Improvements in Steam Traps.
Year: 1898

page_text: I, ROBERT COCKBURN, of Cumbrae House, Dumbreck, in the City of Glasgow,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object, to provide an improved steam trap for draining
and blowing off water collecting in pipes and vessels containing steam at high
pressure.
The improved steam trap comprises a covered casing or vessel whereinto the
water of condensation is drained and in which is hung an open pan or float
normally floated upwards against a stop by the water in the casing, but adapted
to sink vertically when the collecting water overflows the top of the pan or float
and partially fills it. The water outlet from the trap is through a pipe dipping
into the water contained in the pan or float and through an orifice in a bracket
extending within the casing above the float and fitted with a valve held normally
closed against a seat in the outlet orifice by a lever pivoted on the bracket and
from whose end the float is suspended. When the pan or float is sunk by the
overflow into it of the water collected in the casing the pivoted lever is tilted or
pulled down at one end so that it lifts the valve which is connected to its opposite
end, and the water within the pan or float is driven out through the outlet pipe
by the pressure of steam within the casing, the valve closing at its upper end
against a seat to prevent escape of steam when discharging the water. When
the bulk of the water has been thus blown off, the float rises and again closes
the valve against its seat in the outlet orifice.
1000
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
int Vincent Street, Glasgow, Agent for the Applicant.
Improvements in Steam Traps.
I, ROBERT COCKBURN, of Cumbrae House, Dumbreck, in the City of Glasgow,
Engineer, 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 has for its object, to provide an improved steam trap for draining
and blowing off water collecting in pipes and vessels containing steam at high
pressure.
The invention is illustrated by the accompanying drawings, Figure 1 being a

page_text: vertical section and Figure 2 a plan of the improved steam trap which comprises
a covered casing or vessel A whereinto the water of condensation is drained and
in which is hung an open pan or float B normally floated upwards against a
stop C by the water in the casing A, but adapted to sink vertically when the
collecting water overflows the top of the pan or float B and partially fills it.
The water outlet from the trap is through a pipe 1 dipping into the water contained
in the pan or float B and through an orifice E in a bracket E extending within
the casing above the float B and fitted with a valve held normally closed
against a seat G in the outlet orifice E by a lever H pivoted on the bracket E
and from whose end the float 13 is suspended. When the pan or float Bis
sunk by the overflow into it of the water collected in the casing A the pivoted
lever His tilted or pulled down at one end so that it lifts the valve F which
is connected to its opposite end, and the water within the pan or float Bis
driven out through the outlet pipe D and orifice E by the pressure of steam
within the casing A, the valve closing at its upper end against a seat. G¹
to prevent escape of steam when discharging the water. When the bulk of
the water has been thus blown off, the float B rises and again closes the valve F
against its seat G in the outlet orifice E.
The above described arrangement permits of the use of a large valve in the
outlet orifice, which is on that account not liable to get out of order, and from
its position in the steam space is free from choking by deposit of sediment carried
in the water of condensation.
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
1 claim is:-
1. A steam trap, the parts of which are constructed, combined and arranged
to operate substantially as described.
2. In a steam trap, the combination with an open pan or float and lever,
of a double faced valve fitted in the outlet orifice, and arranged to operate
substantially as described.
1000
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agent for the Applicant.