US3353030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keying devices, particularly for electrical musical instruments
Assignee: Individual
•
Filing: 1966-08-17
•
Granted: 1967-11-14
•
Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Michel Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/97; G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/053; G10H1/055; G10H1/0555; H03K2017/9706; Y; Y10; Y10S; Y10S84/00; Y10S84/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN AN ELECTRONIC MUSICAL INSTRUMENT HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT FOR CONDUCTING ELECTRONIC MUSICAL INSTRUMENT SIGNALS, THE IMPROVEMENT COMPRISING MEANS FOR ACHIEVING A HIGH KEYING RATIO BETWEEN SAID CIRCUITS COMPRISING: (A) A PLURALITY OF TRANSFORMERS CONNECTED IN TANDEM BETWEEN SAID CIRCUITS; (B) SAID TRANSFORMERS HAVING HIGHLY PERMEABLE CORES ADAPTED TO DEGREES OF SATURATION FOR DETERMINING THE DEGREE OF ISOLATION BETWEEN SAID CIRCUIT; CONDUCTANCE OF SAID OUTPUT CIRCUIT; (C) MAGNETIC POLES ADAPTED TO BE MOVED INTO PROXIMITY WITH SAID CORES TO SATURATE SAID TRANSFORMERS AND TO BE MOVED OUT OF SAID PROXIMITY; AND (D) MEANS FOR MOVING SAID MAGNETIC POLES INTO AND OUT OF SAID PROXIMITY COMPRISING MUSICAL INSTRUMENT KEYS HAVING A RELEASED POSITION FOR MOVING SAID MAGNETIC POLES INTO SAID PROXIMITY AND A DEPRESSED POSITION FOR MOVING SAID MAGNETIC POLES OUT OF SAID PROXIMITY.
Claim 2
Dependent Claim
137 words
IN AN ELECTRONIC MUSICAL INSTRUMENT HAVING AN INPUT CIRCUIT AND AN OUTPUT CIRCUIT FOR CONDUCTING ELECTRONIC MUSICAL INSTRUMENT SIGNALS, THE IMPROVEMENT COMPRISING MEANS FOR ACHIEVING A HIGH KEYING RATIO BETWEEN SAID CIRCUITS COMPRISING: (A) A PLURALITY OF TRANSFORMERS CONNECTED IN TANDEM BETWEEN SAID CIRCUITS; (B) SAID TRANSFORMERS HAVING HIGHLY PERMEABLE CORES ADAPTED TO DEGREES OF SATURATION FOR DETERMINING THE DEGREE OF ISOLATION BETWEEN SAID CIRCUIT; CONDUCTANCE OF SAID OUTPUT CIRCUIT; (C) MAGNETIC POLES ADAPTED TO BE MOVED INTO PROXIMITY WITH SAID CORES TO SATURATE SAID TRANSFORMERS AND TO BE MOVED OUT OF SAID PROXIMITY; AND (D) MEANS FOR MOVING SAID MAGNETIC POLES INTO AND OUT OF SAID PROXIMITY COMPRISING MUSICAL INSTRUMENT KEYS HAVING A RELEASED POSITION FOR MOVING SAID MAGNETIC POLES INTO SAID PROXIMITY AND A DEPRESSED POSITION FOR MOVING SAID MAGNETIC POLES OUT OF SAID PROXIMITY.
References Cited (Backward Citations)
US2781503A
Cited
US2814031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |