[Milsurplus] [ARC5] Discovering Old Mail: First USA Jet Flight - October 1942

[C.Whitaker]

de WB2CPN
About the Door Bell.  When the USAF Control Towers began to
use Kollsman "Altimeters", the panel had a  buzzer and a push
button in it.
You could tell whether the barometer was rising or falling by noting
which way way the needle went when the little buzzer was used.
I have one of those altimeters I found one day in 1962.  It still
works very well.  I just tap the glass.
73  Clete
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On 12/10/2011 12:57 PM, Todd, KA1KAQ wrote:
> On Sat, Dec 10, 2011 at 11:02 AM, David Stinson<arc5 at ix.netcom.com>  wrote:
>
>> How about that "door bell" solution to the sticking
>> gauges problem?  Men after my own heart!
> Which follows the same decoherer principals used with the Branly
> Coherer from the late 19th century. Same effect, different causes.
> Nothing like good ol' ingenuity to solve an apparently complex
> problem!
>
> That's a great flick, Dave. Thanks for reposting it.
>
> ~ Todd,  KA1KAQ/4
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