Improvements in and relating to Incandescence Electric Lamp Sockets and Holders.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Incandescence Electric Lamp
Sockets and Holders.
We, HENRY BEVIS, Electrical Engineer, and JAMES YOUNG FLETCHER, Electrician,
both of 69-71, Queen Victoria Street, in the City and County of London, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to certain improvements in and connected with incandescence
electric lamp sockets or holders. Hitherto, in electric light installations it has been
the custom to remove the lamp when it is desired to divert the electric current for
motive power or other purposes, and the lamp and holder being thus removed, a plug
carrying the branch leads has generally been used to replace said lamp and holder,
making contact with the contacts of the socket. In such cases, as hitherto carried
out the lamp could not be used when the branch leads were in use, and vice versa.
The object of our said invention is to provide means for maintaining the service of
the branch leads and utilising the electric lamp at the same time.
In carrying our invention into effect, we construct a supplementary lamp holder,
which is provided with the spring, plunger, or other contacts within a socket adapted
to the lamp, and the upper part forms a plug, upon the face of which the contacts are
continued, so that said plug may be fitted within the ordinary fixed lamp socket or
holder, suitable pins being fixed upon the sides to engage with the slots of the bayonet
joint or the like. Thus, the supplementary lamp holder which forms the essential
feature of our said invention may be adapted to any existing holder or socket of
standard size. The contact plates, carrying the spring or plunger terminals for
connection with the lamp, and also the contacts corresponding to the spring or
plunger terminals within the fixed holder or socket; are furnished with screws, clips
or like connections to which the branch leads are attached. In this way, the contact
plug ordinarily used for such branch leads, arranged to fit an ordinary lamp tolder or
socket is so constructed as to fulfil the dual functions of a holder or socket and
contact plug. The arrangement of contacts, and fittings may be varied to suit various
conditions of adaptation, without departing from the essential features of our said
invention.

page_text: Improvements in and relating to Incandescence Electric Lamp
Sockets and Holders.
We, HENRY BEVIS, Electrical Engineer, and JAMES YOUNG FLETCHER, Electrician,
both of Nos. 69-71, Queen Victoria Street, in the City and County of London, 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 --
Our invention relates to certain improvements in, and connected with incandescence
electric lamp sockets and holders. Hitherto in electric light installations it has
been the custom to remove the lamp when it is desired to divert the electric current
for motive power or other purposes, and the lamp and holder being thus removed, a
plug carrying the branch leads has generally been used to replace said lamp and
holder, making contact with the two contacts of the socket. In such cases the lamp
could not be used whilst the branch leads were in use. The object of our said
invention is to provide means for maintaining the service of the branch leads, and
utilising the electric lamp at the same time.
In order that our invention may be clearly understood we have appended the
accompanying sheet of drawings, in which Figure 1 is an elevation of the device.
In carrying our invention into effect we construct a supplementary lamp holder A,
which is fitted with spring plunger, or other contacts suitable to plug and socket
fittings, and a socket B adapted to the lamp L and its nipple or plug a; the upper
part forming a plug C, upon the face of which the contacts are continued, so that
it may fit into the ordinary lamp socket or holder, pins p p¹ engaging with the slots
of the bayonet joint thereof. Thus the supplementary lamp holder A may be
adapted to any existing holder or socket of standard size. The contact plates in A,
carrying the plunger or other contacts are furnished with screws, plates, or the like
within the recessed portion of A marked 7, and branch leads led to a contact plate d,
having concentric or spring contacts engaging with those of a plug e carrying the
branch leads ff. This plug may be removed or replaced at any time without
interfering with the lamp L provided that the excess of current does not exceed the
carrying capacity of the leads.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
First. The incandescence lamp socket and holder substantially as herein described
and shown by the appended drawings.
Second. In an incandescence lamp holder, the combination of a supplementary
holder A with a brauch plug or double contact e carrying two branch leads ff in
parallel or shunt substantially as and for the purposes herein described.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E., Agent for the Applicant.