a piece of
tube "h" preferably brass about 32 inches long, and about inch diameter
having a conical valve "k" fitting in one end, the other end resting on inner
end of set screw <<
g" by means of which the conical valve "k" can be adjusted
to its seat.
The action of trap is as follows:-When steam is admitted to a range or coil
of pipes having the trap attached to their extremity the air and water is forced
past the conical valve, which is full open when the trap is cold, and passing
along the outside of inner tube "h" escapes through the open branch of the
tee d" (see Fig. 3) at the other end of trap. The valve "k" remains open
until the water comes hot when it expands the brass tube "" and partially or
wholly closes the valve "k" on its seat in thimble "c" thereby trapping the
steam. The branch or outlet of the tee "d" is tapped for attaching a discharge
pipe to convey the condensation water away.
These traps may be made any size, and in addition to steam pipes & coils may
be used for draining any cylinder or machine or any vessel in which steam is
used.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
"A steam trap that can be constructed chiefly of tubing, substantially as herein-
before set forth, and acting in such a manner that the condensation water and
air as they escape over a straight tube control the movement of valve to trap the
steam without waste.