IMPROVEMENTS IN WEIGUING SCALES
Year: 1884

page_text: COMPLETE SPECIFICATION.
I, OTTO KNEIST in Hannover (Germany) Coach Builder do hereby declare the
nature of my said invention for IMPROVEMENTS IN WEIGUING SCALES and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :—
In order to make household scales sensible for the smallest weight the inventor
makes the weight exercise effect on the springs by means of lever transmission; the
new construction of scales based on this principle is represented in Fig: 1 in front
view with cover plate removed.
The basin to be lifted off lies in a plate b, which rests by means of bar b¹ on the
bow c; the bar d is a rigid prolongation of the latter resting on the core-edges e e¹
and moving in the two connection pieces ffl. The transmission-piece catches in
the two side-walls g g³ of the bow c, is bedded with core-edge m in i and forms in
conjunction with lever & connection-piece k the most important part of tho
present construction.
On the lower end of lever h, which is bent in a double angle, is the already
mentioned connection-piece k which is provided at both ends with core-prints n n¹
and the purpose of this connection-piece is to transfer the motion of the lever / to
the already mentioned double-armed lever, which moves in core-print o of the
support g through its core-edge u.
The end of the lever opposite to the bedding n is connected by means of a joint
with the double-armed stay the two springs 88' are hung with the lower ends
each to a side hook of the stay and their upper ends are hung on to studs v v
fastened to the back-wall of the scales.
The cogged bar w, which catches into the cog-wheel x is applied to the middle of
the stay, by means of spring s¹ the cogged-bar w is always pressed on to cog-
wheel in order to attain great surety in the working. The proportion of the
cog-wheel x to the cogged-bar w is 1 to 5, so that the pointer B fastened to the
shaft of the cog-wheel x can revolve five times round the dial-plate C of the scales.
In order to ascertain how often the pointer B has revolved round the dial-plate a
second and smaller pointer y is fixed to the double-armed lever D, which again is
fixed loose on shaft z.
The joint-lever D is brought into connection with stay in its longer arm by
means of lever E.

page_text: The functioning of the scales is very simple. The weight acts direct on the
bow c and its effect is transferred from the latter to lover h and by means of
connection-piece k to lever l. The latter stretches the springs fastened to the
stay r & draws the cogged-bar down; at the same time the stay r takes the lever D
by means of lever E along with it, which serves to give the pointer y a circular
motion. These scales are shown in front view and with the dial-plate screwed on
in Fig. 2. and in Fig. 3 the construction represented in Fig. 1 is shown in section
to I II through Fig. 1.
Fig. 4 shows the connection of the stay with the double armed lever D by
means of lever E in detail.
Fig. 5. shows the bow c.
"
6. the support i in detail.
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
In Household Scales 1
1.) the construction just described consisting of the bow c and of the lever
combination, which latter is composed of the double-armed lever, which is
supported in i and catches into the two sido-walls g g¹ of the bow c, further of the
connection-piece k and of the lever which is bedded in q, and which operate, on
one another in the manner just described.
2.) for the purpose of attaining an absolutely sure motion of the bow in the
vertical and to make it horizontally, immovable, the application of the lever d,
which is rigidly connected with the bow c, in combination with stay f, which by
means of two core edges e e¹ placed opposite each other serves to support the lever.
3.) for the purpose of reading on the scale how often pointer B revolves round
the dial-plate the construction describod and drawn to set the pointer y in motion,
which construction consists of joint-lever D bedded on shaft 2. the shorter arm of
which bears the pointer 3, combined with lover E fastened on to the stay.
Dated this 6th day of November 1884.