Improvements in the Construction of Steam and Hot Water Coils or Radiators.
Year: 1891

page_text: Date of Application, 1st Sept., 1891-Accepted, 3rd Oct., 1891
.
COMPLETE SPECIFICATION.
Improvements in the Construction of Steam and Hot Water Coils
or Radiators.
I, WILLIAM PHILIPPS WENHAM, of Paragon Works, Croydon, London S.E.
Engineer, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :--
The objects of my invention are, to effect economy in the construction, and to
increase the efficiency of steam and hot water coils and radiators.
My invention consists of double concentric vertical tubes; the inner tube being
utilised for the passage of a current of air to be heated, and the annular space
between the inner and outer tubes being filled with steam or hot water.
The external tube is cast with suitable openings for forming connections with
horizontal and other pipes or tubes. Each external tube is also cast with an
internal flange at each end. These flanges form annular end plates to the finid
space. The flanges are bored either parallel or conically to receive the inner
tube, which is preferably made of solid drawn metal tube, and is secured in
position by expanding or coning it in the annular flanges at each end, by an
ordinary tube expander, or other suitable tool.
In connecting a number of tubes, to form a radiating coil, provision is made
for the free passage and circulation of air through the inner tube.
By means of my invention, a very large amount of heating surface, with a small
quantity of steam or hot water is obtained, thus securing economy of fuel.
And in order that my said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawing, in which two
articulated portions of a coil are illustrated, the joints being shown loose for
greater clearness.
. a are the external cast tubes. are the internal wrought tubes. The
ends are made fluid tight in the internal flanges a', by expanding, coning, or
otherwise. The articulated portions of the coil are united by bolts and nuts ff,
for which holes ce are provided in the casting. ee are openings for the com-
munication and circulation of hot water or steam, the joints being made good by
elastic rings g. d d are holes for the entrance and exit of air; the upper part of
the coil being sometimes covered with an ornamental cap or cover, and the lower
part resting on the floor or on a base plate.
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 the construction of steam and hot water coils, the combination of a cast
external tube a and an internal tube, providing an annular space for the
reception and circulation of steam or hot water, substantially as hereinbefore
described and illustrated by the drawing.
2. The general construction, arrangement and combination of the several and
respective parts, together forming my improvements in the construction of steam
and hot water coils or radiators, substantially as hereinbefore described and
illustrated by the drawing.
Dated this 1st Santambar 1801
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.