Year: 1887

page_text: Date of Application, 2nd Aug., 1887
Specification Accepted, 20th Sept., 1887.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents
Southampton Buildings, in the County of Middlesex 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 in which the liquid is expelled through a
discharge tube by the compression of a flexible rubber bulb, communicating with the
discharge tube and with the receptacle from which the liquid is drawn.
It is the object of the invention to provide the discharge tube of a syringe of this
class with a section or reservoir forming a part of the conduit through said tube, but
of greater elasticity than the tube, said section or reservoir being capable of being
expanded by the pressure of the liquid which is forced through said bulb by the
compression of the bulb, and of contracting when such pressure ceases and by its
contraction expelling a part of the liquid accumulated in it, thus maintaining
a discharge through the nozzle, while the bulb is being refilled, so that the
discharge may be made practically continuous, the bulb and elastic reservoir acting
alternately.
The invention consists in the combination with the discharge tube of a syringe of
the class above described, of an elastic reservoir forming a part of the conduit or
passage through the discharge tube, but of greater elasticity than said tube, so that
the reservoir will be expanded by the liquid being impelled through the tube by the
compression of the bulb, and will contract and expel the liquid accumulated in it
while the bulb is being refilled.
The invention also consists in the combination with said elastic reservoir and the
discharge tube to which it belongs, of a casing secured to said tube and enclosing
the reservoir to protect the latter from injury, and to prevent it from being
wrinkled or bent out of shape, all of which I will now proceed to describe.

page_text: In the accompanying drawing
Figure 1 represents a side view of the discharge tube of a syring embodying my
invention.
Figure 2 represents a longitudinal section of the same.
Figure 3 represents a perspective view partly in section, of a modification.
Figure 4 represents a longitudinal section of a discharge tube showing the reservoir
applied to the flexible part of the tube.
Figure 5 represents an enlarged sectional view of a modification.
Figure 6 represents a side elevation of the casing, discharge tube and nozzle shown
in Figure 7.
Figure 7 represents a longitudinal section of a differently formed reservoir and its
casing embodying my invention, the same being applied to the discharge tube and
nozzle of a syringe.
Figure 8 represents a side view of the holder on which the reservoir shown in
Figure 7 is stretched.
Figure 9 represents a section on line .,, Figure 3.
Figure 10 represents a sectional view of the casing, showing its parts held together
by friction.
Figure 11 represents a sectional view of another modification.
Figure 12 represents a side view of a complete syringe having my improvement.
The same letters of reference indicate the same parts in all the figures.
Referring first to Figures 1. 2. 3. 4, 9, 10, 11, and 12. A represents the bulb of
syringe having the usual valves at and ¹ and provided with the inlet tube B,
said bulb being adapted to be compressed by the hand of the operator as usual.
a
a represents the discharge tube said tube being usually of flexible rubber; and c
represents the elastic reservoir. In Figures 1, 2, 3, 9 and 10 I have shown the
reservoir applied to the rigid nozzle at the discharging end of the tube a while in
Figures 4 and 11 I have shown it applied to the flexible tube itself.
The nozzle shown in Figures 1 and 2 has an enlargement or casing 2, of metal,
hard-rubber or other suitable material, to one side of which the discharging tip 3, of
the nozzle is affixed, and to the other side the neck 4, to which the rubber portion 5,
of the discharge tube is attached. Within the casing 2 is the elastic reservoir c,
which is a spherical or other shaped chamber of rubber sufficiently thin to enable it to
yield and be distended by the pressure of a liquid within it, and connected by rigid
couplings 6, 6, with the tip 3 and the neck 4, so that the channel or conduit of the
discharge tube is directly through the elastic reservoir. It will be seen therefore
that when the bulb of the syringe is compressed the pressure of the liquid forced
thereby through the discharge tube will distend the reservoir c, and that when the
bulb is released and ceases to force the liquid the elastic reservoir will contract by
reason of its elasticity and will expel the accumulation of liquid therein until it
regains its normal diameter. It is evident therefore that if the reservoir c be made
of sufficient capacity it will discharge liquid through the nozzle during the
entire time that the bulb is being refilled, so that a continuous discharge may be
maintained.
The casing 2 protects the elastic reservoir from external injury and prevents it
from being distended to an injurious extent. The casing also prevents the reservoir
from being creased or bent and flattened by bending as it would be liable to be if
unsupported.
I prefer to make the casing in two seperable sections, which may be screwed
together, or fitted together like the parts of a box, as shown in Figure 10.
In Figures 3 and 9 I have shown the reservoir as corrugated lengthwise, to give it
a greater capability for distension.
Figures 4 and 11 show the elastic reservoir applied directly to the elastic portion
of the discharge tube. The reservoir shown in Figure 4 is spherical in shape and is
made of rubber which is thinner than that of which the tube is made. The reservoir
is in this case suitably secured to lips or flanges formed on the ends of two sections of
the rubber tube.

page_text: The reservoir shown in Figure 11 is cylindrical in shape, the body of the cylinder
being a tube of comparatively thin rubber cemented to thicker end pieces or heads,
which are cemented or otherwise secured to the sections of the rubber tube.
It is obvious that the reservoirs shown in Figures 4 and 11 may be protected by
casings 2, supported by the tube. In Figure 4 I have shown a casing in dotted
lines, the same being made in separable sections, each provided with a sleeve 8, fitting
closely upon the discharge tube.
I am aware that it is not new to make the discharge tube of a syringe capable
of distension along its entire length. It will be observed however that my elastic
reservoir is very limited in length compared with the entire tube, and is therefore
put under greater pressure when distended than the tube last above described, and
contracts more quickly and positively than such tube, so that the expulsion of liquid
by the contraction of the reservoir is more nearly like that caused by the compression
of the bulb.
The nozzle having the reservoir and casing may be put on sale as an article of
manufacture, to be used with any of the syringes now in use.
In the construction shown in Figures 5, 6, 7 and 8. I make the reservoir preferably
in the form of a tube of elastic rubber and place it on a rigid frame or holder. Said
frame is of such size and shape that when the rubber tube is placed upon it, said tube
is necessarily stretched and is held by the holder in a stretched condition so that it
cannot contract to its normal condition but remains in a permanent state of tension.
The form of the reservoir and its holder inay of course, be variously modified but
iny purpose is best suited by making the reservoir of a tube of rubber as already
described and the holder of two externally threaded end tubes or collars 2, 2 and a
Hat connecting piece to the ends of which the end tubes or collars 2, 2 are rigidly
attached.
The rubber tube is normally of such diameter that it must be stretched in order that
the ends may enclose the tubular collars 2, 2, and said ends are placed upon and
secured to the external surfaces of said collars in any suitable way, as by binding on
with wire or cord or as I prefer and have here shown by providing said tubular collars
with peripheral grooves 4, 4, at their inner ends, and forming beads 5, 5, on the ends
of the rubber tube, said beads being formed to fit the grooves 4, 4, and hold themselves
in engagement therewith.
The connecting strip 3 extends longitudinally through the centre of the reservoir as
shown in Figures 5 and 7. It will be seen that the reservoir is at all times in a
stretched condition being partially stretched when contracted to the utmost limit
rendered possible by the holder. While therefore, the reservoir is adapted to be
distended by the pressure of the liquid within it, like the reservoir previously described,
its contraction after the distending pressure has ceased is much more positive and
forcible than is that of the other reservoir and the discharge of liquid caused by the
action of the reservoir is more vigorous.
The threaded portions of the end collars 2, 2 are secured into caps to which are
respectively connected by suitable fittings the discharge pipe a and nozzle b.
The caps are externally screw threaded and are provided with flanges 9 g.
h represents the casing which encloses and protects the reservoir c.
Said casing
may be either of rigid material as hard rubber, inetal etc., or of comparatively yielding
material as rubber not vulcanized to rigidity, although it should be here remarked that
the casing should be sufficiently stiff to prevent it from being easily collapsed or
creased. The casing is secured to the end caps f,f by being secured onto the same
its ends abutting against the flanges gg. The manner of securing the casing however,
may be variously modified without departing from the spirit of my invention.
I provide the casing with one or more vent orifices to permit the air to escape
from the casing when the reservoir is being distended and to enter the casing when the
reservoir is contracting. This last described feature, viz. the vent hole or holes may
be applied to the casing shown in figures 1, 2 and 3.
In figure 5 I have shown a modification in which the casing and nozzle are made in
one piece, the casing being extended beyond the outer end of the reservoir and provided

page_text: with a rounded end having numerous orifices. This construction is adapted principally
for vaginal purposes.
It is obvious that various other modifications may be made without departing from
the spirit of my invention.
Having now particularly described the nature of the said invention and in what
manner the same is to be performed, as communicated to me by my foreign corre-
spondent, I declare that what I claim is.
First. The combination in a syringe of the main bulb, the discharge tube or
conduit, an additional elastic reservoir forming a part of the said conduit and located
at a point between the main bulb and the discharging end of the conduit, and a casing
or protector enclosing the reservoir, as set forth.
Second. As an improvement in syringes, a tube or conduit adapted to conduct
liquid from the main bulb of the syringe, and provided with an additional elastic
reservoir and with a casing or protector enclosing said reservoir as set forth.
Third. A nozzle forming a part of a discharge tube or conduit and composed of
a discharge tip, a neck adapted to be connected to a flexible tube, a casing composed
of separable parts and secured to said tip and neck, and an elastic reservoir within
said casing and coupled to said tip and neck, as set forth.
Fourth. The combination with the discharge tube of a syringe, of an elastic
reservoir forming a continuation of said discharge tube and a holder on which said
reservoir is stretched, as set forth.
Fifth. The combination with the discharge tube and nozzle of the elastic reservoir,
and the holder composed of the end collars and the connecting strip or bar,
to which said collars are rigidly attached as set forth.
Sixth. The combination with the elastic reservoir and the discharge tube of a casing
either rigid or elastic, provided with one or more vent holes, as set forth.
Seventh. The combination of the elastic reservoir, the holder composed of the
threaded end collars and the connecting bar or strip the caps f, adapted to be
secured respectively to the discharge tube and nozzle and the casing secured to said
caps, as set forth.
Eighth. The holder composed of the peripherally grooved end collars and the
connecting bar or strip, combined with the elastic reservoir having beaded ends formed
to engage the grooves to the collars, as set forth.
Dated this 22nd day of July 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London
Agents for the Applicant.