00:00 - Together at last! Something I've never seen!
01:15 - "Breaking the glass"
02:05 - "Breaking the glass, at the same time!"
04:40 - We just ran 9 interleaved rounds sequentially! Resetting...
05:30 - Reset complete, it all just works.
06:30 - Get to the fire faster
07:05 - The honeywell coded system couldn't do this
08:55 - Fire vs Combination Howe Differences
11:45 - Wiring, easier than Honeywell!
13:30 - Conclusion
With the wiring, I counted 4 wires between them, but this is because you need to loop the ground/negative back to the first station. I believe in practice, they were wired class-A, so 3 in, 3 out, to every station, with the last station's "outs" joined to the first station's "ins". This would have also completed the required loop of the negatives/ground - which is used to switch between the stations/rounds.
This is definitely simpler than the 5in/5out wires required by the honeywell system! My initial hypothesis is that they avoided an extra wire loop, or two, by using that ingenious special "first click" the wheel does upon activation. I suspect this puts the wheel into a "hold" position, causing the transmitter only take it's ground from the input side of the loop, as opposed to the output side, under normal conditions. If there's no other stations running, then the loop is still complete in either direction, and it continues past that point on the wheel, however, if another one is running, the incomplete loop effectively causes the station to hold, until the currently running station reaches it's "end" position, or reaches it's equivalent "hold" position, either of which, completes the loop, temporarily in the case of "hold", which, causes that station to provide power to the others for that one step - and if another station is calling to run - it will click past it's hold position, cutting power to the previously running station, and the cycle then continues, until every station has reached it's "end".