[Jukebox-list] (no subject)

[David Breneman]

--- Karl <karlh44 at knology.net> wrote:

> I have the manual but I am having a hard time understanding
> the "Pulse" concept. It sounds like it allows the converter to
> rotate longer or shorter depending on the letter/number chosen??? I
> admit this is probably fairly elementary to those who know these
> older jukeboxes, but I don't.

So if I was to analogize it as a two-dimentional Strowger 
telephone switch, that wouldn't help?  :-)

The selector sends a series of pulses. Just square-wave
AC pulses.  I assume the H is the same as the G.  So A
is one pulse, B is two pulses, etc. The selection
receiver rotates a rotary switch via a ratchet/pawl
mechanism, one notch for each pulse.  Then there's a
pause between pulses, so the receiver now switches to a
second ratcheting rotary switch.  Which does the same
thing for the number part of the selection.  5 is five
pulses, 8 is eight pulses, etc.  When the pulses stop,
each of the two rotary switches is aligned over a set
of contacts unique to that selection.  Now the selection
arm starts to rotate over the pinbank.  It also has two
rotary switches connected to it.  When those switches
receive voltage from the first two switches, it means
that the selection arm is over the pin corresponding
to the selection made.  The pin is pushed, the first
set of rotary switches is released, and the machine is
ready to accept another selection.


David Breneman         david_breneman at yahoo.com

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