STERLING TELEPHONE AND ELECTRIC Co. Ltd
Sterling Interphones

STERLING "PRIMAX" SYSTEM OF AUTOMATIC INTERPHONES
(RADIAL SWITCH TYPE)
(Regd. Nos. 499,444 and 538,687)

ADVANTAGES

  • Cross talk is reduced to a minimum
  • All instruments are fitted with Self-Replacement Device.
  • When conversation is finished the act of replacing the Handset automatically disconnects the switch.
  • It is only necessary to move the Line Selector when making a call.
  • Calls may be received and answered irrespective of time position of the Line Selector.
  • It is impossible to inadvertently make contact with more than one line at a time.

ALL LOCAL BATTERIES ARE ENTIRELY DISPENSED WITH

No. U 410

Automatic Interphone, Wall Pattern (Radial Switch Type) Revolving Granular Carbon Transmitter, Induction Coil, Double Pole Watch Receiver, Call Bell, Automatic Switch Hook, "Perfecta" step-by-step Radial Line Selector, Automatic Cut-in and Cut-out Device, Ringing Key.

Metal parts are Nickel-plated and Woodwork is Solid Walnut.

Available in 5, 10, 15 or 20 lines. (Over 20 line models made to order)


Taken from the Sterling Catalogue No. 11 & 12

See also GEC K7867

 
 
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Last revised: November 06, 2022

FM2