IMPROVEMENTS IN WEIGHING MACHINES
Year: 1884

page_text: I, WILLIAM PHILLIPS THOMPSON Fel Inst P.A. of the Agency for Foreign
Patent Solicitors 6 Lord Street Liverpool in the county of Lancaster and 323 High
Holborn in the county of Middlesex, Civil Engineer, do hereby declare the nature
of the said invention for "IMPROVEMENTS IN WEIGHING MACHINES (a commu-
nication from abroad by Jules Dusautoy of Paris, in the Republic of France,
Inventor) to be as follows:-
"
The improvements which are the object of this application for Letters Patent
are especially applicable to weighing machines of the construction known as the
"coulon" they are designed to render this description of weighing machine more
exact in its results by means of a vertical adjustment and moreover to facilitate
the manufacture by an improved combination of the parts forming the supports of
the mechanism with the outer casing of the machine. These improvements consist
essentially (1) in attaching to the adjusting lever a weight capable of being
adjusted vertically, which does away with the necessity of having to find out the
proper adjustment of the machine.
(2) In casting all the supports of the mechanism in one piece with the casing,
which greatly simplifies the construction.
(3) In casting in ordinary metal all the parts constituting the mechanism,
instead of in malleable cast iron, which considerably reduces the cost.
The improved weighing machine consists essentially of a pan or platform
supported by means of cross arms resting upon four vertical pillars. These pillars
rest upon a frame, hanging by means of C shaped links bearing on knife edges,
from an upper frame the ends of the main lever projecting out of the case are
bent at a right angle to receive the graduated scales, upon which slide, weights
counterbalancing the load placed on the platform This lever is cast in one piece
with a perpendicular piece the ends of which provided with knife edges rest on
supports forming part of the casing. The main lever has another arm, bearing at
its end a weight capable of vertical adjustment. To the main lever, but on the
Prion G21

page_text: opposite side to the weight for vertical adjustment, a spirally grooved rod is
affixed on which another weight screws laterally also for the purpose of adjusting
the mechanism.
The main lever is attached to the lower frame which carries the platform, by
means of an intermediate frame, a cross piece and C shaped links. The ends of
these pieces connected by the links are furnished with rounded edges or pivots or
knife edges may be substituted if preferred.
The mechanism may be modified by placing the frame which bears.the pillars
and platform above the intermediate frame and connecting the two by means of
a bent connecting piece instead of links. This construction of weighing machines
is applicable to weighing machines of all dimensions.

page_text: Improvements in Weighing Machines.
"
I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster and
323 High Holborn, in the County of Middlesex, Civil Engineer, do hereby declare
the nature of the said invention for "IMPROVEMENTS IN WEIGHING MACHINES
(a communication from abroad by Jules Dusautoy, Paris, in the Republic of
France, Inventor) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
The improvements which are the object of this application for Letters Patent
are especially applicable to weighing machines of the construction known as the
"Coulon:" they are designed to render this description of weighing machine more
exact in its results by means of a vertical adjustment and moreover to facilitate
the manufacture by an improved combination of the parts forming the supports of
the mechanism with the outer casing of the machine. The improvements consist
essentially (1) in attaching to the adjusting lever a weight capable of being
adjusted vertically, which does away with the necessity of having to find out the
proper adjustment of the machine. (2) in casting all the supports of the mechanism
in one piece with the casing, which greatly simplifies the construction. (3) in
casting in ordinary metal all the parts constituting the mechanism, instead of in
malleable cast iron, which considerably reduces the cost.
The simplicity of the construction of these improved weighing machines will be
readily seen from the annexed drawings:-
Figure 1 is an elevation of the machine, the front of the casing being removed
so as to show the mechanism.
Figure 2 is a plan viewed from above, the platform, the cross-arms and the cover
of the case being removed.
Figure 3 is a transverse section on the line 1-2 of Figure 2.
The lever A the ends of which projecting out of the case B are bent at a right
angle at a and a¹ to receive the graduated scales a and s is cast in one piece with
the perpendicular portion A¹ the lower ends of which are provided with knife
edges c c Figure 3 resting on corresponding supports attached to the supports CC¹
cast in one piece with the casing B. Another arm A² also cast in one piece with
the lever A and A¹ bears at its end a weight P the position of which can be
adjusted by means of screws on the vertical spirally grooved rod p. Another
screw rod a³ occupies the opposite side to that of the arm A' upon which the
weight a³ is adjusted. By means of the weights P and a³ the correct balance of
the mechanism may be readily attained. The lever A is attached to the lower
frame D bearing four vertical shafts & for the support of the cross arms E and the
platform F by means of an intermediate frame G, a cross-piece H and the
C-shaped links I as shewn in Figures 1 and 3. The ends of these pieces connected
by links are furnished with rounded edges or pivots as shewn in the drawings or
knife edges may be substituted as is commonly done in balances of all systems.
Figures 2 and 3 shew that the said pivots or knife edges are cast in a piece
with the casing B, which materially simplifies the labour and cost of construction

page_text: enabling the mechanism to be put together in less time. The castings in ordinary
metal also require less work to fit them for use than those in malleable cast iron.
The machine operates by the movement of the pieces S¹ and s' upon the graduated
scales S and s Figure 4 is a transverse section of a modification of the above
arrangement.
Frame D the four columns & of which support the cross-arms E and plat-
form F is placed above the frame G and a connecting piece I' replaces a link
to connect the cross piece H. with the frame D, all the supports of the mechanism
in this case also are cast in one piece with the casing and can be adapted either for
round or for knife edges.
This construction of weighing machine is applicable to machines of all
dimensions.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is
1. In weighing machines the combination of the lever A with a weight P
movable upon the spirally grooved shaft p as requisite for the adjustment of the
balance.
2. In weighing machines the combination of the improved casing B cast in one
piece with the supports of the mechanism of the balance.
W. P. THOMPSON & Co.,
Agents for the Applicant.