Improvements in Hooks for Cranes and other Lifting Machinery and Appliances.
Year: 1898

page_text: Date of Application, 20th Dec., 1898
Complete Specification Left, 29th Aug., 1899-Accepted, 28th Oct., 1899
PROVIDIUNAL DIECIFICATION.
Improvements in Hooks for Cranes and other Lifting Machinery and
Appliances.
We, DAVID THOMAS YOUNG and HARRY WILLIAM YOUNG, trading as Youngs,
of Ryland Street Works, Ryland Street, in the City of Birmingham, Engineers,
do hereby declare the nature of this invention to be as follows:
-
This invention consists of improvements in hooks for cranes and other lifting
machinery and appliances, our object being to so construct such hooks as to give
greater strength for a given quantity of metal than can be obtained with the
hooks of ordinary construction.
We construct our improved crane hooks from iron or steel rods or bars, prefer-
ably of circular section, forging them to such a shape as will permit of con-
venient attachment and detachment with the load to be raised, or the chains or
ropes secured to such load. We form a straight stem or eye at one end of each
hook for connection with the pulley block or other required part or article and
between such stem and the curved portion of the hook we raise a circular shoulder
or collar.
After the rods or bars have been thus made to the required hook form we
subject the metal, in a hot state, at the part were the greatest stress occurs when
in service, to the action of suitably formed pressing or stamping tools for the
purpose of causing it to assume a double channel like section, of such a section
as is comprised by an upper and lower flange united by a central connecting
web.
By such treatment in the course of manufacture we are enabled to dispose the
metal to the best advantage for the resistance of the stresses imposed upon the
hook, and we can thus produce hooks of a neat and convenient form and of great
strength with but a light weight of metal.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., &
18, Southampton Buildings, Birmingham.
Agents for the Applicants.
Improvements in Hooks for Cranes and other Lifting Machinery and
Appliances.
We, DAVID THOMAS YOUNG and HARRY WILLIAM YOUNG, trading as Youngs,
of Ryland Street Works, Kyland Street, in the City of Birmingham, Engineers,
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 consists of improvements in hooks for cranes and other lifting

page_text: machinery and appliances, our object being to so construct such hooks as to give
greater strength for a given quantity of metal and a better appearance that can
be obtained with the hooks of ordinary construction.
We construct our improved crane hooks from iron or steel rods or bars, prefer-
ably of circular section, forging them to such a shape as will permit of con-
venient attachment and detachment with the load to be raised, or the sling chains
or ropes secured to such load. We form a straight stem or eye at one end of
each hook for connection with the pulley-block or other required part or article
and between such stem and the curved portion of the hook we raise a circular
shoulder or collar.
After the rods or bars have been thus made to the required hook form we
subject the metal, in a hot state, to the action of suitably formed pressing or
stamping tools for the purpose of causing it to assume, at the part where the
greatest stress occurs, a girder like section, or such a section as is comprised by
an upper and lower flange united by a central connecting web, and to impart a
good finish or appearance to the surface of the hooks.
By such treatment in the course of manufacture we are enabled to dispose the
metal to the best advantage for the resistance of the stresses imposed upon the hook,
and to produce hooks of a neat form and finished surface and of great strength
with but a light weight of metal.
Referring to the accompanying sheet of explanatory drawings.
Figure 1 is an elevation of a hook constructed in accordance with our invention
having a straight stem at its upper end for connection (by rivetting) with a shackle,
pulley-block, or other required part.
Figure 2 is an elevation showing the hook connected to a shackle.
Figure 3 is an elevation of a hook constructed in accordance with our invention
having an eye at its upper end suitable for a pin connection with a pulley-block
or other required part, and Figure 4 a section of the same through the line a
Figure 3.
b
sister.
Figure 5 is an elevation of an arrangement or combination known at a
hook constructed in accordance with our invention, and Figure 6 a section of
the same on the line c d Figure 5.
In every case we subject the hook in a hot state to the action of suitable press-
ing or stamping tools, and so form the metal at the bight or bent portion as A
to a girder like section such as is shown by the sectional views Figures 4 and 6,
whilst at the same time effectually smoothing or finishing the surface of the
hook.
We do not limit the application of our invention to the particular type of
hooks herein described and illustrated but adapt it in the construction of hooks
of modified shapes and sections to suit varying services and requirements.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
Hooks, for cranes and other lifting machinery, having the metal at the bight
or bent portion formed to a girder like section and its complete surface finished,
substantially as and for the purpose herein before described and as illustrated.
Dated this 28th day of August 1899
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents for the Applicants.