IMPROVEMENTS IN HAND AND STEAM DERRICK CRANES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We JOHN GLEDHILL and EDWIN GLEDHILL of St Stephen's Works, Lindley,
near Huddersfield in the County of York, Engineers, and Crane Makers, do
hereby declare the nature of our invention for "IMPROVEMENTS IN HAND AND
STEAM DERRICK CRANES," to be as follows:-
The main features and improvements in this Invention consist in placing the
lifting barrel and the jib adjusting barrel both on one and the same shaft whether
applied to steam or hand derrick Čranes.
The lifting barrel is fast on the said shaft and the jib adjusting barrel is placed
loosely thereon.
The end of the jib adjusting barrel is placed close against the end of the lifting
barrel, and the wire lifting ropo or chain is arranged to wind on or off one side
of the hoisting barrel and the jib adjusting. rope or chain is arranged to wind on
or off the opposite side of the jib adjusting barrel, consequently one barrel winds
off, and the other barrel winds on when the barrels are both revolving for raising or
lowering the jib. This arrangement dispenses with two wheels and simplifies the
machine, and when the two barrels are locked together the jib can be either raised
or lowered.
In consequence of the lifting rope or chain being on one side of the barrel, and
the jib adjusting rope or chain on the other side, all the strain is brought direct
on the two barrels without having jibbing gear wheels to bear the strain as at
present.
When the jib barrel is required out of motion, it is locked by means of a stud
sliding through the frame into the jib barrel flanges, and the two sliding studs
within the lifting barrel employed to lock the jib barrel and lifting barrel together,
can be drawn back by means of a lever at one end of the lifting barrel. This lever
is connected by a horizontal safety bar to the jib adjusting barrel locking stud so
that the said stud can not be withdrawn without the two studs being first slided
into the jib barre), thereby locking the two barrels together.
Dated this first day of Fohm 1001

page_text: We, JOHN GLEDHILL and EDWIN GLEDHILL of St Stephen's Works, Lindley,
near Huddersfield in the County of York, Engineers, and Crane Makers do
hereby declare the nature of our invention for "IMPROVEMENTS IN HAND AND
STEAM DERRICK CRANES," and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
The main features and improvements in this invention consist in placing the
lifting barrel and the jib adjusting barrel both on one and the same shaft whether
applied to steam or hand derrick cranes, and in the means of connecting and
disconnecting same for purpose of application as and when required.
In order that our Invention may be better understood, we herein give reference
to the accompanying Sheet of drawings, wherein Fig 1 is elevation, Fig 2 section,
and Fig 3 and 4 end views of so much of a derrick crane as is necessary to
illustrate our improvements. A is the lifting barrel, and B the jib barrel both
of which are placed upon the shaft C, the former being made fast thereon, and
the latter loose as will be seen. These two barrels are so arranged that the lifting
barrel A can be worked, whilst the jib barrel B is stationary, but when required
they can be immediately connected and made to rotate together, and this is effected
by means of two horizontal rods D, which are connected to the flanged boss E, and
caused to slide backward, and forward upon the shaft C by means of lever F, whose
fulcrum is at G.
The upper end of this lever passes through a slotted plate J, (see plan view
Fig 5) fastened to the bar K. carrying at the opposite end a stud L, which enters,
as hereinafter explained into notches formed in the flange M of the jib barrel B
for the purpose of keeping the said barrel stationary, and to prevent its rotation.
When it is necessary for the lifting barrel to rotate without the jib barrel the
stud L is in one of the notches of the jib barrel plate, and the rods D are in the
position shewn in the drawings, but when it is necessary to have the two barrels
connected, the workman pushes the bar K in the direction of the arrow, the effect
of which motion withdraws the stud L from the flange M and causes the rods D to
Blide into holes a made in the end of the jib barrel, by which means it is carried
around by the lifting barrel which barrel receives its motion from gear wheels O
and P operated in the usual manner by handles R, or other motive power, and
when the barrels require disconnecting the workman pushes the bar K back again
into its former position, when the stud L again enters one of the notches in flange M
and the rods D are removed from the holes a in the jib barrel.
It must be understood that in which ever direction the bar K is slided that the
stud L and rods D are always moved in the same direction, so that the locking
and unlocking of the barrels are always simultaneous. S is a brake pulley having
a strap T passing around it, and connected to the lever U which can be easily
applied by the workman at any time required and V is a gear catch for keeping
the pinion wheel in position by taking into the grooved boss W keyed on the main
driving shaft X such devices being commonly used in cranes.
The chain passing around the winding barrel, and the chain passing around the
jib barrel are so arranged that when the barrels are connected and both rotating
that one of such chains will be winding on, and the other unwinding as illustrated
in Fig 6, consequently the strain is on the barrels instead of on the shafts or wheels
as at present.
By the employment of the two barrels A and B upon one shaft, and the manner
of locking and unlocking the same, two gear wheels formerly employed are
disnensed with and the crane simulifed themh

page_text: 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;
When two barrels are working upon one shaft, the employment of the rods D
and stud L together with the means of operating same for purposes substantially
as shewn and described.