Improvements in Injection Syringes.
Year: 1899

page_text: Date of Application, 24th Feb., 1899-Accepted, 1st Apr., 1899
Improvements in Injection Syringes.
I, PHILIPP WALTHER, Doctor of Medicine, of St. Gregoriusstrasse 1, Munster
i/Elsass, Germany, 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 an improved injection syringe in which the needle
or nozzle is provided, at its end, with a conical plug capable of being fixed
into the solid front part of the body of the syringe said front part being also
provided with a conical mouth or opening for the reception of the plug. The
needle or nozzle also is ground flat like a lancet. Owing to these important
improvements, in a medical sense, it is possible to easily clean the syringe
mechanically and to disinfect it chemically which is not the case with the
Pravaz and the improved Koch injection syringes in which germs of disease,
say the germs of mortification of the spleen, may lodge and defy every known
mode of disinfection even including currents of steam. This being the case it
is perfectly evident that, when such syringes are used more than once, they
are liable to infect persons with the disease germs clinging to them. In con-
tradistinction to this the new syringe can be used over and over again without
the least danger as it is hygienically free from every objection if the ordinary
precautions, such as are usually observed when medical instruments are being
sterilized, are taken.
Experiments have shown that subcutaneous or intraperitonal injections are
far less painful when the point of the injection needle is ground flat and made
with a point like that of a lancet than when the point is blunt as is the case
with the ordinary hollow needles or nozzles of injection syringes. Such being
the case I make the needle with a point which is ground flat like that of a
lancet. This improvement, which alters the shape of the needle, is an impor-
tant one when its advantages are considered.
The new syringe can be made, according to the use to which it is to be put,
of hard india-rubber, glass silver or aluminium. I prefer to make the conical
mouth-piece in one with the body of the syringe whilst the Pravaz piston or
the Koch india rubber ball could be used for generating pressure.
The annexed sheet of drawings shows the improved syringe in section. A
separate view drawn to an enlarged scale shows the tubular needle or nozzle.
As will be seen the tubular body A of the syringe is, at its upper end, made
with a solid part D which is provided with a conical opening C into which
can be fitted airtight the conical plug B having the tubular needle N therein.
The point of this needle, as shown, is ground with a flat sharp lancet-like
point d.
The plug B may be made, at the same side as the opening at the point of the
needle, with a flat facet-like portion or it may be provided with any suitable
mark so that the needle may be properly inserted even in a poor light.

page_text: Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what
I consider novel and desire to claim is:-
1. An injection syringe whose needle or nozzle is provided with a conical
plug which is inserted into a conical mouth or opening made in the body of
the syringe for its reception, substantially as and for the advantages set forth.
2. In a syringe such as claimed in Claim 1 the making of the hollow needle
or nozzle with a point which is ground flat and shaped like the point of a
lancet, substantially as and for the advantage set forth.
Dated this 23rd day of February 1899.
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.