Improvements in or in connection with Weigh-bridges or Weighing Machines.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in or in connection with Weigh-bridges or Weighing
Machines.
I, ALBERT AEFFCKE of 16 Frauenstrasse, Stettin, in the Empire of Germany,
Scale and Weighing Machine Maker, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
The present invention relates to a device for relieving weigh-bridges of loads
which as compared with the relieving devices heretofore known does not necessitate
any special mechanism for supporting the weigh-beam. According to this invention
the locking action is effected by depression of the middle bearing.
This relieving device besides being applicable to weigh-bridges is also adapted
for use with weighing machines fitted with sliding weights (steel yard machines)
and has also the advantage that the weigh-beam when locked is horizontal thus
obviating a one-sided strain on the knife edge in case of shocks.
This invention is illustrated in the accompanying drawing in which :-
Fig. 1 is a side elevation of the improved device.
Fig. 2 illustrates the middle bearing in the depressed position, and
Fig. 3 illustrates the same in front elevation in the raised position.
A shaft arranged in a suitable part of the underframing of the weighing machine
has mounted on it near the handle k the two levers h which are connected by two
rods ss with the central bearing m which is arranged to slide along the pillar c of
the weigh-bridge.
By moving the handle k into the position shown in Fig. 2 of the accompanying
drawings the middle bearing m is depressed and consequently also the weigh-beam a
the weight scale pan and the rod z.
On further depression of the middle bearing m the weight pan will rest upon the
bracket 6 of the projecting part 9 of the framing whilst the weigh beam a is
depressed as far as the framing g allows until its stop a bears upon the weigh-beam a
and thereby locks or arrests the latter completely.
The relieving of the weigh-beam a is therefore according to this invention not
produced by means of a special support but directly by means of the depression of
the middle bearing m. The arrangement herein described is also applicable in the
same way to weighing machines with sliding weights and has also the additional
advantage that the weigh-beam when locked is horizontal thereby obviating one-
sided wear of the knife edges of the weigh-beam.
In order to lock the weigh-bridge platform the levers may be arranged to lock
or bolt the platform or bridge by means of the rod d.
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 :-
l
1. A device for relieving weighing machines of loads in which the weight pan
is caused by the depression of the middle bearing m to take a bearing upon a
suitable part in such a manner that the weigh-beam a becomes relieved of load
substantially as and for the purposes herein before set forth.
2. The direct locking of the weigh-beam of weighing machines by depressing
the middle bearing in such a manner that the weigh-beam remains in a horizontal

page_text: position whereby the knife edges are effectively protected from injury substantially
in the manner and for the purposes hereinbefore set forth.
3. The improved arrangement and construction of weigh-bridges or weighing
machines substantially in the manner and for the purposes herein before described
and illustrated in the drawings hereunto annexed.
Dated this 15th day of November 1894
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.