Improvements in Appliances for Admitting Compressed Air to the Speaking Pipes of Organs.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Appliances for Admitting Compressed Air to the
Speaking Pipes of Organs.
I, CHARLES FREDERICK BRINDLEY, of Suffolk Road, in the City of Sheffield,
Organ Builder, do hereby declare the nature of my invention to be as follows:-
My invention relates to improvements in the appliances or means by which com-
pressed air is admitted from the channel or air chamber into the speaking pipes.
of an organ; and to the means of operating the valves.
In carrying out my invention I will describe the valve mechanism as applied to
one pipe only, first, premising that in the upper part of the wall of the air chamber
or channel, a duct or passage is made for the compressed air to pass to the speaking
pipe, and in the lower part of the wall, there is an opening communicating, with
an exhaust appliance of any suitable description.
The upper opening is closed by the valve, and the lower one is closed by a strip
or disc of leather which I call the motor disc, and which is raised a little way from
the wall by means of a frame of wood.
Between the two said openings I fix a standard to which the valve lever is
pivotted in or near to its centre; to its top end is fixed the valve to close the wind
duct to the speaking pipe, and through its lower end I pass a screwthreaded wire
provided with an adjusting nut.
The screwed wire also passes through the centre of the leather motor disc, and is
secured thereto by a nut upon the wire upon each side of the disc.
Between the valve and the fulcrum of the lever and near to the latter, I fix a
spring support, siv a piece of wire screwed into the wall and passing through a
slot in the lever, its free end provided with an adjusting nut.
A light bow spring provided with a central hole is passed over the said wire, with
its ends resting upon the valve lever at unequal distances from the fulcrum, and is
held against the lever by a nut upon the wire as before described.
The tendency of the spring is therefore. to close the valve, which.. is. its normal
condition; although the area of the motor disc is greater than..that of, the valve,
both of which are acted upon by the compressed air in the channel.
When the pipe is required to speak the exhaust is applied which draws down
the motor disc and the lower end of the lever and opens the valve:

page_text: Improvements in Appliances for Admitting Compressed Air to the
Speaking Pipes of Organe.
I, CHARLES FREDERICK BRINDLEY, of Suffolk Road, in the City of Sheffield,
Organ Builder, do hereby declare the nature of this invention and in what manner
the same has to be performed, to be particularly described and ascertained in and by
the following statement:-
My invention relates to improvements in the appliances or means by which com-
pressed air is admitted from the channel or air chamber into the speaking pipes of
an organ, and to the means of operating the valves.
11.
The annexed drawing clearly illustratés my invention, and will be referred to
in the following specification.
In carrying out my invention I will describe the valve mechanism as applied to
one pipe only, first premising that in the upper part of the wall of the air chamber
or channel W, a duct or passage A, is made for the compressed air to pass to the
speaking pipe at B, and in the lower part of the wall M, there is an opening N
communicating with an exhaust appliance of any suitable description.
:
The upper opening is closed by the valve C, and the lower one is closed by a
disc or strip of leather D, which I call the motor disc, and which is raised a short
distance from the wall by means of a frame of wood E.
.. + :
.
Between the two said openings, I fix a post or standard F, to which the valve
lever G, is pivotted in or near to its centre; to its top end is fixed the valve C, to
close the wind duct A, to the speaking pipe at B, by means of a screwthreaded
wire H, provided with an adjusting nut as shown.
Another screwed wire I, passes through the lever G and the centre of the motor
disc D, and is secured thereto by nuts upon the wire.
. L
Between the valve C, and the fulcrum of the lever F, and near to the latter, I
fix a support K for a spring L, a simple construction of support being a piece of
screwthreaded wire secured to the wall M, and passing through an elongated.
slot in the lever G, its free end being provided with an adjusting nut to regulate
the power of the spring.
A light bow spring L, provided with a hole is passed over the wire K, with its
ends resting upon the valve lever G, at unequal distances from the fulcrum F, and
is pressed against the lever by the beforementioned adjusting nut upon the wire K.
The tendency of the spring L, is therefore to close the valve C, which is its normal
condition, although the area of the motor disc D), is greater than that of the valve,
both being subject to the pressure of the compressed air in the channel W.
When the pipe at B, is required to speak, the exhaust is applied to the opening N,
under the motor disc, the pressure of the compressed air in chamber W, upon the
larger disc D, overpowers the pressure upon the valve C, and the spring L, forces:
down the motor disc and opens the valve C to the speaking pipe.
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,
1-The arrangement of mechanism for admitting compressed air to the speak-
ing pipes of organs as herein before described and shown."
2-In mechanism for admitting compressed air to the speaking pipes of organs,
a valve C; a motor disc D, of larger diameter, connected with the valve by means
of a pivotted lever G; a spring L, acting upon the lever so as to keep the valve

page_text: closed, the underside of the motor disc being open to an exhaust action, arranged
substantially as hereinbefore described and set forth.
Dated the 1st day of March 1898.
ROBT. F. DRURY, C.P.A.,
Agent for Applicant.