Improvements in Arc Lamps.
Year: 1893

page_text: Date of Application, 7th June, 1893
Complete Specification Left, 7th Mar., 1894-Accepted, 7th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Arc Lamps.
I, BEN DEATH 9 Rye Street Southsea Hants Inventor do hereby declare the
nature of this invention to be as follows:-
This invention relates to arc lamps the object being to provide a lamp with two
or more rods having racks and carrying the carbons which are alternately auto-
matically brought into operation through the action of the racked rods acting upon
a train of clock work mechanism. I provide a frame carrying the clock work.
This frame slides upon suitable pillars connected to a top and bottom plate, and is
adjustably supported by two levers pivoted to the top plate and attached to a
spring passing through a solenoid and adjusted by a thumb screw and plate. For
purposes of illustration I will describe a lamp provided with three rack rods and
carbons. The rack rods carrying the carbons pass through the upper and lower
plates and are provided with racks engaging with toothed wheels. These toothed
wheels are connected to the train of wheels through the medium of a pawl and
ratchet. The rack rods are provided with stop pieces or projections which engage
with levers which operate the brake rings encircling the rods carrying the carbons.
The frame carrying the clock work is operated by an iron core by means of which
it is raised or allowed to fall by the action of a shunt wound solenoid. A brake
is provided which is operated through a lever by an iron core regulated by a
spring and thumb screw and solenoid the said core being controlled by a spring.
The brake is provided with two or more spring counterpoises attached to same
which regulate the speed of same. A movable guard is provided which partially
encircles the said brake wheel.
The action is as follows:-
When the initial or first rack rod has fed right down, the stop piece on same
releases the friction ring through the medium of levers from holding the second
rack which feeds down until its limit is reached, when, through the action of a
stop carried by same it releases the third rack through the medium of a lever and
friction ring and allows it in turn to feed down. The racks carrying the carbon
The solenoid
form the positive pole, a suitable negative pole being provided.
regulating the frame carrying the gear wheels is shunt wound, the shunt on same
being connected in series with the shunt regulating the feed brake this shunt
being connected in parallel with the lamp circuit. When the current passes the
frame and rack rods are drawn up and the arc established.
Dated this 7th day of June 1893.
E. EATON,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Arc Lamps.
I, BEN DEATH 9 Rye Street Southsea Hants Inventor 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 relates to. arc lamps the object being to provide a lamp with
two or more rods having racks, and carrying the carbons which are alternately
071

page_text: automatically brought into operation through the action of the racked rods acting
upon a train of clockwork mechanism.
In order that my invention may be fully understood, I now refer to the annexed
drawings in which :-
Figure 1 is a side elevation of a lamp constructed according to my invention.
Figure 2 plan view through line x-y in Figure 1.
Figure 3. elevation of levers supporting frame.
I provide a frame a having three projecting arms b which slide upon rods c which
connect the upper & lower plates e & e'. The lower part of the frame a has
three similar projecting arms & sliding on the rods c. This frame a carries the
clockwork or train of wheels to be hereinafter more fully described. The rack
rods d, d¹ & d² carrying the carbous pass through the upper & lower plates e & e¹
& are provided with racks f, engaging on the toothed wheels g. These toothed
wheels g are connected to the train of wheels through the medium of a pawl h
engaging on the wheel i or ratchet.
j
The rack rods d have stop pieces which engage on the ends of the lever 1,
pivoted at which bring the rings into a position so as to let the rack rods d
move downwards the rings k when in their lower position gripping the rods d and
acting as a friction grip. The frame a is attached to two levers m & m which are
pivoted at o to the piece or supports o² attached to the upper plate e Figure 3, and
the ends of the levers m are attached to the screw rod p at o which is connected
to the armature 2 which passes through and works within the core q, & is connected
by the spring' to the rod r, & thumb screw s, which bears on the top of the core
or solenoid y, so that the weight of the frame carrying the wheels engaging on the
rack rods d may be readily adjusted. t is a lever pivoted at u to the top of the
solenoid v, one end of which carries the core w, the other end acting on the brake a,
pivoted at to the frame a. This brake pivoted at y acts upon the wheel z, which
gears into the train of wheels upon which the rods d act. This brake block is
released from the wheel by means of the pivoted levert attached to the armature wo
working in the solenoid v.
2
1 is the negative pole or connection to which the carbons are attached. By
this means it will be seen that upon the current passing the rod d will descend
until the circuit will be closed when the solenoid 7 will through the action of the
core r raise the frame a & thus establish the arc between the carbons, when the
arc is broken or the passage of the current is interrupted owing to the consumption
of the carbons the current is shunted into the solenoid v which thus releases the
brake & allows the carbons to again approach one another & thus the arc is
again established the resistance of the solenoid v being greater than the arc.
When the carbon in the one rod has been consumed the stop piece j coming into
contact with the lever pivoted at to the bottom plate e¹, causes the ring to
assume a position to allow the rod d¹ to descend & so on, each rod upon its descent
causing the stop piece thereon to act upon the levers so as to release same, as the
carbon is consumed.
When the lamp is started the current passes through the smaller solenoid v
until the carbons meet when owing to the resistance to the passage of the current
being greater in the small solenoid the current passes through the carbons and
also through the solenoid g which by the action of the core r raises the clockwork
frame & with it the carbon rod attached to one of the racks as the brake & prevents
the wheels from rotating. As long as the arc is established, the solenoid is in
operation. The solenoid q is in series with the circuit of the current when passing
through the arc, or carbons, whereas the solenoid is arranged in parallel circuit
therewith or as a shunt, so that when the passage of the current is interrupted in
the solenoid & lamp circuit, the whole or part of it is shunted through the
solenoid which then releases the brake & the rack carrying the carbon descends,
the current again passes through the arc & solenoid q, owing to the less résistance
offered; and so on. The connections of the solenoid v are as follows; the two
terminals of the windings are connected to the terminals B, B', through which the

page_text: current enters, one end of the winding of the solenoid q is also connected to
terminal B by line wire C, the other terminal of the winding being connected to
the carbons by line wire D & from the negative rod 1 back to the terminal B' by
the wire E.
The rings K being carried by the rod or lever / pivoted at will when raised
or lowered move in an arc of a circle and thus when in the lower position grip the
rack rod, more tightly the more the ring is lowered and when the ring k is raised
the gripping edge of same which is pressing on the rack will move away from
the rack & so allow same to fall, or descend through the aperture in the ring.
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. The combined construction and arrangement of the various parts substantially
as described.
2. In arc lamps of the class herein described a frame supported by levers &
controlled by an electro magnet carrying a train of wheels controlled by a brake
in communication with & operated by an electro magnet, one or more racks engaging
with and operating said train of wheels through the medium of a pawl and ratchet,
said racks being attached to or forming part of the rods carrying the carbons &
having stop pieces which engage on levers connected to friction rings which
encircle said rods for controlling the movement of same, a central carbon supporter
on which the carbons aforesaid engage. All in combination and substantially as
described.
Dated this 7th day of March 1894