US3549778A - Electronic organ with alternate reiteration by three-note groups - Google Patents
Electronic organ with alternate reiteration by three-note groups Download PDFInfo
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- US3549778A US3549778A US805217A US3549778DA US3549778A US 3549778 A US3549778 A US 3549778A US 805217 A US805217 A US 805217A US 3549778D A US3549778D A US 3549778DA US 3549778 A US3549778 A US 3549778A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/18—Selecting circuits
- G10H1/26—Selecting circuits for automatically producing a series of tones
- G10H1/30—Selecting circuits for automatically producing a series of tones to reiteratively sound two tones
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- some commercially available instruments employ two out-of-phase, direct-current actuating voltages for alternate groups of three adjacent keyed-on oscillators or keyed-on gates from continuously running sources. These instruments are productive of desirable musical effects, simulating the alternate playing of two separate notes of a xylophone with a stick in each hand.
- the reiteration of the tones of the commercially available instruments stops immediately upon key release. Therefore, it is a primary object of the preferred embodiment of the present invention to provide an alternating reiteration system in which the decay portion of the tones is reiterated as well as the steady-state portion.
- Continuously available tone signals are either keyed directly or gated into collectors for each group of three adjacentpitched notes.
- Alternate collectors may then be connected to a pair of headers for separate filtering and reiteration altematively in gates which are actuated by the output of a reiteration oscillator and converted to sound; or the pair of headers may each be gated in separate gates in alternating reiterative fashion for subsequent tone color filtering and conversion to sound.
- the output of each of the three-signal collectors may be separately filtered and collected alternately into two headers having each a gate actuated alternately by a reiteration oscillator for subsequent conversion to sound.
- FIG. la is a block diagram of a three-note reiteration system of a type known in the art
- FIG. 1b is a block diagram of another three-note reiteration system of a type known in the art
- FIG. 1c is a graphical representation of the wave form of voltages applicable to the systems of FIGS. 1b and FIG. 2 is a partially-block, partially-schematic diagram of a first embodiment of this present invention
- FIG. 3 is a block diagram of a portion of a further embodiment of this invention.
- FIG. 4 is a block diagram of a preferred embodiment of the present invention.
- FIG. 5 is a schematic diagram of a bistable gate which may be used in the systems of FIGS. 2-4.
- FIG. la is illustrated a prior art system wherein continuously running sources from C down to F within a selected octave are connected respectively to corresponding keying gates 1, usually of a solid-state diode type.
- the gates 1 are connected as shown to a collector 3 and to an output system 5 inclusive of tone-coloring, switching, amplification and loudspeaker means.
- Some of the gates 1 have connections as shown via key switches 7 and 11 and bus 13 to a source (not shown) of voltage +V, connected to a first terminal 17.
- Other gates 1 are connected as shown via other key switches 9 and others (not shown) to a second bus 15, connected to a second source (not shown) of voltage +V connected to a second terminal 19.
- FIG. 1b A similar effect is achieved by another prior art system (see FIG. 1b), wherein the corresponding sources C and A (normally off) are keyed into oscillation by key switches 21 and 23, for example, there being similar voltages +V and +V connected at terminals 27 and 29. Signals from the chosen sources C and A will sound in the output system, inclusive of appropriate tone coloring, switching and amplification.
- a gamut of continuous sources C down to C (from one octave) have respective key switches 63 connected thereto, followed by isolating resistors 65.
- the right-hand terminals of the respective resistors 65 are connected in groups of three, as shown, to collectors 67, 69, 71 and 73.
- Alternate collectors 67 and 71 are connected to a first header 75, while alternate collectors 69 and 73 are joined by a second header 77.
- Headers 75 and 77 are respectively connected to a first filter 79 and a second filter 81, which are respectively connected to gates 83 and 85.
- a reiteration oscillator 84 of a type to be disclosed hereinafter has its two outputs connected respectively to gates 83 and 85, the outputs of which are shown passing through a bus 87, stop switch 89 and an amplifier 91 to an appropriate loudspeaker 93.
- signals corresponding thereto pass via collectors 67 and 69, respectively, and headers 75 and 77, respectively, to filters 79 and 81, respectively.
- signals C and A enter gates 83 and 85, respectively, and are gated in alternation by reiteration oscillator 84.
- the alternately reiterating signals are joined in bus 87 and pass, upon closure of stop switch 89, to amplifier 91, whose amplified output is converted to sound in loudspeaker 93.
- FIG. 3 An alternative embodiment of this invention is illustrated in part in FIG. 3, wherein the system is similar to FIG. 2 up to the headers 75 and 77 whose idicia correspond (as do some of the others hereinafter) to those of FIG. 2.
- headers 75 and 72 connect to the gates 83 and directly, which gates are connected to the reiteration oscillator 84.
- the output leads of the gates 83 and 85 join in a bus 95 which is connected in tandem to a single filter 97, stop switch 89, amplifier 91 and loudspeaker 93.
- FIG. 4 A preferred embodiment of the present invention is illustrated in FIG. 4, wherein exemplary continuous sources C down E (within an octave) have direct connections with a plurality of gates 99, which may be of the solid-state type illustrated, for example, in US. Pat. No. 3,233,031, in the names of Walter Munch, Jr. and Robert C. Scherer, issued Feb. 1, 1966.
- the gates 99 have connections via key switches 101 to source 103 of direct current.
- the output leads from the gates 99 are connected in three-note groups to collectors 105, 107 and 109 which, in turn, are connected to separate filters 111, 113 and 115, respectively.
- Headers 117 and 119 are connected to the filters 111, 113 and 115 as shown, the dashedline extensions of the former indicating that the system may be extended for additional sources, key switches, gates and collectors.
- the headers 117 and 119 may be connected respectively to gates 83 and 85, with connections therefrom to the reiteration oscillator 84.
- the gates 83 and 85 then have connections to a stop switch 89, which is in cascade with amplifier 91 and loudspeaker 93.
- the gates 99 (of FIG. 4) gate the signals from sources C down to E when actuated via switches 101 by direct current from the source 103.
- Collectors 105, 107, 109 channel signals by three-note groups to the filters 1 11, 113, 115 for tone-coloring thereby.
- the collected signals are alternately reiterated in gates 83 and 85 as timed by reiteration oscillator 84.
- Closure of stop switch 89 directs the played signals via amplifier 91 for conversion to sound in loudspeaker 93.
- An advantage of the system of FIG. 4. is that more adequate filtering may be achieved by filtering each three-note group separately. Obviously this requires more filtering components, so a compromise may be achieved by filtering the output from alternate collectors, such as 105 and 109. This would require a wide-pass band filter to handle the wider pitch spread (of nine semitones).
- gates 83 and 85 and reiteration oscillator 84 are illustrated in FIG. 5.
- Two transistors T and T are employed in the multivibrator MV and two FETs, F and F as gates.
- the multivibrator MV employs NPN transistors having emitters which can be selectively connected, via ON-OFF switch 121, to ground or to V.
- the collectors are connected by equal resistors 123, 125 to ground via lead 127.
- the multivibrator MV when switch 121 is in OFF position, the multivibrator MV is inoperative, and when connected in the ON position to V, it oscillates.
- the bases of transistor T and T are connected via resistors 129 and 131 to the slider 133 of a voltage divider 135. Position of the slider established DC bias of T and T and therefore frequency of oscillation, which may be variable in the range of 3 to 13 Hz., for example only.
- the collector of T is capacitively coupled to the base of T and the collector of T to the base of T,, in conventional fashion, to provide oscillations.
- the collectors of T and T then provide control points which proceed in alternation from ground to negative potential as MV oscillates.
- the FETs, F and F are conductive when their gates are referenced to ground. When switch 121 is in OFF condition, both gates are referenced to ground, both FETs are conductive, and continuous signals pass on to an output system through gates F and F which correspond to gates such as 83 and 85 in FIG. 4.
- the collectors of transistors T, and T are shown connected to ground via resistors 123, 137 and 139, and filter capacitors 141 and 143 are provided for smoothing purposes.
- the drain terminal D of FET F is connected to filter 111, in FIG. 4, for example, and drain terminal D of FET F to filter 113.
- the source terminals S are jointly connected to the output, that is, stop switch 89, amplifier 91 and loudspeaker 93, for example.
- a distinct advantage of the embodiment of FIG. 4 is that each tone is reiterated during decay, as well as during the steady-state portion thereof. This is not true of the prior art shown above.
- At least two collectors each coupled to a group of at least two adjacent keying means
- a reiterative gate means one of said gate means reiterating alternately with another of said gate means.
- each of said tone color filters is next to one of said collectors.
- each of said reiterative gate means is next to one of said collectors.
- a further tone color filter coupled to at least one of said collectors not having one of said first tone color filters connected thereto;
- a header having one connection to the junction between one of said first tone color filters and one of said reiterative gate means and another connection with said further tone color filter.
- At least two collectors each coupled to a group of at least two adjacent ones of said keying means
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Description
United States Patent [72] Inventor Walter Munch, Jr.
Park Hills, Covington, Ky. [21] Appl. No. 805,217 [22] Filed Mar. 7, 1969 [45] Patented Dec. 22, 1970 [73] Assignee D. H. Baldwin Company Cincinnati, Ohio a corporation of Ohio [54] ELECTRONIC ORGAN WITH ALTERNATE REITERATION BY THREE-NOTE GROUPS 17 Claims, 7 Drawing Figs.
[52] US. Cl 84/l.03, 84/1.19,84/1.24 [51] Int. Cl. Glh 1/02, GlOh 5/00 [50] Field olSearch 84/1 .01, 1.03, 1.04. 1.19, 1.24, 1.25(A.F,O,S)
[56] References Cited UNITED STATES PATENTS 3,176,060 3/1965 Bissonette et a1 84/1 .01
3,272,906 9/1966 DeVries et al 84/1.25 3,288,907 11/1966 George 84/1.25 3,333,042 7/1967 Brombaugh... 84/l.13 3,476,864 11/1969 Munch et a1 84/1.03
Primary Examiner-W. E. Ray Attorneys-W. l-l. Breunig and Hurvitz, Rose & Greene 65 vv lj '19 C 63 65 6'] 83 gg Mak anew -GnTEa1 31 53;, 65 84 A 63 55 69 I REITERRTlON 87 W g 1 1 use. G 53 5 7| 11 881 r 85 M 1 norm amen F C 63;, STOP 5 63 65 13 89 Suirru-l e3 65 $76) ea 65 91 93 ca 7@ HERDERQI HEHDERUZ SPEQKER PATENTEU 00:22am
I saw 1 OF 3 1161a. $16.": (PRIOR ART) v (PRIOR ART; GATE 2 ,C 1 2 G I 3 y GATE 2| 6 1 s N OUTPUT E8 7 GmE u SYSTEM 2\ j A g? 1 GATE 1 w OUTPUT A Q7- '23 A 9 ho SYSTEM 6 5f GHTE M- N J A,
6 o GATE G 3' (U -0 fl GRTE ,fiY u '25I 2PM I *T** F H9 '25 F M 11 m 9 p M29 w, w
ATTORNEYS ELECTRONIC ORGAN WITI-IALTERNATE REITERATION BY THREE-NOTE GROUPS BACKGROUND OF THE INVENTION It is well known to provide iterative sounding of tones derived from electronic organs. US. Pat. No. 1,901,986 to Ranger is an early example. Later circuits are to be found in the following US. Pat. Nos. 2,342,338 to Hanert, 2,916,957 to Hanert, 3,039,347 to Krauss et al. and 3,235,650 to Cutler et al. Also, some commercially available instruments employ two out-of-phase, direct-current actuating voltages for alternate groups of three adjacent keyed-on oscillators or keyed-on gates from continuously running sources. These instruments are productive of desirable musical effects, simulating the alternate playing of two separate notes of a xylophone with a stick in each hand. However, the reiteration of the tones of the commercially available instruments stops immediately upon key release. Therefore, it is a primary object of the preferred embodiment of the present invention to provide an alternating reiteration system in which the decay portion of the tones is reiterated as well as the steady-state portion.
SUMMARY OF THE INVENTION Continuously available tone signals are either keyed directly or gated into collectors for each group of three adjacentpitched notes. Alternate collectors may then be connected to a pair of headers for separate filtering and reiteration altematively in gates which are actuated by the output of a reiteration oscillator and converted to sound; or the pair of headers may each be gated in separate gates in alternating reiterative fashion for subsequent tone color filtering and conversion to sound. Further, the output of each of the three-signal collectors may be separately filtered and collected alternately into two headers having each a gate actuated alternately by a reiteration oscillator for subsequent conversion to sound.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. la is a block diagram of a three-note reiteration system of a type known in the art;
FIG. 1b is a block diagram of another three-note reiteration system of a type known in the art;
FIG. 1c is a graphical representation of the wave form of voltages applicable to the systems of FIGS. 1b and FIG. 2 is a partially-block, partially-schematic diagram of a first embodiment of this present invention;
FIG. 3 is a block diagram of a portion of a further embodiment of this invention.
FIG. 4 is a block diagram of a preferred embodiment of the present invention; and
FIG. 5 is a schematic diagram of a bistable gate which may be used in the systems of FIGS. 2-4.
DETAILED DESCRIPTION OF THE DRAWINGS In FIG. la is illustrated a prior art system wherein continuously running sources from C down to F within a selected octave are connected respectively to corresponding keying gates 1, usually of a solid-state diode type. The gates 1 are connected as shown to a collector 3 and to an output system 5 inclusive of tone-coloring, switching, amplification and loudspeaker means. Some of the gates 1 have connections as shown via key switches 7 and 11 and bus 13 to a source (not shown) of voltage +V, connected to a first terminal 17. Other gates 1 are connected as shown via other key switches 9 and others (not shown) to a second bus 15, connected to a second source (not shown) of voltage +V connected to a second terminal 19. When the voltages V and V whose wave shapes are illustrated in FIG. 10, are applied to terminals 17 and 19, respectively, notes such as, for example, C and A, are caused to sound, if their corresponding key switches 7 and 9 are closed. Since the positive portions of V and V are out of phase with each other, the notes C and A will sound in altema- LII tion reiteratively. This effect simulates finger keying notes C and A in alternation. Or the result is similar to that of a xylophonist who taps C and A in alternation with separate sticks.
A similar effect is achieved by another prior art system (see FIG. 1b), wherein the corresponding sources C and A (normally off) are keyed into oscillation by key switches 21 and 23, for example, there being similar voltages +V and +V connected at terminals 27 and 29. Signals from the chosen sources C and A will sound in the output system, inclusive of appropriate tone coloring, switching and amplification.
According to the present invention, referring to FIG. 2, a gamut of continuous sources C down to C (from one octave) have respective key switches 63 connected thereto, followed by isolating resistors 65. The right-hand terminals of the respective resistors 65 are connected in groups of three, as shown, to collectors 67, 69, 71 and 73. Alternate collectors 67 and 71 are connected to a first header 75, while alternate collectors 69 and 73 are joined by a second header 77. Headers 75 and 77 are respectively connected to a first filter 79 and a second filter 81, which are respectively connected to gates 83 and 85. A reiteration oscillator 84 of a type to be disclosed hereinafter has its two outputs connected respectively to gates 83 and 85, the outputs of which are shown passing through a bus 87, stop switch 89 and an amplifier 91 to an appropriate loudspeaker 93.
In operation, by selecting key switches 63 (FIG. 2) for sources C and A, signals corresponding thereto pass via collectors 67 and 69, respectively, and headers 75 and 77, respectively, to filters 79 and 81, respectively. After filtering therein, signals C and A enter gates 83 and 85, respectively, and are gated in alternation by reiteration oscillator 84. The alternately reiterating signals are joined in bus 87 and pass, upon closure of stop switch 89, to amplifier 91, whose amplified output is converted to sound in loudspeaker 93.
An alternative embodiment of this invention is illustrated in part in FIG. 3, wherein the system is similar to FIG. 2 up to the headers 75 and 77 whose idicia correspond (as do some of the others hereinafter) to those of FIG. 2. However, headers 75 and 72 connect to the gates 83 and directly, which gates are connected to the reiteration oscillator 84. The output leads of the gates 83 and 85 join in a bus 95 which is connected in tandem to a single filter 97, stop switch 89, amplifier 91 and loudspeaker 93.
It will be obvious to one skilled in the art that in the system of FIG. 3, the alternate reiteration occurs before filtering by virtue of tone signals in headers 75 and 72, respectively, being alternately reiterated in gates 83 and 85, the timing voltages being supplied by reiteration oscillator 84. Filtering may be accomplished in a single filter 97 and sound may be produced in the speaker 93 by closure of stop switch 89, amplification being accomplished in the amplifier 91.
A preferred embodiment of the present invention is illustrated in FIG. 4, wherein exemplary continuous sources C down E (within an octave) have direct connections with a plurality of gates 99, which may be of the solid-state type illustrated, for example, in US. Pat. No. 3,233,031, in the names of Walter Munch, Jr. and Robert C. Scherer, issued Feb. 1, 1966. The gates 99 have connections via key switches 101 to source 103 of direct current. The output leads from the gates 99 are connected in three-note groups to collectors 105, 107 and 109 which, in turn, are connected to separate filters 111, 113 and 115, respectively. Headers 117 and 119 are connected to the filters 111, 113 and 115 as shown, the dashedline extensions of the former indicating that the system may be extended for additional sources, key switches, gates and collectors. The headers 117 and 119 may be connected respectively to gates 83 and 85, with connections therefrom to the reiteration oscillator 84. The gates 83 and 85 then have connections to a stop switch 89, which is in cascade with amplifier 91 and loudspeaker 93.
In operation, the gates 99 (of FIG. 4) gate the signals from sources C down to E when actuated via switches 101 by direct current from the source 103. Collectors 105, 107, 109 channel signals by three-note groups to the filters 1 11, 113, 115 for tone-coloring thereby. The collected signals are alternately reiterated in gates 83 and 85 as timed by reiteration oscillator 84. Closure of stop switch 89 directs the played signals via amplifier 91 for conversion to sound in loudspeaker 93. An advantage of the system of FIG. 4. is that more adequate filtering may be achieved by filtering each three-note group separately. Obviously this requires more filtering components, so a compromise may be achieved by filtering the output from alternate collectors, such as 105 and 109. This would require a wide-pass band filter to handle the wider pitch spread (of nine semitones).
The details of gates 83 and 85 and reiteration oscillator 84 are illustrated in FIG. 5. Two transistors T and T are employed in the multivibrator MV and two FETs, F and F as gates. The multivibrator MV employs NPN transistors having emitters which can be selectively connected, via ON-OFF switch 121, to ground or to V. The collectors are connected by equal resistors 123, 125 to ground via lead 127.
Accordingly, when switch 121 is in OFF position, the multivibrator MV is inoperative, and when connected in the ON position to V, it oscillates.
The bases of transistor T and T, are connected via resistors 129 and 131 to the slider 133 of a voltage divider 135. Position of the slider established DC bias of T and T and therefore frequency of oscillation, which may be variable in the range of 3 to 13 Hz., for example only. The collector of T is capacitively coupled to the base of T and the collector of T to the base of T,, in conventional fashion, to provide oscillations. The collectors of T and T then provide control points which proceed in alternation from ground to negative potential as MV oscillates. The FETs, F and F are conductive when their gates are referenced to ground. When switch 121 is in OFF condition, both gates are referenced to ground, both FETs are conductive, and continuous signals pass on to an output system through gates F and F which correspond to gates such as 83 and 85 in FIG. 4.
The collectors of transistors T, and T are shown connected to ground via resistors 123, 137 and 139, and filter capacitors 141 and 143 are provided for smoothing purposes. The drain terminal D of FET F is connected to filter 111, in FIG. 4, for example, and drain terminal D of FET F to filter 113. The source terminals S are jointly connected to the output, that is, stop switch 89, amplifier 91 and loudspeaker 93, for example.
A distinct advantage of the embodiment of FIG. 4 is that each tone is reiterated during decay, as well as during the steady-state portion thereof. This is not true of the prior art shown above.
Iclaim:
1. In an electronic musical instrument having a plurality of sources of tone signals corresponding to notes of a musical scale and an output system, the combination comprising:
a plurality of keying means respectively corresponding to said sources and respectively coupled thereto;
at least two collectors each coupled to a group of at least two adjacent keying means;
at least two parallel paths respectively between alternate ones of said collecting means and said output system,
each of said paths containing in cascade:
a first tone color filter; and
a reiterative gate means, one of said gate means reiterating alternately with another of said gate means.
2. The combination according to claim 1, wherein each of said tone color filters is next to one of said collectors.
3. The combination according to claim 1, wherein each of said reiterative gate means is next to one of said collectors.
4. The combination according to claim 1, including a reiteration oscillator coupled between two of said reiterative gate means.
5. The combination according to claim 2, including a reiteration oscillator coupled between two of said reiterative gate means.
6. The combination according to claim 3, including a reiteration oscillator coupled between two of said reiterative gate means.
7. The combination according to claim 2, including:
a further tone color filter coupled to at least one of said collectors not having one of said first tone color filters connected thereto; and
a header having one connection to the junction between one of said first tone color filters and one of said reiterative gate means and another connection with said further tone color filter.
8. The combination according to claim 3, wherein said first tone color filter is common to said at least two parallel paths.
9. In an electronic musical instrument having a plurality of sources of tone signals corresponding to notes of a musical scale and an output system, the combination comprising:
a plurality of keying means respectively corresponding to said sources and respectively coupled thereto;
at least two collectors each coupled to a group of at least two adjacent ones of said keying means,
a pair of headers each coupled to alternate ones of said collectors;
a pair of tone color filters respectively coupled to said headers; and
a pair of reiterative gates coupled respectively between said filters and said output system.
10. The combination according to claim 9, including a reiteration oscillator coupled between said gates.
11. The combination according to claim 10, wherein said output system comprises in cascade:
a stop switch;
an amplifier; and
a loudspeaker.
12. In an electronic musical instrument having a plurality of sources of tone signals corresponding to notes of a musical scale and an output system, the combination comprising:
a plurality of keying means respectively corresponding to said sources and respectively coupled thereto;
at least two collectors each coupled to a group of at least two adjacent ones of said keying means;
a pair of headers each coupled to alternate ones of said collectors;
a pair of reiterative gates respectively coupled to said headers; and
atone color filter coupled between said gates and said output system.
13. The combination according-to claim 12, including a reiteration oscillator coupled between said gates.
14. The combination according to claim 13, wherein said output system comprises in cascade:
a stop switch;
an amplifier; and
a loudspeaker.
15. In an electronic musical instrument having a plurality of sources of tone signals corresponding to notes of a musical scale and an output system, the combination comprising:
a plurality of keying means respectively corresponding to said sources and respectively coupled thereto;
a plurality of collectors each coupled to a different group of three adjacent ones of said keying means;
a plurality of filters respectively coupled to said collectors;
a pair of headers each coupled to alternate ones of said filters; and
a pair of reiterative gates coupled respectively between said headers and said output system.
16. The combination according to claim 15, including a reiteration oscillator coupled between said gates.
17. The combination according to claim 16, wherein said output system comprises:
a stop switch;
an amplifier; and
a loudspeaker.
Claims (3)
1. TONE SIGNALS FROM ALTERNATE THREE-NOTE GROUPS ARE COLLECTED IN TWO COMMON HEADERS FOR SEPARATE FILTERING FOLLOWED BY ALTERNATE REITERATION AND CONVERSION TO SOUND.
2. TONE SIGNALS FROM ALTERNATE THREE-NOTE GROUPS ARE COL-
3. TONE SIGNALS FROM ALTERNATE THREE-NOTE GROUPS ARE SEPARATELY FILTERED, THEN COLLECTED IN TWO SEPARATE HEADERS FOR ALTERNATE REITERATION AND CONVERSION TO SOUND.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US80521769A | 1969-03-07 | 1969-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3549778A true US3549778A (en) | 1970-12-22 |
Family
ID=25190973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US805217A Expired - Lifetime US3549778A (en) | 1969-03-07 | 1969-03-07 | Electronic organ with alternate reiteration by three-note groups |
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| Country | Link |
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| US (1) | US3549778A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681508A (en) * | 1969-09-30 | 1972-08-01 | Bohm R | Electronic organ |
| US3740449A (en) * | 1971-06-24 | 1973-06-19 | Conn C Ltd | Electric organ with chord playing and rhythm systems |
| US3910150A (en) * | 1974-01-11 | 1975-10-07 | Nippon Musical Instruments Mfg | Implementation of octave repeat in a computor organ |
| US4137809A (en) * | 1970-12-30 | 1979-02-06 | D. H. Baldwin Company | Arpeggio system for electronic organs |
| US4263829A (en) * | 1979-02-23 | 1981-04-28 | Nippon Gakki Seizo Kabushiki Kaisha | Trill performance circuit in electronic musical instrument |
| EP0338998A2 (en) * | 1988-03-23 | 1989-10-25 | Vito Antonio Catinella | Periodically variable multitone generator |
-
1969
- 1969-03-07 US US805217A patent/US3549778A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3681508A (en) * | 1969-09-30 | 1972-08-01 | Bohm R | Electronic organ |
| US4137809A (en) * | 1970-12-30 | 1979-02-06 | D. H. Baldwin Company | Arpeggio system for electronic organs |
| US3740449A (en) * | 1971-06-24 | 1973-06-19 | Conn C Ltd | Electric organ with chord playing and rhythm systems |
| US3910150A (en) * | 1974-01-11 | 1975-10-07 | Nippon Musical Instruments Mfg | Implementation of octave repeat in a computor organ |
| US4263829A (en) * | 1979-02-23 | 1981-04-28 | Nippon Gakki Seizo Kabushiki Kaisha | Trill performance circuit in electronic musical instrument |
| EP0338998A2 (en) * | 1988-03-23 | 1989-10-25 | Vito Antonio Catinella | Periodically variable multitone generator |
| EP0338998A3 (en) * | 1988-03-23 | 1991-09-04 | Vito Antonio Catinella | Periodically variable multitone generator |
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| Date | Code | Title | Description |
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Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 10089 WILLO Free format text: SECURITY INTEREST;ASSIGNOR:BPO ACQUISITION CORP. A CORP OF DE;REEL/FRAME:004298/0001 Effective date: 19840615 Owner name: GENERAL ELECTRIC CREDIT CORPORATION, A NY CORP., C Free format text: SECURITY INTEREST;ASSIGNOR:BPO ACQUISITION CORP., A DE CORP;REEL/FRAME:004297/0802 Effective date: 19840615 |
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Owner name: BPO ACQUISITION CORP., 180 GILBERT AVE., CINCINNAT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:D.H. BALDWIN COMPANY AN OH CORP.;REEL/FRAME:004385/0934 Effective date: 19840615 |
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Owner name: BALDWIN PIANO & ORGAN COMPANY Free format text: CHANGE OF NAME;ASSIGNOR:BPO ACQUISTION CORP.;REEL/FRAME:004473/0501 Effective date: 19840612 |