Improvements in Electric Meters.
Year: 1888

page_text: Date of Application, 27th Aug.. 1888
Complete Specification Left. 24th May, 1889-Accepted, 6th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in Electric Meters.
I, JULES CAUDERAY, of Paris Avenue Laumière No. 1, in the Republic of France,
Engineer, lo hereby declare the nature of this invention to be as follows:-
:-
This invention has for its object modifications in the electric meter described in my
former Patent No. 13704 of 10th of November 1885.
It is however
These modifications have the effect of simplifying my meter.
constructed on the same principle the present modifications only relating to the means
adopted for conveying to the recorder the movements of the needle of the ampéro
meter and consequently the flow of the current. The way of actuating the ratchet
which works the recorder is modified and the stepped cones on the axis of the clock
movement are replaced by a stepped plate or by a sector fixed at the end of the needle
of the ampere meter.
The annexed drawings show clearly these modifications.
Figure 1 is a plan of the principal parts of the apparatus.
Figure 2 is an elevation showing the positions of the needle E of the ampere meter
of the steps J and of the lever F when no current is passing through the apparatus.
Figure 3 is an elevation of the same parts when a current of amperes is passing.
Figure 4 shows a sector which may be substituted for the steps J for registering
quantities proportional to any intensity.
In these figures A represents an ampere meter of any suitable construction which
by means of the plate of soft iron B and the axis E oscillates the needle E at the end
of which is placed a stepped plate J.
On the axis M. of the clock movement is mounted an eccentric m which at each
revolution imparts through the bowl a to and fro movement of the lever F. This
lever Foscillates about its centre C. It has pivotted to it at one end the pawl f and
ratchet which by means of the ratchet wheel G drives the train of the recorder H
the details of which being of ordinary construction are not shown.
The lever F is balanced by a counterpois f and a spring D constantly tends to
bring it back into contact with the stepped plate J each time it is displaced by the
eccentric m.
The needle E of the ampere meter pivotted at the point carries at its end the
stepped plate J. This plate J serves to limit the travel of the lever F. The more
the needle E is lowered under the influence of the current the greater is the travel of
the lever F and consequently the greater is the number of teeth the ratchet wheel G is
driven.
With the parts in the positions shown in figures 1 and 2 no current is passing
through the apparatus. If a current of one ampere passes the needle E is lowered so
as to bring the step 1 in front of the lover F which oscillates and at each oscillation
drives the ratchet wheel G. one tooth. If two amperes pass through the apparatus the
step 2 limits the travel of the lever F and the ratchet wheel G advances two teeth-
and so on.
At 5 amperes the amplitude of the oscillation of the lever F will be
from F to F figure 3.
As is seen in figure 3 the arrangement of the steppled plate does not allow of the
registration of fractions of an ampere but this can be done by replacing it by a
sector J' (figure 4) and by employing a ratchet wheel G with very fine teeth or even
without teeth.
The form and dimensions of the sector or the stepped plate as well as of the lever F
can be varied according to the capacity of the apparatus.
Dated this 27th dox of August 1888

page_text: COMPLETE SPECIFICATION.
Improvements in Electric Meters.
I, JULES CAUDERAY, of Avenue Laumière No. 1, Paris, in the Republic of France,
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 has for its object modifications in the electric meter described in my
former Patent. No. 13704 of November 1885.
These modifications have the effect of simplifying my meter. It is however
constructed on the same principle the present modifications only relating to the means
adopted for conveying to the recorder the movements of the needle of the ampère
meter and consequently the flow of the current. The way of actuating the ratchet
which works the recorder is modified and the stepped cones on the axis of the clock
movement are replaced by a stepped plate or by a sector fixed at the end of the
needle of the ampère meter.
The drawings left with the provisional specification show clearly these modifications.
Figure 1 is a plan of the principal parts of the apparatus.
Figure 2 is an elevation showing the positions of the needle E of the ampère meter
of the steps and of the lever F when no current is passing through the apparatus.
Figure 3 is an elevation of the same parts when a current of 5 ampères is passing.
Figure 4 shows a sector which may be substituted for the steps J for registering
quantities proportional to any intensity.
In these figures A represents an ampère meter of any suitable construction which
by means of the plate of soft iron B and the axis E oscillates the needle E at the end
of which is placed a stepped plate .J.
On the axis MI of the clock movement is mounted an eccentric m which at each
revolution imparts through the bowl fa to and fro movement of the lever F. This
lever Foscillates about its centre C. It has pivotted to it at one end the pawl and
ratchet which by means of the ratchet wheel G drives the train of the recorder H
the details of which being of ordinary construction are not shown.
The lever Fis balanced by a counterpoise f³ and a spring D constantly tends to
bring it back into contact with the stepped plate J each time it is displaced by the
eccentric m.
The needle E of the ampère meter pivotted at the point O carries at its end the
stepped plate J. This plate serves to limit the travel of the lever F. The more
the needle E is lowered under the influence of the current the greater is the travel of
the lever F and consequently the greater is the number of teeth the ratchet wheel G
is driven.
With the parts in the positions shewn in Figures 1 and 2 no current is passing
through the apparatus. If a current of one ampère passes the needle E is lowered so
as to bring the step 1 in front of the lever F which oscillates and at each oscillation
drives the ratchet wheel G one tooth. If two ampères pass through the apparatus
the step 2 limits the travel of the lever F and the ratchet wheel G advances two teeth
and so on.
At 5 ampères the amplitude of the oscillation of the lever F will be
from F to F figure 3.
As is seen in figure 3 the arrangement of the stepped plate does not allow of the
registration of fractions of an ampère but this can be done. by replacing it by a
sector J, (figure 4) and by employing a ratchet wheel G with very fine teeth or
even without teeth.
The form and dimensions of the sector or the stepped plate as well as of the
lever F can be varied according to the capacity of the apparatus.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In an electric meter the combination with the needle of the ampère meter of a
stepped plate or toothed sector fixed on the end of the needle.

page_text: 2. In an electric meter the combination with the needle of the ampère meter of
an unstepped plate or non-toothed sector fixed on the end of the needle.
3. The combination of this plate or sector with a lever moved to and fro by
clockwork movement.
1
1
CARPMAEL & Co.,
Agents for the Applicant.