US3876312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water turbidity measuring apparatus
Assignee: Fishmaster Products Inc
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Filing: 1973-08-13
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Granted: 1975-04-08
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Expires: 1993-08-13
Abstract
Abstract A water turbidity measuring apparatus to determine light level at various depths relative to ambient surface light for determining optimum fishing depth, said apparatus comprising a light sensitive device, a control means for determining and displaying percentage of light present at the light sensitive device with respect to the surface light, flexible cable means connecting control means to the light sensitive device and linear measurement means to determine the depth of the light sensitive device within the water.
Inventors
- 👤 Jr Larry L Harcrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:04
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/85; G01N21/8507
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A water turbidity measuring apparatus for determining light intensity level at various depths of water, for determining optimum fishing depths and comprising: weighted light sensitive photoamplifier probe; portable light weight control means for determining and displaying light intensity at the probe, said means comprising a housing having probe storage means attached thereto, meter carried by the housing for displaying light intensity level at the probe, adjustment means operably connected to the meter for adjusting said meter in accordance with a reference light source and power cell carried by the housing and operably connected to the meter; flexible cable means having a plurality of spaced linear measurement markers secured therealong, said cable means being operably connected between the probe and the control means for operably connecting the said probe in series with the power cell and the marker.
Claim 2
Dependent Claim
137 words
A water turbidity measuring apparatus for determining light intensity level at various depths of water, for determining optimum fishing depths and comprising: weighted light sensitive photoamplifier probe; portable light weight control means for determining and displaying light intensity at the probe, said means comprising a housing having probe storage means attached thereto, meter carried by the housing for displaying light intensity level at the probe, adjustment means operably connected to the meter for adjusting said meter in accordance with a reference light source and power cell carried by the housing and operably connected to the meter; flexible cable means having a plurality of spaced linear measurement markers secured therealong, said cable means being operably connected between the probe and the control means for operably connecting the said probe in series with the power cell and the marker.
Claim 3
Dependent Claim
34 words
A water turbidity measuring apparatus as in claim 1 wherein the meter is graduated from 0 to 100 percent for representing the percentage of light at the probe relative to the reference light source.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |