Improved Syringe for Subcutaneous Injections.
Year: 1898

page_text: Date of Application, 18th Aug., 1898-Accepted, 1st Oct., 1898
COMPLETE SPECIFICATION.
Improved Syringe for Subcutaneous Injections.
I, CHARLES DENTON ABEL, of Birkbeck Bank Chambers, Southampton Build-
ings, Chancery Lane, in the County of London, Consulting Engineer and Char-
tered Patent Agent, do hereby declare the nature of this invention (as communi-
cated to me from abroad by the Actien Gesellschaft fur Feinmechanik, vormals
Jetter and Scheerer, of Tuttlingen, Germany) and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement:—
The tubular injection needles for subcutaneous injection syringes were hereto-
fore usually made of uniform diameter throughout and were inserted with the
one end into the syringe nozzle from the outside. With this arrangement the
disadvantage arose that if the needle broke, the one end remained in the nozzle
of the syringe, and could only be removed with difficulty, because the fracture
generally takes place close up to the nozzle.
To remedy this, it has been proposed to form a conical head on the end of the
needle which is secured on the nozzle by a screw cap. This arrangement however
has the disadvantages, firstly, that the effective cleaning of the screw threaded
cap is very difficult, and secondly, the fixing on of a new needle involves a
tedious screwing and unscrewing of the cap.
Another modification which has been proposed consists in forming round the
end of the needle a tubular enlargement or cap which fits over the nozzle; this
also suffers from the disadvantage, among others, of difficult access to the interior
of the cap for effectual cleaning.
The present invention relates to an improved construction which obviates the
disadvantages of the above constructions, and which I will describe with reference
to the accompanying drawing which shews a view of the syringe partly in section.
As shewn, the blunt end of the needle a has fixed upon it an extended enlarged
part which is inserted from the outside into the nozzle of the syringe. The
needle passes entirely through the part b so as to have a firm hold in the syringe.
On the breaking off of the needle the enlarged part can be readily laid hold of
with the fingers and withdrawn from the nozzle, for replacing it by a new needle,
without requiring any tedious screwing and unscrewing of special fixing devices.
If the part be made of soft metal such as tin, then by bending it more or less,
the needle can have a corresponding angular position relatively to the axis of the
syringe imparted to it, such as may be required in certain cases. The form of
the part may be variously modified, being either circular, or flat or prismatic,
for preventing the needle from turning round.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
In syringes for subcutaneous injections. an injection needle provided with an

page_text: enlarged part at its blunt end, fitting into a corresponding bore of the syringe
nozzle substantially as described.
Datad this 18th day of dvoust 1808
ABEL & IMRAY,
Agents for the Applicant.