Patent US2677797A successfully refreshed from Google Patents.
Patent US3284572A successfully refreshed from Google Patents.
US3284572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signalling device for the transmission of signals in the form of pulse trains
Assignee: Individual
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Filing: 1961-12-27
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Granted: 1966-11-08
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hesselgren Tore Gottfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:56
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04; G; G08; G08B; G08B23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN ELECTRICAL SIGNALLING DEVICE FOR THE AUTOMATIC TRANSMISSION OF SIGNALS IN THE FORM OF PULSE TRAINS OVER A TRANSMISSION CIRCUIT COMPRISING, IN COMBINATION, A ROTATABLE MEMBER CARRYING A NUMBER OF CONTACT SEGMENTS WHICH ARE CURVED CONCENTRICALLY ABOUT THE AXIS OF ROTATION OF THE ROTATABLE MEMBER; DRIVING MEANS FOR ROTATING SAID ROTATABLE MEMBER; A FIRST SLIDING CONTACT RESTING AGAINST A PART OF SAID ROTATABLE MEMBER WHICH CARRIES A SEQUENCE OF SAID CONTACT SEGMENTS DISPOSED WITH SPACINGS AT EQUAL RADIAL DISTANCE FROM THE AXIS OF ROTATION OF THE ROTATABLE MEMBER; A SECOND SLIDING CONTACT RESTING AGAINST A PART OF SAID ROTATABLE MEMBER WHICH CARRIES A FURTHER ONE OF SAID CONTACT SEGMENTS, SAID FURTHER CONTACT SEGMENT BEING GALVANICALLY CONNECTED WITH ALL OF THE CONTACT SEGMENTS OF SAID SEQUENCE OF CONTACTS SEGMENTS AND ARRANGED SO THAT SAID SECOND SLIDING CONTACT SLIDES OVER SAID FURTHER CONTACT SEGMENT AT THE SAME TIME AS SAID
Claim 2
Dependent Claim
148 words
AN ELECTRICAL SIGNALLING DEVICE FOR THE AUTOMATIC TRANSMISSION OF SIGNALS IN THE FORM OF PULSE TRAINS OVER A TRANSMISSION CIRCUIT COMPRISING, IN COMBINATION, A ROTATABLE MEMBER CARRYING A NUMBER OF CONTACT SEGMENTS WHICH ARE CURVED CONCENTRICALLY ABOUT THE AXIS OF ROTATION OF THE ROTATABLE MEMBER; DRIVING MEANS FOR ROTATING SAID ROTATABLE MEMBER; A FIRST SLIDING CONTACT RESTING AGAINST A PART OF SAID ROTATABLE MEMBER WHICH CARRIES A SEQUENCE OF SAID CONTACT SEGMENTS DISPOSED WITH SPACINGS AT EQUAL RADIAL DISTANCE FROM THE AXIS OF ROTATION OF THE ROTATABLE MEMBER; A SECOND SLIDING CONTACT RESTING AGAINST A PART OF SAID ROTATABLE MEMBER WHICH CARRIES A FURTHER ONE OF SAID CONTACT SEGMENTS, SAID FURTHER CONTACT SEGMENT BEING GALVANICALLY CONNECTED WITH ALL OF THE CONTACT SEGMENTS OF SAID SEQUENCE OF CONTACTS SEGMENTS AND ARRANGED SO THAT SAID SECOND SLIDING CONTACT SLIDES OVER SAID FURTHER CONTACT SEGMENT AT THE SAME TIME AS SAID
References Cited (Backward Citations)
GB674357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |