Patent US3302194A successfully refreshed from Google Patents.
US3302194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trace reading devices
Assignee: Westland Group PLC
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Filing: 1964-03-06
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Granted: 1967-01-31
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Expires: 1984-03-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Green
- 👤 Raby Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:24
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/34; H03M1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
APPARATUS FOR DETERMINING THE POSITION OF A POINT ON A CHART COMPRISING ELECTRICAL CONDUCTORS SPACED APART TO PERMIT AT LEAST PART OF A PENETRABLE CHART TO BE POSITIONED THEREBETWEEN, AN IMPEDANCE CONNECTING SAID ELECTRICAL CONDUCTORS, MEANS FOR DIVIDING THE IMPEDANCE BY ESTABLISHING AN ELECTRICAL CONNECTION BY PENETRATION THROUGH THE CHART AT A POINT THEREON, AND A VARIABLE IMPEDANCE DEVICE FOR STRIKING A BALANCE BETWEEN THE DIVIDED PORTIONS OF THE IMPEDANCE DETERMINED BY SAID IMPEDANCE DIVIDING MEANS, THE BALANCE DETERMINING THE POSITION OF THE POINT.
Claim 2
Dependent Claim
84 words
APPARATUS FOR DETERMINING THE POSITION OF A POINT ON A CHART COMPRISING ELECTRICAL CONDUCTORS SPACED APART TO PERMIT AT LEAST PART OF A PENETRABLE CHART TO BE POSITIONED THEREBETWEEN, AN IMPEDANCE CONNECTING SAID ELECTRICAL CONDUCTORS, MEANS FOR DIVIDING THE IMPEDANCE BY ESTABLISHING AN ELECTRICAL CONNECTION BY PENETRATION THROUGH THE CHART AT A POINT THEREON, AND A VARIABLE IMPEDANCE DEVICE FOR STRIKING A BALANCE BETWEEN THE DIVIDED PORTIONS OF THE IMPEDANCE DETERMINED BY SAID IMPEDANCE DIVIDING MEANS, THE BALANCE DETERMINING THE POSITION OF THE POINT.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |