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Re: History--did relay logic (e.g. crossbar switch) need air conditioning?

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On 2015-12-08, hancock4@bbs.cpcn.com <hancock4@bbs.cpcn.com> wrote:

> I think the old methods had merit until modern refrigerants came 
> along.  Before Freon, I think they had to use noxious chemicals 
> (ammonia?) in machine refrigeration.

Ironically, Freon is now considered a noxious chemical as well.

> I don't know the technology, but steam and natural gas can somehow
> be used to create cooling.  In the 1960s, I remember the gas works 
> pushing people to get gas air conditioners.

Propane fridges were popular for trailers and RVs (and might still
be for all I know).  I still find this paradoxical.

> In the 1960s, apparently the price of a window a/c unit came 
> down enough that lots of people and small stores got them.  
> But often house wiring had to be upgraded 'cause those things 
> used a lot of power.

And that became a whole new problem...

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History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-04 19:44 -0800
  Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Quadibloc <jsavard@ecn.ab.ca> - 2015-12-04 22:19 -0800
  Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Jon Elson <elson@pico-systems.com> - 2015-12-05 13:27 -0600
  Re: History--did relay logic (e.g. crossbar switch) need air conditioning? jhhaynes@earthlink.net - 2015-12-07 13:41 -0800
    Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-07 17:58 -0800
      Re: History--did relay logic (e.g. crossbar switch) need air conditioning? JimP <solosam90@gmail.com> - 2015-12-07 21:31 -0600
        Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Dave Garland <dave.garland@wizinfo.com> - 2015-12-07 23:27 -0600
          Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-07 22:12 -0800
            Re: History--did relay logic (e.g. crossbar switch) need air conditioning? "Osmium" <r124c4u102@comcast.net> - 2015-12-08 07:24 -0600
              Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Ahem A Rivet's Shot <steveo@eircom.net> - 2015-12-08 14:01 +0000
            Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-08 20:21 +0000
              Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-08 12:40 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Lawrence Statton <lawrence@senguio.mx> - 2015-12-08 15:31 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-09 01:04 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Dave Garland <dave.garland@wizinfo.com> - 2015-12-08 21:23 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Joy Beeson <jbeeson@invalid.net.invalid> - 2015-12-08 22:40 -0400
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Dave Garland <dave.garland@wizinfo.com> - 2015-12-09 00:46 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Andrew Swallow <am.swallow@btinternet.com> - 2015-12-09 07:04 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Ahem A Rivet's Shot <steveo@eircom.net> - 2015-12-09 09:15 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-09 18:27 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? "Ranger" <r5432@gmail.com> - 2015-12-10 15:39 +1100
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-12-10 15:35 +1100
              Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Andrew Swallow <am.swallow@btinternet.com> - 2015-12-09 06:59 +0000
              Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Bernd Felsche <berfel@innovative.iinet.net.au> - 2015-12-09 23:47 +0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Ahem A Rivet's Shot <steveo@eircom.net> - 2015-12-09 17:20 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Michael LeVine <mlevinespmfltr@redshift.com> - 2015-12-09 10:14 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-09 10:21 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-09 18:47 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Morten Reistad <first@last.name.invalid> - 2015-12-09 21:33 +0100
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Jon Elson <jmelson@wustl.edu> - 2015-12-11 16:56 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-09 18:27 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? mausg@mail.com - 2015-12-09 20:47 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? "Osmium" <r124c4u102@comcast.net> - 2015-12-09 17:01 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? mausg@mail.com - 2015-12-10 10:48 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Bernd Felsche <berfel@innovative.iinet.net.au> - 2015-12-10 10:52 +0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? scott@slp53.sl.home (Scott Lurndal) - 2015-12-10 14:15 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Anne & Lynn Wheeler <lynn@garlic.com> - 2015-12-10 10:02 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-10 10:17 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? hancock4@bbs.cpcn.com - 2015-12-09 13:10 -0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Bernd Felsche <berfel@innovative.iinet.net.au> - 2015-12-10 11:22 +0800
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? mausg@mail.com - 2015-12-10 10:53 +0000
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? JimP <solosam90@gmail.com> - 2015-12-10 17:54 -0600
                Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Lawrence Statton <lawrence@senguio.mx> - 2015-12-09 17:17 -0600
          Re: History--did relay logic (e.g. crossbar switch) need air conditioning? JimP <solosam90@gmail.com> - 2015-12-08 10:03 -0600
            Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-12-08 20:21 +0000
              Re: History--did relay logic (e.g. crossbar switch) need air conditioning? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-01-02 15:32 -0500
      Re: History--did relay logic (e.g. crossbar switch) need air conditioning? Lon <lon.stowell@comcast.net> - 2015-12-13 12:58 -0700

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