Improvements in Holders for Incandescent Electric Lamps.
Year: 1898

page_text: Date of Application, 3rd Feb., 1898-Accepted, 5th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Holders for Incandescent Electric Lamps.
We, GEORG JAEGER and HERMANN BENDER, both of Schalksmuhle, Westphalia,
Germany, Manufacturers, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
Our invention has for its object the construction of a socket for incandescent
lamps, which holds enclosed the contact pieces and the switch; all the metallic
parts, with the exception of the protruding contact plungers or other contact
terminals, being imbedded in the insulating body, thereby absolutely preventing,
under ordinary circumstances, shortcircuiting. This construction of socket con-
sequently is especially adapted for circuits, where high voltage is made use of.
In order to make our invention more easily understood, we have illustrated it on
the accompanying sheet of drawings, which will be referred to in the following
description by figures and letters, like letters denoting corresponding parts. We
wish it to be particularly understood, that the scope of our invention is not
restricted to the construction shown in the attached drawings. These latter only
show one way of carrying out our invention; changes in size, material and shape
of the various parts can be made without deviating from the principle involved in
our invention, viz.: the imbedding of all the metallic conducting parts of a socket
and switch, with the exception of the contact terminals, in the insulating body
within any known casing.
On the accompanying sheet of drawings
Fig. 1 represents a vertical sectional view of a "Swan" lampholder with the
insulating body partially cut away.
.
Fig. 2 is a vertical cross-section through the insulating body on line - of
Fig. 1.
Fig. 3 is a front elevation of the switch and
Fig. 4 is a vertical sectional view of the insulating body in combination with an
"Edison" lampholder.
In Fig. 1-3, a is the insulating body, b, b are the plungers; e and f are the two
parts making up the casing; they are held together by the threaded collar 9. The
switch, consisting of the two contact-springs i, i and the contact wheel with the
axle and the outer handle m, is arranged in a recess n, provided in the insulating
body and the axle is prevented from slipping back by the small screw s.
protect the switch against shortcircuiting from without and against dust, the
insulating cover c, having two holes d, d provided for the introduction of the
leading-in wires, is arranged between the insulating body a and the casing.
То
In Fig. 4 the insulating body a encloses in a similar manner the switch and
carries the two contact pieces o, r of the well known "Edison" lampholder type.
The connections between switch terminals, contact pieces and wires are all made
within the insulating body, the latter being provided with bores or channels for
the connecting wires, which are however not shown in the drawings.

page_text: aving now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
In a socket of any type for incandescent lamps an insulating body a, having a
recess n and bores or channels provided for the reception of the switch and the
metallic connections between switch, contact pieces and leading-in wires, said
recess to be covered by the insulating cover c, having holes d, d, substantially as
and for the purpose specified.
Dated this 31st day of T
1000
"