An Improved Method of Securing the Handles of Cranes to their Shafts.
Year: 1890

page_text: The decision of the Chief Examiner, acting on behalf of the Comptroller, of the
6th day of October 1891, allowed, under Section 18 of the Patents, &c. Act,
1883, an Amendment of this Specification.]
Date of Application 6th Feb., 1890
Complete Specification Left, 6th Nov., 1890-Accepted, 20th Dec. 1890
PROVISIONAL SPECIFICATION.
An Improved Method of Securing the Handles of Cranes to
their Shafts.
We THOMAS HODDER HEARD of 152 London Road Derby in the County of Derby
Traveller and WILLIAM KIRKLEY BIRKINSHAW of 9 Madely Street Derby in the
County of Derby Merchant do hereby declare the nature of our said invention for
"AN IMPROVED METHOD OF SECURING THE HANDLES OF CRANES TO THEIR SHAFTS
to be as follows:
―
وو
The chief feature of this invention is in securing the handles of cranes to their
shafts when in use, thus preventing any accident to the operator or other person by
the said working off, also that the handle cannot be placed on the shaft without
automatically securing itself.
This invention can be attached at little cost to already existing cranes.
In the construction of this invention we secure by suitable means onto the round
end of the shaft and next to the square portion made to receive the handle, a steel
spring, having on the under side a tooth or catch for the purpose of holding the
handle in its position.
The head of the said handle has. teeth formed on the outside, and in such a
manner that whichever way the handle is placed on the shaft, the spring catch fits
into the said teeth and thus prevents it working off.
When the handle is to be removed the spring catch must be lifted clear of
the teeth.
Or a steel spring may be secured to the shaft and be so formed to wrap over the
head of the handle.
Or cranked springs may be secured to the square end of the said shaft so that
when the handle is in position the crank or step in the spring prevents its
coming off.
Dated this 28th day of January 1890
GARLICK & MCGOWAN,
Agents for the Applicants.
COMPLETE SPECIFICATION (AMENDED).
An Improved Method of Securing the Handles of Cranes to
their Shafts.
We THOMAS HODDER HEARD, of 57 London Road Traveller and WILLIAM KIRKLEY
BIRKINSHAW of 9 Madeley Street both of Derby in the County of Derby do hereby
declare the nature of our said invention for "AN IMPROVED METHOD OF SECURING
THE HANDLES OF CRANES TO THE SHAFTS and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:-
"
The chief feature of this invention is in securing the handles of cranes to their

page_text: shafts when in use, thus preventing any accident to the operator or other person by
the said handle working off, also that the handle cannot be placed on the shaft
without automatically securing itself.
In the construction of this invention we form a spring either forged or flied out
of steel or made from coiled wire of any suitable section which is bent and secured
by suitable means on to the round portion of the crane shaft and next to the square
head to receive the handle and having attached at the end thereof a catch for the
purpose of holding the handle in its position.
The head of the said handle has may have teeth or serrated edges formed upon
the outside, and in such a manner that whichever way the handle is placed on the
shaft the spring catch fits into the said teeth and thus prevents its working off, or a
spring may be let into the square head as shewn in Fig. 10 of the accompanying
drawings, or springs secured to the head or shaft may be so formed to wrap over
the head of the handle to answer the above purpose.
When the handle is to be removed the spring catch must be lifted clear of the
teeth or handle head.
This invention can be attached at little cost to already existing cranes.
In further illustrating our invention the band which is stretched around the shaft
of the crane may have a hood or covering formed either separate or solid thereto
which is bent over as shewn at Fig. 12 and may have suitable holes punched or
formed in both sides so as to enable a rivet or projections to pass through upon
which the catch is pivoted and works, also a leaf or other suitable spring may be
placed and secured as desired between the said catch and the inner surface of the
said hood or covering for the purpose of operating the catch. The said leaf spring
may be turned downwards at its heel part to moderate the fall of the said catch or
a portion of the said hood or cover may likewise be dealt with, or the catch may
have a lug or projection formed upon its heel part for the same purpose, or any
other desired form of stop may be employed.
It is obvious that any portion of our invention may he manufactured of cast or
wrought material.
The accompanying drawings illustrate our invention the same letters of reference
apply to the different views.
Fig. 1 is a side elevation of a spring shewing the band A which fits around the
shaft having holes B to receive a bolt and nut. °C is the spring portion bent to a
slight camber.
Fig. 2 is an end view in elevation shewing the band A closed by means of the
bolt and nut B.
Fig. 3 is a side view in elevation shewing the catch D secured to the spring C.
Fig. 4 is the nut and bolt.
Figs. 5 and 6 are views shewing the spring with shoulders at E rising from the
back and front of the band, the catch may be rivetted on as shewn in Fig. 3.
Fig. 7 is a modified spring made from round oval or other shaped section of wire
coiled at F forming springs, through which passes a bolt at G and nips the band
tightly around the shaft of the crane. The catch has recesses formed at the sides to
receive the arms which are bent to form holes at H also a hole is formed in the
head of the catch through which is passed a rivet or screw to secure all together.
Fig. 8 is a view shewing the spring passed under and bent over the band and on
to the top of the spring, the said band having a recess at I to receive the spring
which is rivetted to the band.
Fig. 9 is a plan of Fig. 3.
Fig. 10 is a modification of spring and catch at J let into the square portion
of shaft.
Fig. 11 is a front view in elevation shewing the shaft K toothed handle Land
spring in position.
Fig. 12 is a side view in elevation shewing the hood or cover M attached to the
band A also spring N shewn in dotted lines secured to the cover by a rivet which
spring bears upon the catch C.

page_text: Fig. 13 is a plan shewing the band and cover as
otherwise.
nieu Out of Sheet SLOT ON
Fig. 14 is a plan shewing the catch C with projections to fit into the sides of the
cover or hood M.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
Firstly. An improved method of securing handles of cranes to their shafts by
constructing a spring made from either wrought or cast steel and secured by suitable
means on to the crane shaft having a tooth or catch either solid therewith or attached
thereto for the purpose of holding the handle in its position, or is otherwise formed
to wrap over the head of the handle the said catch may be cast solid and be operated
upon by a spring being either attached to a cover or hood and a band or strap
fastened around the shaft.
Secondly. In the construction of a spring for securing the handles to the shafts
of cranes having the spring or springs so formed either attached to or let into the
shaft or square head of the shaft.
Thirdly. In the construction of a spring for the above purpose formed of wire any
convenient section and to any design also in forming a catch having a cover or hood
over part or the whole of it as shewn in Figs. 7 and 12 of the accompanying
drawings working on a rivet pivot or projection which catch is operated upon by
means of a spring placed under the said cover-as hereinbefore specified described
and as illustrated by the accompanying drawings.
Dated this 5th day of November 1890.
WM. MGOWAN,
Agent for the Applicants.