Improvements in Electricity Meters.
Year: 1892

page_text: Date of Application, 4th May, 1892
Complete Specification Left, 4th Feb., 1893-Accepted, 15th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Electricity Meters.
I, WILLIAM FREDERICK TAYLOR of Boswell Court, Croydon in the County
of Surrey, Electrical Engineer, do hereby declare the nature of my invention to
be as follows: :-
The object of my invention is to provide means for the measurement of electrical
energy used in a circuit in given time. By my invention any mechanical or
electrical arrangement such as a clock or a motor giving approximately given
revolutions in given time may be used to revolve on a pivot a disc of metal or a set
of metallic veins or both or any metallic body of suitable shape. I prefer to use
the upward draught of air produced by an electrically heated conductor preferably
placed in a tube of glass or other bad conductor of heat to actuate an aluminium
fan or set of veins arranged screw fashion set on a vertical pivot which moves by a
screw or pinion a train of indicating wheels. I place the disc or set of veins or
both disc and veins or such other form of metallic body as may have been selected
in a magnetic field obtained in the following manner: I use a coil of metallic
conductor with or without an iron core and excited by such a convenient number of
ampere turns of the wire as will induce sufficient lines of force when placed in a
suitable relative position to the veins as will bring the veins, disc or other metallic
body placed in the field exactly to a standstill by magnetic friction (magnetic
friction being here taken to mean the electric and magnetic effects produced by the
rotation of the said veins or disc by the motor in a magnetic field or the corre-
sponding stress which must necessarily exist when brought to rest therein).
In the same plane with this coil and placed so as to embrace the same mean
magnetic line or placed at any relative angle to the coil as may be suitable and
either inside, outside or alongside of it I place another coil wound so as to counter-
act the action of the first coil when current passes through it i.e. wound so as to
give an opposite polarity to that of the first coil. The lines of force opposing those
produced by the first coil will weaken the magnetic field producing static inertia in
the veins or other metallic body and permit them to rotate when current passes
in the second coil thus measuring on the indicating dial connected with the wheels
the amount of electricity consumed in the second circuit.
Dated this 4th day of May 1892
WILLIAM FREDERICK TAYLOR.
COMPLETE SPECIFICATION.
Improvements in Electricity Meters.
I WILLIAM FREDERICK TAYLOR of Boswell Court, Croydon in the County
of Surrey, 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 ascer-
tained in and by the following statement :-
I use in my invention a disc or other suitably shaped piece of iron or any other
metal exhibiting magnetic lag as compared with air which I pivot in a magnetic
field and to which I apply a constant torque tending to rotate the said piece of iron
but restrained therefrom by magnetic friction. By suitable adjustment I arrange
the field producing this effect of such a strength that the disc or other piece of
metal is brought exactly to a standstill and so that any decrease in the intensity of
the magnetic field will permit of the revolution of the disc and record by means
of a train of wheels arranged with reference to the disc the amount of electricity
[Pain l

page_text: passing through the meter. I obtain this decrease in the following manner. My
initial field is obtained by a winding producing in a magnetic circuit either with or
without an iron, core a sufficient number of lines of force to bring the disc which is
placed in the said magnetic circuit to a standstill. Preferably in the same plane
with this coil or placed so as to embrace the same mean magnetic line or placed at
any suitable relative angle to this coil- I place another coil wound so as to annul
the action of the first coil in proportion to the current passing through it. The
lines of force produced through the coil by the current used in the external circuit
passing through its convolutions weaken the magnetic field produced by the first.
coil and allow of the rotation of the disc or other body in proportion to the current
passing. The magnetic poles are preferably adjustable for the strength of field.
Several methods may be used for producing the constant torque one of which is
shown in the drawings hereto annexed; viz. the use of a hot wire heated
electrically to produce a draught in a flue or chimney thereby tending to actuate a
fan or set of vanes arranged on the pivot of the disc.
Fig. 1. shows the elevation of the instrument as used with hot air a being the
hot wires producing the draught in the chimney b. c shows the train of wheels
actuated by the fan contained in the case d. e, e, are the adjustable magnets and
the energising coils. 9,9 are the wires connected with the retarding coil; and
h, the wires connected with the lamp circuit coil; i is the rotating disc.
Fig. 2. shows the plan of the instrument.
Figs. 3 & 4. show d in greater detail together with the fan, disc, pivot and
pinion.
Any other motion whether clockwork or otherwise may be used to produce the
constant torque.
Having now particularly described & 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 a meter for measuring electrical energy used in a circuit in given time the
use of any disc or other metallic substance exhibiting a magnetic lag tending by
means of a suitable motor to rotate but placed so as to produce equipoise by means
of a constant magnetic field substantially as described.
2. In such a mechanism the counteraction of the constant field by a winding
placed in the external circuit and the rotation of the disc or other metallic substance
substantially as described.
Dated this Fourth day of February 1893.
WILLIAM FREDERICK TAYLOR.