Buoys – rafts – and aquatic devices – Buoy – With means to call buoy to surface
Patent
1986-03-19
1988-03-15
Peters, Jr., Joseph F.
Buoys, rafts, and aquatic devices
Buoy
With means to call buoy to surface
441 6, 441 23, 441 27, 116204, 24602, B63B 2200, G01D 512
Patent
active
047310367
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for indicating the presence in a fluid of an object consisting of material capable of being affected by a magnet, the device containing a magnet.
The principal object of the present invention is primarily to make available a device of the aforementioned kind which is simple and which permits the location and marking of a position of magnetisable metal objects in water beneath the surface of the water.
This object is achieved by a means of the aforementioned nature, which is characterized essentially in that a magnet exhibits an active surface capable of interacting with the submerged object and a floating body connected to the magnet in such a way as to be capable of being released from it, in conjunction with which there is present at least one ejector protrusion projecting beyond the active surface, so arranged that the ejector protrusion will endeavour, because of the nature of the interaction between the ejector protrusion and the object in question, to break the holding effect between the magnet and the floating body when the magnet is affected by the object in question.
The invention is described below as a number of preferred typical embodiments, in conjunction with which reference is made to the accompanying drawings, of which:
FIG. 1 shows a section through a first variant of an indicator device in the loaded state;
FIG. 2 shows said first variant of an indicator device in its released, active position;
FIG. 3 shows a second variant of an indicator device so arranged as to float in the fluid in its loaded position ready for release;
FIG. 4 shows a part of the second variant of an indicator device;
FIG. 5 shows a third variant of an indicator device which is so arranged as to be activated in two directions; and
FIG. 6 shows a stack of stored indicator devices.
The first variant of an indicator device 1, as shown in FIGS. 1 and 2, is intended primarily to be dropped into water 2 or some other fluid, thereby enabling an indication to be given of the presence of magnetisable metal object 3 or other objects which consist of a material capable of being affected by a magnet and which are completely immersed in the water 2 beneath the surface of the water. This variant is in the form of a magnet 4 which exhibits an active surface 4A capable of interacting with, and preferably capable of being attracted by or of interacting in some other way with the object 3, the presence of which it is wished to indicate, the magnet 4 most appropriately being annular and being capable of being accommodated in a holder 5 which may be open in one direction.
The indicator 1 also comprises a floating body 6 consisting of a suitable material, for example cork, plastic, wood or rubber, etc., and connected to the magnet 4 preferably by means of a line 7 attached at its respective ends 7A, 7B to the floating body 6 and the magnet 4. The line 7 may be capable of being accommodated inside a cavity 8 in the floating body 6 and may be capable of being wound around a bobbin 9.
The magnet 4 and the floating body 6 together form said indicator device 1, the joint density of which exceeds the density of the fluid 2 in which it is to be used.
At least one ejector protrusion 10, which projects with the device in its loaded position beyond said active surface 4A of the magnet 4, is present in the device 1. This protrusion 10 may most appropriately by formed by the free end of a pin 11 projecting from the floating body 6. The pin 11 is permanently attached to the floating body 6 and is capable of being accommodated in an opening 12 which fits said ejector means 10, 11, the opening 12 extending all the way through the magnet 4, although it may, as in the case of subsequently described variants, be split in a similar fashion to them. The ejector means 10, 11 together with the line bobbin 9 may appropriately form a common unit, as shown in the drawings, projecting from the inner end 8A of the cavity 8, and may consist of rubber or some other suitable material.
The ejector means 10, 11 is most appropria
REFERENCES:
patent: 3419927 (1969-01-01), Stoffer et al.
Brahan Thomas J.
Peters Jr. Joseph F.
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