Improvements in Gas Brackets, Chandeliers, Gasaliers, or the like.
Year: 1889

page_text: Date of Application, 5th Apr., 1889
Complete Specification Left, 6th Jan., 1890-Accepted, 8th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in Gas Brackets, Chandeliers, Gasaliers, or the like.
We, JOHN WATKINSON of 48 Margaret Street, Plumber, and THOMAS DODD of
8 Stanley Street, Brass Founder, botli in Liverpool in the County of Lancaster, do
hereby declare the nature of this invention to be as follows:-
- Chandeliers and other like stems or dependent tubes having branches tipped with
gas burners, have generally hitherto been constructed of two tubes, one within the
other and arranged to slide telescopically so as to adjust the length as required, the
weight of the outer tube, branches, globes, etcetera, being balanced by means of weights
suspended by chains which are passed over pulleys and attached to the outer tube
aforesaid. The escape of gas between the two tubes (which are generally a loose fit)
has generally been prevented by the employment of water. Serious accidents have
sometimes occurred by the breaking of said chains and the consequent escape of gas.
In the gas bracket we have designed, an accident of this nature is impossible.
We employ two telescopic tubes similar to those hitherto used, but we provide one
of them with a packing which can be swelled so as to press or bear against the surface
of the other tube and make a tight joint, which, while preventing the escape of gas,
does not prevent the tubes sliding telescopically one within the other.
At or near
the extremity of the inner tube we screw or otherwise attach a collar whose outer
diameter is rather less than the inside diameter of the outer tube, but is greater than
the inside diameter of the joint packing aforesaid. The said collar does not therefore
prevent free telescopic motion, but it effectually prevents the two tubes being
accidentally separated.
A
In the model we have constructed (which however is described merely as an
example) we make a cavity or recess at the end of the outer telescopic tube and
surrounding the inner tube, or preferably in a cap which is screwed to the end of said
outer tube, so as to be removable. In this cavity are placed annular washers of
flexible or elastic material, and preferably on the top of these, a metal washer.
gland or its equivalent is then screwed into the recess or cavity aforesaid and is made
to squeeze or swell the washers against the tube. In this gland is provided a recess
into which is screwed another gland, or its equivalent, and this also has a recess
into which is screwed a third gland. Into each of the recesses are inserted
washers or any other suitable packing, and when the glands are respectively
screwed down the packing is swelled against the inner tube and makes an effective
joint which prevents gas leakage, but does not prevent telescopic movement.
Washers are also preferably provided between the flanges of the glands or caps.
Balance weights may, if desired, be dispensed with, the friction being sufficient to
hold a pendent gasalier in position. Any other suitable number of glands and
packing may be used instead of three.
Gas stems or brackets applicable for attachment to a wall or other vertical or
approximately vertical support may be constructed in a similar way.
Dated thin 4th ..
A 1000
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Gas Brackets, Chandeliers; Gasaliers, or the like.
We, JOHN. WATKINSON of 48, Margaret Street, Plumber and THOMAS DODD of
8, Stanley Street, Brass Founder, both of Liverpool, in the County of Lancaster, 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 —
Chandeliers and other like stems or dependent tubes, having branches tipped with
gas burners, have generally hitherto been constructed of two tubes, one within the
other and arranged to slide telescopically so as to adjust the length as required, the
weight of the outer tube, branches, globes, etcetera, being balanced by means of weights
suspended by chains which are passed over pulleys and attached to the outer tube
aforesaid. The escape of gas between the two tubes (which are generally a loose fit)
has usually been prevented by the employment of water. Serious accidents have
sometimes occurred by the breaking of said chains and the consequent escape of gas.
In the gas bracket we have designed, an accident of this nature is impossible.
Our invention may be described by reference to the accompanying drawings, in
which
Figure 1 is a central vertical section, and
Figure 2 an elevation..
We employ two telescopic tubes A B similar to those hitherto used, but .we
provide one of them with a packing which can be swelled so as to press or hear
against the surface of the other tube and make a tight joint, which, while preventing
the escape of gas, does not prevent the tubes sliding telescopically one within the
other. At or near the extremity of the inner tube A, we screw or otherwise attach
a collar a whose outer diameter is rather less than the inside diameter of the outer
tube, but is greater than the inside diameter of the joint packing aforesaid. The said
collar does not therefore prevent free telescopic motion, but it effectually prevents
the two tubes being accidentally separated.
In the arrangement which is illustrated in the drawing (and is shown merely as
an example) we make a cavity or recess at the end of the outer telescopic tube B and
surrounding the inner tube A, or preferably we form a cavity c in a cap C which is
screwed to the end of said outer tube B so as to be removable, the joint being rendered
gas-tight by a leathern or similar washer c. In this cavity there is placed an annular
washer (or washers) d of flexible or elastic material, and on the top of this washer
a metal washer may also be placed. A gland C¹ or its equivalent is then screwed
into the recess or cavity c aforesaid and is made to squeeze or swell the washer d
against the tube A, as shown. In this gland is provided a recess c² into which is
screwed another gland C2, or its equivalent, and this also has a recess cinto which
is screwed a third gland C³. Into each of the recesses c².c³ are inserted elastic or
compressible washers d' d² or any other suitable packing, and when the glands are
respectively screwed down by means of a key placed upon the facets c¹ or by other.
means, the packing is swelled against the inner tube, as shown, and makes an
effective joint which prevents gas leakage, but does not prevent the telescopic move-
ment of the tubes.. Washers ee are also preferably provided between the flanges of the
glands or caps. F is an ornamental cup fixed on the outer tube B and having two
or more perforated lugs f, for the purpose of attaching the chains of the balance
weights. The latter may, if desired, be dispensed with, the friction between the
tube A and the packing being sufficient to hold a pendent gasalier in position. Any
other suitable number of glands and packing may be used instead of three. The
upper end of the tube A may be connected with the supply pipe by means of a ball
joint G of any well known description.
Gas stems or brackets applicable for attachment to a wall or other vertical or
approximately vertical support may be constructed in a similar way.

page_text: Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
In a chandelier or the like having a telescopic suspension or supporting appliance
of the kind described, a packing device consisting of two, three or more glands
screwed one within the other and adapted to press a corresponding number of
flexible packing rings or their equivalent against the surface of the inner telescopic
tube, substantially as described.
Dated this 4th day of January 1896.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester and London, Patent Agents.