US3293391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral bimetal operated coolant level switch
Assignee: Motors Liquidation Co
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Filing: 1965-01-26
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Granted: 1966-12-20
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 Marvin T Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/52; H01H37/56; G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A FLUID LEVEL INDICATOR COMPRISING: A SWITCH BODY; FIRST TERMINAL MEANS CARRIED THROUGH ONE WALL OF SAID SWITCH BODY AND ADAPTED TO CONDUCTIVELY ENGAGE A POWER SOURCE; SECOND TERMINAL MEANS CARRIED IN ONE WALL OF SAID SWITCH BODY AND ADAPTED TO ELECTRICALLY ENGAGE AN INDICATOR LIGHT, SAID SECOND TERMINAL MEANS HAVING A CONDUCTIVE PORTION EXPOSED WITHIN SAID SWITCH BODY; CONTACT MEANS PIVOTALLY SUPPORTED BY SAID SWITCH BODY AND INCLUDING TWO OUTWARDLY PROJECTING RESILIENT LEGS, A FIRST OF SAID LEGS SELECTIVELY ENGAGING THE EXPOSED PORTION OF THE SECOND TERMINAL, A SECOND OF SAID RESILIENT LEGS BEING ARRANGED TO MAINTAIN A CONDUCTIVE RELATIVESHIP BETWEEN SAID SWITCH BODY AND A GROUND; AND TEMPERATURE RESPONSIVE MEANS CARRIED BY SAID CONTACT MEANS AND INCLUDING A PORTION IN CONDUCTIVE ENGAGEMENT WITH THE FIRST TERMINAL SAID TEMPERATURE RESPONSIVE MEANS HAVING MEANS ARRANGED TO PIVOT SAID CONTACT MEANS IN RESPONSE TO A RAISING OF TEMPERATURE OF A FLUID THEREBY MOVING A FIRST OF SAID OUTWARDLY PROJECTING LEGS INTO CONDUCTIVE ENGAGEMENT WITH THE SECOND TERMINAL PROVIDING THEREBY A GROUND FOR THE LIGHT CONNECTED THERETO.
Claim 2
Dependent Claim
175 words
A FLUID LEVEL INDICATOR COMPRISING: A SWITCH BODY; FIRST TERMINAL MEANS CARRIED THROUGH ONE WALL OF SAID SWITCH BODY AND ADAPTED TO CONDUCTIVELY ENGAGE A POWER SOURCE; SECOND TERMINAL MEANS CARRIED IN ONE WALL OF SAID SWITCH BODY AND ADAPTED TO ELECTRICALLY ENGAGE AN INDICATOR LIGHT, SAID SECOND TERMINAL MEANS HAVING A CONDUCTIVE PORTION EXPOSED WITHIN SAID SWITCH BODY; CONTACT MEANS PIVOTALLY SUPPORTED BY SAID SWITCH BODY AND INCLUDING TWO OUTWARDLY PROJECTING RESILIENT LEGS, A FIRST OF SAID LEGS SELECTIVELY ENGAGING THE EXPOSED PORTION OF THE SECOND TERMINAL, A SECOND OF SAID RESILIENT LEGS BEING ARRANGED TO MAINTAIN A CONDUCTIVE RELATIVESHIP BETWEEN SAID SWITCH BODY AND A GROUND; AND TEMPERATURE RESPONSIVE MEANS CARRIED BY SAID CONTACT MEANS AND INCLUDING A PORTION IN CONDUCTIVE ENGAGEMENT WITH THE FIRST TERMINAL SAID TEMPERATURE RESPONSIVE MEANS HAVING MEANS ARRANGED TO PIVOT SAID CONTACT MEANS IN RESPONSE TO A RAISING OF TEMPERATURE OF A FLUID THEREBY MOVING A FIRST OF SAID OUTWARDLY PROJECTING LEGS INTO CONDUCTIVE ENGAGEMENT WITH THE SECOND TERMINAL PROVIDING THEREBY A GROUND FOR THE LIGHT CONNECTED THERETO.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |