25 May
2012
25 May
'12
5:43 a.m.
On May 24, 2012, at 2:43 PM, Tony Duell wrote:
Mechncial ; I've not seen one that actually makes
contact through the
holes, but mechancial pins (often called 'peckers' over here) that went
throug hthe holes and operated contcts if said hole was there wewre
common. Normally the peckers were in a line perpendicualr to tape
movement and the tape was moved in steps, but at least one Creed serial
tape reader moved the tape continuously nd lifted the peckers in sequence
to read ech data trcak in turn, the mechansim then operated a single
contact depending on the state of the crurent pecker, thus giving a
serial output
Hm. "Pecker" means something... rather different over here.
- Dave