IMPROVEMENTS IN HYPODERMIC SYRINGES
Year: 1884

page_text: I, GEORGE WHYTE, of Northview, Elgin, North-Britain, Doctor of Medicine, do
hereby declare the nature of my said Invention for "IMPROVEMENTS IN HYPODERMIC
SYRINGES"; to be as follows:-
My Invention relates to improvements in the construction of hypodermic
syringes.
The improved hypodermic syringe consists of the usual small barrel of glass or
other material which is fitted with a plug at its end carrying a hollow needle through
which the hypodermic solution is injected. At the opposite end of the barrel is
inserted a hollow plug formed with a disc and collar outside to which is attached a
hollow ball of rubber or similar flexible material, which serves as a pump for
drawing in and expelling the solution from the barrel, in lieu of the usual piston.
The upper end of the ball is fitted with a cap, and through it is passed the end of a
screw nut which is free to turn in it. The nut is retained by a collar formed on it,
which on one side bears on the cap, and at the other is held by screws or similar
devices. Through the nut is passed a spindle, the end of which is screwed to fit
the screw nut, and which extends through the ball and through the hollow plug
into the barrel of the syringe. The lower end of the spindle is square or of similar
shape, and fits the hollow plug, so that the spindle may not turn, while grooves or
channels are formed between the spindle and plug to allow of the passage of air.
When the nut at the upper end of the syringe is turned, the spindle is moved into.
or withdrawn from the barrel, and can be made to regulate or vary the capacity of
the pump. A collar or check is formed on the spindle for this purpose.
The barrel when made of glass or transparent material, may be provided with
graduated scales to indicate the number of drops of solution contained within it.
When the syringe is intended for injecting solutions prepared by dissolving solid
discs or tablets, the regulating screw and screw nut may be dispensed with.

page_text: +
I, GEORGE WHYTE, of Northview, Elgin, North-Britain, Doctor of Medicine, do
hereby declare the nature of my said Invention for " IMPROVEMENTS IN HYPODERMIC
SYRINGES"; and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
My Invention relates to improvements in the construction of hypodermic
syringes, and is illustrated by the accompanying Drawings, in which Figures 1
and 3 are vertical sections, and Figure 2 is a cross section on the line - - y.
The improved hypodermic syringe consists of the usual small barrel A, of glass
or other material, which is fitted with a plug or cap B, which may be screwed or
fixed, at its end, carrying a hollow needle C, through which the hypodermic solution
is withdrawn and expelled. At the opposite end of the barrel is inserted a hollow
plug or cap D which may be screwed or fixed, formed with a disc and collar d
outside, to which is attached a hollow bill E of rubber or similar flexible material,
which serves as a pump for drawing in and expelling the solution from the barrel,
in lieu of the usual piston.
The upper end of the ball is fitted with a cap F, and through it is passed the end
of the screw nut G which is free to turn in it. . The nut G is retained by a collar g
formed on it, which on one side bears on the cap, and a washer may be used to
render it air-tight. Through the. nut is passed a spindle I, the end of which is
screwed to fit the screw nut G, and which extends through the ball and through
the hollow plug D into the barrel A of the syringe. The lower end of the spindle I
is square or of equivalent shape, and fits the hollow plug D, so that the spindle
may not turn; while grooves or channels i, as shown in Figure 2, are formed
through the plug D, close to or out from the spindle I to allow of the passage of
air. When the nut G at the upper end of the syringe is turned, the spindle I is
moved into or withdrawn from the barrel A, a collar or cheek I being formed on
the spindle to regulate the extent of compression of the ball E, and thereby to vary
the capacity of the pump.
The barrel when made of glass or transparent material, may be provided with
graduated scales as shown, to indicate the number of drops of solution contained
within it. When the syringe is intended for injecting solutions prepared by
dissolving solid discs or tablets, the regulating screw and screw nut may be
dispensed with, the cap E being finished as shown in Figure 3.
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,
•
First. The combination of parts forming the improved hypodermic syringe herein
described and illustrated.
Second. The combination in a hypodermic syringe of the barrel and the flexible
ball connected thereto, substantially as herein described and illustrated.
Third'. The combination in a hypodermic syringe of the barrel, the flexible ball,
and the regulating spindle, substantially as herein described and illustrated.
Dated this Seventh day of November 1884.