IMPROVEMENTS IN MECHANISM FOR STOPPING AND .SETTING MACHINERY IN MOTION
Year: 1879

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LETTERS PATENT to Julius Hall, of 90, Chancery Lane, London; Patent Agent,
'for the Invention of "IMPROVEMENTS IN MECHANISM FOR STOPPING AND
.SETTING MACHINERY IN MOTION." A communication from abroad by Alfred;
Godfrey, of Brooklyn, Long Island, United States of America.
f
Sealed the 13th February 1880, and dated the 18th August 1879
PROVISIONAL SPECIFICATION left by the said Julius Hall at the Office of the
Commissioners of Patents on the 18th August -1879.
JULIUS HALL, of 90, Chancery Lane, London, Patent Agent.
" IMPROVEMENTS'
IN MECHANISM FOR STOPPING AND SETTING MACHINERY IN MOTION." [A com-:
munication from abroad by Alfred Godfrey, of Brooklyn, Long Island, United States.
of America.]
This Invention relates to an improved method for stopping and setting machinery
in motion by instantaneously relieving or attaching the machinery from the driving
and fly wheels without loosing any of its momentum or energy when once the
driving wheel is set in motion.
For this purpose I fit the fly wheels of steam engines and other kinds of
machinery to their shafts so as to be capable of revolving freely on the same. I'
provide such fly wheels on one of its sides with a boss projecting therefrom soine-
what more than is now usual. I turn such boss perfectly circular and true with'
the bore of the wheel, and fit thereon an expanding metal strap or band having at
one point of its circumference an opening, each edge of which is provided with a lug
projecting outwards, the said lugs being so arranged as always to have a narrow
opening between them. Through both lugs is passed a screw bolt, which also takes'
into an internally screwed boss of a short lever, and is by such means caused to
tighten up or slack out the lugs, and consequently the expanding band. The
opposite extremity of the short lever is connected by means of another and longer
lever to a collar sliding freely on a sleeve keyed on to the fly wheel shaft'; on the'
outer circumference of the collar is formed a groove or recess, and by means of a
lever, the forked end of which takes into the said groove the said collar, is, and with
it the two aforesaid levers, is actuated and caused to tighten up or slack out the
expanding band on the boss of the fly wheel. One end of the sleeve referred to
also passes over the greater portion of the outer circumference of the expanding
band, a projection or lug on this latter. fitting into a corresponding recess in the
sleeve so as to retain the expanding band in close and firm contact with the said
sleeve.
When the expanding band is tightened up the fly wheel revolves with the shaft,
and when slacked out the fly-wheel runs free-on-the-shaft, from which the
momentum is thereby immediately taken and the machinery, especially in the
case of single cranks, immediately stopped.
'

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Julius Hall in the Great Seal Patent Office on the 17th February
1880.
"
JULIUS HALL, of 90, Chancery Lane, London, Patent Agent. IMPROVEMENTS
IN MECHANISM FOR STOPPING AND SETTING MACHINERY IN MOTION." A com-
munication from abroad by Alfred Godfrey, of Brooklyn, Long Island, United States
of America.
This Invention relates to an improved method for stopping and setting machinery
in motion by instantaneously relieving or attaching the machinery from the driving
and fly wheels without losing any of its momentum or energy when once the
driving wheel is set in motion.
1
For this purpose I fit the fly wheels of steam engines and other kinds of
machinery to their shafts so as to be capable of revolving freely on the same. I
provide such fly wheels on one of its sides with a hub B projecting therefrom some-
what more than is now usual. I turn such hub perfectly circular and true with
the bore of the wheel, and fit thereon an expanding metal strap or band C, having
at one point of its circumference an opening, each edge of which is provided with a lug
projecting outwards c', c¹, the said lugs being so arranged as always to have a
Darrow opening between them. Through both lugs is passed a screw bolt E, which
also takes into an internally screwed boss of a short lever F, and is by such means
caused to tight up or slack out the lugs C, C, and consequently the expanding
band C. The opposite extremity of the short lever is connected by means of
another and longer lever G, Figure 2, to a collar H, Figure 2, sliding freely on a
sleeve D keyed on to the fly wheel shaft A.; on the outer circumference of the
collar H, Figure 2, is formed a groove or recess H¹, and by means of a lever, the.
forked end of which takes into the said groove of the said collar H, and with it
the two aforesaid levers F, G, actuated and caused to tighten up or slack out the
expanding band on the hub of the fly wheel. One end of the sleeve referred to also
passes over the greater portion of the outer circumference of the expanding band;
a projection or lug C on this latter fitting into a corresponding recess in the sleeve
so as to retain the expanding band in close and firm contact with the said sleeve.
When the collar H is moved in the direction of the arrow, Figure 2, the nut
or lever F will partly turn round on the bolt E, thus allowing the band C to
expand, and so release the hub B of the fly heel, and allowing it to revolve on
the shaft A freely, thereby stopping the machinery instantly.
•
Having now described and ascertained the nature of my said Invention, and
the manner in which the same is or may be performed, I would observe in con-
clusion that I do not limit myself to the precise details herein given and shewn on
the accompanying Drawings, as various modifications may be made therein while
retaining the essential features of the said Invention, but what I claim as new, and
desire to be secured to me by the hereinbefore in part recited Letters Patent is, the
application or method of stopping and setting machinery in motion without stopping
or losing the momentum of the driving wheel and band in combination with parts
'herein before described and illustrated by letters A, B, C, D, E, F, G, and H, or any
modification thereof.
In witness whereof, I, the said Julius Hall, have hereunto set my hand and
seal, this Sixteenth day of February, in the year of our Lord One thousand