Improvements in and relating to Pulley Blocks.
Year: 1891

page_text: Date of Application, 14th Mar., 1891
Complete Specification Left, 5th Dec., 1891-Accepted, 9th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pulley Blocks.
We, Joux WILLIAM GREEN of 15 Carters Green West Bromwich Estate
Agent and DAVID ROPER of 41 Lyndon West Bromwich General Smith, do
hereby declare the nature of this invention to be as follows:-
The object of our invention is to facilitate the removal of the wheel or wheels
of pulley blocks when worn or damaged. With this object we form the sheave of
any ordinary shape, but instead of using a rigid pin, which necessitates damage to,
or the entire destruction of the sheave when removing the wheel, we use
threaded bolt or spindle which passes through the wheel or wheels, securing them
in their proper positions in the shackle. On one end of this bolt or spindle is a
fixed head or nut and the desired rigidity is obtained by screwing a loose nut on
the opposite or threaded extremities of the spindle.
By means of this nut the pulley can be adjusted at any time to compensate for
wear. This invention is applicable to all descriptions of pulley blocks either of
wood or metal.
Dated this 14th day of March 1891.
GRAHAM & GRAHAM,
Agents for Applicants.
COMPLETE SPECIFICATION.
Improvements in and relating to Pulley Blocks.
We, JOHN WILLIAM GREEN of 15 Carter's Green, West Bromwich, Estate
Agent and DAVID ROPER of 41 Lyddon West Bromwich, General Smith 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 objects of our invention are to facilitate the removal of the wheels of pulley
blocks, when they become either worn or damaged and also the tightening up of
the same, to compensate for wear.
For the carrying out of these objects we construct our pulleys of any suitable
metal or material, as herein described, having reference at the same time to the
accompanying drawings in which :-
Fig. 1 represents a front elevation, and
Fig. 2 a cross sectional elevation of oue form of our improved pulley blocks.
Like letters of reference indicate corresponding parts in both the figures.
a is the shackle or frame of the pulley block; the wheel or pulley; e the bolt
or pin on which the pulley runs, which is preferably headed as shown at the end d
and screw-threaded at e, to receive the nut f g is a swivel & ring by which the
pulley block can be affixed to any suitable firm support.
By the use of our screw threaded bolts and nuts in the construction of pulley
blocks, the advantages gained are, that the wheels can be readily removed and
replaced at any time without damaging the block, when the same may have become
accidentally injured or broken, or worn, and also, the shackle or frame a being made
of spring steel or other like material, capable of yielding to the action of the nut,
and preferably of somewhat the form shown in the drawings, wear can easily be
compensated for, at any time by screwing up the nut f, and so reducing the space
between the ends h, h, of the shackle or frame, thus making the pulley blocks
firmer and more durable in use.

page_text: It is obvious although only one form of our improved pulley blocks is illustrated
in the drawings that our improvements are applicable to other descriptions of
pulley blocks constructed with either one or more wheels or pulleys, without
departing from the nature of our invention.
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
_
An adjustable pulley block constructed as shown, or with one or more pulleys, or
wheels running on a detachable spindle of the form herein described, and as
illustrated in the accompanying drawings.
Dated this 5th day of December 1891,
GRAHAM & GRAHAM,
Agents for Applicants.