A New or Improved Whistle.
Year: 1894

page_text: Date of Application, 4th June, 1894.
Complete Specification Left, 19th Feb., 1895-Accepted, 30th Mar., 1895
PROVISIONAL SPECIFICATION.
A New or Improved Whistle.
We EDWARD LAWLEY PARKER, trading as Bent and Parker, of Harper's
Hill Works Northwood Street, Birmingham, in the County of Warwick,
Manufacturer, and WILLIAM WALLIS TWIGG, of Harper's Hill Works aforesaid,
Manager, do hereby declare the nature of this invention to be as follows:-
The said invention consists of a new or improved whistle the parts of which are
constructed and combined in the manner hereinafter described the said whistle being
of the kind commonly called a double whistle and used principally as an alarm
whistle by policemen, cyclists and others.
Our new or improved double whistle is constructed as follows. The barrel or
body of the whistle is situated and crosses at right angles the short tube constituting
the mouthpiece of the whistle the said mouthpiece being preferably flattened at its
outer end. The said mouthpiece tube enters and crosses the barrel or body near its
middle dividing the said body into two nearly equal parts the said two parts
constituting chambers of different lengths. The sail mouthpiece tube communicate's
with the two parts of the body by means of slits, concentric with the body, at the
side opposite to that at which the mouthpiece enters the body. We make in
the distant side of the body of the whistle two nearly semi-circular openings the
said openings being on either side of the two slits described by which the mouth-
piece communicates with the two parts of the body, the sail slits and semi-circular
openings together with the two parts of the body constituting two whistles of
slightly different pitch. We divide each part of the body on either side of the
mouthpiece by means of a diaphragm crossing the said body as a diameter the said
diaphragm extending to near the closed end of each whistle or part of the body,
the said diaphragms virtually doubling the length of the bodies of the whistles.
By the said invention a double whistle is produced which projects from the mouth
when in use only to an extent little greater than the diameter of the body of the
whistle and as the said body is in line with and partly covered by the lips the
danger of the whistle being knocked out of the mouth, as is frequently the case
with policemen's whistles of the ordinary construction, is almost wholly removed.
Further the said whistle is more readily held in the mouth and as the air openings
are in the distant side of the body there is no danger of their being obstructed by
the lips or moustache.
Dated this 4th dow of June 1894
W. T. WHITEMAN,
Agent for the Applicants.
A New or Improved whistle.
We, EDWARD LAWLEY PARKER, trading as Bent and Parker, of Harper's
Hill Works, Northwood Street, Birmingham, in the County of Warwick,
0 Manufacturer, and WILLIAM WALLIS TWIGG, of Harper's Hill Works, aforesaid
Manager, do hereby declare the nature of the said invention and in what manner
10271

page_text: the same is to be performed to be particularly described and ascertained in and.
by the following statement :-
The said invention consists of a new or improved whistle the parts of which are
constructed and combined in the manner hereinafter described, the said whistle
being of the kind commonly called a double whistle and used principally as au
alarm whistle by policemen, cyclists and others.
Our new or improved double whistle is constructed as follows. The barrel or
body of the whistle is situated and crosses at right angles the short tube constituting
the mouthpiece of the whistle, the said-mouthpiece being preferably flattened at
its outer end. The said mouthpiece tube enters and crosses the barrel or body
near its middle dividing the said body into two nearly equal parts, the said two
parts constituting chambers of different lengths. The said mouthpiece tube
communicates with the two parts of the body by means of slits, concentric with
the body, at the side opposite to that at which the mouthpiece enters the body.
We make in the distant side of the body of the whistle two nearly semi-circular
openings the said openings being on either side of the two slits described by
which the mouthpiece communicates with the two parts of the body; the said
slits and semi-circular openings together with the two parts of the body constituting
two whistles of slightly different pitch. We divide, each part of the body on
either side of the mouthpiece by means of a diaphragm crossing the said body
nearly as a diameter, the said diaphragm extending to near the closed end of each
whistle or part of the body, the said diaphragms virtually doubling the length of
the bodies of the whistles.
Figure 1 of the accompanying drawing represents in plan, Figure 2 in front
elevation (a portion being broken away) and Figure 3 in back elevation, all drawn
to a large scale, a double whistle constructed according to the said invention;
Figure 4 is a horizontal section of the same and Figure 5 is a cross section
through the middle of the double whistle.
The same letters of reference indicate the same parts in the several figures of
the drawing.
The
a is the flattened mouthpiece of the whistle entering the body or barrel bat or
Dear its middle. The middle portion of the body or barrel b is separated from the
ends by the discs c, cand constitutes a prolongation of the mouthpiece a or the air
receiving chamber of the whistle; the said air receiving chamber is marked a² in
Figure 4. The middle air receiving chamber a divides the body or barrel b into
two sounding chambers 62, 63, the said sounding chambers 2, 3 constituting two
whistles. The chamber 63 is of a slightly greater length than the chamber 62.
The air receiving chamber a communicates with the sounding chambers 62, 63
through the slits 2, at the distant side or end of the air receiving chamber a²
the air passing through the slits 2, 3 as indicated by the arrows in Figure 4.
openings d, d of the sounding chambers 62, 63 are situated at the distant side of the
said body or barrel 6 as will be seen by an examination of Figures 1, 3 and 4,
consequently the said openings are not in danger of being closed by the person
blowing the whistle. Each of the sounding chambers 62, 63 is divided longitudinally
by a diaphragm e extending from the air receiving chamber a² to near the end of
the said body or barrel b. By this means the length of the said sounding
chambers 2, is virtually doubled and a sound is produced similar to that which
would be produced by a body or barrel without diaphragms of double the length of
that shown is a ring by which the whistle is connected to a chain or other
attachment.
By the said invention a double whistle is produced which projects from the
mouth when in use only to an extent little greater than the diameter of the body
of the whistle and as the said body is in line with and is partly covered by th
lips the danger of the whistle being knocked out of the mouth, as is frequently
the case with policemen's whistles of the ordinary construction, is almost wholly
removed. Further, the said whistle is more readily held in the mouth and as the

page_text: air openings are in the distant side of the body there is no danger of their being
obstructed by the lips or moustache.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim as the said invention;-
A new or improved double whistle the parts of which are constructed and
arranged substantially as herein before described and illustrated in the accompanying
drawing, the said double whistle consisting of an air tube or mouthpiece entering
and crossing at a right angle the body or barrel of the whistle at or near its
middle, and dividing the said body or barrel into two sounding chambers preferably
of unequal length and divided longitudinally, the openings of the said chambers
being situated at the distant side of the whistle substantially as and for the
purpose herein before described and illustrated.
Dated the Sixteenth day of February 1895.
EDWARD LAWLEY PARKER.
WILLIAM WALLIS TWIGG.