Improvements in Chandeliers, Gaseliers, Gas Pendants, and Gas Brackets, which Improvements are also applicable to other Hanging Lamps.
Year: 1896

page_text: Date of Application, 16th Jan., 1896
Complete Specification Left, 18th Aug., 1896-Accepted, 17th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Chandeliers, Gaseliers, Gas Pendants, and Gas
Brackets, which Improvements are also applicable to other
Hanging Lamps.
°
I, THOMAS FORD, of Victoria Works, Emily Street, Highgate, Birmingham, in
the County of Warwick, Chandelier Manufacturer, do hereby declare the nature of
this invention to be as follows:-
My invention has reference to chandeliers, gaseliers gas pendants and gas brackets
and the like in which the jointed arms have motion in a vertical plane, the raising
and lowering of the jointed arms being accoinpanied by a simultaneous inward and
outward motion of the said arms.
I will describe my invention as applied to one arm of a gaselier, the said arm
being jointed to the central or down pipe.
I form the said jointed arm preferably of a scroll shape, that is, of a figure
somewhat resembling the letter S; the said scroll arm being jointed at its inner end
to the said down pipe and at its outer end to the vertical or pendant arm carrying
the burner or lamp. The joints at the ends of the scroll arm have the ordinary
passages by which gas passes from the down pipe to the lamp or burner.
The down pipe and the jointed scroll arm are connected by a telescopic regulating
and fixing arm the parts of which are constructed and arranged in the following
manner.
The said telescopic regulating and fixing arm consists of a tube jointed at its
upper end to the down pipe and of a smaller tube sliding in the lower end of the
other or fixed tube, the lower end of the sliding tube being jointed in the way
hereinafter described to the jointed scroll arm near its inner end.
The fixed tube of the telescopic regulating arm is made in two parts or halves
the joined ends forming a box like recess in which is a screw nut capable of a
rotary
motion in the said box like recess. A brake block made preferably of hard wood,
bears on one side of the screw nut the pressure of the brake block being regulated
by an external thumb screw. Situated in the axis of the telescopic regulating arın
and passing through the screw nut at the middle of the fixed tube of the said arm,
is a quick threaded screw the lower end of which is provided with a toothed locking
collar the teeth of the said collar engaging in corresponding notches in a fixed
screwed boss terminating the lower or sliding tube. By the engagement of the
collar of the said axial screw with the lower or sliding tube in the way described the
axial screw is prevented from turning on the withdrawal of the lower or sliding tube
from the fixed tube. On the screwed boss of the lower or sliding tube a cap,
carrying the knuckle of the joint on the scroll arm, screws the space within the said
cap permitting of the lower or sliding tube when pressed inwards advancing a short
distance on the axial screw by which motion the locking collar is disengaged from
the boss of the lower or sliding tube and the axial screw is free to rotate and advance
by a screwing motion in the screw nut of the fixed tube.
The action of the telescopic regulating arm is as follows:-On the lowering and
accompanying outward motion of the scroll arm and pendant lamp carrying arm the
lower or sliding tube of the telescopic regulating and fixing arm is withdrawn from
the fixed tube and the locking collar on the axial screw being engaged with the boss
of the lower or sliding tube the axial screw is pulled through the screw nut in the

page_text: box like recess of the fixed tube by which action the said screw nut is rotated. In
consequence of the resistance of the brake block to the rotation of the screw nut
the jointed scroll arm and its pendent lamp carrying arm are supported in any
position to which they may have been brought.
On the raising of the jointed scroll and pendent arms the sliding tube being
pressed inwards the notches in its boss rise from off the teeth of the locking collar
on the axial screw and thereby disengage the said screw from the sliding tube and
permit it to rotate in the said tube. The further inward motion of the sliding tube
causes the axial screw, which is now in contact with the cap on the boss of the
sliding tube to advance by a screwing motion through the screw nut in the box like
recess in the fixed tube, the said screw nut during the inward motion of the axial
screw remaining stationary. On the release of the jointed scroll and pendent arms
the boss of the sliding tube immediately engages itself with the locking collar of the
axial screw and the parts are retained in position.
The application of my invention to the jointed arms of chandeliers, electroliers,
gas pendants and brackets and to the arms of devices for suspending lamps generally
whether for gas oil or electricity differs in no essential respect from its application
to the jointed arms of a gaselier as hereinbefore described.
Dated the T
1800
W. T. WHITEMAN,
Agent for the Applicant.
Improvements in Chandeliers, Gaseliers, Gas Pendants, and Gas
Brackets, which Improvements are also applicable to other
Hanging Lamps.
I, THOMAS FORD, of Victoria Works Emily Street, Highgate, Birmingham in
the County of Warwick, Chandelier Manufacturer do hereby declare the nature of
my 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 reference to chandeliers, gaseliers, gas pendants and gas brackets,
and the like in which the jointed arms have motion in a vertical plane, the raising
and lowering of the jointed arms being accompanied by a simultaneous inward and
outward motion of the said arms.
I will describe my invention as applied to one arm of a gaselier, the said arm
being jointed to the central or down pipe.
I form the said jointed arm preferably of a scroll shape, that is, of a figure
somewhat resembling the letter S, the said scroll arm being jointed at its inner end
to the said down pipe and at its outer end to the vertical or pendent arm carrying
the burner or lamp. The joints at the ends of the scroll arm have the ordinary
passages by which gas passes from the down pipe to the lamp or burner,
The down pipe and the jointed scroll arm are connected by a telescopic regulating
and fixing arm, the parts of which are constructed and arranged in the following
manner.
The said telescopic regulating and fixing arm consists of a tube jointed at its
upper end to the down pipe and of a smaller tube sliding in the lower end of the
other or fixed tube, the lower end of the sliding tube being jointed in the way
hereinafter described to the jointed scroll arm near its inner end.
The fixed tube of the telescopic regulating arm is made in two parts or halves,
the joined ends forming a box like recess in which is a screw nut capable of a rotary
motion in the said box like recess. A metallic spring brake the pressure of which
is regulated by a screw bears on one side of the screw nut. Or a brake block of
hard wood may be substituted for the metallic spring brake. Situated in the axis

page_text: of the telescopic regulating arm and passing through the screw nut at the middle of
the fixed tube of the said arm is a quick threaded screw, the lower end of which is
provided with a toothed locking collar the teeth of the said collar engaging in
corresponding notches in a fixed screwed flange or cap terminating the lower or
sliding tube. By the engagement of the collar of the said axial screw with the
lower or sliding tube in the way described, the axial screw is prevented from turning
on the withdrawal of the lower or sliding tube from the fixed tube. On the screwed
flange or cap of the lower or sliding tube, a short tubular boss carrying the knuckle
of the joint on the scroll arm screws, the space between the cap and the bottom of
the boss permitting of the lower or sliding tube, when pressed inwards, advancing a
short distance on the axial screw, by which motion the locking collar is disengaged
from the flange or cap of the lower or sliding tube and the axial screw is free to rotate
and advance by a screwing motion in the screw nut of the fixed tube.
The action of the telescopic regulating arm is as follows:-On the lowering and
accompanying outward motion of the scroll arm and pendent lamp carrying arm, the
lower or sliding tube of the telescopic regulating and fixing arni is withdrawn from
the fixed tube and the locking collar on the axial screw being engaged with the cap
of the lower or sliding tube the axial screw is pulled through the screw nut in the
box like recess of the fixed tube by which action the said screw nut is rotated. In
consequence of the resistance of the brake block to the rotation of the screw nut
the jointed scroll arm and its pendent lamp carrying arm are supported in any
position to which they may have been brought.
On the raising of the jointed scroll and pendent arms the sliding tube being
pressed inwards the notches in its cap rise from off the teeth of the locking collar
on the axial screw and thereby disengage the said screw from the sliding tube and
permit it to rotate in the said tube. The further inward motion of the sliding tube
causes the axial screw, which is now in contact with the tubular boss of the sliding
tube, to advance by a screwing motion through the screw nut in the box like recess
in the fixed tube, the said screw nut during the inward motion of the axial screw
remaining stationary. On the release of the jointed scroll and pendent arms the
boss of the sliding tube immediately engages itself with the locking collar of the axial
screw and the parts are retained in position.
Figure 1 of the accompanying drawings represents in front elevation a two light
gaselier containing my improvements, one of the jointed arms and parts carried by it
being indicated in their lowered position in dotted lines;
Figure 2 represents in side elevation one of the pendent lamp carrying arms or
frames pivotted to the free or outer ends of the jointed arms of the gaselier:
Figures 3, 4 and 5 represent portions of the same drawn to a larger scale.
Figure 6 represents in side elevation a gas bracket containing my improvements.
The same letters of reference indicate the same parts in the several figures of the
drawings.
I will first describe the gaselier Figures 1, 2, 3, 4 and 5.
a is the centre or down pipe to the lower end of which the scroll arms b, bare
jointed the said scroll arms turning on the horizontal hollow joints 1, b. The
outer ends of the scroll arms b, bcarry the pendent or lamp carrying arms or
frames c, c (see the side elevation Figure 2) the said lamp carrying frames turning
on the horizontal hollow joints 62, at the outer or free ends of the arms b, b.
When the scroll arm and pendent lamp carrying arm are pulled down as indicated
in dotted lines in Figure 1 the outer joint & takes the curvilinear path indicated by
the curved line a, ..The jointed scroll arm b is supported in its raised or lowered,
or in any intermediate position, by the telescopic regulating and fixing arm D (see
the enlarged views Figures 3, 4 and 5).
Figures 3 and 4 represent one half of the lower end of the centre or down
pipe a and the inner end of one of the scroll arms 6 in elevation with the
telescopic regulating and fixing arm D in section, the parts being in their raised
position in Figure 3 and in their lowered position in Figure 4; Figure 5 is a
section on the line y, y Figure 3 showing the screw nut and adjustable frictional

page_text: brake in the box like recess of the fixed tube of the telescopic regulating and
fixing arm D. The telescopic arm D consists of two tubes marked respectively d, e,
the tube e sliding and working in the tube d. The upper end of the tube d and
the lower end of the tube e are jointed respectively to the down pipe a and jointed
scroll arm b by means of knuckle joints d, e. The tube d is formed of two parts
or halves the adjacent ends of which are secured to opposite sides or ends of a
box or chamber d containing a screw nut and a metallic frictional brake i for
the same, the pressure of which brake is regulated by the thumb screw h. The
screw nut is provided with leather or other washers. The telescopic arm
is provided with an axial quick threaded screw g which is engaged with and
prevented from rotating by the lower sliding tube e when the parts are at rest
and also when the sliding tube e is withdrawn from the fixed tube d, but is
disengaged from the lower sliding tube e and permitted to rotate on the pressing
inwards of the said sliding tube e in the manner bereinafter described. The quick
threaded screw g represented is made from a strip or rod of iron or steel wire,
square in cross section, the upper part of which is twisted so as to give to it a
screw like form for working in the screw nut f. The lower end of the screwed
rod has formed upon it a toothed collar 9 somewhat resembling a bevil pinion
and the lower end of the tube e has a screwed flange or cap e for taking
into the screwed hollow or tubular boss 3 of the knuckle joint e; the underside
of the screwed cap e is shaped to receive the pinion end 92 of the screwed rod g.
The space between the boss e³ and its cap is such as to permit of the sliding
tube e when pressed inwards advancing on the screwed rod g to such an extent
as to permit of the disengagement of the pinion end g² of the rod g from the
cap of the said sliding tube e. In the box d² is a metallic spring friction
brake bearing on the screw nut the pressure of which brake on the screw nut f
is regulated by the thumbscrew h.
The action of the parts is as follows;-On the lowering of the jointed arm b and its
pendent lamp carrying arm e the sliding tube e and the axial screwed rod g engaged
therewith are withdrawn from the fixed tube d of the telescopic arm D, the screwed
rod g in passing through the screw nut f causing the rotation of the said screw nut.
On the release of the jointed arm 6 the friction of the brake i on the screw nut f
brings the parts to rest, that is, retains the parts in the position to which they have
been brought.
g
On the raising of the jointed arm 6 and parts carried by it the sliding tube e
advancing on the axial screwed rod y disengages its pinion end g² from the cap e² of
the sliding tube e as indicated in dotted lines in Figure 3. The said pinion end g²
of the screwed rod g, coming in contact with the bottom of the hollow boss e³ the said
screwed rod advances into the fixed tube d and through the screw-nut by a screwing
motion. The screw nut consequently remains stationary on the raising of the
jointed arm and resistance to the said raising is thereby obviated. On the release of
the parts, the sliding tube e descending slightly causes its engagement with the pinion
end g of the screwed rod g and the parts are held in position.
The application of my invention to chandeliers, electroliers, gas pendants and
other hanging lamps differs in no essential respect from its application to a gaselier
as herein before described and represented.
Figure 6 represents in side elevation a gas bracket containing my improvements
the parts being indicated in their lowered position in dotted lines. The parts of the
gas bracket do not differ from those of the gaselier hereinbefore described, the centre
or down pipe a of the latter being replaced by the wall plate or pateras A of the
former. The parts of the gas bracket are marked with the same letters of reference as
corresponding parts of the gaselier.
Although I have described and represented and prefer to arrange the larger tube of
the telescopic arm uppermost yet the said telescopic arm may be inverted with the
same or nearly the same effect.
The application of the said invention to brackets for carrying oil or electric lamps
differs in no essential respect from its application to a gas bracket.

page_text: Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed I declare that I claim as my
invention of improvements in chandeliers, gaseliers, gas pendants and gas brackets
and other hanging lamps,
The combination with the jointed arms of chandeliers, gas brackets and the like an:1
the parts carried by the said jointed arms, of telescopic regulating and fixing arms the
parts of which are constructed and arranged as follows, the telescopic regulating and
fixing arms consist of two tubes one sliding within the other the larger tube being
jointed preferably to the centre or down pipe of the chandelier or the like, or in the
case of a bracket to the wall plate or pateras, and the smaller tube being jointed preferably
to the jointed arm the said tubes containing an axial quick threaded screw working in
a screw box in the larger tube, the said screw box being operated upon and its free
rotation prevented by a frictional brake, the axial screw being engaged with the
sliding tube when the parts are at rest and also during the lowering of the jointed
arm so as to prevent rotation of the said axial screw but being disengaged from the
sliding tube on the raising of the jointed arm and permitted to rotate through the
Screw box of the fixed tube substantially as hereinbefore described and illustrated in
the accompanying drawings.
Dated the Fifteenth day of August 1896.
THOMAS FORD.