IMPROVEMENTS IN FRICTION GEARING
Year: 1879

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for the Invention of "IMPROVEMENTS IN FRICTION GEARING."
A communication from abroad by Luigi dei Marchesi Biscaccianti della Fonte
o Fonti, of Rome, in the Kingdom of Italy.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 26th June 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN FRICTION GEARING." A communication from abroad by Luigi dei Marchesi
Biscaccianti della Fonte o Fouti, of Rome, in the Kingdom of Italy.
The Invention consists in inserting several rollers between the nave of a wheel
or pulley and its axle, or between a shaft and its bearing, each roller being made
the length of the nave or bearing, and provided at each end with a toothed cylinder
having teeth arranged obliquely and in opposite directions, and which gear into the
axle or shaft as well as in the internal surface of the nave or bearing. When the
wheel, pulley, or other object treated rotates, it sets all rollers in revolution, the
motion of the rollers in relation to the surface of the nave or journal being
analogous to that of a cylinder which rolls freely upon a plane. The rollers are
inserted through a lateral opening in the nave or bearing, which is subsequently
firmly closed by a cover, and all parts may be made of metal.

page_text: -
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the 19th
December 1879.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN FRICTION GEARING." A communication from abroad by Luigi dei
Marchesi Biscaccianti della Fonte o Fonti, of Rome, in the Kingdom of Italy.
The Invention consists in inserting several rollers between the nave of a wheel
or pulley and its axle, or between a shaft and it bearing,, each roller being made
the length of the nave or bearing, and provided at each end with a toothed
cylinder, having teeth arranged obliquely and in opposite directions, and which
gear into the axle or shaft, as well as in the internal surface of the nave or bearing,
or of the bushes with which the nave or bearing is provided. When the wheel,
pulley, or other object treated rotates, it sets all rollers in revolution, the motion of
the rollers in relation to the surface of the nave or journal being analogous to that
of a cylinder which rolls freely upon a plane. The rollers are inserted through a
lateral opening in the, nave, bush, or bearing, which is subsequently firmnly closed
by a cover, or the nave or bush may be made in segments, and all parts may be
made of metal. In the accompanying Drawings, which serve to illustrate the
Invention, Fig. 1 is a front elevation of mechanism showing a sleeve or bush with
axlo and friction rollers, and Fig. 2 a plan with the sleeve or hollow cylinder
partly removed; while Figs. 3, 4, and 5 show detail views of friction roller, axle,
and sleeve, Figs. 3 and 4 being side elevations, and Fig. 5 an axial section. A is
the axle; B are friction rollers; C is the bush or hollow cylinder, shown made of
two pieces, and carrying the external rolling surface, and m, m, m, m, is a cover or
slide for introducing the friction rollers. When the bush C is otherwise of one
piece, the cylinders B are always in contact with the shaft A, as well as with the
interual surface of C along their respective generating lines. This axle A is a
cylinder made hollow so as to fit upon ordinary axles. In order to keep the rolling
surfaces always oiled, two metal rings D. may be fixed on the ends of the cylinder C,
and provided with packing rings E of leather or other suitable material; so as to
prevent the escape of oil. The said metal rings may also serve, if, necessary, to
prevent any motion of the rollers B parallel with the axis of the wheel; in which
case the rollers B will be provided with rounded steel heads. To set the meclianism
in working order, the door m, m, m, m, is removed, and the rollers placed in in their
relative positions, which they will always retain by reason of the toothed part of
their surface as above described: After the door m, m, has been replaced in its
former position, the hollow cylinder or bush C, C, is rigidly attached to the wheel.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Nineteenth day of December, A.D. 1879.
TT T
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