Improvements in Balances.
Year: 1890

page_text: Date of Application, 15th Sept., 1890-Accepted, 1st Nov., 1890
COMPLETE DI MUITIVATION
Improvements in Balances.
We, FERDINAND KOCH and CARL KOCH. both of No. 15, Warstrasse of Hannover
in the Province of Hannover and Kingdom of Prussia, German Empire, Mechanicians,
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:-
Our invention relates generally to combinations of double-armed weigh-bridges
with simple lever-balances, the latter constructed as inclination-balances; and relates
particularly firstly to the manner of connecting both kinds of balances, secondly to
the arrangement of the connecting links, and thirdly to the construction of the
pointing-device.
In order to make our invention more clear, we refer to the accompanying
drawings, in which similar letters denote similar parts throughout the several views,
and in which:
Fig. 1 is the simplest form of our new balance,
Fig. 2 is a part of the same drawn to a larger scale,
Fig. 2 is a modification of that part, and
Figs. 3 to 5 are modifications of our new balance.
The scale-pan M, Fig. 1, rests upon two knife-edges a³ a³ secured to two bent-
levers a a', the latter oscillating on two knife-edges a² a² attached to the frame t of
the balance. The two bent-levers a a¹ every of which carries a weight g glare
connected at their under extremities by a rod z. Besides the weight g the bent-lever a
is provided with a short straight lever w the purpose of which will be explained
hereinafter. An axle b provided with knife-edges at both extremities is supported
by parts of the frames and carries a disk to which is secured a short lever w¹,
Figs. 1 and 2. the latter being connected with lever w by a rod h. The axle b bears
also a hand and a counterweight, the former sliding along a graduated arc d
arranged near the base of the frame.
When loading the scale-pan M by anything the long vertical arms of both the
bent-levers a a¹ are moved a certain degree from the right to the left according to
the load, and the axle b is turned in a sense contrary to the direction of the hands
of watches, thus moving the hand ¹. As described above the bent-lever a is con-
nected with axle b by lever w, rod h and lever w¹, and any movement of lever a must
effect a movement of hand. 21, as clearly to be seen from the drawing.
In the modification represented by Fig. 2 the lever w' with its disk are dispensed
with, and replaced by another disk c' of larger diameter around the rim of which is
laid a ribbon ¹ secured at one side to said disk, and at the other to rod thus also
effecting the turn of hand z¹. In case the disk be a perfectly round one as drawn in
dotted lines cc, Fig. 2, the graduation of the arc d cannot be regular; for using
regularly graduated are the disk c¹ ought to be formed as drawn in full line cccc,
Fig. 2.
In the second modification represented by Fig. 3 there are not only lever w¹ with
its, disk dispensed with but the lever w and rod.h, too; these parts are replaced by
two sectors of cog-wheels 23 the manner of working of which is made perfectly
clear by the drawing, Fig. 3.
Balances of such kind as described above are owing to their principle to be used
for small weights only. In order to allow weighings of larger extent the modification
Fig. 4 has been constructed. In this case two graduated arcs ff' are employed,
one of which (f) forms a perfect circle, and the other 1 forms a part of a circle
placed within the circle f. A hand 2¹ moved by the disk c slides along the arc f¹,
and carries at its under extremity a sector of a cog-wheel, the sector imparting

page_text: motion to a small cog-wheel s² arranged in the center of the circle f. The axle of
said cog-wheels bears a hand 22 sliding around the circle f. The graduation of both
the arcs, and the curvature of the disk may be preferably arranged so as to mark
kilogrammes by hand 2 upon arc f', and grammes by hand 22 on arc f. The move-
ment of the disk c is effected in exactly the same manner as before described. The
graduation of the arcs depends on the curvature of the disk c which is preferably
formed so as to allow regular graduations.
A third modification represented by Fig. 5 shows that the combination forming
the object of our invention may be applied to balances of the kind drawn likewise.
The scale-pan M is secured to the vertical rod m¹ the latter being in connection with
a double-armed lever a a' and with two one armed levers w and The lever a a¹
rests upon a column t by means of a knife-edge a², and is provided at its free
extremity with a poise 9. The lever w firmly secured to rod m' is at its other
extremity connected to the ribbon laid around the curve disk c¹. The lever q
fastened at one end to rod m¹ and at the other to column t serves to hold the scale-
pan M always in due horizontal position, together with four guiding-rollers m². The
disk c is moreover provided with a counterweight 9' by axle 6 and connecting
rod. The hand and arc are removed in order to show the mechanism of the balance.
Having now particularly described and 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.) The combination of a weigh-bridge with an inclination-balance, both connected
either by rods or by ribbons and cordons or by sectors of cog-wheels and friction-
wheels, one balance acting upon the other, for the purpose as described.
2.) A weigh-bridge containing two or more levers a a arranged side by side in
combination with an inclination-balance, both balances connected so as to turn to
contrary sides, for the purpose as described.
3.) A weigh-bridge containing two or more levers a a¹ arranged side by side in
combination with an inclination-balance, both balances connected so as to turn to
contrary sides, by means of one or more elastic or inelastic ribbons or cordons h¹
adapted to be rolled up and down a circular or curved disk or cylinder c c¹, for the
purpose as described.
4.) A weigh-bridge containing two or more levers a a¹ arranged side by side in
combination with an inclination-balance, both balances connec ed so as to turn to
contrary sides, by means of one or more elastic or inelastic ribbons or cordons h¹
adapted to be rolled up and down a circular or curved disk or cylinder c c', and in
combination with two hands z¹ 22 and two graduated arcs ff, one hand moved by
said disk c c¹ and sliding along an arc f¹, the other hand sliling along the other
arc and moved by cog-wheels and sector s¹, the latter being secured to hand 2¹,
for the purpose as described.
5.) A weigh-bridge containing two or more levers a a¹ arranged side by side in
combination with an inclination-balance, both balances connected so as to turn a disk c¹
composed of peculiar curves c² c3 c c and adapted to cause the normal position of
the hands after one or more rotations of the latter, for the purpose as described.
Dated this 15th day of September 1890.
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicants.