IMPROVEMENTS IN SELF-INDICATING WEIGHING AND STRAIN-TESTING MACHINERY
Year: 1872

page_text: LETTERS PATENT to James Vivian, of Falmouth, in the County of
Cornwall, Engineer, and Henry Somerset Mackenzie, of the same
Place, Steamship Owner, for the Invention of "IMPROVEMENTS IN
SELF-INDICATING WEIGHING AND STRAIN-TESTING MACHINERY,"
PROVISIONAL SPECIFICATION. left by the said James Vivian and
Henry Somerset Mackenzie at the Office of the Commissioners of
Patents, with their Petition, on the 2nd November 1872.
We, JAMES VIVIAN, of Falmouth, in the County of Cornwall, Engineer,
and HENRY SOMERSET MACKENZIE, of the same Place, Steamship
Owner, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN SELF-INDICATING WEIGHING AND STRAIN-TESTING MACHINERY,'
to be as follows:-
:-
"
This Invention consists in employing two metallic caps into which a
metallic ring is accurately fitted, thus forming a chamber for fluid. so
arranged that the approach of these caps shall indicate by means of a
pressure guage the weight or the strain applied; making a very light

page_text: and convenient weigher or strain-tester very different to those hitherto
adopted.
The caps above-named are made to work perfectly true over an
internal ring, their faces being kept parallel by means of connecting
rods with cross heads passing through the metal of one cap into and
fixed to that of the opposite cap, or by means of an internal tube
bolt and T headed guide bolt, the latter passing through the former
and being attached to a suitable shackle, which is screwed on to it on
the outer side of one of the caps, the tube itself being screwed into the
centre of the same cap and having at the other end end outside the centre
of the opposite cap a suitable shackle of such form as to admit of the
insertion of the T headed guide bolt which holds the entire machine
together.
The internal ring may be constructed with flanges and wedges which
enable it to be bolted very accurately so that no elastic material is
required to prevent leakage, though this may be employed if thought
necessary.
The caps may either be pressed together by means of a link attach-
ment, or drawn together by the connecting rods and cross head pieces
or the tube and guide bolt with their shackles, as desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Vivian and Henry Somerset Mackenzie in
the Great Seal Patent Office on the 2nd May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
VIVIAN, of Falmouth, in the County of Cornwall, Engineer, and HENRY
SOMERSET MACKENZIE, of the same Place, Steamship Owner, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of November, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said James Vivian and Henry Somerset
Mackenzie, Her special licence that we, the said James Vivian and
Henry Somerset Makenzie, our executors, administrators, and assigns,

page_text: <<
or such others as we, the said James Vivian and Henry Somerset
Mackenzie, our executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 SELF-INDICATING WEIGHING AND STRAIN-TESTING MACHINERY,"
upon the condition (amongst others) that we, the said James Vivian
and Henry Somerset Mackenzie, our executors or administrators, by an
instrument in writing under our, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said In-
vention, 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 we, the said James Vivian and Henry Somerset
Mackenzie, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The nature and object of the said Invention comprehend the employ-
ment of two metallic (or other suitable) caps or cups into which a
metallic (or other suitable) belt or ring is accurately fitted, thus forming
a chamber for the reception of fluid, so arranged that the approach of
these caps or cups shall indicate by means of a pressure guage the
weight or the strain applied, making a very light and convenient weigher
or strain-tester very different to those hitherto adopted.
DESCRIPTION OF THE DRAWINGS ACCOMPANYING THIS SPECIFICATION.
In these Drawings the caps or cups a above-named are made, as
indicated, to work perfectly true over the internal belt or ring b, their
faces being kept parallel by means of, firstly (as in Drawing No. 1), an
internal guide tube bolt d, and a T headed centre bolt e, the latter
passing through the former and being attached to a suitable shackle f
which is screwed on to it on the outer side of one of the caps or cups (a),
the guide tube (d) itself being screwed into the centre of the opposite
cap or cup (a), and having at its other end and outside the centre of
the opposite cap or cup (a) a suitable shackle (f) of such form as to
admit the insertion of the T headed central bolt (e) which holds the

page_text: cr
Having now particularly described and ascertained the nature and
object of our said Invention and in what manner the same is to be
performed, or put in practice, we hereby declare that we claim the
herein described Invention of Improvements in Self-indicating
Weighing and Strain-testing Machinery," wherein the adaptation and
use of the above-mentioned caps or cups, and the internal belt or ring
constitute principal features of the Invention claimed by us.
It being
understood that we do not limit ourselves to the precise details of con-
struction shewn by the Drawings, and herein described, as there are
various other methods of construction of our machinery which might
possibly be adopted without departing from the nature and principles of
the said Invention.
In witness whereof, we, the said James Vivian and Henry Somerset
Mackenzie, have hereunto set our hands and seals, this Thirtieth
day of April, in the year of our Lord One thousand eight
hundred and seventy-three.
0
JAMES VIVIAN.
(L.S.)
Witness,
RICHARD VIGURS,
Falmouth.
H. SOMERSET MACKENZIE. (L.S.)