Improvements in Rising and Falling Pendants for Gas, Oil, or Electric Lamps.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Rising and Falling Pendants for Gas, Oil, or
Electric Lamps.
I, EDWARD JOHN SHAW, of Astral Works, Hatherton Street, Walsall, Stafford-
shire, Lamp and Glass Manufacturer, do hereby declare the nature of this invention
to be as follows: —
My invention has for object to provide an adjustable pendant for gas, oil or
electric lamps by means of which the position or height of the light can readily
be varied as desired.
These
My invention consists in suspending the lamp from a pair of curved arms or
levers the lower ends of which are pivotted to the upper portions of the lamp
frame or harp and the upper furnished with suitable counterweights.
levers are pivotted at a point intermediate between the counterweight and their
lower ends to a second pair of pivotted levers or arms attached to or dependent from
the ceiling plate or other attachment by means of which the lamp is hung, the
arrangement being such as to permit the curved arms or levers extending in a
horizontal direction when the lamp is raised or pushed upwards and in a
vertical direction when the lamp is pulled down. The counterweights which
serve to balance the lamp may be fixed to the upper ends of the lower arms or
they may be capable of being moved in longitudinally either direction for the
purpose of adjustment.
In applying my invention to a gas lamp I may form the arms of tubes and
arrange for the gas supply to pass through the same, the pivotted joints in this case
being provided with suitable passages to permit the flow of the gas in any position.
Similarly in the case of an electric lamp the leads may be passed through the
arms if desired.
Improvements in Rising and Falling Pendants for Gas, Oil, or
Electric Lamps.
I, EDWARD JOHN SHAW, of Astral Works, Hatherton Street, Walsall, Stafford-
shire, Lamp and Glass 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: -
My invention has for object to provide an adjustable pendant for gas, oil or

page_text: electric lamps by means of which the position or height of the light can readily
be varied as desired.
These
My invention consists in suspending the lamp from a pair of curved arms or
levers the lower ends of which are pivotted to the upper portion of the lamp
frame or harp and the upper furnished with suitable counterweights.
levers are pivotted at a point intermediate between the counterweight and their
lower ends to a second pair of pivotted levers or arms attached to or dependent from
the ceiling plate or other attachment by means of which the lamp is hung, the
arrangement being such as to permit the curved arms or levers extending in a
horizontal direction when the lamp is raised or pushed upwards and in a
vertical direction when the lamp is pulled down. The counterweights which
serve to balance the lamp may be fixed to the upper ends of the lower arms or
they may be capable of being moved in longitudinally either direction for the
purpose of adjustment.
In applying my invention to a gas lamp I may form the arms of tubes and
arrange for the gas supply to pass through the same, the pivotted joints in this case
being provided with suitable passages to permit the flow of the gas in any position.
Similarly in the case of an electric lamp the leads may be passed through the
arms if desired.
Referring to the accompanying sheet of drawings:
Figure 1 shews the pendant in the raised position and
Figure 2 shews the pendant in the lowered position.
Figure 3 shews details of the pivot used in the case of a gas lamp.
The lamp or burner a is suspended from a pair of curved arms or levers b b¹,
the lower ends c c¹ of which are pivotted or hinged to the upper portion a' of the
lamp frame and the upper portions of these arms bb are provided with suitable
counterweights d d'.
Between these counterweights and the lower ends c c¹ of the arms, the latter
are pivotted to the second upper pair of arms or levers e e¹ which are secured by
means of pivots to the ceiling plate or stem f from which the lamp or burner
hangs.
It will be seen that on raising the lamp the arms or levers will extend or open
outwardly in a horizontal direction and when the lamp is pulled down these arms
will close in and extend vertically.
The counterweights d d may be fixed or movable on or along the upper ends
of the arms b b and when movable máy be locked in the desired position by
milled screws or other suitable means.
When my improved pendant is used for a gas lamp, the gas may be led to the
burner through one or more of the hollow arms or tubes and in this case the
pivotted joints will be provided with suitable passages to permit the flow of gas
in any position.
One of these joints is shewn on Figure 3, the one selected being the pivotted
joint connecting the tube a¹ and the weighted arms or levers 6 bl.
Gas passes
from the service pipe along one of the arms 6 and 61 and out through the corre-
sponding channel h or h¹ into the T-way at the top of the pipe a¹ by means of the
hole or holes m. It is necessary to provide a channel in only one of the arms b b¹
but by channeling both arms as at h and h¹ the T-headed tube a¹ may be inserted
between the arms in either position. The other pivotted joints are similarly
constructed.
In the case of an electric lamp, the leads or cables may be passed through and
along the various arms or tubes being connected at their ends to suitable insulated
plates or contacts.
The interior of the arms or levers may be coated with gutta percha or other
insulating material and the cables carried down the arms; the positive is prefer-
ably taken through one side of the various arms and the negative through the
other arms to the lamp. At the various joints contact plates are placed around

page_text: the pivots but insulated from these latter so that the current may pass to the lamp
in any position of the pendant.
The contact plates which are attached to the ends of the various sections of the
leads resemble washers in contact with but insulated from the fittings.
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 for gas, oil or electric lamps, consisting of two pairs of arms
pivotted together and also pivotted to the lamp and to the ceiling support, the
pairs of arms being extensible outwardly and contractible upwardly, or con-
tractible inwardly and extensible downwardly, and Being retained in the
desired position by the action of counterweights upon continuations of the lower
pair of arms, substantially as described.
2. A rising and falling pendant for gas, oil or electric lamps, comprising two
pairs of arms or levers pivotted together, the upper pair being pivotted to the
suspension tube or ceiling plate or a projection therefrom and the lower pair
being extended beyond the pivots connecting the pairs, and being provided with
fixed or movable counterweights and being pivotted to the lamp or portion of the
framework of the same, substantially as and for the purposes described with
reference to the accompanying drawing.
3. In rising and falling pendants for gas-lamps, a pivot comprising a T-headed
tube hollowed out and provided with admission inlets, the latter engaging a
channel or channels in the corresponding arm or arms secured upon said pivot so
as to allow gas to pass in any position of the adjustable pendant, substantially as
described and illustrated on Figure 3 of the accompanying drawing.
Dated this 20th day or August 1990.
For the Applicant,
GEDGE & FEENY,
60, Queen Victoria Street, London, E.C., Chartered Patent Agents.