US3745225A - Musical instrument having automatic fill-in means - Google Patents

Musical instrument having automatic fill-in means Download PDF

Info

Publication number
US3745225A
US3745225A US00248015A US3745225DA US3745225A US 3745225 A US3745225 A US 3745225A US 00248015 A US00248015 A US 00248015A US 3745225D A US3745225D A US 3745225DA US 3745225 A US3745225 A US 3745225A
Authority
US
United States
Prior art keywords
series
switches
musical instrument
key
instrument according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00248015A
Other languages
English (en)
Inventor
G Hall
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3745225A publication Critical patent/US3745225A/en
Assigned to FOOTHILL CAPITAL CORPORATION, A CORP. OF CA reassignment FOOTHILL CAPITAL CORPORATION, A CORP. OF CA SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOWREY INDUSTRIES,INC.
Assigned to Lowrey Industries, Inc. reassignment Lowrey Industries, Inc. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NORLIN INDUSTRIES, INC.
Assigned to HALL, ROBERT J., HALL, GEORGE R., COOKERLY, JACK reassignment HALL, ROBERT J. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: Lowrey Industries, Inc.
Assigned to LOWRY INDUSTRIES, INC. reassignment LOWRY INDUSTRIES, INC. RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: FOOTHILL CAPITAL CORPORATION
Anticipated expiration legal-status Critical
Assigned to YAMAHA CORPORATION reassignment YAMAHA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: COOKERLY, JACK, HALL, GEORGE R., HALL, ROBERT J.
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • G10H1/36—Accompaniment arrangements
    • G10H1/38—Chord
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/155—Musical effects
    • G10H2210/161—Note sequence effects, i.e. sensing, altering, controlling, processing or synthesising a note trigger selection or sequence, e.g. by altering trigger timing, triggered note values, adding improvisation or ornaments or also rapid repetition of the same note onset
    • G10H2210/175—Fillnote, i.e. adding isolated notes or passing notes to the melody

Definitions

  • a musical instrument such as an organ, includes conventional circuitry, and in addition a series of keyoperated switches associated with one manual and respectively connected to a series of electronic switches that are normally nonconductive, each key-operated switch and each electronic switch being connected in series between a source of dc-keying potential and a corresponding tone signal source, and a second series of key-operated switches under the control of another manual, each such switch being resistively connected to control the electronic switch of a noncorresponding key along with musically adjacent noncorresponding keys.
  • a dc-keying potential is brought through a key switch typically under the control of the keys of the lower manual of an organ and is conducted thence to an electronic switch which is normally biased off but which is connected to deliver such keying potential to a tone signal source that normally includes a gate which is keyed for conventional playing.
  • the electronic switch has a control terminal that is connected through a resistance network to be controlled by supplemental key switches operated by the other manual.
  • the electronic switch that is primarily rendered conductive is connected to control the tone signal source that is approximately one-half octave below the playing key that controls such electronic switch, and the potential at the control terminal is passed by the resistance network to adjacent electronic switches that are associated with signal sources that are arranged both upwardly and downwardly therefrom, preferably all spaced a few notes below the solo note being played.
  • Another object of the present invention is to provide an automatic fill-in means for a musical instrument which utilizes simplified circuitry.
  • a still further object of the present invention is to provide an automatic fill-in means for a musical instrument which is as low-cost as possible and which requires a minimum of potential servicing.
  • FIGS. 1 and 2 jointly comprise a schematic diagram of a musical instrument having an automatic fill-in circuitry provided in accordance with the present invention.
  • FIGS. 1 and 2 jointly comprise a single schematic diagram when placed end to end with the horizontal lines in registration with each other.
  • the instrument 10 includes conventional output means 11, here comprising an amplifier 12 and a speaker 13.
  • output means 11 comprising an amplifier 12 and a speaker 13.
  • a series of 41 tone signal sources two of which are illustrated at 15 and 16.
  • Each tone signal source comprises a point in circuitry at which a desired frequency having a desired harmonic content is obtained, and the tone signals derived therefrom are normally continuously present at one portion 17 which is coupled to the amplifier 12 whenever a gate 18 forming a part thereof is rendered active or conductive by a dckeying potential.
  • certain components are supplementally identified by a note or pitch with a subscript, the subscripts being terms of reference and not necessarily the subscripts used in tables of standards.
  • F is indicative of any of several octavely related Fs of any of several possible voices.
  • the tone signal sources 15,16 provide the voices associated with the upper or right-hand manual in this embodiment, and there are other tone signal sources (not shown) which are associated with the keys of the lower manual or left-hand manual. They likewise are connected to the bus 19.
  • a source of dc-keying potential 20 is provided, the same being shown here as +22 volts.
  • the source of potential 20 is connected via an on-off switch 21 and through a protective diode 22 to a first series of key operated switches 23.
  • the switches 23 are supplemental to any other key switches controlled by the keys of the lower manual and are actuated with them by such keys.
  • the switches 23 are thus actuated and controlled by 28 consecutive keys that make up a chromatic scale that extends for more than 1 octave, and the movable contacts on the 12 key switches 23 that make up 1 octave are connected in parallel with corresponding key switches of the other octaves.
  • FIG. 1 there is shown a second series of key-operated switches 25, there being 37 such switches in this embodiment.
  • These key switches 25 are under the control of the keys of the upper or right-hand manual and are supplemental to any other key switches that the upper manual controls.
  • switches 25 have a movable contact and they have a stationary contact or keying bus 6 common thereto which is grounded and thus has a potential lower than the source of dc-keying potential 20.
  • the switches 25 are each connected by a separate line 26 to the switching circuitry.
  • a series of 41 electronic switches 27 is provided ctavely related inputs of such electronic switches 27 being connected together, and the 12 sets of switches are respectively connected to the lines 24.
  • Each electronic switch 27 has a control terminal, an input terminal and an output terminal.
  • the electronic switch 27 is a transistor of the pnp type, the emitter being the input that is connected to octavely related inputs and to the corresponding key switch 23, the output being a collector which is connected by a line 28 to the corresponding tone signal source 15, and the control terminal being the base which is connected by a resistor 29, which typically has a resistance value of 47K, to a tap 30 which in turn is connected to one of the switches 25 that is associated with a noncorresponding key.
  • the tone signal F is controlled by a C key switch 25 which is above it. This same offset relationship exists uniformly.
  • a series of 41 biasing resistors 31 is respectively connected between the source of dc-potential and the base or control terminal of each electronic switch 27, and these resistors 31 provide a potential for biasing each electronic switch to nonconductivity.
  • a typical size for the resistors 31 is 22K.
  • Each of a series of 40 coupling resistors 41 typically has a value of 4.7K and connects together adjacent taps 30 that are associated with chromatically related keys and tone signal sources.
  • the resistors 41 comprise a group of coupling resistors that are connected in series to provide a resistive coupling bus that has the taps 311 connected to one end of each of the resistors 29.
  • a further resistor 42 which has a typical size of 18K, is connected between the source of dc-keying potential and one of the taps 30. With this arrangement, one control terminal is connected to the adjacent control terminal by means of their respective resistors 22 and the coupling resistor 41.
  • the network thus described provides resistive connections between ground and the electronic switches 27, and in addition, through the resistive coupling bus made up of theresistors 41 and the taps 30, to adjacent electronic switches of noncorresponding key or note. Further, the resistors 41 connect together musically adjacent key switches 25 as shown.
  • a third series of key-operated switches 43 is connected between the source of dc-potential and the tone signal sources 15,16 and comprise the conventional switches under the control of the keys of the upper key manual for normal playing. Thus in this embodiment, there are 41 such switches.
  • the switches 43 and the switches 25 are thus actuated simultaneously by each of the 37 keys that have both types of switches.
  • the instrument in normal operation of the instrument, the instrument can be utilized with the fill-in feature left of by leaving the switch 21 in an open position.
  • the keys close the conventional key switches 43 so as to key whatever tone signal sources that have been selected by means of the conventional stop tabs.
  • the switch 21 When the presentinvention is utilized, the switch 21 is closed and a chord typically comprising three or four harmonically related notes is produced by playing the same on the lower manual thus closing a corresponding number of key switches 23, thereby bringing dc-keying potential to the input or emitter of all of the transistors 27 that are associated with corresponding notes or tones, not only in the octave played, but also in all octaves provided. At that moment, since the same potential is present on the base as is present on the emitter, the transistor or electronic switch 27 remains nonconductive.
  • the left-hand switches 23 provide keying potential at all the selected electronic switches 27 and this by itself has no effect.
  • the grounding of the base through the resistor 29 renders the transistor 27 conductive and current flows through the emitter to the tone signal source 15,16.
  • the control terminals or bases of the next four higher and the next four lower electronic switches have their potential sufficiently lowered to render them also conductive sufi'icient to control the tone signal sources 15,16, but because of the cumulative effect of the resistances, the fifth transistor above and the fifth transistor below the one with the lowest potential will not have sufficient reduction in potential to overcome the bias thereon.
  • a musical instrument comprising:
  • a. output means for converting electrical tone signals into sound
  • a series of tone signal sources each connected to said output means and operative to provide it with a tone signal in response to a dc-keying potential applied thereto;
  • a second series of solo-key-operated switches each resistively connected to a plurality of said electronic switches to control one of said electronic switches of noncorresponding key and musically adjacent ones of said electronic switches.
  • a musical instrument according to claim 1 including a third series of accompaniment key-operated switches respectively actuatable with the switches of said first and second series and respectively connected between said source of dc-keying potential and said tone signal sources.
  • a musical instrument in which said first series of key-operated switches extends for more than an octave, the switches of the keys in one octave of said first series being respectively connected in parallel to the switches of the other corresponding keys in said first series for controlling keying potential.
  • a musical instrument in which said series of tone signal sources extends for more than an octave, the inputs of said electronic switches for one octave of said tone signal sources being respectively connected to the inputs of the other corresponding electronic switches.
  • a musical instrument according to claim 1 which includes a series of unidirectional diodes connected respectively to said electronic switches to block any reverse current flow.
  • each of said electronic switches is a transistor.
  • a musical instrument in which said transistor is of the pnp type with its emitter connected to the key-operated switch, its collector connected to the tone signal source, and its base connected to the noncorresponding key of said second series.
  • each of said electronic switches has a control terminal which has the resistance connection with the switch in said second series, and means connected to said control terminal and biasing each said electronic switch to be normally nonconducting.
  • a musical instrument according to claim 1 in which the musically adjacent ones of said second series of solo key-operated switches are connected together by a resistor.
  • each of said electronic switches has a control terminal, each such control terminal being connected by a resistance to the control terminal of the musically adjacent electronic switch.
  • each of said electronic switches has a control terminal connected through a first resistor to the noncorresponding key switch, and a group of coupling resistors connected in series to form a resistive'coupling bus having taps connected to one end of each of said first resistors.
  • a musical instrument according to claim 11 including a further resistor connecting said resistive coupling bus to said source of dc-keying potential.
  • a musical instrument according to claim 11 including a series of resistors respectively connecting each of said control terminals to said source of dckeying potential.
  • a musical instrument according to claim 1 in which said second series of solo key-operated switches are connected to a source of potential that is less positive than said source of dc-keying potential.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
US00248015A 1972-04-27 1972-04-27 Musical instrument having automatic fill-in means Expired - Lifetime US3745225A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24801572A 1972-04-27 1972-04-27

Publications (1)

Publication Number Publication Date
US3745225A true US3745225A (en) 1973-07-10

Family

ID=22937298

Family Applications (1)

Application Number Title Priority Date Filing Date
US00248015A Expired - Lifetime US3745225A (en) 1972-04-27 1972-04-27 Musical instrument having automatic fill-in means

Country Status (5)

Country Link
US (1) US3745225A (enrdf_load_stackoverflow)
JP (1) JPS5210374B2 (enrdf_load_stackoverflow)
CA (1) CA945792A (enrdf_load_stackoverflow)
GB (1) GB1362640A (enrdf_load_stackoverflow)
IT (1) IT972929B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825668A (en) * 1972-05-30 1974-07-23 Nippon Musical Instruments Mfg Electronic musical instrument capable of providing a third type of musical tones by operation of two keyboards in addition to the ordinary melody and chord tones
US3871262A (en) * 1973-12-14 1975-03-18 Kimball Int Electronic organ having delayed fill in
US3908502A (en) * 1974-06-12 1975-09-30 Wurlitzer Co Electronic organ with chord control
US3918342A (en) * 1973-09-14 1975-11-11 Keio Giken Kogyo Kabushikikais Monophonic electronic musical instrument of equal tempered scale
US3948137A (en) * 1974-03-15 1976-04-06 Nippon Gakki Seizo Kabushiki Kaisha Pitch determining voltage signal generating circuit for a voltage controlled type electronic musical instrument
US4208939A (en) * 1979-04-02 1980-06-24 Norlin Industries, Inc. Data encoder for an electronic musical instrument
US4296665A (en) * 1980-05-12 1981-10-27 Kimball International, Inc. Fill note generator for electronic organ
US4311077A (en) * 1980-06-04 1982-01-19 Norlin Industries, Inc. Electronic musical instrument chord correction techniques
US4311076A (en) * 1980-01-07 1982-01-19 Whirlpool Corporation Electronic musical instrument with harmony generation
US4328732A (en) * 1979-10-09 1982-05-11 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument capable of fill-note generation
US4329550A (en) * 1980-05-12 1982-05-11 Mccann's Engineering & Manufacturing Company Delayed action liquid level sensing apparatus
US4508002A (en) * 1979-01-15 1985-04-02 Norlin Industries Method and apparatus for improved automatic harmonization

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62119639U (enrdf_load_stackoverflow) * 1986-01-22 1987-07-29

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023659A (en) * 1960-07-11 1962-03-06 Wurlitzer Co Transposition apparatus for electrical musical instrument
US3247310A (en) * 1962-09-13 1966-04-19 Chicago Musical Instr Co Musical instrument
US3283056A (en) * 1962-02-08 1966-11-01 Chicago Musical Instr Co Controlled harmonization for musical instruments
US3359358A (en) * 1963-05-22 1967-12-19 Warwick Electronics Inc Chord organ switching circuit for selectively playing either chords or single notes by depressing one key
US3407260A (en) * 1965-05-12 1968-10-22 Hammond Corp Electric organ polyphonic percussion system having multiple use keyers
US3470306A (en) * 1965-07-01 1969-09-30 Baldwin Co D H Bass register keying system
US3476866A (en) * 1965-08-11 1969-11-04 Baldwin Co D H Low-pitched voices in electronic organs
US3499092A (en) * 1968-08-12 1970-03-03 Baldwin Co D H Accompaniment chord rhythm system
US3509263A (en) * 1966-07-07 1970-04-28 Warwick Electronics Inc Electronic musical instrument keying system including attack and decay control
US3657463A (en) * 1969-11-18 1972-04-18 Nippon Musical Instruments Mfg Keyer control circuit for electronic musical instruments
US3665088A (en) * 1970-11-27 1972-05-23 Warwick Electronics Inc Keyer circuit for an electronic musical instrument wherein a single switch may actuate a single note or a chord

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023659A (en) * 1960-07-11 1962-03-06 Wurlitzer Co Transposition apparatus for electrical musical instrument
US3283056A (en) * 1962-02-08 1966-11-01 Chicago Musical Instr Co Controlled harmonization for musical instruments
US3247310A (en) * 1962-09-13 1966-04-19 Chicago Musical Instr Co Musical instrument
US3359358A (en) * 1963-05-22 1967-12-19 Warwick Electronics Inc Chord organ switching circuit for selectively playing either chords or single notes by depressing one key
US3407260A (en) * 1965-05-12 1968-10-22 Hammond Corp Electric organ polyphonic percussion system having multiple use keyers
US3470306A (en) * 1965-07-01 1969-09-30 Baldwin Co D H Bass register keying system
US3476866A (en) * 1965-08-11 1969-11-04 Baldwin Co D H Low-pitched voices in electronic organs
US3509263A (en) * 1966-07-07 1970-04-28 Warwick Electronics Inc Electronic musical instrument keying system including attack and decay control
US3499092A (en) * 1968-08-12 1970-03-03 Baldwin Co D H Accompaniment chord rhythm system
US3657463A (en) * 1969-11-18 1972-04-18 Nippon Musical Instruments Mfg Keyer control circuit for electronic musical instruments
US3665088A (en) * 1970-11-27 1972-05-23 Warwick Electronics Inc Keyer circuit for an electronic musical instrument wherein a single switch may actuate a single note or a chord

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825668A (en) * 1972-05-30 1974-07-23 Nippon Musical Instruments Mfg Electronic musical instrument capable of providing a third type of musical tones by operation of two keyboards in addition to the ordinary melody and chord tones
US3918342A (en) * 1973-09-14 1975-11-11 Keio Giken Kogyo Kabushikikais Monophonic electronic musical instrument of equal tempered scale
US3871262A (en) * 1973-12-14 1975-03-18 Kimball Int Electronic organ having delayed fill in
US3948137A (en) * 1974-03-15 1976-04-06 Nippon Gakki Seizo Kabushiki Kaisha Pitch determining voltage signal generating circuit for a voltage controlled type electronic musical instrument
US3908502A (en) * 1974-06-12 1975-09-30 Wurlitzer Co Electronic organ with chord control
US4508002A (en) * 1979-01-15 1985-04-02 Norlin Industries Method and apparatus for improved automatic harmonization
US4208939A (en) * 1979-04-02 1980-06-24 Norlin Industries, Inc. Data encoder for an electronic musical instrument
US4328732A (en) * 1979-10-09 1982-05-11 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument capable of fill-note generation
US4311076A (en) * 1980-01-07 1982-01-19 Whirlpool Corporation Electronic musical instrument with harmony generation
US4296665A (en) * 1980-05-12 1981-10-27 Kimball International, Inc. Fill note generator for electronic organ
US4329550A (en) * 1980-05-12 1982-05-11 Mccann's Engineering & Manufacturing Company Delayed action liquid level sensing apparatus
US4311077A (en) * 1980-06-04 1982-01-19 Norlin Industries, Inc. Electronic musical instrument chord correction techniques

Also Published As

Publication number Publication date
IT972929B (it) 1974-05-31
GB1362640A (en) 1974-08-07
JPS4922923A (enrdf_load_stackoverflow) 1974-02-28
CA945792A (en) 1974-04-23
JPS5210374B2 (enrdf_load_stackoverflow) 1977-03-23

Similar Documents

Publication Publication Date Title
US3745225A (en) Musical instrument having automatic fill-in means
US3674907A (en) Keyboard transposition of electrical musical instruments
GB1295994A (enrdf_load_stackoverflow)
US3037413A (en) Electronic organ with transient speech effects
US3571481A (en) Marimba tone forming system for an electronic musical instrument
US3247310A (en) Musical instrument
US3359358A (en) Chord organ switching circuit for selectively playing either chords or single notes by depressing one key
US3786166A (en) Keyboard type electronic musical instrument
US3651729A (en) Circuit for rapid note passage in electronic musical instrument
US3795755A (en) Automatic accompaniment device of an electronic musical instrument
US2274199A (en) Electrical musical instrument
US3040612A (en) Electrical musical instrument
US3626074A (en) Touch-responsive tone envelope control circuit for electronic musical instruments
US3407260A (en) Electric organ polyphonic percussion system having multiple use keyers
US3470306A (en) Bass register keying system
US3706837A (en) Automatic rhythmic chording unit
US3665088A (en) Keyer circuit for an electronic musical instrument wherein a single switch may actuate a single note or a chord
US2227100A (en) Musical instrument
US3671659A (en) Plural tone selector for an electronic musical instrument
US3780203A (en) Organ system for automatically producing runs of various character
US3560628A (en) Multi-channel key switch circuit
US2951412A (en) Electrical musical instrument with percussion apparatus
US3908502A (en) Electronic organ with chord control
US4000674A (en) One key chording system for an electronic keyboard instrument
US3558794A (en) Bass register keying system

Legal Events

Date Code Title Description
AS Assignment

Owner name: FOOTHILL CAPITAL CORPORATION, A CORP. OF CA, CALIF

Free format text: SECURITY INTEREST;ASSIGNOR:LOWREY INDUSTRIES,INC.;REEL/FRAME:004390/0081

Effective date: 19840928

AS Assignment

Owner name: LOWREY INDUSTRIES, INC. 707 LAKE-COOK ROAD DEERFIE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:NORLIN INDUSTRIES, INC.;REEL/FRAME:004450/0317

Effective date: 19850402

AS Assignment

Owner name: COOKERLY, JACK,CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

Owner name: HALL, ROBERT J.,CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

Owner name: HALL, GEORGE R.,CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

Owner name: HALL, GEORGE R., 13613 HUSTON STREET, SHERMAN OAKS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

Owner name: COOKERLY, JACK, 26916 BARBACOA PLACE, SAUGUS, CA 9

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

Owner name: HALL, ROBERT J., 10756 TRIBUNE STREET, CHATSWORTH,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LOWREY INDUSTRIES, INC.;REEL/FRAME:004865/0899

Effective date: 19870324

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

AS Assignment

Owner name: LOWRY INDUSTRIES, INC., ILLINOIS

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FOOTHILL CAPITAL CORPORATION;REEL/FRAME:005156/0231

Effective date: 19890616

AS Assignment

Owner name: YAMAHA CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:HALL, GEORGE R.;HALL, ROBERT J.;COOKERLY, JACK;REEL/FRAME:005426/0082

Effective date: 19900817