Improvements in Electricity Meters.
Year: 1898

page_text: Date of Application, 4th Aug.. 1898-Accepted, 24th Sept., 1898
COMPLETE SPECIFICATION.
Improvements in Electricity Meters.
I, ERNEST SCHATTNER, of 78, Mill Hill Road, Norwich, in the County of
Norfolk, 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:-
My invention relates to certain improvements in electricity meters. Briefly
my invention consists in the employment of a pivoted balanced lever in con-
nection with a voltameter of some suitable type the passage of the current through
the voltameter being arranged to alter the weight upon one end of the lever so
that the amount of current consumed may be found by obtaining by a moving
weight or otherwise a balancing point for the lever such point being read off on
a suitably situated scale or the like.
my
In the accompanying drawing is illustrated one form in which invention
may be carried into effect.
In this a is an insulating base or back, and b is a lever pivoted and balanced
at e preferably on a knife or rocking edge such pivot point being situated near
one end of the lever. On this end of the lever is hung preferably on a knife
or rocking edge d the negative plate e of a voltameter f the positive plate g being
suitably held or fixed. The voltameter may contain a copper solution and the
plate may be of copper. As shown it is attached to the base or back a at h.
The lever bis graduated and at the end opposite to the voltameter it carries a
regulating weight and a pointer pointing to a few fixed divisions on a
scale opposite the pointer. The base also carries a block or stop j and a set
screw k. The lever carries a sliding block or weight having a 'suitable pointer
and carrying a pin m which may be embraced by an eye n carried by a sliding
clip o moveable on a bar p carried by the base or back. The clip o may have
attached to it cords a passing over pulleys and terminating in knobs or any
device convenient for the hand. The base or back carries two terminals st for
the main wires which terminals are connected by a resistance u. To the terminal t
is also connected a second resistance in a branch circuit which includes a con-
nection w, the lever b, the negative plate e, positive plate g, terminal h, and
wire w¹, which passes to terminal s. The path of the main current is across the
resistance u while the shunt is through wire w¹, to plate g, across to plate
which the metal from plate g is deposited, to lever band wire w and resistance v
to terminal t. When the apparatus is in use the lever is first balanced by the
plate e and the regulating weight 2, the block 7 being arranged with its pointer
at zero, and the screw kis then raised to force the lever against the stop j. To
ascertain the amount of current used, the screw k is lowered and the sliding
block is moved along the lever by pulling the slide o through the medium of
one of the cords g until the lever is balanced when the units are read off on the
scale. From this balancing point the next reading is taken the screw k being
raised again until the reading is to be found.
onto
It will be obvious that the arrangement as above described, and as illustrated,

page_text: may be varied in its details, such as in the arrangement of the scale, the means
for moving the sliding block on the lever, the construction and arrangement of
the voltameter and the like, without departing from my invention.
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:-
1. In an electricity meter, the combination with one element of a voltameter, of
a balanced pivoted lever, a sliding part on same adapted to bring the lever to
a balance, and a scale on which the position of such sliding part may be read,
substantially as described.
2. In an electricity meter, the combination with the negative element of a
voltameter, of a pivoted lever carrying same, a graduated scale on said lever, and
a sliding part for said lever, adapted to balance same, and to indicate on the scale,
when the lever is balanced, the amount of current consumed, substantially as
described.
3. In an electricity meter, the combination and arrangement of a voltameter,
graduated pivoted lever, and balancing device, substantially as described and
illustrated in the drawing.
Dated the 4th day of Å vovat 1000
PHILIP M. JUSTICE,
55 and 56, Chancery Lane, London,
Chartered Patent Agent,
For the Applicant.