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