An Improved Air Vent Plug for Hot Water Pipes and all kinds of Chambers where it is requisite to have a Vent.
Year: 1892

page_text: Date of Application, 3rd June, 1892
Complete Specification Left, 3rd Mar., 1893-Accepted, 29th Apr.,
1893
PROVISIONAL SPECIFICATION.
An Improved Air Vent Plug for Hot Water Pipes and all kinds
of Chambers where it is requisite to have a Vent.
GEORGE NEWELL MILWARD The Hollies, Antrobus Road Handsworth,
Birmingham Traveller do hereby declare the nature of this invention to be as
follows:-
It is a threaded or screwed plug having a circular or tee shaped top for the
purpose of screwing up or unscrewing, the screwed or threaded portion having
one or more grooves or slots similar to an engineers screw plug tap, with this
difference that the slots or grooves only partially extend, perpendicularly, so that
when it is requisite to allow air to escape, that by unscrewing a few turns the
groove or slot will appear outwardly and thus allow air to escape, and by screwing
up again will render plug air and water tight.
Dated this 2nd day of June 1892.
GEO. N. MILWARD.
COMPLETE SPECIFICATION.
An Improved Air Vent Plug for Hot Water Pipes and all kinds
of Chambers where it is requisite to have a Vent.
GEORGE NEWELL MILWARD The Hollies, Antrobus Road Rookery Road
Handsworth in the County of Stafford Traveller, 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 an improved vent plug whereby a vent may be readily
afforded to hot water or steam pipes, and all kinds of chambers where it is requisite
from time to time to have a vent and whereby the necessity of using pet cocks or
other similar existing vent appliances is obviated.
In order to more fully explain this my invention, I have appended hereunto an
illustrative sheet of drawings upon which are figures and numbers of reference, and
in which :-
Fig. 1, is a view of this my improved vent plug in front elevation.
Fig. 2, is a side view of this my improved vent plug in part section showing the
vent groove or channel.
1, is the plug screw or body part which fits into a screwthreaded hole made in
the pipe or vessel where ventilation is desired. 2, is an india-rubber or other
suitable washer, (where necessary) for perfecting the joint when screwed home and
preventing leakage. 3, is a groove or channel which is made to form a communi-
cation from the bottom or end of the plug to and out at its side towards or at the
upper end of such screwed part. The precise shape or direction of this channel or
groove may of course be varied.
4, is a handle by which the plug can be screwed or unscrewed. While I have
shown this handle 4, yet I may substitute therefor a square or other shape suitable
for spanner or a key, or provide a cross groove so that it may be operated by means
of a screwdriver. In either case it will be seen that as the plug is unscrewed the
upper end of the channel 3, is more or less opened to communicate with the
atmosphere, and thus form a greater or less ventilation to the interior of the pipe
or vessel, whilst by screwing down the said plug such ventilation is shut off.
LD027

page_text: Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
The combination with a vent screw plug or body part 1, of the groove or
channel 3, substantially as set forth and operating as described and shown.
Dated this 2nd day of March 1893.
GEORGE NEWELL MILWARD.