Post Office Bridge

Title

Post Office Bridge

Description

This is a Wheatstone bridge designed to locate a short circuit in a telephone or telegraph line by measuring the resistance to the short. It gets the name "post office bridge" from its adoption by the British Post Office, which operated telegraph and telephone systems in addition to delivering mail. The upper row of plugs determine a ratio and the lower rows are a standard resistance.

Identifier

em_007

Collection

Electricity_and_Magnetism

Subject

Bridges

Creator

Leeds and Northrup Co.

Source

Display Case H1