Regulator for Dynamo Machines.
Year: 1896

page_text: Date of Application, 24th July, 1896-Accepted, 19th Sept., 1896
COMPLETE SPECIFICATION.
Regulator for Dynamo Machines.
We, ANTON HEUSCH of 45, Mauerstrasse Berlin, in the Empire of Germany,
Gentleman and PAUL BRANDT of 1 Holmenstrasse, Berlin in the Empire of
Germany, Engineer 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 a regulator which acts to include or to cut out resistance
into and from the field magnet circuit in the case of variations of the current, the
arrangement being such that a differential coil moves a rotary arm whereby a
current is caused to pass in one or in the other direction into a motor that is
adapted to act upon a switch arm, and thereby causes the motor to rotate in a
right hand or in a left hand direction.
The accompanying drawings illustrate diagrammatically one method of carrying
this invention into practice.
The dynamo machine D supplies a working circuit in which are lamps are
assumed to be included. An iron plate a constructed in the form of an armature
and capable of rotating about an axle b, is situated between the four coils N N
and H H constructed and connected according to the differential system. H H are
main circuit coils wound with coarse wire, and N N are the shunt coils wound
with fine wire, which are connected with the current circuit and amongst each
other after the manner of the coils of a differential arc lamp in the manner
well-known.
Two springs c c serve to hold the iron plate a between the cores of the coils NH
in such a manner that the said plate does not come in contact with the parts of
the latter. This iron plate has insulated ends which carry contact pieces d d
and d d.
According as the potential in the main current circuit increases or decreases,
either the coils N or H will come into operation, and the iron plate a will be set
obliquely towards the left or towards the right hand causing one or other of the
contact pieces dd' to come in contact with the corresponding contact pieces e e¹
and supply the current in one or other direction to the motor M. The motor will
consequently rotate in a right band or left hand direction, and by means of the
switch arms through the medium of a gear t, the motor will include a resistance
into or cut it out of the circuit and will thus regulate the potential.
When the plate d is attracted by the coils N, the following is the path of the
current :-
From the machine D through the conductor 1, 2, 3, to the contacts de into the
conductor 5, 6, 7, 8, 9, to the armature of the motor M. When the current leaves
this motor at the field magnets, the current flows through the conductor 10, 11, 12,
to the upper contact e d, and, after flowing through the conductor 13, 14, 15, 16
returns lack to the dynamo machine D.
As the shunt coils N came into operation, the potential was too small and must
therefore be increased. The motor M will now rotate in such a direction that the
switch arms cuts out the resistance, and thus the potential in the main current
circuit is increased.
If the potential in the main circuit should exceed a certain limit, the plate a is
attracted by the coils H, and contact is made at d'e'. The path of the current is
then as follows:-
From the dynamo machine D through the conductor 1, 2, 3, to the contact d'e

page_text: through the conductor 17, 18, 19, 20, and thence into the field magnet winding
of the motor M, which is now rotated in the reverse direction, and acts by means of
the switch arms to include the resistance into the circuit. On leaving the motor M,
the current flows further through the conductor 21, 22, 23, contact el di
conductor 24, 25, 26, and back to the dynamo machine D.
By using the differential-coil-connection the regulation is rendered extremely
sensitive, and the current of the main circuit can therefore be maintained at an
extremely constant potential.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
A regulator for dynamo machines, the construction being such that on the
occurrence of variations in the potential in the main circuit, a rotary contact
arm d is moved by means of a differential coil system H N whereby current is
sent into a motor M in one or the other direction, thus moving a switch arm & so
as to include resistance into the field magnet circuit or cut it out therefrom
according to requirements, as set forth.
Dated this 24th day of Jul 1906
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.