Improvements in Steam Traps or Apparatus for Separating Water or other Liquids from Steam Vapours or Gases.
Year: 1890

page_text: Date of Application, 7th Aug., 1890
Complete Specification Left, 7th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Traps or Apparatus for Separating Water
or other Liquids from Steam Vapours or Gases.
We, ISAAC SIIMWELL MCDOUGALL and JAMES THOMAS MCDOUGALL both
of the firm of McDougall Brothers of 10 Mark Lane in the City of London
Manufacturing Chemists and THOMAS SUGDEN of 10 Mark Lane aforesaid,
Engineer do hereby declare the nature of this invention to be as follows:
:-
This invention relates to improvements in steam traps or apparatus for separating
water or other liquids from steam vapours or gases such as are described in the
Specification of Letters Patent No. 6350 dated 23rd May 1885 the object of the
present invention being to render the same more efficient in action. According to
the present invention the float is made of greater depth than hitherto and less
length longitudinally of the casing being preferably cylindrical and contained in a
cylindrical part of the casing. The lever which carries it and the weight is
mounted on knife edges or centres in the fulcrum standard in holes which allow of
the upward movement of the knife edges or centre pin. The rod of the equili-
brium valve is connected to the lever very near to its fulcrum so that when the
valve is fully closed the knife edges or centre pin leave or leaves their or its
bearing in the fulcrum stand and the weight is received by the equilibrium valve
rod. The said valve is contained in seatings in the outlet which has combined
with it the door which closes the lower part of the trap so that by undoing the
pin which connects the valve to its rod the door and outlet with the valve and
its seatings can be removed from the opening covered by the said door. This door
also answers for cleaning purposes.
To enable the valve to be forced down to its seat by hand when necessary as
well as to be raised therefrom there is provided a test lever with two bearing parts
one below and one above the lever or some part by which the valve can be moved
up and down by the said test lever.
This test lever preferably consists of a rod mounted in bearings in the upper
part of the casing and extending from side to side thereof one end projecting to
the outside and there being provided with an operating hand lever, by which the
rod can be partly rotated. This rod has secured to it inside the casing an arm
or pair of arms carrying 2 pins one extending over and the other extending under
the lever carrying the float weight and equilibrium valve. The distance between
the pins is sufficient to allow the movement of the lever in ordinary work.
When it is desired to lift the valve from its seats and press it down again to its
seats the hand lever is operated in one and the other direction one of the aforesaid
pins acting on the underside of the lever to force the valve up and the other of
the said pins acting on the upper side of the lever to force it down.
Dated this 7th day of August. 1890.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam Traps or Apparatus for Separating Water
or other Liquids from Steam Vapours or Gases.
We ISAAC SHIM WELL MCDOUGALL and JAMES THOMAS MCDOUGALL of
the firm of McDougall Brothers of 10 Mark Lane in the City of London Manu-
facturing Chemists and THOMAS SUGDEN of 10 Mark Lane aforesaid 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 relates to improvements in steam traps or apparatus for separating
water or other liquids from steam vapours or gases such as are described in the
Specification of Letters Patent No. 6350 dated 23 May 1885 the object of the
present invention being to render the same more efficient in action. We will
describe the invention with reference to the accompanying drawing Figure 1 of
which is a longitudinal section and Figure 2 is a transverse section on the line 1. 2.
Figure 1 of a steam trap with the present improvements applied thereto.
According to the present invention the float C is made of greater depth than
hitherto and less length longitudinally of the casing A; the said float being
preferably cylindrical and contained in a cylindrical part A of the casing A.
The lever B which carries the said float C and the weight D is mounted on knife
edges on the centre pin a² in the fulcrum standard a in holes which allow of the
upward movement of the said centre pin. The rod e of the equilibrium valve E
is connected to the lever B very near to its fulcrum a² as shewn and on the same
side of the fulcrum as the float C so that when the valve E is fully closed the
knife edges of the centre pin a² leave their bearing in the fulcrum standard a and
the weight of the lever B and its attachments is received by the equilibrium
valve E through the rod e. The valve E is contained in seatings in the outlet A³
which has combined with it the door A which closes the lower part of the trap
so that by undoing the pin e² which connects the valve E to its rode the door and
outlet with the valve and its seatings can be removed from the opening covered by
the said door. To enable the valve E to be forced down to its seat by hand
when necessary as well as to be raised therefrom there is provided a test lever
with two bearing parts one below and one above the lever or some other part by
which the lever can be moved up and down by the said test lever. This test lever
preferably consists of a rod y mounted in bearings in the upper part of the casing
and extending from side to side thereof one end projecting to the outside and
there being provided with an operating hand lever G. by which the rod g can
be partly rotated. This rod has secured to it inside the casing an arm or pair
of arms carrying two pins g³ and g₁ one (g³) extending over and the other (9)
extending under the lever B. carrying the float C. weight D. and equilibrium
valve E. The distance between the pins and g is sufficient to allow the
movement of the lever B. in ordinary work. When it is desired to lift the
valve E from its seats and press it down again to its seats, the hand lever is
operated in one or the other direction one of the aforesaid pins (that g*) acting
on the underside of the lever B. to force the valve up and the other of the
said pins that y³ acting on the upper side of the lever B. to force the valve down.
Having now particularly described and -ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim, is.
First. In apparatus of the kind referred to the float C. and part A¹ of the
casing for containing it as described the lever B. being provided with a fulcrum
arranged as described and so that when the said float is in its lower position the
weight of the lever and its adjuncts is taken on the stem e of the valve as herein-
before described.

page_text: Second. In apparatus of the kind referred to the testing arrangement shewn by
means of which the valve can be lifted from its seat or depressed onto its seat by
moving the handle of the testing arrangement in one or the other direction as
hereinbefore described.
Third. The arrangement and combination of parts constituting the apparatus
as a whole as herein before described and shewn in the accompanying drawings
whether the knife edge centre pin arrangement a* or an ordinary centre pin be
used.
I. S. M'DOUGALL.
JAMES T. M'DOUGALL.
T. SUGDEN.
By J. H. Johnson & Co.,
Agents.