Beam and Weighing Machine Manufacturers
Year: 1871

page_text: PROVISIONAL SPECIFICATION left by Thomas Donbavand, Daniel
Donbavand, and William Donbavand at the Office of the Commis-
sioners of Patents, with their Petition, on the 13th May 1871.
We, THOMAS DONBAVAND, DANIEL DONBAVAND, and WILLIAM DON-
BAVAND, the younger, of the City of Manchester, in the County of
Lancaster, Scale Beam and Weighing Machine Manufacturers, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN SCALE BEAM
WEIGHING MACHINES," (to be as follows) :-
The first part of this Invention relates to those weighing machines
in which the goods scale is required to be stationary on the floor or
other position when the goods are placed on and taken off the scale, and
where the plate or scale which carries the weights is supported indepen-
dent of the scale beam, and our improvements consist in effecting this
object in a more efficient and economical manner than in any machine
at present in use.
The second part of this Invention relates to the suspending frames
which carry the beam and scales of ordinary balances, and consists in
placing the vertical steel or other metal pieces for the pivots of the

page_text: beam to work against in such positions that they can be made of great
strength and be readily fastened in the frames.
The nature of our improvements will be understood by the following
description thereof, reference being had to the figures and letters on the
accompanying Sheet of Drawings in which Figure 1 is a longitudinal
elevation, and Figures 2 and 3 longitudinal sections of part of a weighing
machine in which the weight scale can be supported independent of the
scale beam, and Figures 4 and 5 are side and end views of a suspending
frame having our improved steel or other metal pieces for the pivots to
work against.
In Figures 1, 2, and 3, a represents horizontal arms on which the
weight scale is supported when the goods are being put on and taken off
the goods scale, but separated from the scale when the goods are being
weighed, and the arms are shewn in their lowest or separated position
in Figures 1 and 2, and in their raised position when supporting the
weight scale in Figure 3. The arms a are fixed to an upright plate b
having ends fitted in grooves in the sides of the box c fixed to the
frame d which carries the pillar and scale beam. To the lower part
of the plate b is jointed one end of a connecting rode having its other
end jointed to a short lever f fixed to the shaft g carrying a long lever h,
Fig. 1, the said levers being at or about right angles with each other
or in any convenient positions. When the goods are being weighed
the weight scale swings by its chains connected to the scale beam in the
usual manner, and when this is the case the short lever f is horizontal,
as seen in Figure 2, and the long lever h vertical, but when the goods
have been weighed the long lever is pulled and pushed downwards
and the short one raised, as shewn in Figure 3, so as to raise the arms a
and weight scale and weights and leave the goods scale in position to
have the goods removed and others placed on, and as the short lever
is being turned from the horizontal to an inclined position the leverage
is continually increasing and the weights raised with greater ease than
in any machine hitherto in use, and the same effect is produced if the
two levers are in different positions but having the same leverage in
relation to each other. In the Drawings the short lever f is shewn
in the centre of the box c, but two levers may be placed at the
outsides of the box, in which case there would be no necessity for the
space for the lever to work in.

page_text: In Figures 4 and 5 we represent a suspending frame hung on outside
bearings fixed in a stand connected or cast to a pillar, the said hanging
frame being furnished with our improved steel or other metal pieces for
the pivots to work against. These pieces, which are marked m, are
dovetailed into the outer edges of the suspending frame n, and to
suspending frames in general we apply this method, or instead of it
drive the steel or other metal pieces into rectangular or other formed
slots in the frames.