A Syringe for Sub-cutaneous Injections
Year: 1895

page_text: Date of Application, 30th Apr, 1895
Complete Specification Left, 28th Jan, 1896-Accepted, 7th Mar, 1896
A Syringe for Sub-cutaneous Injections
I GUSTAV BECK, Doctor of Medicine of Mattenhofstrasse 37 Berne, in the
Republic of Switzerland, do hereby declare the nature of this invention to be is
follows
-
For sub-cutaneous injections syringes have hitherto been used into which the
liquid had first to be introduced, that is to say, a transfer had to be made in
contact with free air the doctor operating close to the bed of the patient cannot
consequently in site of any precautions he may take be perfectly certain that the
liquid he is about to inject is absolutely sterilized, and this the more so since the
flask containing reserve of the said liquid will have been unstoppered several
times consecutively
In the serum therapeutic recently entered into medical use these disadvantages
stand out so strongly that the preparers of this bacteriological remedy have been
obliged to mix therewith sterilizing liquids but these additions are not without a
prejudicial influence on the therapeutical object of the injection
The object of the present invention consists in placing in the hands of the
medical man the means of having therapeutic chemical products as well as liquids
obtained by bacteriological means, alwys in a state of absolute purity and of
guaranteed sterility during the time they are preserved, that is to say in the same
condition as at the moment of then production and without it being necessary to
effect on the instrument used for the injections, the preliminary operation, always
a long one, of sterilizat on
With this object the liquid to be injected is introduced in the laboratory where
it is actually produced into a glass receptacle provided at its two extremities with
capillary tubes and having exactly the capacity necessary to contain the quantity
of liquid required for an injection After filling the two extremities are closed by
fusion and the receptacle is carried in this state to the place of use When the
doctor desires to effect the injection he has only to open the receptacle at its two
extremities by breaking the latter at a nick which will have been preliminarily
marked thereon, and then to attach to one extremity the syringe and to the other
extremity the injection tube carried by a suitable stopper cap
The use of a smooth capillary receptacle as a part of the syringe has presented
a considerable obstacle in this sense, that the stopper caps hitherto used and made
of hard materials (metal, vulcanized rubber &c) could not be applied to the
smooth surface of the capillary tubes sufficiently closely to produce a hermetic
Joint
Ginding the capillary tubes for the purpose of obtaining a perfect
adjustment of the end of the tube remaining after breaking off its extremity with
the interior surface of a haid cap if it were at all possible, none the less presents
senous difficulties of execution and would so much increase the cost of the
receptacle designed for a single injection that doctor would have to discard its
1 his difficulty is removed by the special a ingement of the stopper cap
The cap consists of two segments connected together igidly, the one of
vulcanized rubber serves to receive the injection needle, the other consisting
of a hollow cylinder or tube of soft rubber coated with an envelope of vulcanized
rubber The interior surface of the hollow cylinder, by reason of its elasticity fits
heimetically on the polished surface of the glass whilst its envelope of vulcanized
rubber gives to the impervious cap the necessary firmness and rigidity
use

page_text: The syringe is operated by pressure exerted on a rubber bulb which is preferably
A small
coated on its lower half with an envelope or shell of vulcanized rubber
glass tube is fixed in the tubular extremity of the bulb 1h tube is connected to
Tue
the capillary tube of the liquid receptacle by means of a small rubber tube
air compressed by the bulb passes first into the connecting tube and is sterilized by
a plug of wadding moistened by sterilizing liquid then it penetrates, passing
The reflux of the
through the intermediate tube into the liquid receptacle
liquid when pressure is no longer exerted on the pea, may be prevented by
pinching the intermediate tube by any suitable means
In consequence of the interchangeability of the liquid receptacles the same
synge may be used for injections of different kinds without its purification being
necessary
Dated this 29th day of April 1895
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, WC, Agents
COMPLETE SPECIFICATION
A Syringe for Sub cutaneous Injections
I GUSTAV BECK Doctor of Medicine, of Mittenhofstrasse 37 Berne, in the
Republic of Switzerland, 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
For sub-cutaneous injections syringes have hitherto been used into which the
liquid had first to be introduced, that is to say, a transfer had to be made in
contact with free air, the doctor, operating close to the bed of the patient, cannot
consequently, in spite of any precautions he may take, be perfectly certain that the
liquid he is about to inject is absolutely sterili ed, and this, the more so, since the
flask containing a reserve of the said liquid may have been unstoppered several
times consecutively
In the serum therapeutic recently introduced into medical use these disadvanta_es
stand out so strongly that the preparers of this bacteriological remedy have boun
obliged to mix therewith sterilising liquids, but these additions are not without a
prejudicial influence on the therapeutical effect of the injection
,
I he object of the present invention is to place in the hands of the medical man
the means of having therapeutic chemical products, as well as liquids obtained by
bacteriological mean ilways in a state of absolute punty and of guaranteed
sterility during the time they are preserved, that is to say, in the same condition
as at the moment of their product and without it being necessary to effect on the
instrument used for the injections the preliminary operation, always a long one,
sterilisation
of
With this object the liquid to be injected is introduced in the laboratory, where
it is actually produced, into a glass receptacle a (Fig 2) provided at its two
extremities with capillary tubes and having exactly the capacity necessary to
contain the quantity of liquid requned for an injection After filling, the two
extremities are closed by fusion and the receptacle is carried in this state to the
place of use When the doctor desires to effect the injections he has only to open
the receptacle a at its two extremities by breaking the latter at a nick which will
have been preliminarily marked thereon, and then to attach to one extremity the
syringe and to the other extremity the injection tube carried by a suitable stopper
cap b (Fig 1)
The use of a smooth capillary receptacle as a part of the syringe in accordance
with Fig 1 has presented a considerable obstacle in this sense, that the stopper
caps hitherto used, and made of hard materials, (metal, vulcanised rubber &c)

page_text: could not be applied to the smooth surface of the capillary tubes sufficiently closely
to produce hemmetic joint Grinding the capillary tubes for the purpose of
obtaming a perfect adjustment of the end of the tube remaining after breaking off
its extremity with the interior surface of a hard cap, if it were at all possible, none
the less presents serious difficulties of execution and would so much increase the
cost of the receptacle, designed for a single injection, that doctors would have to
discaid its use
Inis difficulty is removed by the special airangement of the
stopper cap
The cap b consists of two segments connected together rigidly, the one
semispherical (6) of vulcanised rubber, serves to receive the injection needle, the
other consisting of a hollow cylinder or tube 63 of soft rubber coated with an
envelope of vulcanised rubber (Fig 3) The interior surface of the hollow
cylinder, by reason of its elasticity, fits hermetically on the polished surface of
the glass whilst its envelope of vulcanised rubber gives to the impervious cap the
necessary firmness and rigidity
The syringe is operated by pressure exerted on the rubber bulb c which is
preferably coated on its lower half with an envelope or shell of vulcanised rubber
A small glass tube d is fixed in the tubular extremity of the bulb This tube is
connected to the capillary tube of the liquid receptacle by means of a small rubber
tube e
The air compressed by the bulb passes first into the connecting tube d and
is sterilised by a plug of wadding moistened by a sterilising liquid, then it penetratos,
passing through the intermediate tube, into the liquid receptacle I he reflux of
the liquid, when pressure is no longer exerted on the bulb, may be prevented by
pinching the intermediate tube by any suitable means
In consequence of the interchangability of the liquid receptacles the same
syringe may be used for injections of different kinds without its purification being
necessary
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 syringe for sub-cutaneous injections comprising an interchangable receptacle
for the liquid, teiminated at its two extremities by capillary tubes, in combination
with a stopper cap, adapted on the front capillary tube and the part of which
surrounding the tube is of soft rubber with the object of obtaining a hermetic
Joint, and a suitable injecting arrangement, substantially as described
2 A syringe for sub-cutaneous injections as described in Claim 1 in which the
lower capillary tube of the receptacle for the liquid is connected by a rubber tube
to a glass tube which is connected at the other end with a rubber bulb in such
manner that the connection between the two parts of the syringe may be interrupted
with the object of preventing the reflux of the injection liquid, substantially as
descrioed
3 A svinge such as described in Claim 2 in which a plug of wadding moistened
with a sterling liquid is arranged in the glass tube for the purpose of sterilising
the an coming from the bulb before it enters into the liquid receptacle, substantially
as described
Dated this 25th day of January 1896
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, WC, Agents