Improvements in the Arc Striking and Feeding Devices and Arc Lamp Frames for Arc Lamps, more especially applicable to those Arc Lamps Used Singly, or Two or More in Series across Incandescent or Constant Potential Mains.
Year: 1895

page_text: Date of Application, 30th May, 1895
Complete Specification Left, 27th Feb., 1896-Accepted, 4th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Arc Striking and Feeding Devices and Arc
Lamp Frames for Arc Lamps, more especially applicable to
those Arc Lamps Used Singly, or Two or More in Series across
Incandescent or Constant Potential Mains.
FREDERICK D'ARTREY GOOLD South Western Hotel Woking Surrey do
hereby declare the nature of this invention to be as follows:→
To establish the arc I use a high resistance fine wire coil (instead of the usual
thick wire coil) and which I connect directly across the mains. Where two or
more lamps are used I connect all the fine wire striking coils in series with one
another and then across the mains. To feed the carbons together there is a lever
and projecting pin engaging with an escapement click upon a train of wheels which
in its normal position prevents them revolving, a high resistance coil in shunt
across the arc becoming energised by the lengthening of the arc, draws up a core
or armature to which the above lever is attached thus drawing it away from the
escapement click and allowing train of wheels to revolve and feed down carbons.
As above shunt coil circuit is made through lever pin and escapement click the
circuit is broken at the instant of each feed and instantly remade thus allowing of
a very fine feed being given. Or in place of projecting pin and click I may use a
flat spring moving with the lever from an adjusting screw and through which the
circuit is made and broken at the instant it is drawn away and the feed takes place.
The lamp frame consists of two rods two plates and a bottom connecting piece.
The top plate and bottom connecting piece have holes a certain distance apart
for the reception of the rods, whilst the bottom plate has holes slightly closer together.
The two rods have an eccentric slot in each the depth ot the difference of the
distance apart between bottom plate holes and those in top plate and bottom
connecting piece. When bottom plate is in place it bears on the rod slots and two
pieces of tube (the length that the top and bottom plates are to be kept apart) with
eccentric tongues on end are then slipped over the rods the tongues fitting into the
space left open in the bottom plate holes. When the nuts are screwed on top and
bottom of rods a firm rigid and cheap frame is the result.
Dated this Twenty-ninth day of May 1895.
FREDERICK D'ARTREY GOOLD.
COMPLETE SPECIFICATION.
Improvements in the Arc Striking and Feeding Devices and Arc
Lamp Frames for Arc Lamps, more especially applicable to
those Arc Lamps Used Singly, or Two or More in Series across
Incandescent or Constant Potential Mains.
I, FREDERICK D'ARTREY GOOLD, late of South Western Hotel, Woking,
Surrey, now of 36 Orange Street, Brooklyn, County of Kings, State of New
York, U.S.A., Electrician, 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 aud by the following statement:—
This invention relates to arc establishing and feeding devices for arc lamps, and
to the construction of the arc lamp frame, the object being-to-simplify, improve,
[Price dl

page_text: and cheapen arc lamps. The arc establishing and carbon feeding devices to be
described are well adapted for use on constant potential circuits.
In the drawing
Fig. 1 is a side view of the lamp ;
Fig. 2 is a section on line 2-2; and
Fig. 3 is a diagram of circuit connections.
For the arc establishing magnet a fine wire, high resistance coil, a, is used, either
connected directly across the mains, b, b', or, when several lamps are in series,
connecting these coils in series across the mains. This coil has an armature, b,
connected to frame c, pivoted at d to posts e.
Said frame carries a train of
wheels, f, with an escapement, g, from which projects a detent, h. i is a pulley
secured to the main wheel of the train, and around it is wound a light chain or
other flexible strand, the ends of which are connected respectively to the upper
and lower carbon carriers, k, l. m is a weight which furnishes power to feed the lamp.
To control the feeding of the carbons another coil, n, of high resistance is
connected in shunt to the arc, and its armature, o, is connected to angle lever p
pivoted at 9, and carrying a projecting pin, r, adapted to normally engage and
hold detent at rest, and to be moved back out of engagement. Pin and
detent are suitably insulated from the lamp mechanism, and the shunt circuit,
including coil n, passes through them.
The lamp circuits are shown in Fig. 3. The mains b, b', are connected to the
lower and upper carbons, and coils a, n, are connected as already described.
C
When the circuit to the lamp is first closed, a attracts its armature, slightly
tilting frame and its train of gears; this, through chain j, separates the carbons
starting the arc. As the arc lengthens coil n attracts its armature, carrying
pin back, releasing the detent, thus allowing the carbous to feed toward each
other, and at the same time breaking the shunt circuit through h, r, so that coil n
is at once de-energized and pin » moves back under the detent. The form of this
circuit breaker for the shunt can be varied to some extent without departing from
.he invention.
The lamp frame consists of two rods s, two metal plates, t, t¹, and a bottom
connecting piece u. The top plate and the bottom piece have holes, v, as far apart
as the rods are to be in the completed frame, while the lower plate has holes v²,
slightly nearer together. The two rods cach have an eccentric slot, w, extending
partly around it and at its deepest part, which is on the outer side of each rod, has
the depth of the difference of distance apart between the holes and v¹. This
causes the plate to enter said slots, when the parts are put together, so that t¹ is
firmly supported. On the rods between the plates are tubes x, having at their
lower ends tongues y adapted to enter the spaces between the rods on their inner
sides and the corresponding sides of holes v. Four nuts z hold the entire frame
together.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A lamp with a high resistance arc striking coil connected across the mains,
and the devices moved thereby to separate the carbons.
2. A lamp with a high resistance arc striking coil connected across the mains,
and the devices moved thereby to separate the carbons, a high resistance shunt
coil operating to release the feeding devices and to break the shunt circuit, through
the escapement detent.
3. The lamp frame having rods with grooves w, plates t, t¹, with holes as
described, tubes x, and means for holding the parts together.
Dated this 17th day of February 1896.