Thanks Josh, I read through both patents but struggled to fully understand what they described. Unfortunately patents are written in broad terms to cover as much as possible.
It was very interesting nevertheless. Best regards Tom Hunter On Mon, Jul 19, 2021 at 4:52 PM Joshua Rice via cctalk < cctalk@classiccmp.org> wrote: > > > > ------ Original Message ------ > From: "Tom Hunter via cctalk" <cctalk@classiccmp.org> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk@classiccmp.org> > Sent: Monday, 19 Jul, 2021 At 06:33 > Subject: DEC PDP-8/e H212 core mat repair > I am curious if anyone has attempted to repair (replace) a broken wire > in a > PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible > without > a microscope. I cannot imagine how these were even manufactured and > wonder > if DEC service centers repaired core mat faults or if faulty boards were > simply discarded. > CDC 6600 cores were huge in comparison and I would not hesitate to > replace > a broken core wire on those. > Best regards > Tom Hunter > > > These patents might be enlightening. I'm sure there's others, but these > are some i've found on a quick search. > https://patents.google.com/patent/US4161037A > <https://patents.google.com/patent/US4161037A> > https://patents.google.com/patent/US3668664 > <https://patents.google.com/patent/US3668664> > Josh >
