[78-L] Fading sounds [fwd]

[Steven C. Barr]

From: "Jeff Lichtman" <jeff at swazoo.com>
>>I can recall gasoline-powered "threshing machines" thar worked the
>>same way; the governor only allowed a spark when the speed had
>>deopped below a given level. Thus. their sound was "bang" "whoosh,
>>whoosh, whoosh, whoosh, bang!"
>>Steven C. Barr
> The governor on this type of engine (called a "hit and miss" engine)
> typically controls the exhaust valve, not the ignition. The intake
> valve opens by cylinder vacuum, not with a cam. The governor holds
> the exhaust valve open until the engine slows down to a set point, at
> which point it allows the exhaust valve to close. The cylinder pulls
> a vacuum on the next down stroke, which opens the intake valve and
> lets a charge in. The spark plug fires every other revolution
> regardless of whether there's a charge in the cylinder.
>
tHsnxes muchly fop the explanation! I saw A LOT of  these old machines;
Pontiac, Ill's.had a HUGE "Threshernen's Reunion every summer...which
also included a large flea market (which is why I went every year!).

Oddly enough, this IS 78-related...one summer I found (for 50 cents each!)
A blue-wax 12" Columbia which is NOT in ADBD(!) and an "extended-play:" 12" 
Colimbia featuring Ted Lewis on one sids and Hate Smith on
the other...!

Steven C. Barr