US2561748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery electrolyte level indicator
Assignee: ERWIN W FROEHLICH
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Filing: 1950-02-14
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Granted: 1951-07-24
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Expires: 1970-02-14
Abstract
No abstract record available.
Inventors
- 👤 William P Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:21
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M10/484; H01M50/00; H01M50/50; H01M50/569; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A STORAGE BATTERY ELECTROLYTE LEVEL INDICATOR, A PLUG ADAPTED TO BE MOUNTED IN A BATTERY FILLER VENT, CONDUCTORS IN SAID PLUG FOR CONNECTION IN A CIRCUIT HAVING A WARNING DEVICE, SAID CONDUCTORS HAVING CONTACTS IN ELECTRICAL CONNECTION THEREWITH AND BIASED INTO MUTUAL ENGAGEMENT, AND AN ELECTROLYTE OPERATED FLOAT HAVING A NONCONDUCTIVE STEM NORMALLY SEPARATING SAID CONTACTS, SAID PLUG HAVING A VERTICAL BORE, AND SAID CONTACTS COMPRISING STRIPS OF SPRING METAL DIAMETRICALLY OPPOSITELY DISPOSED IN SAID BORE, SAID STEM BEING DISPOSED BETWEEN THE CONTACTS WHEN THE ELECTROLYE IS AT A PROPER LEVEL, SAID PLUG COMPRISING A BODY AND AN ENLARGE HEAD, AN ADAPTER VENT CAP CENTRALLY APERTURED TO RECEIVE SAID BODY, SAID PLUG HAVING DIAMETRICALLY OPPOSED SLOTS, SAID CONTACTS HAVING SHANKS EXTENDING INTO SAID SLOTS, SAID CONDUCTORS COMPRISING FLAT STRIPS OF METAL, AND SAID CONTACT SHANKS AND CONDUCTORS BEING CLAMPED BETWEEN SAID HEAD AND ON THE UPPER END OF SAID PLUG.
Claim 2
Dependent Claim
151 words
IN A STORAGE BATTERY ELECTROLYTE LEVEL INDICATOR, A PLUG ADAPTED TO BE MOUNTED IN A BATTERY FILLER VENT, CONDUCTORS IN SAID PLUG FOR CONNECTION IN A CIRCUIT HAVING A WARNING DEVICE, SAID CONDUCTORS HAVING CONTACTS IN ELECTRICAL CONNECTION THEREWITH AND BIASED INTO MUTUAL ENGAGEMENT, AND AN ELECTROLYTE OPERATED FLOAT HAVING A NONCONDUCTIVE STEM NORMALLY SEPARATING SAID CONTACTS, SAID PLUG HAVING A VERTICAL BORE, AND SAID CONTACTS COMPRISING STRIPS OF SPRING METAL DIAMETRICALLY OPPOSITELY DISPOSED IN SAID BORE, SAID STEM BEING DISPOSED BETWEEN THE CONTACTS WHEN THE ELECTROLYE IS AT A PROPER LEVEL, SAID PLUG COMPRISING A BODY AND AN ENLARGE HEAD, AN ADAPTER VENT CAP CENTRALLY APERTURED TO RECEIVE SAID BODY, SAID PLUG HAVING DIAMETRICALLY OPPOSED SLOTS, SAID CONTACTS HAVING SHANKS EXTENDING INTO SAID SLOTS, SAID CONDUCTORS COMPRISING FLAT STRIPS OF METAL, AND SAID CONTACT SHANKS AND CONDUCTORS BEING CLAMPED BETWEEN SAID HEAD AND ON THE UPPER END OF SAID PLUG.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |