Patent US3109415A successfully refreshed from Google Patents.
US3109415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid level detector and method
Assignee: Scully Signal Co
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Filing: 1958-11-19
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Granted: 1963-11-05
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Expires: 1978-11-19
Abstract
No abstract record available.
Inventors
- 👤 William G Rowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:02
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0007; F; F22; F22B; F22B37/00; F22B37/02; F22B37/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
APPARATUS FOR DETECTING A PREDETERMINED LEVEL OF LIQUID IN A HEATING SYSTEM BOILER HAVING, IN COMBINATION, A BURNER ARRANGED TO HEAT THE LIQUID IN THE BOILER WHEN RENDERED EFFECTIVE, A CONDUIT HAVING AN INLET AND AN OUTLET IN COMMUNICATION WITH THE INTERIOR OF THE SAID BOILER, THE SAID CONDUIT INLET BEING POSITIONED SO THAT IT WILL BE IN COMMUNICATION WITH THE LIQUID IN THE BOILER AT THE SAID PREDETERMINED LEVEL, MEANS ADAPTED TO POSITIVELY DRAW LIQUID FROM THE BOILER AT THE SAID INLET AND TO CIRCULATE THE BOILER LIQUID THROUGH THE SAID CONDUIT FROM THE SAID INLET TO THE SAID OUTLET AND MEANS LOCATED AT SAID CONDUIT BETWEEN SAID DRAWING AND CIRCULATING MEANS AND SAID OUTLET AND RESPONSIVE TO THE DYNAMIC FORCE OF THE LIQUID FLOW THROUGH SAID CONDUIT FOR RENDERING SAID BURNER EFFECTIVE TO HEAT SAID BOILER ONLY WHEN SAID BOILER LIQUID IS CIRCULATING THROUGH SAID CONDUIT, THEREBY INDICATING THAT THE BOILER LIQUID IS AT LEAST AT THE PREDETERMINED LEVEL.
Claim 2
Dependent Claim
161 words
APPARATUS FOR DETECTING A PREDETERMINED LEVEL OF LIQUID IN A HEATING SYSTEM BOILER HAVING, IN COMBINATION, A BURNER ARRANGED TO HEAT THE LIQUID IN THE BOILER WHEN RENDERED EFFECTIVE, A CONDUIT HAVING AN INLET AND AN OUTLET IN COMMUNICATION WITH THE INTERIOR OF THE SAID BOILER, THE SAID CONDUIT INLET BEING POSITIONED SO THAT IT WILL BE IN COMMUNICATION WITH THE LIQUID IN THE BOILER AT THE SAID PREDETERMINED LEVEL, MEANS ADAPTED TO POSITIVELY DRAW LIQUID FROM THE BOILER AT THE SAID INLET AND TO CIRCULATE THE BOILER LIQUID THROUGH THE SAID CONDUIT FROM THE SAID INLET TO THE SAID OUTLET AND MEANS LOCATED AT SAID CONDUIT BETWEEN SAID DRAWING AND CIRCULATING MEANS AND SAID OUTLET AND RESPONSIVE TO THE DYNAMIC FORCE OF THE LIQUID FLOW THROUGH SAID CONDUIT FOR RENDERING SAID BURNER EFFECTIVE TO HEAT SAID BOILER ONLY WHEN SAID BOILER LIQUID IS CIRCULATING THROUGH SAID CONDUIT, THEREBY INDICATING THAT THE BOILER LIQUID IS AT LEAST AT THE PREDETERMINED LEVEL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |