Improvements in or relating to Slide Trombones.
Year: 1897

page_text: Date of Application, 1st May, 1897
Complete Specification Left, 1st-Feb., 1898-Accepted, 5th Mar.,
1898.
PROVISIONAL SPECIFICATION.
Improvements in or relating to Slide Trombones.
We, JAMES HERBERT GUILMARTIN, of 203, Hampstead Road, London, N.W.,
Musician, and BESSON AND COMPANY LIMITED, of 198, Euston Road, London,
Manufacturers of Musical Instruments, do hereby declare the nature of this
invention to be as follows:-
This invention relates to slide trombones and has for its object to enable the
player to produce with certainty a particular note perfectly in tune the said
note having hitherto been defective or difficult to produce with certainty.
According to this invention the slide tubes when they reach the home position
come against suitable springs or spring buffers or equivalent or other suitable
devices which-when pressure is applied to the slide tubes by the player-will
"give" and thus permit the said slide tubes to be moved further inwards and
thereby shorten the tubing and consequently having the effect of sharpening the
pitch of the instrument. Thus the upper A flat on the instrument which is known
as the
wolf" or conspicuously imperfect note of this instrument is obtained
without hesitation and with absolute certainty and in perfect tune-this being a
great advantage to trombone players.
<<
The aforesaid springs or spring arrangement may be of any suitable character
and arranged and mounted in any manner adapted for the purpose and may
advantageously be enclosed in ferrules or encased in any suitable manner.
Obviously the springs or equivalent may be mounted on the slide tubes instead
of on the inner or fixed tubes or both if desired.
Paw
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.
Improvements in or relating to Slide Trombones.
We, JAMES HERBERT GULLMARTIN, of 203, Hampstead Road, London, N.W.,
Musician, and BESSON AND COMPANY LIMITED, of 198, Euston Road, London,
Manufacturers of Musical Instruments, 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 fellowing statement:-
This invention relates to slide trombones and has for its object to enable the
player to produce with certainty a particular note perfectly in tune the said
Dote having hitherto been defective or difficult to produce with certainty.

page_text: According to this invention the slide tubes when they reach the home position
come against suitable springs or spring buffers or equivalent or other suitable
devices which when pressure is applied to the slide tubes by the player-will
"give" and thus permit the said slide tubes to be moved further inwards and
thereby shorten the tubing and consequently having the effect of sharpening the
pitch of the instrument. Thus the upper A flat of the instrument which is known
as the "wolf" or conspicuously imperfect note of this instrument is obtained
without hesitation and with absolute certainty and in perfect tune-this being a
great advantage to trombone players.
The aforesaid springs or spring arrangement may be of any suitable character
and arranged and mounted in any manner adapted for the purpose and may
advantageously be enclosed in ferrules or encased in any suitable manner.
Obviously the springs or equivalent may be mounted on the slide tubes instead
of on the inner or fixed tubes or both if desired..
Referring to the accompanying drawings:-
:―
Fig. 1 is a local longitudinal view partly in section showing the manner of
applying this invention to a slide trombone.
Fig. 2 shows the spring arrangement compressed by the slide tube.
Fig. 3 is a cross section on the line 3-3 Fig. 2.
a is the slide tube the inner end a¹ of which comes against a sliding collar b
encircling and loosely fitting the fixed tube c of the instrument.
d is a spring (advantageously affixed at one end to the said sliding collar b)
loosely fitting the tube while the inner end of said spring rests against a fixed
stop or abutment e on the fixed tube c.
f is a short length of tube of larger diameter than either the tubes c and a such
short length of tube f at its inner end f¹ fitting over the abutment e or otherwise
suitably fixed or held concentric with the said tubes a and c so as to thus form an
annular chamber in which the spring d is held and permitting the slide tube a to
freely slide within and between said casing f and the inner tube c.
This spring or spring buffer or equivalent is provided for both the slide tubes.
It will thus readily be seen that when the slide tubes a reach the home position
as shown in Fig. 1 they come against said spring or spring buffers and when
pressure is applied to the slide tubes by the player thereby the slide tubes can be
moved further inwards into say the position shown in Fig. 2 and thereby the
aforesaid object of the present invention is attained.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what we
claim is:-
1. In slide trombones-the combination of springs or spring buffers interposed
between the inner end of the slide tubes and the fixed tubes in suchwise that when
the slide tubes reach the home position they may then be pressed by the player
further inwards substantially as and for the purposes described.
2. The improved construction of slide trombones arranged and operating
substantially in the manner and for the purposes hereinbefore described.
1000
-day-
1000
1000.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicants.