Improvements in and relating to Electric Regulators.
Year: 1895

page_text: Date of Application, 15th July, 1895-Accepted, 17th Aug., 1895
COMPLETE SPECIFICATION.
Improvements in and relating to Electric Regulators.
I, WILLIAM VERNON BONSOR, of 126 Gladstone Road, Wimbledon, in the
County of Surrey, Electrical Engineer, do hereby declare the nature of this
invention and in what manner the same to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention consists of a new and improved method of regulating and
controlling the current and voltage in circuits subject to variable resistances, by a
device of simple form which does not consist of complicated mechanism, and which
is extremely sensitive and reliable in its controlling action.
For this purpose I employ an electric motor, the armature of which has two
distinct circuit windings suitably proportioned. These two circuits are connected
separately to distinct commutators. The one armature circuit is connected in
series with the circuit to be controlled or regulated, in such a manner that the
whole or part of the main current will traverse it according to the application.
The other armature circuit is in shunt across the circuit to be controlled. The
series and shunt windings of the armature are each divided into an equal number
of sections disposed around the single armature core used, so that they alternate
with one another; and this complete differential armature is so constructed and
arranged, that the mechanical forces are in opposition. The series winding having
a tendency to rotate the armature in one direction, and the shunt winding in the
opposite direction, the resultant force, when present, is utilised to move such
suitable controlling apparatus as will restore a condition of equilibrium.
The field magnet or magnets may be shunt or series wound, or both, according
to the application and purpose required.
As my invention is particularly applicable to control and regulate the current in
electric arc-lamps, I have in the following paragraphs described and illustrated
how this may be carried out in practice.
Referring to the accompanying drawing-Figures 1 and 2, are two elevations at
right angles to each other, shewing part of an electric are lamp frame, with my
improved regulator attached; in which similar letters of reference are used to
indicate like parts in both views.
B is the main base plate of the framework which framework may be of any
suitable and convenient construction, but preferably of the type which enables
both carbons to move simultaneously. To this base plate the regulator is firmly
attached.
P and P represent the pole pieces.
M is the field magnet core.
A is the armature core.
C and C independent commutators.
D, D and D2, D3 their respective brushes and holders.
S armature spindle.
E guide roller for chain.
I toothed wheel, gearing in chain, driven by a chain of wheels from spindle S.
F chain giving motion to carbons. Cord or the like may be substituted for

page_text: higher than normal, and therefore sufficient to magnetise the field, and activate the
armature in the required direction to bring the carbons together, at which moment
the series circuit being closed by contact of the carbons a more powerful magnetic
field will-result, with simultaneous activity. of the series sections of the armature
causing it to revolve in opposite direction to that caused by the shunt, but only so
far as is necessary to strike the arc-the length of arc being determined by
the relative winding of the opposing sections of the armature core. This result
being obtained, the forces in each armature circuit are balanced and it remains
stationary until the resistance of arc increases, when the shunt energy will once
more predonderate and cause the armature to move sufficiently to restore the
balance. This action will repeat_as_required,-keeping the arc its proper length
with no danger of carbons over feeding without means of recovery; so frequently
the cause of arc lamps burning dull.
Although I have thus particularly described the application of my.regulator to
the purposes of an arc lamp only, it will be obvious that the same action can,
by any well known and suitable intermediate mechanical. or electrical agency, be
applied generally to purposes of regulation or control, such as moving valves,
controlling motive power, moving switches, altering number of accumulator cells or
resistance in circuit and the like, without in any way departing from the nature of
my invention.
Having now particularly described, and ascertained the nature of the said inven-
tion, and in what, manner the same is to be performed, I declare that what I
claim is
First. An electric regulator in which necessary rotatory motion in either
direction is derived from an electric motor having only one armature core, wound
with two opposing circuits, one in series the other in shunt across the circuit to be
controlled, which circuits are so arranged and proportioned that, when the current
'in the circuit to which the regulator is applied is in normal condition, the two
forces in the armature neutralise each other leaving the armature stationary, and,
when any deviation from this condition arises, causes the armature to rotate in
whichever direction is necessary to bring it back to its normal condition.
Substantially as described above."
Second. 'In an electric arc lamp the improved electric regulator. Substantially
as shewn and described above.
Third. The improved electric regulator for purposes of general distribution or
control. Substantially as described.
Dated this Fifteenth day of July 1895.
WILLIAM VERNON, BONSOR,
Applicant.