Improvements in Electric Light Fittings.
Year: 1896

page_text: Date of Application, 30th Sept., 1896-Accepted, 7th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in Electric Light Fittings.
I, EDWARD WYNNE DONOVAN, of Broughton Bridge Iron Works, St. Simon
Street Salford, in the County of Lancashire, Mechanical and Electrical Engineer
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 adjustable fittings for incandescence electric light lamps,
& its object is; firstly, to provide a cheap & efficient portable standard secondly,
to utilise any existing counter-balanced suspension fitting as an adjustable standard
light; thirdly, to provide a means of taking up the slack of the flexible wires
attached to a portable fitting.
The first part of: my invention consists of an improved method of attaching any
ordinary lamp holder which is provided with a shade carrier to an adjustable, or
fixed arm on a portable, or stationary standard, or bracket. To accomplish this
I attach to the lamp holder a suitably shaped piece of metal, or other material,
which I shall call the "carrier." Preferably I form this "carrier" from a piece
of sheet metal formed to the necessary shape, & bent at an angle, as is fully
illustrated in the accompanying drawings Figs. 1. 2 & 3, of which Fig. 1, showз
end elevation of the "carrier "* a," in position on a lamp holder "6" placed over
the shade "c," but of course it can be equally efficiently attached when there is no
shade in use. Fig. 2, shows the side elevation of the "carrier" only, whilst Fig. 3,
illustrates the plan of same. It is obvious that this "carrier" may be formed in a
number of various manners, to fulfil the same purpose, for instance I might bend a
piece of wire in many ways so as to be suitable for a "carrier," or in place of the slot
shown in Fig. 2, I might only make a hole, & in place of the hole as shown by the
firm lines in Fig. 3, I might make a slot as shown by the dotted lines. In short,
this part of my invention consists of a "carrier" for attachment to the lamp holder
having a hole or slot for the reception of a bolt, or screw in the arm of a standard
or bracket which, when in place shall have its axis somewhat near to a right angle
with the axis of the lamp holder.
The second part of my invention consists of any ordinary standard, or bracket,
having an adjustable, or fixed arm with a device at the end arranged to engage
with the before described "carrier" & to hold the same firmly in any desired
position. The standard I prefer to use is illustrated by Figs. 4 & 5; Fig. 4
showing the adjustable arm "e" in side elevation, & Fig. 5, in end elevation, the
device for holding the "carrier" will be clearly understood from these drawings &
consists of a large headed bolt "f" passing through the end of arm "e" & fitted
with a wing or thumb nut "g" the carrier "a" is passed between the head of the
bolt "," & the end of the arm "e," in such a manner that the bolt "f" is allowed
free play within the slot in the "carrier" so that by this means it is obvious that
the position of the lamp may be adjusted to almost any angle within one vertical
plane, & held in that position by tightening the wing nut "g."
And as the arm "e" is capable of both vertical & radial adjustment about the
standard "h" which in itself is portable, I am enabled to procure an almost infinite
variety of positions for the lamp.
The third part of my invention consists of the combination of an ordinary
counterbalanced fitting with "carrier" & adjustable arm standard, as herein before
described, & illustrated in Fig. 5.

page_text: Having now particularly described & ascertained the nature of my said inven-
tion, & in what manner the same is to be performed, I declare that what I
claim is :-
1. The use of a "carrier," as herein before described & illustrated in the
accompanying drawings Figs. 1, 2 & 3.
2. The use of a "carrier" as herein before described in connection with the
lamp holder of any suspension, portable, or adjustable electric light fitting.
3. In a standard, or bracket, the use of an adjustable, or fixed arm, provided
with an end suitably arranged to hold a "carrier" in varying positions, as herein
before described, & illustrated in the accompanying drawings Figs. 4 & 5.
4. The combination of a lamp holder, "carrier" & adjustable, or portable,
electric light fitting, as herein before described & illustrated in the accompanying
drawings.
Dated this 29th day of September 1896.
EDWD. W. DONOVAN.