Patent US3263018A successfully refreshed from Google Patents.
US3263018A
Expired / Lapsed
US
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Diode disconnect circuit, for electronic musical instruments, isolating variable load means from tone generator means
Assignee: Thomas International Corp
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Filing: 1963-06-21
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Granted: 1966-07-26
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Expires: 1983-06-21
Abstract
No abstract record available.
Inventors
- 👤 John R Brand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:01
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/10; G10H5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A TONE GENERATOR SYSTEM FOR ELECTRONIC MUSICAL INSTRUMENTS HAVING VARIABLE LOAD CIRCUIT MEANS, COMPRISING: REGENERATIVE TONE GENERATOR MEANS HAVING OUTPUT MEANS WHICH ALTERNATELY DEVELOPS A LOW INTERNAL IMPEDANCE AND A HIGH INTERNAL IMPEDANCE; AND OUTPUT ISOLATOR STATIC PASSIVE UNIDIRECTIONAL MEANS CONNECTED BETWEEN SAID OUTPUT MEANS AND SAID LOAD CIRCUIT MEANS, SAID OUTPUT ISOLATOR MEANS BEING OPERATIVE TO CONNECT SAID GENERATOR MEANS TO THE LOAD CIRCUIT MEANS DURING PERIODS OF LOW INTERNAL GENERATOR IMPEDANCE AND DISCONNECT IT FROM SAID LOAD CIRCUIT MEANS DURING PERIODS OF HIGHER INTERNAL IMPEDANCE WHEREBY THE FREQUENCY OF THE TONE GENERATOR MEANS IS UNAFFECTED BY VARIATIONS IN SAID LOAD CIRCUIT MEANS.
Claim 2
Dependent Claim
104 words
A TONE GENERATOR SYSTEM FOR ELECTRONIC MUSICAL INSTRUMENTS HAVING VARIABLE LOAD CIRCUIT MEANS, COMPRISING: REGENERATIVE TONE GENERATOR MEANS HAVING OUTPUT MEANS WHICH ALTERNATELY DEVELOPS A LOW INTERNAL IMPEDANCE AND A HIGH INTERNAL IMPEDANCE; AND OUTPUT ISOLATOR STATIC PASSIVE UNIDIRECTIONAL MEANS CONNECTED BETWEEN SAID OUTPUT MEANS AND SAID LOAD CIRCUIT MEANS, SAID OUTPUT ISOLATOR MEANS BEING OPERATIVE TO CONNECT SAID GENERATOR MEANS TO THE LOAD CIRCUIT MEANS DURING PERIODS OF LOW INTERNAL GENERATOR IMPEDANCE AND DISCONNECT IT FROM SAID LOAD CIRCUIT MEANS DURING PERIODS OF HIGHER INTERNAL IMPEDANCE WHEREBY THE FREQUENCY OF THE TONE GENERATOR MEANS IS UNAFFECTED BY VARIATIONS IN SAID LOAD CIRCUIT MEANS.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |