Een overzicht van de vele uitvindingen van Hammond met de bijbehorende patenten
 

Patents Issued to Laurens Hammond and Date of U. S. Patent

Date Patent No. Description

1907 (France) Automatic gearshift for automobiles
1912 1,015,886 Differential mercury barometer
1920 1,345,767 Heat seal
1922 15,299 (Reissue) Tickless clock
1922 1,435,520 Teleview - stereoscopic motion pictures
1924 1,481,006 Shadowgraph
1924 1,506,524 Stereoscopic motion picture device
1928 1,686,854 Stereoscopic picture-viewing apparatus
1929 1,719,805 Alternating current clock
1930 1,744,268 Electrolytic condenser structure
1930 1,858,947 Battery eliminator
1931 1,796,649 Alternating current clock
1931 1,797,912 Alternating current clock
1932 1,867,315 Synchronous electric motor
1932 1,873,397 Method of making stator and rotor plates
1932 1,889,729 Card table with automatic dealing mechanism
1933 1,915,090 Synchronous electric phonograph motor
1933 1,924,606 Electrolytic condenser
1933 1,924,853 Alternating current clock
1934 1,956,350 Electric organ - first patent (used a crank to start it then!)
1934 1,960,672 Frequency-indicating and control apparatus, allowing power plants to keep
                          on time and keep clocks right!
1934 1,964,914 Card-feeding device (filed 1932)
1935 1,998,672 Card, table
1935 2,003,116 Electric clock motor
1935 2,013,208 Electric clock
1936 2,027,531 Electric alarm clock
1936 2,042,337 Electric calendar clock (filed 1931)
1937 2,067,708 Electric clock, self-starting
1937 2,080,371 Self-starting mechanism for electric clock
1937 2,099,204 Multiple key switches for organ
1938 2,117,002 Keyboard for musical instruments
1938 2,126,464 Electric piano
1938 2,126,682 Novachord
1939 2,159,505 Electric organ - improvements
1939 2,161,706 Electric organ - gradual attack
1939 2,184,424 Electric piano - key action

1940	Design 96,105	Tone cabinets
1940	2,203,569	Solovox
1940	2,211,205	Reverberation apparatus (locking system)
1940	2,214,764	Pick-up tone wheel (coil and magnet)
1940	2,216,513	Slow decay system for electric organ
1940	2,221,188	Improved swell or intensity control
1940	2,224,729	Attack and decay control (vacuum tubes)
1941	2,230,836	Artificial reverberation
1941	2,233,256	Solovox improvements
1941	2,241,363	Pedal changing manual note
1941	2,245,337	Vacuum-tube system to give effect more like pipe organ
1941	2,245,338	Sustaining pedal for Novachord
1941	2,251,051	Organ with more than one set of generators
1941	2,251, 052	Volume control for Solovox
1941	2,253,782	Keyboard for Solovox
1941	2,254,366	Variable impedance swell expression control
1941	2,262,179	Improvements on Novachord
1941	2,262,494	Simplified touch response key action for Novachord
1941	2,266,030	Sustaining pedal for Novachord, to make it more like a piano
1942	2,274,199	Quartet organ
1942	2,276,389	Novachord improvements – frequency dividers
1942	2,281,284	Means of determining altitude
1942	2,281,493	Bichronous electric clock (filed 1931!)
1942	2,281,494	Bichronous electric clock (filed 1931!)
1942	2,281,495	Electrostatic organ
1942	2,301,869	Frequency generating system
1943	2,314,496	Tone wheels generating tone rich in harmonics with Vibrato effect
1943	2,323,392	Improved vibrato
1943	2,332,076	Organ devices for multi-part harmony
1944	2,364,972	Bank-and-turn indicator (aircraft)
1945	2,383,381	Camera shutter for aerial camera
1946	2,408,929	Steering apparatus for unmanned aircraft
1946	2,408,930	Frequency meter control mechanism
1947	2,413,870	Radiant energy detecting and control (Heat-seeker)
1947	2,423,885	Radiant energy detecting apparatus (Heat-seeker)
1947	2,432,151	Amplifying system
1948	2,439,294	Steering control apparatus for light-seeker
1948	2,439,295	Speed-responsive apparatus for aircraft
1949	2,480,131	Improved production of complex tones with clavier

Year         Number      Inventor(s)                 Title/Description

1934 1,956,350 Hammond Electrical Musical Instrument (original organ patent)

1936 2,036,892***Smiley Art of Producing Musical Sounds Electronically (RE20825)

1936 2,083,246***Smiley Electronic Musical Instrument(RE20831)

1937 2,099,204 Hammond Multiple Key Switch (keyboard switch contacts)

1938 2,117,002* Hammond Keyboard for Musical Instruments (keyboard construction)

1938 2,126,464***Hammond Electrical Musical Instrument (Touch sensitive circuit)

1938 2,126,682***Hammond Electrical Musical Instrument (Tube frequency divider)

1939 2,159,505 Hammond Electric Organ (chorus generator)

1939 2,161,706 Hammond Electrical Musical Instrument (Delay circuit)

1939 2,173,888 Smiley Electronic Musical Instrument (Grid-bias keying)

1940 2,203,432 George, Hammond Electrical Musical Instrument (6 oscillators)

1940 2,203,569 Hammond Musical Instrument (Solovox)

1940 2,216,513 Hammond Electrical Musical Instrument (Slow decay with capacitors)

1940 2,211,205 Hammond Reverberation Apparatus (Shipping lock for 2,230,836)

1940 2,214,764 Hammond Electrical Musical Instrument (Electrostatic tone generator)

1940 2,221,188 Hammond Electrical Musical Instrument (Swell and tremulant circuit)

1940 2,224,729 Hammond Electrical Musical Instrument (Improved grid-bias keying)

1941 2,230,836 Hammond Electrical Musical Instrument (Original reverb patent)

1941 2,233,258 Hammond, Hanert Electrical Musical Instrument (Solovox keyboard)

1941 2,241,363 Hammond Electrical Musical Instrument (Auto pedal note)

1941 2,245,337 Hammond Electrical Musical Instrument (Tube top octave generator)

1941 2,245,338 Hammond Musical Instrument. The amazing Novachord

1941 2,251,051 Hammond Electrical Musical Instrument (Tone control)

1941 2,251,052 Hammond Electrical Musical Instrument (Vibrating reed vibrato)

1941 2,253,782 Hammond Keyboard for Electrical Musical Instruments (Solovox)

1941 2,254,284 Hanert Electrical Musical Instrument (Single octave keyboard)

1941 2,254,366 Hammond Variable Impedance (Swell pedal system)

1941 2,260,412* Stephens Key Action for Musical Instruments (keycomb, etc.)

1941 2,262,179 Hammond Musical Instrument (Novachord case)

1941 2,262,494 Hammond Electrical Musical Instrument (Touch sensitive circuit)

1941 2,266,030 Hammond Electrical Musical Instrument (Envelope control)

1942 2,274,199 Hammond Electrical Musical Instrument (4-Channel organ system)

1942 2,276,389 Hammond Electrical Musical Instrument (Octave dividers)

1942 2,301,869 Hammond Frequency Generating System (Tube oscillators)

1942 2,301,871 Hanert Electrical Musical Instrument (Double touch keyboard)

1943 2,310,429 Hanert Electrical Musical Instrument (Multi-channel organ)

1943 2,314,496 Hammond Electrical Musical Instrument (Unusual tonewheel generator)

1943 2,323,392 Hammond, George Electrical Musical Instrument (Vibrato circuit)

1943 2,332,076 Hammond, Hanert Electrical Musical Instrument (Improved 4-channel organ)

1944 2,342,338 Hanert Electrical Musical Instrument (Percussion sound generator)

1944 2,357,191 Hanert Electrical Musical Instrument (Single octave pedal clavier)

1945 2,373,560 Hanert Sound Recording Method and Apparatus (Recording with vibrato)

1945 2,382,413* Hanert Electrical Musical Apparatus (Scanner vibrato)

1947 2,429,226 Hanert Electrical Musical Instrument (Keying system)

1947 2,432,151 Hammond Amplifying System (Amplifier with auto gain control)

1949 2,480,131 Hammond Electrical Musical Instrument (Coil-springs with pickups)

1949 2,480,132* Hammond, Hanert Electrical Musical Instrument (Single octave pedal clavier)

1950 2,498,367 Hammond, Hanert Electrical Musical Instrument (Chorus generator)

1950 2,499,244* Hammond, Stephens Pedal Clavier for Musical Instruments (spinet pedal clavier)

1950 2,500,820 Hanert Electrical Musical Instrument (Tube generators w/chorus effect)

1950 2,500,821 Hanert, Hammond Electrical Musical Instrument (Pedal generators w/slow decay)

1950 2,501,172 Hammond, Hanert Electrical Musical Instrument (Bass tone generator)

1950 2,506,451* Hammond Organ Console (M series spinet console design)

1950 2,508,514 Hanert, Hammond Electrical Musical Instrument (Complex first octave tonewheels)

1950 2,509,923* Hanert Electrical Musical Apparatus (Scanner vibrato improvements)

1951 2,560,568* Hammond, Hanert Vibrato Apparatus (Variable capacitor scanner)

1951 2,565,512* Meinema Tone Control Apparatus (Improved drawbars)

1951 2,577,752 Hanert Tone Quality Control Circuit for Electrical Musical Instruments.

1951 2,577,753* Hanert, Hammond E.M.I. with Tone Sustaining Means (M series pedal sustain)

1952 2,580,424 Hanert Vibrato Apparatus for Elec. Musical Inst. (Tube vibrato)

1952 2,583,566* Hanert Elec. Musical Inst. (Manual selective vibrato, 3 series)

1953 2,626,325** Hammond, Stephens Pedal clavier switch mechanism.

1953 2,645,968 Hanert Electrical Musical Instrument (Tube organ).

1953 2,646,468* Hanert Ear response compensated volume control apparatus.

1954 2,681,585 Hanert Elec. Musical Inst. Producing Chorus Effects (Tube chorus)

1957 2,790,906 Hammond Electronic oscillator (Adjacent notes share oscillator)

1958 2,828,659 Hanert Electrical musical instruments {Percussion circuit)

1958 2,835,876 Hammond Adjustable inductance (Adjustable inductors for tuning)

1958 2,845,831 Hammond Keyboard & Switching for E.M.I. (Chord organ buttons)

1958 2,846,913 Hammond Circular scale electrical musical instrument.

1959 2,878,708 Hanert Capacitive switching apparatus (Manual keying)

1960 2,905,040 Hanert Method and Apparatus for Producing Chorus Effects in Music.

1960 2,922,329 Hanert Elec. Musical Inst. with Multiple Utilization of Tone Sources.

1966 2,933,004 Wehrmann Combined Piano and Electrical Monophonic Instrument.

1960 2,943,527 Hanert Adjustable Tune Producing Instrumentality.

1960 2,949,805 Hammond Artificial Reverberation Control Apparatus.

1960 2,951,412** Hanert Electrical Musical Instrument with Percussion Apparatus.

1960 2,953,055** Hanert Percussion Tone Electrical Musical Instrument.

1960 2,953,056 Hanert Percussion Tone Electrical Musical Instrument.

1961 2,967,447** Hanert Apparatus for Translating Electrical Musical Tone Signals into Sound (Reverb)

1961 2,972,273 Hanert Polyphonic Percussion Control Apparatus.

1961 2,982,819** Meinema et. al. Artificial Reverberation Apparatus ("Necklace" Reverb)

1962 3,037,414** Meinema Artificial Revereration Control Apparatus.

1962 3,048,072 Hanert Apparatus for Producing Psuedo-Stereophonic Effects.

1962 3,051,032 Hanert Single Manual Double Countermelody Electrical Musical Instrument.

1962 3,070,659 Hanert Artificial Reverberation Control Apparatus.

1963 3,077,136 Hammond Capacity Tuned Oscillator.

1962 3,109,878 Hanert Percussion Tone Monophonic Electrical Musical Instrument.

1966 3,260,784 Wehrmann Electronic Musical Instrument Having One or More Keyboards.

There are also a number of Design Patents:

1950 158,625 Stephens Electrical Musical Instrument (M series spinet, offset manuals, 1 octave pedals)

1961 190,140 Palma Electric Organ (A-122 Contemporary console design)

1962 192,450 Miller Electric Organ (A-102 French Provencial console design)

1962 192,882 Miller Electric Organ (A-101 Traditional console design)

* These patent numbers are found on the nameplate of M3 organs dating around 1953-1954.

** In addition to the patent numbers on the M3, these patent numbers are found on the nameplate of M100 organs.

*** In addition to 2,117,002, these patent numbers are found on Novachord nameplates 

Laurens Hammond was echter nooit tot zijn prestaties gekomen zonder de hulp en inventiviteit van:

John Hanert, alléén al goed, voor 70 (!) patenten, o.a. Scanner vibrato, de Nagalm-veer, de B-3 Percussion, etc.

maar ook :

Gilbert Smiley (Grid-bias keying)

W J Wehermann

Herbert Meinema (veel reverb-ontdekkingen en toepassingen) en inderdaad van nederlandse komaf

George Stephens (Hoofd Operational Engineering)

en

Thomas George 

Op de hieronder aangegeven site zijn alle patenten per stuk uitvoerig te lezen. Ga naar de site, type het patent nummer uit de bovenstaande lijst in het hokje "QUERY" en je kunt het hele specifieke patent doornemen.

http://patft.uspto.gov/netahtml/PTO/srchnum.htm

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