Improvements in Safety Hooks used in Raising and Lowering Heavy Loads and for other like Purposes.
Year: 1889

page_text: Date of Application, 22nd Oct., 1889
Complete Specification Left, 8th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Safety Hooks used in Raising and Lowering
Heavy Loads and for other like Purposes.
We GEORGE TANGYE of the firm of Tangyes Limited of Cornwall Works Soho in
the County of Stafford Engineers and THOMAS MEACOCK of No. 2 Waverhill
Road Handsworth in the County of Stafford Mechanical Engineer do hereby declare
the nature of this Invention to be as follows:-
Our invention consists in constructing in the manner hereinafter described the
parts of safety hooks principally used in raising and lowering heavy loads whereby
the closing and strengthening of the said hooks when the load is suspended from the
said hook is effected in a simple manner and the slipping of the chain or rope from
the hook is thereby prevented.
The said hooks may also be applied to ropes or chains for hauling purposes and to
hooks for chains exposed to great strain.
In constructing a safety hook according to our invention we use a hook having at
its top an eye through which an axis or pin passes and on which the hook turns.
The ends of the pin or axis project beyond the sides of the hook and on the said
projecting ends two radial side horns or arms are fixed the said horns being situated
parallel with the sides of the said hook. The upper portions of the said fixed side horns
are formed into a shackle loop for the attachment of the safety hook to the lifting
chain or rope or into a solid cylindrical end for fitting into the ordinary swivel cross
head and the lower ends of the said radial side horns are furnished with inwardly
projecting lips or snugs. The normal position of the fixed sido horns described is
at an angle of about 30 degrees with the swivel loop or cylindrical end of the said
horns.
On the nose or point end of the hook and on opposite sides thereof are lips or
snugs which can engage with or upon the correspondingly shaped lips or snugs on
the lower ends of the fixed side horns.
When there is no load on the hook its nose part projects outwards beyond the
bottoms of the fixed side horns and the hook is fully open and the lifting sling
chain or rope can be hooked upon it. The taking by the hook of the open position
described is effected by a strong blade spring bearing upon the back of the hook.
When a load is suspended from the hook the weight causes its nose to move backwards
or towards the bottoms of the fixed side horns. The projecting lips or snugs at the
nose end of the hook are thereby made to engage with or upon those at the ends
of the fixed horns and close the hook that is convert the open hook into an eye or
ring thereby preventing the chain or rope from slipping off the said book when the
load is suspended and further the hook is materially strengthened by the engagement
of the two sets of projecting lips or snugs described.
Stops at the nose end of the hook striking against the side horns prevent the
backward motion of the hook beyond that necessary for the engagement of the two
sets of snugs for the closing and strengthening of the hook.
Although we prefer to use a spring for bringing the hook to its fully open position
yet the said spring may be omitted.
Dated this 22nd day of October 1889.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: Improvements in Safety Hooks used in Raising and Lowering
Heavy Loads and for other like Purposes.
We GEORGE TANGYE of the firm of Tangyes Limited of Cornwall Works Soho
in the County of Stafford Engineers and THOMAS MEACOCK of No. 2 Waverhill Road
Handsworth in the County of Stafford Mechanical Engineer do hereby declare
the nature of our said invention and the manner in which the same is to be
performed to be particularly described and ascertained in and by the following
statement:
Our invention consists in constructing in the manner hereinafter described the
parts of safety hooks principally used in raising and lowering heavy loads whereby
the closing and strengthening of the said hooks when the load is suspended from the
said hooks is effected in a simple manner and the slipping of the chain or rope from
the book is thereby prevented.
The said hooks may also be applied to ropes or chains for hauling purposes and to
hooks for chains exposed to great strain.
In constructing a safety hook according to our invention we use a hook having at
its top an eye through which an axis or pin passes and on which the hook turns.
The ends of the pin or axis project beyond the sides of the hook and on the said
projecting ends two radial side horns or arms are fixed the said horns being situated
parallel with the sides of the said hook. The upper portions of the said fixed side
horns are formed into a shackle loop for the attachment of the safety hook to the
lifting chain or rope or into a solid cylindrical end for fitting into the ordinary
swivel cross head; and the lower ends of the said radial side horns are furnished with
inwardly projecting lips or snugs. The normal position of the fixed side horns
described is at an angle of about 30 degrees with the swivel loop or cylindrical end
of the said horns. On the nose or point end of the hook and on opposite sides
thereof are lips or snugs which can engage with or upon the correspondingly shaped
lips or snugs on the lower ends of the fixed side horns.
When there is no load on the hook its nose part projects outwards beyond the
bottoms of the fixed side horns and the hook is fully open and the lifting sling chain
or rope can be hooked upon it. The taking by the hook of the open position
described is effected by a strong blade spring bearing upon the back of the hook.
When a load is suspended from the hook the weight causes its nose to move
backwards or towards the bottoms of the fixed side arms or horns. The projecting
lips or snugs at the nose end of the hook are thereby made to engage with or upon
those at the ends of the fixed horns and close the hook; that is, convert the open
hook into an eye or ring thereby preventing the chain or rope from slipping off the
said hook when the load is suspended and further the hook is materially strengthened
by the engagement of the two sets of projecting lips or snugs described.
Stops at the nose end of the hook striking against the side horns prevent the
backward motion of the hook beyond that necessary for the engagement of the two
sets of snugs for the closing and strengthening of the hook.
Although we prefer to use a spring for bringing the hook to its fully open position
yet the said spring may be omitted.
We will now proceed to describe with reference to the accompanying Drawing the
manner in which our invention is to be performed.
Figure 1 represents in side elevation and Figure 2 in end elevation a safety hook
constructed according to our invention, the said hook having a shackle loop for its
attachment to the lifting chain or rope; Figure 3 represents in side elevation another
safety hook constructed according to our invention provided with the ordinary swivel
cross head attachment for the lifting chain or rope and a spring for bringing the hook

page_text: into its full open position; Figure 4 represents a plan of the cross head of the
arrangement Figure 3.
In Figures 1, 2 and 3 the hook is represented in its closed position after the load
has been suspended from it and the said hook is indicated in dotted lines in its
fully open position after the load has been removed from the hook in Figure 3.
The same letters of reference indicate the same parts in the several Figures of the
Drawing.
A is the safety hook having an eye B at top through which the axis or pin C
passes and on which the hook turns; D D are the radial side horas or arms the top
or upper ends of which are formed into the shackle loop E to which the lifting chain
or rope is attached. Or the upper ends of the side horns or arms D D are made into
a solid cylindrical end L for fitting in the ordinary swivel cross head K to which the
It will be seen by an
lifting chain or rope is attached as represented in Figure 3.
examination of Figure 2 that the joint pin C on which the hook A turns has extended
ends beyond the eye B and on the said extended ends of the joint pin the radial
horns or arms D D are fixed the said radial horns or arms being parallel with the sides
of the hook.
The fixed side horns or arms D D have the normal position with respect to the
shackle loop E, or solid cylindrical end L, represented in Figures 1 and 3, that is,
make an angle of about thirty degrees with the said shackle loop E or cylindrical
end L. The lower parts of the fixed side horns D D are furnished with inwardly
projecting lips or snugs FF with which similarly shaped lips or snugs G G near the
point or nose end of the hook engage as seen in Figure 2 when the hook is in its
closed position;
HH are projections or stops near the point or nose end of the hook
for limiting the backward motion of the hook when a load is placed upon it. The
projections or stops HH' may either be made solid with the hook or inserted in
the hook.
In order to ensure the fully opening of the hook into the dotted line position
Figure 3 when the load is removed from it we use the strong blade spring Japplied
to the solid cylindrical end L of the radial side horns D D below the cross head as
represented in Figure 3, or in the arrangement Figures 1 and 2 to the shackle loop e,
the said strong blade spring bearing on the back of the hook but we wish it to be
understood that our improved safety hook may be used without a blade spring for
fully opening it.
When the load is removed from the hook A its nose part projects inwards beyond
the bottoms of the fixed side horns D D or is pressed into its fully open position,
indicated in dotted lines in Figure 3, by the strong spring J. When the hook is so
On a load being suspended
opened the lifting sling chain or rope is hooked upon it.
from the open hook the weight causes its nose to move backwards or towards the
bottoms of the fixed side horns as represented in Figures 1 and 3 so as to close the
hook that is to say, the projecting lips or snugs G G engage with or upon the pro-
jecting lips or snugs on the fixed side horns thereby converting the open
hook into an eye or ring and preventing the chain or rope from slipping off the said
hook when the load is suspended. By the locking or engaging together of the two
pairs of lips or snugs F F and G G the closed hook is materially strengthened.
When the pairs of snugs F F and G G₁are engaged together the further backward
motion of the hook is prevented by the stops H H on the nose end of the hook
striking against the side horns D D as seen in Figure 2.
Having now particularly described and ascertained the nature of our invention
and the manner in which the same is to be performed we declare that we claim
as our invention of "Improvements in safety hooks used in raising and lowering
heavy loads and for other like purposes":-
The combination with the hook of two fixed radial side horns or arms situated
parallel with the sides of the hook for closing the hook when the latter takes its back-
ward position on suspending the load from it the said horns or arms being preferably

page_text: provided with inwardly projecting lips or snugs with which similar projecting lips or
snugs at the nose end of the hook engage when the said hook takes its closed position
for the purposes and substantially as herein before described and illustrated in the
accompanying Drawing.
רד
T
1000
GEORGE TANGYE.
THOMAS MEACOCK.