Continuous Currents of Electricity for Charging Electrical Accumulators.
Year: 1888

page_text: Date of Application, 28th June, 1888
Complete Specification Left, 28th Mar., 1889
Complete Specification Accepted, 4th May, 1889
Continuous Currents of Electricity for Charging Electrical
Accumulators.
I, REGINALD FREDERICK YORKE Electrical Engineer, Cecil House Redhill, Surrey,
do hereby declare the nature of this invention to be as follows:-
Since it is impossible to charge electrical accumulators directly by means of
alternating currents of electricity it becomes necessary to introduce some method of
doing it indirectly.
I carry out my invention in the following manner.
An electrical inotor capable of being worked by alternating currents of electricity
is fixed so as to drive an ordinary continuous current dynamo. This may be done
either by means of a belt or preferably by coupling the two machines together so that
the moving portions of each machine may revolve on the same shaft.
When the alternating motor is working, a continuous current will then be produced
by the dynamo, & this current may be employed either for charging accumulators
alone, or for charging accumulators & lighting electric lamps at the same time.
The field magnets of the motor may be excited by current obtained from the
accumulators. If the motor be not self-starting it may be made to move by passing
current from the accumulators through the continuous current dynumo which will then
act as a motor.
When sufficient speed has been attained & the current produced in the alternating
motor is in synchronism with the current produced in the external circuit, as shewn
by any suitable test, then the external current may be switched on to the motor which
will then drive the dynamo & so charge the accumulators.
1300

page_text: COMPLETE SPECIFICATION.
A Method and Apparatus for Transforming Alternating into
Continuous Currents of Electricity for Charging Electrical
Accumulators.
1, REGINALD FREDERICK YORKE late of Cecil House, Redhill, County of Surrey,
but now of 11 Kirkstall Road, Streatham Hill, in the County of Surrey, 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:-
My invention relates to the charging of accumulators from an alternating current of
electricity and as it is impossible to effect this directly by such an alternating current
of electricity my invention has for its object the introduction of a method of trans-
forming such alternating currents into continuous currents by suitable apparatus
hereinafter described.
I carry out my invention as follows :—
Any electrical motor capable of being operated by alternating currents of electricity
is combined with an ordinary continuous current dynamo so that either may drive the
other. This may be done by means of a bult, or friction, or other gearing, or
preferably by coupling the shafts of the two machines together so that the rotating
portion of each machine is affixed to the same or a connected shaft. The said
alternating motor is placed in the said alternating circuit but so controlled by a switch
that the main current may bo switched on or off from the motor as desired, the field
magnets of the motor being conveniently excited by an electrical current obtained from
the accumulators hereinafter mentioned or from any more convenient source of
continuous current electricity.
When the alternating motor is thus driven by the main alternating current it will
drive the dynamo armaturo fixed on the same shaft with itself or connected with the
motor by a band or gearing.
The dynamo thus driven will produce a continuous current (the field magnets boing
either self-exciting or excited from accumulators) which may be employed for charging
accumulators.
If the alternating current motor be not self-starting it may be made to move by
passing an electrical current from the accumulator through the continuous current
dynamo which will then act as a motor causing the alternating current motor to
revolve at the same speed with itself.
When a sufficiant speed has been attained to produce a given number of alternations
of current in the alternating motor and the current in the motor is in synchronism
with the external current us conveniently shown by any suitable device, then the
external circuit is switched on to the motor which will then continue to run at a
constant speed, and by regulating the resistance in the field magnet circuit of the
dynamo, the requisite continuous current will be obtained for charging the accumulator.

page_text: Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
1st. The method of transformation of an alternating current into a uniform
continuous current for the charging of accumulators or other apparatus by means of
the apparatus or appliances, substantially as herein described.
2nd. The apparatus employed in such a method, namely, the combination of a motor
driven by an alternating current and a generating continuous current dynamo on the
same shaft or connected by a strap or other gearing to effect the charging of
accumulators by a continuous current generated from said alternating current,
substantially as described.
1
1000
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.