An Improved Suspended Lamp for Incandescent Gas Lighting.
Year: 1897

page_text: Date of Application, 18th Mar., 1897-Accepted, 8th May, 1897
An Improved Suspended Lamp for Incandescent Gas Lighting.
A communication by HERMANN ARNHOLD, of 46, Wasserthorstrasse, Berlin, in
the Empire of Germany.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E, of The Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, 118 New Street, Birmingham, in
the County of Warwick, and 322, High Holborn, in the County of Middlesex,
Civil 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 :-
This invention has for its object an improved suspended lamp or ampulla for
incandescent gas lighting which removes in a simple and convenient manner the
various long felt drawbacks existing in the suspendel lamps hitherto employed,
by means of suitable aids which give the ampulla or hanging lamp a decidedly
novel appearance.
As is well known in the lamps at present used a chain pull weighted with
weights serves for letting down the globe for the purpose of cleaning the same
or changing the burner, which gives rise to frequent complaints.
By the arrangement of the gas cock above the chimney top difficulties and
inconveniences in handling not infrequently arose.
This invention consists in providing, in place of the chain pull, a device by
means of which the taking down of the globe when the same is required to be
cleaned and re-fixing of the same may be effected with less care and anxiety.
A further improvement in the ampulla or swing lamp consists of a gas
regulating tap situated beneath the globe, the peculiar construction of which is
shown in the accompanying drawings. By means of this tap the arrangement of
the igniting pipe (pilot light) is better and considerably more suitable for the use
of incandescent gas lighting. In case an igniting pipe is not desired, the ampulla
body is provided with an automatic self-closing cap which is pushed up by means.
of au
igniting rod.
:
The improved lamp is shown in the accompanying, drawings;
Figure 1 being a vertical section,
Figure 2 a cross section of the globe with guide bärs;
Figure 3 a device for fixing the globe on the fixing ring;
Figure 4 a vertical section showing the construction of the gas tap;
Figure 5 a cross section through the enlarged part B cf the gas tap.
The improved regulating tap consists of a casing A provided in its upper part
with an annular enlargement B for receiving the two branch pipes L as well as
the igniting pipe (pilot light) Z for the burner, and further with a screwed or
threaded extension C, which in turn serves for receiving the burner E or a
T-connection for several burners. Beneath this casing A the actual cock case D
is attached, a hollow extension H of the same being screwed into the casing A.
Two opposite supply pipes for the gas are thus created, the inlet to which may be
controlled by a cock plug O situated in the cock case D and having a suitable
bore to effect the closing or opening of gas admission openings a and b. Under
he cock case a condensed water discharge cap F is provided. As may be seen

page_text: from Figure 4, the igniting pipe Z is inserted in the thickened part B, and is
connected with the outer passage which is constantly filled with gas, and the screw
for regulating the igniting flame is arranged laterally on the extension or thickened
part to allow of its being more easily handled.
The ampulla socket K is first placed on the frame pipe L and the globe is then
passed up from below over the cock body so as to bear against the reflector. As
support for the globe G a set ring R placed on the casing A is employed, as shown
in Figure 4, said ring being provided with an inner annular groove. After the
globe has been raised to a suitable height a sickle shaped disc S connected thereto
and revoluble on a stud S₁ is turned over the casing A above the set ring R,
and the globe allowed to descend. Flanged edges S2 provided on the disc S
penetrate into the annular groove in the set ring R and fix the disc. A rim T
carrying the stud S' is inserted in the globe as a means of holding the disc S to
the globe.
The letting down of the globe takes place by turning the disc S after the
cock, which in the drawing is shown open, has been closed, that is to say, after
the cock lever has been turned down. A further device which is provided on
the upper edge of the globe for guiding and suspending the same now comes
into play. This consists of bars M attached to the edge N of the globe,
which bars are provided with guide-slots for the pipe frame L and hooks J for
suspending the globe on the bottom of the pipe frame L when said globe has
been let down.
The whole construction of the ampulla as compared with those at present in
use, which are difficult to handle and mainly unreliable, is of such considerable
simplicity that the changing of the burner and the cleaning of the globe may be
done without danger.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. A hanging lamp or ampulla for incandescent gas lighting, characterised by a
gas regulating tap situated beneath the globe and formed of a casing (A) provided
at the top with an annular enlargement (B) and a screwed extension (C), said
casing having a tubular piece (H) of smaller diameter screwed therein and if
desired forming one piece with the cock case, the gas passing at the enlargement (B)
out of the pipe frame (L) into the outer passage formed within the casing and
then when the cock is opened being conveyed in the inner passage upwards to the
burner, substantially as described.
2. A hanging lamp or ampulla for incandescent gas lighting, characterised by
the globe (G) being fixed by means of a sickle-shaped disc (S) having an inner
bent down edge or flange (S2) which engages in a groove formed in a set ring (R)
placed on the casing (A) substantially as described.
3. A hanging lamp or ampulla for incandescent gas lighting, characterised by a
slide and suspension device for the globe, which cousists of bars (M) fastened on
the edge (N) of the globe (G) and having guide slots to engage round the pipe
frame (L) and provided with hooks (J) for suspending the globe on the bottom
of the pipe frame, after it has been let down, substantially as described.
Dated this 17th day of March 1897.
WM. P. THOMPSON & Co.,
.Agents.