Hi Dale,
I've had several replies, notably from Stan S. and Arnold K.
The 30 3/16th inch holes(1/2 inch apart) are aligned for the pinfeed holes
of continuous paper and were used to calculate offsets as well as to make up
carriage control tapes for the(then current) line printers.
The 5/16 and 7/16 inch holes were set 2.75 and 4.25 inches apart to
correspond with physical filing folders when holes were punched in the
paper. On my ruler there is the term "STANDARD SPACING FOR FILE HOLES" which
I believe applies to them.
I've misplaced it many times and a girl friend once hid it on me, but
somehow it stays with me...
Eric Sand
[log in to unmask]
> -----Original Message-----
> From: Dale Strommer [SMTP:[log in to unmask]]
> Sent: Thursday, February 28, 2002 3:02 PM
> To: [log in to unmask]
> Subject: Re: [HP3000-L] fun contest - oldest relic you have
>
> 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]
>
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