Improvements in and connected with Moveable Electric Lights.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Moveable Electric Lights.
HENRY OLIVER FARRELL, 16, Kensington Road, Chorlton cum Hardy, Man-
chester, Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention relates to improvements by means of which an electric light
supplied with current from the town mains or other ordinary source of supply,
can readily be moved from one position to another, such as up & down the
length of a passage, so that the light may be in any part of the passage where
it is for the time being required.
In carrying out my invention I extend a wire or its equivalent (hereinafter
referred to as the wire) along the length of the passage, room, or other place
in the direction in which it is desired that the light is to be moveable.
Adjacent to each end of the wire I fix a grooved pulley. I also fix an ordinary
ceiling rose or its equivalent adjacent to one of the above mentioned pulleys.
I thread on the wire, a ring or any suitable object, so that it is free to slide
along the wire. I also use a block containing two grooved pulleys.
I arrange the insulated twin or twisted flexible current carrying wire (herein-
after referred to as the conductor) as follows-Considered as starting from the
before mentioned ceiling rose, the conductor passes round one of the pulleys
in the before mentioned block, then round the fixed pulley adjacent to the
ceiling rose; it then leads and is attached to the before mentioned sliding ring,
and from thence to the suspended electric lamp.
At a point near the opposite end of the wire, to that at which the ceiling rose
is fixed, I attach a cord of any suitable material. This cord passes round the
other pulley in the before mentioned block, then round the remaining fixed
pulley, & thence to the before mentioned sliding ring; to which it is attached.
The action is as follows.-When the lamp & with it the sliding ring is drawn
along the wire in one direction, it draws the conductor with it, and the said con-
ductor, as it runs on the fixed pulley, draws the block in the other direction,
by shortening the loop of the conductor that passes round one of the pulleys in
the said block. The loop of cord round the other pulley in the block at the
same time lengthening. When the lamp is moved in the other direction, the
action is similar but reversed; that is to say the loop of cord that passes round
the pulley in block, is shortened & the loop of conductor is lengthened.
1000
HENRY OLIVER FARRELL.
COMPLETE SPECIFICATION.
HENRY OLIVER FARRELL.
COMPLETE SPECIFICATION.
Improvements in and connected with Moveable Electric Lights.
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page_text: 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 improvements, by means of which an electric light,
supplied with current from the town mains or any ordinary source of supply,
can readily be moved from one position to another, such as up and down the
length of a passage, so that the light may be in any part of the passage where
it is for the time being required. It is obvious that a moveable light obtaining
its supply of current from a fixed point, through the medium of a flexible
conductor, needs a considerable length of such conductor to give a good range
of movement and that when the light is in a position near the fixed point to
which the conductor is attached, there will be an amount of slack conductor,
which, unless taken up or in some way disposed of, would be inconvenient. By
my invention, this slack is taken up and kept out of the way, by means of
a draw cord one end of which is attached to the conductor at a suitable point,
both the conductor and the draw cord running on pulleys, so arranged that,
when the light is moved in one direction, the pull on the draw cord takes up
the slack of the conductor; and when moved in the other direction, the pull
on the conductor takes up the slack of the draw cord.
The following is a description, with references to the annexed drawing, of
a convenient method of carrying out my invention.
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The ceiling rose xt, is the fixed point to which the flexible current carry-
ing conductor E is attached.
and are two brackets fixed to the ceiling, wall, or other suitable support,
at a convenient distance apart; the distance between these brackets being
approximately the range of movement of the light.
Cand Care fixed grooved pulleys attached to the said brackets.
d is a block containing two grooved pulleys and d
E is the flexible, current carrying conductor f the draw cord. G is a wire
stretched between the brackets and b¹.
H is a ring which slides on the wire G.
Jis a pendant electric lamp.
The flexible conductor E is attached to the ceiling rose a, passes round the
pulley d, then round the pulley C then to the ring H to which it is attached,
and thence continued to the lamp J.
The draw cord f is attached to the bracket b¹ passes round the pulley, then
round pulley C¹ and thence to the ring H, at which point it is attached to the
conductor E.
When the lamp J is moved along towards the bracket b, and causes the ring H
to slide along the wire G, it draws the draw cord f, which running over the
pulleys C and, causes the loop of the draw cord round the pulley to shorten,
and the block d, to move towards b¹.
This movement of the block d lengthens the loop of the conductor, passing
round the pulley , and thus takes up the slack caused in the conductor, as
the light is drawn towards the bracket 6.
When the light is moved in the other direction towards the bracket b', the
loop of the conductor passing round the pulley d¹ is shortened, the block d moves
towards the bracket b, and lengthens the loop of draw cord passing round
the pulley d².
By this means the conductor E and the draw cord f are both kept taut, and
loose slack is avoided, whatever the position of the lamp.
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:-
1. In moveable electric lights, the combination of a draw cord (f), a flexible
conductor (E), two pulleys (C and C) and a block (d) containing two pul-

page_text: leys (and), arranged substantially as, and for the purpose shown and
described.
2. In moveable electric lights the combination of a draw cord and a flexible
conductor, connected together, both running on pulleys and arranged in such
a manner that when the light is moved in one direction, the pull on the draw
cord takes up the slack of the conductor, and moved in the opposite direction,
the pull on the conductor takes up the slack of the draw cord; substantially
as described, and for the purpose hereinbefore mentioned.
Dated this Fourteenth day of April 1900.
HENRY OLIVER FARRELL.