[GreenKeys] eBay # 5712028690: Morkrum Wheatstone Relays

[gil smith]

Hi folks:

As Wayne pointed out, you don't see these often.  This auction is for two 
"Wheatstone Relay 1-B" units, with a Morkrum label.

I have an almost identical unit that is a "Wheatstone Relay 1-A," with a 
Morkrum-Kleinschmidt label.  The relays look the same, but the base is 
different.  It is interesting that a 1-A model would come after the MK 
merger, and a 1-B model before.  The label on mine also says 
"C.P.R.CO."  -- does anyone know what that stands for?

Does anyone have any info on these relays?  I'd guess they are polar line 
relays, but I am not certain.  The contact assembly looks much like a 255-A 
polar relay, but the contacts move over a much larger distance, so speed 
would be slower I'd guess.  It has very nice brass machining, and is a 
cool-looking unit, suitable for display.

gil


At 05:57 AM 7/28/2004, eBay Member: wb0cte wrote:
>don't see thease very often.
>wayne  wb0cte
>
>Title of item:       Morkrum RTTY Teletype Telegraphy Kleinschmidt Radio Ham
>Seller:              dsm-pgh
>Starts:              Jul-26-04 19:06:51 PDT
>Ends:                Aug-02-04 19:06:51 PDT
>Price:               Starts at $89.00
>
>To bid on the item, go to: 
>http://cgi3.ebay.com/aw-cgi/eBayISAPI.dll?RedirectEnter&partner=777701&loc=http%3A%2F%2Fcgi%2Eebay%2Ecom%2Fws%2FeBayISAPI%2Edll%3FViewItem%26item%3D5712028690%26category%3D4671%26ssPageName%3DADME%3AB%3AEF%3AUS%3A1
>
>
>Item Description:
>See photos. Thi auction is for the two Morkrum Wheatstone Relay 1-B shown. 
>I believe these were used in very early telegraphy or teletype or ticker 
>tape systems.These are precision instruments mostly made of brass. The 
>glass top flips up to reveal the indicator. Inside the vertical tube is 
>the relay mechanism as shown in one of the photos. The knob on the side 
>has a brass plate above it that says "<-- Spacing   Marking 
>-->". There are 7 connections around the wooden base, each labeled with 
>a single letter: D, D, U, U, S, T and M. These relays seem to be in 
>excellent condition but I have not tested them in any way. Note that only 
>one has the name plate which says "Wheatstone Relay 1-B Morkrum Co. 
>Chicago". The name plate is missing from the other one. But these relays 
>are identical. Untested. As-is. No reserve. USA buyer pays $12 mailing 
>cost. International buyer pays actual shipping cost. PayPal is best. 
>Otherwise personal check or money order. Check my feedb!
>ack.
>
>
>
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