IMPROVEMENTS IN AND RELATING TO ELECTRIC LETTERS
Year: 1882

page_text: LETTERS PATENT to William Chadburn of Liverpool in the County of
Lancaster for an invention of "IMPROVEMENTS IN AND RELATING TO ELECTRIC
LETTERS PATENT to William Chadburn of Liverpool in the County of
Lancaster for an invention of "IMPROVEMENTS IN AND RELATING TO ELECTRIC
LAMPS AND GENERATING ELECTRICITY THEREFOR.
PROVISIONAL SPECIFICATION left by the said William Chadburn at the
Office of the Commissioners of Patents on the 12th June 1882.
WILLIAM CHADBURN, of Liverpool, in the County of Lancaster "IMPROVEMENTS
IN AND RELATING TO ELECTRIC LAMPS AND GENERATING ELECTRICITY” THEREFOR."
My Invention relates to certain improvements in that class of electric lamps
known as arc lamps and in what are known as dynamo-electric machines.
"
My Improvements in the arc lamp consist in a particular arrangement and com-
bination of parts forming the grip, or device for holding, feeding and regulating
the upper carbon. Such device is composed of three vertical levers of the first
kind pivotted to a ring suspended by adjustable stops from the top plate, or cover
of the lamp. The lower ends of the levers being made to grip the carbon by the
upper ends being expanded by a cone, which is moved, or lifted through the agency
of the primary solenoid by a lever of the first kind which has its fulcrum attached
to the upper plate of the lamp. The other end of the lever being actuated by a
shunt solenoid. The lower carbon is suspended and supported by rods attached
to, but insulated from the lower plate of the lamp frame, so as to come below and
in vertical line with the upper, or adjustable carbon, which latter extends through
the upper plate, or frame of the lamp. The primary solenoid and the shunt
solenoid are mounted over the top plate of the lamp and their arinatures are made
to act as dash pots, a cut out, or resistance coil and accessary appliances being
provided, as usual. The carbons are surrounded by a glass globe and the upper
part of the lamp is within a casing and is provided with a shade.
The operation of this part of my Invention is as follows:-The carbons being in
position the primary and shunt solenoids through the agency of the gripping

page_text: device herein described regulate the position of the upper carbon so as to regulate
and maintain the correct arc.
My Improvements in the dynamo electric machines consist
First. In the arrangement of the field magnets, which are vertical in position
with massive poles. The magnets are composed of two pairs, the poles of the
inner limb of each magnet partly encircle the upper portion of the armature, the
poles of the outer limbs partially encircle the lower portion of the armature and
also form the base of the machine.
Second In the armature being composed of a coil, or core of iron wires wound
round at intervals with copper wire and forming a spiral of several revolutions,
occupying the space equal to the width of the poles. The connections from the
copper coils of the armature may be led between the coils of the spiral to the
"collecting boss" on the spindle. The terminal points of the iron wire coil, being
the core are attached to the respective ends of an iron tube which surrounds (but
is insulated from, the spindle) and which completes the circuit of the iron wire
The spiral coil may lay in a groove formed on a wooden drum, or be carried
by radial arms cast on the iron tube
core.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Chadburn in the Great Seal Patent Office on the
11th December 1882.
WILLIAM CHADBURN, of Liverpool, in the County of Lancaster "IMPROVEMENTS
IN AND RELATING TO ELECTRIC LAMPS AND GENERATING ELECTRICITY THEREFOR
تو
My Invention relates to certain improvements in that class of electric lamps,
known as arc lamps; and in what are known as dynamo electric machines.
My Improvements in the arc lamp consist in a particular arrangement and
combination of parts forming the grip, or device for holding, feeding and regulating
the upper carbon. Such device is composed of, say three vertical levers of the first
kind, pivotted to a ring suspended by adjustable stops from the top plate, or cover
of the lamp. The lower ends of the levers being made to grip the carbon by the
upper ends being expanded by a cone which is moved, or lifted through the agency
of the primary solenoid by a lever of the first kind, which has its fulcrum attached
to the upper plate of the lamp, the other end of the lever being actuated by a
shunt solenoid. The lower carbon is suspended and supported by rods attached to,
but insulated from the lower plate of the lamp frame so as to come below and in
vertical line with the upper, or adjustable carbon, which latter extends through
the upper plate, or frame of the lamp. The primary solenoid and the shunt
solenoid are mounted over the top plate of the lamp and their armatures are made
to act as dash pots, a cut out, or resistance coil and accessary appliances being
provided as usual. The carbons are surrounded by a glass globe and the upper
part of the lamp is within a casing and is provided with a shade.
The operation of this part of my Invention is as follows: The carbons being in
position, the primary and shunt solenoids through the agency of the gripping
device herein described, regulate the position of the upper carbon, so as to regulate
and maintain the correct arc.
My Improvements in the dynamo electric machine, consist in the arrangement
of the field magnets, which are vertical in position with massive poles. The
magnets are composed of two pairs, the poles of the inner limb of each magnet,
partly encircle the upper portion of the armature, the poles of the outer limbs
partly encircle the lower portion of the armature and also form the base of the
machine. The armature is composed of a coil, or core of iron ribbons wound round
at intervals with copper wire and forming a spiral of several revolutions occupying
the space equal to the width of the poles. The connections from the copper coils
of the armature may be led inside the coils of the spiral to the collecting boss on
the spindle. The terminal points of the iron ribbon coil, being the core, are con-
nected to each other so as to complete the circuit. The spiral coil may lay on a
wooden drum.
The beforegoing being the nature of my Invention, I will now proceed to
describe more in detail how the same may be carried out into practical effect and
for that purpose I have hereunto attached three sheets of Drawings illustrative of
my Invention. The Drawings are marked with letters and figures of reference
corresponding with those in the following description, like letters and figures
being used to denote the same, or corresponding parts throughout the various
views.

page_text: REFERENCE TO FIGURES 1 TO 6 INCLUSIVE
My Improvements in the arc lamp consist in the particular arrangement and
combination of parts forming the grip A, or device for holding, feeding and
regulating the upper carbon B of electric lamps known as arc lamps. The device
being the grip A is composed of a convenient number, say three vertical levers a
(of the first order) which are pivotted at a¹ to the ring b which is is suspended by
the adjustable stops c from the top plate, or cover D of the lamp. The lower ends
of the levers a are flanged out so as to grip the carbon B when the upper ends of the
levers a are expanded by the cone d. This cone d is moved, or lifted through the
agency of the primary solenoid E. By the lever F, which has its fulcrum F¹
attached to the upper plate D of the lamp. The other end of the lever F is
actuated by the shunt solenoid G. The lower carbon H is suspended and supported
by the rods I, which are attached to, but insulated from the lower plate J of the
lamp frame, so that such lower carbon H comes below and in vertical line with the
upper, or adjustable carbon B, which latter extends through the lower plate J,
the upper plate D and the frame of the lamp, as shown in the Drawing. The
primary solenoid E and the shunt solenoid G are mounted over the top plate D of
the lamp and their armatures, namely the armature e of the primary solenoid E
and the armature g of the shunt solenoid G are so constructed as to act as dash
pots as shown in the case of the primary solenoid E (see Figure 1) namely the
armature E is made hollow and filled with liquid and receives the piston e¹, the
rode of which is fixed to the bracket e³. This same construction of dash pot may
also be applied to the armature g of the shunt solenoid G. A cut out and
resistance coil and accessary appliances are provided as usual in lamps of this
description. The carbons BH are surrounded by a glass globe K and the upper
part of the lamp is contained within a casing L and is provided with a shade M.
The lead wire is represented by the sign + and the return wire is represented by
the sign
-
The operation of this part of my Invention is as follows: The carbons B and H
being in position the primary solenoid E and the shunt solenoid G through the
agency of the gripping device A herein described regulate the position of the upper
carbon B in relation to the lower carbon H so as to make, regulate and maintain
the correct arc
REFERENCE TO FIGURES 7 TO 10 INCLUSIVE
My improvements in dynamo electric machine consist in the arrangement of the
field magnets 2 which are vertical in position and have massive poles 3. The
magnets 2 are composed of two pairs. The poles of the inner limb 4 of each
magnet 2 partly encircle the upper portion of the armature 5. The poles of the
outer limb 6 of the magnets 2 partly encircle the lower portion of the armature 5
and are mounted on but insulated from the base 7 of the machine.-The armature 5
is composed of a coil, or core of soft iron ribbons formed in a series of rings each of
which is bent in a spiral form so that when the rings are connected they form a
continuous spiral, each ring also being connected magnetically, so as to form a
complete ring. The core is wound round at intervals with copper wire and forms
a spiral of several revolutions as shown at Figure 9 of the Drawings. The
armature 5 is contained within the poles of the inner limb 4 and the outer limb 6
of the marmota
The connections &. from the conner coils of the ormatura 5 ara
My improvements in dynamo electric machine consist in the arrangement of the
field magnets 2 which are vertical in position and have massive poles 3. The
magnets 2 are composed of two pairs. The poles of the inner limb 4 of each
magnet 2 partly encircle the upper portion of the armature 5. The poles of the
outer limb 6 of the magnets 2 partly encircle the lower portion of the armature 5
and are mounted on but insulated from the base 7 of the machine.-The armature 5
is composed of a coil, or core of soft iron ribbons formed in a series of rings each of
which is bent in a spiral form so that when the rings are connected they form a
continuous spiral, each ring also being connected magnetically, so as to form a
complete ring. The core is wound round at intervals with copper wire and forms
a spiral of several revolutions as shown at Figure 9 of the Drawings. The
armature 5 is contained within the poles of the inner limb 4 and the outer limb 6
of the magnets 2. The connections 8. from the
e copper coils of the ormatura 5 ara

page_text: led in grooves cut in the wooden drum 9 from the coils to the collecting boss 10 on
the spindle 11. The several copper coils are interconnected as usual. The terminal
points 12 and 13 of the iron ribbon coil being the core 14 of the armature 5 are
connected to each other by the soft iron strips 15, so as to complete the circuits.
The spiral coil being the the armature 5 lays on the wooden drum 9 as shown The
armature 5 is driven by the drum 16 on the spindle 11.
Having now described my Invention and shown how the same may be put into
practical operation, what I claim as my Invention and secured to me by Letters
Patent as aforesaid is:
First The gripping device A consisting of the levers a, the ring b and the cone d
operating as herein described for the purposes specified and as shown in the
Drawings hereto annexed.
Second The construction arrangement and combination of parts in connection
with the device A constituting an electric lamp of the arc type as herein described
and shown in the Drawings hereto annexed.
Third The dynamo electric machine consisting of the vertically arranged field
magnets 2, the inner poles 4, the outer poles 6 and the armature 5 constructed and
operating as herein described and shown in the Drawings hereto annexed.
Fourth The particular construction of the armature 5 consisting of the spiral
core 14 of soft iron ribbons coiled round at intervals with copper wire coils and
the connections 15, as herein described and shown in the Drawings hereto
annexed.
In Witness whereof, I, the said William Chadburn, have hereunto set my
hand and seal this eighth day of December, in the year of our Lord one
thousand eight hundred and eighty two.