[VoIP] Fundamentals of Antique Strowger

[Steph Kerman]

Mark (and others),

Here are a couple of messages that didn't make it here and are very worthy of cross-posting.  I think they are for the most part self-explanatory.

At the time this book was published, Keith "plunger" lineswitches and rotary lineswitches (what are referred to as Subscriber Uniselectors in BPO parlance) were all that existed.  The 2-motion 
Linefinder was about to be introduced.  From the viewpoint of North American practice this is a major area not covered since LFs were very widely used here, much more widely than in the UK it seems. 
However these books are very worthwhile despite that for the breadth of coverage and the view they give of the early days.  And you can't beat the price!

IMO Jim deserves many thanks from the wannabe electro-mechanical switcher community for the effort he put into this.  He is not on this list AFAIK but his address is in the CC.

(More comments at the bottom)

Jim Burnham wrote:
> I've scanned and posted for download the first half of Smith & 
> Campbells' Automatic Telephony, 1921 edition. It's about 60mb and can 
> be had from -
>
> www.aircraftmanuals.us/phone/automatic-telephony.pdf
>
> The second half will be posted by Sunday evening or so. There are no 
> restrictions on this - it's available for all. Index it, OCR it, sell 
> it, give it away, it matters not to me. It makes fun gifts for the 
> whole family.
Jim Burnham wrote:
> I've scanned and posted for download the second half of Smith & 
> Campbell's Automatic Telephony, 1921 edition.
>
> It's about 68mb and can be downloaded from -
>
> www.aircraftmanuals.us/phone/automatic-telephony-2.pdf
>
>
> The first half is still available at -
>
> www.aircraftmanuals.us/phone/automatic-telephony.pdf
>
> Dialup users - download at your own peril. The total size will be 
> around 125MB
>
>
> Enjoy.
>
> Jim Burnham

In reply, someone pointed out that Google also scanned the book and that
their entire volume was only about 11 MB instead of 2 x 68 MB.  That's
because the scan quality is much much lower.  A discussion about quality
ensued as a result of that comment.

I downloaded both forms of it so I have it for purposes of future
extracting purposes.  I own a copy of the book.

Steph