Hydraulic and earth engineering – Marine structure or fabrication thereof – With anchoring of structure to marine floor
Patent
1986-07-28
1987-05-12
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With anchoring of structure to marine floor
114294, 367133, 405195, 441 2, B63B 2150
Patent
active
046645594
ABSTRACT:
A latch mechanism (release) for use in anchoring equipment and devices submerged in water, held closed by a permanent magnet and which can be automatically or remotely opened by diverting the magnetic field. The release is held closed by the magnetic attraction between a permanent magnet and a plate on a lever arm whose movement effects closure of the latch. A spring acts to move the lever arm and open the latch but the magnet normally overwelms it. The latch opens when a brief electromagnetic field is applied to a soft magnetic alloy which guides magnetic flux from the magnet to the plate on the latch. The brief electromagnetic field weakens the attraction between the magnet and the plate by diverting the magnetic flux through an alternate loop in the alloy material, and thus allows the spring on the lever arm to open the latch. The release is triggered by acoustic signals transmitted to it and which are processed by an internal acoustic transducer and electronic controller which, upon receipt of appropriate acoustic signals, supplies electrical current to a coil surrounding the magnetic alloy material. The release mechanism has a low power requirement, is simple and yet is strong when closed.
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patent: 4136415 (1979-01-01), Blockburger
patent: 4498814 (1985-02-01), Brake
Seastar Instruments Ltd.
Taylor Dennis L.
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