Freddi here are some newer patents...

moray james · 18th January 2007, 04:23 AM

Hey Freddy here are some that you may find interesting. The good ideas stick around and get used. Hope there is some additional ideas for this old idea. When an idea gets patented as many times as this one i think that it's a safe bet it's a good one.

US # 4,722,418
US # 5,056,616
US #6,628,799

Ron E · 19th January 2007, 12:29 AM

Here's some more:
http://www.freepatentsonline.com/crazy.html

Keld · 19th January 2007, 04:46 PM

another site, unfortunally not updated since August:
http://colitz.com/site/wacky/wackyold.htm

freddi · 20th January 2007, 01:30 AM

not much new thinking re-hashing the R-J - one patten looks bad -- do make ok reflex and port sums with driver

cat exerciser is exciting

18" R-J syle vented - got 4 - 2 this size 2 larger - low q low mass 18 are ok things

this 6.2CF box with 0.25/103g 18 played pretty well adn its vent didn't chuff like what might happen in one of those patents

moray james · 20th January 2007, 01:39 AM

still making people think and still works. Would bear further investigation to see if a model could be worked out. Would seem to be a cross between a reflex vent and a aperiodic vent (as a result of the high friction. Would seem to have the best features of each. Regards Moray James.

freddi · 20th January 2007, 04:05 AM

hey Moray -- my RJ's aperture came from a 1953 diy article where builder even employed de-Q-ing holes through the front and sub baffle ! IIRC didn't have a lot of chamber volume - speaker was 18 and baffle made of good old asbestos.

Best,
Freddy

18th January 2007, 04:23 AM	#1
moray james diyAudio Member Join Date: Aug 2003 Location: Calgary on the Bow	Freddi here are some newer patents... Hey Freddy here are some that you may find interesting. The good ideas stick around and get used. Hope there is some additional ideas for this old idea. When an idea gets patented as many times as this one i think that it's a safe bet it's a good one. US # 4,722,418 US # 5,056,616 US #6,628,799 __________________ moray james

19th January 2007, 12:29 AM	#2
Ron E diyAudio Member Join Date: Jun 2002 Location: USA, MN	Here's some more: http://www.freepatentsonline.com/crazy.html __________________ Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan Science is a way of thinking much more than it is a body of knowledge. --Carl Sagan

19th January 2007, 04:46 PM	#3
Keld diyAudio Member Join Date: Jan 2002 Location: Borås, Sweden, Tellus	another site, unfortunally not updated since August: http://colitz.com/site/wacky/wackyold.htm __________________ "What is done by what is called myself is, I feel, done by something greater than myself in me." James Clerk Maxwell. 1879

20th January 2007, 01:39 AM	#5
moray james diyAudio Member Join Date: Aug 2003 Location: Calgary on the Bow	50 years later.... still making people think and still works. Would bear further investigation to see if a model could be worked out. Would seem to be a cross between a reflex vent and a aperiodic vent (as a result of the high friction. Would seem to have the best features of each. Regards Moray James. __________________ moray james

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20th January 2007, 01:30 AM	#4
freddi diyAudio Member Join Date: Aug 2005	not much new thinking re-hashing the R-J - one patten looks bad -- do make ok reflex and port sums with driver cat exerciser is exciting 18" R-J syle vented - got 4 - 2 this size 2 larger - low q low mass 18 are ok things this 6.2CF box with 0.25/103g 18 played pretty well adn its vent didn't chuff like what might happen in one of those patents

20th January 2007, 04:05 AM	#6
freddi diyAudio Member Join Date: Aug 2005	hey Moray -- my RJ's aperture came from a 1953 diy article where builder even employed de-Q-ing holes through the front and sub baffle ! IIRC didn't have a lot of chamber volume - speaker was 18 and baffle made of good old asbestos. Best, Freddy

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