IMPROVEMENTS IN BALANCES FOR WEIGHING
Year: 1869

page_text: LETTERS PATENT to William Donbavand, of the City of Manchester,
in the County of Lancaster, Scale Beam and Weighing Machine
Manufacturer, for the Invention of "IMPROVEMENTS IN BALANCES FOR
WEIGHING."
Sealed the 6th May 1870, and dated the 10th November 1869.
PROVISIONAL SPECIFICATION left by the said William Donbavand
at the Office of the Commissioners of Patents, with his Petition,
on the 10th November 1869.
I, WILLIAM DONBAVAND, of the City of Manchester, in the County
of Lancaster, Scale Beam and Weighing Machine Manufacturer, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
BALANCES FOR WEIGHING," to be as follows:-
This Invention relates to the suspending frame and bearings for the
central pivots of the beam, and also to the suspending frames to which

page_text: the scales are connected, and consists in the construction and arrange-
ment of pedestals applied to the suspending frames. The pedestals are
made with different formed cavities, in which hard steel or hard stone
bearings are placed for the beam pivots or knife edges to move on, the
object being to effect economy in the manufacture and enable the parts
to be separated and cleaned with ease and dispatch.
The nature of the 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 Fig. 1 is an clevation
of a scale beam and suspending frames provided with one arrangement
of my improvements; Figs. 2. and 3, vertical sections of the central
suspending frame, pedestal, and bearings; Fig. 4, a sectional plan of the
same; Figs. 5, 6, 7, and 8, sectional plans of different forms of bearings;
and Figs. 9 and 10 are vertical sections of one of the end suspending
frames, pedestals, and bearings.
a, Figs. 1 and 3, represents the beam entire and in section; b, the
central pivots; c, the end pivots; d, the central suspending frame;
e, the end suspending frames; f, Figs. 2 and 3, the bearings which
support the central pivots; and g, Figs. 9 and 10, the bearings which
bear on the end pivots. In one arrangement I form the cavities for
the bearings in one block or pedestal held to the suspending frames
by a screw or other fastening, and at the sides of the suspending frames
are fastened hard steel pieces & for the pivots to work against as the
beam oscillates. The bearings are made of circular pieces of hard
steel or hard stone, Figs. 2, 3, and 4, or rectangular, as at m, Figs. 5
and 6, or octagonal, as at n, Fig. 7, or they may be oval, hexagon, or
other polygon shapo. I also fix bearings of steel in the sides of the
pedestal, as at o, Fig. 8.
I modify these arrangements by placing each bearing in a single
block or pedestal, which is afterwards fastened to its corresponding
side of the suspending frame, there being at both sides hard steel pieces
for the ends of the pivots to work against, and I also apply similar
pedestals to those before described to counter and other weighing
machines.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent;
filed by the said William Donbavand in the Great Seal Patent
Office on the 10th May 1870..
L
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
DONBAVAND, of the City of Manchester, in the County of Lancaster,
Scale Beam and Weighing Machine Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of November, in the
year of our Lord One thousand eight hundred and sixty-nine, in the
thirty-third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Donbavand, Her special
licence that I, the said William Donbavand, my executors, adminis-
trators, and assigns, or such others as I, the said William Donbavand;
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN BALANCES FOR WEIGHING," upon the condition
(amongst others) that I, the said William Donbavand, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same, was
to be performed, and cause the same to be filed in the Great Scal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Donbavand, do hereby:
declare the nature of my said Invention, and in what manner the same.
is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say) :-
'
This Invention relates to the suspending frame and bearings for the
central pivots of the beam, and also to the suspending frames to which
the scales are connected, and consists in improved: constructions and
arrangements of pedestals applied to the suspending frames. The'
pedestals are made with different cavities, in which hard steel.or.
hard stone bearings are placed for the beam pivots or knife edges to

page_text: move on, the object being to effect economy in the manufacture and
enable the parts to be separated and cleaned with ease and despatch,
and I also apply similar suspending frames and pedestals to platform,
counter, and other weighing machines.
The manner in which this Invention is to be performed will be
clearly understood by the following particular description thereof,
reference being had to the figures and letters on the accompanying
two Sheets of Drawings, in which Fig. 1 is an elevation of a scale
beam and suspending frames provided with one arrangement of my
improvements; Figs. 2 and 3 are vertical sections of the central
suspending frame, pedestal, and bearings; Fig. 4, a sectional plan of
the same; Figs. 5 and 6, vertical sections of one of the end suspending
frames, pedestals, and bearings; Figs. 7, 8, 9, and 10, sectional plans
of different forms of bearings; Figs. 11, 12, 13, 14, 15, and 16,
vertical sections representing certain modifications in the bearings and
other parts of the suspending frames; Fig. 17, a longitudinal elevation
of a steelyard, having one arrangement of my improved suspending
frames; Fig. 18 is a longitudinal clevation of a scale beam having
one of my improved central suspending frames and a modified form of
end suspending frames; and in Figs. 19 and 20 I represent an improved
form of bearings.
In the arrangement shewn in Figs. 1 and 3, a represents the
beam of the balance entire and in section; b, the central pivots;
c, Figs. 1, 2, 3, 4, the central suspending frame; d, the bearings which
support the central pivots; e, Figs. 1 and 6, the end pivots; f,
Figs. 1, 5, and 6, the end suspending frames; and g the bearings
which bear on the pivots. In one arrangement of the central and end
suspending frame I form the cavities for the two bearings of each
frame in one block or pedestal h, Figs. 1, 2, 3, 4, 5, and 6, held to the
frame by a screw i or other fastening, and at the inner sides of the
suspending frames are fastened hard steel pieces k for the pivots to
work against as the beam oscillates. The bearings d, Figs. 1, 2, 3,
and 4, and g, Figs. 5 and 6, are made of circular pieces, of hard steel or
hard stone, or they are formed rectangular, as at m, Figs. 7 and 8, or
octagonal as at n, Fig. 9, or they may be oval, hexagon, or other
polygon shape, and, when desired, I dispense with the cavities, and fix
bearings in the sides of the pedestals, as at o, Fig. 10.

page_text: I modify these arrangements by placing each bearing of the central
and end suspending frames in a single block or pedestal screwed or
otherwise fastened to its corresponding side of the suspending frame,
there being at both ends of the bearings hard steel or case hardened iron
pieces for the ends of the pivots to work against, and Figs. 11 and 12
are vertical sections of a central suspending frame constructed according
to this modification; p being the frame; q, the single blocks or
pedestals; r, the bearings; and 8, the steel plates; and the pedestals,
bearings, and steel plates of the end suspending frames are made in a
similar manner.
In Figs. 1, 2, 3, 4, 5, and 6, the blocks or pedestals h, having each
two bearings for the pivots to work on are fixed to the frames c by the
screws i, but it is evident that there are various ways for accomplishing
this object, and in Figs. 13, 14, 15, and 16, I shew another mode of
fixing the blocks or pedestals to the central and end suspending frames
and attaching the steel pieces for the pivots to work against. The
lower end of each central and upper end of each end suspending frame t
is reduced in thickness, and to this part is fixed a block or pedestal of
one piece, but having two sides & in which are fitted the bearings v, and
to the sides of the frame are screwed the steel pieces to having projections
for the ends of the pivots to work against, and it is evident that tho
part of the pedestal and frame to which it is fixed can be made of any
desired shape.
In Fig. 17 I represent the application of one arrangement of my,
improved suspending frames to the steelyard of a platform or other
weighing machine, the frame y being similar to that shewn in Figs. 11
and 12, and the frame corresponding with a similar end suspending
frame of a scale beam. In Fig. 18 the scale beam is supported by a
central suspending frame similar to that shewn in Figs. 11 and 12,
but the end suspending frames a¹ are so formed that they can be
readily placed on and taken off the end pivots as required; and in
Figs. 19 and 20 I shew an improved form of agate or other hard stone
bearings.
Having now described the nature and particulars of my said Inven-
tion, and the manner in which the same is to be performed, I desire
it to be understood that in balances for weighing I claim, the improved
constructions and arrangements of suspending frames and pedestals,

page_text: and also the improved hard steel or hard stone bearings for the beam
pivots or knife edges to work on, as all such improvements are herein
described and illustrated in the accompanying two Sheets of Drawings.
In witness whereof, I, the said William Donbavand, have here-
unto set my hand and seal, this Ninth day of May One thousand
hundred and seventy.
Witness to the mark of the said
William Donbavand,.
WILLIAM DONBAVAND + (L.S.)
G. SEPTIMUS HUGHES,
Patent Agent,
mark.
Manchester..