Improvements in Sockets or Holders for Incandescent Lamps.
Year: 1890

page_text: wate of Application, 10th Nov., 1890-Accepted, 13th Dec.
1800
COMPLETE SPECIFICATION.
Improvements in Sockets or Holders for Incandescent Lamps.
I, JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex,
Gentleman do hereby declare the nature of this invention (which has been com-
municated to me from abroad by James Walter Collier of New York City, New York
State, United States of America) and in what manner the same is to be performed to
5 be particularly described and ascertained in and by the following statement :-
The incandescent lamp socket or holder in which this invention consists is one
which is made from plastic non-conducting material such as hard rubber, having
moulded and imbedded in the body of the material of which it is composed the
insulated wires by which it is connected to the outside circuit.
In the accompanying drawing-
Figure 1 is a side elevation of an incandescent lamp embodying my invention.
Figure 2 is a longitudinal axial section of the holder, dissociated from the lamp and
its enclosing globe.
Figures 3 and 4 are a side elevation and longitudinal axial section respectively of a
slightly modified form of holder.
The body A of the holder is made from a plastic non-conducting material-such as
hard rubber which is capable of being moulded into form. It is formed with a
socket a, which in the present instance is internally screw threaded, to receive the
correspondingly screw threaded neck of the lamp B; and in the wall and base of this
socket are the metallic contacts b, c, which are to meet and make connection with the
lamp contacts in the customary way when the lamp is screwed home in the socket.
The internal form and dimensions of the socket proper a, as well as the location of the
contacts b, c, therein will of course vary according to the particular kind of incan-
descent lamp to be used therewith. Fixed to the contacts b,
connection therewith are the circuit wires d, e, which are shown in the drawing are
so as to be in electrical
covered and protected by the usual insulation or insulated covering. All of these
parts, b, c, d, e, are moulded and embedded in the holder during the operation of
forming the latter, and by the subsequent vulcanizing are most firmly and permanently
held therein. The body of the holder is moulded in a solid mass around these contact
pieces and wires, there being no opening in the base of the holder, but the rubber
being moulded and vulcanized solidly around the wires which with their insulated
overings extend out from the base of the holder to any length desired so that they
nay be connected up in the circuit in which the lamp is to be placed.
This feature is material and of importance because thereby I obtain an incan-
escent lamp holder which can be used in damp and wet localities, and under
ater, with the least possible danger of being injured by oxidation and other
jurious influences. The base and indeed the whole body of the holder is
solutely closed against atmospheric influences or water. The usual opening in
e base for its attachment to a bracket or support is absent, the only things which
oject through that base are the circuit wires, which themselves have the
stomary insulated covering, and these wires are moulded into the body of the
lder so as to constitute in effect an integral part thereof, the joint between
e wires and the holder being hermetically sealed against any outside influences, by
son of the fact that the material of which the body of the holder is composed
moulded and baked around these wires. The wires serve not only as electrical
nections, but also as the means whereby the holder is mechanically attached
1 upheld in place.
The holder shown in Figures 1 and 2 is more particularly designed for submarine
subaqueous purposes. The exterior of the holder is screw threaded as at f to
ive a globe C, the internally screw threaded neck of which screws unon th
Price but I

page_text: holder until it brings up against the shoulder or flange g. By sealing the joint
between the neck and the flange, entrance of water can be wholly prevented.
In the holder shown in Figures 3-4 (designed more particularly for street use)
there is upon the exterior of the holder a screw threaded portion upon which
screws a clamping collar i. The neck of the shade used in connection with this
holder, is clamped between a shoulder on the holder, and the clamping collar i.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. An incandescent lamp socket or holder made from a plastic non-conducting
material such as hard rubber having solidly moulded and embedded in it the holder
contacts and the circuit wires for connecting said contacts with the outside circuit, said
holder having a solid hermetically closed base, through and beyond which project the
said circuit wires, around which the body of the holder is embedded, as and for the
purposes herein before set forth.
2. An incandescent lamp socket or holder made from plastic non conducting
material such as hard rubber having moulded and embedded in the body of the
material of which it is composed, the insulated wires by which it is connected to the
outside circuit, substantially as and for the purposes hereinbefore set forth.
Dated this 10th day of November 1800
J. H. JOHNSON & Co.,
Agents.