sheesh patenting and stuff.
Aren’t there any GPL, LGPL, or BSD type licenses for physical objects? (as opposed to software)
If you wanted to put this back into the community and let the community continue to develop and work on your designs, that seems like the way to do it.
You may have good intentions, but what happens when tomorrow a truck hits you and you die (sorry
), your heir sells your patents to some soulless company, and they file suit against every person found to be working with or on your design?
Or am I way off base and is the only way to “license” a physical design with a patent?
*edit*
Yeah, looks like I'm smoken da crack, I can't find a single
"Open License" that isn't set up for software, or digital media (music, video)
closest I coul dfind were creativecommons.org and www.openpatents.org
Sorry for sticking my dumb head in.
Aren’t there any GPL, LGPL, or BSD type licenses for physical objects? (as opposed to software)
If you wanted to put this back into the community and let the community continue to develop and work on your designs, that seems like the way to do it.
You may have good intentions, but what happens when tomorrow a truck hits you and you die (sorry
), your heir sells your patents to some soulless company, and they file suit against every person found to be working with or on your design?Or am I way off base and is the only way to “license” a physical design with a patent?
*edit*
Yeah, looks like I'm smoken da crack, I can't find a single
"Open License" that isn't set up for software, or digital media (music, video)
closest I coul dfind were creativecommons.org and www.openpatents.org
Sorry for sticking my dumb head in.
SmarmyDog - How heavy and big are the magnets that you purchased?
I just got my car sub today and it came with a 220 oz (6.2kg) magnet (what grade ferrite I don't know). Is there a way of comparing 'magnetic density' (if there is such a thing) between ferrite and NiB materials? Like comparing magnetic fields vs. weight or volume. Maybe a more important one would be magnetic field strength vs. price
I can't wait to see some pics of your work. Sounds really impressive 😀
I just got my car sub today and it came with a 220 oz (6.2kg) magnet (what grade ferrite I don't know). Is there a way of comparing 'magnetic density' (if there is such a thing) between ferrite and NiB materials? Like comparing magnetic fields vs. weight or volume. Maybe a more important one would be magnetic field strength vs. price
I can't wait to see some pics of your work. Sounds really impressive 😀
Hi Fr0st:
There was a thread ab0ut a year ag0 (diyAudio Forums > Top > Loudspeakers > Loudspeakers > Alnico) that debated the strength, c0st, and weight trade0ffs between ceramic, Ne0dymium, and Alnic0 magnets. It’ll pr0bably answer m0st 0f y0ur questi0ns.
The c00l thing ab0ut this Parthen0n thread is the strength and massive displacement capability 0f Dan’s m0t0r.
I went with Ne0dymium because I wanted small, self-shielding m0t0rs and the Ne0’s fit nicely within the v0ice c0ls but still gave me a s0lid, flat 0.8 Tesla 0ver a 1.25” distance.
M0st 0f the subs in my big-0l’-pile 0f t0rmented w00fers have huge ceramic magnets. The few Ne0 subs I have are fairly weak perf0rmers since they were designed with a paltry 8mm Xmax – pretty wimpy excursi0n f0r a sub.
-Casey Walsh
There was a thread ab0ut a year ag0 (diyAudio Forums > Top > Loudspeakers > Loudspeakers > Alnico) that debated the strength, c0st, and weight trade0ffs between ceramic, Ne0dymium, and Alnic0 magnets. It’ll pr0bably answer m0st 0f y0ur questi0ns.
The c00l thing ab0ut this Parthen0n thread is the strength and massive displacement capability 0f Dan’s m0t0r.
I went with Ne0dymium because I wanted small, self-shielding m0t0rs and the Ne0’s fit nicely within the v0ice c0ls but still gave me a s0lid, flat 0.8 Tesla 0ver a 1.25” distance.
M0st 0f the subs in my big-0l’-pile 0f t0rmented w00fers have huge ceramic magnets. The few Ne0 subs I have are fairly weak perf0rmers since they were designed with a paltry 8mm Xmax – pretty wimpy excursi0n f0r a sub.
-Casey Walsh
Massive Excursion driver
I once had an idea for a massive excursion driver using commutated voice coils. unfortunately tom danley thought of it first and had already patented it. I think using multiple commutated coils could easily produce an ultra high excursion driver without requiring a giant magnet. I think 10-12 coils could get excursion well into the 8" range. The only problem would be switching between coils. it could be done using a standard contact commutator but that would surely introduce noise. perhaps some sort of a switching module that monitors cone excursion would work nicely. It could also employ a servo correction loop like the Velodyne subs. Such a voice coil set up could provide massive excursion, improved transient response, higher power handling, less distortion, and higher efficientcy. As for suspension. i would suggest dual spiders, one on each side of the magnet assembly. that would keep the voice coil motion very linear. a conventional half roll surround would need to be very wide and likely impractical. i have an idea on an accordian style surround which would avoid the loss of sd.
they dont pay me to think
I once had an idea for a massive excursion driver using commutated voice coils. unfortunately tom danley thought of it first and had already patented it. I think using multiple commutated coils could easily produce an ultra high excursion driver without requiring a giant magnet. I think 10-12 coils could get excursion well into the 8" range. The only problem would be switching between coils. it could be done using a standard contact commutator but that would surely introduce noise. perhaps some sort of a switching module that monitors cone excursion would work nicely. It could also employ a servo correction loop like the Velodyne subs. Such a voice coil set up could provide massive excursion, improved transient response, higher power handling, less distortion, and higher efficientcy. As for suspension. i would suggest dual spiders, one on each side of the magnet assembly. that would keep the voice coil motion very linear. a conventional half roll surround would need to be very wide and likely impractical. i have an idea on an accordian style surround which would avoid the loss of sd.
they dont pay me to think
^bump^
I really do hope this DIY parthenon works out! Its great when DIY efforts achieve alot!!!!
DIY parthenon on 10m exponential horn of 30sq m mouth area
:devilr
🙄
I really do hope this DIY parthenon works out! Its great when DIY efforts achieve alot!!!!
DIY parthenon on 10m exponential horn of 30sq m mouth area
:devilr🙄
Watching and wishing
Shop is getting less messy and I should have some room in about a month. It ain't dead yet.
Oh yeah an idea for the large top plates. Large diameter plumbing valves are to found in scrap dealers lairs. The coupling flages are about the right thickness and diameter if you are picky. And cast iron has pretty damn good magnetic properties having none to much carbon. Still thinking
Mark
Shop is getting less messy and I should have some room in about a month. It ain't dead yet.
Oh yeah an idea for the large top plates. Large diameter plumbing valves are to found in scrap dealers lairs. The coupling flages are about the right thickness and diameter if you are picky. And cast iron has pretty damn good magnetic properties having none to much carbon. Still thinking
Mark
Hi mwmkravchenko
Just an observation - what makes cast iron cast iron is its very high carbon content. If your objective is low-carbon, you're better off with mild steel.
Just an observation - what makes cast iron cast iron is its very high carbon content. If your objective is low-carbon, you're better off with mild steel.
Iron is tricky Stuff
It depends primarily on it's purpose as to how much carbon the iron has in it. Different types sre grey iron which is usually low carbon, malleable iron has more silicone and I can't remember what else but not much carbon. The sole difference between iron and steel is the carbon content. You can tell by how it fractures. It should break in a very fine crystaline pattern if it is a good quality grey iron.
Or so tells a gentelman I talked to at a foundry. My casting experience is limited to aluminum.
Mark
It depends primarily on it's purpose as to how much carbon the iron has in it. Different types sre grey iron which is usually low carbon, malleable iron has more silicone and I can't remember what else but not much carbon. The sole difference between iron and steel is the carbon content. You can tell by how it fractures. It should break in a very fine crystaline pattern if it is a good quality grey iron.
Or so tells a gentelman I talked to at a foundry. My casting experience is limited to aluminum.
Mark
Instead of rollers to center the VC in the gap, why not a properly-sized rubber O-ring fitting over the pole and inside the VC former. This would allow the VC to slide up and down in the gap by rolling on the pole and the VC former.
-steve
-steve
Hi Swarden: The o-rings I've played with tend to have a preferred rotational orientation which might modulate the sound during travel. How 'bout a Teflon coated pole piece and Teflon coating on the inside of the VC former?
HA! Bill F. -- this thread lives!!!
-Casey Walsh
HA! Bill F. -- this thread lives!!!
-Casey Walsh
Electro shock is in order
It may live if one of us ever getts off and builds this thing. I'm just to busy. But I am collecting parts!!
P.S. For the top plates I have found some cast iron weight plates that are just about perfect. Next is the magnets. 🙂
Mark
It may live if one of us ever getts off and builds this thing. I'm just to busy. But I am collecting parts!!
P.S. For the top plates I have found some cast iron weight plates that are just about perfect. Next is the magnets. 🙂
Mark
I think its a seasonal thing. It was just a few days ago I was thinking about some more work on DIY drivers.
If I had the machine shop for this project I'd be all over building that motor, but unfortunately I lack the proper equipment to create such a beast.
If I had a hammer and you had a nail???
The machine shop is not my problem. I have a buddy with a great one. Time is not on my side!!
Mark
The machine shop is not my problem. I have a buddy with a great one. Time is not on my side!!
Mark
magnets
<< I have found some cast iron weight plates that are just about perfect. Next is the magnets. >>
Mark, Ebay seems to be the way to go for the magnets. I found some a little while back that were N40 7/8" rings 1" tall. Could have bought 16 of them for $138 with shipping. I'm sure you can find more like this.
-steve
<< I have found some cast iron weight plates that are just about perfect. Next is the magnets. >>
Mark, Ebay seems to be the way to go for the magnets. I found some a little while back that were N40 7/8" rings 1" tall. Could have bought 16 of them for $138 with shipping. I'm sure you can find more like this.
-steve
- Status
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