Optical Measurement Sampling of Relay Contact Erosion


Lowrey, Ernest R.   (1959, ASQC)   Illinois Bell Telephone Company

Industrial Quality Control    Vol. 16    No. 2
QICID: 4401    August 1959    pp. 5-10
List $10.00
Member $5.00

This article is not available online. Contact us to receive a scan of the archive, in PDF format.

Article Abstract

This article describes an optical means used to solve the contact erosion problem encountered in the maintenance of 50,000 to 400,000 relays employed in a modern dial telephone central office. Each relay has an average of five sets of contacts. Some relays perform up to 25 million operations a year.


Measurement and control

Browse QIC Articles Chronologically:     Previous Article     Next Article

New Search

Featured advertisers

ASQ is a global community of people passionate about quality, who use the tools, their ideas and expertise to make our world work better. ASQ: The Global Voice of Quality.