Year: 1886

page_text: Date of Application, 3rd Dec., 1886.
Complete Left, 30th Aug., 1887.
Complete Accepted, 30th Sept., 1887.
потрог
County ΟΙ
M.I.M.E. do hereby declare the nature of this invention to be as follows:-
Miroratesex,
The invention relates to syringes, and has for its object to provide improved means
for maintaining a continuous or uninterrupted flow with only one bulb or single
acting pump.
The inlet tube or conduit is preferably made of rubber, as usual. In order to sink
it without noise, when using, a metallic ring is provided as sinker, which is pushed
into the tube to a little distance above the end. Below the sinker are side openings
in the tube for use in suspending the syringe for drying.
The bulb or pump is single acting, as usual, provided at each end with a valve-
coupling and operating the syringe on the compression of the bulb, the bulb refilling
in expanding, as usual.
The outlet tube or conduit is attached at one end to the valve-coupling, and is
provided at its other end with the ordinary discharge nozzle. In order to prevent the
tube from getting off the coupling, the latter is provided with a rigid or non-flexible
ring which may be slid upon the coupling and over the end of the tube to compress
it in a circular groove in the coupling.
Within the conduit is arranged an elastic air-chamber, preferably made of a soft
rubber tube, the object of which is to produce a continuous flow, which is accomplished
in the following manner: When the conduit surrounding the air-chamber is full of
water or other liquid and the bulb compressed to operate the syringe, the said air-
chamber is compressed or contracted by the pressure of the surrounding liquid ; and
when the pressure is withdrawn from the bulb to allow it to expand and refill, and
consequently the pressure upon the air-chamber is released, the said chamber expands,
and thus forces the liquid out through the nozzle, thereby keeping up a continuous
flow just as effectually as a double acting pump; the compression of the bulb and the
expansion of the air-chamber acting alternately to maintain uninterrupted flow.

page_text: The said air-chamber may be either closed or it may be communicating with the outer
air. When entirely closed, any air-tight Hexible material may be used, the acting
power being then the expansion of compressed air; but if the chamber is com-
municating with the outer air, the material itself should be elastic, preferably of
rubber so as to resume its norinal shape, that is, expanding by its own clasticity,
the elasticity of the material itself, in that case effecting the pressure.
In order to retain the air-chamber within the conduit one end thereof may be
fastened to the conduit itself or to the valve-coupling of the bulb by a tubular
extension in which are side openings to allow the liquid to pass through the conduit
and surround the air-chamber.
When the air-chamber is in communication with the outer air, the tube which forms
the vent from the air-chamber through the side of the conduit may be sufficient to
retain the air chamber in place without any other fastening.
A normally open spring-clasp, whose arms, having inward bent ends, may be
compressed toward each other to flatten the tube and thus stop the flow and may be
kept so compressed, if desired, by pushing a ring over them.

page_text: COMPLETE SPECIFICATION.
Improvements in Syringes.
A communication from JOSHUA BARNES, of Brooklyn, in the County of Kings and
State of New York, Inventor.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
M.I.M.E. 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 and has for its object to provide improved means
for maintaining a continuous or uninterrupted flow with only one bulb or single
acting pump..
The invention will be hereinafter fully described reference being had to the
accompanying drawings in which :-
Figure 1 represents a general view of the improved syringe complete partly broken
out in longitudinal section.
Figure 2 is a detail longitudinal section showing a modification in the manner of
securing the air-chamber.
Figure 3 is a sectional detail showing a modification in the construction of the air-
chamber.
Figure 4 shows a modification of figure 3.
A is the inlet tube preferably made of rubber as usual. In order to sink it without
noise when using, sinker is provided with simply a metallic ring a covered with
rubber and pivoted with its ends in sockets in opposite sides of a small nipple a inserted
in the lower end of the tube as shown in the drawings. The ring a when striking
will turn and rest flat on its side leaving the tube resting upright on the lower end of
the nipple, and is also for use in suspending the syringe for drying. B is the bulb
or pump, which is single-acting as usual; provided at each end with a valve nipple
and operating the syringe on the compression of the bulb the bulb refilling in
expanding as usual. C is the outlet tube or conduit attached at one end to the valve
coupling band provided at the other end with the ordinary discharge nozzle E. In
order to prevent the tube C from getting off the coupling b upon the latter is provided
a rigid or non flexible ring H which ring may be slid upon the coupling and over
the end of the tube to compress it in the circular groove of the coupling as shown in
figure 1. Within the conduit C is arranged an elastic air-chamber D preferably made
of soft rubber tubing the object of which is to produce a continuous flow which is
accomplished in the following manner. When the conduit surrounding the air-
chamber D is full of water or other liquid and the bulb B compressed to operate the
syringe, the chamber D is compressed or contracted by the pressure of the surrounding
liquid, and when the pressure is withdrawn from the bulb B to allow it to expand
and refill and consequently the pressure upon the chamber D is relaxed the said

page_text: chamber expands and thus forces the liquid out through the nozzle thereby keeping
up a continuous flow just as effectually as a double acting pump the compression of
the bulb B and the expansion of the chamber D acting alternately to maintain
uninterrupted flow. The chamber D may be either closed as in Figures 1 and 2 or
communicating with the outer air as in figures 3 and 4. When entirely closed any
air-tight flexible material may be used the acting power being then the expansion of
compressed air; but if the chamber D is communicating with the outer air, the material
itself should be elastic preferably of rubber so as to resume its normal-shape, that is
expanding by its own elasticity the elasticity of the material itself in that case effecting
the pressure. In order to retain the chamber D in place within the conduit C it may
either be fastened to the said conduit itself as in figure 1 or to the coupling as in
figure 2. In either case the closed chamber has a tubular extension d provided with
openings through which the water from the bulb and coupling enters the conduit. C
as indicated by arrows in figure 2. The said extension d may be cemented to the
conduit C as in figure 1 or it may be expanded over the end of the coupling before
attaching the end of the conduit upon the coupling as shown in figure 2. In figure 3
is shown a small vent or pipe d³ which connects the interior of the chamber D
through the side of the conduit C with the outer air the outer end of the little vent
pipe d² being of course cemented or secured to the conduit in an air and water-tight
manner. When the said pipe or vent is used as in figure 3 there is no necessity for
the extension d or other fastening to keep the chamber D in place. Instead of through
the wall of the conduit C the connection with the outer air may be and preferably is
made by a vent through the coupling 6 as in figure 4 the air-chamber D being attached
to a small nipples upon the coupling the air and liquid entering respectively the
chamber D and the conduit C where indicated by the respective arrows 1 and 2. I
am aware that it is not new to provide an uninterrupted flow in a syringe having
only one bulb or pump and I lay no claim broadly to that principle.
Having now particularly described and ascertained the nature of the said invention
as communicated to me by my foreign correspondent and in what manner the same is
to be performed I declare that what I claim is :-
1. A syringe or like article having in its outlet conduit a flexible air chamber
contracting under pressure and expanding on cessation of pressure from the bulb or
pump for the purpose set forth.
2. In combination with the outlet conduit of a syringe or like article, an elastic
tube or chamber placed within the said conduit and a vent connecting the said elastic
chamber with the outer air substantially as and for the purpose set forth.
Dated this 20th day of August 1907