Year: 1899

page_text: We, VERITYS LIMITED, Electrical Engineers, and WILLIAM REGINALD RIDINGS,
Electrical Engineer, both of Plume Works, Aston, in the County of Warwick,
do hereby declare the nature of this invention to be as follows:r
.
This invention relates to electric arc lamps, and consists, firstly, of the improve-
ments hereinafter described in the carbon feeding and controlling mechanism,
and, secondly, in the particular formation of the glass globe formning the arc
chamber and in the means hereinafter specified for attaching it to the arc lamps'
frame, the latter, or second part, being distinctive in its application to what
are known as " enclosed' arc lamps.
"
The carbon feeding and controlling mechanism according to this invention is
as follows: A yoke or cross bar carrying the positive carbon electrode and its
carrier is arranged to move vertically up and down between the head plate and bed
plate of the arc lamp's frame upon a yoke-carrier, which is mounted upon ver-
tical guide rods, and which has of itself a small movement up and down upon
the said rods. The yoke-carrier is preferably a tube or sleeve, or tubes or
sleeves, fitting over one, or both, of the guide rods and which has, or have, at
top and bottom an outwardly extending bracket, or coupling bars, between which
a vertically disposed locking rod or bar capable of aspartial rotation, is placed
the said rod or bar finding bearings within the said bracket extensions or
coupling bars so that if the yoke-carrier is moved up and down on the guide
rods of the framing this rod or bar moves as one with it. The yoke or cross
bar makes contact with the yoke-carrier by anti-friction rollers, so that its move-
ment on the carrier is a free one, and within it is formed a vertical hole through
which passes the rod or bar before described upon the yoke-carrier. The cross
section of this rod or bar and the shape of the hole in the yoke through which
the said bar passes is such that a twisting or part rotating movement of the bar
jams the said bar in the hole and fixedly connects the yoke to it, in which posi-
tion the said yoke, yoke-carrier, and twisting bar are one piece and must all
move together. So long as the twisting bar is free in the hole of the yoke the
latter can move up and down upon the yoke-carrier independently. Thus, does
the twisting bar become the locking and releasing element of the yoke upon the
yoke-carrier.
The twisting bar is controlled as follows:-Connected with the core of the
series electro magnet is the one end of a lever fulcrummed in a suitable way to
the head plate above the yoke-carrier, the other end of the said lever being
coupled to a second lever or arm, fulcrummed to and carried by the rising and
falling yoke-carrier and connected by a bifurcation to the twisting bar or rod
as aforesaid, so that the initial movement of the first lever in one direction causes
a sufficient twisting of the locking bar within the hole of the yoke to grip onto
the said yoke, the further movement of the said first lever then causing the
yoke carrier, locking bar, and yoke to move together upwardly to strike the aro;

page_text: the positive carbon electrode as before stated being connected to the said yoke.
To feed the carbons before the arc is struck the reverse movement takes place,
that is to say, the yoke and its carrier and the second lever moved bodily in a
downwardly direction (the series electro magnet releasing gradually the first lever
to allow of it) until the free end of the second lever, or a projection upon it,
comes against an adjustable stop fixed upon one of the frame rods of the lamp
when, as the movement of the first lever continues, the second lever is rocked
by the stop to operate the locking bar and momentarily free the yoke upon its
carrier, so that the said yoke may fall to feed the carbons.
The negative carbon electrode inay be either a fixture, as in the case of an arc
lamp of the enclosed type, or be suspended over a pulley from the positive carbon:
holder, the last named being weighted.
It is to be understood that the series and shunt solenoids and the weighted
positive carbon holder controll between them the movement of the first lever
which is connected with the core of the series electro-magnet.
According to the second part of this invention the globe or are chamber
enclosing the carbon's points is a glass bulb or cylinder closed at bottom and
open at top, the said top having formed upon it an outwardly extending ring-
flange which is adapted to bed onto an asbestos or other suitable seating on the
underside of the lamp's frame. The closed bottom of the glass bulb or cylinder
is all glass, and there is nothing on the underside of the globe to cast shadows.
To attach the globe or are chamber to the frame of the lamp, pivot buttons,
carried' upon short spring-actuated rods, are fixed to the lamp's frame so as to
engage the ring flange of the globe underneath and exert a clamping action of the
said flange onto the asbestos seating.
A
.
T
1000
-
W. P. THOMPSON & Co.,
11, Burlington Chambers, New Street, Birmingham,
Patent Agents for the Applicants.
We, VERTTYS LIMITED, Electrical Engineers, and WILLIAM REGINALD RIDINGS,
Electrical Engineer, both of Plume Works, Aston, in the County of Warwick,
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 fol-
lowing statement:
-
This invention relates to electric arc lamps, and consists, in the first part, of
the improvements hereinafter described in the mechanism for feeding and con-
trolling the carbons. and, in tlie second part, to the formation of the glass globe
constituting the arc chamber and in the means for attaching it to the arc lamp's
frame, this latter part of the invention being distinctive in its application to
are lamps of the "enclosed" type.
The mechanism for feeding and controlling the carbons as according to the
first part of this invention is as follows:-A yoke or cross-bar carrying the
positive carbon electrode and its carrier or socket is arranged to move vertically
ap and down between the head and bed plates of the arc lamp's frame upon a
yoke-carrier mounted upon vertical guide rods extending between the said head
and bed plates and coupling them, the said yoke carrier having itself a small
movement up and down upon the said rods or upon one of them. The yoke-
carrier is preferably a sleeve or tube, or a number of such, fitting over one or

page_text: .
both of the guide rods, and which has, or have, at top and bottom an outwardly
extending bracket or coupling bar, between which a vertically disposed locking
bar or rod, capable of a partial rotation, is placed, the said bar or rod having
bearings at each end within the said brackets or bars so that if the yoke-carrier
is moved up and down on the guide rods, or one of them, the locking bar moves
as one with it. The yoke or cross bar, as aforesaid, slides over a tube, or tubes,
of the yoke-carrier by the help of antifriction rollers so that its movement on
the said tube or tubes is a free one, and within it is formed a vertical hole
through which passes the locking bar or rod before described as upon the yoke-
carrier. The cross-section of the locking bar and the shape of the hole in the
yoke through which it passes is such that a twisting or part-rotating movement
of the locking bar jams the said bar in the hole and fixedly connects the said yoke
to it (the bar), in which position the said yoke-carrier and locking bar must all
move as one piece: If the locking bar is free in the hole of the yoke the latter
can move up and down upon the yoke-carrier independently.
The locking bar as aforesaid is controlled from the cores of the electro-magnets
by a lever and an adjustable stop, the former, or lever, fulcrummed to the
rising and falling yoke carrier, coupled to the twisting locking bar by a bifur-
cation and a stud, and connected to the core of one of the electro magnets by
a link, and the latter, or stop, attached to adjust upon one of the guide rods
within the range of one of the ends of the said lever. The twisting of the
locking. bar to lock it and the yoke together, and the untwisting to release these
parts, is accomplished from the movement of the cores of the electro magnets,
and from the stop, through the medium of the lever and link; the parts operating.
in the manner hereinafter described.
An arc lamp of the enclosed type having the first part of this invention applied
is illustrated in the accompanying sheet of drawings, Figs. 1 and 2 being eleva-
tions with the parts of the feeding and controlling mechanism in the positions
they assume when, the arc is struck. Fig. 2 differs from Fig. 1 inasmuch as
some of the parts are removed and broken away in order to exhibit more clearly
those which lie at the back in Fig. 1. Figs. 3, 4, and 5, are horizontal sections
of the principal parts of the mechanism, Fig. 1, on the dotted lines A, B,
and C, Fig. 2 whilst Fig. 6 is a like view as Fig. 5 but showing the yoke or
cross bar tree of the locking bar. In these figa. of the drawings a³, a are the
head and bed plates of the arc lamp's frame a, and ata are frame rods rigidly
connecting the said plates and forming guides for the feeding and controlling
mechanisms of the carbons. c is a yoke-carrier formed of a cylindrical tube or
sleeve and bracket extensions ³, c, the said carrier surrounding the guide
rod at a loose fit and having a limited movement thereon.
d is a locking bar or rod running the full length of the yoke-carrier and
carried by it through its ends, d³, having bearings in the ends c³, c, of the
brackets, c, as aforesaid. This locking bar is parallel with yoke-carrier c and
can rotate upon its ends d, d³, within the brackets c³, c, independent of the yoke-
carrier. It is of an elliptical cross section, and a stud d' having a roller d³ upon
it projects from one of its sides.
e is a yoke or cross bar carrying the positive oarbon electrode f and its
socket, the said socket and electrode weighting the said yoke to pull it down
in the direction of the arrow. This yoke is fitted to the yoke-carrier c and to the
locking bar d to slide freely and independently thereof up and down at one time,
and to be locked or fixed thereto at another by a twisting or part-rotating move-
ment of the said looking bar within the hole e, in the yoke through which the
said locking bar passes; the said twisting movement of the locking bar causing
a jamming in the hole e³. The yoke e is, however, practically mounted upon the
yoke carrier c through antifriction rollers 9, 93, 93, the latter of which is adjust-
able. The end of the yoke or cross bar is forked and fits the guide rod a³
in the manner shown in Figs. 2 and 5. The last-named fig. illustrates the yoke e

page_text: free to move on the yoke-carrier and locking bar, and Fig. 6 the same locked
to the said yoke carrier and locking bar.
The movement of the locking bar as aforesaid to lock and unlock the yoke or
cross bar to and from the yoke-carrier is brought about automatically from the
cores h,'i, of the electro magnets through a lever m, a link n, a rocker bar o, and
an adjustable stop! s, the first-named jointed at m³, to the yoke-carrier c, the third
named coupling the coresh and i, the second-named connecting the lever, mito
the rocker bar o,, and the last-named adjustably fitted to the guide rod a³. The
lever m has a short arm m³ projecting from its side, which engages fork-like
the roller d³ of the stud d upon the locking bar d, and one of its ends m³ so
projects as to extend over the adjustable stop s.
In the are lamp shown the negative carbon electrode is a fixture, the one f
herein before described being only fed, and this is loosely suspended by its socket
from the yoke e.
As before described the positions of the parts of the mechanism according to
the first part of the invention are shown in the drawings with the arc between the
carbons struck, during which time the yoke e is locked to the yoke-carrier by.
the twisting of the locking bar d; the lever m being in a position shown in
Fig. 1 and the stud d in the position shown in Fig. 4. As the positive carbon f
burns away it is dropped gradually by the lowering of the yoke carrier with the
yoke locked to it through the shunting of the current from the series solenoid
and the consequent rocking of the bar o, until such time as the said yoke-carrier
has travelled down sufficiently to cause the end m of the lever m to rest upon
the stop, s, when the slightest further movement down of the said yoke-carrier
causes a tipping of the lever m, a twisting of the locking bar d, and a momen-
tarily release of the yoke from the locking bar, which said yoke, falls, and feeds
forward the carbon electrode f. The feeding, as aforesaid, returns the current
to the series solenoid and the arc is struck by bodily lifting the yoke-carrier and
yoke from the lever m and the twisting movement of the rocking bar.
The negative carbon electrodė may be connected with the positive carlion
holder by suspension over a pulley in the case of an arc lamp of the open type.
From Figs. 5 and 6 it will be seen that the section of the locking bar and
the shape of the hole it engages is elliptical, but any section and any shape
which will, by a part rotating or twisting movement of the locking bar, cause
a jamming between the said looking bar and the yoke, or act as a clutch between
these two parts, can be used.
!
According to the second part of this invention the globe or are chamber enclos-
ing the carbon's points is a glass bulb or cylinder closed at bottom and open
at top, the said top having formed upon it.an outwardly extending. ring-flange
which is adapted to bed onto an asbestos or other suitable seating on the under-
side of the lamp's frame. The closed bottom of the glass bulb or cylinder is all
glass, and there is nothing on the underside of the globe to cast shadows.
To attach the globe or are chamber to the frame of the lamp, pivot buttons
carried upon short spring-actuated rods are fixed to the lamp's frame so as to
engage the ring flange of the globe underneath, and exert a clamping action of
the said flange onto the asbestos seating.
Having now particularly described and ascertained the nature of our sáid
invention, and' in what manner the same is to be performed, we declare that what
we claim is:-
First. A carbon feeding and controlling mechanism for are lamps, distinguished
by a locking bar or rod or its equivalent upon which slides a falling weighted
yoke or carrier coupled to the carbon electrodes, the said locking, bar having
imparted to it from the solenoids and from an adjustable stop a part-rotating or
twisting movement to lock and unlock the said yoke to it and a lifting move-
ment to move the yoke and strike the arc, substantially as described.
Second. A carbon feeding and controlling mechanism for aro lamps comprising

page_text: a yoke carrier capable of a small movement on the guide rod disposed' between
the head and bed plates, a part rotating locking bar or rod pivoted parallel with
said yoke carrier, a weighted yoke or cross bar to which are connected the carbon
electrodes, or one of them, and which can slide up and down upon said yoke-
carrier and looking bar, and which has a hole within it through which the said
locking bar can pass and within which the said locking bar jams, a lever m ful-
crummed to said yoke-carrior and connected to the solenoids and to the locking
bar, and an adjustable stop acting as a tipping medium to the lever m, substan-
tially as described and set forth.
Third. In arc lamps, a carbon feeding and controlling mechanism constructed
and having its parts arranged to operate and move in combination, substantially
as described and set forth in the drawings.
Fourth. In enolosed aro lamps, forming the globe or arc chamber enclosing the
carbon's points like a glass bulb or cylinder closed at bottom and open at its top,
the said bottom being all transparent glass, for the purpose substantially as
described.
Fifth. In enclosed arc lamps, connecting the globe to the underside of the
lamps' frame by a ring-flange on the globe and an asbestos or similar seating on
the lamp's frame, and pivot buttons which exert a clamping action of the ring
flange onto the seating, substantially as described.
Dated Vitay pin
W. P. THOMPSON & Co., .
11, Burlington Chambers, New Street, Birmingham,
Also at Liverpool, London, and Manchester.
Patent Agents for the Applicants.