Electrical Watt Meter, also applicable as an Ammeter or Voltmeter.
Year: 1890

page_text: Date of Application, 15th Aug., 1890
Complete Specification Left, 14th May, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION
An Electrical Watt Meter, also applicable as an Ammeter or
Voltmeter.
I, ERNEST WILSON of 2 Rose Mount, Church Lane, Charlton in the County
of Kent, Electrical Engineer do hereby declare the nature of this invention to be
as follows:-
In the Specification to my Patent No. 176498 I described an electrical Watt
meter wherein a disc or conc rotated at a speed proportionate to the electro metive'
force of the current by means of an automatic break solenoid or equivalent motor
imparts motion to the indices of a counter through a friction roller which is pressed
against the disc or cone and which is moved nearer to or farther from the centre
by mechanism controlled by an ammeter or electro dynamometer acted upon by
the current.
According to my present invention instead of causing the combined action of the
above mentioned electro motor and ammeter or electro dynamometer to produce a
registration upon a counter, I arrange these parts in combination with a cylinder
covered with paper and rotated by the motor actuated by the current, and with
a pencil or style controlled by the ammeter or electro dynamometer, so that
the pencil or style is made to effect a permanent registration upon the paper
of the cylinder by tracing a line that will represent the watts consumed.
Fig. 1 of the accompanying drawing shews diagrammatically the arrangement of
a Watt meter constructed according to my present invention. The ammeter or
electro dynamometer B with its contacts and as also the electro magnets E¹ E2
and their armature (or an equivalent solenoid and spring-controlled core) the
spindle d with reversing gear e¹ c² and e, by which the torsion head B is restored
to its middle position, are all arranged and operated in the same manner as the
corresponding parts described in my said Specification No. 176948.
A is a suitable motor driven by the current, or a synchronizing or self winding
clock, which motor drives the main spindle a of the instrument on which is mounted
a cylinder or drum D wrapped with paper. Against this paper is pressed a pencil
or style m which is carried by a sliding bar acted upon in one direction by a
pulley p on the axis d and in the contrary direction by a helical spring k.
Thus the distances through which the pencil is moved being proportional to the
current passing through the controlling instrument B while the rotation of the
cylinder D is proportional to the electromotive force actuating the motor A,
the line traced by the pencil upon the paper will represent the watts consumed in
the circuit in which the instrument is placed.
In the case in which A is a synchronising or self winding clock, the curve
traced will indicate the ampères or volts consumed, according as the installation is
worked at constant potential or constant current, from which the watts can be
calculated.
Fig. 2 shews a diagram of the electrical connections G being the electrical
generator, R the circuit, A the motor, B the ammeter, or electro dynamometer
ij its contacts and arm, and E E the electro magnets or solenoid controlling
the motion of the spindle d.
D
Jof August 1890
ABEL & IMRAY,
Agents for the Applicant.

page_text: An Electrical Watt Meter, also applicable as an Ammeter or
Voltmeter.
1, ERNEST WILSON, of 2 Rose Mount, Church Lane, Charlton, in the County
of Kent, Electrical 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 :-
:―
In the Specification to my Patent No. 1764989 I described an electrical Watt
meter wherein a disc or cone rotated at a speed proportionate to the electro motive
force of the current by means of an automatic break solenoid or equivalent motor
imparts motion to the indices of a counter through a friction roller which is pressed
against the disc or cone and which is moved nearer to or farther from the centre
by mechanism controlled by an ammeter or electro dynamometer acted upon by
the current.
According to my present invention instead of causing the combined action of the
above mentioned electro motor and ammeter or electro dynamometer to produce a
registration upon a counter, I arrange these parts in combination with a cylinder
covered with paper and rotated by the motor actuated by the current, and with a
pencil or style controlled by the ammeter or electro dynamometer, so that the
pencil or style is made to effect a permanent registration upon the paper of the
cylinder by tracing a line that will represent the watts consumed.
Fig. 1 of the drawing accompanying my Provisional Specification shews
diagrammatically the arrangement of a Watt meter constructed according to my
present invention. The ammeter or electro dynamometer B with its contacts
and as also the electro magnets E E2 and their armature f (or an equivalent
solenoid and spring-controlled core) the spindle d with reversing gear cand e
by which the torsion head of B is restored to its middle position, are all arranged
and operated in the same manner as the corresponding parts described in my said
Specification No. 1769489. A. is a suitable motor driven by the current, or it may
be a synchronizing or self winding clock, which motor drives the main spindle a of
the instrument on which is mounted a cylinder or drum D wrapped with paper.
Against this paper is pressed a pencil or style m which is carried by a sliding bar
acted upon in one direction by a pulley on the axis d and in the contrary direction
by a helical spring k Thus the distances through which the pencil is moved being
proportional to the current passing through the controlling instrument B while
the rotation of the cylinder D is proportional to the electromotive force actuating
the motor A, the line traced by the pencil upon the paper will represent the watts
consumed in the circuit in which the instrument is placed.
In the case in which A is a synchronising or self winding clock, the curve traced
will indicate the ampères or volts consumed, according as the installation is worked
at constant potential or constant current, from which the watts can be calculated.
Fig. 2 shews a diagram of the electrical connection G being the electrical
generator, R the circuit, A the motor, B the ammeter, or electro dynamometer,
injits contacts and arm, and E E the electro magnets or solenoid controlling the
motion of the spindle d.
Fig. 3 shews a side elevation and Fig. 4 a plan of another arrangement of the
apparatus. A is a self winding clock, having a gravity escapement so as to keep
correct time, notwithstanding that the work put upon it may be of a varying
character. Bis, as before, an ammeter or electro dynamometer. E E the electro-
magnets, and D the cylinder driven by the clock A. In this arrangement the
continuous paper strip H is led from the roll D' over the cylinder D and thence
down to the cylinder D on which it is wound up, this cylinder being driven by an
endless cord and pulleys from the cylinder D.
The other parts are the same as the corresponding parts of the first described

page_text: arrangement and being indicated by the same letters of reference need not be
further described. With this arrangement the line traced upon the paper will
indicate either ampères or volts consumed, as above explained.
When the apparatus B is an electro dynamometer I prefer to construct this
with one coil of high resistance connected as a shunt to the supply main, and with
a second coil of low resistance through which the full current of the supply main
passes.
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. An electrical Watt meter wherein a cylinder caused to rotate at a speed
proportional to the electro-motive force of the current carries a sheet of paper on
which bears a pencil or style controlled by an ammeter or electro dynamo-meter,
so that the pencil or style is made to trace a line upon the paper that represents
the watts consumed,
2. In an electrical meter of the kind referred to in the preceding claim the use
in place of an electromotor for actuating the cylinder, of a synchronising or self
winding clock whereby the line traced on the paper is made to indicate the
ampères or volts consumed, according as the installation is worked at constant
potential or constant current, substantially as described.
3. In an electrical Watt meter, the combination of an electro motor or a self
winding clock A, a cylinder D driven thereby over which a sheet of paper is
passed, an electro dynamonicter or ammeter B and an electro magnetic clutch
apparatus EE controlling a pencil or style m which traces a line on the paper of
cylinder D indicating either watts, volts or ampères, as the case may be,
substantially as described with reference to the drawings.
Lild of Mov 1891
ABEL & IMRAY,
Agents for the Applicant.