Year: 1894

page_text: Date of Application (in United Kingdom), 23rd June, 1894
Complete Specification Left, 23rd June, 1894-Accepted, 28th July, 1894
Sra. The piston.
The tube which I employ is of a uniform model in order to admit of its being
fitted to all my patterns of syringes. It is made of strong glass.
This tube is composed of a cylindrical part A B C D terminated by a pointed
part E F. The opposite end to this point is open and it may be closed by means
of a stopper G of cork or other suitable material.
The said tube is placed in a perforated metallic sheath or casing. This sheath
is provided with an internal screw H into which a hollow metallic pointed nozzle
may be screwed. In the opposite end of the metallic sheath a piston
may be
pressed by means of a rod K. This rod is marked with a scale; it may be screwed
on the piston J or attached to it in any other manner.
The tubes ABCD containing the liquid which is to be injected, are filled and
prepared in advance, they may be easily sterilised and these operations may be
accomplished with the greatest care. The point of the tube is tapered to form a
nozzle. The other end is closed by means of a paraffined stopper on which a plug
of absorbent wadding is further placed.
Each tube only contains the quantity of liquid necessary for a single operation.
When it is desired to make an injection a tube is placed in the metallic sheath,
the glass point at L is broken off and the metallic point I is screwed on the sheath.
It is easily understood that by pressing on the piston J by means of the rod K,
the stopper G is simultaneously pushed forward and itself forms a piston for
causing the liquid contained in the tube to flow to the outside. When the
operation is terminated, the glass tube is removed from the metallic sheath and
thrown away.
The principle of my invention consists, as has just been seen, in preparing tubes
hermetically closed in which the liquid injection is placed; the whole being
prepared with the greatest care and by the best antiseptic processes.
As the tube
is only opened at the moment when it is about to be used, the liquid is always
maintained rigorously protected from the air and no alteration can be produced.

page_text: It is well understood that I may modify the form and dimensions of my tubes
according to circumstances, as well as the arrangement of the metallic sheath.
The tapering and hollow point 1 may be of any suitable pattern.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A hypodermic injection syringe consisting of a metallic sheath having a
piston and a hollow pointed nozzle, and a pointed glass tube adapted to be inserted
within the said sheath, substantially as and for the purpose described and
illustrated.
2. The combination with a hypodermic injection syringe, of the kind described,
of a pointed glass tube adapted to be inserted within the said syringe and having a
plug or stopper which serves also as a piston substantially as and for the purpose
described and illustrated.
Dated this 22nd day of June 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.