Spring for Preventing the Handles of Cranes from Flying off in Use.
Year: 1890

page_text: Date of Application, 18th Sept., 1890
Complete Specification Left, 18th June, 1891-Accepted, 25th July,
1891
PROVISIONAL SPECIFICATION.
Clip Spring for Preventing the Handles of Cranes from Flying off
in Use.
I, JAMES DICKSON of Waverley Works Effingham Road Sheffield Yorkshire,
Steel Manufacturer, do hereby declare the nature of this invention to be as
follows:-
Frequent accidents having been caused by the handles of cranes flying off &
injuring those working them. I have invented a clip spring to be attached to the
crane which will entirely obviate the possibility of the handle flying off.
My invention consists of a lever catch A Fig. 1. working on a centre G Fig. 1.
forced into position by a spring B Fig. 1. this spring being fixed on a peg E
Fig. 1. on the lever catch A & another peg F. Fig. 1. rivetted onto the top of the
casing. All the working parts are enclosed in a case attached to a band C Fig. 1.
clamped around the axle of the crane as shown in detail in Fig. 5. the band being
held rigidly in position by sinking a peg A Fig. 5 into the axle & by 2 bolts as
shown in Fig. 5.
In Fig. 1. the spring is shown with one of the sides of the case turned back so
that the internal arrangements of my invention can be seen."
...
Fig. 2 shows another arrangement of the same idea but in this instance the
spring acts on a tongue A. Fig. 2 & this tongue reacts on the catch forcing it into
position.
Fig. 3 shows a similar arrangement of the tongue & catch as in Fig. 2 but
instead of a small spiral spring a straight or slightly curved spring A Fig. 3 acts
on the tongue exerting the necessary strength onto the catch to force it into
position.
I claim as my invention the application of springs in the manner as shown
combined with the lever catch, as a certain means of preventing the handles of the
cranes from flying off while my invention is attached to the crane.
I do not claim the mode of attachment to the axle except so far as refers to the
peg A Fig. 5.
Having fixed my invention to the axle of the crane in the manner described,
on pressing back the lever of the catch the lip of the catch is raised clear of the
handle of the crane enabling it to be readily put on or taken off as may be
required.
The advantages I claim for my invention are:-
1. Security to life & property by the prevention of the handles flying off.
2. The springs cannot be overstretched so that the catch will not come back into
position & fail to act. When the handle of the crane has been put on it is
impossible to remove it except by the combined opposite actions of pressing back
the 'lever & at the same time pulling off the handle & no such action can take
place in the ordinary working of the crane.
3. The readiness & ease with which the handles of the cranes can be put on &
taken off.
il.
Dated this Seventeenth day of September 1890.

page_text: COMPLETE
SPECIFICATION.
Clip Spring for Preventing the Handles of Cranes from Flying Off
in Use.
I, JAMES DICKSON of Waverley Works Effingham Road Sheffield Yorkshire
Steel Manufacturer, 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 :—
To prevent the handles of cranes flying off & injuring those working them I have
invented a safety catch to be attached to the crane which will entirely obviate the
possibility of the handle flying off.
My invention consists of a lever catch A Fig. 1. working on a centre G Fig. 1.
forced into position by a spring B Fig. 1. This spring is fixed on the peg E
Fig. 1 or the lever catch A & another peg F Fig. 1. rivetted onto the top of the
casing.
All the working parts are enclosed in a case attached to a band C Fig. 1.
clamped around the axle of the crane as shown in detail in Fig. 5. the band being
held rigidly in position by sinking a peg A. Fig. 5 into the axle & by 2 bolts as
shown in Figure 5.
In Fig. 1. the spring is shown with one of the sides of the case turned back so
that the internal arrangements of my invention can be seen.
Fig. 2 shows another arrangement of the same idea but in this instance the
spring acts on a tongue A Fig. 2. & this tongue re-acts on the catch forcing it into
position.
Fig. 3 shows a similar arrangement of the tongue & catch as in Fig. 2. but
instead of a small spiral spring a straight or slightly curved spring A Fig. 3 acts
on the tongue exerting the necessary strength onto the catch to force it into
position.
Having fixed my invention to the axle of the crane in the manner described, on
pressing back the lever of the catch the lip is raised clear of the handle of the
crane, enabling it to be readily put on or taken off as may be required.
Having now particularly described & ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The application of springs in the manner as shown combined with the lever
catch, as a certain means of preventing the handles of the cranes from flying off
while my invention is attached to the crane. I do not claim the mode of attach-
ment to the axle except so far as refers to the peg A Fig. 5.
2. Security to life & property by the prevention of the handles from flying off.
3. The springs cannot be overstretched so that the catch will not come back
into position & fail to act. When the handle of the crane has been put on it is
impossible to remove it except by the combined opposite actions of pressing back
the lever & at the same time pulling off the handle & no such action can take place
in the ordinary working of the crane.
4. The readiness & ease with which the handles of the cranes can be put on &
taken off.
Dated this Seventeenth der of Iun 1001
JAMES DICKSON.