Date: Wed Feb 28 16:34:47 2007 Back to Contents

Author: cablem

Subject: Re: jumping disc

I contacted a few and got no response from anyone. Perhaps I didn't
contact the right ones...and it was so long ago that I no longer
remember who I contacted.


On 2/28/2007 2:30 PM, Dan Beeker wrote:
> Perhaps one of the temperature thermostat companies could be a source? They
> commonly use bimetallic discs in their products. I have visions of millions
> of the things flowing through assembly bins somewhere in the far east.
> Dan Beeker
> Undergraduate Physics Lab Coordinator
> Swain West 115
> Physics Department, Indiana University
> 727 E. 3rd Street
> Bloomington, IN 47405
> Phone: (812) 855-5903
> Fax (812) 855-5533
> -----Original Message-----
> From: [] On
> Behalf Of cablem
> Sent: Wednesday, February 28, 2007 9:39 AM
> To:
> Subject: Re: [tap-l] jumping disc
> This is true...I've talked to Edmunds about it because I wanted to have
> more made as a PIRA advertising thing one year. I also talked to a lady
> who was interested in trying to make them in her garage, but I don't
> think it ever happened. She'd have contacted me if it had 'cause I'd
> have ordered several hundred. To my knowledge, they're not available
> anywhere.
> Chele
> On 2/27/2007 8:43 PM, Br. R.W. Harris wrote:
>> My recollection is that the person who ran the machine which made them
>> died and took the secret to the grave. So far there hasn't been anyone
>> who could find the proper settings to make it work..
>> If anyone else knows a better answer, I would also like to know also
>> if these things are available.
>> R.W.Harris
>> ----- Original Message ----- From: "Anthony Lapinski"
>> To: ; ;
>> Sent: Tuesday, February 27, 2007 4:47 PM
>> Subject: [tap-l] jumping disc
>>> Years ago Edmunds sold a tiny metal curved disc in the shape of a
>>> small shallow "bowl" (? 1.5 cm diameter). I believe you pushed it the
>>> other way, held it to warm it up, placed it on a table, and it
>>> eventually snapped back into place upon cooling and "jumped" off the
>>> table (similar to the rubber "poppers" sold today, which look like
>>> half racquet balls).
>>> Does anyone know if there is a new manufacturer for these discs, or
>>> where
>>> I might find them in surplus?

Machele Kindle
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142

"Get Fuzzy"

Bucky, the arrogant cat: Aaaaaaaa!

Rob, the geeky owner: 11:55. Right on time for his nightly freakout.

Satchet, the lovable dog: Ever notice how he runs circles in the same direction?

Buckey: Yaaaaaaaa!

Rob: Maybe the coriolis effect works on cats, too, eh?

Satchet: Ha, ha! I have NO idea what that means!

From Wed Feb 28 16:34:47 2007