Ultrasonic whistle design needed

[jkftl]

I am trying to come up with a variable frequency whistle (pneumatic), part of a liquid atomizing test device. Does anyone know a starting point for such old technology? Probably dealing with non-fundamental tones, but rather first harmonic or ?

 

[nbucska]

check out <

http://www.uspto.gov>

<nbucska@pcperipherals.com>

 

[Franko]

Perhaps you can contact

http://www.fedsig.com/

for applications or leads.

 

[charliebPE]

Hey jkftl,

What do you need a whistle for when atomizing? Perhaps what you really are looking for is a way to atomize a liquid using ultrasonics? If so, there are ways to make this happen using an ultrasonic transducer. Check out

http://www.uia.org

or I have several other applicable links listed on my website,

http://www.bright-engineering.com.

Charlie

 

[nbucska]

The whistle works and it is simple. The fundamental IS the
first harmonic, the second is 2X fr.

Check old patents. <nbucska@pcperipherals.com>

 

[butelja]

Another name for an ultrasonic whistle is a Galton Whistle. Try doing a web or patent search using this term.

 

[nbucska]

check out e.g. USP 4,071,225 <nbucska@pcperipherals.com>