Improvements in Reversing Valves, applicable to the Flues of Gas and other Furnaces.
Year: 1890

page_text: Date of Application, 29th Apr., 1890
Complete Specification Left, 27th Jan., 1891-Accepted, 28th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Reversing Valves, applicable to the Flues of Gas
and other Furnaces.
We, SAMSON Fox, of Leeds Forge, Leeds, in the County of York, Civil
Engineer, and THOMAS WILLIAMSON, of Lemington Hall, Newcastle-on-Tyne, in
the County of Northumberland, Engineer, do hereby declare the nature of this
invention to be as follows:-
According to our present invention we construct reversing valves of a rectangular
box-like form, the sides and transverse connecting parts being made hollow and in
separate pieces with recessed joints, & held together by suitable bolts & nuts.
The valve box casing we form in two parts with a space between, which forms a
water jacket all round, and is provided with inlet and outlet branch pipes, through
which water circulates continuously.
The valve tongue is made hollow and looking on end of a flat square, and in
cross section of an obtuse angle shape, the vertex of which is the axis on which the
valve turns on hollow trunnions in bearings formed in the valve box sides.
Suitable connections are provided by means of which water is allowed to circulate
freely through the hollow trunnions and valve tongue.
Hoods or casing provided with doors for the purpose of cleaning out and with
openings to admit the gas to the valve box, through which it passes to the furnace
flue are let into recesses formed at each end of the valve box and secured thereto by
bolts and cotters.
The operation of alternately reversing the gas inlet and the waste gas inlet and
the waste gas outlet is performed by means of a lever fixed to the trunnions of the
valve tongue.
At one side it forms the admission passage of the gas to the furnace and on the
other side it forms the exit passage for the waste gases to the chimney and vice-versu
when the valve is reversed.
COMPLETE SPECIFICATION.
Improvements in Reversing Valves, applicable to the Flues of Gas
and other Furnaces.
We, SAMSON Fox, of Leeds Forge, Leeds, in the County of York, Civil
Engineer, and THOMAS WILLIAMSON, of Lemington Hall, Newcastle-on-Tyne, in
the County of Northumberland, 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 reference to a construction of reversing valve applicable to
the flues of gas and other furnaces, in which the valve tongue, and the part of the
valve casing exposed to the action of hot gases and products of combustion passing
therethrough to a chimney, are made hollow, so that water can be caused to
circulate through them for the purpose of keeping them cool and preventing their
rapid destruction. The valve casing is made of rectangular box like form in cross
section, in separate pieces jointed together and firmly connected by bolts and
nuts.
In order that the invention may be readily understood we will proceed to
describe the same with reference to the accompanying drawings in which,
Fig. 1 is a longitudinal section;
Fig. 2 is a part plan and part horizontal section; and

page_text: Fig. 3 is a part end elevation and part cross section of a reversing valve con-
structed according to this invention.
Fig. 4 is a sectional detail view of a joint between one of the sides and transverse
connecting parts of the valve casing.
a is the valve tongue. consisting of two flat hollow rectangular flaps arranged at
an obtuse angle to each other, and provided with hollow trunnions a' by which it is.
supported within the valve casing so as to be capable of partial rotation therein.
To one of the trunnions is connected a lever, not shewn, by which the position of
the valve tongue can be reversed. a² a² are pipes connected to the hollow
trunnions a¹ by stuffing boxes a³ and by means of which water can be admitted to
and allowed to circulate continuously through the valve tongue. The top part of.
the casing is secured to the bottom part by bolts and cotters. The bottom part
of the valve casing which is of rectangular form in cross section and which is
exposed to the heat of hot gases and products of combustion passing to the chimney
when the apparatus is in use, consists of two hollow sides c c connected by hollow
transverse end and bottom pieces c c respectively. These parts c, c', c² are jointed
together as shewn and are held firmly in place by bolts d and nuts d' (see Fig. 4)
so that water can circulate continuously through them. e el arc inlet and outlet
pipes by means of which water is admitted to and allowed to escape from the hollow
sides, ends, and bottom of the valve casing. By the construction described a
passage or gas way e³ is formed between the hollow end and bottom connecting
pieces at each end of the valve casing and a passage c is formed between the
two hollow bottom pieces c², this latter passage serving to place the interior of the
valve casing in communication with a chimney.
fare hoods or end casings, each made with an opening at its lower side through
which gas or products of combustion, as the case may be, can pass to or from the
furnace flues. are bolts with cotters for securing the hoods or end casings f
to the sides of the valve casing which are recessed to receive them. are lids
secured to the top part of the casing and by removing which, the valve and the
interior of the casing can be examined. When the reversing valve is in position for
use, the openings in the bottoms of the hoods or casings ff are placed in communica-
tion with the flues leading to the furnace, and the passage c is placed in com-
munication with a chimney. Gas for combustion in the furnace enters the valve
casing past a mushroom lid or cover the position of which can be adjusted as
required to regulate the flow of gas. With the valve tongue a in the position
shewn in Fig. 1, the gas will flow downward in the direction shown by the arrows,
entering the furnace flue by way of the right hand end hood or casing f'; and the
products of combustion from the furnace will return through the other flue and pass
to the chimney by way of the left hand hood or casing the left hand lower portion
of the valve casing and the passage. When the position of the valve tongue a is
reversed, as indicated in dotted lines, the direction of the gas and products of
combustion to and from the furnace will be reversed as will be readily understood.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
A reversing valve for a gas or other furnace, in which the valve tongue and the
part of the valve casing exposed to the action of hot gases and products of
combustion are made hollow so that water can circulate through them, the sides,
ends and bottom of the valve casing being made in separate pieces connected
together substantially as described and shewn for the purpose specified.
Dated this 27th day of Tanaw 1901
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.