Improvements in connection with Arc Lamps.
Year: 1897

page_text: Date of Application, 5th Aug.,
1000
1897
25th Luno
1908
Improvements in connection with Arc Lamps.
We, WALTER JOHN HUBERT JONES, of 105, Vyse Street, Birmingham, in the
County of Warwick, Engineer, FREDERICK JOHN CHAPLIN, of 233, Park Lane,
Aston, Birmingham aforesaid, Wire Drawer, and SAMUEL JEVONS, of the Minories,
Birmingham. aforesaid, Electrical Engineer, do hereby declare the nature of our
said invention to be as follows:-
Our invention has for its object improvements in connection with arc lamps by
which we are enabled to automatically and effectually regulate the carbons so as
to ensure a steady and constant light.
In carrying our invention into practice we connect the series and the shunt coils
together by a lever each end of which is attached to their respective moveable
cores which lever is pivotted at or about the centre to one end of another lever or
connecting rod the other end of which is pivotted to a link or connection which
operates two short levers and on the other ends of these levers are formed two V or
similar shaped bearings. Mounted in these bearings is a spindle which we call the
lifting spindle" and fixed on the centre of this spindle between the V shaped
bearings are two groove pulleys over which the cords or chains to which the
carbons are attached pass. Each of the ends of this spindle also bear upon two
friction rollers mounted in suitable brackets connected to the frame of the lamp.
Fixed at the back of the fulcrum of the two short levers and in the same plane
with the grooved pulleys are two idle pulleys over which the cords or chains pass
and below these idle pulleys is a guide pulley fixed to the. framework of the lamp
around which one of the cords pass and thence over another guide pulley opposite.
When the carbons are ignited the current passes to the series coil and forces back
the connecting rod which causes the two short levers to rise until they meet the
lifting spindle, thus raising the lifting spindle, thereby raising the top carbon, but
when this carbon is lifted too high the current is caused to act upon the shunt coil,
thus lowering the lifting spindle and freeing it in its bearings by which means the
top carbon is lowered, thereby automatically and effectually maintaining the
carbons the required distance apart. Special arrangements may be provided for
regulating the lifting spindle if found necessary.
Joy of August 1897

page_text: Aston, Birmingham aforesaid, Wire Drawer, and SAMUEL JEVONS, of the Minories
Birmingham aforesaid, Electrical Engineer, do hereby declare the nature of ou
said invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
1-
Our invention has for its object improvements in connection with arc lamps by
which we are enabled to automatically and effectually regulate the carbons so a
to ensure a steady and constant light.
In carrying our invention into practice we connect the series and the shun
coil together by a lever each end of which is attached to its respective solenoids o
magnets which lever is pivotted at or about the centre to one end of another leve
or connecting rod the other end of which is pivotted to a link or connection which
operates two short levers and on the other ends of these levers are formed two V o
similar shaped bearings. Mounted in these bearing is a spindle which we cal
the lifting spindle and fixed on the centre of this spindle between the V shaped
bearings are two groove pulleys over which the cords or chains to which the
carbons are attached pass. Each of the ends of this spindle also bear upon two
friction rollers mounted in suitable brackets connected to the frame of the lamp
Fixed at the back of the fulcrum of the two short levers and in the same plan
with the grooved pulleys are two idle pulley over which the cords or chains pass
and below these idle pulleys is a guide pulley fixed to the framework of the lamp
around which one of the cords pass and thence over another guide pulley opposite
When the carbons are ignited the current passes to the series coil and forces back
the connecting rod which causes the two short levers to rise until they meet the
lifting spindle thus raising the lifting spindle thereby raising the top carbon, but
when this carbon is lifted too high the current is caused to act upon the shunt
coil thus lowering the lifting spindle and freeing it in its bearings by which
means the top carbon is lowered. thereby automatically and effectually maintaining
the carbons the required distance apart. Special arrangements may be provided
for regulating the lifting spindle if found necessary.
In order that our invention may be more clearly understood and easily carried
into practical effect we have appended hereunto two double sized sheets of drawings
upon which we have illustrated examples of our improved lamp.
Figure 1 is an elevation of a portion of a focussing arc lamp, shewing our
improvements applied thereto.
Figure 2 is a plan view of Figure 1.
Figure 3 is an elvation of a portion of a non-focussing arc lamp shewing a
modified form of our improvements applied thereto.
Figure 4 is a cross sectional plan view of Figure 3 taken on the line ab.
Figure 5 is a similar view to Figure 4 taken on the line y of Figure 3.
In carrying our invention into practice we connect the series and the shunt
coils A and A¹ together by the lever B3 which is pivoted at 61 and each end of this
lever is attached to its respective solenoid or magnet a² and a³. This lever Bis
also pivoted at or about the centre to one end of the lever or connecting rod 1)
the other end of which is pivoted to the link or connection d' which operates the
two short levers and d³ and on the opposite ends of these short levers are formed
V or similar shaped bearings d. Mounted in these bearings is the spindle E
which we call the lifting spindle and mounted on the centre of this
lifting spindle between the bearings are the grooved pulleys e¹ and e over
which the cords or chains F and For their equivalent to which the
carbons, are attached pass. The ends of the lifting spindle E bear upon two
friction rollers J and J or other suitable bearing which are mounted in the
brackets fixed to or forming part of the frame of the lamp. Fixed at the rear
of the fulcrum of the levers and and in the same plane with the pulleys e¹
and are two idle pulleys e³ and et over which the cords or chains also pass and
mounted on the frame of the lamp below these idle pulleys is the guide pulley
around which the cord. F passes and thence over another guide pulley also
mounted on the frame of the lamp.
"...

page_text: As the current of electricity passes through the series coil A it causes the
lever B which is connected at this end to the solenoid or magnet a³ to be drawn
inwards at this end thus forcing the connecting rod I back also, thereby raising
the two levers and d³ and consequently the lifting spindle E and pulleys e¹ and
over which the chain or cord F passes by which means the top carbon which is
attached to the cord or chain is raised to the required distance from the bottom
carbon but should this carbon be lifted 'too high the current of electricity acts
upon the shunt coil A¹ thereby causing the end of the lever B connected to the
solenoid or magnet a³ to be drawn inwards thus drawing the connecting rod I)
out again and lowering the two levers d² and d and lifting spindle E and pulleys e¹
and until the spindle reaches the roller or other bearings J and J¹ thereby
releasing the spindle in its bearings d and allowing it to revolve slowly in the
roller bearings by which means the carbons are automatically and effectually
maintained the required distance apart.
At Figures 3, 4 and 5 we have shewn a modified form of our lamp. In this
case we connect one'end of the rocking levers K to the series coil A or a series and
shunt coil may be used by means of the solenoid or magnet k¹ the other ends of the
levers are formed with the slots 2 which work on the pivots 3 fixed in the support
or frame L. Also mounted on this pivot are the discs or their equivalents M and
fixed eccentrically to these discs is the pivot or pin m¹ on the ends of which the
levers or connecting rods N are mounted. These levers are pivoted at their other
ends to the support or frame L' and the ends which are mounted on the pin m'
are formed with the slots n¹ for the pin to work in. Pivoted at or about the centre
to these levers N are the arms n² which carry the brake blocks n³ and these brake
blocks bear upon the inner surface of the brake wheels P which are fixed on the
lifting spindle p¹ mounted in the bearings a fixed to the frame of the lamp. Or
the brake blocks may bear against the outside of the brake wheels. Also fixed on
the lifting spindle p¹ between the brake wheels P is the pinion wheel 23 which
gears with the rack formed on the carbon rod S which carries the carbon holder R
in the centre of the lamp.
As the current of electricity passes through the series coil it draws the solenoid
or magnet inwards thereby lifting the rocking levers K and consequently the
levers N which action causes the brake blocks to bear against the inner surface of
the brake wheels and as the solenoid or magnet continues to be drawn inwards the
brake blocks lift the brake wheels P and the lifting spindle p¹ in its bearings thus
raising the pinion wheel 23 and also by which means the carbon rod S and the
carbon holder R which is attached to it are also lifted thereby raising the carbon
to the required height, but as the carbon continues to burn the solenoid or magnet
lowers thus lowering the levers K and N thereby slightly releasing the pressure
of the brakeblocks on the brake wheels and allowing the spindle p¹ and pinion
wheel p³ to revolve by which means the carbon rod S slowly feeds the carbon as it
is consumed. If desired the lamp as shewn at Figures 3, 4 and 5 may be made a
focussing lamp in which case we may use the chains or cords and balance gear as
shewn at Figures 1 and 2.
Our improvements may be applied to arc lamps with one or more pairs of carbons
and the lamps may be made in the enclosed form if desired and with focussing or
non-focussing by means of the usual pulleys or balance gear.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
CLAIMS.
First: In arc lamps the mechanism or device for regulating the feed of the
top and bottom carbon or carbons by means of levers and d³ on the ends of which
the lifting spindle E is mounted in V or similar shaped bearings the said levers (2
and being connected to a rod such as D the other end of which is pivoted to the
lever B by which means in combination with a magnet or solenoid the carbon is

page_text: raised and lowered and the whole operated in the manner and for the purpose sub-
stantially as herein set forth and as shewn at Figures 1 and 2.
Second-In arc lamps the mechanism or device for regulating the feed of the
carbon or carbons by means of brake blocks such as acting upon the brake
wheels P which brake blocks are carried by the arms n² pivoted to levers or con-
necting rods such as N the said levers being actuated by rocking levers such as K
the whole being operated in combination with a suitable magnet or solenoid in
the manner and for the purpose substantially as herein set forth and as shewn at
Figures 3, 4 and 5.
WALTER JOHN HUBERT JONES,
FREDERICK JOHN CHAPLIN,
SAMUEL JEVONS,
By George Barker,
Fellow of the Chartered Institute of Patent Agents,
Agent for Applicants, Birmingham.