IMPROVEMENTS IN GAS PIPE CONNECTIONS, ESPECIALLY ADAPTED FOR REMOVABLE STAND-PIPES
Year: 1886

page_text: миргоѵешены ш став про сонносподь, поро
Removable Stand-pipes.
I, JOHN SURL of the Gas Works, Tewkesbury, in the County of Gloucester,
Gas Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS
IN GAS PIPE CONNECTIONS, ESPECIALLY ADAPTED FOR REMOVABLE STAND-PIPES,"
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawings, and to the letters and figures marked thereon, that is to
Bay :-
The object of this invention is to provide means whereby the loss of gas by the
connecting and dis-connecting the taps of street lamps, stand-pipes for market
lights, smith's anvils, engine pit lights, and other gas connections that are frequently
removed or that may be required for temporary lights, may be avoided.
The invention consists in inserting in a recess in a block of wood, stone, or other
suitable material A, Fig. 1 (which is a sectional elevation) that is laid in the pave-
ment, floor or ground, the casting B, which has a hexagonal, square, or other
appropriate shaped flange C Figs. 1 and 2, at the top so that when fitted into the
recess it cannot be turned round. The casting B is screwed on the inside with a
female thread, so as to admit of the reception of the plug D, which has a male
thread on the upper part of its periphery. This plug is contracted and made into
a square shank at its lower part E, but has a vertical hole extending through its
centre. The plug is shown in elevation in Fig. 3. Beneath the plug D there is a
nipple F with a square recess in its centre so as to receive the square part E of
the plug D. This nipple F is also screwed on the upper part of its periphery, and
contracted at the lower part G into a round hollow stem closed at bottom, but
having a small hole H in its side. The nipple is seen in elevation in Fig 4.
Within the casting B there are three discs I, J and K,-I and J being formed of
metal, while K is made of india-rubber or other suitable material. The metal
discs I Fig. 1 and J Figs. 1, 5, and 6 have a screw thread on each of their peripheries
and are screwed with a forked turnscrew into the position shown in Fig. 1. The
lower part of the disc I is countersunk so as to admit of gas passing from the
service pipe L to the hole H in the direction of the arrows. The stand-pipe M is
shown in elevation and disconnected from the plug, but the plug and nipple are
exhibited in the position when the gas can pass to the stand pipe. The stand-pipe

page_text: and plug are screwed or fixed tightly together so that the removal of the stand
pipe will cause the plug D to be drawn out of the casting B with it, and in the
action of unscrewing, it will have the effect of turning the nipple and raising the
stem until the small bole H is surrounded by the india rubber or other suitable
disc, when the supply will be completely cut off. On screwing in the stand-pipe,
the reverse action takes place, the nipple being made to turn the opposite way
until the hole H descends below the india-rubber disc when gas can pass freely to
the burner. Figs. 7 and 8 represent a cap made with a square recess in the centre
and is used for covering the opening in B when the stand pipe is removed. Fig. 9
is a modification in the form of the connection, is adapted for street lamps and is
shown in section, the outer part N being hexagonal as exhibited in elevation
in Fig. 10, and in plan in Fig. 11, so as to enable the operator to hold this
part firmly by means of a spanner, while the upper part is being connected' or
disconnected.
The apparatus may be made of any suitable metal and by its use all loss from
leakage is effectually prevented.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is,
The construction of connections for the purposes herein set forth and in the
manner herein described and shown on the drawings.