IMPROVEMENTS IN SCALE BEAMS AND WEIGHING MACHINES
Year: 1861

page_text: LETTERS PATENT to Henry Pawson, of 117, Leadenhall Street, in the City
of London, for the Invention of "IMPROVEMENTS IN SCALE BEAMS AND
WEIGHING MACHINES."
Sealed the 9th July 1861, and dated the 11th January 1861.
PROVISIONAL SPECIFICATION left by the said Henry Pawson at the
Office of the Commissioners of Patents, with his Petition, on the
11th January 1861.
I, HENRY PAWSON, of No. 117, Leadenhall Street, in the City of London,.
do hereby declare the nature of the Invention for "IMPROVEMENTS IN SCALE
BEAMS AND WEIGHING MACHINES," to be as follows:-
This Invention has for its object improvements in scale beams and weighing.
machines. For these purposes, in order to retain the knife edges correctly in
position on the flat bearings used in weighing machines and scale beams, the
knife edge has two conical pins applied near its ends, and the points of such
pins coincide with the knife edge or edges when more than one is used. The
knife edge or edges, as heretofore, rest on a flat plate or bearing, at one end of
which is formed or fixed a conical cup to receive one of the conical pins, and
an angular groove is formed on or affixed to the other end of such bearing, in
order to receive the other conical pin. The bottom of the cup and the bottom
of the angular groove come slightly below the surface of the flat bearing, so
that the points do not bear thereon when the knife edge or edges is or are
resting on the flat bearing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Pawson in the Great Seal Patent Office on the 11th
July 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
PAWSON, of 117, Leadenhall Street, in the City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of January, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Henry Pawson, Her special licence that I, the said Henry Pawson, my
executors, administrators, and assigns, or such others as I, the said Henry
Pawson, my executors, administrators, and assigns should at any time agree
with, and no others, from time to time and at 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 SCALE BEAMS
AND WEIGHING MACHINES," upon-the-condition_(amongst others) that I, the
said Henry Pawson, 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
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Henry Pawson, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
This Invention has for its object improvements in scale beams and weighing
machines. For these purposes, in order to retain the knife edges correctly in
position on the flat bearings used in weighing machines and scale beams, the
knife edge has two conical pins applied near its ends, and the points of such
pins coincide with the knife edge or edges when more than one is used. The
knife edge or edges, as heretofore, rest on a flat plate or bearing, at one end of
which is formed or fixed a conical cup to receive one of the conical pins, and
an angular groove is formed on or affixed to the other end of such bearing, in
order to receive the other conical pin. The bottom of the cup and the bottom
of the angular groove come slightly below the surface of the flat bearing, so

page_text: that the points do not bear thereon when the knife edge or edges is or are
resting on the flat bearing.
Having thus stated the nature of my Invention I will proceed more fully
to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a portion of the standard of a weighing machine; Figure 2
shews a section through the dotted line a, b, Figures 1 and 3; Figure 3 shews
a plan, and Figure 4, an end view of the surface on which the knife edge
rests; Figure 5 shews a side view of part of the beam, the end thereof, which
is shewn being partly in section, in order that the manner of fixing the knife
edge may be clearly shewn; Figure 6 shews another view of the end of
the beam shewing the means of adjusting the knife edge; Figure 7 shews a
side view of the knife edge, with its conical points in the form used at the
ends of the beam; Figure 8 is a plan of the end of the beam; Figure 9
shews a transverse section of the beam taken at c, d, in Figure 5; Figure 10
shews stirrup, to hang the scale on to the end of the beam.
In the arrangement shown the beam has affixed to it the knife edge, and it
moves on the surface fixed to the standard, whilst the knife edges for e scales
are fixed on the ends of the beam, and the plate or surface which acts there-
with is fixed in the stirrups to which the scales are hung; but these arrange-
ments may be varied in constructing other weighing machines and scale
beams; d is the knife edge, having two conical pins e, e, applied thereto; f is
the flat bearing plate, having at one end a conical cup 9, and at the other end an
angular groove h, into which the two conical pins e, e, enter, but they do not
quite touch the bottoms of the groove and cup. The other parts shewn by the
Drawings are of the ordinary construction. The peculiarity consists in the
combination of the parts d, e, f, g, and h.
In witness whereof, I, the said Henry Pawson, have hereunto set my
hand and seal, this Eleventh day of July, in the year of our Lord
One thousand eight hundred and sixty-one.
HENRY PAWSON. (L.S.)