Strowger switch

part · 1891 · Electric age

Strowger’s automatic switch.

What it is made of

• Electromagnet — has part. Electromagnetic stepping mechanisms.

Principles and materials it uses

• Brass — is made of. The contacts are brass.
• Copper — is made of. The windings are copper.

Where it is used

• Telephone exchange — is part of. Automatic selectors.

Take Strowger switch apart

Open Evothings