Improvement in Incandescent Lamp Holders or Suspenders.
Year: 1890

page_text: Date of Application, 6th Nov., 1590
Complete Specification Left, 5th Sept., 1891-Accented
404
A
ICATION.
[Communicated from abroad by CLEMENT CHARNOCK, of Karlowa, Moscow
Government, Russia, Mill Manager.]
Improvement in Incandescent Lamp Holders or Suspenders.
I JAMES EDWARD CHARNOCK of 25 Napier Street, Oldham in the County
of Lancaster, Mechanic do hereby declare the nature of this invention to be as
follows:-
My invention relates to holders or suspenders for electric incandescent lamps and
5 consists in an improved arrangement or construction of said holders or suspenders
by means of which cach holder or suspender forms at the same time a switch for
the single lamp it holds as well as a holder or suspender for the same. In
consequence each lamp can be extinguished and relit without being provided with
an independent switch for this purpose and the cost of such switches is saved
thereby.
In the lamps fixed in their holders by a bayonet joint two pegs fixed laterally to
the metal hoop surrounding the neck of the globe serve to connect the same to the
suspender. The socket into which the neck fits has two slots formed in it at right
angles to its edge and with a continuation parallel to the edge, into which said pegs
are pushed and by turning the globe brought to the ends of the parallel slots, where
small recesses in the edge of the slots hold them in their places and thus keep the
wires of the lamp in contact with the terminals in the suspender. My improvement
consists in continuing the parallel slots for some distance beyond the recess and
then turning the slots towards the edge of the suspender till within a short distance
of the same. By turning the globe so that the pegs on the hoop or neck of the
ame come to the end of the parallel slots, they will drop down in the slots turned
owards the edge and rest in the same.
rom the terminals in the suspender and the lamp is switched out of circuit. By
The wires of the lamp are thereby removed
fting and turning the globe back to its previous position, the contact is made again
nd the lamp relit.
Where the globes are placed upright instead of hanging downwards or where
ey are placed horizontally the slots beyond the position of the peg when the
cuit is closed are continued in a slanting direction towards the edge and then
rallel to the same, small recesses in the edges of the slot being formed to hold the
gs when the globe is turned into the corresponding position. When the globe is
ned the pegs slide on the inclined parts and draw the globe partly out of the
ket, so that the circuit is broken.
The parts of the socket between the slots and the edge may be bent inwards so
o form spring clips for the neck and hold the same in its drawn out position or
er spring devices may be applied for this purpose.
Dated the 5th day of November 1890.
W. T. EMMOTT,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvement in Incandescent Lamp Holders or Suspenders.
1 JAMES EDWARD CHARNOCK of 25 Napier Street, Oldham in the County of
Lancaster, Mechanic 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 :-
My invention relates to holders or suspenders for electric incandescent lamps and
consists in an improved arrangement or construction of said holders or suspenders
in consequence of which each holder or suspender forms at the same time a switch
for the single lamp it holds as well as a suspender for the same, so that each lamp
can be extinguished and relit independently of any other without being provided
with a separate switch for this purpose and the cost of such switches is saved
thereby.
On the sheet of drawings appended hereunto
Fig. 1 represents the holder and lamp in its lighted position.
Fig. 2 the same when extinguished.
Fig. 3 a section of the holder.
Figs. 4 and 5 modifications of the arrangement.
b
In the lamps fixed in their holders by a bayonet joint two pegs or trunnions a
fixed laterally to the metal hoop or cap & surrounding the neck of the globe g serve
to connect the same to the holder. The socket c of the holder into which the hoop or
cap fits has two slots d formed in it at right angles to its edge and with continuations
parallel to the same into which said pegs are pushed and by turning the globe are
brought to the end of the parallel slots where small recesses in the edge of the
slots hold them in their places and thus keep the contact plates of the wires e or
their equivalents in the lamp pressed against the springs (Fig. 2) or equivalent
terminals in the holder. My improvement consists in extending the slots in such
a manner that by moving the pegs of the cap b along the slots the contact plates
of the wires are removed from the terminals in the holder. This may be done as
shewn by Figs. 1 and 3, by continuing the slots parallel to the edge beyond the
recesses d' and then turning them towards the edge to within a short distance from
the same. By turning the globe so that the pegs a on the cap 6 come to the ends d²
of the parallel slots, they will drop down the vertical continuation or be pushed
down by the springs and rest on the ends d³. The contacts of the lamp are
thereby removed from the terminals in the holder c, either by the rotary or vertical
displacement or by both as may be preferred, and the lamp is switched out of the
circuit and extinguished. By pushing the cap into the holder and turning it back
to its previous position, the circuit is closed again and the lamp relit.
Instead of the slots being turned towards the edge of the holder at a right angle
to the same, they may be made inclined as shewn by Fig. 4, or instead of extending
them beyond the recesses d' on the same side of the slots d they may be extended
on the oppostie side of said slots and turned towards the edge vertically as shewn or
slantingly, the pegs being pressed against the tops of the parallel slots while the
lamp is turned. By turning the lamp so that the pegs a come to the ends i or n of
the slots, the lamp is extinguished, and can be relit by turning it back to its
original position.
The pegs a may be provided with knobs for getting hold of them when turning
the lamp instead of seizing the globe.
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
Firstly. In incandescent lamp holders or suspenders with bayonet joints arranging
or extending the slots in said holders or suspenders in such a manner or direction

page_text: that by moving the pegs or trunnions of the lamp cap along said slots the contact
plates of the lamp or their equivalents can be removed from the terminal springs or
their equivalents in the holder or suspender and brought again into contact with
them without removing the lamp from the holder, substantially as hereinbefore
described and for the purpose set forth.
Secondly. The arrangement or formation of incandescent lamp holders or
suspenders having bayonet joints with slots for the pegs or trunnions of the lamp
cap extended or shaped substantially as hereinbefore described and illustrated by
the drawings.
Dated this 4th day of September 1891.
R. J. URQUHART,
57, Barton Arcade, Manchester, Patent Agent and Consulting Engineer.