COME DETECT DUIFICATION improvements in Are Electric Lamps.
Year: 1893

page_text: Date of Application, 25th Nov., 1893-Accepted, 20th Jan., 1894
COME DETECT DUIFICATION
improvements in Are Electric Lamps.
I WILLIAM JAMES DAVY of 161 Huddleston Road Tufnell Park N. London,
lechanical and Electrical Engineer do hereby declare the nature of this invention
nd in what manner the same is to be performed, to be particularly described and
scertained in and by the following statement :-
This invention has for its object certain improvements in arc electric lamps.
By means of such improvements I produce an arc lamp having little weight & of
compact & simple form.
1
1
1
торгоѵещение II АГС месите пащую.
I WILLIAM JAMES DAVY of 161 Huddleston Road Tufnell Park N. London,
Mechanical and Electrical Engineer 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:—
This invention has for its object certain improvements in arc electric lamps.
By means of such improvements I produce an arc lamp having little weight & of
a compact & simple form.
To make this invention more clear I have supplied a drawing +
Fig. No. I shewing elevation of lamp.
Fig. No. 2 shewing plan of lamp.
Fig. No. 3 shewing elevation of solenoids & brake gear which are shewn
removed from Fig. No. 1 for clearness.
Fig. No. 4 is a plan view of top traveller & holder.
Fig. No. 5 is a plan view of lower traveller.
Fig. No.
view of brake pulley wheel.
Fig. No. 7 is a view in plan of lower carbon holder.
Fig. No. 8 is a plan view of tail rod guide tie plate at foot of side rods.
I arrange the several parts as follows:-The whole of my mechanism is held &
fixed to an insulating plate A of some nonconducting material of which I prefer to
use celluvert.
I place two pairs of side rods a a¹ & b b¹ Fig. No. 1, made of steel or other
suitable metal, on the under side of this plate hereinafter called the crown plate, &
firmly fix the said side rods thereto by means of steel washer plates C C & C C¹
& nuts, the lower ends of the said side rods being firmly held by metal tie
plates FF.
The upper traveller B & carbon holder B¹ is built up, the carbon holder being
clamped & firmly held between two side plates hh', these plates also carrying
friction pulleys g g' g" which roll freely on or between one of the above pairs of
side rods a a¹ & thus guide the carbon while it is being consumed.
The lower traveller D is built up, the traveller being formed with two side
plates Figs. No. 1 & 5 & between the said side plates cu a spindle fixed thereto
is a friction pulley ; which rolls between the other pair of side rods b'. The said
plates are also held together by & carry the tail rod k which is firmly & rigidly
fixed thereto & passes through a hole in the bottom tie plate F¹ of the second
pair of side rods Figs. 1 & 8 which act as a guide to the said tail rod. The tail
rod terminates at its lower end in a taper point with a fly nut M. The lower
carbon holder N fits onto the said tapered end & is adjusted in its laternal
movements by the said fly out, thus allowing the lower carbon to be placed in line
with the upper carbon.
The lower carbon bolder Figs. 1 & 7 is made with two arms, & the boss is split
in two halves, when the carbon is inserted, & a taper screwed cone & nut, which
when screwed up firmly grips the carbon by reason of the springing action of the
said arms.
The brake pulley wheel O Fig. 6 is made in one piece of suitable metal & a
V groove P is formed in its central part, into which fits the brake block g Fig. 3.
The flat grooves R R¹ on either side of the V groove Fig. 6. round which the
cords S S or chains pass, one end of each being fastened to each of the said flat
grooves, & their other ends fastened to the top & bottom carbon traveller
respectively, namely the upper carbon to one flat groove & the lower carbon to the
Of brake pulley water.
Fig. No. 7 is a view in plan of lower carbon holder.
Fig. No. 8 is a plan view of tail rod guide tie plate at foot of side rods.
I arrange the several parts as follows:-The whole of my mechanism is held &
fixed to an insulating plate A of some nonconducting material of which I prefer to
use celluvert.
I place two pairs of side rods a a¹ & b b Fig. No. 1, made of steel or other
suitable metal, on the under side of this plate hereinafter called the crown plate, &
firmly fix the said side rods thereto by means of steel washer plates C C & C C¹
& nuts, the lower ends of the said side rods being firmly held by metal tie
plates F FI.
The upper traveller B & carbon holder B¹ is built up, the carbon holder being
clamped & firmly held between two side plates hh', these plates also carrying
friction pulleys g g' g" which roll freely on or between one of the above pairs of
side rods a a¹ & thus guide the carbon while it is being consumed.
The lower traveller D is built up, the traveller being formed with two side
plates Figs. No. 1 & 5 & between the said side plates cu a spindle fixed thereto
is a friction pulley which rolls between the other pair of side rods bb'. The said
plates are also held together by & carry the tail rod k which is firmly & rigidly
fixed thereto & passes through a hole in the bottom tie plate F¹ of the second
pair of side rods Figs. 1 & 8 which act as a guide to the said tail rod. The tail
rod terminates at its lower end in a taper point with a fly nut M. The lower
carbon holder N fits onto the said tapered end & is adjusted in its laternal
movements by the said fly nut, thus allowing the lower carbon to be placed in line
with the upper carbon.
The lower carbon bolder Figs. 1 & 7 is made with two arms, & the boss is split
in two halves, when the carbon is inserted, & a taper screwed cone & nut, which
when screwed up firmly grips the carbon by reason of the springing action of the
said arms.
The brake pulley wheel O Fig. 6 is made in one piece of suitable metal & a
V groove P is formed in its central part, into which fits the brake block g Fig. 3.
The flat grooves R R¹ on either side of the V groove Fig. 6. round which the
cords S S or chains pass, one end of each being fastened to each of the said flat
grooves, & their other ends fastened to the top & bottom carbon traveller
respectively, namely the upper carbon to one flat groove & the lower carbon to the

page_text: other flat groove, so that when the pulley is revolved the carbons approach to or
recede from one another.
The brake arm T Figs. No. 2 & 3 & its block y, the said block fitting into the
V groove of the said pulley, the brake arm T being pivoted to one end of the side
levers uu which are held, & oscilate on the same shaft as the said pulley, &
pass on either side of it. To this brake arm suspended by links V V' in a suitable
position is the core w of the series solenoid W.
To the other end of the said levers suspended by a link is the core w' of the
shunt solenoid W¹.
The said pulley, levers, etc. are carried by a suitable bracket X Figs. No. 2 & 3
fixed to the upper part of the crown plate immediately under the brake block, &
this pin catches the block when the leavers are oscillated by the shunt core, &
causes the brake to release the pulley. A light spring Z holds the brake block
down & prevents its jumping out of the V groove.
Instead of a dash pot I use a light spiral spring or springs H H which are fixed
in either or both of the solenoids W W₁ & underneath either or both of the soft
iron cores, the object of these springs being that when either core is in action the
spring forms a cushion, the spring action being regulated by a thumb screw, & by
this means the steadeness of the feed & the arc is regulated.
The solenoids are the well known differential type & are fixed opposite cach
other directly under the crown plate, & firmly held thereto by means of screws or
other suitable device; the lower ends of these solenoids are closed & retain the said
thumb screw.
I cover in the lamp with a metal hood K. which for convenience can be made in
two pieces each screwed to the crown plate.
The lower part is provided with suspension hooks E E' which carry the
globe G.
A reflector or shade F is attached to the lower edges of the hood.
The hood is electrically insulated from the mechanism of the lamp, & the whole
lamp is supported by an electrically insulated suspension pulley P Fig. No. 1.
It will be seen that the mechanism of this lamp is well insulated electrically, &
that the current can only flow around the coils & to the travellers, holders side
rods, & carbons.
The globe is made open only at its upper part, & thus there is no danger from
pieces of hot carbon falling about.
I place a diaphragm of mica & fix it directly below & to the ends of the side
rods, the diameter of the mica being about half an inch less than that of the globe.
This prevents the ash & fumes from accumalating upon the side rods, & the carbons
pass through a suitable hole in the mica disc.
This invention is suitable for either continuous or alternating currents, & in the
latter case the cores & bobbin tubes are laminated & split in the usual way.
In the accompanying drawing
:-
Fig. No. 1 is an elevation view of the lamp.
B is the upper traveller & B' the carbon holder with the friction pulleys g g'g".
D is the lower traveller & j the friction pulley, k is the tail rod fixed thereto
& its fly nut M.
N is the lower carbon holder & N' is the split boss, & N" the tapered nut.
a a¹ &
bare the side rods & C C¹ & C C¹ the washer plates.
ff the tie plates.
R R¹ the upper & lower carbons respectively.
Fig. 6 is the brake pulley wheel in elevation & plan.
Fig. 7 is a plan of the lower carbon holder.
A is the crown plate in Figs. 1 & 3 & No. 2 in elevation.
S S¹ the cords or chains Fig. 1.
t is the brake arm Figs. 2 & 3.
u u³ the side levers Kies

page_text: w w¹ the soft iron cores Figs. 2 & 3.
W W' the solenoids series & shunt respectively Fig. 3.
X is the supporting bracket Figs. 2 & 3.
Y is the stop pin Fig. 3.
Z is the brake block spring Fig. 3.
HH the spiral regulating springs within the solenoids Fig. 3.
E E are the globe suspension hooks Fig. 1.
G is the globe.
F the reflector or shade.
P the suspension pulley to carry the whole lamp.
The action of this lamp is as follows:
The current enters at one of the terminals say T & flows through the coils
of the series solenoids providing the carbons are touching, & if not, it first
flows through the shunt coils which is connected across the terminals T T¹ of
the lamp; this will cause the soft iron core to operate indirectly the brake &
release the pulley which will revolve & allow the carbons to touch; the current
will then flow through the series coils to the traveller & carbons, through the tail
rod & lower traveller & out through the terminal T' of the lamp.
Thus the soft core of the series solenoid is made to operate the brake, &
revolving the pulley strikes & maintains the arc until the carbons are consumed..
The feeding takes place by reason of the current becoming weaker or stronger
in either the series or shunt coils, & thus the brake is either released or put on,
allowing the pulley to revolve as stated & causing the carbons to be fed together
by the above mechanism, & a steady light is thus maintained.
I may modify the form of this improved are electric lamp according to require-
ments, without departing from the nature of my invention.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is :-
1. Improvements in arc electric lamps as effected by the combination of the
several parts substantially as herein described & illustrated.
2. In arc electric lamps the brake pulley wheel, & brake substantially as herein
described & illustrated.
3. In arc electric lamps the combination of the levers, links, & cores substan-
tially as herein described & illustrated.
4. In arc electric lamps the side rods substantially as herein described &
illustrated.
5. In arc electric lamps the combination of the upper & lower travellers with the
side rods substantially as herein described & illustrated.
6. In arc electric lamps the lower carbon holder substantially as herein described
& illustrated.
7. In electric arc lamps the regulating springs within the solenoids substantially
as herein described & illustrated.
Dated this 25th day of November 1893.
WILLIAM J. DAVI