Improvements in Furnace Reversing Valves.
Year: 1891

page_text: Date of Application, 8th June, 1891
Complete Specification Left, 7th Mar., 1892-Accepted, 9th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Furnace Reversing Valves.
I, BRIERLEY DENHAM HEALEY of Bamber Bridge in the County of Lancaster,
Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
In the Specification of Patent No. 1788, granted to me in 1873, 1 described a
new system of reversing the currents of air and gas passing to and from regenerative
furnaces, which comprised the use of four mushroom or pot valves each having its.
own seating.
According to my present invention, instead of placing the two lower valves so
that their spindles pass clear of the seats of the upper valves, I now place the
lower valves so that their centres coincide vertically with the centres of the upper
valves.
The upper valves are still made about 3 inches larger than the lower valves, so.
that the lower valves will pass through the upper seats, and when the upper seats.
are removed the lower seats will pass through the upper seat gaps.
The levers which carry the upper valves are placed on each side of the inlet tube,
and their ends meet in sectors which carry adjustable links or chains, the latter
being coupled to the sockets of the spindles.
The lower valves are carried by short levers within their boxes, which levers are
operated by other short levers outside the casings, by means of cross spindles with
squares on them, and these onter levers have each a sector which gears into a
central pinion or double sector.
The valve levers which carry the usual counterweights are operated at one and
the same time by rods which connect them to the main reversing lever, so that
when the latter is reversed the right hand upper valve may be up at the same.
time the left hand lower valve is up, and the opposite valves will be close.
down.
These valves balance each other and are kept in contact with their seats, so that
the seats do not require bolting down to the bedplates or casings.
I prefer to make the whole of the parts of steel, but the bedplates may be of cast.
iron, as also some of the hand hole covers.
Dated this 6th day of June 1891.
B. D. HEALEY,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Furnace Reversing Valves.
I, BRIERLEY DENHAM HEALEY of Bamber Bridge in the County of Lancaster,
Civil 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:-
In the Specification of Patent No. 1788, granted to me in 1873, I described a
new system of reversing the currents of air and gas passing to and from regenerative
furnaces, which comprised the use of four mushroom or pot valves each having its
own seating.
According to my present invention, instead of placing the two lower valves so
that their spindles pass clear of the seats of the upper valves, I now place the
lower valves so that their centres coincide vertically with the centres of the upper
valves.

page_text: will now describe it in
And in order that this invention may be understood
reference to the two sheets of drawings which are appended hereto.
Sheet 1 shews a section and two half plans, one at A. B. and the other at C. D.
of the valves as built with sectors for the lower valves.
Sheet 2 shews a section and two half plans, one at A. B. and the other at C. D.
of a modification in which there are two sets of rocking levers F.
The upper valves A are still made about 3 inches larger than the lower valves M
so that the lower valves will pass through the upper seats U, and when the upper
seats are removed the lower seats V will pass through the upper seat gaps.
The levers F which carry the upper valves are placed on each side of the inlet
tube, and their ends meet in sectors D which carry adjustable links or chains E, the
latter being.coupled to the sockets C, of the spindles B.
The lower valves M are carried by short levers N within their boxes P, which
levers are operated by other short levers outside the casings by means of cross
spindles with squares on them, and these outer levers have each a sector O, which
gears into a central pinion or double sector R.
The valve levers L and H which carry the usual counterweights are operated at
one and the same time by rods J and K which connect them to the main reversing
lever, so that when the latter is reversed the right hand upper valve may be up at
the same time the left hand lower valve is up, and the opposite valves will be close
down as shewn on drawings appended hereto.
These valves balance each other and are kept in contact with their seats, so that
the seats do not require bolting down to the bed plates Z or casings.
I prefer to make the whole of the parts of steel, but the bedplates Z may be. of
cast iron, as also the hand hole covers W and X.
The master valve G. is set in the gas box and operated as usual.
Bridges of fire-resisting material Y are built for protecting the bedplates Z.
The main flue to chimney is represented by T, and the flues to the furnace
chambers by S.
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 1
claim is:
Constructing and using valves for reversing the currents of air and gas passing
to and from regenerative furnaces substantially as herein shewn and described.
'
Dated this 5th day of March 1892.
B. D. HEALEY.