Rotary system

7-A Machine Switching System, its formal commercial name, were transferred to Western Electric's international division in Belgium.

The Rotary system was chosen for The Hague, (the Netherlands) and New Zealand in 1913–14, but manufacture was disrupted by the German invasion of Belgium.

Dies were moved to England, then to the Hawthorne Works of Western Electric in America (manufacture resumed at Antwerp in 1920).

The system was owned by The Hague Municipality; initially only 5,000 lines were fully automatic, the rest were semi-automatic.

The Rotary semi-automatic system 7A was chosen for public experiment in October 1912 by the French Administration Postes Télégraphes Téléphones.

The first semi-automatic Rotary 7A (McBerty design) was turned on in Angers in November 1915, and the second in Marseille on 19 April 1919 (Marseille-Colbert I).

A Rotary system was installed in Auckland, New Zealand in the central city telephone exchange (WLT) in Wellesley Street in 1924.

In Auckland, New Zealand, a rotary exchange was set up as an exhibit at the Museum of Transport and Technology at Western Springs.

[8] In Budapest, Hungary, at the Museum of Telephones (Telefónia Múzeum) there is a still workable 7A1 Rotary Switching system.

In Vámosgyörk, Hungary, at the Hungarian State Railways telecommunications main body Miskolc (Magyar Államvasutak Zrt.

In Szentes, Hungary, at the Hungarian State Railways telecommunications main body Szeged (Magyar Államvasutak Zrt.

Western Electric friction drive Line Finder (No. 7001 type)
An example of a Western Electric 7A Rotary (Bird-cage) Line Finder assembly. The horizontal shaft is driven by a gear and when the Line Finder's electromagnet is energized, a flexible disc at the base of the Line Finder's brush carriage is engaged through friction to the horizontal shaft's driving disc, causing the brush carriage to rotate.