Gas and Air Reversing Valve for Regenerative Furnaces.
Year: 1890

page_text: Date of Application, 31st Mar., 1890
Complete Specification Left, 13th Nov., 1890-Accepted, 3rd Jan., 1891
PROVISIONAL SPECIFICATION.
Gas and Air Reversing Valve for Regenerative Furnaces.
WILLIAM SCOTSON, 78 Stafford Street, Wednesbury, Engineer, do hereby declare the
nature of this invention to be as follows :—
A modification of the ordinary gas and air reversing valves for regenerative
furnaces.
In the ordinary type of valve the case consists of a vertical cylinder in which the
butterfly valve is swung on a spindle and oval openings are made in opposite sides
of case opposite the butterfly, which openings lead to each end of the furnace
respectively. The upper end of the vertical cylinder is connected with the gas
supply and the bottom end of it with the chimney flue thus forming a four way valve
for reversing the gas or air supply to the furnace and the draught from the furnace
at the same time.
The proposed modification and nature of this invention is as follows:-
The valve case consists of a horizontal cylindrical instead of a vertical cylindrical
case, into which the butterfly is fitted and swung.
The gas passage is cast on the upper side and the chimney flue passage on the
under side. The ends of the horizontal valve case are connected to the gas flues
with suitable connections.
The connections at each end of the horizontal valve case are fitted with readily
removeable covers, hoods openings or doors of ample size for withdrawing the
butterfly in case it becomes warped, burnt, or otherwise damaged, and fitting therein
a duplicate butterfly and spindle in the time usually at disposal between the heats of
the furnace and without stopping the working of the furnace.
The new position of valve affords also great facility for ordinary inspection, by
means of hand holes cast in the connections fitted on the horizontal valve case, and
for cleaning the upper side of the butterfly by scrapers through these hand holes
when necessary.
COMPLETE SPECIFICATION.
Gas and Air Reversing Valve for Regenerative Furnaces.
WILLIAM SCOTSON, 78 Stafford Street, Wednesbury, 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 :-
A modification of the ordinary gas and air reversing valve for regenerative
furnaces. In the ordinary type of valve the case consists of a vertical cylinder in
which the butterfly valve is swung on a spindle and oval openings are made in
opposite sides of case & opposite the butterfly valve, which openings lead to each end
of the furnace respectively, the upper end of the vertical cylindrical case being con-
nected with the gas supply tube, and the bottom end with the draught flue, thus
forming a four way valve for connecting the gas (or air) supply to the furnace at one
end, and the draught opening from opposite end of furnace through the valve case
to draught flue and reversing the same by turning the butterfly valve in its case.
The proposed modification and nature of this invention is as follows :-
The valve case consists of a horizontal cylinder marked A on drawing (instead of
a vertical cylinder) into which the butterfly valve is filled and swung.
The gas passage, marked B on drawing, is cast on the upper side of the case, and

page_text: the draught flue passage, marked C on drawing, is cast on the under side. The
ends of the horizontal case are connected to the gas flues, marked E on drawing,
with hoods, marked D on drawing, or with other suitable connections made in one
piece each as shewn on drawing, or in one or more pieces if found preferable. Any
modification of the hoods, making each in one or more pieces, one being permanently
fixed & secured to the horizontal case and the other readily removeable, may be used.
Thus the hood may be wholly removed or only in part as may be required for the
purpose of examination, removal of butterfly valve &c.
The new arrangement of horizontal instead of vertical case has for its object :-
1stly. The removal of a defective butterfly when it is warped, cracked, burnt, or
otherwise damaged and replacing same with a duplicate one without displacing any
part of valve or connections except one of the hoods or part of one of the hoods.
For this purpose the cases are accurately bored for the butterfly valve and cross
bored for the spindle. The spindle on which the butterfly is swung is fitted into
bored recesses in the butterfly so that any butterfly will fit into any case for the same
size of valve, & so be perfectly interchangeable.
2ndly. The new position of valve affords great facility for ordinary inspection by
means of hand holes cast in the hoods so that the whole of the edge and bearing
surface of the butterfly can be thoroughly examined.
3rdly. The case & valve can be thoroughly cleansed with scrapers through the hand
holes cast in the hoods.
.
4thly. The passages are of full area throughout and not contracted by the butterfly
as in the ordinary type of valve with vertical case & side openings.. This arrange-
ment gives 30 per cent. more area of passage than the ordinary type.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed 1 declare that what I
claim is
1. The use of a horizontal cylindrical case in which the butterfly valve is swung &
fitted. The gas (or air) port being cast on the upper side of the said case, and the
draught flue passage on the under and opposite side. The ends of the horizontal case
are connected up to the passages leading to each end of the furnace respectively by
hoods (each of which may be in one or more parts as may hereafter be determined).
Dated this 12th day of November 1890.
WILLIAM SCOTSON.