An Improved Blow Pipe.
Year: 1892

page_text: Date of Application, 3rd June, 1892
Complete Specification Left, 28th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Blow Pipe.
I, FREDERICK HARDING BEIRNE, of Charles Street, Wrexham, in the County
of Denbigh, Watchmaker do hereby declare the nature of this invention to be as
follows:-
This invention relates to what I term a self-acting blow-pipe chiefly for the use
of jewellers dentists and plumbers.
In carrying out my invention I apply to an ordinary blow-pipe an india-rubber
bag and provide the pipe with a valve opening outwards so that if air be blown into
the pipe the bag will be inflated and as the bag contracts the air will be forced
into the pipe through holes made therein and out through the nozzle. A plug is
fixed in the pipe between the valve and the said holes so as to prevent the air
passing direct from the mouth-piece down the pipe, or back from the bag through
the mouth-piece.
Dated the 3rd day of June 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Blow Pipe.
I, FREDERICK HARDING BEIRNE, of Charles Street, Wrexham, in the County
of Denbigh, Watchmaker, 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 :-
This invention relates to what I term a self-acting blow-pipe chiefly for the use
of jewellers and plumbers.
In carrying out my invention I apply to an ordinary blow-pipe a bag of india-
rubber or other elastic material and provide the pipe with a valve opening outwards
so that if air be blown into the pipe the bag will be inflated and as the bag contracts
the air will be forced into the pipe through holes made therein and out through the
nozzle. A plug is fixed in the pipe between the valve and the said holes so as to
prevent the air passing direct from the mouth-piece down the pipe, or back from
the bag through the mouth-piece.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of my improved blow-pipe; and,
Figure 2 is a longitudinal section of the same:
Figure 3 is a section on the line 3-3, Figure 2.
a is the ordinary blow-pipe, and b is the bag of india-rubber or other elastic
material which surrounds the same and which is inflated through the hole c and
deflates through the holes d, d. e is the plug which is placed in the tube to prevent
the air from passing directly through the same without entering the india-rubber
bag. is the valve which is placed over the hole c and which allows the air to
enter the bag but prevents the return of the same to the mouth.
By the use of a blow-pipe constructed as described I am enabled to obtain a
uniform current of air notwithstanding the fact that the blowing may be more or
less irregular.

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. A blow-pipe having in combination with it an elastic bag into which the air
enters before passing to the nozzle, a valve being placed in the said bag for pre-
venting the return of the air therefrom into the mouth, substantially as described.
2. The manufacture and use of the improved blow-pipe hereinbefore described
and illustrated in the accompanying drawing.
Dated the 28th day of February 1803
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.