Looking through my "stuff" and found these items I have had for ages. One is a (Brown converter for continuous balance system) The other a (S.P.D.T. synchronous converter switched by 19 volt AC) What and how were they used? WW2 stuff so only you oldies may be able to help. Pictures on alt.binaries.pictures.radio Warren
What are these?
Nov 22, 2005
1 Replies
Part of a Honeywell-Brown autobalance potentiometric chart recorder. Chops the error voltage at line frequency. This is then amplified and phase split and used to drive a two-phase motor which drives a slidewire potentiometer to restore balance, and the pen/pointer assembly. Used extensively in steelworks and power stations well into the 1970s.
Pics not available here, but it sounds like another synchronous chopper as described above. Maybe Leeds & Northrup.
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)
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