Improvements in Suspension Devices for Electric and other Lamps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Suspension Devices for Electric and other Lamps.
I, PAULIN GABRIEL PASQUET, of 95, Boulevard Beaumarchais, Paris, in the
Republic of France, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
The object of the present invention is a new swivel suspension for lamps,
which enables the light to be moved in such a manner as to increase the area
which may be illuminated and to enable the light to be directed towards any
desired point.
In order to make the explanations which follow as clear as possible, I will
describe by way of example, my arrangement applied to an incandescent electric
lamp.
The apparatus consists essentially of a stirrup or bracket with one or more
branches, the ends of which are provided with wings, enabling the suspension
apparatus to be fixed to the ceiling, to posts or to a wall. This stirrup or bracket
has at its lower end a ring, on which rests a globe fixed to an outer tube. At
the upper end of the said tube is a second globe, which serves, as hereinafter
described to counterbalance the weight of the tube and of the lamp fixed to its
extremity.
The lamp is fastened to the end of an inner tube which is adapted to slide
in the outer tube with slight friction. By this arrangement it will be understood
that the distance between the lamp and the globe may be increased or diminished
at will. The latter constitutes in fact the pivot of the apparatus; it reṣts upon
three points on the ring supported by the stirrup.
A modification of the device consists in adding to the abovementioned ring a
second ring, placed in the upper part of the swivel and fastened to the lower
ring by bolts or hooks.
This second ring, by virtue of its own weight, or by the action of suitable
springs or indiarubber pieces forms the means of setting & fixing the lamp in
any desired position and thus enables the above mentioned counterweight to be
dispensed with. The pressure of the screws or hooks on the springs can be
regulated as desired.
Flexible wires convey the current to the proximity of the swivel, but it is
necessary to branch off from this point so that the conductors may be made
extensible; this result I obtain by one of the following means:
1. By a double flexible wire attached to spiral spring surrounding the tube.
2. By inserting within the tube to which the lamp is fixed two insulated
copper channels, against which bear two insulated fixed rods communicating with
the terminals through which the current is conducted.
3. By flexible wires wound on a spring roller or passing over pulleys and
having suspension weights.
The lamp being thus suspended will take any desired direction and will retain

page_text: its position by reason of the friction of the globe in the ring, the weight of the
two globes and of the whole movable portion or the setting arrangement of the
ring.
It is evident that instead of using two globes I may substitute for them one
globe with only one ring, by making the lower part of it hollow and the upper
part solid, this forming the counter-weight.
I may if desired use a single non-extensible tube and thus dispense with the
use of flexible wires and sliding contact.
For use as a gas fitting, the gas arrangement will be the same, except that the
conducting wires will be dispensed with; the gas is conveyed to the swivel by a
flexible tube, the lamp-carrying tube is provided with a piston and is curved
to the form of the letter near the burner.
Dated this 16th day of February 1897.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.
Improvements in Suspension Devices for Electric and other Lamps.
I, PAULIN GABRIEL PASQUET, of Petit-Moulin, Etampes (Seine-et-Oise), in the
Republic of France (late of 95, Boulevard Beaumarchais, Paris, in the Republic
of France), Manufacturer, 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, and accompanying drawing, that
is to say-
My present invention relates to a novel apparatus for suspending electric or
other lamps, by which the light can be readily moved so as to increase or vary
the area which is lighted, and to allow it to be directed to any point where it
will be most useful.
The accompanying drawing is in illustration of my invention, but I do not
confine myself to the particular details of the improved method of arrangement,
which may be varied more or less to suit different circumstances.
The drawing illustrates the invention applied to an electric incandescent lamp.
Figure 1 is a side view.
Figure 2 is a section on the line 1-2 in Figure 1.
Figures 3 and 4 show some modifications or variations.
The apparatus consists essentially of a support or carrier E having one or more
arms or branches, of which the end or ends are provided with feet or flanges e
by which the apparatus can be fixed to a ceiling, wall or other foundation. This
carrier carries at its lower end a collar T upon which rests a sphere S forming
part of or firmly fixed to a tube G. At its upper end the tube G carries a second
sphere S¹ which serves, as explained below, to balance the weight of the tube G
and of the lamp which is placed at its end.
The lamp D is fixed to the end of a tube c, which can move with sufficient
friction in the tube G.
It will be understood that by this means the distance between the lamp D
and the spherical support S fixed above, can be lengthened or shortened as may
be desired.
This sphere S, which forms the pivot upon which the apparatus moves in any
direction, rests upon three projections f (Figure 2) in the collar T.
The lamp D being suspended in the way described, can evidently be moved

page_text: in any desired direction, and by means of the sphere S₁ it is balanced and is in
equilibrium in every position in which it is adjusted, and held by the friction
of the sphere against the projection in the collar.
The conducting wires of the lamp are attached to a helical spring, the coils of
which they follow, and the whole is wound round the tube G. This arrangement
allows them to adjust themselves to any changes made in the length of the
tube or bar G.
As modifications of the above arrangement, (1), the two spheres S and S¹ as
shown, may be replaced by a single sphere of which the upper part is solid and
the lower part hollow.
Or, (2), a second collar F1 (Figure 3) may be placed in the upper part of the
spherical joint and connected to the lower collar by hooks or screws. This
second collar holds the moveable sphere forming the universal joint sufficiently
tightly by means of its own weight, or by suitable springs, (helical, flat, or
spiral, or india-rubber or other suitable elastic material). In this form of
arrangement the balance weight S₁ may be omitted. The pressure of the screws
or hooks is adjustable as may be desired.
(3). Sliding contacts (A, A¹, Figure 4) may be used for the passage of the
electric current, sliidng against insulated conductors L, L', placed in the tubes;
or two parallel tubes may be used; or flexible wires coiled upon a spring cylinder
or roller, or over pulleys with stretching weights.
For use with gas lamps a flexible gas supply pipe should be used below the
spherical joint, gas-tight joints being made, and the socket for the electric lamp
being replaced by a curved pipe for the burner.
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:-
The novel method of suspension by a spherical universal joint, for lamps of all
kinds, in which a sphere forming the universal joint is carried upon a collar
having projections to receive it, and with or without a counter-balance weight
and with or without a second collar held down with adjustable friction, sub-
stantially as described and illustrated.
ted this 15th day of November 1890.
EDWARDS AND CO.,
Chartered Patent Agents, 65 and 66, Chancery Lane, London,
Agents for the Applicant.