Improvements in Incandescent Electric Lamp Fittings.
Year: 1894

page_text: Date of Application, 8th Feb., 1894
Complete Specification Left. 16th Oct., 1894-Accepted, 17th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Incandescent Electric Lamp Fittings.
I EUGÈNE FRANÇOIS ALEXANDRE SOLEAU, of 127 Rue Turenne, Paris,
France, Manufacturer of Bronzes do hereby declare the nature of this invention to
be as follows:-
Incandescent electric lamps are generally mounted by means of a metal collar
fitting in a holder or socket placed in circuit & whether the connection be made by
means of a bayonet, friction or screw joint, the length and size of the parts is
inconveniently great when the lamp has to be mounted upon an electrolier or other
ornamental fitting.
The object of this invention is to obviate this objection by so connecting the
conductors to the holder as to permit of reducing the length of the latter to a
minimum. The improvement consists essentially in connecting the one conductor
with a central spring pressed stem and passing the other into a circular groove in an
insulating piece so as to make contact directly or through a spring, in the groove,
with the holder or socket.
Reference is to be had to the accompanying drawings forming part of this
Specification in which
Figure 1, is an elevation, and Figure 2 a central vertical section showing the
connections.
Figure 3 is an elevation and plan of the lower part of the socket.
Figure 4 is an elevation and plan of the insulating piece.
Figure 5 is an elevation and plan of the end piece through which the wires
first pass.
Figures 6, to 12, represent a modification Figure 6 being an elevation and
Figure 7 a vertical section of same.
Figure 8 is an elevation and plan of the lamp socket or collar.
Figure 9 is an elevation, Figure 10 a plan and Figure 11 a horizontal section on
line 1-2, of the insulating piece.
Figure 12 is an elevation and plan of the end piece.
The same letters of reference indicate the same parts in all the figures.
a is the end piece, which may be of any form desired and through which pass
the wires b and c, united outside the lamp in a single cable d. One of them, 6 for
example, is connected to a spring pressed plug e, by means of a washer f and nut g
screwing upon a screw threaded metal bush h, fixed in an insulating piece i and in
which the plug e is free to slide. The other wire c passes through the insulating
piece and is received in a groove in the upper side thereof. The insulating
piece i has screw-threaded portions l, m for connection with the end piece a and
the socket n respectively. The latter when screwed home makes contact with the
conducting wire c and binds it in place. The socket n, of which only the lower
portion is shown, has any suitable bayonet screw or other joint for connection with
the lamp collar. When the lanp is fitted in the socket one of its leading-in wires
communicates with the conductor & through the central plug e, while the other is
in communication with conductor c through the lamp collar and the socket n
The central spring pressed plug e enables the lamp to be turned round without
breaking the contact with b even when the parts are connected by screw joints.
In Figures 6 to 12 the wire c is secured in the annular groove k, of the insulating
piece by a semicircular spring o upon which bears either the lower end of the
socket n or the collar of the lamp. g is a nut of insulating material screwing on

page_text: the bush h. The socket may be dispensed with by providing the lamp collar with
a female screw screwing directly upon the insulating piece i.
The one leading-in wire r of the lamp commmunicates with the conductor b
through the central plug e, while the other s is in communication with the
conductor e through the spring o, the lamp collar and socket n.
ი.
As in the former
case the central spring pressed plug e and the semicircular spring o allow of the
lamp being turned round without breaking contact with the wires bc. The socket,
or the collar if no socket be used as in Figures 6 to 12 may be covered exteriorly
with an insulating material p.
It is to be understood that the dimensions and forms of the various parts
constituting my improved system of mounting lamps may be varied, as also the
materials employed in their manufacture without departing from the nature of the
invention.
Dated this 8th dox of Wah-u1904
E. F. A. SOLEAU,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents..
COMPLETE SPECIFICATION.
Improvements in Incandescent Electric Lamp Fittings.
EUGENE FRANÇOIS ALEXANDRE SOLEAU, of 127, Rue Turenne, Paris,
France, Manufacturer of Bronzes, 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 :-
Incandescent electric lamps are generally mounted by means of a metal collar
fitting in a holder or socket placed in circuit and whether the connection be made
by means of a bayonet, friction, or screw joint, the length and size of the parts is
inconveniently great when the lamp has to be mounted upon an electrolier or other
ornamental fitting.
The object of this invention is to obviate this objection by so connecting the
conductors to the holder as to permit of reducing the length of the latter to a
minimum.
The improvement consists essentially in connecting the one conductor with a
central spring pressed stem and passing the other into a circular groove in an
insulating piece so as to make contact directly or through a spring in the groove,
with the holder or socket.
Reference is to be had to the drawings accompanying my Provisional Specification
in which
Figure 1 is an elevation and Figure 2 a central vertical section shewing the
connections.
Figure 3 is an elevation and plan of part of the socket.
Figure 4 is an elevation and plan of the insulating piece.
Figure 5 is an elevation and plan of the end piece through which the wires
first pass.
Figures 6 to 12 represent a modification; Figure 6 being an elevation, and
Figure 7 a vertical section of same.
Figure 8 is an elevation and plan of the lamp socket or collar.
Figure 9 is an elevation, Figure 10 a plan, and Figure 11 a horizontal section,
on line 1-2, of the insulating piece.
Figure 12 is an elevation and plan of the end piece.
The same letters of reference indicate the same parts in all the figures.
a is the end piece, which may be of any form desired and through which pass
the branch leads or conductors b and c, one of which, b for example, is connected
to a spring pressed stem e by means of a washer fand nut g screwing upon a screw

page_text: threaded metal bush fixed in an insulating piece i and in which the stem e is
free to slide, whilst the other c passes through the insulating piece i and is
received in a groove & in the upper side thereof. The insulating piece i has screw
threaded portions l, m, for connection with the end piece a and the socket n
respectively. The latter when screwed home makes contact with the wire c and
binds it in place. The socket n, of which only the lower portion is shewn, has any
suitable bayonet screw or other joint for connection with the lamp collar. When
the lamp is fitted in the socket, one of its leading-in wires is in electrical connection
with 6 through the central stem e while the other is in communication with c
through the lamp collar and the socket n. The central spring pressed stem e
enables the lamp to be turned round without breaking the contact with, even
when the parts are connected by screw joints.
C
In Figures 6 to 12, the wire c is secured in the annular groove k of the insulating
piece i by a semi-circular spring o upon which bears either the lower end of the
socket n or the collar of the lamp. g is a nut of insulating material screwing on
the bush . The socket may be dispensed with by providing the lamp collar with
a female screw screwing directly upon the insulating piece i.
The one leading-in wirer of the lamp communicates with the conductor >> through
the central stem e, while the other wire s is in communication with the conductor c
through the spring o, the lamp collar and socket n. As in the former case, the
central spring pressed stem e and the semi-circular spring o allow of the lamp.
being turned round without breaking contact with the wires b, c. The socket, or
the collar if no socket be used, may be covered exteriorly with an insulating
material p.
It is to be understood that the dimensions and forms of the various parts.
constituting my improved system of mounting lamps may be varied, as also the
materials employed in their manufacture without departing from the nature of the
invention.
Having now particularly described aud ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
1st. The herein described holder for incandescent electric lamps wherein the one
conductor is in electrical connection with a central spring pressed stem e and the
other makes contact in an annular grooved insulating piece i with the socket or
collar of the lamp, as hereinbefore described and illustrated in Figures 1 to 5 of
the drawings.
2nd. The herein described bolder for incandescent electric lamps wherein the one
conductor is in connection with a central spring pressed stein e and the other makes
contact with the socket or collar of the lamp through a spring in an annular groove
in an insulating piece i, substantially as hereinbefore described and illustrated in.
Figures 6 to 12 of the drawings.
Dated this 16th day of October 1894.
A. M. & WM. CLARK,
53, Chancery Lane, London, Chartered Patent Agents.