IMPROVEMENTS IN ORGANS
Year: 1885

page_text: I, EDWARD HADLOW SUGGATE of 250 Marylebone Road in the Parish of
St. Marylebone in the County of Middlesex Organ Builder do hereby declare the
nature of my invention for IMPROVEMENTS IN ORGANS to be as follows:-
The first part of my invention relates to improvements in means for exhausting
the pneumatic lever and consists in the combination with any form of pneumatic
lever and suitable action of a short sliding tube to open the pallet or valve that
adınits compressed or attenuated air to the pneumatic lever This sliding tube is
so arranged that it passes through the chamber through which the air passes from
the pallet to inflate the pneumatic lever. The tube is closed at both ends and at
convenient points two holes or ports are made and are so arranged that when the
key is at rest and the pallet or valve consequently closed one of these holes is within
the chamber through which the air passes to the pneumatic lover and the other is
open to the external air whilst when the key is depressed both holes or ports are
within the chamber.
The effect is that when the key is depressed and compressed air is consequently
admitted there is no opening for it to escape and the pneumatic lever is inflated
but so soon as the key is released and the pallet closed an exhaust port is opened
for the escape of the compressed air through the sliding tube used to push open the
pallet or valve.
The second part of my invention consists in the combination with a pneumatic
lever of two superimposed slides for the supply and exhaust of a pneumatic lever
and so arranged that one slide serves the double purpose of both exhausting and
supplying the compressed air while a second slide is made to cover the holes or
ports in the first slide when the pneumatic lever has been inflated either entirely
or so far as may be necessary for the purpose for which it is required.
2

page_text: Improvements in Organs...
I, EDWARD HADLOW SUGGATE of 250 Marylebone Road, in the parish of
St. Marylebone, in the County of Middlesex, Organ-Builder 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:-
The first part of my invention relates to improvements in the means used for
exhausting the pneumatic lever, and consists in the combination with any form
of pneumatic lever and suitable action of a short sliding-tube to open the pallet or
valve that admits compressed or attenuated air to the pneumatic lever. The sliding
tube is so arranged that it passes through the chamber or channel through which
the air is admitted from the pallet to inflate the pneumatic lever. The tube may
take any convenient form, and is closed at both ends, and at suitable and convenient
positions are two holes or ports, so placed, that when the key is at rest, and the
pallet or valve consequently closed one of these holes or ports is within the chamber
through which the air admitted to the pallet passes to the pneumatic lever and the
other is open to the external air, whilst, when the key is depressed both holes or
'ports are within the chamber.
Referring to the drawings, in Fig. 1, A is the sliding tube constructed of some
suitable material preferably vulcanite. B & C are the holes or ports through which
the compressed air may escape. D is a lever by which the motion of the player's
'finger on the key is communicated to the pallet or valve F by the tracker E. G is
the chamber or channel through which the compressed air passes to the pneumatic
lever. His the wind-chest containing the supply of compressed air.
When the key is depressed, the sliding tube A is moved upwards a convenient
distance and opens the pallet or valve F; by the same movement the port C is
moved within the plate K through which it works, so that both B & C are within
the chamber or channel G.
:
The compressed air is thus able to pass to the pneumatic lever and to inflate it,
and it will, of course, remain so inflated so long as the key is depressed.
When the key is allowed to rise the pallet closes and the ports or holes B'& C
are now one within and one without the chamber G. The compressed air can thus
escape through the tube by B & C into the external air.
I do not limit myself to the exact position and proportion of the parts
as shown.
2
The valve or pallet may be kept closed by a spring and may take any convenient
form. The exhaust tube may be used to open the valve in any convenient
position.
The second part of my invention consists in the combination with a pneumatic
lever of two superimposed slides for the supply and exhaust of the pneumatic
lever, and so arranged that one slide serves the double purpose of both supplying
the compressed air to the lever, and allowing the air to exhaust or escape, while a
second slide is made to cover the holes or ports in the first slide when the pneu-
matic lever has been inflated either entirely or so far as may be necessary for the
purpose for which it is required.

page_text: These slides may be in the form of tubes working within one another and in an
outer case or of flat slides working upon one another and covered by blocks within
which are the wind ports for supply and exhaust.
Again referring to the drawings, Fig. 3 is a plan and Fig. 4 a section through the
line A B. C & D are the two slides of which C is attached directly to the
pneumatic lever or motor bellows above, while D is controlled either directly or
by suitable mechanism by the hand or foot of the performer. E is the supply port
for admission of compressed air, and F is the exhaust port. G is the channel or
groove by which the compressed air having passed the slides is admitted to the
motor.
It will be evident that if the slide D be moved in the direction indicated by
the arrow, compressed air will be admitted to the motor bellows or pneumatic
lever, and will inflate it in proportion to the movement of the slide D, since any
alteration of position of the pneumatic lever or motor bellows will produce a
corresponding movement of the slide C and the relative position of the two slides
will remain the same.
If, on the other hand, the slide D be withdrawn, the compressed air contained in
the motor bellows or pneumatic lever will be allowed to escape until the port is
closed by the consequent re-adjustment of the positions of the slides.
Any form of pneumatic lever or motor bellows may be employed, but I prefer to
use one with parallel ribs or their equivalent so that the slide C may be attached
directly and without the necessity for a parallel motion to keep it accurately in its
position.
Having particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:-
First. The use of a hollow tube or slide so constructed that the compressed or
attenuated air from a pneumatic lever may be exhausted through it, the same slide
for tube being used to open the valve and to allow the compressed or attenuated air
to escape through itself.
Secondly. The use of a hollow tube to exhaust a pneumatic lever substantially
as set forth.
Thirdly. The use of two slides and blocks or of hollow tubes passing over each
other to supply and exhaust a pneumatic lever substantially as set forth.
Dated this 22nd day of September 1886.
E. HADLOW SUGGATE.