IMPROVEMENTS IN SPRING WEIGHING SCALES
Year: 1870

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, for the Invention of
"IMPROVEMENTS IN SPRING WEIGHING SCALES."-A communication from
abroad by Jean Victor Mathivet, of Cleveland, Ohio, United States
of America.
Sealed the 25th November 1870, and dated the 6th October 1870.
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 6th October 1870, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the International Patent Office," Southampton
66
Buildings, London, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN SPRING WEIGHING SCALES," and have petitioned Her Majestyt o grant
unto me, my executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that it has

page_text: been communicated to me from abroad by Jean Victor Mathivet, of
Cleveland, Ohio, United States of America.
NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and seal, fully
describes and ascertains the nature of the said Invention, and in what
manner the same is to be performed, in and by the following statement,
reference being had to the accompanying Drawing forming part of this
Specification.
This Invention relates to improvements in spring balances or scales
which indicate weight by an index pointer whereby the exact weight of
two articles on the platform may be indicated at one and the same time.
The said improvements consist in the addition of a loose pointer which
is placed on the same spindle has the fixed pointer, and is counterpoised
by a weight so that it shall stand perpendicularly indicating nothing,
but which is capable of being adjusted at any time so that it shall turn
with the spindle and be made to indicate the weight of a second article
on the scales.
Figure 1 is a front view of a spring balance with these improvements
applied to it; Figure 2 is a section shewing the manner of attaching the 2
aforesaid adjustable second pointer.
A is a dial of the ordinary kind attached to a spring balance which
may be of any of the known forms, and which has attached to the
spindle c a fixed pointer a. The said spindle is operated by a spring
affected by the weight of the article on the platform D. The end of the
spindle c is extended by screwing into it a pine which is made slightly
taper with the largest end next to the spindle. Fitting on the pin e is
the sleeve i of the loose pointer B, which has a counterpose weight b.
The object of making the pin e taper is that when the sleeve i is pushed
on it the pointer will be fixed and will turn with the spindle, otherwise
when the sleeve sits loosely on the pin the pointer B will be caused to
stand perpendicular by the counterpoise weight b. The pin e has a head.
on it or a small pin through it to prevent the pointer from slipping off.
A small guard h is placed on the pointer B over the end of the pin c
which may be used as a handle for pushing or drawing the pointer for
tightening and loosening it on the pin.

page_text: The operation of these improvements is as follows:-For instance,
it is desired to ascertain the weight of some article which must be
contained in a vessel, such as butter; the dish is placed on the platform
of the scale or balance, and the fixed pointeri ndicates its weight, which
may be some fractional weight, but the operator need pay no attention to
this, he simply fixes the loose pointer now by touching the guard h,
pushing the pointer B tightly on the pin e, when he may take the dish
away and fill it; then by replacing it on the platform the now fixed
pointer B indicates the exact weight of the contents, thus obviating the
necessity of figuring the difference between the weight of the dish and
the aggregate weight of both to find the weight of the contents. The
apparatus is therefore perfectly reliable, being both quick and certain.
The fixed pointer a might be dispensed with entirely, as the pointer B can
be fixed and used as such in all cases when a single article is to be
weighed, and when two are to be weighed the pointer can be loosened;
then when the dish is on the platform it may be fixed, the contents then
only will be indicated, it being unnecessary to know the weight of
the dish.
Having thus fully described the said Invention as communicated to
me by my foreign correspondent, I wish it understood that I claim the
weighted pointer B, b, i, so constructed and fitted to the spindle c, e,
that it may retain its vertical position independent of the spindle, and by
a simple adjustment may be made to turn therewith as herein set forth
for the purpose described.
In witness whereof, I, the said George Haseltine, have hereunto set
my hand and seal, this Sixth day of October, in the year of our
Lord One thousand eight hundred and seventy.
GEORGE HASELTINE. (L.S.)
Witness,
W. ROB. LAKE.