AN IMPROVED WIND VALVE OR PALLET FOR ORGANS
Year: 1885

page_text: I ARTHUR SAMUEL HAMAND of Palace Chambers, Bridge Street, Westminster,
in the County of Middlesex, Member of the Institution of Civil Engineers, do
hereby declare the nature of my invention for AN IMPROVED WIND VALVE OR
PALLET FOR ORGANS to be as follows:-
The invention consists of a valve chamber having two apertures and valve seats
at opposite sides, which apertures are covered by two valves or pallets rigidly
connected together by a spindle which maintains them at the required distance
apart, and to which the connection for operating the valve is attached. One of the
valves is made of greater area than the other and they are so arranged that one
valve seats inside, and the other outside, the valve chamber. The valves are
therefore nearly balanced, the additional area of one valve being only enough to
keep the valves properly closed. The valve chamber is placed in the wind chest,
opening into the groove in the ordinary way.
This arrangement obviates the necessity of using pneumatic action for opening
the wind valves.

page_text: Improved Wind Valve or Pallet for Organs.
I, ARTHUR SAMUEL HAMAND of Palace Chambers Bridge Street Westminster in
the County of Middlesex Civil Engineer do hereby declare the nature of my
invention for AN IMPROVED WIND VALVE OR PALLET FOR ORGANS and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
The invention consists of a valve chamber, of preferably rectangular shape,
having two apertures with valve seats at opposite sides of the chamber, which
apertures are covered by two valves or pallets rigidly connected by one spindle
which maintains them at the required distance apart, and to which the connection
for operating the valve is attached. One of the valves is made of greater area than
the other, and they are so arranged that one valve seats inside, and the other
outside, the valve chamber. The valves are therefore nearly balanced, the
additional area of the larger valve being only enough to keep the valves properly
closed when shut. The valve chamber is placed in the wind chest, with a suitable
opening out of one side of the chamber (lying between the valves) leading thence
into the pipe groove, and the valve chamber may be fixed in any position, a spring
being used to close the valve in the ordinary way.
This arrangement obviates the necessity of employing pneumatic, or other
auxiliary, action for opening the wind valves and at same time permits a free
passage for the wind, with a smaller movement of the valve, effected with the least
possible effort.
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
The construction of an improved wind valve for Organs, consisting of a valve
chamber having two valves on opposite sides of it; connected and actuated by one
and the same spindle, so arranged that one valve opens inwardly, and the other
outwardly, as regards the chamber; the areas of the two valve openings being so
differentiated that the surplus area of one over the other is sufficient only to keep
the valves perfectly closed when shut.
Dated this nineteenth day of February 1000