AN IMPROVED BALANCE BEAM AND MACE FOR SECURING THE STEADY BALANCING AND DRIVING OF MILLSTONES
Year: 1879

page_text: LETTERS PATENT to Anthony Stevenson, of 24, Queen Street, in the City of
Chester, Millwright, for the Invention of "AN IMPROVED BALANCE BEAM AND
MACE FOR SECURING THE STEADY BALANCING AND DRIVING OF MILLSTONES."
Sealed the 24th October 1879, and dated the 3rd May 1879.
PROVISIONAL SPECIFICATION left by the said Anthony Stevenson at the
Office of the Commissioners of Patents on the 3rd May 1879.
ANTHONY STEVENSON, of 24, Queen Street, in the City of Chester, Millwright.
"AN IMPROVED BALANCE BEAM AND MACE FOR SECURING THE STEADY BALANCING
AND DRIVING OF MILLSTONES."
Instead of the ordinary square ends of the balance beam by which it is secured
to the runner millstone I make these ends round and truly turned, and to these
ends I fit two blocks of iron or other suitable material. These blocks are rigidly
secured to the runner millstones in such a manner as to allow it to oscillate on
the turned ends of the balance beam. The mace I then make to fit accurately the
sides of the balance beam without the usual allowance of play, which is necessary
where the beam is rigidly fixed in the runner stone.
The beam in other respects is mounted in the usual manner upon the cockhead.
By this Invention the runner stone is supported upon a simple system gimbals,
and is thus able to assume any position demanded by the work or the balance of
the stone.
:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Anthony Stevenson in the Great Seal Patent Office on the 3rd
October 1879.
"
ANTHONY STEVENSON, of 24, Queen Street, in the City of Chester, Millwright.
AN IMPROVED BALANCE BEAM AND MACE FOR SECURING THE STEADY BALANCING
AND DRIVING OF MILLSTONES."
Instead of the ordinary square ends of the balance beam by which it is secured
to the runner millstone I make these ends round and truly turned, and to these
ends I fit two blocks of iron or other suitable material. These blocks are rigidly
secured to the runner millstone in such a manner as to allow it to oscillate upon
the turned ends of the balance beam. The mace I then make to fit accurately the
sides of the balance beam without the usual allowance of play, which is necessary
where the beam is rigidly fixed in the runner stone.
The beam in other respects is mounted in the usual manner upon the cock head.
By this Invention the runner stone is supported upon a simple system of gimbals,
and is thus able to assume any position demanded by the work or the balance of
the atone
Figure 1 shews a side elevation of the arrangement of my improved balance
beam and mace as set in the runner millstone.
Figures 2 and 3 show respectively a side view and plan to a larger scale;
Figures 4 and 5 show transverse sections taken respectively on the lines X, X,
and Y, Y.
A is the balance beam, the ends of which at B, B, are turned to fit the blocks
C, C, which are securely and rigidly fixed in the runner stone R.
D, D, are the surfaces on the balance beam which are made to fit accurately the
jaws of the mace E. The balance beam A is supported in the usual manner upon
the cock head G on the extremity of the mill spindle H.
The runner stone by these improvements is thus perfectly free to assume any
position demanded by the work without the slightest play in the direction of the
strain of driving, so that no back lash can affect the stones at that point, and when
once the stone is put to a standing balance the driving strain (then applied through
the improved balance beam and mace) in no way interferes with it. Having thus
described the nature of my Invention and in what manner the same is to be per-
formed, I claim the improved balance beam and mace, substantially as herein set
forth.
In witness whereof, I, the said Anthony Stevenson; have hereunto set my
hand and seal, this Thirty first day of October, in the year of our Lord
One thousand eight hundred and seventy nine.