Year: 1887

page_text: Date of Application, 2nd May, 1887
Complete Left, 2nd Feb., 1888
Complete Accepted, 23rd Mar, 1888
We, WILLIAM WHITEHEAD of 36 Argyle Street, Gateshead on Tyne, Engineer,
and ALFRED EMLEY of 42 and 44 Westgate Road, Newcastle on Tyne, Ironmonger,
do hereby declare the nature of this invention to be as follows :-
This invention relates especially to hot water boilers.
:-
We employ pipes of triangular section which are twisted so that their edges form
helices.
The tubes are carried across the fire space, or flue of the boiler but rest centrally
and at the same time slant upwards. The amount of twist given to them is so
regulated that one angle of the triangle always points to the axis of the fire space or
flue. We find that the flame has a tendency to lick around the spiral screw-like
pipes and we thereby obtain a very large heating effect.
CARPMAEL & Co.,
Agents for the Applicants.

page_text: COMA DELE DIMITIVATION.
Improvements in Boilers.
We WILLIAM WHITEHEAD of 36 Argyle Street, Gateshead-on-Tyne in the County
of Durham, engineer, and ALFRED EMLEY of 42 and 44 Westgate Road, Newcastle-
on-Tyne, in the County of Northumberland, ironmonger, 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 especially to hot water boilers.
We employ pipes of triangular section which are twisted so that their edges form
helices.
The Tubes are carried across the fire-space or flue of the boiler but rest centrally
and at the same time slant upwards. The amount of twist given to them is so
regulated that one angle of the triangle always points to the axis of the fire space or
flue. We find that the flame has a tendency to lick around the spiral screw-like pipes
and we thereby obtain a very large heating effect.
Fig. 1 of the accompanying drawings shows two half-plans of the vertical type of
an improved boiler according to our invention, the upper portion of the drawing
showing an half-plan of the cover, the lower portion showing an half-plan with the
cover removed.
Fig. 2 shows an half elevation and half sectional elevation of an improved boiler
according to our invention and in Fig. 3 the upper half of the drawing shows a
section on line B B of fig. 2, the lower right and left quadrants of the drawing
showing respectively sections on lines D D and CC of fig. 2. Fig. 4 is a plan of a
pipe according to our invention.
Throughout this description similar letters of reference designate corresponding
.parts.
a is the fire-grate arranged to be supplied with fuel through fire-door b.
The bars c of the grate rest on a projection c¹ of the hollow cast iron ring d which
has enclosed sides and bottom, but its upper surface is arranged with holes into which
the bottom ends of the circulating pipes e are fitted preferably by rust joints though`
flanged, screwed, or other suitable joints can of course be adopted. The upper ends
of the pipes e are similarly fitted into holes or recesses in the hollow cast iron ring f
which is furnished with a plate or door g for the purpose of checking the flame and
heated products of combustion and causing them to lick around the spiral screw-like
pipes e.
A casing which may be of cast or sheet iron or firebrick or both is arranged to
encircle the whole, which thus economises the heat and causes the flame and products
of combustion to pass up into the space i of the cover k from which they issue
through opening and pipe m into the chimney-stack and atmosphere.
n is the flow-pipe and o is the return arranged in the usual way and when in
action the whole of the water spaces of the rings d and f and pipes e are full
of water which circulates through flow-pipe n and return-pipe o in the usual way.

page_text: The ring d is preferably cast of the section shown in fig. 2 for the double purpose
of affording a suitable resting surface on the masonry-support P or if desired the
boiler may be carried on short cast metal or fire brick supports for the purpose of more
evenly distributing the air supply to the grate. At a point in the circumference of
the lower portion of the ring d we place a door giving access to the grate-surface
for stoking cleaning and other like purposes.
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed we declare that what
we claim is :
1. In Boilers the combination with the use of pipes having a substantially triangular
section of the method of obtaining a very large heating effect by so twisting the
pipes that their edges form helices substantially in the manner hereinbefore described
and illustrated.
2. In Boilers, the combination with the use of pipes having a substantially triangular
section of the method of obtaining a very large heating effect by so arranging the
helices of the pipes that one angle of the triangle shall always point to the axis of
the firespace or flue substantially as herein before set forth.
Dated this 1st day of February 1888.1
A. CRAWHALL CHAPMAN,
2, St. Nicholas' Buildings, Newcastle-on-Tyne,
Agent for Applicants.