Container exchanges between vessels

Abstract

A system to effect the exchange of containers by a floating crane between vessels changing draft respective the loading change of each. A means facilitates the spotting of the crane hoisting apparatus which includes an automatic locking arrangement engaging a container to the hoisting apparatus.

Description

Claims

1. In a system to transfer containers between vessels comprising:

(a) a terminal having a floating crane selectively positioned along a straight course between established limits;

(b) said floating crane, having a craneway disposed by towers above a catamaran type hull, accommodates the disposition of a trolley bearing a container for out-reaches to athwartship cells of vessels;

(c) said hull, having a range of displacements, may provide varied buoyant support by the pontoon formed catamaran hull;

(d) an arrangement of piling disposes a vessel to each side of hull;

(e) said vessels have uniform cell accommodations with a selected cell of each vessel disposed beneath said craneway;

(f) a hoist system, extending between said out-reaches, accommodates a selected elevation of a spreader frame held as a pendant with said disposition of the trolley; an improved arrangement to content with the spotting above and engagement together of said spreader frame and a container as two bodies being one, comprising:

(1) spotting means suitably arranged around the spreader frame, as protruding angularly beneath and retractable appendages, negate the sway tending pendant like body with lowering by the hoist system to an initial contact between common corner match-fit fixtures and castings for said engagement;

(2) locking means cocked to be set measurably after seating of said engagement depends upon the trigger release of a compression spring acting on a double acting toggle joint to force bolts home to lock said bodies together;

(3) retracting means for said appendanges includes a rack and pinion train to multiply the force of a solenoid powering the appendages assembly; and,

(4) cocking means for said bolt depends on a solenoid to activate the said toggle joint as arranged to be most powerful when needed to overcome inertia and friction resisting forces.

2. As in claim 1, an improved arrangement to content with the exchange of containers between vessels which may vary elevationally between vessels with change in loading of vessels while timing the use of said appendages, comprising:

(a) said hoisting system, depending on a single row wrap of wires on drums being powered to raise and lower said spreader frame, maintains a constant relationship between turns of said drums and the distance the spreader frame is below said craneway;

(b) detector means mobily mounted on said towers converts individual elevational changes of a vessel with said hull to rotary motion of a selsyn transmitter shaft;

(c) selsyn receiver means, establish the position of a vane operated limit switch to relate a hoist elevation above the respective vessel having varying draft, have shaft extensions fitted with pinion gears;

(d) extended shaft means, gear connected to shaft of said drums, make less than one full turn for the full elevational change of the spreader;

(e) said limit switches, made electrically active by a vane disposed in a gap formed in the switch body, depends on a vane extension of a hub fixed to said extended shaft and a disk fitted but with bearing clearance mounting around said extended shaft supporting said switch body for alignment of said gap with said vane;

(f) said disk, having its peripery formed as a gear, meshes with said pinion gear to locate the position of the switch body gap corresponding with the change of the vessel elevation respective said hull as transmitted by the selsyn system; and,

(g) operating means to power the trolley and hoist system establishes a container position with said switch means timed to attend said spotting means as needed.