Improvements in Holders for Incandescent Electric Lamps.
Year: 1886

page_text: Improvements in Holders for Incandescent Electric Lamps.
I JAMES LEE of 37 Trafalgar Street, Brighton, in the county of Sussex, Outfitter.
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:
i
The object of my invention is the construction and arrangement of a holder for
connecting and supporting incandescent electric lamps so as to provide a large
contact surface with the terminal loops of the lamp and so prevent needless
resistance, and to enable the lamps to be easily and securely connected and
supported so that contact cannot possibly be broken by vibration.
To attain this end I construct my holder with a pair of arms which grip the
terminal loops of the lamp and so give the greatest possible contact and security.
from disconnection I construct my holder as illustrated in the accompanying
drawings throughout the figures of which similar parts are marked with like
letters of reference. Fig. 1 is an end elevation, Fig. 2 a side elevation, Fig. 3 a
plan, and Fig. 4, a sectional plan on line v. w. of Fig. 1 of my improved holder.,
Fig. 5 is an end elevation, Fig. 6 a side elevation, and Fig. 7 a plan half in section.
on line . y. of Fig. 5, of a modification of my improved holder, and Fig. 8 is an
enlarged view showing my improved method of connecting the terminal wires..
Referring to Figs. 1, 2, 3 and 4. The body of my improved holder consists of a
pair of light metal arms A A preferably made of some elastic material. These
arms A A are connected together at the top and arranged to form, or connect
with, any other suitable holder such as B. The lower ends of these arms carry
small blocks of wood, ebonite, or other suitable non-conducting material C. C. In
each of these blocks are fixed two small pins D and D¹ with flat heads d and d².
The pins D¹ are the connections for the leading wires, and the pins D form simply
contact plates; the pins are therefore arranged so that the heads d of the pins, D
each come opposite the heads d' of the pins D¹. The pins D¹ D¹ are extended
through the block to provide a ready means of connecting the leading wires Z. Z,
and are provided with locking nuts d³ d² and clamping nuts d³ d³ for gripping the
leading wires. The arms A. A. are preferably made of a bow shape and are
provided with a bolt a and screw nut a', so that their ends can be brought
together to grip the terminal loops ee of the lamp E. The arms A. A. are
preferably bent so that the ends carrying the blocks C. C. will spring open when

page_text: the screw nut a¹ is slackened, or they may be fitted with a screw bolt that will
open or close them by turning the bolt in either direction as will hereinafter be
described as applied to the modification of my improved holder shown by Figs. 5. 6
and 7. Referring to these figures it will be seen that instead of mounting the
insulating blocks C. C. on the ends of the arms A. A. I sometimes swell out the
end of each arm to form two bosses to carry the pins D and D¹ which I insulate
from the metal arms A A by means of bushes or collars G G etc., of wood, ebonite
or other non-conducting material. These figures also illustrate an alternative
method of causing the arms A. A. to grip the terminal loops e e of the lamp E
which consists of using a screw bolt a threaded through one arm A, and headed
outside the other one, so that as the bolt is turned in either direction it causes the
ends of the arms A A either to come together or recède from each other.
Figs. 6. 7 and show an improved method of connecting the leading wires to
the holder. The ends of the pins D¹ D¹ are bored longitudinally with a small hole
and are cross-cut in two or more directions. A running nut d³ is then screwed on
to each pin and after the end of the leading wire Z is inserted in the end of the pin
the running nut d³ is screwed outwards which binds the cross-cut pin D¹ on to the
leading wire Z.
It will be seen that a holder constructed as hereinbefore described and shown
gives the greatest possible contact with the terminal loops of the lamp, and
suspends it in such a manner that it cannot become disconnected by vibration.
With my holder lamps can be more readily attached and disconnected than from
any other, and even lamps with broken loops may be used, the holder is moreover
simple and inexpensive to manufacture.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is :-
First A holder for incandescent electric lamps, constructed, arranged, and
operating, substantially, as and for the purpose herein before described and shown.
Secondly-An incandescent electric lamp holder consisting essentially of the
arms AA insulating blocks C. C. and conducting pins D and D¹ all constructed
arranged and operating as and for the purpose herein before set forth.
Thirdly-The adjusting screw or bolt a in combination with the metallic
arms A. A. and insulating blocks C for adjusting the position of the conducting
pins D and D¹ so as to grip or release the terminal loops of the lamp as herein-
before set forth.
Fourthly The method of connecting the leading wires to the lamp holder
consisting essentially of a split hollow pin, and a running nut, constructed arranged
and operating as and for the purpose hereinbefore set forth.
10AL .:1 נית
1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Agent for the Applicant.