Goodbye ! No more speakers with cones !

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What about distributed modes, NXT etc. Surely Julian's prototype clearly shows that the Planot is nothing more than another form of NXT style speaker!!!!
When are you guys going to get it? There is no extraordinary invention or specialised physics at work here............it's simple excitation of a tube via a magnetic motor/voice coil.

Where does a conventional speaker get it's sound?..........from the vibrations generated from the voice coil.
 
What about distributed modes, NXT etc. Surely Julian's prototype clearly shows that the Planot is nothing more than another form of NXT style speaker!!!!
When are you guys going to get it? There is no extraordinary invention or specialised physics at work here............it's simple excitation of a tube via a magnetic motor/voice coil.

Where does a conventional speaker get it's sound?..........from the vibrations generated from the voice coil.
But what I don't understand, how can a tube rotating around its axis generate any sound...
 
I have already explained how the tube makes sound.:rolleyes:

The rotation of the rod is a byproduct of the way it is attached to the motor and rotates left and right exactly as it does in a hard drive, but with homing magnets to control ''over rotation''..........a sort of brake system.
Everyone seems to be fixated by the ''rotation of the rod''. This is due to the clever marketing hype on the PLanot's website. It is NOT the rotation that is causing ''pressure waves'' or anything like that.That is ridiculous!
It is only the vibrations that are moving the rod and vibrations only that produce the sound.

Have a look at all those videos on youtube entitled ''hard drive loudspeakers''. It's the same thing.

As soon a something like a light plastic cup is glued on to the bearing arm of the hard drive the sound increases in volume.

You will also notice a side by side movement of the cups which includes lots of minor rotations that are more difficult to see as they are minute compared to the longer bass wavelengths.

Replace the cups with a vertical rod, supported at the top as well as the bottom and you have the Planot clone as demonstrated in Julians video.
 
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It is NOT the rotation that is causing ''pressure waves'' or anything like that.That is ridiculous!
It is only the vibrations that are moving the rod and vibrations only that produce the sound.

Yet, reading the patent, to me it seems that the rotation causing pressure waves is what is patented. Did I misunderstand that?

jan
 
Jan: The claim reads:

A diaphragm for a rotary loudspeaker driver which radiates sound at all frequencies in its range in a 360 degree horizontal pattern and can function as a full-range driver or can be implemented as a limited frequency range driver and that eliminates phase cancellation (a) comprising the diaphragm structure with sides which have parallel and straight edges and the edges of each of these sides are parallel with the central axis of rotation, each of these sides being a simple rectangle, and the diaphragm's cross section has at least three equal sides and which is light and rigid (b) the diaphragm has a structure on both ends of its axis for attaching bearings and one or more electric motors to a rigid structure or frame (c) the diaphragm that has at least three sides and when rotated along its central axis creates a positive pressure in the surrounding medium on all sides parallel to the axis of rotation and is not subject to phase cancellation of front and back waves (d) the diaphragm in which the width of each side is equal to the width of the wavelength of the highest frequency that is to be radiated uniformly in the horizontal plane (e) whereby the diaphragm may radiate sound evenly at all frequencies within its range in a horizontal 360 degree pattern and vertically along its entire length. (italics mine- SY)

As a note, in order to infringe, ALL elements of the claim must be present.
 
Yes, that's the way I would read it. If there is a nonrectangular or nonparallel side (the examiner was sloppy here in not insisting on a tolerance), the claim would appear not to cover it. And Doctrine of Equivalents is long gone. A reading of the elements of the claim will also suggest a few simple measurements which might even exclude the device as illustrated on the website...
 
Yet, reading the patent, to me it seems that the rotation causing
pressure waves is what is patented. Did I misunderstand that?

jan

Hi,

Yes you do do. It is claimed rotating something can produce
pressure waves, it clearly can't at any wavelengths exceeding
the dimensions of the rotating part. However, it is not that
that is patented (even if it was, its worthless as it is wrong).

You can't patent a principle, right or wrong.

Patents cover the implementations of an idea, not the idea,
and if the idea doesn't work, your basically going to have a
very easy time getting your useless patent approved.

Being given a patent in no way validates the patents claims.

The patentee is protected against his/her implementation
being copied, but that is pretty useless protection if it
simply doesn't work in the first place. What people can't
do is build the same thing and claim the same things,
and in this case that hardly matters, its nonsense.

rgds, sreten.
 
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Sreten, from the claim:
when rotated along its central axis creates a positive pressure in the surrounding medium on all sides parallel to the axis of rotation

So any device fitting this description (and the other limitations of the claim) would be covered by the patent. Of course, if we assume that basic physics applies, this won't actually happen. And of course, a sound wave is alternating positive and negative pressure, so that would seem to escape the claim as well.

A lawyer writing the patent would have helped (at least from the legal standpoint, not the physics), but John seemed very unwilling to consider that and seemed quite freaked out by my offer via email to give him a hand gratis during the pre-publication application process.
 
Yet, reading the patent, to me it seems that the rotation causing pressure waves is what is patented. Did I misunderstand that?

jan

Precisely.You did not misunderstand anything. That is what is patented.
This is how you divert the reader of the patent in the hope that he or she will believe that an incredible development has been discovered that can produce high fidelity sound with only a tall thin rod rotating from side to side.
Yes it will rotate from side to side : sometimes only minutely(mid/high frequencies)and other times quite noticeably(low frequencies).

But here's the thing that many will not realise : grab the rod while it is operating, causing no ''rotation'', you will find that it still produces sound.............how can that be????
 
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