PRUVIDIONAL SIMUL Improvements in Pulley Blocks.
Year: 1893

page_text: Date of Application, 7th July, 1893
Complete Specification Left, 22nd Mar., 1894-Accepted, 16th June, 1894
PRUVIDIONAL SIMUL
Improvements in Pulley Blocks.
A communication from JOHN LANG POPE, Gentleman, of Cleveland, County of
Cuyahoga, State of Ohio, United States of America.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, 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 pulley-block of this invention comprises essentially the following parts;-
A pressed metal shell or casing made in sections fitted together edgewise of the
sheave, an interior sheave or pulley, and filling blocks of wood or other soft
material contained in the shell and set at the sides of the sheave, for the sheave to
bear against.
The invention relates to the combination of these parts and also severally to
certain novel constructions of the sheave, the wooden filling blocks, and their
attachment to the shell, the shell itself, and the hook and swivel by which the
block is suspended. It also relates to a multiple pulley-block of improved
construction.
The metal shell of the pulley-block is made in two symmetrical sections divided
on the side of the shell so that the sections are adapted to fit together edgewise of
the sheave. Each section is made of pressed or stamped metal and has at its
lateral edge a mortice-opening formed by slitting the metal and pressing in the
edges, thus strengthening the shell at the mortice and forming recesses to receive
the wooden filling-blocks hereinafter described. At the upper end the sections of
the shell are contracted in diameter, so that when put together they shall constitute
an annular shoulder for the swivel.
The hub of the sheave is set pivotally on a pin passing through the wooden
filling-blocks of circular outline. These blocks are set at the sides of the sheave,
between the sections of the shell, whose cheeks are filled and strengthened thereby.
The blocks also serve as lateral bearings for the sheave. Their novel feature of
construction is that they are circular in outline, the advantage being that a smaller,
lighter and cheaper pulley-block is thereby secured.
The shank of the swivel eye fits within the smaller shoulder at the top of the
shell-sections and is linked to the
eye of a hook.
In order to assist the shell in taking the strain from the pin and putting it on
the hook when the pulley-block is in use, straps are employed extending from a
collar which fits within the shoulder of the shell and over the shank of the swivel.
These straps extend downwardly and encircle the pin, preferably extending through
saw-scarfs or slots in the filling blocks.
The sections of the shell are held together at their meeting edges by connecting
plates and rivets or otherwise, and preferably also, by rivetting to the above
mentioned collar.
The sheave is preferably pressed in sections of circular outline, each having a
semi-grooved periphery and having an annular portion pressed inwardly to
constitute a meeting and rivetting web for attachment to a similar portion of the

page_text: other section. These sections are set against each other side to side, and are fixed
together and at the centre of the sheave thus constituted there is an interposed
short tubular section or thimble set between the sections and adapted to constitute
the bearing through which the pin passes. The sheave so constructed is light and
very strong.
The hook is hollow being constituted of pressed metal sections whose line of
division extends lengthwise of the hook the sections being held together by rivets
or otherwise. These sections may be pressed and connected in a single piece, bent
up together on the central line of the book-eye, or they may be pressed in two
distinct sections and the eye portions fitted over an enclosed ring and held together
by rivets. The hollow hook thus made of pressed sections is very strong and is
not as liable as solid hooks to be bent out of shape when subjected to heavy strains
in use.
The hollow hook may be made otherwise than as above described. For
example it may be pressed in a single piece with the seam on the outer edge of the
hook proper and its eye.
The swivel eye may be made in sections in manner similar to that just described
with reference to the hook.
In a pulley-block with more than one sheave, constructed in accordance with
this invention, the shell of the pulley-block is made of two laterally divided
sections, which fit together edgewise of the sheave. Each section has mortice
openings preferably formed with inturned edge, as above explained and filling-
blocks are inserted on the outer sides of the sheaves, and a filling-block also in
the middle between the sheaves fitting at its edges between the inturned edges
of the mortices. The sheaves are set between the filling-blocks, on a pin which
preferably passes through straps depending from a collar arranged as above
explained.
Within the circle of the rivetted webs, the sides of the sheave project laterally
so as to constitute flat bearing faces extending beyond the limits of the margins of
the peripheral groove of the sheave. These faces keep the margins of the sheave
from rubbing against the sheave-block, and thus diminish the friction and prevent
chafing of the rope.
It will be understood that by making the shell thicker with a correspondingly
increased number of mortices, and inserting a filling-block between each adjacent
pair of sheaves a pulley-block of two or more sheaves is produced.
Dated this 7th day of July 1893.
W. P. THOMPSON & BOULT,
Of London, Liverpool, Manchester, and Nottingham,
Agents for the Applicant.
A communication from JOHN LANG POPE, Gentleman, of Cleveland, County of
Cuyahoga, State of Ohio, United States of America.
I, ALFRED JULIUS BOULT, of 323 High Holborn, in the County of Middlesex,
Chartered Patent Agent 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 pulley-block of this invention comprises essentially the following parts;-
a pressed metal shell or casing made in sections fitted together edgewise of the
sheave, an interior sheave or pulley, and fitting blocks of wood or other soft
material contained in the shell and set at the sides of the sheave, for the sheave to
bear against.

page_text: The invention will be best understood by reference to the accompanying drawings
in which ;-
Fig. 1 is a side elevation, partly in vertical section on the line I-I of Fig. 2,
showing this improved pulley-block. Fig. 2 is an edge elevation thereof, partly in
vertical section, on the line a-b of Fig. 1;
Fig. 3 is an edge view of the hook; Fig. 4 is a vertical section thereof, on the
line IV-IV of Fig. 3;
Fig. 5 is a view of the hook before it is finished, the purpose of this view being
to illustrate the manufacture of the hook;
Fig. 5 represents a hook of modified construction ;
Fig. 6 and 7 illustrate multiple pulley-blocks of this invention; Fig. 6 showing
in perspective the interior of one of the metallic shells, and Fig. 7 showing the
pulley-block, partly in edge view and partly in vertical section.
Like symbols of reference indicate like parts throughout the drawings.
The invention relates to the combination of these parts and also severally to
certain novel constructions of the sheave, the wooden filling blocks, and their
attachment to the shell, the shell itself, and the hook and swivel by which the
block is suspended. It also relates to a multiple pulley-block of improved
construction.
In the drawings, 22 represent the metal shell of the pulley-block made in two
symmetrical sections divided on the line a-b which bisects the side of the shell so
that the sections are adapted to fit together edgewise of the sheave. Each section
is made of pressed or stamped metal and has at its lateral edge a mortice-opening 3
formed by slitting the metal and pressing in the edges 4 thus strengthening the
shell at the mortice and forming recesses to receive the wooden filling-blocks
hereinafter described. At the upper end the sections of the shell are contracted
in diameter, so that when put together they shall constitute an annular shoulder 5
for the swivel.
6 is the sheave whose hub is set pivotally on a pin 7 passing through the wooden
filling blocks 8 of circular outline. These blocks are set at the sides of the sheave,
between the sections of the shell, whose cheeks are filled and strengthened thereby.
The blocks also serve as lateral bearings for the sheave. Their novel feature of
construction is that they are circular in outline, the advantage being that a smaller,
lighter and cheaper pulley-block is thereby secured.
9. is the swivel eye, whose shank fits within the smaller shoulder 5 at the top of
the shell-sections, and is linked to the eye of a hook 15, as shown in Figs. 1 and 2.
In order to assist the shell in taking the strain from the pin and putting it on
the hook when the pulley-block is in use, straps 10 are employed extending from a
collar 11, which fits within the shoulder of the shell and over the shank, of the
swivel. These straps extend downwardly and encircle the pin, preferably extending
through saw-scarfs or slots in the filling blocks.
The sections of the shell are held together at their meeting edges by connecting
plates and rivets 12, or otherwise, and preferably also, by rivetting to the collar 11
as shown.
The sheave of preferably pressed in sections of circular outline, each having a
semi-grooved periphery 13 and having an annular portion 14 pressed inwardly to
constitute a meeting and rivetting web for attachment to a similar portion of the
other section. These sections are set against each other side to side, and are fixed
together as shown in Fig. 2 and at the centre of the sheave thus constituted there
is an interposed short tubular section or thimble 17 set between the sections and
adapted to constitute the bearing through which the pin passes. The sheave so
constructed is light and very strong.
The hook 15 is hollow, being constituted of pressed metal sections ef, whose
line of division extends lengthwise of the hook the sections being held together by
rivets or otherwise. These sections may be pressed and connected in a single
piece, as shown in Figs. 3, 4 and 5, bent up together on the central line of the
hook-eye, or they may be pressed in two distinct sections and the eye portions fitted

page_text: The
over an enclosed ring 16 as shown in Fig. 51 and held together by rivets. The
hollow hook thus made of pressed sections is very strong and is not as liable as
solid books to be bent out of shape when subjected to heavy strains in use.
hollow hook may be made otherwise than as above described. For, example, it
may be pressed in a single piece with the seam on the outer edge of the hook proper
and its eye.
The swivel eye may be made in sections in manner similar to that just described
with reference to the hook.
In Figs. 6 and 7 is illustrated a pulley-block with more than one sheave,
constructed in accordance with this invention. The shell of the pulley-block is
made of two laterally divided sections, which fit together edgewise of the sheave.
One of the sections is illustrated in Fig. 6. Each section has mortice openings 3¹
preferably formed with inturned edges, as above explained, and filling-blocks 8¹ are
inserted on the outer sides of the sheaves, and a filling-block also in the middle
between the sheaves, fitting at its edges between the inturned edges of the mortices.
The sheaves are set between the filling-blocks, on a pin 7', which preferably passes
through straps 10¹ depending from a collar 11' arranged as above explained.
Within the circle of the rivetted webs, the sides of the sheave project laterally
so as to constitute flat bearing faces extending beyond the limits of the margins of
the peripheral groove of the sheave. These faces keep the margins of the sheave
from rubbing against the sheave-block, and thus diminish the friction and prevent
chafing of the rope.
The construction of this before described multiple pulley-block may be modified
without departing from the spirit of the invention. It will be understood that by
making the shell thicker with a correspondingly increased number of mortices, and
inserting a filling block between each adjacent pair of sheaves, a pulley-block of
two or more sheaves is produced.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondent, and in what manner
the same is to be performed I declare that what I claim is ;-
1. A pulley-block having a metal shell, a sheave having a pin, a swivel and
swivel-eye a collar between the shell and swivel straps extending from the collar
to the pin and a hook engaging the swivel-eye; substantially as described.
2. A pulley-block having a metal shell formed of pressed laterally divided
sections said sections having circular filling blocks of soft material substantially as
described.
3. A pulley-block, having a metal shell a sheave having a pin a swivel, a collar
between the shell and swivel and straps extending from the collar to the pin
substantially as described.
4. A pulley-block having a metal shell interior filling blocks a sheave having a
pin and straps extending from the top of the pulley-block through slots in the
filling-blocks substantially as described.
5. A pulley-block having a sheet metal swivel with an eye and a sheet metal
hook whose eye is linked into the eye of the swivel substantially as described.
6. A pulley-block having an external laterally divided metal shell sheaves and
inner circular filling blocks of softer material, contained by the shell and situated
at the outer sides of the sheaves and between the sheaves substantially as
described.
7. A pulley-block having a hollow hook made of attached pressed sections
substantially as described.
8. A pulley-sheave composed of sections divided in the plane of the sheave said
sections having partial grooves adapted to meet and having laterally fitting webs
the lateral cheeks within the circle of the webs which extend laterally beyond the
marginal limits of the sheave-groove substantially as described.
9. A pulley-sheave composed of sections divided in the plane of the sheave said
sections having partial grooves adapted to meet and having laterally fitting webs

page_text: and lateral cheeks within the circle of the webs which extend laterally beyond the
marginal limits of the sheave-groove and an interposed thimble substantially as.
described.
Dated this 22nd dor of Marab 1904
W. P. THOMPSON & BOULT,
Agents for the Applicant.