[GreenKeys] GreenKeys Digest, Vol 102, Issue 29

[Ralph Irish]

George and others:

Another device which was on some Model 28 equipment which did the same thing as the
"Idle Line Monitor" described below was an all mechanical device somewhere on the
keyboard of the 28.  It had some gears which incrementally cranked something for a
predetermined amount of time, and when it got to the end of the 'cranking', it would
open a switch in series with the motor circuit.  It was also sensitive to the loop
current, and any Start signal (or a static burst, for that matter) would bypass that
contact which broke the motor circuit and the motor would start again.

We copied the Fleet Broadcast, (Foxtrot Romeo) from the west coast, and any time that
they ran out of traffic and didn't want to send the "RY/SG" test signals, these 
gadgets would stop the printers after a minute or two.

THESE WERE DEVICES MADE BY TELETYPE, AND EVERY MODEL 28 KSR I EVER SAW ABOARD THE
USS HANCOCK HAD ONE, including the two printers up on the Aerology deck.  The only
downside was that when the machine came back to life, you might miss a character or
two, but that startup was usually five spaces, two carriage returns and a line feed.
Only on rare occasions would you possibly miss the "FR" number, which was no big deal.
They were sequential and it was usually easy to find the prior message torn off the
machine and check the next one after the missing number for verification.

Ralph - W8ROI
RM on the USS Hancock, CVA-19, May 1959 - March 1961
(Any of this sound familiar to anyone?)

While we're at it, does anyone remember what Alpha One Alpha was?  (A1A)?


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Message: 1
Date: Wed, 11 Jul 2012 11:42:34 -0700
From: "George B. Hutchison" <w7tty at centurylink.net>
Subject: Re: [GreenKeys] ASR33 autostart
To: <greenkeys at mailman.qth.net>,	"Nico de Jong" <nico at farumdata.dk>
Message-ID: <812CA6E0701947D2AFDEA2D3E91A9243 at MAINCONSOLE>
Content-Type: text/plain;	charset="iso-8859-1"

Nico - - -

You need a box commonly used in the days of yore called an "Idle 
Line Motor Control". Pulse Com was one manufacturer that comes to 
mind, but there were many otjhers.

It simply monitors a current loop for actiivity, and after sensing 
none for a predetermined amount of time, shuts off power to the 
machine.

As soon as it senses even the slightest keying on the loop, it turns 
on the motor and keeps it running until the next idle period exceeds 
the setting programmed into it, and poof, it shuts the motor off 
again.

I have two or three of them around here somewhere, and it's almost a 
certainty that collectors of "stuff" like Jack Hart or Don House 
probably have some sequestered somewhere in their massive piles of 
"Stuff".

I'll look around here today.

W7TTY




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