Ships – Cable stoppers
Patent
1998-03-03
2000-02-01
Swinehart, Ed
Ships
Cable stoppers
B63B 2108
Patent
active
060190574
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
The present invention relates to a device on board a vessel for stopping and retaining either a link in a chain or a clamp on a wire, where the chain or wire is intended extend stretched between the vessel and, e.g., an anchor, comprising a grip and stop fork which is designed such that it may be brought up through the vessel deck to engage with said chain link or wire clamp, and where the opening between the outer section of the fork teeth may optionally be closed off with a locking bolt or similar means.
A device of the type introduced above is known from, for example, Danish Patent No. 260004. A somewhat more comprehensive variant of this known device is apparent from Norwegian Patent No. 152641.
Recently, however, a need has arisen for stopping and retaining devices capable of handling chain or wire having a diameter in the range of up to about 170 mm. The same stoppers must also be utilizable for chain or wire of a dimension down to about 50 mm. For this to be possible, such a device must not have too large a diameter, as a chain of small dimensions would otherwise risk being drawn down into the guide tube conduit of the stopping device. It is thus important that the distance between the teeth of the grip and stop fork be correctly gauged, and that the depth of the opening between the teeth be great enough to allow space for a chain having a diameter of 170 mm, and also that there be sufficient space for a locking bolt at the free end of the fork teeth.
According to the invention, the device introduced above is characterized in that the fork has a first, effective locking height above the deck of the vessel, defined by the bottom of the opening between the fork teeth and intended for a chain lying within a first size range, and a second, effective locking height above the vessel deck intended for chain or wire lying within a second, smaller size range, said second locking height being greater than said first locking height, and that the fork is designed with guide members and a shoulder for the mounting and securing of a U-shaped insert piece in the opening between the fork teeth, the bottom of said insert piece defining said second locking height. According to further embodiments of the device, it is advantageous that said guide members are tapered in the direction away from said shoulder, and that the shoulder is spaced a distance above the bottom of the fork opening.
It is advantageous that the U-shaped insert piece be provided at the free ends thereof with holes corresponding to axially arranged holes in the teeth of the fork for the optional insertion of a locking bolt on the insert piece.
The invention will now be explained in more detail with reference to the enclosed drawings.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a schematic elevational view of the device, according to the invention.
FIG. 2 is a view of the device of FIG. 1 along the line II--II.
FIG. 3 shows the device according to the invention with the U-shaped insert piece.
FIG. 4 is a view of the device of FIG. 3 along the line IV--IV.
FIG. 5 shows the device, according to the invention, being used with a chain of large dimension and employing one type of towing pins.
FIG. 6 shows a variant of FIG. 5, wherein the device, according to the invention, employs a second type of towing pins.
FIG. 7 shows the device, according to the invention, used with a U-shaped insert piece for smaller dimensions of chain.
FIG. 8 illustrates a top view of FIG. 1;
FIG. 9 illustrates an elevational view of a second embodiment of the present device;
FIG. 10 illustrates a top view of FIG. 9.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
In FIG. 1 is shown a grip and stop fork 1, with a chain 2 positioned in fork 1, where the chain has a diameter of about 170 mm, so that the distance d.sub.1 between the fork teeth 1', 1" is equal to or slightly greater than the maximum diameter of the chain. Fork 1 is designed so that the horizontal chain link, as indicated by reference numeral 2' in FIGS. 5 and 6, will rest against grip
REFERENCES:
patent: 4423697 (1984-01-01), Royset
patent: 4458631 (1984-07-01), Hystad
Bryns Patentkontor A/S
Swinehart Ed
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