L. M. ERICSSON
TELEPHONES HB 100 & HB110

Self-selecting Intercom wall switches for combination with either galvanic or inductor telephone sets for dual lines

HB100 and HB110 (Old No.s 774 and 775)
These types are intended to be combined either with the galvanic telephone sets HC 120-200 or with the telephone sets with inductor HC 510-520.

Based on the incoming signal, the phone's bell rings regardless of which number the switcher is set to.

When the signal arrives, the switch is turned to the position marked A, after which calls can take place.

If you wish to talk to one of the other devices from one device, you set the switch to the number of the device in question and give a signal by means of a push button, resp. inductor.

These types can also be used for single lines.

The types HB 100/10 - 100/20 are equipped with external clamps for the connection; in the case of types HB 110/30 - 110/50, the cable is connected directly to the contact pins inside the device.

Made from wood of polished walnut and fitted with a reverser.

Taken from the L. M. Ericsson Telephones and Signalling Material Catalogue No. 122 (1930) - Swedish translation

Also found in the Ericsson Catalogue 7th Edition (1923)

Last revised: March 27, 2024