Technique behind the Theatre Organ part 4

The complete organ design:

Console (s)
Keys (t)
Register stop key (r)
Preset stop (p)
Memory (g)
Comb contact (b)

These all relate to making contact and switching.
Only then can music be heard…

The console (s)





An old-fashioned comb relay.

Later on, other (sometimes elongated) 61-pole relays were used
in the Asta organ (including Kimberly Allen).







Register stop key (r)







Comb contact (b)