AE 3 Slot Payphone Basics

[dsk]

Payphones are fascinating, maybe especially the North American 3 slot phones. This thread shows me the need of a book about North American 3 slot phones and their technical solutions.  (Haf; you may be the writer?)
So far this thread is the best we have, and I want to say thank you all far all that information!

Please correct me if I am wrong or you disagree.

OK even the extremely rare wooden payphones are of great interest, but when it comes to rotary It looks like Gray "invented" the 3 slot pretty vandal resistant nice looking telephone with a system for recognizing the coins by sound signals.

Compared to European square boxes the 3-slotter are nicely designed, and smaller.  The validators was so well designed so they survived for decades! And even pretty early the prepay with coin return was an option. In Norway the payphones with coin return needed 2 pairs until lat 1960'ies.

dsk

[rdelius]

LPC seris sets had a cast zinc or Alimunum back board. A terminal block with bo fingers was used and an amphonal connector was used to connect the upper housing..The LPC backboard also has a slot under the terminal strip

[Payphone installer]

And the two coil relay is a Gray and worth a wad.

[dsk]

What design of the handset was the standard on the AE-3slotter in the year of???he design of the 3 slot phones are so old that the plastic handset probably are the latest.  Should it be an other on this? (An of-course not a coiled cord.)

[poplar1]

Basic design was 1912 - 1972.
Later AE had same handset as AE 80 and AE 90