IMPROVEMENTS IN DIFFERENTIAL AND OTHER PULLEY BLOCKS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I ROWLAND PRIEST of Pulley Block Works Cradley Heath in the County of
Stafford Pulley Block, Hydraulic Jack and Chain Manufacturer and Brass and
Iron Founder do hereby declare the nature of my invention for IMPROVEMENTS IN
DIFFERENTIAL AND OTHER PULLEY BLOCKS to be as follows:-
My Invention consists of metal chain-guides bolted, pinned, or cast on to the
Arms of Pulley Blocks, the object of these guides being to keep the chains, used to
work the Pulley Blocks, separate and apart and in proper position, and prevent
them becoming locked or entangled. In whatever position the Pulley Block may
be placed these guides keep the chains in proper position and effectually prevent
them locking or becoming entangled.
To make my Invention clear I have appended hereto a Sheet of Drawings
shewing the guide when fixed or attached to the Arms of a Pulley Block, and also
shewing the guide when detached therefrom.
The Invention can be applied to the Arms of any kind of Pulley Block where
Chains are used and can if desired be cast on to the Arms making the Arms and
guide in one piece. The kind of Pulley Block to the Arms of which I at present
attach these guides is known as Weston's lapsed patent differential Chain Pulley
Block.
Figure 1. in the Drawings is a three-quarter Elevation of one of those pulley
Blocks with the chain guides attached. A are the Arms of the Block to which
the chain guide is fixed by a bolt or pin passing through the Arms and through
the two small wheels C. D. lying between such Arms. B. are the chain guides.
Figure 2. is a front Elevation of one of the chain guides. G. G¹ G³ are the three
points of the chain guide which descend to and almost touch the three rims of the
Pulley Block Wheel Figure 1.

page_text: I ROWLAND PRIEST of Pulley Block Works, Cradley Heath in the County of
Stafford Pulley Block, Hydraulic Jack and Chain Manufacturer and Brass and
Iron Founder do hereby declare the nature of my invention for IMPROVEMENTS
IN DIFFERENTIAL AND OTHER PULLEY BLOCKS and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :—
My Invention consists of metal chain-guides, bolted, pinned, or cast on to the
arms of Pulley Blocks, the object of these guides being to keep the chains used to
work the Pulley Blocks, separate and apart and in proper position, and to prevent
them becoming locked or entangled. In whatever position the Pulley Block may
be placed these guides keep the chains in proper position and effectually prevent
them locking or becoming entangled. To make. my. Invention clear I have
appended hereto a Sheet of Drawings shewing the guides when fixed or attached
to the arms of a Pulley Block and also shewing the guide when detached
therefrom.
.
The Invention can be applied to the arms of any kind of Pulley Block where
chains are used, and can if desired be cast on to the arms making the arms and
guides in one piece. The kind of Pulley Block to the arms of which I at present
attach these guides is known as Weston's lapsed patent differential chain pulley
block.
Figure 1. in the Drawings is a three-quarter Elevation of one of those pulley
blocks with the chain guides attached. A. are the arms of the block to which the
chain guides are fixed by a bolt or pin passing through the arms and through the
two small wheels C. D. lying between such arms. B. are the chain guides.
Figure 2. is a front Elevation of one of the chain guides. G. G G are the
three points of the chain guide which descend to and almost touch the three rims
of the Pulley Block wheel Figure 1.
•
Figure 3. is an end view of the chain guide.
The chains used in working these pulley blocks pass between the pulley wheel
and the small wheels C. D. and between the three points of the guides and these
three points keep the chains (hanging below these points) separate and apart and
effectually prevent the chains becoming locked twisted or entangled.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim as my Invention is the improvement for keeping the chains used in working
pulloy blocks as herein before described separate and apart and in proper position
and for preventing them becoming locked twisted or entangled, that is to say, the
addition to and combination with differential and other pulley blocks of the metal
chain guides substantially as hereinbefore described and shewn on the accompanying
Drawings or any mere modification thereof..
Dated this 19th day of December 1884
EDWARD WEBB TAYLOR,
Agent for the said Rowland Priest.