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

page_text: Date of Application, 25th Jan., 1890-Accepted, 1st Mar., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by WALTER THOMPSON, of Dresden, Germany.]
Improvements in Sockets or Holders for Incandescent Electric
Lamps.
I, CHRISTEN REES BONNE of 41 Eastcheap, London E.C. Registered Patent Agent
do hereby declare the nature of my invention for IMPROVEMENTS IN LAMP SOCKETS,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of this invention is to reduce the cost of construction, to reduce
the number of parts in the device, to secure more perfect contact of terminals, to
prevent or reduce the liability of producing a spark at said terminals, to simplify
and render more convenient and easy the operation of switching or making or
breaking a circuit, to render the device more durable and generally to secure other
advantages and results, which will be hereinafter more fully set forth and described
and finally embodied in the clauses of the claim.
Referring to the accompanying drawings, in which like letters of reference indicate
corresponding parts in each of the several figures:
Fig. 1 is an elevation of the improved lamp socket, partly broken away,
Fig. 2 is an underneath view of the socket, showing the contact making parts.
and
Fig. 3 is a top view of a lamp, used in connection with the socket, shown in
Fig. 1.
a is the body of my improved lamp socket, made of rubber or other suitable
insulating material, in the top of which the insulating bushing b is screwed in,
through which the wires o, p, pass to the contact points j, i, Fig. 2. The sliding
bar chas its bearings in the lamp socket; on this bar is secured an insulating
block d of the form and shape as shown in Fig. 1 & 2.
One half of the inclines of this block d is covered with metallic plates e, e, which
are connected by metallic pins f,f. Against these oppositely beveled metallic covered
sides of said block d rest two spring arms g, j, when the circuit is completed, when
broken, said arms rest on the insulating inclines of the block d (latter position shown
in drawings).
On the bottom of the body a are secured two contact springs h, i. Contact spring h
and spring arm g are preferably made of one piece.
Wire o is connected with spring arm j, and wire p with contact spring i.
A metallic shell is secured to the body a by screws r, s, and, by the locking
device of said shell, the lamp n is held in contact with the springs h. i.
On 1, the top of the lamp, are the terminals m, m, which press against h, i.
When the circuit is completed, the current passes through wire o spring arm j,
metallic plates e e (connected by pin f) spring arm g and contact h, through lamp
terminals mm to contact spring i and out through wire p.
I dont intend to limit myself to the construction shown, as various changes can be
made, without changing the scope of my invention.
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. The improved lamp socket, consisting of an insulating body a, bushing b,
sliding bar c, insulating block d, having opposite inclines, two of which are covered
with metallic plates e, e, connected by pins, f, f; spring arms g, j, and contac
springs i, h, all said parts substantially as and for the purposes set forth.

page_text: 2. The improved lamp socket, combining therein an insulating body a, bushing b
sliding bar c, insulating block d, having two sets of opposite inclines, one set of
which is covered with metallic plates e, e, connected by pins f, f; spring arms 9,
and contact springs i, h, a metallic shell k, holding by its locking device the
lamp in position, all said parts substantially as and for the purposes set forth.
3. The improved lamp socket, combining therein an insulating body, in which the
key or switch operates, and a metallic shell supporting the lamp, all said parts
substantially as and for the purposes set forth.
London. 25th January 1890.
CHRISTEN REES BONNE,
41, Eastcheap, E.C., Registered Patent Agent.