US3897157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorimeter for fish lure selector
Assignee: ENERTRON CORP
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Filing: 1974-04-11
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Granted: 1975-07-29
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Expires: 1994-04-11
Abstract
Abstract A fish lure selector including a plurality of matched color filters and associated photocells encased in a waterproof housing and connected by a cable to a control circuit for providing a visual indication of the relative intensities of different colors of light below the surface of a body of water.
Inventors
- 👤 Mano Mclaughlin
- 👤 Andrew M Wohlert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:44
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J3/513
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A color analyzer for determining the presence of predetermined colors of light at varying depths in a body of water, comprising a hermetically sealed housing a plurality of light responsive photocells mounted within said housing, each of said photocells having a resistance which varies with the intensity of light impinging thereon, a plurality of light filters mounted within said housing and each constructed and positioned to direct light from 360* of the ambient onto a respective one of said cells, each of said cells and the associated one of said filters being selected to provide an electric signal in response to the presence of a respective one of said colors in the ambient light, a control circuit including visual readout means responsive to electric signals supplied thereto, and a watertight cable including a plurality of conductors donnected between said cells and said control unit.
Claim 2
Dependent Claim
144 words
A color analyzer for determining the presence of predetermined colors of light at varying depths in a body of water, comprising a hermetically sealed housing a plurality of light responsive photocells mounted within said housing, each of said photocells having a resistance which varies with the intensity of light impinging thereon, a plurality of light filters mounted within said housing and each constructed and positioned to direct light from 360* of the ambient onto a respective one of said cells, each of said cells and the associated one of said filters being selected to provide an electric signal in response to the presence of a respective one of said colors in the ambient light, a control circuit including visual readout means responsive to electric signals supplied thereto, and a watertight cable including a plurality of conductors donnected between said cells and said control unit.
Claim 3
Dependent Claim
18 words
A color analyzer according to claim 1 wherein said filters are circular discs stacked one upon the other.
Claim 4
Dependent Claim
32 words
A color analyzer according to claim 2 wherein each disc has an axially disposed conical recess in one face thereof, and a plurality of conical reflectors are respectively mounted in said recesses.
Claim 5
Dependent Claim
35 words
A color analyzer according to claim 3 wherein said cells each have a planar, light sensitive surface and are mounted with said surface facing toward the apex of the associated one of said conical recesses.
Claim 6
Dependent Claim
31 words
A color analyzer according to claim 4 wherein said visual readout means is a meter, and said control circuit includes a selector switch for selectively connecting said signals to said meter.
Claim 7
Dependent Claim
40 words
A color analyzer according to claim 5 wherein said control circuit includes an amplifier connected between said conductors and said meter, and selector means for setting the gain of said amplifier at selected ones of a plurality of predetermined values.
Claim 8
Dependent Claim
21 words
A color analyzer according to claim 6 wherein said control circuit is battery powered, and said meter is a DC ammeter.
References Cited (Backward Citations)
US2898800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |