4 Sep
2025
4 Sep
'25
11:55 a.m.
I think the point here is that the Type 512A and the Type 518 are not
commercial products and appear to have been made specifically for the
ENIAC. Looking for confirmation of that hypothesis. The 13 and 19
dimensions are not the same as the 12A and 18 respectively.
Bill
On Thu, Sep 4, 2025 at 2:46 PM Van Snyder via cctalk <cctalk(a)classiccmp.org>
wrote:
On Thu, 2025-09-04 at 11:35 +0100, David Wade via
cctalk wrote:
The Computer History Museum in Mountain View, CA has a 519. They might
have other models as well, or information about them. Contact Dag
Spicer <spicer(a)computerhistory.org>rg>.
Haus zur Geschichte der IBM Datenvararbeitung (House of the History of
IBM Data Processing) had a large collection in what had been a punch-
card factory in Sindelfingen, a suburb of Stuttgart. They had a 650,
1401, and 360\25 in working order. IBM sold the building and moved the
collection to the IBM technology center across the autobahn in
Böblingen. I don't know how much of the collection they retained.
Contact Hans Spengler <hhwsppb(a)t-onlind.de>de>, Werner Seebode
<werner(a)familie-seebode.de>de>, or Heinz Oberle <HOberle(a)t-online.de>de>.
I'm
looking for some information on a couple of the early
IBM unit record devices, in particular the Type 512A and
the Type 518. Ideally, I'd like to get the mechanical
dimensions in enough detail to create a CAD model.
As I assume you are aware, but perhaps others on here are not, that
these pre-date computing and must come from the era when data
processing
involved only punched cards and I feel well before the term "Unit
Record" was coined. Sadly, this seems to be a forgotten era and there
is
very little information about it on the web.