IMPROVEMENTS ELECTRIC INCANDESCENT LAMPS AND IN SWITCHES FOR SAME
Year: 1883

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PROVISIONAL SPECIFICATION left by Herbert John Haddan'at the Office
of the Commissioners of Patents on the 13th July 1883. Communicated to
him from abroad by Charles G. Perkins of New York, United States.
HERBERT JOHN HADDAN, of Kensington, Middlesex, "IMPROVEMENTS
ELECTRIC INCANDESCENT LAMPS AND IN SWITCHES FOR SAME," a communication to
me from abroad by Charles G. Perkins of New York, United States...
IN
The Invention relates to an Electric Incandescent Lamp, having an opening in
the wall of its neck, through which plaster of paris is poured for the purpose of
holding the electrical conductors in position, and also for holding suitable means
therein in such a manner as will hold the lamp rigid to a switch box made therefor.
The invention relates to a glass switch box divided into two apartments, the
upper apartment is connected with the lower apartment by means of a hinge. The
lower apartment is provided with a central metallic tap and is held in position by
means of plaster of paris in which cavities are made for the reception of springs
having metallic plates connected therewith, each of which is electrálly connected
with the main conductors of the lamp. The upper glass. apartment is provided with
two annular grooves on the top thereof each of which receives a corresponding
metallic plate, having springs connected with the under side thereof., One of the
plates represents the positive pole while the other represents the negative.
The invention relates to a cut-out wire which is passed into a tube of insulating
material, the whole is then passed into a metallic tube, which is held rigid to the
top of the glass chamber. The tin wire is electrically connected with the annular
plate representing the positive pole, the lower end of the tin wire is brought into
electrical contact with the metallic plate of the lower glass chamber, the said
inetallic plate representing the positive pole.
The invention relates to having an upright screw placed on the centre of the top
of the upper glass chamber, the said screw is provided with a shank, which passes
down and through the body of the glass top, and then through two metallic strips,
one of which is electrically connected with the annular metallic plate representing
the negative pole of the lamp. The second metallic strip is provided with a
projection extending downward, to which is fastened a circular plate of vulcanized
fibre or other insulating material. The other side of the insulating plate is
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page_text: provided with a semi-circular metallic plate electrically connected with the metallic
strip by means of metallic pins. The insulated plate is provided with an incline
arising from its surface, off of which a switch snaps on to the semi-circular plate,
at the other end of the semi-circular plate the switch spring snaps down into a
depression made in the said insulated plate.
The invention relates to a metallic strip, the uppermost end of which is provided
with a foot which rests against the underside of the glass top of the switch box;
the said metallic strip is also provided with an aperture through which the pin
holding the switch spring passes, thus forming a perfect electrical connection at
that point; the lower end of the aforesaid inetallic strip is provided with an
enlargement thereon, which rests against the metallic plate of the lower glass
chamber, said plate representing the negative pole of the lamp.
The invention relates to arranging within the neck of an incandescent lamp, a
suitable quantity of mineral wool supported at the top and bottom by discs of
paper or other suitable material, the whole supported by plaster of paris having a
central projecting metallic screw and a cylindrical metallic projection provided with
an annular bevel projecting below the base of the lamp.
The Invention relates to a hollow glass case of a cylindrical shape, open at both
ends, the upper end being provided with a bevel projection integral therewith and
corresponding with a metallic sleeve made in halves and mounted on said bevel
projection.
1.
The invention relates to a disc made of insulating material mounted with a
straddle screw nut and two flat springs one of which is electrically connected with
the metallic straddle screw nut, while the other is.electrically connected with the
metallic rings made in halves by an upright spring provided with a depression
corresponding with a bead integral with the lower portion of the aforesaid metallic
ring in halves, the whole mounted on a glass base provided with a central metallic
sleeve provided with screw threads on the inner circumference at, the lower portion
thereof, while the upper end thereof is provided with screw threads on its outer
circumference corresponding with the threads in the disc of insulating material.
The invention relates to mounting a spiral spring on the ends of the wires
connected with the clamp, said wires representing one of the poles of the lamp.
The upper part of the aforesaid spiral is made so as to fit the wire tightly, thus
securing a perfect electrical contact therewith. The lower portion forms the spring.
which engages with the circuit connections of the switch.
The invention relates to a disc of plaster of Paris provided with cylindrical
apertures which serves as a guide for the aforesaid spiral spring; said disc has one
or more notches cut in the edge thereof for the purpose of admitting soft plaster of
Paris to be poured through when sealing it in the base of the lamp.
The invention relates to a series of metallic rings insulated from each other by
plaster of paris the whole forming one solid inass and mounted on the top of the
switch box; each of the aforesaid metallic rings represent one and the same
pole of the lamp and are electrically connected with the current counections
thereof..
The invention relates to a glass attachment provided with a cylindrical hollow
having a series of grooves therein for the reception of metallic wires fastened
thereto in any suitable manner, the upper end of each wire extends therefrom
perpendicularly and is connected with the metallic rings arranged on the top of the
switch box. The aforesaid glass attachment is fastened to a right-angle metallic
bar having an upright screw on the horizontal portion thereof; said screw passes
up and through the glass top of the switch box and is held rigid thereto by a screw
nut or other suitable means, the other portion of the metallic bar is provided with
a slot extending from the end thereof to a suitable distance above.
The invention relates to a disc of fibre or other suitable material held rigid to
the top of the glass base of the switch box by a metallic screw nipple, the lower
portion of which receives the nipple of an ordinary gas fixture or electrolier; the
aforesaid fibre disc is provided with an upright 'metallic standard having a
T

page_text: tightening screw near the top thereof, said standard representing one of the poles
of the lamp; the fibre disc is also provided with a metallic screw representing the
other poles of the lamp. The Base of the aforesaid Standard is electrically
connected with one of the wires leading to the main line wires, the aforesaid screw
is electrically connected with the other wire leading to the main line.
The invention relates to a metallic switch spring having a series of fingers of
different length the ends of which terminate on the same angular alignment; said
spring is rigidly fastened to a swivel sleeve mounted on a spindle having a screw
thread on the smaller end thereof which enters the head of a second spindle by
which it is secured thereto. The second spindle passes through the glass wall of
the switch box and is secured to a switch handle; the second spindle is also provided
with a stop-collar, fixed to the wall of the switch box.
The invention relates to a spiral spring having one of its ends rigidly fastened
to the head of the aforesaid second spindle, engaging with a notch made on the
end of the swivel sleeve, said spiral springs encircle the spindle carrying the said
swivel sleeve
The invention relates to arranging a series of irregular, scolloped carbons within
the vacuous chamber of an electric incandescent lamp in a manner that will bring
one or more of the broad sides of the carbon to view when illuminated.
The invention relates to a washer made of any suitable material placed within
the neck of the globe of an electric incandescent lamp, the washer preventing the
plaster of paris from running up into the neck of the globe further than is desired,
the washer also answers for a tag or label upon which may be printed or written
the name of the Company manufacturing the lamp, giving the date of the month,
year, and the number of ohms resistance which the carbons may have.
The invention relates to a plug composed of plaster of paris, having a series of
metallic rings and a screw plug sealed therein, the whole arranged within the neck
of the globe of an electric incandescent lamp.
The invention relates to electrically connecting one pole of each carbon filament
to a central metallic screw plug, sealed within a plug of plaster of paris, and
electrically connecting the other pole of each carbon filament to separate metallic
rings sealed within said plug.
The invention relates to a carbon filament holder having a glass bead encircling
its shank; said bead is provided with an annular rim integral therewith which
enables the glass to be sealed thereto to catch on easily, thus sealing the bead in
the base of the vacuous chamber without interfering with the parts from which
the shank projects.
The invention relates to a metallic cylindrical cup having a sound or flat pro-
jection extending from the base thereof and sealed in the central portion of the
base of the globe, said cup holding one end of several carbons. The remaining ends
of the carbous are held in a single metallic cup of the same construction as the one
stated above. The cups are filled with carbon paste and the carbon filaments
inserted therein and arranged so as to come in contact with a series of plates or
wires of a switch box made therefor, said plates representing one pole while the
circuit connections of central metallic cup represents the other.
The invention relates to a metallic wire having one end made into a spiral of a
cone shape which is filled with carbon paste into which the ends of the carbon
filaments are inserted, the wire extending from the spiral portion thereof is sealed
in the base of the globe. The cups as described are for round carbons but when
using flat carbons the receptacles into which they are inserted are flattened
accordingly.
The invention relates to a thin, metallic strip of a springy nature provided at
one end with a concaved tip; the other end is provided with a flat surface having
an elongated slot, for the reception of a tightening screw. The said metallic strip
is made in a shape that will correspond to the contour of the globe of an electric
incandescent lamp.

page_text: The invention relates to an adjustable reflector mounted on the said metallic
strip.
The invention relates to having the ends of the electrical conductors within the
neck of an incandescent lamp enlarged and held in position within the said neck
by plaster of paris or other suitable material for the purpose of insulating the said
conductors from each other and holding them in position so that a good electrical
connection can be made, when the said lamp is mounted on a switch specially
adapted for it.
The invention relates to having a small opening on the neck of an incandescent
lamp placed at a suitable distance above its. base. The said opening extends from
the exterior to the interior through, which the plaster of paris is poured or forced
until it shall have reached the said small opening.