Year: 1885

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Engineer do hereby declare the nature of this invention (a communication from
Wade Buckley of Easton, Pennsylvania, United States of America) a d in what
manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement:―
This invention relates to certain improvements in cornets and other wind instru-
ments of that class, and it has for its objects to provide for readily, rapidly and
conveniently changing the pitch of said instruments as occasion may require,
whereby the necessary change of pitch in any ordinary instrument may be made
by the musician as more fully hereinafter specified.
These objects are attained by the means illustrated in the accompanying
drawings in which
Figure 1 represents a side elevation of this improved device, with the parts
arranged to produce the highest pitch.
Figure 2 a similar view with the parts arranged to produce the lowest pitch.
Figure 3 a detached view of a lock latch to secure the parts when arranged for
the low pitch and
Figure 4 a view of a cornet showing this invention applied thereto.
The letter A indicates a tube of suitable length, the lower end of which is
provided with a tapered projection B adapted to fit in the forward end of the
cornet tube, in the place of the ordinary crooks of the instrument. Within said
tube is accurately fitted a tube of smaller diameter which is adapted to slide in the
outer tube. The said inner tube at its outer end is provided with a cross cap C.
From the extending lateral arms D of the same project the longitudinal guide
bars E, which pass through a similar cross cap F on the upper end of the outer tube
before mentioned.
These guide bars at their lower ends are provided with stops or studs G which
limit the movements of the parts, so as to change the pitch from A natural to B flat
or vice versa. To the outer lower end of the outer tube is secured a spring H which

page_text: serves to lock the two tubes, when drawn out to their fullest extent, and which can
be manipulated by a lug I in order to change the parts when desired.
In operation this device is placed in the position of the ordinary mouth piece of
the cornet, and the ordinary mouth piece of the same placed in the upper section of
the device.
When required to change the pitch of the instrument it will be seen that
the attachment has only to be lengthened or contracted.
It will be further seen that the attachment may be applied to any cornet or
other similar wind instrument without alteration to the same, thus obviating the
objections heretofore experienced.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is
1st The combination with the inner and outer tubes of the attachment adapted
to be secured to the forward end of the tube of a cornet, of the guide rods, and the
stops at their ends to limit the movement of the respective tubes, substantially as
and for the purposes specified.
2nd The combination with the sliding tubes and the guide rods of the lock spring
or latch whereby the two are held in proper relative positions substantially as and
for the purposes specified.