Eric, the 3/16th holes were used to check the pinfeed holes in the paper.
Eventually the paper suppliers became good enough the pinfeed holes were
almost perfect. In the early days it could be a problem.  No idea about the
other holes.
--
Dale Strommer
[log in to unmask]


"Eric H. Sand" <[log in to unmask]> wrote in message
news:a5jgjf0235o@enews4.newsguy.com...
Well, the oldest computer relic I have is a 1969 Standard Register Company
15" stainless steel ruler for marking up 132 column report outlines. There
is an edge for calculating the number of cards per inch(150) and one for
calculating the number of lines down a page(6 per inch) as well.
Indispensable in its day it was. There was one in every pallet of green-bar
that arrived in receiving and one day I was at the right place at the right
time.. Still use it every day, but the 80 column cards are getting hard to
find.

Trivia question...There are thirty(30) 3/16th inch holes along one edge of
this "ruler", two(2) 5/16th holes along the other edge aligned at one end,
and two(2) 7/16th holes along the same edge but at the other end. What were
these used for?


                     Eric Sand
                     [log in to unmask]

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *