Improvements in Pneumatic Valves for Cycles and Vehicles of All Kinds, or for other Articles that require Pneumatic Valves.
Year: 1895

page_text: Date of Application, 16th Oct., 1895-Accepted, 1st Feb., 1596
COMPLETE SPECIFICATION.
Improvements in Pneumatic Valves for Cycles and Vehicles of All
Kinds, or for other Articles that require Pneumatic Valves.
WILLIAM EDWARD HART Senior, 38 Darlington Street Wolverhampton,
Cycle Manufacturer, Joux ARGRAVE TAYLOR, 10 High Street Wolver-
hampton India Rubber Merchant, WILLIAM EDWARD HART Junior, 178 New-
Hampton Road Wolverhampton Cycle Engineer, 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 improved pneumatic valve is composed of detachable parts, specifically
described as follows;-
1st The principal body of the valve (A) is externally turned, internally
drilled & machined from solid brass or other suitable material into two distinct
chambers, leaving an intermediate partition of material between the upper & lower
chambers. Through the said partition (B) a small air hole is drilled, each
side of which can be thoroughly closed when the valve is in action, as hereafter
described.
The top side of the said partition forms the flat bottom of the upper chamber,
on which is fitted a flat circular washer (C) (of rubber or other suitable material)
having a small central air-hole. The bottom side of the said partition forms the
inverted Vor cone shaped top of the lower chamber, against which is fitted a cone
shaped washer (D) (of rubber or other suitable material) having a small central
air-hole.
The external & internal circumferences of the principal body of the valve are
screw-cut, comprising both the upper & lower chamber. The external part is
screw-cut in order that the usual lock-nuts may be utilized for fixing the valve to
the rim & air-chamber of a pneumatic tyre.
The bottom or base external part of the principal body of the valve is also
formed into a flange, the said flange being the part which is fixed in the usual
manner into the rubber air chamber of a pneumatic tyre.
2nd The secondary body of the valve (E) is also externally turned, screw-
cut & machined from solid brass or other suitable material, in order that it may be
screwed into the upper chamber of the principal body of the valve.
The base of the secondary body of the valve is left solid & is machined perfectly
flat, in order to fit upon the flat circular washer (C), thus, when it is required to be
air tight perfectly closing the air hole of the washer (C) which communicates with
the air-hole which is drilled through the partition to the lower chamber of the
principal body of the valve.
From the top of the secondary body of the valve a small air-hole (1) is drilled,
until within a 64th part of an inch above the solid base, where it is joined to
another small air-hole which is drilled at a right angle from an exterior groove.
The said groove is machined around the circunilerence just above the base in order
to allow a passage for air, when the secondary body of the valve is unscrewed a
little from the upper chamber of the principal budy of the valve, in order to allow
a small space for 100m between the said base & the top of the flat circular
washer (C).
The top of the secondary body of the valve is screw-cut externally to fit into an
ordinary dust-cap; the said secondary body is also provided with a flange milled
or otherwise for the purpose of screwing or screwing it into or out of the upper
chamber of the principal body of the valve.

page_text: -
3rd The lower chamber of the principal body of the valve is furnished with a
round solid plug of aluminium (G) or other suitable material, of which the top is
shaped like a cone, in order to fit perfectly into the hollow conical form of the
washer (D) and thoroughly close the air-hole which leads up to the upper
chamber, & thus prevent the escape of air upwards from an inflated pneumatic
tyre. The base of the said plug is flat, & its circumferential area is made to be
almost a touching fit inside the said chamber.
The said plug is vertically movable, & is a little shorter than the said chamber,
so that it may be forced by air-pressure from a pneumatic inflator from the top of
the said chamber, when it is required to inflate the pneumatic tyre. The said
chamber is also provided with a fixed hollow plug or ring (H) (the base of which
is slotted for a turn-screw to fit into) of brass or other suitable material, which is
screw-cut externally & which is screwed tightly into the open bottom of the lower
chamber, in order that the movable & conical plug of aluminium aforementioned
may be kept confined within the aforesaid chamber. The circumference of each
of the said plugs is grooved vertically on their external surface for the
passage of air. The manner of operating or using the valve is as follows:-
1st The secondary body of the valve is unscrewed two complete turns, in onler
that a minimum of air-room may he left between its solid base & the top of the
flat circular washer (C). 2nd ;-Then the ordinary pump or inflator connection is
screwed over the top of the secondary part of the valve, when the valve may be
operated by the action of the pump or inflator. 3rd-When the inflation of a
pneumatic tyre is completed & the pump is disconnected, the secondary part of the
valve is again screwed two complete turns until its solid flat base again touches
the top of the washer (C), thus remdering the complete & composite valve doubly
air-tight. The manner of operating the valve to deflate a pneumatic tyre is as
follows-1st-The secondary body of the valve is unscrewed completely from
the upper chamber of the principal holy of the valve. 204-Then an ordinary
hair-pin or other suitable piece of wire is pushed through the central air-holes of
the washer (C), of the partition (B), & of the washer (D), & also against the solid
plug (G) sufficiently to move it away from the central air-hole Situated in the
washer (D), when the air will escape, & the tyre will become deflated.
Having now particularly described & ascertained the nature of our sail inven
tion, & in what manner the same is to be performed, we declare that what we
claim is ;-
1st. The principle of the internal part of the principal body of the valve, which
although of one piece is formed into two distinct chambers, connected by a doubly
closable air-hole as describe 1.
2nd. The principle of the secondary part of the valve which although of que
piece acts both as a conductor of air to the upper chamber & also as a plug or key
in order to completely close or lock it.
3rd. The principle of the hollow plug or ring of metal which is screwed into the
open hottom of the lower chamber of the principal body of the valve.
4th. The combined unity of the detachable parts as claimed above when
utilized in the order named in the foregoing descriptions.
Dated this 14th day of October 1895.
WILLIAM EDWARD HART, SENIOR.
JOHN HARGRAVE TAYLOR.
WILLIAM EDWARD HART, JUNIOR.