US3689908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rate of flow alarm
Assignee: Individual
•
Filing: 1971-01-04
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Granted: 1972-09-05
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Expires: 1991-01-04
Abstract
Abstract A tapered-bore rate of flow meter is attached to the tubing connecting a source of dry gas to a telephone cable. A photo cell is attached to the rate of flow meter so if the ball of the flow meter interferes with the light source of the photo cell and a signal is produced. This signal is transmitted to a central point where a plurality of signal carriers are connected to a single alarm system. Thus, an excessive rate of flow into any one of a plurality of cables sets off an alarm.
Inventors
- 👤 Jimmy C Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:49
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/24; G01P; G01P13/00; G01P13/0006; G01P13/0013; G01P13/002; H; H02; H02G; H02G15/00; H02G15/20; H02G15/28; H02H; H02H5/00; H02H5/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
In a gas flow meter having a. a block of transparent material with b. a vertical tapered bore therein, c. an opaque ball in the bore, d. a gas inlet and outlet to the bore, e. means for illuminating the block of transparent material, f. a photo cell, and g. holding means on the block for holding the photo cell in the tapered bore h. so that the position of the ball changes the light upon the cell, thereby j. producing a signal output from said photo cell; k. the improved holding means for said photo cell comprising in combination with the above l. a tube which projects downward into the vertical tapered bore of said flow meter, and m. said photo cell being at the bottom of said tube.
Claim 2
Dependent Claim
130 words
In a gas flow meter having a. a block of transparent material with b. a vertical tapered bore therein, c. an opaque ball in the bore, d. a gas inlet and outlet to the bore, e. means for illuminating the block of transparent material, f. a photo cell, and g. holding means on the block for holding the photo cell in the tapered bore h. so that the position of the ball changes the light upon the cell, thereby j. producing a signal output from said photo cell; k. the improved holding means for said photo cell comprising in combination with the above l. a tube which projects downward into the vertical tapered bore of said flow meter, and m. said photo cell being at the bottom of said tube.
Claim 3
Dependent Claim
49 words
The invention as defined in claim 1 with the additional limitation of n. said tube extending through a seal at the top of aid tapered bore whereby said tube can be raised and lowered to adjust the position at Which the photo cell indicates the position of the ball.
Claim 4
Dependent Claim
23 words
The invention as defined in claim 2 with the additional limitation of o. alarm means connected to said detector for alarming maintenance personnel.
Claim 5
Dependent Claim
62 words
The invention as defined in claim 3 with the additional limitations of p. a plurality of said flow meters, q. one of said detectors on each flow meter, r. a wire, and s. isolation means on each detector for transmitting the electric signal from the detector to the wire, but preventing the transmission of a signal from the wire to the detector.
Claim 6
Dependent Claim
70 words
The invention as defined in claim 4 with the additional limitations of t. a network of cables, each cable having a sheath around it, u. a source of dry gas, v. tubing means connecting each cable to the source of dry gas for pressurizing each cable within its sheath with dry gas, w. said flow meter being within the tubing means connecting each cable to its source of dry gas.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |