5 Apr
2010
5 Apr
'10
11:12 a.m.
On 4 Apr 2010 at 1:29, CSquared wrote:
I do remember the 084 was one more screaming fast
card sorter; I
rather suspect that brush bounce etc. was just too much to cope with to
achieve reliable operation at that speed. I'm trying unsuccessfully to
remember just what the read rate was for the 084. Anyone remember?
One doesn't need a memory with the web. From the Columbia university
web site http://www.columbia.edu/acis/history/sorter.html:
Type 84 19?? 2000 cpm
"For some reason, IBM didn't produce a card reader that operated at
2000 cpm. The 084 was unique in that it used a vacuum-assist card-
feed mechanism that did not require the use of a card-weight, as the
cards were held against the throat and picker knives by suction. The
084 also used an optical method of detecting card punches instead of
the wire brush used by earlier models. "
I never got to use an 084, just an 082--there must have been a
jillion of those in service.
--Chuck