IMPROVEMENTS IN POWER GEAR as to form a self-sustaining Chain Pulley Block.
Year: 1885

page_text: I JOHN EDWARD ROGERS of Poplar Street Smethwick in the County of Stafford
Machinist do hereby declare the nature of my invention for "IMPROVEMENTS IN
POWER GEAR" to be as follows:-
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When applied so as to form a self-sustaining Chain Pulley Block.
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In a frame similar in design to the ordinary Chain Block Frame with the usual
Pin or Spindle running through its centre for the Chain Wheels to work on.
On this. Pin or Spindle is fitted or solid with it' a Pinion of the required size and
pitch of Teeth ;this Spindle in this present description is fixed and not free to turn
in the frame.
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On either side of this Pinion and free to revolve on its Spindle would be fitted
chain wheels constructed in the ordinary manner to receive the chain when passed
round them.in the usual way: ind
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.On the side of each chain wheel and solid with them is a shrouding of about the
same diameter as the Chain Wheels and extending over the Pinion on the centre of
the Spindle about an equal width leaving a slight clearance: between them.
On the inside of the shrouding of each Chain Wheel-are teetht looking toward
the Pinion on the centre spindle, there being a suitable difference.in the number of
teeth in each shrouding. 19
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JUL 1
The Pitches of the teeth in the shroudings and on the Pinion would be
the same.
The space between the teeth in the shrouding of the chain wheels and the
Pinion on the Spindle is made up or geared together by what may be called a
toothed roller, which roller when the Chain wheels are turned round the fixed
pinion gives a differential motion to the two chain wheels which differential motion
contains the power given off by the Gear.
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This differential motion can be obtained by turning the Spindle carrying the
Pinion
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This Gear can be modified so as to use with it a Brake for a quick return motion
and can be applied to lifting and Pressing Apparatus.or Machinery generally.
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Dated this 25th day of August 1885.

page_text: :
I, JOHN EDWARD ROGERS of Poplar Street Smethwick in the County of Stafford
Machinist do hereby declare the nature of my invention for IMPROVEMENTS IN
POWER GEAR and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
Fig. 1-2 & 3 of Drawings in shewing my Invention would be described as
follows.
Fig. 2 shews the Gear complete as arranged for the top block of a set of self
sustaining Chain Blocks worked by a single endless Chain in the same manner as
the ordinary Weston Block.
Figs. 1 and 3 are sectional views through Fig. 2 between the sheaves of Block,
a and b and cutting through the pinions c and d.
Fig. 1 and 3 shew. the working of the power gear when combined and forming
Fig. 2.which working is as follows.
:
c is a centre pinion on shaft c¹ into which is geared the rolling. pinion d which
gears into internal teeth of a and b a and b contain a different number of teeth.
Suppose the shaft c¹ on which the Pinion c is fixed is made fast to frame f, so
that it cannot turn round motion then being given to sheaves a and b by the
endless chain in the same manner as an ordinary Weston Block they carry round
with them the rolling pinion d and as a and b contain a different number of teeth
the distance between the top and bottom block is lengthened or shortened or the
weight lowered or lifted.
a and b: Fig. 2 are grooves shewing about where the endless chain could be made
to pass round the sheaves.
It will be seen by those that this Invention may concern that it may be used in
various ways for chain Blocks and for Power Gear generally.
T'
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Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare what
'I claim is
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1. In a Power Gear the centre wheel c in combination with rolling wheel & and
internal wheels a and b substantially as shewn and described.
Dated this 24th day of May 1886.
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