IMPROVEMENTS IN TRAVELLING JIB CRANES
Year: 1879

page_text: LETTERS PATENT to Thomas Dixon, of Leeds, in the County of York, for the *
Invention of "IMPROVEMENTS IN TRAVELLING JIB CRANES."
Sealed the 4th May 1880, and dated the 6th November 1879,
PROVISIONAL SPECIFICATION left by the said Thomas Dixon at the Office
of the Commissioners of Patents on the 6th November 1879.
THOMAS DIXON, of Leeds, in the County of York. "IMPROVEMENTS IN TRAVELLING
JIB CRANES."
The object of this crane is to lift goods, and after being lifted to carry thein to
any required position in a warehouse, workshop, or other room or place.
The crane carriage is mounted on a pair of wheels, and is also provided with a
guide or steering wheel. To the crane carriage is attached a jib which can be
raised or lowered to any desired angle thereto, this being effected by a screw or
other suitable gearing. The gearing for raising and lowering purposes is also
mounted upon the carriage. The carriage is further so arranged that its weight on
one side of the centre of the wheels and the jib on the other can be made to counter
balance each other with or without the load, so that any required load can be raised
or lowered, and so balanced upon the wheels that it may be conveyed thereon to
any desired place.
The apparatus for raising and lowering purposes may be of ordinary con-
struction.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Dixon in the Great Seal Patent Office on the 6th May
1880.
THOMAS DIXON, of Leeds, in the County of York. "IMPROVEMENTS IN TRAVELLING
JIB CRANES."
The object of this crane is to lift "goods," and after being lifted to carry them to
any required position in a warehouse, workshop, or other room or place.
The crane carriage is mounted on a pair of wheels, and is also provided with a
guide or steering wheel. To the crane carriage is attached a jib which can be
raised or lowered to any desired angle thereto, this being effected by a screw or
other suitable gearing. The gearing for raising and lowering purposes is also
mounted upon the carriage. The carriage is further so arranged that its weight
on one side of the centre of the wheels and the jib on the other can be made to
counterbalance each other with or without the load, so that any required load can
be raised or lowered, and so balanced upon the wheels that it may be conveyed
thereon to any desired place.
The apparatus for raising and lowering purposes may be of ordinary con-
struction.
And in order that my Invention may be more completely understood reference is
given to the accompanying Drawings, and to the letters and marks of reference
thereon.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation, and Fig. 2 a plan looking at the top.
The crane carriage consist of the wrought iron sides a, which may either be
constructed of flat bar iron, as shewn, or when more strength is required of any
suitable formation of angle iron. The sides are stiffened and strengthened by the
intermediate bars, rods, or angle irons b. To the sides a are attached the metal
brackets c which are employed as bearings for the shaft c¹, on the outer ends of
which the wheels d are fitted, whereby "goods" after being lifted can be carried
to any required position in a warehouse, workshop, or other room or place. A guide
or steering wheel e is provided in bearings on the brackets e¹ attached to the "crab,"
this being also secured to the sides a of the carriage. The gearing f on the "crab"
is of ordinary construction, varying in accordance with the power required; f' is
the chain or rope barrel, and the chain or rope, all of ordinary construction.
The crane carriage is mounted on wheels d, so that with its weight on the side G
thereof and the jib H on the other (with or without the load) any required weight
can be raised or lowered and balanced upon the wheels, so that it may be conveyed
thereon to any desired place.
I prolong the framework of the carriage at I to act as a strut or stop, to obviate
the danger of overbalancing.
The jib H is raised or lowered to any desired angle, and is attached to a
crosshead J mounted on the wheel shaft c¹. The operation of raising or lowering
the jib H is effected through the medium of the hand wheel K, gearing 1, screw m,
nut n, to which is coupled the cross head J by means of rod or rods o. Any other
convenient known means may be employed for raising and lowering the jib H.
Having now described the nature of my said Invention, and described with the
aid of Drawings how the same may be carried into practice, I would have it under-
stood that I do not limit myself to the precise details or configuration of the parts
I have described and shewn, as the same may be varied or modified without

page_text: departing from the nature of my said Invention, but what I claim and desire to be
secured to me by Letters Patent is,―
First. The arrangement, construction, and application of jib crane, and the means
or apparatus whereby the jib H may be raised or lowered to any angle for balancing
purposes, and mere modifications of the same, substantially as herein set forth.
Second. The combination of the various parts forming the travelling jib crane,
and mere modifications of the same, substantially as and for purposes herein set
forth.
In witness whereof, I, the said Thomas Dixon, have hereunto set my hand and
seal, this Fifth day of May, in the year of our Lord One thousand eight
hundred and eighty.
THOR DIXON. (L.S.)