Improvements in Pulleys.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pulleys.
GEORGE SMITH and EDWIN SMITII, both of Nene Side Iron Works, Thrapston,
Northamptonshire, Engineers, do hereby declare the nature of this invention to
be as follows:-
-
The object of our invention is to provide a combined fast & loose pulley
which is self fixing and interchangeable as regards the size of the shaft upon
which they are required to be used.
To carry out our invention we screw the fast pulley internally and use an
interchangeable screw bush as described in our Patent No. 3290, 1885. On this
fast pulley we cast on one side an extended boss or sleeve which is turned to
carry the loose pulley, the loose pulley is bored to fit this sleeve upon which it
runs instead of upon the shaft in the usual manner the loose pulley is kept upon
the sleeve by a screw or by other suitable means, which thus provides a com-
bined and self contained pair of fast & loose pulleys, self-fixing, and inter-
changeable for different size shafts. No keys, keyways, set screws or loose collars
required to fix.
1041
1800
GEORGE SMITH.
EDWIN SMITH.
Improvements in unleys.
GEORGE SMITH, Engineer, Thrapston, and EDWIN SMITH, Engineer, Thrapston,
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:
-
The object of our invention is to provide a combined fast & loose pulley or
rigger which is self fixing and interchangeable as regards the size of the shaft
upon which they are required to be used.
To carry out our invention we screw the fast pulley internally and use an
interchangeable screw bush as described in our Patent No. 3290 1885. On this
fast pulley we cast or fix on one or both sides an extended boss or sleeve which is
turned to carry the loose pulley. The loose pulley is bored to fit this sleeve upon
which it runs instead of upon the shaft in the usual manner the loose pulley is
kept upon the sleeve by a screw or by other suitable means which thus provides
a combined and self contained pair of fast and loose pulleys, self fixing and inter-
977

page_text: changeable for different size shafts no keys keyways, set screws or loose collars
required to fix.
In order that our invention may be fully understood we will describe the same
by reference to the accompanying drawing. A is a shaft. B is a fast pulley
attached to same by means of a conically screwed boss & bush as described in
Patent 3290 1885. C is the extended boss or sleeve previously referred to upon
which revolves the loose pulley D, kept in place by the collar E, attached to
the extended boss or sleeve C by set screws FF. It will be readily understood
that we may substitute for the collar and set screws any other suitable method
of keeping the loose pulley in place laterally upon the extended boss.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is:-
I. The combination with a pulley or rigger having a conical and screw threaded
centre hole of an extended boss or sleeve cast or fixed on one or both sides to
receive and carry a loose pulley substantially as and for the
before described and represented in the accompanying drawing.
purpose herein-
Dated this 7th day of
النسيا
1000
GEORGE SMITH,
EDWIN SMITH.