RESERVE An Improved Ejector for Dental or other Purposes.
Year: 1886

page_text: Date of Application, 19th Aug., 1886.
Complete Left, 7th June, 1887.
Complete Accepted, 19th July, 1887.
RESERVE
An Improved Ejector for Dental or other Purposes.
JOSEPH CHARLES PLUNKETT 173 Stroud Green Road London N. Surgeon dentist
do hereby declare the nature of this invention to be as follows:-
This Invention consists in an improved ejector for dental, or other purposes, and is
carried out as follows, A bent syphon tube of small diameter is enclosed within a
slightly larger tube having at the exit end a reducing nozzle, and at the other end a
cock for regulating the supply of water, or other fluid used for creating the vacuum. The
end of the enclosed syphon tube nearest the reducing nozzle is perforated with slits,
or a series of other apertures, and the other end is free, and is usually formed into a
bend or other convenient shape. The action of the apparatus is as follows, An indin
rubber tube is fitted to the free end of the syphon; and is placed in the mouth of the
patient. Water or other fluid under a slight pressure is now permitted to flow through
the larger tube surrounding the enclosed syphon; and covering the slits, or apertures,
formed in its ends. A vacuum is thereby formed within the syphon, and fluid can be
drawn by its means from the mouth of the patient. No valve, or double internal cone
is required the water surrounding the enclosed syphon forming a perfect seal and
replacing them.
L 1011 1
1000
FRANCIS M. ROGER,
Applicant's Agent.

page_text: JOSEPH CHARLES PLUNKETT, 173 Stroud Green Road, London N. Surgeon-Dentist,
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 consists in an improved ejector for dental, or other purposes; and is
carried out as follows. A. bent syphon tube of small diameter is enclosed within a
slightly larger tube having at its exit end a reducing nozzle, and at the other end a
cock for regulating the supply of water, or other fluid used for creating the vacuum.
The end of the enclosed syphon tube nearest the reducing nozzle is perforated with
slits, or a series of other aportures, and the other end is free and is usually formed into
a bend or other convenient shape. In order to make clear the general construction,
and operation of my improved ejector, reference is made to the annexed drawing in
which:-
Fig. 1, is an elevation of the ejector mounted up as when in use.
Fig. 2, a front elevation, the mouthpiece being detached.
Fig. 3, a sectional elevation.
Fig. 3, enlarged views of end of internal suction tube.
Fig. 4, portable form monnted on stand.
The foot or plate A, Figs. 1 2, 3, is screwed or otherwise fastened in any other
convenient manner to the wall, wood lining, or other suitable material within the room,
laboratory, or apartment, or the entire instrument may be mounted upon a stand as
shewn in Fig. 4. Attached to the foot A, is a barrel or tube B, terminating preferably
at its lower end in a reducing nozzle C, to which a waste tube or pipe D, is fitted.
The upper part of the barrel or tube B, is fitted with a cock h, and union or equivalent
device for connecting up to a cistern, or other head, or source of water or other fluid.
Within the barrel or tube B, is also fitted the suction pipe E, which is preferably bent
as shewn, the end within the tube being perforated or furnished with slits F, see
Figs. 3. To the bent tube E, is fitted an elastic or flexible tube G, to which is fastened
in any suitable manner the suction pipe H; that shewn in the drawing is the form I
usually employ for keeping the mouth of a dental patient free from water, or saliva,
when under examination. I do not confine the application and use of my invention
exclusively to dental purposes, as it can be applied to a variety of uses, chemical,
physical, surgical or otherwise wherein an ejector, would be of service. The action of
the apparatus is as follows. The suction tube G, fitted to the pipe H, being placed in
the mouth of the patient, water or other fluid under slight pressure is admitted by
means of cock h, mounted upon the top of the tube B, this rapidly fills the annular
space between the internal tube E, and the inner wall of tube B, and passes out by
means of the reducing nozzle (), and waste pipe D. A vacuum is thereby created in

page_text: the flexible tube G, and any water or other fluid which may have collected in the
mouth of the patient is drained off through suction pipe H.
If the tube be fitted with a suitable nozzle as shown for fitting to the end of a
funnel (see Fig. 4); the operation of filtration may be accelerated, or the air, or other
fluid sucked out or exhausted from a dessicator, or equivalent apparatus.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, I declare that what I claim is ;—
1st. An ejector applicable to dental or other purposes having no cone, double cone,
or internal valve, but consisting of outer tube, inner or suction tube, furnished with
slits perforations, or their equivalent, substantially as shewn herein and described.
2nd. In an ejector constructed as described the combination of an outer and inner
tube with an annular space between them, within which space the water, or other
fluid under pressure circulates, thereby causing a vacuum within said inner tube, or
suction pipe having slit, slits, or perforations, substantially as set forth.
Dated Tun 7th 1997
FRANCIS M. ROGER,
Applicant's Agent.