Improvements in Hand and Steam Derrick Cranes.
Year: 1891

page_text: Date of Application, 2nd Dec., 1891
Complete Specification Left, 31st Aug., 1892-Accepted, 8th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Hand and Steam Derrick Cranes.
We, JOHN GLEDHILL and EDWIN GLEDHILL, of St. Stephen's Ironworks,
Lindley, near Huddersfield, in the County of York, Engineers and Crane Makers,
do hereby declare the nature of this invention to be as follows:-
This invention has reference to prior Letters Patent granted to us, No. 4446,
dated 6th March 1884, and our present invention is intended to be used in com-
bination with the invention set forth in the prior Letters Patent named above. In
this particular description of jib crane, two barrels are employed, one to operate the
lifting chain or rope, and the other to operate the jib chain or rope. These two
barrels are so arranged that the chain barrel can be made to revolve without the
jib barrel, but they can be put into gear by the lateral movement of a lever pushing
studs through one barrel into holes in the other barrel, so that they become one,
and can revolve together.
As there were no means of indicating when the studs were opposite the holes, the
workman who operated the lever had to retain his hold thereof until the holes came
opposite the studs, into which they were forced by the pressure of the lever. The
object of our present invention in that particular class of jib crane is to indicate on
the periphery of both barrels the position of the holes and studs, so that when the
workman wishes to combine the two barrels, he need not operate the lever for
forcing the studs into the holes until he sees by the indications that the parts are
opposite.
Dated this 1st day of December 1891.
TASKER & CROSSLEY,
Halifax and Huddersfield, Agents.
COMPLETE SPECIFICATION.
Improvements in Hand and Steam Derrick Cranes.
We, JOHN GLEDHILL, and EDWIN GLEDHILL, of St. Stephen's Ironworks,
Lindley, near Huddersfield, in the County of York, Engineers and Crane Makers,
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 has reference to prior Letters Patent granted to us No. 4446,
dated 6th March 1884, and our present invention is intended to be used in com-
bination with the invention set forth in the prior Letters Patent named above.
In order that our invention may be better understood, we will now describe the
same more fully and for that purpose make reference to the accompanying sheet of
drawings illustrative thereof, wherein
Fig. 1 is elevation of such portions of a hand or steam derrick crane as is
necessary to shew the application thereto of our present improvements;
Fig. 2 is elevation looking in at the end of the barrel for lifting the chain or
rope, and
Fig. 3 is elevation looking in at the end of the other portion of the barrel for
lifting the jib chain or rope.
A is framework of the crane, B the ordinary driving wheels, C the lifting barrel,
and D the jib barrel, both of which are mounted upon the shaft E. These two
barrels C and D are so arranged that the chain barrel can be made to revolve in
either direction without the jib barrel, but the two can be put into gear like a clutch
[Price 8d l

page_text: and revolve together; to do this we have employed two horizontal bars G and H
connected at one end to the part marked I which in turn is connected by the short
arms J to lever K having its fulcrum at L so that on the operative moving the lever
in the direction of the arrow M the two rods G and H are made to enter suitable
holes N in the jib barrel whereby the two barrels are connected together.
Hitherto there has been no means of indicating when the two rods G and H were
opposite the holes in the jib barrel, consequently, when the workman moved the
hand lever K for the purpose of connecting the barrels, he had to retain his hold of
the said lever until the rods G and H came opposite the holes in the jib barrel
before the two could be connected.
The object of our present invention in that particular class of jib crane is to
indicate on the periphery of both barrels the position of the holes and studs, so that
when the workman wishes to combine the two barrels, he need not operate the lever
for forcing the studs into the holes, until he sees by the indications, that the parts
are opposite. To do this we indent or otherwise mark the rims or flanges of the
barrels as shewn at O in the accompanying drawings.
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 :-
The method substantially as herein shewn and described of marking or indicating
the chain and jib barrels for purposes set forth.
2000
TASKER & CROSSLEY,
Halifax, Agents.