US4055797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic conductance meter
Assignee: Devon Products Inc
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Filing: 1976-05-04
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Granted: 1977-10-25
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Expires: 1996-05-04
Abstract
Abstract A meter is provided for measuring the total parts per million dissolved solids in an electrolytic solution. The sensor for the meter is located on an upright probe on the face of a mount which is rotatably attached to the casing of the meter. Such a construction enables the sensor to be immersed directly into a batch of the solution while the casing is maintained in an upright position to enable the scale on the upper surface thereof to be viewed by the operator. In addition, a recessed circular opening is provided on the face of the mount about the upright probe to enable the threaded ends of sample bottles to be attached thereto.
Inventors
- 👤 Henry Doeleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:15
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02; G01R27/22; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; G01N27/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
In a portable meter for measuring the conductance of an electrolytic solution, the combination comprising: a casing; a meter movement in said casing including a pointer movable relative to a scale viewed through a window on the upper surface of said casing; an electrical circuit in said casing for controlling the movement of said pointer; and a mount having a hub rotatably mounted on the end of said casing, said mount including a recessed threaded circular opening on the face thereof with a probe arising from the center thereof having a pair of spaced electrodes connected to the electrical circuit, and said mount being rotatable on its hub such that the probe on the face thereof is in an upright position or a downward position relative to the scale as viewed from the upper surface of said casing.
Claim 2
Dependent Claim
138 words
In a portable meter for measuring the conductance of an electrolytic solution, the combination comprising: a casing; a meter movement in said casing including a pointer movable relative to a scale viewed through a window on the upper surface of said casing; an electrical circuit in said casing for controlling the movement of said pointer; and a mount having a hub rotatably mounted on the end of said casing, said mount including a recessed threaded circular opening on the face thereof with a probe arising from the center thereof having a pair of spaced electrodes connected to the electrical circuit, and said mount being rotatable on its hub such that the probe on the face thereof is in an upright position or a downward position relative to the scale as viewed from the upper surface of said casing.
Claim 3
Dependent Claim
30 words
The invention in accordance with claim 1 including a tubular well having one end thereof threaded for engagement on the recessed threaded circular opening on the face of said mount.
Claim 4
Dependent Claim
30 words
The invention in accordance with claim 1 including a sample bottle having a mouth end threaded for engagement on the recessed threaded circular opening on the face of said mount.
Claim 5
Dependent Claim
40 words
The invention in accordance with claim 1 including means on said hub for limiting the rotation of said mount when it is rotated to an upright position such that its face is parallel with the upper surface of said casing.
Claim 6
Dependent Claim
31 words
The invention in accordance with claim 4 wherein said means includes a cross-pin on said hub whose end extends to contact the casing to thereby limit the rotation of said mount.
Claim 7
Dependent Claim
218 words
In a portable meter for measuring the conductance of an electrolytic solution, the combination comprising: a casing; a meter movement in said casing including a pointer movable relative to a scale viewed through a window on the upper surface of said casing; an electrical circuit in said casing for controlling the movement of said pointer; and a mount having a hub rotatably mounted on the end of said casing, said mount including a recessed threaded circular opening on the face thereof with a probe arising from the center thereof having a pair of spaced electrodes connected to the electrical circuit; said electrical circuit including a battery, a standard resistance, and a pair of microswitches, said microswitches extending through openings in said cover, one of said microswitches providing for connecting said battery to energize said electrical circuit and the other of said microswitches providing for shunting said standard resistance across the pair of spaced electrodes in said electrical circuit whereby when said microswitches are simultaneously depressed said electrical circuit provides for moving said pointer to a predetermined point of said scale; and said mount being rotatable on its hub such that the probe on the face thereof is in an upright position or a downward position relative to the scale as viewed from the upper surface of said casing.
Claim 8
Dependent Claim
218 words
In a portable meter for measuring the conductance of an electrolytic solution, the combination comprising: a casing; a meter movement in said casing including a pointer movable relative to a scale viewed through a window on the upper surface of said casing; an electrical circuit in said casing for controlling the movement of said pointer; and a mount having a hub rotatably mounted on the end of said casing, said mount including a recessed threaded circular opening on the face thereof with a probe arising from the center thereof having a pair of spaced electrodes connected to the electrical circuit; said electrical circuit including a battery, a standard resistance, and a pair of microswitches, said microswitches extending through openings in said cover, one of said microswitches providing for connecting said battery to energize said electrical circuit and the other of said microswitches providing for shunting said standard resistance across the pair of spaced electrodes in said electrical circuit whereby when said microswitches are simultaneously depressed said electrical circuit provides for moving said pointer to a predetermined point of said scale; and said mount being rotatable on its hub such that the probe on the face thereof is in an upright position or a downward position relative to the scale as viewed from the upper surface of said casing.
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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |