Year: 1887

page_text: Date of Application, 5th Nov., 1887
Complete Specification Left, 7th Aug., 1888
Complete Specification Accepted, 19th Oct., 1888
We, WILLIAM CLARKE and CHARLES ALGERNON PARSONS, members of the Firm
of Clarke, Chapman, Parsons, & Co., of Victoria Works, Gateshead-on-Tyne, in the
County of Durham, Engineers, do hereby declare the nature of this invention to be as
follows:-
It has been found that the rods or burners of large candle power incandescent lamps
are liable to breakage in transit. Owing to the necessarily considerable length and
weight of the rods or burners, they exercise a good deal of leverage on the point of
contact, with the platinum wire connection, and if the lamp gets a sudden blow such
as might be caused by the packing case in which the lamps are placed being violently
thrown down, the rods unable to stand the great strain are broken off, and the lamp
is rendered useless.
To obviate this breakage, we provide a support which although not in actual contact
with the rod or burner, is in close proximity to it on either side, and being attached to
the glass globe, prevents the burner vibrating except through a very small angle,
and consequently obviates the injurious effects of a sudden blow.
We prefer to attach the support, which is generally in the form of a piece of glass
tube carrying a small fork or forks, to the globe at the point where the lamp is
hermetically sealed. The fork stands on each side of the burner, but not in contact
with it.
Although we prefer this plan, we effect the same purpose by several other means.
We sometimes use a long glass rod or tube with fork as before, and attach the same
to the other end of the lamp (ie., where the platinum wires pass through the globe,)
or we use two or more glass rods or tubes with forks as before, and attach them to
the sides of the globe, or we stretch a glass rod, tube, or metallic wire, or a rod
parily glass and partly wire through the legs of the burner diagonally and attach
them to the sides of the globe.

page_text: In lamps containing more than one burner, we either make a support carrying
several forks or we provide a fork or forks for each burner. Devices such as herein-
above described we in some cases use with globes of lamps in which the rods or
burners are carried by wires arranged partly in glass tubes.
Dated this 5th day of November 1887
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C..
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Electric Incandescent Lamps.
We, WILLIAM CLARKE and CHARLES ALGERNON PARSONS, members of the firm
of Clarke Chapman Parsons & Co., of Victoria Works, Gateshead on Tyne, in the
County of Durham, Engineers, 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 has been found that the rods or burners of large candle power Incandescent
Lamps are liable to breakage in transit. Owing to the necessarily considerable
length and weight of the rods or burners, they exercise a good deal of leverage on
the point of contact, with the platinum wire connection and if the lamp gets a sudden
blow such as might be caused by the packing case in which the lamps are placed
being violently thrown down, the rods unable to stand the great strain are broken off
and the lamp is rendered useless.
To obviate this breakage we provide a support which although not in actual contact
with the rod or burner, is in close proximity to it, on either side and being attached
to the glass globe prevents the burner vibrating except through a very small angle
and consequently obviates the injurious effects of a sudden blow. We prefer to attach
the support, which is generally in the form of a piece of glass tube carrying a small
fork or forks, to the globe at the point where the lamp is hermetically sealed. The
fork stands on each side of the burner but not in contact with it.
Although we prefer this plan the same purpose may be effected by other arrange-
ments without departure from the principle of this invention. For instance we may
use a long glass rod or tube with fork as before and attach the same to the other end
of the lamp (ie. where the platinum wires pass through the globe); or we use two or
more glass rods or tubes with forks as before and attach them to the sides of the

page_text: globe; or we stretch a metallic wire, or a rod partly glass and partly wire through the
legs of the burner diagonally and attach them to the sides of the globe.
In lamps containing more than one burner, we either make a support carrying
several forks or we provide a fork or forks for each burner. Devices such as herein-
above described we, in some cases, use with globes of lamps in which the rods or
burners are carried by wires arranged partly in glass tubes.
Referring to the accompanying sheet of illustrative drawings Figs. 1 and 2 shew
two sectional elevations at right angles to each other, of an incandescent lamp
furnished with a support according to this invention to limit the vibration of the
burner.
A is the globe, B the burner, C a support connected to the globe at the end at
which it is sealed, and limiting the vibration of the burner.
The support C is formed of a glass tube E and the forks D. D. which are of metal,
preferably platinum. They are each twisted round a projection on the tube E, and
may be further sealed into position. The ends of the burner B are fixed to platinum
wires F, F which are surrounded by glass tubes G G.
Figs. 3 and 4 shew in two sectional elevations at right angles to each other, an
incandescent lamp with two burners each provided with a support according to this
invention to limit the vibration of the burner.
The supports OC are formed with a single stem and each support is furnished with
forks DD to limit the vibration of the burner.
We sometimes carry the burners on composite rods, consisting of strong wires of
iron copper, or other suitable metal, with platinum wires securely attached at each
end by brazing, fusion or other process, and to prevent the bending of the platinum
wires at the point where they are fixed through the globe, we support these rods by
passing them loosely through short glass tubes which are securely attached to the
glass globe.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what
is claimed in an incandescent lamp is :-
1. A support so disposed that should the burner be caused to vibrate, the vibration
will be kept within determined and safe limits.
2. We also claim the support described with reference to Figs. 1 and 2 and to
Figs. 3 and 4 of the drawings.
Dated this 7th day of August 1888.
W. LLOYD WISE,
Per F. J. Brougham,
Agent for the Applicants.