IMPROVEMENTS IN SWIVEL PULLEY BLOOKS AND IN THE METHOD OF MANUFACTURE
Year: 1886

page_text: Date of Application, 23rd Dec., 1886.
Specification Accepted, 25th Jan., 1887.
I WILLIAM WALTER WILCOX of Middletown Connecticut, United States of America,
Manufacture, do hereby declare the nature of my invention for IMPROVEMENTS IN
SWIVEL PULLEY BLOOKS AND IN THE METHOD OF MANUFACTURE and in what manner
the same is to be performed, to be particularly described and ascertained in and by the
following statement:-
-
The invention relates to the form and manufacture of swivel Pulley Blocks and has
for its object the improvement of those which are of a larger size than are referred to
in my patent specification No. 4384 of this year.
Its objects are to cheapen their manufacture improve their form and increase their
strength and durability.
And consist in making the frame, shell or body of cast malleable iron or other
fusible metal and all in one piece-And the hooks eyes and straps of wrought malleable
metal. The beckele being either cast in a piece with the frame or of wrought metal
in a piece with the strap as desired.
Referring now to the accompanying drawing in which similar letters indicate similar
parts throughout. Figure 1 is a front view and Figure 2 a side view of a block with
the frame of cast metal and the swivel strap of wrought metal carried entirely round
the frame and forming a beckele at the end."
Figure 3 shows a section on the line ab Figure 1. Figure 4 is a front view and
Figure 5 a side view of a double block with the frame of cast metal and the swivel
strap or bar carried up the central web and terminating in a boss for the pulley pin.
Figure 6 shows a front view of a block with a cast metal frame forming a beckele at
the end and with the swivel strap carried up the outside and terminating in a boss for
the pulley pin-A represents the cast metal frame, B the pulleys, C the pin on which
the pulleys B revolve, and I the beckele which in Figures 1 and 2 is formed by the
strap which is represented by the letter E and in Figure 6 is cast in a piece with the
frame A. The strap E which is of wrought metal terminates in a boss Fin which the
hook G is arranged to swivel.

page_text: I do not confine myself to the use of a single or double form of frame A as it may
be cast to suit any number of pulleys as may be desired and of any convenient shape
nor do I confine myself to the shape of strap E which is shown, as it may be of any
convenient section of metal desired such as round, oval, flat, or square. The strap E
may also be carried right round the outside of the frame A as shown in Figures 1 and 2
or be carried up to the centre as shown in Figures 4, 5 and 6 or it may be only
arranged to grip the frame A at its end and be secured thereto by rivets or in any
other convenient way--The frame A is formed with grooves H H in which the strap E
may be placed and secured by riveting over the ends of the pin C or in other con-
venient manner or the strap being forged to the desired shape with or without the
hook or eye attached may be placed in the mould and the frame A cast round it and
may thus be inside as shown in Figures 4 and 5 or outside as shown in Figures 1, 2,
and 6-I do not confine myself to the use of a swivel hook Gas shown, as an eye
or ring or other suitable attachment may be used when desired.
By the method above described I obtain a cheaper and more convenient form of
swivel block than any at present in use and one which at the same time is stronger
and more durable.
The blocks may be galvanised, or painted or otherwise coated as desired.
I do not claim the use of cast metal frames as these have been in use many years,
nor do I claim the use of a wrought metal swivel hook or eye; but 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 is :-
The use of cast metal blocks in combination with wrought metal straps arranged
to receive wrought metal swivelling hooks, or other suitable attachments substantially
as described.