TELEPHONE SA 4284
This is a Telephone No. 746 modified as a Teleprax telephone.

The telephone has an DC buzzer installed and a plug ended cord..

The Teleprax consists of two telephones, connected as per diagram SA 4284, to a Battery Box D93265 which includes two Jacks No. 84A, a Jack No. 99, two capacitors and a 6 volt battery.

Available in the colours:-
 Blue, Green, Red, Yellow and Grey.

A Telephone SA 4284 included:-
1 x Telephone No. 746F (Colour) Modified.
1 x Cord, Instrument No. 4/97 AD 180", Grey with Plug No. 420.
 1 x Buzzer No. 32A- 3.
1 x Special Label, available from THQ/MkD/Mk3.1.3, Education Service.

Introduced circa 1972.

Circuit diagram - SA 4284.

Drawings for Battery box - 93265 and 93270.

Specification - S1177 and S4824.

Telephone SA 4284

Model Mark BlackGreyIvoryRedYellowGreenBlueBrown IntroducedRemarks
Telephone SA4284 Mk 1  y  yy yy  11/72Teleprax working

 

Teleprax

On Tuesday, December 8, 1970, the name TELEPRAX was registered as a trademark.  Application number UK00000968774.

The Trademark definition was - Teaching and instructional apparatus and instruments and teaching machines.

BT claimed ownership but the current status for this trademark is defined as "dead" as from 2005.


 

 
 
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Last revised: February 26, 2023

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