wrote:
>
> Does anyone know where one might find the newer type drum recorders.
>
> I have a whole shed full of the old ones which move laterally as the drum
> turns,
> but I've been asked to set up a seismic display in a public area and I'm
> just
> not happy using the old drum recorders.
> And I think the giant pen motors I have... must be 80 years old... if not
> older.
>
> Jan in Gilroy....
>
Hi Jan and all,
I suppose the "drummers" will shudder with this suggestion for finding a new
use out of the parts. I've only actually tore one up to find out what is actually
in one; so, the age, model, will probably vary in what one finds...or....can
re-utilize. It was actually the drum itself which offered up the most high value parts.
The drum "could" house a fitting size seismometer, and 3 screws could be
installed for leveling. Inside, the model I had was acouple brass masses, (balance?) which
"could be" utiltized in a seismometer. The frame can offer up a variety of aluminum
pieces. Even the molded large frame itself, could be utilized as a strong seismometer
brace/frame. What the heck......at least it could be salavaged for such seismology use. I
did not find the actually penmotors to be of much value....but they were interesting
to see.
Actually (yes more), some of the very old "seismoscopes" also look like they could
be re-utilized, into a variety of S-G's; or, hanging mass seismometers. Of course by
now most are either metal salvaged or in a multitude of dumps here and there....too bad.
Meredith Lamb
On 6/11/07, Jan Froom <JDarwin@.............> wrote:
Does anyone know where one might find the newer type drum recorders.
I have a whole shed full of the old ones which move laterally as the drum turns,
but I've been asked to set up a seismic display in a public area and I'm just
not happy using the old drum recorders.
And I think the giant pen motors I have... must be 80 years old... if not older.
Jan in Gilroy....