IMPROVEMENTS IN THE MEANS OR APPARATUS EMPLOYED FOR TRANSMITTING MOTION TO STONE BREAKERS AND OTHER MACHINERY
Year: 1878

page_text: LETTERS PATENT to William Henry Baxter, of Leeds, in the County of York,
for the Invention of "IMPROVEMENTS IN THE MEANS OR APPARATUS EMPLOYED
FOR TRANSMITTING MOTION TO STONE BREAKERS AND OTHER MACHINERY.”
PROVISIONAL SPECIFICATION left by the said William Henry Baxter at the
Office of the Commissioners of Patents on the 4th October 1878.
WILLIAM HENRY BAXTER, of Leeds, in the County of York. "IMPROVEMENTS
IN THE MEANS OR APPARATUS EMPLOYED FOR TRANSMITTING MOTION TO STONE
BREAKERS AND OTHER MACHINERY."
My Invention has for its object the production of means for transmitting motion
whereby the strain upon or power required from the prime mover is reduced, and
the working of machines more easily effected.
This Invention is particularly applicable to machines known as "Blake's" stone-
breaking machine, but it is also applicable as an intermediate arrangement for
transmitting motion between prime movers and other machinery, reducing the
power required from such prime mover in working the machines. Blake's" stone-
breaking machine is actuated directly from a crank or eccentric, and consequently
requires a large amount of power to move it when working.
In my arrangement I employ between the eccentric or crank a radial arm having
one rod coupling the outer end to the "toggles," such "toggles" being of ordinary
construction, and at or near the same point of connection on the radial arm I
couple another connecting rod, which is engaged with the crank or eccentric.
The crank or eccentric imparts when in motion a radial reciprocating motion to
the radial arm, moving it thereby by preference right and left at its top centre,
which movement imparts the desired motion to the "toggles" of the stone-breaking
machine. A wedge-like movement being produced by the arm moving in the
manner described, much less power for working the machine is required than when
the ordinary direct action is employed for transmitting motion. This arrangement
of radial arm may be employed for transmitting motion to other machinery.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Henry Baxter in the Great Seal Patent Office on the 31st
March 1879.
WILLIAM HENRY BAXTER, of Leeds, in the County of York.
"IMPROVEMENTS
IN THE MEANS OR APPARATUS EMPLOYED FOR TRANSMITTING MOTION TO STONE
BREAKERS AND OTHER MACHINERY."
My Invention has for its object the production of a means for transmitting motion
whereby the strain upon or power required from the prime mover is reduced, and
the working of machines more easily effected.
This Invention is particularly applicable to machines known as "Blake's " stone-
breaking machine," but it is also applicable as an intermediate arrangement for
transmitting motion between prime movers and other machinery, reducing the
power required from such prime movers in working the machines. "Blake's" stone-
breaking machine is actuated directly. from a crank or eccentric, and consequently
requires a large amount of power to move it when working.
In my arrangement I employ between the eccentric or crank or radial arm having
one rod coupling the outer end to the "toggles," such "toggles" being of ordinary
construction, and at or near the same point of connection on the radial arm I
couple another connecting rod, which is engaged with the crank or eccentric.
The crank or eccentric imparts when in motion a radial reciprocating motion to
the radial arm, moving it thereby by preference right and left at its top centre,
which movement imparts the desired motion to the "toggles" of the stone-breaking
machine. A wedge-like movement being produced by the arm moving in the
manner described, much less power for working the machine is required than when
the ordinary direct action is employed for transmitting motion.
•
This arrangement of radial arm may be employed for transmitting motion to other
machinery.
And in order that my Invention may be more completely understood, reference
A
looking at the top.
In the accompanying Sheet of Drawings I have illustrated my Invention applied
to a single stone-breaking machine, but I wish it to be distinctly understood that
the Invention is equally applicable to double or compound machines.
is the framework of the machine; b, the jaw; o, the corrugated plate in front
of the jaw; between this corrugated plate c and the jaw b the crushing or breaking
operation takes place; c and d are the arrangement of "toggles," all of which are
of ordinary construction.
In order to give the required motion to the jaw b I mount the crank shaft or.
eccentric e in bearings f on the framework a, and convey motion therefrom to a
radial arm or moveable fulcrum or lever g (which is supported at h on the frame
work a) by means of rod g¹. To the upper end i of the radial arm, moveable fulcrum,
or lever gare attached the "toggles" connecting or supporting rod or rods j. By
giving a rotary motion to the crank shaft or eccentric e a radial reciprocating motion
is imparted to the radial arm, moveable fulcrum, or lever g, and during this move-
ment of passing over its centre the "toggle" rod or rods ; are lifted and lowered,
thus giving the desired motion to the "toggles" d and d', thence to the jaw b. The
incline and bolt ¹ are of ordinary construction, and are employed to adjust the
jaw. The rod and plate m attached to the radial arm, moveable fulcrum, or
lever 9 is to transmit the return motion to the jaw b. Motion is imparted to

page_text: the machine from some suitable motor through driving pulley n, assisted by fly
wheels o.
I find by experiment that one great improvement achieved for transmitting
motion to the jaws of stone breakers is that instead of a slow crushing motion a
hammer-like blow is given to the material, which more quickly and effectually
breaks the stone; also much less power is required for working the machine. By
increasing the length of the back toggle and shortening the front toggle
the motion of the jaw b is increased. This arrangement of radial arm, moveable
fulcrum, or lever g may be applied to other machinery requiring a similar motion.
Having now described the nature of the said Invention, and described by the aid
of Drawings how the same may be carried into practice, I would have it understood
that I do not limit myself to the exact details or configuration of the parts I have
described and illustrated on the accompanying Sheet of Drawings, as the same may
be varied or modified without departing from the nature or principle of my Inven-
tion, but what I do claim and desire to be secured to me by Letters Patent is,-
First. The arrangement, construction, and application of radial arm, moveablo
fulcrum, or lever g, and parts connected therewith, for transmitting motion to stone
breakers and other machinery, substantially as and for purposes herein set forth.
Second. The combination of the various parts forming the apparatus, substantially
as and for purposes herein set forth.
In witness whereof, I, the said William Henry Baxter, have hereunto set my
hand and seal; this Twenty-eighth day of March, in the year of our Lord One
thousand eight hundred and seventy-nine.
WILLIAM HENRY BAXTER. (L.S.)