Improvements in the Construction and Manufacture of Syringes for Medical and other Purposes.
Year: 1896

page_text: Date of Application, 17th Feb., 1896
Complete Specification Left, 5th Nov., 1896-Accepted, 19th Dec., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Construction and Manufacture of Syringes for
Medical and other Purposes.
I WILLIAM EDWARDS GRAY of Boston Street, City of Sheffield Surgical
Instrument Maker do hereby declare the nature of the invention communicated to
me from abroad by H. Wulfing-Lüer, 6 Rue Antoine-Dubois, Paris, France to be
as follows:-
This invention relates to improvements in the construction or manufacture of
syringes, such as are chiefly made of glass for medical purposes but which may
be used for kindred purposes and in some cases are made of other materials.
The object is to construct a syringe which has no removable parts, such as
glands or stuffing boxes, and which may be without difficulty kept perfectly clean
and anti-septic, and I therefore propose to construct a syringe in two parts only, and
preferably of glass.
I make a cylinder of glass, the interior of which is dressed perfectly true and
parallel from end to end, the ejecting end being pointed or otherwise formed for
the required purpose.
The piston is cylindrical and may be either solid or hollow, it is also ground or
otherwise dressed to fit the interior of the cylinder, the annular space between the
two parts being such as will produce capillary action.
A syringe so constructed requires no packing of asbestos or the like, as its
operation is perfect and reliable, it can be kept perfectly clean and anti-septic, and
is of the simplest construction possible.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
Improvements in the Construction and Manufacture of Syringes for
Medical and other Purposes.
I, WILLIAM EDWARDS GRAY of Boston Street, City of Sheffield Surgical
Instrument Maker do hereby declare the nature of this invention and in what
manner the same has to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention which has been communicated to me from abroad by H. Wulfing
Lüer, of No. 6 Rue Autoine-Dubois, Paris, France, relates to improvements in the
construction or manufacture of syringes such as are chiefly made of glass for
medical purposes, but which may be used for other kindred purposes, and which in
some cases are made of other materials.
The object of the invention is to construct a syringe which has no detachable

page_text: parts such as glands, stuffing boxes, packings or the like, and which may without
difficulty be kept perfectly clean and anti-septic.
A syring constructed according to my invention, and carrying out the above
objects is shown in the annexed drawings; similar letters refer to similar parts in
any of the several figures.
Fig. 1, represents the cylindrical plunger.
Fig. 2, represents the barrel of the syringe.
Fig. 3, represents both the plunger and the barrel in position for use.
I prefer to construct both parts of the syringe of glass, the plunger A, and the
barrel or cylinder B, being the only two constituent parts, acting without glands
or packing of any description.
The barrel or cylinder B, Fig. 2, is made in one continuous piece of glass, the
tubular interior being ground or dressed out perfectly true and cylindrical from
end to end, the ejecting end being pointed or otherwise formed at C, for the
required purpose.
The plunger or piston A, is cylindrical, and may be either hollow or solid, it is
also ground or otherwise made true to fit the interior of the cylinder or barrel B,
the annular space between the two parts A and B, being such as will produce
capillary action.
A syringe carefully constructed as above described requires no packing of
asbestos or the like, and its operation is perfect and reliable; it can therefore be
kept perfectly clean and anti-septic with the least possible trouble and with
certainty.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim, is :-
1. A syringe of glass, constructed of two parts only, in the manner hereinbefore
described and set forth.
2. A syringe, in which the principle of capillary attraction is used between the
plunger and the cylinder or barrel, so as to dispense with packing, as hereinbefore
described and set forth.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.