Improvements in Plungers for Syringes and other similar Pumps.
Year: 1896

page_text: Date of Application, 4th Jan., 1896
Complete Specification Left, 3rd Oct., 1896-Accepted, 14th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in Plungers for Syringes and other similar Pumps.
We, HERBERT STONE, of Bracebridge Street, in the City of Birmingham,
Brassfounder, and HENRY GARDINER ATKINSON, of 47 Murdock Road,
Handsworth, near Birmingham, Pattern Maker, do hereby declare the nature of
this invention to be as follows:-
This invention relates to improvements in the construction and arrangement of
the plungers of syringes and other similar pumps, and consists in the adaptation
and use therefor, of an elastic ball, through the centre of which passes the plunger
rod, so that the said ball abuts against a collar or shoulder, and is somewhat
compressed or Hattened longitudinally by a screw or rivet and thereby expanding
its periphery. This ball is further covered with felt or other suitable substance.
By these meaus a plunger is provided which is simple in construction and affords a
readily yielding quality so that it will easily pass over indentations in the cylinder
caused by damage without impairing the effectiveness of the pump.
Dated this 3rd day of January 1896.
CHARLES T. POWELL,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Plungers for Syringes and other similar Pumps.
We, HERBERT STONE, of Bracebridge Street, in the City of Birmingham,
Brassfounder, and HENRY GARDINER ATKINSON, of 47 Murdock Road,
Handsworth, near Birmingham, Pattern Maker, 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 improvements in the construction and arrangement of
the plungers of syringes and other similar pumps, and consists in the adaptation
and use therefor, of an elastic or resilient ball, through the centre of which passes
the plunger rod, so that the said ball abuts against a collar or shoulder and is
somewhat compressed or flattened longitudinally by a screw or rivet and thereby
expanding its periphery. This ball is further covered with felt or other suitable
substance. By these means a plunger is provided which is simple in construction
and affords a readily yielding quality so that it will easily pass over indentations
in the cylinder caused by damage without impairing the effectiveness of the
pump.
In the accompanying drawing we have illustrated this our invention in which :-
Fig. 1, shows the elastic ball.
Fig. 2, shows a plunger constructed according to this our invention.
4, is the barrel or cylinder of the pump. 5, is the elastic ball. 6, is the covering
of felt. 7, is the collar upon the plunger rod 8. 9, is the screw whereby the ball
is compressed longitudinally, by means of screw nut 10. 11, is a metal washer.

page_text: Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
In a plunger for syringes and other similar pumps the combination with and
adaptation and use therefor of an elastic or resilient ball, constructed and arranged
substantially as set forth and shown.
Dated this lot day of Antaho 1896
CHARLES T. POWELL,
Applicants' Agent.