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US5066944A
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US
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Fluid detection system with relay release and relatch function
Assignee: Emerson Electric Co
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Filing: 1990-09-25
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Granted: 1991-11-19
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Expires: 2010-09-25
Abstract
Abstract A fluid status detection system includes a plurality of probes connected to a controller. The controller includes a number of relays that may be programmed to latch either open or closed upon receipt of any one of several different alarms from the probes. The system includes a function that if a relay is latched and a second alarm occurs, then the relay releases for a second, then relatches. The system permits an operator to select the release and relatch latch function individually for each of the relays and to store the selection in a digital memory.
Inventors
- 👤 Laurence S. Slocum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:55
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A fluid status detection system comprising: a controller and a plurality of probes for sensing the status of fluids at probe locations remote from the controller, each of said probes including means for providing a plurality of probe signals to said controller indicative of the fluid status at the probe location, said controller comprising: a relay; storage means for storing a plurality of latching conditions for said relay; latching means responsive to said probe signals and communicating with said means for storing for latching said relay upon receipt of a first probe signal corresponding to one of said latching conditions; release and relatch means for deactivating said relay automatically when said relay is latched and a second probe signal corresponding to the same said latching condition is received while the first probe signal is still present and for relatching said relay after a predetermined time corresponding to the second probe signal being present.
Claim 2
Dependent Claim
153 words
A fluid status detection system comprising: a controller and a plurality of probes for sensing the status of fluids at probe locations remote from the controller, each of said probes including means for providing a plurality of probe signals to said controller indicative of the fluid status at the probe location, said controller comprising: a relay; storage means for storing a plurality of latching conditions for said relay; latching means responsive to said probe signals and communicating with said means for storing for latching said relay upon receipt of a first probe signal corresponding to one of said latching conditions; release and relatch means for deactivating said relay automatically when said relay is latched and a second probe signal corresponding to the same said latching condition is received while the first probe signal is still present and for relatching said relay after a predetermined time corresponding to the second probe signal being present.
Claim 3
Dependent Claim
15 words
A fluid detection system as in claim 1 wherein said predetermined time is one second.
Claim 4
Dependent Claim
38 words
A fluid detection system as in claim 1 and further including selecting means for permitting an operator to select the release and relatch function individually for said relay and to store said selection in said means for storing.
References Cited (Backward Citations)
US4721950A
Cited
US4740777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |