US3696360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impending condensation alarm
Assignee: Vapor Corp
•
Filing: 1971-06-16
•
Granted: 1972-10-03
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Expires: 1991-06-16
Abstract
Abstract Device for warning of impending condensation including a sensor in contact with the element being monitored to measure conductivity at the sensor, an alarm, and electrical circuitry responding to the sensor to trigger the alarm at a given temperature above dew point.
Inventors
- 👤 Wieslaw Gajewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:46
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/122
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
An impending condensation alarm comprising, a sensor adapted to be in contact with the element being monitored, said sensor including an insulating board having a pair of spaced conductors intimately mounted on one surface and exposed to ambient air, the other surface of said board being in contact with the element being monitored, an alarm, electrical circuit means measuring the conductivity of the insulating board surface through the spaced conductors to describe the relationship of the temperature of the one surface to the dew point temperature and to trigger the alarm when the resistance between the spaced conductors reaches a given value warning of impending condensation.
Claim 2
Dependent Claim
106 words
An impending condensation alarm comprising, a sensor adapted to be in contact with the element being monitored, said sensor including an insulating board having a pair of spaced conductors intimately mounted on one surface and exposed to ambient air, the other surface of said board being in contact with the element being monitored, an alarm, electrical circuit means measuring the conductivity of the insulating board surface through the spaced conductors to describe the relationship of the temperature of the one surface to the dew point temperature and to trigger the alarm when the resistance between the spaced conductors reaches a given value warning of impending condensation.
Claim 3
Dependent Claim
39 words
The combination of claim 1, and a metal support upon which the board is mounted to rigidify same and to contact directly the element being monitored, thereby also providing a thermal conductor between the board and element being monitored.
Claim 4
Dependent Claim
47 words
The combination of claim 1, wherein said electrical circuit means includes a multivibrator connected to the spaced conductors to apply an alternating current bias thereto, an operational amplifier receiving the output from the sensor, and a voltage doubler and rectifier receiving the output from the operational amplifier.
Claim 5
Dependent Claim
48 words
The combination of claim 1, wherein said spaced conductors include a plurality of conductor fingers spaced from each other such that the conductor fingers of one of the spaced conductors are interjacently arranged with the finger conductors of the other of the spaced conductors to define a grid.
Claim 6
Dependent Claim
29 words
The combination of claim 4, and a transistor switch between the alarm and the voltage doubler triggering when the voltage output of said voltage doubler reaches a given level.
References Cited (Backward Citations)
US2733607A
Cited
US2904995A
Cited
GB900194A
Cited
US3293901A
Cited
US3416356A
Cited
US3422677A
Cited
US3599862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |