History--1957 telegraph supply paper

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Most of us who used punched cards or paper tape probably
never gave much thought to where the raw stock came from.
But back in the days of widespread telegraph use, paper
tape was a key product and papermakers advertised their
quality.

Below is a link to a 1957 ad from Railway Signaling
& Communications for "laboratory tested" high grade paper tape.

https://books.google.com/books?id=bjkjAQAAMAAJ&dq=railway%20signaling%20and%20communications&pg=RA2-PA49#v=onepage&q&f=false

Here is another ad for their product:
https://books.google.com/books?id=bjkjAQAAMAAJ&dq=railway%20signaling%20and%20communications&pg=RA9-PA17#v=onepage&q&f=false

Note on the following page is an ad for line-pole glass insulators
by Owens-Corning.  This is another product we'd take for granted
but was important, and advertisers touted their quality.
(One problem with such insulators was that hunters liked
to use them for target practice, resulting in high maintenance
expenses.  "Open wire" lines by communication carriers remained
in service for many years.)

Re: History--1957 telegraph supply paper
On Sunday, September 8, 2019 at 4:49:48 PM UTC-4, HAncock4 wrote:
Quoted text here. Click to load it

P.S.
Right after my post I saw a Verizon truck with a fresh wooden pole on
it being hauled someplace.  The linemen are still out there.

Open wire lines required design to prevent crosstalk and  
current leakage.   Wires were often transposed at certain
distances to reduce leakage (inductance and capacitance).  
The design of insulators was important to prevent leakage,
especially if the insulators got wet or dirty.

As to paper tape, before inexpensive and reliable computer
memories came along, punched cards and paper tape had to  
suffice.  In communications applications, punched tape
often acted as a store-and-forward medium.  The tape
had to be physically durable to not break while going
through the punches, readers, and winders.

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