An Improved Hypodermic Syringe.
Year: 1891

page_text: Date of Application, 24th Dec., 1891
Complete Specification Left, 24th Sept., 1892-Accepted, 29th Oct., 1892
PROVISIONAL SPECIFICATION.
An Improved Hypodermic Syringe.
We, SILAS MAINEVILLE BURROUGHS and HENRY SOLOMON WELLCOME both
of Snow Hill Buildings in the City of London, Manufacturing Chemists and
Merchants, and STANLEY READ SLATER of 104 Cricketfield Road Clapton in the
County of Middlesex, Clerk, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to an improved construction of hypodermic syringe.
In syringes as at present constructed the body portion is usually of glass, and
to protect this we employ a light perforated or skeleton metal casing, which while
protecting the glass will yet allow the graduations to be seen, and will at the same
time afford a means for attaching the necessary cap at the top and nozzle below,
instead of, as usual, having them attached to the glass body.
For this purpose the casing is continued to a point so that the nozzle may be
thrust onto same, and is so constructed that the glass body may be simply dropped
into it, when it will be secured therein by the cap.
The piston rod may be conveniently made in two parts, one being an outer tube
in which slides a rod between the end of which and the tube is carried the packing.
By means of a nut working on a screwed portion of the rod the latter may be
drawn up and the packing thus adjusted.
Dated this 24th day of December 1891.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Hypodermic Syringe.
We, SILAS MAINEVILLE BURROUGHS and HENRY SOLOMON WELLCOME both
of Snow Hill Buildings in the City of London, Manufacturing Chemists, and
Merchants, and STANLEY READ SLATER of 104 Cricketfield Road, Clapton in
the County of Middlesex, Clerk, 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:—
Our invention relates to an improved hypodermic syringe, the object of same
being to provide means for the combined protection of the graduated glass body
It also
and for the affixing of the needle and cap to the body of the instrument.
relates to the construction of the piston and connected parts in such a manner that
they may be readily adjusted and removed for cleaning purposes.
Our invention is illustrated in the accompanying drawing in which:-
Fig. 1 is an elevation of our improved syringe.
Fig. 2 is a longitudinal section of same."
Fig. 3 is a cross section taken on the line x-x Fig. 2, and
Fig. 4 is a similar section taken on the line y-y Fig. 2.
The syringe is provided with the usual graduated glass body a, and over this is
placed a light metal casing b having a cut away face and back as shown so as to
expose the glass body and its contents, or one face only may be cut away or the
casing may be made open in parts otherwise than as shown in the drawing. This
casing affords a protection to the glass body a, and also as will be seen, by reason
of its tapered end or nozzle c, affords a means of affixing the usual
d and
cap

page_text: needle e which are slipped on to same instead of as usual on to the tapered end of
the glass body, or on to a metal cap and nozzle held thereon.
In place of this tapered end we make the glass body with a blunt or cut off end,
as shown, and place around the contraction of same a rubber or like ring or
washer which prevents the glass from moving about in the casing and affords a
tight joint which will prevent leakage.
The glass is retained in the casing by means of a cap g which is screwed on to
this latter.
The cap has a passage through same through which passes the tubular piston
rod h, said piston rod carrying a rubber or other piston i, and a rod j having a
cap. This rod j must be prevented from turning in the piston h, and to accomplish
this we prefer to remove a portion of the metal of the rod j so as to form a flat
face, as clearly shown in Figs. 2, 3 and 4, and to pinch up the tubular piston / at
the point as shown, so that while capable of sliding therein the rod is not able to
turn. The other end of the rod is screwed and carries a nut k, and at its extreme
end a suitable handle m. The nut kabuts against the piston h, and it will be seen
that by turning same the rod i will be raised or lowered, and the piston i be
consequently compressed or released so that its tightness in the glass body may be
regulated.
By unscrewing the cap g the piston and rods may be removed and by removing
the nut and handle m the rod j may be removed from the piston h for cleaning
or other purposes.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A syringe comprising a protecting casing having a cut-away portion, a nozzle
and retaining cap secured to the casing, a glass body fitting the casing having a
reduced end, and a washer interposed between the reduced end of the body and
casing, substantially as described.
2. A syringe comprising a projecting casing having cut-away portions, a nozzle
and retaining cap connected to the casing, a glass body fitting the casing, a tubular
piston rod having a contracted portion, and carrying a compressible piston, a
screw rod sliding in said piston and having a flattened face corresponding to the
contracted portion of the piston rod, a cap and an adjusting, nut and handle,
substantially as described.
Dated this 24th day of Santamber 1802
PHILIP M. JUSTICE, Fel. Chart. Inst. P.A.,
55 & 56, Chancery Lane, London, Agent for the Applicants.