HammondWiki - Diff: HammondPatents

Differences between version 22 and predecessor to the previous major change of HammondPatents.

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Newer page: version 22 Last edited on June 17, 2019 7:27 pm. by
Older page: version 18 Last edited on June 7, 2019 8:29 pm. by
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-If you really want to know about the technology of the Hammond organ, the best place to get a true understanding about how the organ works is to read the patents. Here is a somewhat exhausting list of Hammond patents related to musical instruments. You'll find a lot of information in the patents about concepts like LoudnessRobbing, KeyClick, etc. that really explains what is going on. There are also some patents listed here that were never used on any tonewheel Hammond organ. Here are a few of the patents issued to LaurensHammond and Hammond Organ Company engineers JohnHanert, Gilbert Smiley, W J Wehermann, Herbert Meinema, George Stephens and Thomas George: 
+If you really want to know about the technology of the Hammond organ, the best place to get a true understanding about how the organ works is to read the patents. Here is a somewhat exhausting list of Hammond patents related to musical instruments (and a couple oddball Laurens Hammond patents not related to musical instruments...) . You'll find a lot of information in the patents about concepts like LoudnessRobbing, KeyClick, etc. that really explains what is going on. There are also some patents listed here that were never used on any tonewheel Hammond organ. Here are a few of the patents issued to LaurensHammond and Hammond Organ Company engineers JohnHanert, Gilbert Smiley, W J Wehermann, Herbert Meinema, George Stephens and Thomas George: 
  
 <pre> 
 Year Number Inventor(s) Title/Description 
-1921 1,435,520 Hammond Stereoscopic Motion Picture (3d movies!) 
-1929 1,719,805 Hammond Alternating Current Clock. 
+1921 1,435,520 Hammond Stereoscopic Motion Picture (3d movies!).  
+1929 1,719,805 Hammond Alternating Current Clock (synchronous motor driven) . 
 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). 
+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). 
@@ -51,12 +51,12 @@
 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 2,480,131 Hammond Electrical Musical Instrument (Pedal clavier with coil-spring 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 2,499,244* 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). 
@@ -112,7 +112,7 @@
 To retrieve these patents, copy the patent number and search the US Patent Office: http://patft.uspto.gov/netahtml/PTO/srchnum.htm 
  
 You'll need a free tiff viewer add-in to view the images in your brower: http://www.alternatiff.com/ or http://www.internetiff.com/ 
  
-In all, Laurens Hammond had 91 patents issued to him during his career. Many of the non-organ related patents were for electric clocks and aircraft controls. 
+In all, Laurens Hammond had 91 patents issued to him during his career. The non-organ related patents were for things like 3d movies, electric clocks and aircraft controls. 
  
 See also DonLesliesPatents and CahillPatents 

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