IMPROVEMENTS IN WEIGHING. MACHINES
Year: 1878

page_text: LETTERS PATENT to Ernest Honoré Juliard-Dunial, of Le Mans (Sarthe),.
France, Manufacturer, for the Invention of "IMPROVEMENTS IN WEIGHING.
MACHINES."
Sealed the 28th February 1879, and dated the 9th September 1878.
PROVISIONAL SPECIFICATION left by the said Ernest Honoré Juliard-Dunial
at the Office of the Commissioners of Patents on the 9th September 1878..
ERNEST HONERÉ JULIARD-DUNIAL, of Le Mans (Sarthe), France, Manufacturer.
"IMPROVEMENTS IN WEIGHING MACHINES."
t
My Invention relates to weighing machines of the steelyard kind, in which the
weight of an object placed on a platform or weighbridge is ascertained by the load
on a beam, and the position of a sliding weight on a graduated bar or scale. In
such machines, as they are usually constructed, the scale is placed above, below, or
at the side of the beam, not in the axis of suspension.
According to my improvements, the scale being so coupled to the beam that both
move within their points of support, the centre of gravity of these parts and of the
sliding weight is at the moment of equilibrium in the horizontal plane of the knife
edges of the beam, the scale does not remain loose, and there is no twisting effect
on the parts.
In so connecting the scale to the beam the axis of suspension is cranked, so as to
give freedom for the passage of the sliding weight to either side, and in this manner
there is obtained a greater length of slide, and consequently increased delicacy in
weighing.
I arrange the system of levers and connections by which the strain of the weight
on the platform or bridge is transmitted to the beam so as to give great steadiness,
and to permit of the complete disengagement of all the working parts when the
apparatus is thrown out of action. For this purpose, in the connecting rod by
which the strain is transmitted from the lever below to the beam above, I provide a
right-and-left, screw and stirrups, so that when the machine is not in use the lever
can be lowered down upon supports provided for it, by which movement all the
AJ...מז

page_text: knife edges are relieved. By cranking the levers and cross bars, I am enabled to
arrange these knife edges so that each set, that is to say, those at the middle and
those at the extremities of each bar, are on one level, thereby avoiding the rocking
of the parts, and giving freedon for their movements across each other.. I make
the constant adjusting weight of the beam in the form of a hollow vase, the weight
of which can be accurately adjusted by pieces of metal, bullets, and the like, intro-
duced into the interior, and secured therein by a screw cap.
In some cases, I make the beam consist of two parallel bars with a space between
them, into which can be introduced several scales, such as those for pounds,
hundredweights, or the like, each scale having its own sliding weight, and the
connections of the bars being cranked to afford room for the movements of these
weights.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Ernest Honoré Juliard-Dunial in the... Great Seal Patent Office_on_the
6th March 1879.
ERNEST HONORÉ Juliard-DuniaL, of Le Mans (Sarthe), France, Manufacturer.
"IMPROVEMENTS IN WEIGHING MACHINES. of
My Invention relates to weighing machines of the steelyard kind, in which the
weight of an object placed on a platform or weighbridge is ascertained, by, the load
on a beam, and the position of a sliding weight on, a graduated bar or scale... In
such.machines, as, they are usually constructed, the scale is placed above, below, or
at the side of the beam, not in the axis of suspension.
.
I
According to my improvements, the scale being so coupled to the beam that both
move within their points of support, the centre of gravity of these parts and of the
sliding weight is at the moment of equilibrium in the horizontal plane of the knife
edges of the beam, the scale does not remain loose, and there is no twisting effect
on the parts.
.
"
In so connecting the scale to the beam the axis of suspension is cranked, so as to
give freedom for the passage of the sliding weight to either side, and in this manner
there is obtained a greater length of slide, and consequently increased delicacy in
weighing.
..
I arrange the system of levers and connections by which the strain of the weight
on the platforin or bridge is transmitted to the beam so as to give great steadiness,
and to permit of the complete disengagement" of all the working parts when the
apparatus is thrown out of action. For this purpose, in the connecting rod by
which the strain is transmitted from the lever below to the beam above, I provide
a right-and-left screw and stirrups, so that when the machine is not in use the lever
can be lowered-down upon supports provided for it, by which movement all the
knife edges are relieved. By cranking the levers and cross bars, I am enabled to
arrange these knife edges so that each set, that is to say, those at the middle and
TH

page_text: of the parts, and giving freedom for their movements across each other. I make
the constant adjusting weight of the beam of the form of a hollow vase, the weight
of which can be accurately adjusted by pieces of metal, bullets, and the like, intro-
duced into the interior, and secured therein by a screw cap.
In some cases, I make the beam consist of two parallel bars with a space between
them, into which can be introduced several scales, such as those for pounds,
hundredweights, or the like, each scale having its own sliding weight, and the
connections of the bars being cranked to afford room for the movements of these
weights.
On the accompanying Sheet of Drawings I have shewn a weighing machine
constructed according to my above-described Invention, having a double beam and
several graduated bars.
Fig. 1 shews & side elevation; Fig. 2 shews a plan, the platform being removed
to shew the arrangement of the levers; and Fig. 3 shews an end elevation.
The base may for, strong machines consist of a wooden frame resting on dwarf
walls with stone sills, which receive directly the whole weight.
The construction shewn in the Drawing merely indicates a light machine with
the base a resting on feet b. The base a carries the four standards f, f, each two
of which are connected by a metal plate g, and which receive the whole weight of
the platform through the knife edges at the ends of the bars h, which form the
bases of the triangular cranked levers p. These levers also carry two other bars h
for which the ends, formed with knife edges o, support the brackets n fixed, to the
under side of the platform P. The one lever p is suspended from the other, as
shewn at Fig. 1, by means of a looped link q formed with knife edges on which the
levers bear. The cranked lever p extending the whole length of the platform has
at its free end a knife edge resting on the link q' connected to the suspension
rod S, which. is connected at its upper end by a hook and stirrup piece t to the
double beam A, A, resting on knife edges 7, 7. The rod S may be formed of two
parts connected by a screw or other device for lengthening or shortening the rod,
the latter being shortened when the machine is to be put in use.
In strong machines the platform may rest on fixed supports when not in use, so
as to relieve the brackets n and knife edges of the levers. For this purpose, by
lengthening the suspending rod about 1 inches, the knife edges will be lowered
about / inch, and the platform being only free to drop about th inch; the knife
edges will be perfectly relieved.
ths
The two beams are connected by the curved axis C terminating in the knife
edges D, which rest on brackets E forming the supports or fulcra carried by the
standard F. The curved axis C allows of the beam A and the graduated bars or
scales B, B1, B3, being placed between the points of support E so that the sliding
weight H, H, H2, can freely slide along their entire length. The beam A and
scale bars B, B1, B2, are connected at their ends by transverse bars A¹ so as to
form a rectangular frame. The centres of gravity of the beam A and the scale
bars B, B1, B2, with their sliding weights H, H1, H2, are thus always in a line
parallel with the line of suspension of the knife edges, which gives precisely the
same result as though the beam and the line of the knife edges were directly acted
upon.
The adjustment of the balance is effected by means of small lead weights or iron
filings placed in the tray L surrounding the rod N of the weighing scale M. This
tray might be closed by a cover.
The sliding weights instead of being formed as a double frustrum of a cone, as is
generally the case, may be of various other forms.
The several scale bars correspond to units of different orders of weights, such as
one for hundredweights, one for quarters, and one for pounds.

page_text: Having thus described the nature of my said Invention, and in what manner the
same is to be performed, I claim,―
First. Constructing weighing machines with the scale bar arranged between the
two points of support of the beam to which it is rigidly connected, whereby the
looseness of the balance is avoided, the effect of the torsion diminished, and the
sensibility of the machine increased; and whereby also the sliding weights are
enabled to move along the whole length of the scale bars, substantially as herein
described.
Second. The before-described construction of the curved or cranked axis of the
beam, so arranged that the beam with its scale bars rigidly connected thereto are
situated between the two fulcra formed by the knife edges of the axis.
Third. The construction of a double beam with cranked axis, having between its
two members any desired number of scale bars fixed thereto, substantially as herein
described. O
+
Fourth. The combined arrangement of the levers beneath. the platform for trans-
mitting the strain, as herein described and shown on the Drawings.
Fifth. The combination of parts herein described, whereby the 'machine can.be
placed in a state of rest.
In witness whereof, I, the said Ernest Honoré Juliard-Dunial, have hereunto
- set my hand and seal, this Fourth day of March, in the year of our Lord
One thousand eight hundred and seventy-nine.
E. H. JULIARD-DUNIAL. (L.S.)
JARMENGAUD, jeune,
1. of Paris,
Witness.
:
Boulevard de Strasbourg, 23,
Civil Engineer.