[GreenKeys] OT!: telephone switching question

[Ken Schwieker]

Eugene,

Sound like you have a stepper relay. A Strowger switch has multiple levels 
and ten positions on each level. A really big unit. They go for big bucks 
on Ebay. There is another version of a stepper relay in which there are 
several sets of "sweeper" contacts. As one set of sweeper contacts leaves 
the top set of  the stationary contacts another enters on the bottom. No 
reset on this type but it would usually have some auxiliary contacts that 
open or close at "home" position and a pulse contact that could be used to 
reset.  Here is a link for a stepper (he may have multiple units) for $2. 
Apparently he is in Austrailia.

http://users.tpg.com.au/users/hadrecs/vintage/vintagedata03.html

Strowger switch link

http://people.deas.harvard.edu/~jones/cscie129/nu_lectures/lecture11/switching/strowger/strowger.html

Good luck on your search.

Ken S



 >Sorry for the off topic bandwidth.
In my junk box, I found a *really* neat device. I believe it is from a 
phone switching system. The unit has 2 relays and a semi-circular set of 10 
contacts with an arm that connects to an incrementing set of contacts with 
each dc pulse given to the relay. There is another relay for resetting the 
arm back to "home". Has 3 wires, one is common, one steps the relay and the 
third resets back to home.
The only designations I see on this unit are:
CRY 29982
K-105
A-22751
I am looking to to a little project that will require 10 more of these and 
an old rotary dial from a telephone. Any chance someone out there has 10 of 
these stepper relays and an old rotary dial?
Thanks and again, sorry for the bandwidth on this off topic topic
 >Eugene