An Improved Method and Means for Retaining Air or Gas in, or Releasing Air or Gas from, an Inflated Tube or Bag.
Year: 1891

page_text: Date of Application, 17th Feb., 1891
Complete Specification Left
17th Nov
1891-Accepted. 19th Dec., 1891
PROVISIONAL SPECIFICATION.
An Improved Method and Means for Retaining Air or Gas in, or
Releasing Air or Gas from, an Inflated Tube or Bag.
THOMAS WILSON ROBERTSON 184 Grosvernor Street Belfast Ireland Mechanical
Engineer do hereby declare the nature of this invention to be as follows:
It is a valve made in metal, wood or vulcanite or other suitable material and is
composed of two hollow bolts a washer and a plug. One bolt is fastened into the
air tube by means of the washer. The hole through this bolt is of a larger
diameter at one end than at the other and the larger part is threaded or screwed
so as the second bolt which is externally threaded may fit or screw into. The plug
referred to which is preferably indiarubber is placed inside the first mentioned
bolt between the part where the smaller hole starts and the point of the second
mentioned bolt and prevents the air or gas escaping when the inner bolt is screwed
tight. By simply unscrewing this inner bolt the air or gas is released and allowed
to escape.
THOMAS WILSON ROBERTSON.
COMPLETE SPECIFICATION.
An Improved Method and Means for Retaining Air or Gas in, or
Releasing Air or Gas from, an Inflated Tube or Bag.
THOMAS WILSON ROBERTSON 184 Grosvernor Street, Belfast, Ireland
Mechanical 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 :-
It is a valve, made in metal wood or vulcanite or other suitable material, and is
composed of two hollow bolts, a washer and a plug, one bolt is fastened into the
tube by means of the washer, the hole through this bolt is of a larger diameter at
one end than at the other, and the larger part is threaded or screwed so as the
second bolt which is externally threaded may fit or screw into the plug referred to
which is preferably india-rubber is placed inside the first mentioned bolt between
the part where the smaller hole starts and the point of the second mentioned bolt,
and prevents the air or gas escaping, when the inner bolt is screwed up tight.
By simply unscrewing this inner bolt, the air or gas is released and allowed to
escape.
In order that my said invention may be the better understood I append the
accompanying sheet of drawings figs. and letters correspond throughout.
Fig. 1 shows a cross sectional view of the valve and how it is fitted into the
inflatable tube or bag.
Fig. 2 is a modification of Fig. 1 in cross section.
In Figs. 1 and 2 A is a hollow bolt forming the body of the valve it is threaded
externally to fit nut E and threaded internally to fit bolt B.
In Figs. 1 and 2, B is a hollow bolt threaded externally to fit internal thread
of A and forms the binder for forcing D and D' against the sholder or recess of
hollow bolt A.
In Figs. 1 and 2, C is a washer made of canvas or other suitable material which
goes against the inflatable tube or bag and prevents the nut E cutting through
when being screwed to fasten bolt A in the tube or bag.

page_text: In Figs. 1 and 2 D and D₁ is the plug or stopper and I find it most advan-
tageous to use a combination of metal or wood D with a liner of leather or
india-rubber D¹.
In Fig. 1, D is an elongated shank on stopper D which protrudes through
bolt B and keeps D and D¹ in position.
In Fig. 2 D is an elongated shank on stopper D which is sunk in hollow of
bolt B and keeps D and D' in position.
In Figs. 1 and 2 E is a nut which binds the washer C and tube or bag Fagainst
the head of bolt A.
In Figs. 1 and 2 F is the inflatable tube or bag for the reception of the air
or gas.
In Fig. 1, G is a cap to prevent dust or grit getting into the valve.
In Fig. 2, H is a clamp necessary for inflating valve in Fig. 2 as the air or gas
inlet J is made in the side of bolt A. Through clamp H and against inlet J is
screwed inflata point I.
Having now particularly described and ascertained the nature of my said inven-
tion what I claim is-
First. An improved method and means for retaining air or gas in or releasing air
or gas from an inflated tube or bag by means of a push up stopper substantially as
shown in drawings.
Second. The washer C for preventing the cutting of tube or bag when fastening
valve.
Third. The method of inflating by means of clamp H substantially as shown by
Fig. 2 in drawings.
16th November 1891.
THOMAS WILSON ROBERTSON.