BRACKET FOR INCANDESCENT ELECTRIC LAMP
Year: 1884

page_text: '
I, WILLIAM EDWARD HERRMANN SCHARINA of Charlton in the County of Kent,
Electrical Engineer do hereby declare the nature of the said Invention for
"BRACKET FOR INCANDESCENT ELECTRIC LAMP" to be as follows:-.
This Invention relates to a construction of bracket projecting from a wall or
partition to carry an incandescent lamp at its end, with means of making or
breaking electrical contact by turning a button at the end of the bracket. From
a wooden boss that can be screwed or otherwise fixed to the wall or partition
projects a tube having within it the insulated conducting wire, which may be kept
in a central position in the tube either by passing it along a hole in wood or
insulating material filling the tube, or by passing it through holes in two discs of
such material, one fixed at each end of the tube. One end of the insulated wire
that next the wall is fastened to a metal disc fixed within the wooden boss, or it
may be fastened to a button which is pressed by a helical spring against the metal
disc. The other end of the wire is fastened to an elastic metal fork having its
prongs projecting horizontally over the centre of the lamp. Between these prongs
there is a vertical metal spindle made of rectangular section in that part of it
which passes through the fork. This spindle is at its upper end fixed to a button
of insulating material, and its lower end is made as a spring socket to receive the
conductor of the lamp which is suspended below. On turning the button to ono
position the rectangular part of the spindle presents its narrow dimension to the
fork not touching either prong, so that there is no electrical contact. On turning
the button one quarter round the broad dimension strains the prongs of the forks
apart making intimate contact with them. This part of the mechanism is arranged
within a globular end of the bracket tube, which globular end is surmounted by
the button. From the lower side of the globular end extends downwards a socket
tube for receiving the stem of the lamp bulb and for carrying the gallery that
suspends the external globe of opaline or such like material which encloses the
bulb. In cases where the lamp is subject to vibration, as on shipboard, the bulb
is suspended from the bracket by helical springs, and a spring may be inserted in
the button so as to keep its collar pressed against a shoulder with sufficient
friction to prevent it from shaking out of position. The lamp is connected into
circuit by its own wire being coupled through the spindle and fork to the disc in
the wooden boss to which one of the circuit conductors is connected, and by its
other wire being coupled to the metal of the bracket to which another of the
circuit conductors is connected.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,.
London, W.C.

page_text: I, WILLIAM EDWARD HERRMANN SCHARINA of Charlton in the County of Kent
Electrical Engineer do hereby declare the nature of the said Invention for
"BRACKET FOR INCANDESCENT ELECTRIC LAMP" and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement, that is to say :—
This Invention relates to a construction of bracket projecting from a wall or
partition to carry an incandescent lamp at its end, with means of making or
breaking electrical contact by turning a button at the end of the bracket. Fig. 1
of the accompanying Drawings is a longitudinal section of the bracket shewing
the lamp globe in elevation, Fig. 2 is a longitudinal section showing a modification
of the bracket, and Fig. 3 is a sectional plan of the outer end of the bracket shewn
in Fig. 2. From a wooden boss A that can be screwed or otherwise fixed to the
wall or partition projects a tube B having within it the insulated conducting wire C,
which is kept in a central position in the tube B either by passing it along a hole
in wood or other insulting material D filling the tube as in Fig. 1 or by passing
it through holes in two discs d d of such material, one fixed at each end of the
tube, as shewn in Fig. 2. One end of the wire C, that next the wall is fastened to
a metal disc E within the boss A, as in Fig. 1, or it may be connected as shewn in
Fig. 2, to a button F which is pressed by a helical spring against the metal disc E.
The other end of the wire C is fixed to an elastic metal fork G having its prongs
projecting horizontally over the centre of the lamp. Between these prongs there
is a vertical metal spindle H made of rectangular section in that part of it which
passes through the fork G. To the upper end of the spindle H is attached a
button K of insulating material, and the lower end L of the spindle is made as a
split spring socket or plug to receive one of the conductors of the lamp which is
suspended below. On turning the button K to one position, the rectangular part
of the spindle H presents its narrow dimension to the fork G not touching either
prong, as shewn in Fig. 3, so that there is no electrical contact. On turning the
button K one quarter round H by its broad dimension strains the prongs of G
apart making intimate contact with them. This part of the mechanism is arranged
within the globular end M of the bracket tube, which is surmounted by the
button K. From the lower side of M extends downwards a socket tube N for
receiving the stem of the lamp bulb O and for carrying the gallery P that suspends
the external globe Q of opaline or such like material which encloses the bulb. In
cases where the lamp is subject to vibration, as in shipboard, the bulb O is
suspended from the bracket by helical springs R, and a spring S may be inserted
in the button K, as shewn in Fig. 2 so as to keep its collar k pressed against a
shoulder above it with sufficient friction to prevent the button from shaking out of
position. On turning the button so that the rectangular part of the spindle H
nakes contact with the prongs of G, the lamp is connected into circuit by one of
its wires being coupled through G and C to the disc E to which one of the circuit
conductors T is connected, and by the other wire of the lamp being coupled to the
metal of the bracket to which another of the circuit conductors. Y is connected.
Having thus described the nature of my Invention and in what manner the same
is to be performed, what I claim is :—
The construction of bracket for incandescent electric lamp, consisting of a
metallic tube having within it an insulated wire and spring fork, between the

page_text: prongs of which a contact spindle connected to one wire of the suspended lamp
can be turned by a button surmounting the globular end of the tube, substantially
as herein described.
Dated thin Teth 1
TI
1064
ABEL & IMRAY,
Agents for the Applicant, .
28, Southampton Buildings,
London, W.C.