Improvements in Syringes.
Year: 1891

page_text: Date of Application, 5th Mar, 1891.
Complete Specification Left, 13th May, 1891-Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Syringes.
1 GEORGE WHYTE, Doctor of Medicine, Northview, Elgin, Scotland, do
hereby declare the nature of this invention to be as follows
The improvements consist in doing away with the piston and substituting therefor
a hollow india rubber ball of a peculiar make. This ball has on one side a rubber
cork perforated through its centre. The walls of the ball vary in thickness, being
thinner opposite the cork and gradually getting thicker towards the cork. Opposite
the cork there is an opening in the ball, and through this opening, the centre of
the ball and cork, passes a metallic rod, terminating in a button, which prevents
fluid entering the ball when the latter is at full expansion. This rod is fixed air
tight by means of two opposing plates at the top of the ball. The barrels of the
syringes are made in the usual way, and of the usual material, the cork of the ball
enters the barrels of the syringes, and the barrels of the syringes ought to be of
somewhat greater capacity than that of the rubber balls. The nozzles and necks of
the barrels may be bent in different angles for special purposes. These rubber
balls may be also used for injection syringes, bags &c. The perforation through
the cork is lined with metal and is so arranged with the rod that air passes freely
in and out of the rubber ball when working.
Dated this 2nd day of March 1891.
GEORGE WHYTE, M.D.
COMPLETE SPECIFICATION.
Improvements in Syringes.
1, GEORGE WHYTE of North View Elgin, in the County of Elgin, Scotland,
Doctor of Medicine 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 :-
4
This invention is designed to supply a more efficient and reliable syringe for
medical and general purposes.
The improvements consist in substituting an india-rubber hollow ball of peculiar
make for the old-fashioned piston and by adding thereto the fittings hereafter
described whereby I obtain a syringe adapted for injections or any other purpose
far superior to anything of the sort hitherto introduced.
I will now proceed to describe my invention with reference to the accompanying
drawings in which
Fig. 1 shews a section of the ball a, and its fittings.
Fig. 2 shows the two concavo-convex discs g, h, and the guide-rod d, and
button f.
Fig. 3 the small tube e.
Fig. 4 shews a plan of the interior disc g.
It will be seen in Fig. 1 that the ball is constructed thicker on one side than on
the other, and that on its thickest side there is a projecting plug of rubber forming
a conical teat or cork, and having a passage c, through its centre, in which the
round tube is inserted, inside which the square rod d, works to and fro when the.
syringe is in use.
The thinnest side of the ball is opposite to the plug or cork, and here is an
opening k in the ball, through which a screw i, passes and forms an airtight con-
nection between the exterior disc h, and the interior and opposing disc g. This

page_text: latter disc has teeth around its edge so as to prevent slipping. The disc g, as shewn
in Fig. 1 is connected on its concave side to the guide rod d, which passes through
the tube e, and terminates in the button f.
The button, and the outer disc h, being thus connected together by means of
the rod d, and screw is the ball is thereby kept air-tight until pressure is applied
ath, when the rod d, and the button f, being thrust forward the air escapes through
the passage c, and the ball is enabled to collapse.
The cork b, forms the air-tight connection between the ball and the barrel of the
syringe m, and the air driven through e, propels forward any fluid in this barrel
which as indicated by m, m', ml, can be made with nozzles of any desired form.
It is desirable that the barrel should be of rather greater capacity than the interior
of the ball.
My improved rubber ball and fittings can also be used for injection bags and
other similar purposes. Owing to the passage c, being lined with the round metal
tube and owing to the rod d, being angular in section, the latter works easily to
and fro, and air passes freely in and out of the rubber ball when working.
e,
Having now fully described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed; 1 declare that what I
claim is :-
:-
1. A hollow india rubber-ball of varying thickness having on one side a perforated
plug or cork b, and on the other side an aperture k, as herein described and set
forth.
2. The combination of the india-rubber ball herein described with the two con-
cavo-convex discs g, h, the screw i, the guide rod d, the tube e, and the button f, as
herein described and set forth.
Dated th: 19th
J.M. 1001
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.