Year: 1887

page_text: Date of Application, 21st Sept., 1887
Complete Specification Left, 20th June, 1888
Complete Specification Accepted, 7th Sept., 1888
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake and Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
The object of this invention is to equalize the irregularity in the attraction of the
solenoid acting upon its core which has heretofore been effected by means of the
so-called Kriczik and Piette's solenoid cores varying in quantity in the direction of its
length in inverse proportion to the attraction of the solenoid, and it comprises the
employment of a considerable number of solenoids, arranged co-axially to one another
in combination with but one conjoint core of equal quantity throughout in the direction
of its length.
Amongst the great number of cases in which this invention may be employed, with
advantage it is only necessary to take one instance as an illustration, viz., as a regu-
lating device of an electric arc-lamp.
The common core carrying the upper carbon is kept suspended inside the solenoids
arranged co-axially one above the other and it will descend according to the combustion
of the carbon. As the solenoids are included in the circuit of the carbons or at
least in a shunt of a circuit, the distance between the two carbon points will be
exactly regulated according to the varying resistances, that appear when the voltaic-arc
is formed

page_text: This effect seems to result from the fact, that the irregularities of the movement,
produced in the conjoint core by the attraction of a single solenoid, are at least
partly compensated by the other solenoids acting in an opposite direction and will
at last fully disappear by the co-action of the increased number of solenoids upon
the one conjoint core.
Although this invention has been described as employed in combination with an
electric arc-lamp, it should be understood, that it is intended to be employed as a new
electrical regulating device for any other suitable purpose.
01
1002
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: for other Purposes.
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co., Patent
Agents, Southampton Buildings in the County of Middlesex do hereby declare the
nature of the said invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
-:
The object of this invention is to equalize the irregularity in the attraction exerted
by a solenoid upon its core, which has heretofore been effected by means of so called
"Kriezik" and "Piettes" solenoid cores varying in quantity in the direction of its
length in inverse proportion to the attraction of the solenoid and it comprises the
employment of a considerable number of solenoids coaxially arranged and separated
from each other by indifferent layers, in combination with but one conjoint
core of throughout equal quantity in the direction of its length.
Amongst the great number of cases in which this invention may be employed with
advantage it is only necessary to take one example as an illustration of the invention,
viz., the regulating device of anti-electric arc lamp.
In the accompanying drawing
Figure 1 is a side elevation of the lamp.
Figure 2 a special mechanism for preventing the vibrating motion of the carbon.
Figure 3 another detail; and
Figure 4 a section at the line x, x.
Similar letters refer to similar parts throughout the different views.
The common core connected to the socket c for the reception of the upper carbon,
is kept pending inside the solenoids s arranged co-axially one above the other and
supported by the frames and e, e¹, e² and columns d. The frame f carrying the
ring g for suspension of the lamp is provided with the terminals h and i both insulated
from it by means of rubber washers. The terminal h for the anode e is connected
with the wire of the solenoids so that the positive electric current is conducted from
the terminal to the solenoids s, the screw & attached to one of the columns d,
the screw, the flexible wire n, the screw m, the socket e and the upper positive
carbon b.
C
From the negative terminal i a wire o passes through the frame e, from which it is
insulated by means of a rubber tube, to a screw o' of a bracket p carrying at one end
the disc e insulated from the disc e¹ by means of a rubber plate q, and on the under
end the tube p for the reception of the negative carbon r. This carbon is raised by
the action of a spring and arrested at a determined height by means of a platina
point
三
**
The tube p is not connected directly to the bracket but to a movable carbon
holder pivoted at a and having a notch wherein the screw is guided. This has
been constructed for the purpose of facilitating the removal of the carbon rods in case
of renewal, as the lower carbon holder is admitted to be turned aside, whereby the

page_text: re-occupation of the exact position of the lower carbon is secured by means of the
set-screw bearing against the screw =³.
In order to obviate the horizontal and vertical vibrations of the core when the
electric current is conducted through the windings of the solenoids, the arm-cross w
guided between the columns of the electric are lamp, and a mechanical brake con-
sisting of a vertical cylinder t preferably filled with glycerine or mercury and a
piston ¹are connected with the core a or the holder c for the upper carbon. For this
purpose the bow-shaped rod u, one arm having finely annular rips or threads and is
guided by the discs e, e', e² of the frame, is connected with the said piston 1, while
the arm provided with the thread serves to form the connection with the vertically
descending core in such a manner, that the latter is prevented to accidentally raise
while the electric arc is formed between the carbon points. This will be effected by
means of the inclined clicks v joined to one arm of the cross-head w and engaging
with the annular rips or the thread of the rod passing the respective arm of the
cross-head w.
The core pending inside the solenoids will descend by means of this arrangement
according to the varying resistances that appear when the voltaie are is formed.
This effect seems to be the result of the fact, that the different solenoids being
separated from each other, act each one as a single solenoid tending to raise the core
to its middle, so that the irregularities of the movement produced by one or more of
the solenoids are almost entirely compensated by the other solenoids acting in an
opposite direction so that the co-action of the increased number of solenoids upon the
one conjoint core will disappear.
It will be clearly understood that although this invention has been described as
employed in combination with an electric arc lamp that it may also be employed as a
new electrical regulating device for any other suitable purpose.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed as communicated to me by
my foreign correspondent I declare that what I claim is :-
:-
First. The combination, in an electric regulating device of two or more solenoids
co-axially arranged and separated from each other by indifferent layers, with a core of
throughout equal quantity, substantially as and for the purpose specified.
Second. In an electric are lamp employing two or more solenoids in the manner
and for the purpose specified the combination of the solenoid core or the upper carbon
holder, with the cross head w clicks vengaging into the threaded or indented bow-
shaped rod u one arm of which is connected to a piston t' and the cylinder t enclosing
a liquid substance forming a brake to meet the vibration of the core when the voltaic
are is formed.