Patent US3706837A successfully refreshed from Google Patents.
US3706837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic rhythmic chording unit
Assignee: TWCA CORP
•
Filing: 1971-06-17
•
Granted: 1972-12-19
•
Expires: 1991-06-17
Abstract
Abstract A keyboard musical instrument is provided having a keyboard for playing solo or lead. Automatic switching also is provided for producing predetermined percussive-type rhythm patterns and sounds, and is operable with a plurality of chord buttons to play predetermined chords and also a related bass note. The chords and bass note may be alternated, the bass note being the root of the chord or its fifth preferably alternating.
Inventors
- 👤 Alvan D Arsem
- 👤 Harold O Schwartz
- 👤 Anthony C Ippolito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:19
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
236 words
Automatic rhythmic chord playing apparatus in an electronic organ, said organ having a plurality of keys and pedals and a plurality of means for generating tone oscillations corresponding to said keys and to said pedals and interconnected therewith, the means for producing tone oscillations corresponding to pedals comprising divider means connected to the generators for the tone oscillations corresponding to the keys comprising electronic gate means connected to the output of said divider means, means for rendering said electronic gate means conductive suddenly and for subsequently rendering said electronic gate means gradually nonconductive, pulse producing means, means connecting said pulse producing means to said means for rendering said gate means conductive and non-conductive to pass oscillations corresponding to pedal tones in accordance with a predetermined pattern, means connected to predetermined groups of said gate means and to said pulse producing means to pass oscillations corresponding to chords musically related to said pedal tones in accordance with the pattern of said pulses, said last named means comprising a plurality of normally non-conducting gates respectively receiving pulses from said pulse producing means and having a common output line, means for respectively rendering said non-conducting gates conductive to transmit pulses to said common output line, and pulse shaping means connecting said common output line to said predetermined groups of gate means and output means connected to said gates and to said gate means and receiving the tone oscillations therefrom.
Claim 2
Dependent Claim
236 words
Automatic rhythmic chord playing apparatus in an electronic organ, said organ having a plurality of keys and pedals and a plurality of means for generating tone oscillations corresponding to said keys and to said pedals and interconnected therewith, the means for producing tone oscillations corresponding to pedals comprising divider means connected to the generators for the tone oscillations corresponding to the keys comprising electronic gate means connected to the output of said divider means, means for rendering said electronic gate means conductive suddenly and for subsequently rendering said electronic gate means gradually nonconductive, pulse producing means, means connecting said pulse producing means to said means for rendering said gate means conductive and non-conductive to pass oscillations corresponding to pedal tones in accordance with a predetermined pattern, means connected to predetermined groups of said gate means and to said pulse producing means to pass oscillations corresponding to chords musically related to said pedal tones in accordance with the pattern of said pulses, said last named means comprising a plurality of normally non-conducting gates respectively receiving pulses from said pulse producing means and having a common output line, means for respectively rendering said non-conducting gates conductive to transmit pulses to said common output line, and pulse shaping means connecting said common output line to said predetermined groups of gate means and output means connected to said gates and to said gate means and receiving the tone oscillations therefrom.
Claim 3
Dependent Claim
166 words
Automatic rhythmic chord playing apparatus in an electronic organ, said organ having a plurality of keys and pedals and a plurality of means for generating tone oscillations corresponding to said keys and to said pedals and interconnected therewith, comprising a plurality of electronic gates, means connecting said gates to said tone generators, means for producing pulses corresponding to musical beats, means connecting said pulse producing means to certain of said gates to pass oscillations corresponding to pedal tones in accordance with a predetermined patTern including at least on the first musical beat of a measure, means connecting said pulse producing means to groups of said gates to pass oscillations corresponding to chords musically related to said pedal tones on certain of said beats other than the first beat of a measure, means connected to the organ pedals and to said chord gates for rendering said chord gates conductive upon depression of any pedal, and output means connected to said gates and receiving the tone oscillations therefrom.
Claim 4
Dependent Claim
166 words
Automatic rhythmic chord playing apparatus in an electronic organ, said organ having a plurality of keys and pedals and a plurality of means for generating tone oscillations corresponding to said keys and to said pedals and interconnected therewith, comprising a plurality of electronic gates, means connecting said gates to said tone generators, means for producing pulses corresponding to musical beats, means connecting said pulse producing means to certain of said gates to pass oscillations corresponding to pedal tones in accordance with a predetermined patTern including at least on the first musical beat of a measure, means connecting said pulse producing means to groups of said gates to pass oscillations corresponding to chords musically related to said pedal tones on certain of said beats other than the first beat of a measure, means connected to the organ pedals and to said chord gates for rendering said chord gates conductive upon depression of any pedal, and output means connected to said gates and receiving the tone oscillations therefrom.
Claim 5
Dependent Claim
54 words
Apparatus as set forth in claim 1 including means for playing chords and pedal tones manually instead of automatically and including means for limiting the conductivity of the gate means to a lower level for manual than automatic operation to produce pedal tones at a lower intensity on manual operation than on automatic operation.
Claim 6
Dependent Claim
19 words
Apparatus as set forth in claim 1 wherein the means for respectively rendering the non-conducting gates conductive comprises DC.
References Cited (Backward Citations)
US3422210A
Cited
US3207952A
Cited
US3255292A
Cited
US3358068A
Cited
US3435123A
Cited
US3476866A
Cited
US3546355A
Cited
US3548066A
Cited
US3590129A
Cited
US3585891A
Cited
US3567838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |