Year: 1886

page_text: Date of Application, 29 June, 1886.
Complete Left, 29th Mar., 1887.
Complete Accepted, 29th Apr., 1887.
I, AMBROSE MYALL of 21 Cockspur Street in the county of Middlesex, Civil
Engineer do hereby declare the nature of this Invention to be as follows:-
My invention relates principally to improvements upon the invention for which
I made application for Letters Patent No. 2651, bearing date 23 February 1886,
and for which said invention provisional protection has been granted to me.
In the specification accompanying my said application No. 2651 of 1886, I describe
a method of increasing the effeciency of a surface condenser by dividing the tubes
into tiers boxes or sets, by means of plates affixed within the condenser, so that the
steam is compelled to take a zig-zag course among the tubes, the top plate of the
series being placed between the top row of tubes and the exhaust steam pipe, and
the bottom plate between the last row of tubes and the passage to the air pump.
According to my present invention, use only a top and bottom plate, and dispense
with the intermediate plates, and instead of having only one opening in one side of
each such plate, I perforate the entire surface of the plate and place upon it another
plate, similarly perforated, to form a gridiron valve."
"
These "
gridiron valves" are worked by means of a screw and winch handle
outside the condenser, or any other suitable device may be employed for this purpose.
The use of the said valves is to regulate the area of the openings or ports in the
plates as may be required.

page_text: The main advantages, which I obtain by this arrangement over my previous
invention, are, a greater distribution of the exhaust steam over a greater immediate
cooling surface, with a more equal temperature present throughout the cooling parts,
and a more rapid vacuum, again as the course of the exhaust steam and condensed
water is direct and not zig-zag, I obtain hotter feed water owing to the time of contact
with the cooling surfaces being of shorter duration.
I wish it to be understood that I may if desired omit the valve on the plate between
the tubes and the air pump passage, and simply use the perforated plate alone.
The use of this said plate, whether with or without a valve, is most important as it
equalizes the distribution of the power of the air pump and prevents the formation of
air pockets.
nah:. NOLL
1000
AMBROSE MYALL,
Inventors' Patent Right Association (Ld.),
21, Cockspur Street, London, S.W.

page_text: COMPLETE SPECIFICATION.
Improvements in Surface Condensers.
I, AMBROSE MYALL of 21 Cockspur Street in the county of Middlesex, Civil
Engineer do hereby declare the nature of this invention which invention has been
communicated to me from abroad by John McIntyre of 29 West Street, New York,
United States of America, Engineer and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
My invention relates principally to improvements upon the invention for which
I made application for Letters Patent No. 2651, bearing date 23 February 1886, the
complete specification of such application having been accepted.
In the specification accompanying my said application No. 2651 of 1886 I describe
a method of increasing the effeciency of a surface condenser by dividing the tubes
into tiers, boxes, or sets, by means of plates affixed within the condenser, so that the
steam is compelled to take a zig-zag course among the tubes, the top plates of the
series being placed between the top row of tubes and the exhaust steam pipe, and
the bottom plate between the last row of tubes and the passage to the air-pump.
In the accompanying two sheets of drawings Figure 1 is a cross-section through
the line X X in Figure 2, and
Figure 2 is a plan through the line Y Y in Figure 1 of a surface condenser
constructed according to my present invention.
Similar letters of reference denote similar parts in both figures.
A, A, is the shell, or outer case of the condenser, A¹ the steam inlet and A' the
outlet to the air-pump, B, B, are the tube plates and CC the tubes.
The end covers are omitted in the drawings, but they may be of the usual, or other
desired pattern.
A top plate D between the uppermost row of tubes and the steam inlet A', and a
bottom plate D¹ between the lowermost row of tubes and the outlet A³, only are
employed, and instead of forming but one opening in one side of each plate D and D¹,
I perforate the entire surface of the said plates with openings H and place upon them
similarly perforated plates E and F to form gridiron valves.
These gridiron valves are shewn as worked by means of screws E¹, F¹, and winch
handles E, F, in the same manner as shewn and described for working the valves
in the specification and drawings accompanying my aforesaid application No. 2651 of
1886, but any other suitable devices may be employed for this purpose.
The use of the said valves E and F is to regulate the area of the openings H
in the plates D and D₁ as may be required.
The main advantages which I obtain by this arrangement over my previous
invention No. 2651 of 1886, are a greater distribution of the exhaust steam over a
greater immediate cooling surface, with a more equal temperature present throughout
the cooling parts and a more rapid vacuum, again as the course of the exhaust steam
and condensed water is direct and not zig-zag, I obtain hotter feed-wåter owing to
the time of contact with the cooling surfaces being of shorter duration.

page_text: I wish it to be understood that
may, if desired, omit the valve F on the plate D¹
between the tubes and the air-pump passage A' and simply use the perforated plate D¹
alone. The use of this said perforated plate whether with or without a valve is most
important as it equalizes the distribution of the power of the air-pump and prevents
the formation of air-pockets in the condenser.
The arrows shewn in Figure 1 indicate the course and distribution of the steam and
air through the condenser.
I do not in practice confine myself to the particular shape or number of the
openings or perforations H as shewn in the plates D, D' and valves E and F in the
accompanying drawings.
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 :-
(1). In a tubular surface condenser the combination therewith of a plate D provided
with openings or perforations H, placed between the uppermost row of tubes and the
steam inlet and a plate D¹ provided with openings or perforations H placed between
the lowermost row of tubes and the outlet to the air-pump, also of gridiron valves E
and F to regulate the size of the openings H in the plates D and D¹ substantially
as and for the purposes herein described and shewn.
(2). In a tubular surface condenser the intervention of a plate D¹ provided with
openings or perforations H placed between the lowermost row of tubes and the outlet
to the air-pump (either without or in combination with a gridiron valve F) for causing
a more equal distribution of the power of the air-pump and preventing the formation
of air-pockets substantially as herein set forth.