IMPROVEMENTS IN URETHRAL SYRINGES AND IN THE METHOD or and APPARATUS FOR MANU- FACTURING THE SAME
Year: 1882

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery Lane, in the
County of Middlesex, Patent Agent, for an Invention of "IMPROVEMENTS IN
URETHRAL SYRINGES AND IN THE METHOD or and APPARATUS FOR MANU-
FACTURING THE SAME," A communication from abroad by Franz Wilhöft,
of New York City, United States of America, Physician.
COMPLETE SPECIFICATION filed by the said Alexander Melville Clark at
the Office of the Commissioners of Patents on the 15th February 1882.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent.
IMPROVEMENTS IN URETHRAL SYRINGES AND IN THE METHOD
OF AND APPARATUS FOR MANUFACTURING THE SAME." A communication from
abroad by Franz Wilhöft, of New York City, United States of America, Physician.
This Invention relates to an improved urethral syringe and process of making
the same.
The syringe when completed is formed of one piece of soft rubber, and is
composed of a bulb and a nozzle. The nozzle is made of a solid piece of rubber
with a central channel, and the bulb is slipped over and secured to one end of said
nozzle. The other end of the nozzle is conical, so that it may be introduced into
the urethra without entering too far into the same.
In the accompanying Drawings Figure 1 is a side view of the urethral syringe;
Figure 2 is a longitudinal central section of the same and a protecting cap
therefor; Figure 3 is a transverse section through the bulb before it is vulcanised;
Figure 4 is a bottom view of the knife used for making the bulb; Figure 5 is a
longitudinal section on line x-x, Figure 4; Figure 6 is a transverse section through
the mould for making the nozzle; and Figure 7 a similar section through the mould
in which the syringe is vulcanised.
With particular reference to Figures 1 and 2, A is the improved urethral syringe
composed of a bulb a of soft rubber, and of a nozzle b likewise of soft rubber, which
is fitted into one end of the bulb. The nozzle is entirely solid with the exception
of a central passage leading from end to end. It is screwthreaded around its

page_text: use.
circumference and provided with a conical end c, as shown. A cap B is of such
size and form as to fit over and protect the nozzlo when the instrument is not in
The peculiar conical shape of the nozzle enables it to enter into the urethra
but a short distance, and to close the same properly if slight pressure is applied.
The fact that the nozzle is solid, as described, will prevent it from partaking in the
change of form of the bulb when the latter is compressed.
This improved urethral syringe is by far more conveniently handled than the
ordinary piston syringes; its conical end facilitates introduction, prevents too deep
insertion, properly opens the urethra, and at the same time prevents back flow of
the liquid introduced. Moreover, the syringe may be carried in the pocket filled
with the liquid to be injected.
The apparatus for making the improved syringe consists of a knife C (Figures 4
and 5), and two moulds D and E (Figures 6 and 7). The knife C has a cutting
edge d of the form shown in Figure 4. It will cut out of a sheet of rubber a
section which will constitute one quarter of the bulb of the syringe. The knife is
of cylindrical form, hollow, and provided with a suitable handle. The mould D for
making the nozzle is made in two halves, e and f, fitting one upon the other, each
half forming one half of the nozzle. The two halves are grooved centrally, and
into the channel thus formed may be introduced a pin g. This pin is introduced
while the mould is filled with rubber; it will form the central opening or channel
in the nozzle. After four sections of the bulb have been cut out and joined the
bulb will appear in cross section, as shown in Figure 3. It is now filled with
water to about one third of its capacity, and one end of the nozzle is slipped into
the same and cemented in place. The whole is then introduced into the mould E
(Figure 7) which has the shape the syringe is to assume. In this mould the syringe
is properly vulcanised and is then completed.
Having described the nature of the said Invention, and the manner of
performing the same, I declare that what I claim as new and desire to secure by
Letters Patent is,―
1st. The urethral syringe A composed of the bulb a and nozzle 6 having conical
end c, the whole being made substantially as herein shown and described.
2nd. The urethral syringe A consisting of a flexible bulb, a nozzlo made conical
to fit into the urethra, and an intermediate screwthreaded neck, all of soft rubber
and adapted to receive a cap B, substantially as described.
3rd. In the process of manufacturing a syringe A, the mould D composed of two
halves e, f, each being grooved centrally to receive the pin g, substantially as.
specified.
4th. In the process of manufacturing a syringe A, the knife C, and moulds D
and E, substantially as specified.
5th. The process of making a soft rubber urethral syringe consisting of the
following steps:-Cutting sections from a sheet of rubber and joining the same to
form the bulb, filling said bulb partly with water, then attaching the perforated
conical nozzle, and finally subjecting apparatus to the process of vulcanization,
substantially as specified.
In witness whereof, I, the said Alexander Melville Clark, have hereunto set
my hand and seal, this Fifteenth day of February. A.D. 1882.