Improvements in Oranes.
Year: 1891

page_text: Date of Application, 29th Sept., 1891
Complete Specification Left, 28th June, 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Oranes.
I, ROGER WRIGHT, of Elswick Works, Newcastle-on-Tyne, Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in cranes and is applicable more
especially where it is required, in addition to lifting and lowering, to convey the
load horizontally over a considerable distance to or from the base of the crane.
The base of the crane may either be stationary or moveable along rails or other-
wise; it carries a pillar which may either be fixed to the base or capable of slewing
or turning on a pivot at its lower end.
The jib of the crane is composite and consists of a beam and a radius bar. The
radius bar is jointed to the pillar near its lower end; also at its other extremity it
is jointed to the beam at or near a point midway in its length.
The outer end of the beam carries a sheave over which the lifting chain_passes;
its inner end is jointed to a block which is able to slide in guides upon the crane
pillar. Hydraulic or other gear is provided to raise and lower the block upon the
pillar. It results from the construction that whilst the block with the heel of the
beam is being lowered the outer end of the beam travels away from the base of
the crane and in a horizontal line, on the other hand by raising the block the outer
end of the beam is caused to travel inwards or towards the base of the crane.
The lifting chain may be operated by hydraulic gear of the ordinary type
mounted upon the base of the crane or in the pillar; the lifting chain passes from
the crane base over guide pulleys at each extremity of the radius bar to the sheave
at the outer end of the jib beam.
This arrangement of the lifting chain renders the lifting tackle independent of the
position of the jib.
Hydraulic cylinders with telescopic rams may be used to raise and lower the
inner end of the jib beam thus the power exerted may be adapted to the varying
force required and the jib may be more or less counterpoised.
Dated this 29th day of September 1891.
CARF MAEL & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Cranes.
1, ROGER WRIGHT, of Elswick Works, Newcastle-on-Tyne, Engineer, 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 for its object improvements in cranes and is applicable more
especially where it is required, in addition to lifting and lowering, to convey the
load horizontally over a considerable distance to or from the base of the crane.
The base of the crane may either be stationary or moveable along rails or other-
wise; it carries a pillar which may either be fixed to the base or capable of slewing
or turning on a pivot at its lower end.
The jib of the crane is composite and consists of a beam and a radius bar. The
radius bar is jointed to the pillar near its lower end also at its other extremity it is
jointed to the beam at or near a point midway in its length.

page_text: beam is held to the pillar by guides along which, in the use of the crane, it travels up-
and down.
2. A crane substantially as described and represented in the annexed drawings.
Dated this 9th day of June 1892.
ROGER WRIGHT.