A Method of Converting or Transforming Periodic Electric Currents to Obtain Constant Effective Intensity or Voltage.
Year: 1891

page_text: Date of Application, 5th May, 1891
Complete Specification Left, 1st Feb., 1992-Accepted, 4th June, 1892
PROVISIONAL SPECIFICATION.
A Method of Converting or Transforming Periodic Electric Currents
to Obtain Constant Effective Intensity or Voltage.
1 PAUL BOUCHEROT of 31 Boulevard Henri IV. Paris in the Republic of
France Electrician do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to obtain a current of which the intensity is
constant where a periodic electromotive force of a constant effective average value
is given, or in other words where a constant effective difference of potential is
maintained between two poles.
A second object of the invention is vice versa to obtain a constant effective
difference of potential where a current of constant effective intensity is given.
The first object is attained by inserting in series between the poles where the
constant effective difference of potential is obtained any apparatus possessing the
quality of electrical capacity of a suitable value, and another apparatus possessing
the quality of self induction also in a suitable degree.
Then from the two terminals of either the capacity apparatus or the self induction
apparatus there may be taken in shunt a second circuit and the effective intensity
of this second circuit will be constant whatever may be the apparatus included in
this circuit whether incandescent or arc lamps, resistances, self induction coils,
condensers, motors, transformer or other apparatus.
To fulfil the second object the capacity apparatus is placed in the circuit where
the constant effective periodic intensity exists and the one pole of the self induction
apparatus is connected to the one pole of the capacity apparatus or the self
induction apparatus may be inserted in the circuit and the one pole of the capacity
apparatus connected to the one pole of the self induction apparatus, in either case
a constant effective difference of potential will then be found to exist between
the other pole of the capacity and the corresponding pole of the self induction
apparatus.
In applying the invention any device or apparatus capable of electrical capacity
or of self induction may be used provided its valve for its respective purpose
is sufficient looking to the known value of intensity or of electromotive force in
question.
The best relation to be observed is the following
Thus if I is the constant intensity in amperes E the constant difference of
potential in volts and T-the periodic time of the current in seconds, C the value of
the electro-static capacity in farads is found by the equation
IT
C:
E2T
and the value of the coefficient of self induction indicated by L is found in
quadrants or sec-ohms by the equation
ET
L =
Τ2 π.
7 being in each case the proportion of the circumference of a circle to its
O diameter or about 3.1416.
Dated thin 5th 1
M
1001

page_text: COMPLETE SPECIFICATION.
A Method of Converting or Transforming Periodic Electric Currents
to Obtain Constant Effective Intensity or Voltage.
I PAUL BOUCHEROT of 31 Boulevard Henri IV. Paris in the Republic of
France Electrician 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 :-
The object of this invention is to obtain a current of which the intensity is
constant where a periodic electromotive force of a constant effective average value
is given or in other words where a constant effective difference of potential is
maintained between two poles.
A second object of the invention is vice versa to obtain a constant effective
difference of potential where a current of constant effective intensity is given.
The first object is attained by inserting in series between the poles where the
constant effective difference of potential is obtained any apparatus possessing the
quality of electrical capacity of a suitable value and another apparatus possessing
the quality of self induction also in a suitable degree.
Then from the two terminals of either the capacity apparatus or the self induction
apparatus there may be taken in shunt a second circuit and the effective intensity
of this second circuit will be constant whatever may be the apparatus included in
this circuit whether incandescent or arc lamps, resistances, self induction coils,
condensers, motors transformer or other apparatus.
To fulfil the second object the capacity apparatus is placed in the circuit where
the constant effective periodic intensity exists and the one pole of the self induction
apparatus is connected to the one pole of the capacity apparatus, or the self
induction apparatus may be inserted in the circuit and the one pole of the capacity
apparatus connected to the one pole of the self induction apparatus, in either case
a constant effective difference of potential will then be found to exist between the
other pole of the capacity and the corresponding pole of the self induction
apparatus.
In applying the invention any device or apparatus capable of electrical capacity
or of self induction may be used provided its value for its respective purpose
is sufficient looking to the known value of intensity or of electromotive force in
question.
The best relation to be observed is the following.
Thus if I is the constant intensity in amperes, E the constant difference of
potential in volts and T the periodic time of the current in seconds, C the value of
the electro-static capacity in farads is found by the equation
The accompanying diagrams illustrate the relative arrangements of the apparatus
herein described.
L represents an apparatus of self induction, C one of capacity; between e e
there exists the constant effective difference of potential, between the constant 45
effective intensity of current.

page_text: In Fig. 1 the intensity is found in a circuit in shunt with the capacity.
In Fig. 2 it is found in a circuit in shunt with the self induction.
In Fig. 3 the constant effective difference of potential is found between the one
terminal of the self induction and the one terminal of the capacity.
In Fig. 4 it is found between the other terminals of these two apparatus.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The method of obtaining a current of constant effective intensity from a
periodic electric current of constant effective electromotive force consisting in
combining in series in the circuit of constant electro motive force, an apparatus
possessing electrical capacity and one possessing the quality of self induction and
connecting the circuit in which the constant effective intensity is required in shunt
with either of these two apparatus.
2. The method of obtaining a constant effective difference of potential where a
current of constant effective intensity is given consisting in combining in shunt in
the circuit in which the current of constant effective intensity is given an apparatus
possessing electrical capacity and one having the quality of self induction, whereby
the constant difference of potential will be found between the one or other pair of
adjacent terminals of these two apparatus.
Dated this 1st day of February 1892
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.