Improvements in and relating to Whistles.
Year: 1898

page_text: Date of Application, 16th Sept., 1898-Accepted, 29th Oct., 1898
Improvements in and relating to Whistles.
I, JOSEPH HUDSON, (trading as J. Hudson & Company), of Barr Street, in the City
of Birmingham, Warwickshire, Manufacturer, 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 following statement:-
My invention relates to whistles of the type in which two orifices are employed
through which air may be blown to impinge upon two edges and commonly known
as police or duplex whistles. Hitherto in whistles of this class the diaphragm
employed was merely soldered to the barrel of the whistle along its edges which
but weakly and insecurely fastened the diaphragm in position, and in order more
securely to fasten the diaphragm within the barrel of the whistle the diaphragm
has been secured therein by means of lugs provided upon the diaphragm which
were soldered upon the interior of the barrel. It is the object of my invention,
while employing a disc securely fastened in the barrel of the whistle, to employ the
lugs by means of which it is secured to strengthen the barrel at that part where the
slots are formed.
The invention consists in an improved construction of such whistles whereby the
barrel is enforced or strengthened in its weakest parts and by providing such
construction of the whistle as to secure neatness and economy of production.
The invention is illustrated in the accompanying drawings in which,
Figures 1 to 2 are detailed views, and
Figure 3 is a sectional elevation of a complete whistle in which the parts
illustrated in Figures 1 to 2 are assembled and secured, and
Figure 4 is a further sectional elevation taken on the line x y Figure 3.
In the provision of a whistle according to the invention a tube or barrel d of
brass or other suitable metal is taken and transverse slots e e are provided therein as
illustrated in Figures 3 and 4. The diaphragm a is secured within this barrel or
tube & so that its lateral lugs 6 shall bear against the connecting parts ƒ left on each
side of the tube on the formation of the transverse slots ee; and by being
soldered thereto the tube is enforced or strengthened at those parts. The
central axial diaphragm c and the diaphragm a are connected together as shown in
Figures 1 and 2 by the insertion of its extremity within slots a¹ provided in each
of the lateral lugs 6 and are introduced together into the interior of the tube or
barrel d preferably from the extremity d into the position indicated in Figures 3
and 4 and the lugs b are soldered to the sides of the barrel or tube. The
diaphragm a is of course so shaped as to leave orifices g through which air may be
blown so as to impinge upon the opposite edges of the slots e.
A mouthpiece or nozzle h is provided upon the extremity d¹ of the tube or barrel d
and a cover and connecting piece i is provided upon the opposite extremity d² as
illustrated in Figure 4 and each part hand i is preferably soldered to the barrel or
tube and a complete whistle is so formed.
I do not limit my invention to any particular means of connection of the axial
diaphragm c to the diaphragm a.

page_text: 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 :-
1. In a whistle of the type hereinbefore specified the provision of a diaphragm
having lugs formed thereon by means of which it is secured in position within the
barrel or tube in such a manner as to enforce or strengthen the tube at those parts
weakened by the provision of the transverse slots substantially as described.
2. In a whistle of the type herein before specified the provision of a diaphragm
secured to the interior of the barrel or tube and of an axial diaphragm secured
thereto and within the tube, substantially as herein before described.
3. A whistle constructed as herein before described and illustrated.
Dated this 16th day of September 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.