Apparatus intended to Determine the Quantity of Metal which a Galvanoplastio Bath should Deposit on the Object Treated.
Year: 1896

page_text: Apparatus intended to Determine the Quantity of Metal which a
Galvanoplastio Bath should Deposit on the Object Treated.
JOSEPH DUCOT of 6 Rue de Braque, Paris France, Inventor, do hereby declare the
nature of this invention to be as follows:-
The apparatus to which the present invention relates is intended to aid the
electrotypist in observing and controlling his work.
It is a system of double weighing, the first weighing must mark zero on the dial
and the second, starting from this point, shows a progressive and graduated
advance, representing exclusively the afferent weight of the galvanic deposit.
The apparatus is composed of a balance-lever resting at its centre on two supports
and a balance knife-edge. The left portion of the balance-lever carries a fixed
counterweight which it passes through lengthwise above its ceutral axis, the object
of this arrangement being to cause a progressive increase of the ascensional
resistance during the second weighing. The right portion of the balance-lever is
arranged as a rack bar, on which moves a sliding counterweight, by means of
which, an equilibrium is obtained by counter-balancing the weight of the object
treated.
On the same right side of the balance-lever and near its centre is susponded a rod
carrying the pieces which dip in the bath.
At the left hand of the balance-lever a needle moves on a registering dial-plate,
from 0 to the point where it meets a moveable handle, previously placed at the
point where the operation, should cease.
In the motion of the balance-lever the compensations are assured by the placing
out of centre of the fixed counterweight and by an indented bar secured diagonally
on the sliding counterweight and lastly by a spherical regulator placed above the
balance knife-edge.
The moment the needle, which gradually rises, reaches the little handle, it closes
a circuit setting in motion a signaller and an electro, which, by the automatic
reversing of a moveable commutator, stops the electrolytic current and arrests the
operation.
ted this 20th day of Anant 1806
L. DUVINAGE,
Agent for Applicant,

page_text: Apparatus intended to Determine the Quantity of Metal which a
Galvanoplastic Bath should Deposit on the Object Treated.
I, JOSEPH DUCOT of 6 Rue de Braque, Paris, France, Inventor, 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 apparatus which is the object of the present invention is intended to facilitate
galvanoplasts in superintending and controlling their work. It is a system with a
double weight the first of which, called the lower weight, is placed in equilibrium
on the zero point of the dial, and the second, or upper weight is from this point
progressive and graduate, and comprises exclusively the weights of the galvanic
deposit.
The annexed drawing represents an elevation of the apparatus showing in a vertical
section the galvanoplastic bath.
The apparatus is composed of a balance-beam A of a rectangular form for the
greater part of its length and circular in its centre-line. The right side of the balance-
beain has its upper face indented, this latter rests, by means of the blade I which
traverses it in its circular part, upon two supports M fixed upon a square plate N
which itself rests upon the two columns fixed upon a large sole P which supports
the whole system and which is placed above the trough containing the galvanic fluid.
The balance-beam has, at its left extremity, a fixed counterpoise 1; the lower part
(relatively to the longitudinal axis of the beam) of which is heavier than the upper
part this position of the counterpoise, relative with the balance-beam which supports
it, is intended to progressively increase its ascensional resistance in the distance it
accomplishes during the course of the upper weighing, that is to say, of the weighing
of the metallic matter deposited electrolytically on the objects plunged into the
trough. The counterpoise B is held, at rest, by a ring X fixed to the support Z and
hooking over a pin secured to the counterpoise.
On its right arm the balance-beam is provided with a sliding counterpoise C
moved by a pin D acting upon a small cog-wheel placed in the inside of the counter-
poise and fitting into the rack of the balance-beam. This sliding may, consequently,
be displaced along the right part of the balance-beam. The pin D ncts at tho saine
time by means of a second cog wheel, upon a little rack bar H secured diagonally to
the counterpoise C and serving to facilitate the putting in equilibrium of the beam.
This possesses a second blade K in proximity with its centre-line and which supports,
by means of a clasp V, a stemn T which holds by means of a frame U, U the objects
which are plunged into the trough.
On the left-extremity of the plate is a hand S sliding according to the movement
of the balance-beam on the dial R from its zero point to the point where it meets
with a small regulator which slides in a slot fixed in a dial-plate and is put with
the hand at the point corresponding with termination of the electrolytic operation
which takes place as hereafter described.
The dial rests upon the frame-plate P as also does a support Z upon which is the
counterpoise B when the apparatus is at rest and which is supplied with a ring
which holds the counterpoise.
A sphere L screwed to a stem fixed to the centre-line of the balance-beam serves
for regulating the movement of the hand of the registering apparatus R according
to its elevation on the stem it lessens or terminates the ascension of the hand along
the dial plate.
The slide C serves for putting the balance beam at the point of equilibrium desired
that is zero on the dial. The indented piece E placed horizontally above the slide C

page_text: is put into movement by means of the pin G which serves for conveying it from
right to left as the case may be, in order to facilitate the precision of the equilibrium
of the point chosen on the dial which precision would with difficulty be attained by
the pin D above. The indented piece E is moreover intended to counterbalance the
divers influences of the lever produced by the diversity of the weight of the object
suspended to the stem and plunged into the galvanic trough.
An electric board placed in proximity with the apparatus and commanding the
service circuit of the galvanic trough and a second circuit serving as a rupture to
the former is furnished with an ordinary commutator g-a bell f and an electro
magnet a acting upon the automatic current stopper b.
This being established the balance beam and the regulator being put to point
the electrolytic current is established, the progress of the operation may be followed
on the dial that is to say, the metallic deposit upon the objects plunged into the
trough, as soon as the hand S which rises progressively, comes into contact with the
regulator h the circuit acting upon the bell and the electro magnet indicated by a
dotted line in the figure is closed, the electro inagnet acts upon the interruptor, b
which severs the electrolytic current (indicated by mixed lines in the drawing) and
stops the operation at the same time that the bell f announces the end of the
operation.
Having now particularly described and ascertained the nature of this said
invention and in what manner the same is to be performed I declare that what
I claim is:
1. An automatic apparatus for determining the quantity of metal which a
galvanoplastic bath should deposit characterised by a balance-beam bearing a sliding
counterpoise C to which is fixed diagonally a small indented bar H to assure the
strict correctness of the weight of the quantity of metal electrolytically deposited
notwithstanding the diversity of the weight of the objecta plunged into the trough;
characterised also by au indented piece E facilitating the fixing in point of the
balance-beam and also by the use of the spherical regulator L and the throwing off
axis of the counterpoise B on the balance-beam.
2. In the apparatus claimed under 1 the means of causing the end of the
operation by the contact of the band S of the registering dial R closing an electric
circuit which acts upon an electro magnet and putting into movement the automatic
interruptor b of the galvanoplastic current at the same time as a bell f inter-placed
in the said circuit announces the completion of the operation.
Dated this 20th day of May 1897
L. DUVINAGE,
Agent for Applicant.