Improvements in Pendant Fittings for Electric Lamps and the like.
Year: 1894

page_text: Date of Application, 28th May, 1894
Complete Specification Left, 28th Feb., 1895-Accepted, 4th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Pendant Fittings for Electric Lamps and
the like.
I JOHN MORRIS, Junior, of Strangeways Hotel, Evershot Station, Cattistock,
in the County of Dorset, Art Metal Worker, do hereby declare the nature of this
invention to be as follows:-
This invention for improvements in pendant fittings for electric lamps and the
like has for its object to provide a simple and efficient device whereby an article can be
suspended and readily regulated to any desired distance from its point of support,
and consists essentially in suspending the article by a flexible connection and in
providing between the article and the support, a device on which any desired
portion of the connection can be wound at pleasure.
In a device constructed according to this invention suitable more especially for
suspending electric lamps, a deeply grooved pulley, to the inner diameter of which
is secured a portion of the flexible connection containing the conductors leading to
the lamp, is mounted within the device and a spiral or other suitable spring acts
on the pulley in such manner that it tends to wind up the flexible connection.
An automatic friction brake for the flexible connection is also provided. The
flexible connection passes into the device, round the axle, through the side of and
round the pulley, then through the catch or friction grip and out of the device to
the article to be suspended. When the lamp is lowered the part of the
connection wound round the axle unwinds and gathers within the device. When
a friction brake is used the friction is regulated so that it and the weight of the
lamp balance the power of the spiral spring so that the cord is wound up on raising
the lamp.
Instead of the flexible connection passing round the axle it may be passed in the
reverse direction round a second pulley by the side of the first in which case the
device rises and falls with the lamp.
A suitable form of friction brake consists in passing the connection over a small
guide pulley or pulleys so that it assumes a more or less sharp bend at this point.
The lamp can be pulled down by hand and on raising the lamp the spring winds
up the slack connection. If the flexible connection does not contain the
conductors it need not be continuous, the lower end of the upper part being secured
to the top of the device and the upper end of the lower part to the inner diameter
of the pulley.
1004

page_text: Improvements in Pendant Fittings for Electric Lamps and
the like.
I JOHN MORRIS, Junior, of Strangeways Hotel, Evershot Station, Cattistock,
in the County of Dorset, Art Metal Worker, 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 :-
This invention for improvements in pendant fittings for electric lamps and the
like has for its object to provide a simple and efficient device whereby an article
can be suspended and readily regulated to any desired distance from its point of
support, and consists essentially in suspending the article by a flexible connection
and in providing between the article and the support, a device on which any
desired portion of the connection can be wound at pleasure.
In a device constructed according to this invention suitable more especially fo:
suspending electric lamps the flexible connection supporting the lamp is wound as a
double cord in the two grooves of a pulley mounted in a suitable frame and a spiral
spring attached to the frame acts on the pulley in such manner that it tends to
wind up the connection on the pulley. In winding the flexible connection on the
pulley it is passed through a hole in the central flange separating the two grooves
and the two parts are then wound respectively in the two grooves in the same
direction so that they both wind or unwind together. The ends of the cords
after leaving the pulley are passed through friction devices, the friction being so
regulated that it and the weight of the lamp balance the power of the spiral
spring and consequently the cord is wound up on raising the lamp. The device
rises and falls at half the rate of the lamp if the two grooves are of the same
size.
A suitable form of friction brake consists in passing the connection over a small
guide pulley or pulleys so that it assumes a more or less sharp bend at this point.
The lamp can be pulled down by hand and on raising the lamp the spring winds
up the slack connection.
In the accompanying sheet of illustrative drawings: Figs. 1 and 2 are sile
elevations at right angles to one another of a pendant fitting constructed according
to this invention.
The double pulley a is mounted loosely on a spindle fixed in the sides c of the
main frame. The pulley a is provided with a boss d to which is attached one end
of a spiral spring e whose other end is attached to the side c The other boss fis
fitted with a spring brake g or other device to steady the pendant. As shown it
consists of a disc fitting on the boss and pressed to one side by the spring h.
The flexible connection o containing the conducting wires is passed through a hole
at the root of the central flange i of the pulley a and the two parts of the
connection are then wound in the same direction in the two grooves of the
pulley a and the ends led out through guide tube at the opposite ends of
the main frame. A guide pulley m at each end causes the flexible connection o to
make a more or less sharp bend at this point and so forms a brake to keep the
lamp in any position to which it is pulled.
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 :
1. A pendant fitting for lamps and other suspended articles adapted to auto-
11

page_text: 2. A pendant fitting for lamps and other suspended articles consisting of a
frame, a spring pulley mounted in the frame and a flexible connection attached
to the pulley in such manner that any slack connection is wound on the pulley
substantially as described.
3. A pendant fitting for lamps and other suspended articles consisting of a
frame, a double pulley mounted loosely in the frame, a flexible connection wound
from some point in its length as a double cord in the two grooves and a spring
acting on the pulley to cause it to tend to wind up the flexible connection
substantially as described.
4. A pendant fitting for lamps and other suspended articles consisting of a
frame, guide tubes at either end of the frame, a spring pulley mounted loosely
in the frame, a flexible connection passing through the guide tubes and attached
to the pulley in such manner that any slack connection is wound on the pulley
and guide pulleys to make the connection take a more or less sharp bend
substantially as described for the purpose specified.
Dated this 28th day of February 1895.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.