An Improved Arrangement of Antifriction Rollers in Sheaves.
Year: 1892

page_text: Date of Application, 15th Oct., 1892
Complete Specification Left, 11th July, 1893-Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Arrangement of Antifriction Rollers in Sheaves.
MYLES O'HARA REILLY of 1 Thorndale Terrace Belfast Ireland Draughtsman
and WILLIAM CAMPBELL of 78 Duncairn Gardens Belfast Ireland Pattern Maker,
do hereby declare the nature of this invention to be as follows:-
This improved arrangement of antifriction rollers in sheaves consists in the
introduction of a stationery bush on the pin of the sheave this bush is flanged and
the axles of the antifriction rollers roll thereon the major diameter of the anti-
friction rollers support the outer ring or sheave proper.
To prevent the contact of the surfaces of the antifriction rollers which move in
opposite directions the axles thereof may be kept apart by guides or keys which
would move round the stationery bush with the antifriction rollers.
By the difference in diameter of the antifriction rollers and their axles and the
surfaces thereof being kept apart a free moving sheave is obtained which is not
liable to wear flats upon the pin or antifriction cylinders and balls of the ordinary
antifriction rollers in sheaves used for heavey loads and where lubrication is
impossible.
It is desirable that the outer diameter of the flange should bear the same ratio
to the axles of the antifriction rollers as the internal diameter of the sheave bears
to the major diameters of the antifriction rollers as by this means all sliding or
rubbing motion is avoided.
Dated this 14th day of October 1892.
MYLES O'HARA REILLY.
WILLIAM CAMPBELL.
COMPLETE SPECIFICATION.
An Improved Arrangement of Antifriction Rollers in Sheaves.
MYLES O'HARA REILLY of 1 Thorndale Terrace Belfast Ireland Draughtsman
and WILLIAM CAMPBELL of 78 Duncairn Gardens Belfast Ireland Pattern Maker
do hereby declare the nature of this invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
This improved arrangement of antifriction rollers in sheaves consists in the
introduction of a stationery bush on the pin of the sheave, this bush is flanged and
the axles of the antifriction rollers roll thereon, the major diameter of the anti-
friction rollers support the outer ring or sheave proper.
To prevent the contact of the surfaces of the antifriction rollers which move in
opposite directions the axles thereof may be kept apart by guides or keys which
would move round the stationery bush with the antifriction rollers.
By the difference in diameters of the antifriction rollers and their axles and the
surfaces thereof being kept apart a free moving sheave is obtained which is not
likely to wear flats upon the pin or antifriction cylinders and balls of the ordinary
antifriction rollers in sheaves used for heavey loads and where lubrication is
impossible.
It is desirable that the outer diameter of the flange should bear the same ratio
to the axles of the antifriction rollers as the internal diameter of the sheave bears
to the major diameters of the antifriction rollers as by this means all sliding or
rubbing motion is avoided.

page_text: The drawing herewith shews in Fig. 1 an elevation of the sheave constructed
according to the foregoing and Figs. 2 and 3 are sectional views of the same the
same letters and figures of reference always apply to the same or like parts.
This improved arrangement of antifriction rollers (a) in sheaves (c) consists in
the introduction of a stationery bush () on the pin (d) of the sheave (c) this
bush (b) is flanged () and the axles (a) of the antifriction rollers (a) roll on the
surfaces of these flanges (61). The surfaces of the major diameter of the anti-
friction rollers (a) support the inside surface of the sheave (c).
To prevent the surfaces of the antifriction rollers (a) from coming into contact
the axles (a) thereof may be kept apart by guides or keys (a2) which may be
connected together so as to form a ring as in Fig. 4 and which would move round
the stationery bush (6) with the antifriction rollers (a).
By the difference in diameter of the antifriction rollers (a) and their axles (a¹)
and the surfaces thereof being kept apart a free moving sheave (c) is obtained
which is not liable to wear flats upon the pin (d) or antifriction cylinders and balls
of the ordinary autifriction rollers in sheaves used for heavey loads and where
lubrication is impossible. It is desirable that the outer diameter of the flange (¹)
should bear the same ratio to the axles (a¹) of the antifriction rollers (a) as the
internal diameter of the sheave (c) bears to the major diameters of the antifriction
rollers (a) as by this means all sliding or rubbing motion is avoided.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
The improved arrangement of antifriction rollers in sheaves, each roller having
two diameters and rolling upon a fixed bush in the manner and for the purpose
herein described and illustrated.
Dated this 7th day of July 1893
MYLES O'H. REILLY.
WILLIAM CAMPBELL.