Improvements in Band Stands or similar Erections.
Year: 1899

page_text: Date of Application, 4th Sept., 1899
Complete Specification Left, 28th Apr.. 1900—Accepted, 23rd June, 1900
PROVISIONAL SPECIFICATION.
Improvements in Band Stands or similar Erections.
I, HENRY HARDIN SPITTAL, Wright and Builder, 93, John Street, Glasgow, do
hereby declare the nature of this invention to be as follows;-
-
The principle of the parabolic curve is applied in the construction of the
ceiling canopy or soffit and the bottom or sole of the band stand or similar erection
and in the determination of the positions of the instrumentalists or vocalists
relative thereto. The surfaces of soffit and sole are constructed in curves generated
by segments of the parabolic curve either conically or pyramidally and so
arranged that the loci of the foci of the curves in every direction are the approxi-
mate loci of the sources of the sound-waves produced within the band-stand or
other erection whereby the maximum of sound is directed outwards in wave
lines of generally horizontal direction and the great loss of sound at present
caused by the rebounding of the sound-waves from soffit to sole and vice versa is
obviated or reduced to a minimum.
In the accompanying drawings, Sheet No. 1 shows sectional elevation of one
particular type or band stand to which the proposed improvements are applied.
In Sheet No. 2, the upper figure shows plan of soffit and the lower figure plan of
sole of said bandstand.
In both sheets, the letters A A, indicate surface of soffit: B B, surface of sole;
V, ventilator through soffit; and D, floor of bandstand.
In Sheet No. 1, C C indicates section of soffit and C, C¹, section of sole.
P indicates plane of the loci of the foci of the various parabolic curves applicable
to such a bandstand. F is the focus of each of the two parabolic curves shown
in the drawing (viz.:-that of which the soffit curve is a segment and that of
which the sole curve is a segment) X indicates axis of soffit curve and X axis of
sole curve. R, R¹, R", R, &c. indicate direction of rays of sound.
On Sheet No. 2, L L represents the locus of the foci of the two parabolic curves
shown in the drawing.
Glascow Dated this 22nd day of Santember 1000
Improvements in Band Stands or similar Erections.
I, HENRY HARDIN SPITTAL, Wright and Builder, 93, John Street, Glasgow, 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 follow-
ing statement:-
L
A
1
T .

page_text: ceiling canopy or soffit and the bottom or sole of the band stand or similar erection
and in the determination of the positions of the instrumentalists or vocalists
relative thereto. The surfaces of soffit or sole are constructed in curves generated
by segments of the parabolic curve either conically or pyramidally and so
arranged that the loci of the foci of the curves in every direction are the approxi-
mate loci of the sources of the sound-waves produced within the band stand or
other erection all as shown in the drawings lodged with my Provisional Specifica-
tion to which I hereby refer, viz.:-elevation and plans in 2 Sheets dated
4 September 1899, Number 17814.
In these drawings, Sheet No. 1 shows sectional elevation of one particular
type of band stand to which the proposed improvements are applied. In Sheet
No. 2, the upper figure shows plan of soffit and the lower figure plan of sole of
said bandstand.
In both sheets, the letters A A, indicate surface of soffit; B B, surface of sole;
V, ventilator through soffit; and D, floor of bandstand.
In Sheet No. 1, C C indicates section of soffit and C" C¹, section of sole.
P indicates plane of the loci of the foci of the various parabolic curves applicable
to such a bandstand. F is the focus of each of the two parabolic curves shown
in the drawing (riz:-that of which the soffit curve is a segment and that of
which the sole curve is a segment) X indicates axis of soffit curve and X axis of
sole curve. R, R¹, R", Rui, &c. indicate direction of rays of sound.
On Sheet No. 2, L L represents the locus of the foci of the two parabolic curves
shown in the drawing.
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
That my said invention constitutes improvements in band stands or similar
erections by the new and useful application thereto of the principle of the para-
bolic curve so that discords are prevented the maximum of sound is directed
outwards in wave lines of generally horizontal direction and the great loss of
sound at present caused by the rebounding of sound waves from soffit to sole and
vice versa is obviated or reduced to a minimum.
Dated this Twenty-sixth day of April 1900.