Swing Gas-bracket with Mercurial Seal.
Year: 1890

page_text: Date of Application, 10th Jan., 1890
Complete Specification Left, 10th Oct., 1890-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
Swing Gas-bracket with Mercurial Seal.
I, JAMES STOTT, of Vernon Works, Oldham, Lancashire, Gas Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to a novel arrangement of swing gas bracket with mercurial
seal.
The invention is chiefly intended for use in foundries, workshops, mills, and the
like where moving machinery necessitates the swinging round of the gas branch. It
also enables the gas light to be concentrated or brought to any given spot, some of
the branches being from 6 to 14 feet long.
For the purpose of my invention, I form a cup in a socket and charge it with
mercury, I dip the end of a tee or other pipe into this cup, the top of the tee being
plugged and provided with a pivot pin which has free play in a lug of the back or
wall plate.
The socket has a depending pipe for attachment to the ordinary supply.
In connection with the branch from the swivel tee if the length of the branch
demands it, a stay or tie rod, or chain attached to an upper pin can be arranged to
take the over hanging weight of the branch.
Dated this 10th day of January 1890.
H. GARDNER,
166, Fleet Street, London, Agent for the said James Stott.
COMPLETE SPECIFICATION.
Swing Gas-bracket with Mercurial Seal.
1 JAMES STOTT of Vernon Works, Oldham, Lancashire, Gas Engineer do hereby
declare the nature of my said invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
The object of this invention is to provide a gas bracket for use in foundries, and
erecting shops, factories wharves, warehouses, and other places, to project a sufficient
distance from the wall to bring the light over the centre of the floor space and
which by a simple movement can be swung aside so as to allow of the passage of
travelling cranes, jib cranes, or the erection of machinery.
The ordinary form of gas bracket with ordinary tapered plug swivel joint is only
suitable for short brackets. Excessive leverage caused by an undue length of arm
would speedily wear or grind away the joint and result in an escape of gas.
The present invention provides a form of gas bracket which can be made to any
desired length.
Figure 1 of the annexed drawings is an external elevation of a bracket socket.
Figure 2 a sectional elevation of same showing the dip pipe and the mercury cup.
Figure 3 shows the bracket complete and provided with burner apparatus known
as the Stott-Thorp, the gas being fed from below by a pipe but any form of burner
can be used.
Figure 4 is a sectional elevation of a swing bracket by which the gas can be fert
from above.
The invention according to Figures 1 2 and 3 consists of an iron bracket A formed
with an annular trough B which is charged with quicksilver by the lip C. Working
in this annular trough is the dip pipe D which is kept in position by the pivot
working in the angle bracket F. The supply of gas is admitted at the bottom inlet
of the apparatus marked G whence it passes upwards through the dip pipe D and

page_text: along the arm or pipe H. Any escape of gas is prevented by the seal of mercury in
the trough B.
The overhanging weight of the arm H is carried by a strut or hanger I, working
on a gudgeon J fixed to the wall K at a suitable distance above the mercury joint.
The projecting arm H of the apparatus may be protected from accidental touch or
other movement by a semi-circular weight or curtain L fixed to the wall or to the
plate A by pivots in such a manner that by its weight the arm H is retained at any
desired position.
The lower edge of the weight L may be roughened or notched so as to grip or
clutch and hold the arm.
According to Figure 4 the pivot E is at the bottom and is stepped into the lower
bracket of the wall plate A, the mercury cup being free to move round with the
branch H as well as the dip pipe D.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The construction of wall gas brackets as supports to long arm swing branches
by which gas light can be utilized at any desired spot as described, each bracket
having a mercurial seal cup and dip pipe therein as and for the purposes set forth.
2. The employment of a mercurial trough with dip pipe therein for preventing
escape of gas at the swing branch joint without interfering with the rotative motion
of such branch as described and substantially as shown on the annexed drawings.
Dated this 10th day of October 1890.
H. GARDNER,
Patent Agent, 166, Fleet Street, London, Agent for the said J. Stott.