A New or Improved Vent Plug for Barrels and such like Uses.
Year: 1896

page_text: Date of Application, 5th May, 1898
Complete Specification Left, 8th Jan., 1897-Accepted, 13th Feb., 1897
PROVISIONAL SPECIFICATION.
A New or Improved Vent Plug for Barrels and such like Uses.
I, GEORGE HARRY WILLIAM DAVIS trading as G. H. W. Davis & Co. of
Edgbaston Works, Gough Road Birmingham in the County of Warwick, Lamp
Manufacturers, do hereby declare the nature of my said invention to be as
follows:-
My invention has for its object a new or improved vent plug for barrels and such
like uses which can be quickly applied and most conveniently operated.
I make my vent plug from a tube or a casting of metal, whether brass or other
suitable material which may be plated. The part which passes into the barrel is
screwed with a coarse thread and is slightly tapered finishing with a collar with
projections on the edge by which it is screwed into the barrel. Above the collar
the tube may rise to any convenient length the top end finishing with a disc through
which an air hole passes some distance from the centre. A sleeve screws over this
with a hole through the centre of the cap and a washer underneath to seal the hole.
When the cap is unscrewed the air passes through the centre hole of the cap and
into the vent plug through the before mentioned side hole. Another mode is to
make a hole through the centre of the tube and put a screw nipple under the cap
and a washer to cover the side hole when the cap is screwed down. By another
modification a plunger is put into the top of the tube with a valve fitting under the
cap and a coiled spring always forcing the valve against the inner side of the cap.
By pressing the plunger down air is admitted.
Dated this 4th day of May 1896
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.
A New or Improved Vent Plug for Barrels and such like Uses.
I, GEORGE HARRY WILLIAM DAVIS trading as G. H. W. Davis & Co. of
Edgbaston Works Gough Road Birmingham in the County of Warwick Lamp
Manufacturers do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :-
My invention has for its object a new or improved vent plug for barrels and such
like uses which can be quickly applied and most conveniently operated.
I make my vent plug from a tube or a casting of metal whether brass or other
suitable material which may be plated. The part which passes into the barrel is
screwed with a coarse thread and is slightly taper finishing with a collar with
projections on the edge by which it is screwed into the barrel. Above the collar
the tube may rise to any convenient length the top end finishing with a disc through
which an air hole passes some distance from the centre. A sleeve screws over this
with a hole through the centre of the cap and a washer underneath to seal the hole.
When the cap is unscrewed the air passes through the centre hole of the cap and
into the vent plug through the before-mentioned side hole. Another mode is to

page_text: make a hole through the centre of the tube and put a screw nipple under the cap.
and a washer to cover the side hole when the cap is screwed down. By another
modification a plunger is put into the top of the tube with a valve fitting under the
cap and a coiled spring always forcing the valve against the inner side of the cap.
By pressing the plunger down air is admitted.
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto a sheet of drawings upon which
I have illustrated two modes of making and mounting the parts but it must be
understood that the general design of the parts may be considerably varied with
the same or similar effect.
Figure 1 is a side elevation of one of my vent plugs ready to be screwed into
the barrel.
Figure 2 is a sectional side elevation of the same device as shown in elevation by
Figure 1.
Figure 3 is a plan of the vent plug as shown by Figures 1 and 2.
Figure 4 is a side elevation of my vent plug when worked by the action of a
spring.
Figure 5 is a sectional elevation of Figure 4.
My vent plug may be made from a casting or stamping A. forming the lower or
Fody part with the coarsely screwed taper end as for tapping into the side or end
of the barrel. The projecting horns a form convenient handles for screwing and
unscrewing. The portion a³ may be made in one casting or stamping with A or a
separate piece united to A but in either case there is a screw thread a provided on
to which the cap thread of B screws. A hole a is drilled or otherwise formed
in A finishing with the diagonal hole a which issues at the top of a³ eccentric to
its centre. The cap B has a projecting and milled edge 61 for operating B and a
hole issuing through the top. There may or may not be a leather or other
washer or ring either on the end of a³ or under the inside of the cap B. The action
is very simple as when the cap B is screwed down the vent is sealed simply because
the hole 63 and a are not opposite to each other but immediately the cap B is
unscrewed slightly the air finds its way over the end of a between the cap B and
so enters the barrel through the passage a
The modification shown by Figs. 4 and 5 do not vary much in shape but the
lower portion or body A has a tube T fastened into it or the tube may be one
with it. The hole a of course is continued by the tube T the top end t¹ of which
forms the sent for the spring cap B. In this modification B has no hole such as 63
through the top but a washer or pad P is provided when necessary to make a joint
upon the top of the tube T. A collar t is fixed to the tube and a spring S is
mounted around the tube and is confined by the inner flange 6 so that its normal
tendency is to hold B down upon the top of T. The action is simple as it is only
necessary to lift the cap B when the air rushes past t³ and so into the tube and
down the passage a into the barrel.
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 :-
First. The new or improved vent plug consisting of the part A for attachment
to the barrel in combination with the cap B substantially as herein set forth in
regard to Figures 1 to 3 upon the accompanying drawings.
Second. The new or improved vent plug consisting of the part A for screwing
into the barrel in combination with the spring cap B substantially as herein
described in regard to Figures 4 and 5 upon the accompanying sheet of drawings.
Dated this 7th day of January 1897.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent.