Patent US4918391A successfully refreshed from Google Patents.
US4918391A
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US
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Sodium content monitor having a unitary housing
Assignee: ENSEAL Inc A CORP OF FL
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Filing: 1988-03-17
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Granted: 1990-04-17
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Expires: 2008-03-17
Abstract
Abstract A salt sensor is disclosed which is portable and easily handled by a person at a restaurant or in his home for determining the sodium content of the food or beverage he is about to consume. The salt sensor includes a uniquely designed contact top which is electronically connected to a circuit which generates an AC signal. The strength of the signal transmitted across the contact tips is directly proportional to the conductivity of the food or beverage being tested and is, accordingly, registered on a display panel located on the body of the salt sensor.
Inventors
- 👤 Jeffrey M. Byrd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:09
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/02; G01N27/00; G01N27/02; G01N27/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
111 words
Apparatus for measuring the sodium content of foods or beverages comprising a unitary housing including a body portion and a probe portion, said body portion containing an electronic circuit for operating the apparatus, said probe portion having sensing contacts attached to an end thereof a liner member between said contacts and said probe portion whereby a substantially crevice-free arrangement is created between said contacts and said probe a switch attached to said housing for activating said electronic circuit said electronic circuit comprising an AC generator, an AC amplifier, an AC-DC convertor, and means for converting a signal from the AC-DC converter into a visual signal which is displayed on said housing.
Claim 2
Dependent Claim
111 words
Apparatus for measuring the sodium content of foods or beverages comprising a unitary housing including a body portion and a probe portion, said body portion containing an electronic circuit for operating the apparatus, said probe portion having sensing contacts attached to an end thereof a liner member between said contacts and said probe portion whereby a substantially crevice-free arrangement is created between said contacts and said probe a switch attached to said housing for activating said electronic circuit said electronic circuit comprising an AC generator, an AC amplifier, an AC-DC convertor, and means for converting a signal from the AC-DC converter into a visual signal which is displayed on said housing.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1, wherein said visually displayed signal comprises a plurality of LEDs, said LEDs being sequentially arranged to indicate in ascending order the amount of sodium per unit volume in the food or beverage being tested.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1, wherein said visually displayed signal comprises a direct reading digital number.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1, wherein said sensing contacts comprise two strips of metal with a space therebetween, each strip being electrically attached to said electronic circuit.
Claim 6
Dependent Claim
41 words
The apparatus of claim 4, wherein said sensing contacts each comprise a curved strip of metal assembled with the concave surface of each facing each other and said space therebetween comprises the space between adjacent ends of said strips of metal.
Claim 7
Dependent Claim
27 words
The apparatus of claim 5, wherein said curved sensing strips are each fitted into a cutout in the probe portion of the housing around the periphery thereof.
Claim 8
Dependent Claim
24 words
The apparatus of claim 6, wherein the outside convex surfaces of said curved strips fit flush with the outside periphery of said probe portion.
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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |