NATIONAL TELEPHONE COMPANY
BATTERY INTERCOMMUNICATION TELEPHONES
AUTOMATIC INTERCOMMUNICATION WALL AND TABLE SET (LEVER)
Pattern No. B540
Comprises - Hand Combination Transmitter and Receiver, Cord, Automatic Replacement Cradle, Induction Coil, Push Button, and Automatic Replacement Levers, and in the case of the Table Set, a Wall Rosette and Cord. The Wall Set is fitted with a Bell, and the Table Set with a Buzzer.
With these Sets it is only necessary when rung up to take the Hand Combination off the cradle and speak, but if desired a reply ring can be given before speaking. it is impossible to make contact with two points by mistake.
If it is so wished, conversation can be carried on with one, two, three, or more stations at the same time by pulling down the respective levers together.
After the conversation is finished the act of replacing the Hand Combination automatically disconnects the line which has been in use.
5, 10, 15, 20, 25 & 30 line models.
Was B73 in the 1903 Catalogue.
Last revised: July 07, 2020