# US 6,091,443 A · Underwater viewing system

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- Number: US 6,091,443 A
- Document ID: US6091443A
- Status: Granted
- Kind: A
- Application number: 08/812,442
- Filed: 1997-03-06
- Granted: 2000-07-18
- Earliest claimed: 1997-03-06
- Assignees: Walker Downriggers, Inc.
- Inventors: Randolph K. Ford; Michael G. Blowers
- Web page: https://patentgrep.com/patent/US6091443A

## CPC

- H04N 7/18: Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- A01K 91/08: Trolling devices
- D07B 1/147: {comprising electric conductors or elements for information transfer (D07B1/145 takes precedence)}
- H01B 7/045: {attached to marine objects, e.g. buoys, diving equipment, aquatic probes, marine towline}
- H01B 7/226: {Helicoidally wound metal wires or tapes}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- D07B: ROPES OR CABLES IN GENERAL (joining ropes or cables to one another or to other objects B65H69/00, F16G11/00; {mountaineering ropes A63B29/02}; mechanical finishing or dressing of ropes D02J; {braiding D04C}; decorative ropes or cords D04D; suspension cables for bridges E01D19/16; specially adapted for driving, or for being driven by, pulleys or other gearing elements F16G9/00; electric cables or joints insofar as electrical aspects are essential H01B, H01R)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})

## Abstract

An underwater viewing system suitable for providing images of an area around an underwater lure is described. The system includes a video camera coupled, via a cable, to a display. The cable has a plurality of electrical leads twisted about, and electrically isolated from, each other. Surrounding the electrical leads is an outer shield comprised of a plurality of stainless steel strands. The shield, and thus the cable, has an outer diameter less than 0.070 inches.

## Claims

### Claim 1

An underwater viewing system for viewing underwater objects comprising:
(a) a cable for transmitting video signals and comprising:
(i) at least two conductive leads twisted about each other, said conductive leads being electrically isolated from each other; and
(ii) an outer shield spirally surrounding said conductive leads, said outer shield comprising a plurality of strands of stainless steel, and said outer shield having a free end;
(b) an underwater camera assembly attached to said free end of said cable whereby the camera assembly is capable, of imaging a fishing lure;
(c) a weight attached by a safety cable to said underwater camera assembly; and
(d) a fishing line release removably attached to said camera assembly.

### Claim 2 (depends on 1)

The underwater viewing system of claim 1, wherein said outer shield comprises about twelve strands of stainless steel.

### Claim 3 (depends on 1)

The underwater viewing system of claim 1, further comprising a camera within said underwater camera assembly for generating composite video signals of said underwater objects and a driver responsive to said composite video signals for transmitting differential signals related to said composite video signals onto said conductive leads.

### Claim 4 (depends on 3)

The underwater viewing system of claim 3, further comprising a compressor within said underwater camera assembly and coupled between said camera and said driver for condensing said composite video signals into compressed video signals.

### Claim 5 (depends on 3)

The underwater viewing system of claim 3, further comprising a voltage regulator coupled to at least one of said conductive leads for supplying said camera with a supply voltage.

### Claim 6 (depends on 3)

The underwater viewing system of claim 3, further comprising a receiver coupled to said conductive leads and responsive to said differential signals for generating a receiver output signal, and a display driver responsive to said receiver output signal for generating a display signal related to said composite video signals.

### Claim 7 (depends on 6)

The underwater viewing system of claim 6, further comprising a video peaking compensation circuit responsive to said receiver output signal for producing rectified video output signals of said underwater objects.

### Claim 8 (depends on 6)

The underwater viewing system of claim 6, further comprising a decompressor coupled between said display driver and said receiver for extracting video signals of said underwater objects from said receiver output signals.

### Claim 9 (depends on 6)

The underwater viewing system of claim 6, further comprising a frame compare circuit responsive to said receiver output signal for comparing frames of said underwater objects and generating an indicator signal and an audible alarm device responsive to said indicator signal for generating an audible warning.