Year: 1899

page_text: I, WILLIAM PELHAM BULLIVANT, of 72, Mark Lane, in the City of London,
Gentleman, do hereby declare the nature of this invention to be as follows:-
This invention relates to pulley. blocks, and it has for its object to provide a
block in which I overcome the objection due to the reduction in strength by the
use of a moveable portion, or hinge, to allow of the admission of the rope, or
chain, in what are known as snatch blocks.
According to my invention one of the side bars is capable of being turned on
the centre pin of the block, and it is secured in its closed position, and released
for opening it, by means of the pin which passes through the side bars and the
cross-head carrying the hook, or eye, by which the block is suspended. This
pin is arranged so that it can be moved longitudinally sufficiently to release the
said side bar, and the range of motion of the said pin is limited by means of a
transverse pin engaging in a groove in the cross-head and a groove in the pin
which passes through the cross-head and side bars, one of the said grooves,
(preferably that in the pin) being made of such an extent, lengthwise of the
pin, as to allow of the movement of the pin necessary to release the moveable
side bar.
By this arrangement both of the side bars bear equally on the pin in the
cross-head and thus take an equal share of the strain.
Dated thin oond dose of n mbon 1900
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
I, WILLIAM PELHAM BULLIVANT, of 72, Mark Lane, in the City of London,
Gentleman, 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 invention relates to pulley blocks and it has for its object to provide a
block in which I overcome the objection due to the reduction in strength by the
use of a moveable portion, or hinge, to allow of the admission of the rope, or
chain, in what are known as snatch blocks.
I will describe my invention with reference to the accompanying drawing
which represents in elevation at right angles to each other a pulley block pro-
vided with an arrangement according to my invention. One of the side bars A A²

page_text: (namely that marked A²) is capable of being turned on the centre pin 6 of the
block and it is secured in its closed position and released for opening it, by
means of the pin B which passes through the side bars A A² and the cross-head C
carrying the hook, or eye c by which the block is suspended. This pin B is
arranged so that it can be moved longitudinally sufficiently to release the side
bar A and the range of motion of the said pin B is limited by means of a trans-
verse pin engaging in a groove 62 in the pin B which passes through the
crosss head C and side bars A A² the groove being made of such an extent,
lengthwise of the pin, as to allow of the movement of the pin B necessary to
release the moveable side bar A².
By this arrangement both of the side bars A A2 bear equally on the pin in the
cross-head and thus take an equal share of the strain.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
'I claim is:
1. In pulley blocks arranging one of the side bars so that it can be turned
on the centre pin of the block by withdrawing the cross-head pin from engage-
ment with the said arm substantially as hereinbefore described.
2. A pulley block constructed as hereinbefore described and illustrated in the
accompanying drawing.
Dated this 24th day of September 1900.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.