An Improved Holder for Electric Incandescent Lamps.
Year: 1896

page_text: Date of Application, 22nd Feb., 1896-Accepted, 28th Mar., 1896
.:
COMPLETE SPECIFICATION.
An Improved Holder for Electric Incandescent Lamps.
A communication by PORZELLANFABRIK KAHLA, FILIALE, HERMSDORF-
KLOSTERLAUSNITZ, of Hermsdorf-Klosterlausnitz, Saxe Altenberg, in the
Empire of Germany, Porcelain Manufacturers.
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 31 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 a holder for electric incandescent lamps which
is made of porcelain, glass, or other suitable insulating material, and by means of
which there is obtained a complete insulation of an incandescent lamp suspended
thereon, as well as of the conducting wires connected therewith, and further au
absolute protection against oxidation and short circuiting.
This incandescent lamp holder is particularly suitable for outside lighting and
for use in mines, breweries, cellars, chemical works, acid chambers and the like.
The invention is shown in the accompanying drawings, in which,
Figure 1 shows a vertical section; and
Figure 2 a side elevation of the improved incandescent lamp holder.
The incandescent lamp holder formed of porcelain, glass or other suitable
insulating material consists of a central hollow arm or neck c, having two arms a,
also hollow, branching off laterally at the upper end, the ends or openings of the
arms a being bent downwards. The central arm or neck c is provided at its lower
end with an internal screw thread f into which the electric incandescent lamp B is
screwed. The incandescent lamp may however be secured in the neck by any
other suitable means than screwing. The conducting wires are passed through
the openings b and the hollows of the arms a into the bollow part of the central
arm or neck c and the recesses of the parts a and c are then filled up with a suitable
insulating damp-resisting substance.
The holder A is preferably provided at its lower end with an extension or
flange 9, having an internal screw thread e which may serve for screwing thereto
a protecting glass C or the like surrounding the incandescent lamp B. The
protective glass bell or the like may also be attached to the flange g by cementing
or other suitable means instead of by screwing. In order to allow of the holder
being hung up, a ring d is preferably formed on the upper end thereof.
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 correspondents, I declare that what I claim is :-
1. A holder for electric incandescent lamps made of porcelain, glass or other
suitable insulating material, and consisting of a central hollow arm or neck (c), iu
the lower end of which the incandescent lamp is screwed or otherwise suitably
inserted, and two laterally projecting hollow arms (a) formed on or connected with
the upper end of said hollow neck (c), said arms having open ends (6) projecting
downwards through which latter the conducting wires are passed into the hollows

page_text: of the arms (a) and of the central arm or neck (c), the hollows being afterwards
filled up with an insulating damp-resisting substance substantially as described.
2. In an incandescent lamp holder of the kind described, the arrangement
thereon of a lower flange (g) for screwing or otherwise fastening a protective glass
bell or the like (C) and the provision of a ring (d) at the top for suspending the
holder substantially as described.
Dated this 21st day of February 1896.
WM. P. THOMPSON & Co.,
Agents.