Year: 1885

page_text: I PHILIP ARTHUR NEWTON of the Office for Patents 6 Brean's Buildings
Chancery Lane in the County of Middlesex, Patent Agent 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 syringes into which the liquid to be ejected therefrom
is drawn by the expansion of a hollow elastic or flexible bulb, and from which the
liquid is ejected by the contraction of the said bulb by external pressure.
Syringes of this class having only one bulb, as heretofore constructed, are only
capable of producing an intermittent stream, the discharge taking place only while
the bulb is compressed, and ceasing while the pressure is relaxed and the bulb is
expanding to fill the syringe.-The principal object of the invention is to obtain a
continuous or nearly continuous discharge from such a syringe, and to this end an
important feature of the invention consists in the construction of the discharge
tube of such a syringe, of such folded flattened or corrugated form, that it may
expand freely in such manner as to enlarge its calibre while the liquid is being
forced through it by the compression of its bulb, and that it may, by its collapse,
when not subject to internal pressure, contract in such manner as to reduce its
calibre, and so produce a continuance of the discharge of the liquid from it while
the bulb is expanding and filling.
The discharge tubes of such syringes will generally be made of india rubber, or
material which is not only flexible and collapsible, but also so elastic that it may
be capable of stretching, but it is not desired to make the collapsible corrugated or
flattened tubes to stretch, or to have their calibre enlarged beyond the normal
dilatation to a circular form, a part of this invention consists in the construction of
such tubes with a contained spirally wound thread of material which is flexible,
but inelastic, or incapable of stretching.
Another feature of this invention consists in providing in the end of the flexible
or elastic tube, which receives the nozzle of metal or other hard material, a ring of

page_text: metal, whereby the said tube may be made to hold and firmly retain within it a
nozzle having a plain or smooth end, and thereby to dispense with screw fittings
for the attachment of the nozzle of a syringe.
This invention furthermore consists in providing the receiving end of the suction
tube of the syringe with a sinker composed of a ring or piece of metal or heavy 1
material embedded into and encased within the india rubber or lighter material of
which the said tube is composed, whereby the sinking of said end of the said tube
in the liquid to be used in the syringe is insured, and the sinker and the liquid are
protected from each other.
Fig. 1 in the accompanying drawings is a general view of a syringe constructed
according to this invention.
Fig. 2 is a transverse section of the suction tube near its receiving end, in the
line of Fig. 1.
Fig. 3 is a perspective view of a piece of the discharge tube corresponding with
Fig. 1, but on a larger scale.
Figs. 4 and 5 are transverse sectional views corresponding with Fig. 3, and
showing the said tube in its normal collapsed condition, and as dilated in use.
Figs. 6 and 7 are perspective views of modifications of the discharge tube.
Fig. 8 exhibits a longitudinal sectional view of a portion of a discharge tube
having inserted within it a nozzle, said Fig. illustrating in a collapsed condition
another construction of self collapsible tube, and also illustrating our improvement
in the attachment of the nozzle.
Fig. 9 is a longitudinal sectional view corresponding with Fig. 8, showing the
tube in an expanded condition.
Fig. 10 exhibits a transverse section taken in the line y y of Fig. 8.
Similar letters of reference indicate corresponding parts in the several Figures.
B is the bulb, S is the suction tube, D is the discharge tube, and N is the
nozzle. I is the induction valve between the suction pipe and the bulb. E is the
eduction valve between the bulb and the discharge tube. All these parts are, or
may be, of ordinary construction, except the discharge tube D, and the inlet end
of the suction tube S.
The discharge tube D, which is of india rubber or analogous material, is of such
folded corrugated or flattened form, that in its normal condition it is collapsed or
has its calibre contracted to a minimum, and that it may, by its unfolding, or the
spreading apart of its sides, or portions thereof, have its internal calibre very
considerably increased. The forms which may be adopted for the normal condition
of this tubo may be considerably varied. Several forms are shewn which are
suitable.—That shown in Figs. 3 and 4 is the same as is shown in Fig. 1.—Two
other suitable forms are shown in Figs. 6 and 7.-When the pressure produced by
the compression and contraction of the bulb is brought to bear upon the liquid in
the syringe to discharge the said liquid through a discharge tube of the kind above
described, the said tube is dilated by such pressure, so that its calibre is greatly
increased, as may be understood by reference to Fig. 5, but when the pressure on
the bulb is released, and the eduction valve closes to shut off from the bulb the
liquid in the said tube, the tendency of the said tube to collapse or automatically
regain its normal shape brings a pressure upon the said liquid, so that its
discharge is continued, and hence a continuous or nearly continuous discharge is
maintained.
a a in Fig. 3 designate the spirally wound threads which are contained within
the walls of the discharge tube for the purpose of preventing it from being stretched
after having been distended as fully as is permitted by the separation and spreading
out of its folded parts.
The direction of said threads is also indicated by lines of shading designated by
a² a¹ in Figs. 1, 3 and 6, such shading representing the slight swelling produced on
the exterior of the tube by said thread. This thread may be of hemp, linen, flax,
or other fibrous material incapable of stretching.

page_text: The collapsible discharge tube shown in Figs. 8 and 9 is corrugated circum-
ferentially, so that its calibre and internal capacity are enlarged by its being
expanded lengthwise by internal pressure.
In Fig. 1 the nozzle N is shown as connected with the discharge tube by screw
fittings, but in Figs. 8 and 10 an improved nozzle attachment is shown. In the
last mentioned Figures, n n designate the metal ring inserted into the india rubber
socket D¹ at the end of the discharge tube, to give the said socket a firmer hold on
the smooth end n¹ of the nozzle.
C is the sinker at the receiving end of the suction tube.-This sinker is embedded
into and enclosed completely within the tube itself or the mouthpiece thereof, so
that it is protected from the liquid used in the syringe, and said liquid is protected
from it. It is represented as composed of a ring of metal. It may however consist
of a helix, or be of any other suitable form.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed, as communicated to
me by my Foreign Correspondents, I declare that what I claim is
1st A syringe tube which is of such corrugated or flattened form in its normal
condition, as to be capable of having its calibre enlarged by the separation and
spreading apart of its folded or corrugated parts when pressure is applied to liquid
within it, and which is capable of automatically regaining its normal shape when
relieved of internal pressure, substantially as herein described.
2nd The combination in a syringe of a hollow bulb, a self collapsible discharge
tube, and an interposed eduction valve, substantially as herein described.
3rd The combination with a self-collapsible syringe tube of a spirally wound
thread contained therein, substantially as herein described.
4th The combination with a nozzle N having a plain inner end n¹, of an elastic
discharge tube socket containing a metal ring n, substantially as and for the purpose
herein set forth.
5th The combination with the suction tube of a syringe, of a sinkor inclosed and
protected substantially as herein described.