Patent US3702370A successfully refreshed from Google Patents.
US3702370A
Expired / Lapsed
US
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Digital tone generator system for electronic organ employing a single master oscillator
Assignee: Individual
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Filing: 1971-05-19
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Granted: 1972-11-07
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Expires: 1991-05-19
Abstract
Abstract For use in electronic organs and the like, an electronic circuit for generating a number of signals, the frequencies of which may correspond to the notes of the musical scale, comprises a single master oscillator producing an alternating signal coupled to a harmonic pulse frequency generator producing a number of harmonically related pulse frequency outputs which are selectively connected to summing means, each summing means producing a single output frequency which corresponds to a note of a musical scale. Twelve summing means may be connected selectively to produce the twelve notes of a musical scale.
Inventors
- 👤 John Ray Hallman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:57
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02; G10H5/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A tone generating system for an electronic organ comprising a master oscillator producing a squarewave output connected to a single digital harmonic pulse generating means producing a number of pulse frequencies connected to a plurality of pulse frequency summing means, each pulse frequency summing means connected to selected pulse frequency outputs of said digital harmonic pulse generating means whereby each pulse frequency summing means produces a single high pulse frequency at its output that is equal to the sum of the selectively connected outputs of said digital harmonic pulse generating means.
Claim 2
Dependent Claim
91 words
A tone generating system for an electronic organ comprising a master oscillator producing a squarewave output connected to a single digital harmonic pulse generating means producing a number of pulse frequencies connected to a plurality of pulse frequency summing means, each pulse frequency summing means connected to selected pulse frequency outputs of said digital harmonic pulse generating means whereby each pulse frequency summing means produces a single high pulse frequency at its output that is equal to the sum of the selectively connected outputs of said digital harmonic pulse generating means.
Claim 3
Dependent Claim
40 words
The combination according to claim 1 wherein said master oscillator comprises a plurality of master oscillators set at different frequencies thereby allowing the organ to be tuned by selector switch instantly to different musical keys by selecting corresponding master oscillators.
Claim 4
Dependent Claim
53 words
The combination according to claim 1 wherein said master oscillator comprises a voltage controlled oscillator allowing the musical key to which the organ is tuned to be altered by varying the potential applied to the voltage control input of the master oscillator, thus allowing the organ to produce a multiplicity of special effects.
Claim 5
Dependent Claim
36 words
The combination according to claim 1 wherein said digital harmonic pulse generating means comprises a chain of cascaded digital flip flop circuits, the outputs of which are coupled to monostable one shots producing the pulse frequencies.
Claim 6
Dependent Claim
34 words
The combination according to claim 1 wherein said digital harmonic pulse generating means comprises a chain of cascaded digital flip flops, the outputs of which are coupled to gating means producing the pulse frequencies.
Claim 7
Dependent Claim
74 words
The combination according to claim 1 wherein a number of chains of flip flops of N stages each are connected to each pulse frequency summing means output (and the conventional octave divider chains) and further increasing the master oscillator frequency by a factor of 2N to compensate for the flip flop division ratios thus reducing the undesirable harmonic content of the musical note frequencies appearing at the outputs of said flip flop divider chains.
Claim 8
Dependent Claim
50 words
The combination according to claim 1 wherein said master oscillator comprising a crystal oscillator, said high pulse frequency, each connected to flip flop divider chains producing audio frequencies to which other types of musical instruments may be tuned thus allowing a reference for the tuning purposes of other music instruments.
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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |