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OnlineRecords0
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Unused patent? (Again)

Sun Mar 14, 2021 12:45 am

I was looking at patents again and I found this. It doesn’t look to be any or any part of the ACA sirens we know. Anyway, here’s the pictures!
FB8D5AAA-D139-48DA-A106-E190EC52DCC0.png
FB8D5AAA-D139-48DA-A106-E190EC52DCC0.png (42.64 KiB) Viewed 2204 times
66BAEEF0-1577-4657-8503-FD34BA038E3B.png
66BAEEF0-1577-4657-8503-FD34BA038E3B.png (36.7 KiB) Viewed 2204 times
Link: https://patents.google.com/patent/US479 ... .+Biersach

Any info would be nice!
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Re: Unused patent? (Again)

Sun Mar 14, 2021 6:01 am

could be an early design for one of their omnidirectional electronic sirens?
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Re: Unused patent? (Again)

Sun Mar 14, 2021 1:07 pm

Hmmm.. That gives me Hormann vibes, could it possibly be something like that?
Sirens may not be sexy, but they sure work.

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Re: Unused patent? (Again)

Sun Mar 14, 2021 1:54 pm

When did Quadrens come about? This could've been a very primitive prototype of the Quadren, even if it had different "features."
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OnlineRecords0
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Re: Unused patent? (Again)

Sun Mar 14, 2021 3:31 pm

Some_3t22s wrote:
Sun Mar 14, 2021 1:54 pm
When did Quadrens come about? This could've been a very primitive prototype of the Quadren, even if it had different "features."
Could have been a prototype. The Quadren patent itself doesn’t appear to have any of the pictures above.

Quadren patent: https://patents.google.com/patent/US532 ... .+Biersach
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Re: Unused patent? (Again)

Sun Mar 14, 2021 4:26 pm

Orange wrote:
Sun Mar 14, 2021 3:31 pm
Some_3t22s wrote:
Sun Mar 14, 2021 1:54 pm
When did Quadrens come about? This could've been a very primitive prototype of the Quadren, even if it had different "features."
Could have been a prototype. The Quadren patent itself doesn’t appear to have any of the pictures above.

Quadren patent: https://patents.google.com/patent/US532 ... .+Biersach
This could very well be a prototype. I obviously have no idea if that's fact, but it seems possible since the cell designs with their outlets are vaguely similar.
Iowan citizen in a land of T-128s, 2001s and 4004/4008s among many others.

"The middle class worker wouldn't want to work on a whole bridge, a half bridge is much easier."
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Re: Unused patent? (Again)

Sun Mar 14, 2021 7:47 pm

It’s an unused design whether or not it was actually made. Patents are full of these unused ideas. Read up on the patent abuse in the tech sector to see how these things work.

Not hard to understand.

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Re: Unused patent? (Again)

Fri Apr 09, 2021 3:54 am

This patented design actually presents significant acoustical challenges.

A plurality of compression drivers are shown radiating into a disc shaped chamber, but the wave expansion is not smoothly and seamlessly preserved from each of the compression drivers, which will reduce the efficiency of the horn loading. This design also creates the possibility for wave energy to radiate from one compression driver over to another, which would cause a great deal of loss at high frequencies due to out-of-phase energy bouncing around in the chamber and canceling output from adjacent drivers. The third issue is an issue shared by all "Manifold" compression driver systems - the acoustic load of the horn increases as more drivers are fed into one path, so the horn starts resisting the efficient operation of the compression drivers, so that a pair of compression drivers whose level would add to +6dB actually only add up to +1.5-2.5 dB - you don't get a true doubling of pressure from two sources. This has been the finding of studies of systems like ElectroVoice "Manifold Technology" speakers which load two or four compression drivers onto a single horn through an adapter.

Based on all this, I would say this patent is best left in the past, unused.

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