Improvements in Mouth Whistles for Calls for the use of Policemen, Firemen, and others.
Year: 1890

page_text: Date of Application, 11th Sept., 1890
Complete Specification Left, 11th June, 1891-Accepted, 11th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Mouth Whistles for Calls for the use of Policemen,
Firemen, and others.
I, ALBERT HENRY BOTTEN, of 113 Grove Road, Victoria Park, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:-
:-
This invention has for its object improvements in mouth whistles or calls
producing loud sounds to be used by policemen, firemen, or others requiring such
signals.
For this purpose I employ a cylindrical or other shaped tube with a mouth
piece at one end and having a fixed disc or seat inside made of metal or other
suitable material. A number of slots or holes are formed in the fixed disc or seat
around the circumference or otherwise. Also upon the fixed disc or seat there is
another disc mounted, it is made of ebonite or other light material and it is centred
or pivotted so that it can rotate freely. In this moveable disc there are also a
number of slots or holes to correspond with those in the fixed disc or seat.
slots or holes in the two discs are angled in opposite directions so that when the air
is forced by the mouth through the tube and through the angled holes it causes
the wheel to rotate upon its centre with great velocity and the flow of air is thus
rendered rapidly intermittent whereby the loud sound or whistle above mentioned
is occasioned.
Dated this 11th day of September 1890
The
CARPMAEL & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Mouth Whistles or Calls for the use of Policemen,
Firemen, and others.
I, ALBERT HENRY BOTTEN of 113 Grove Road, Victoria Park, in the County
of Middlesex, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :---
This invention has for its object improvements in mouth whistles or calls
producing loud sounds to be used by policemen, firemen, or others requiring such
signals.
For this purpose I employ a cylindrical or other shaped tube with a mouth piece
at one end and having a fixed disc or seat inside made of metal or other suitable
material. A number of slots or holes are formed in the fixed disc or seat around
the circumference or otherwise. Also upon the fixed disc or seat there is another
disc mounted, it is made of ebonite or other light material and it is centred or
pivotted so that it can rotate freely. In this moveable disc there are also a number
The slots or
of slots or holes to correspond with those in the fixed disc or seat.
holes in the two discs are angled in opposite directions so that when the air is forced
by the mouth through the tube and through the angled holes it causes the wheel
to rotate upon its centre with great velocity and the flow of air is thus rendered
rapidly intermittent whereby the loud sound or whistle above mentioned is
occasioned.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section of a mouth whistle or call made in accordance
with my invention.
Figures 2 and 3 show the discs to a larger scale.
...a is a metal tube, it has a mouth piece a¹ at one end. a² is a wire loop to receive
a cord by which the whistle or call may be suspended. a³ a³ are stiffening rings.
6 is a disc fixed.within the tube a it is perforated in the manner shown by Figure 2,
which represents the face of. the disc remote from the mouth piece. In the centre
of the disc is a boss and into this a pivot b' is screwed. c is a frame piece attached
to the disc b or it might be to the walls of the tube. Into the cross bar of, the
frame c an àdjustable pivot d is screwed. e is a disc which I make preferably of
vulcanite, it is perforated in the manner indicated by Figure 3. In the centre of
the disc a pin el is fixed; it has at one end a recess to receive the point of the
pivot band at the other a point which is received into a cavity at the end of the
pivot piece d.
1
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 :-
A mouth whistle or call substantially as described and consisting of a tube a with
mouth piece a¹; a fixed perforated disc 6 within the tube and in close proximity
to the disc b another perforated disc e of vulcanite or like light material.so formed
and mounted that it can be rotated by air blown through the tube from the mouth
of the user of the instrument.
Dated this 11th day of June 1891.