Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Thank you for visiting RF Cafe!
Innovative Power Products Couplers

Bell Telephone Laboratories Advertisement
October 1953 Radio & Television News Article

October 1953 Radio & Television News
October 1953 Radio & Television News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919 - 1959. All copyrights hereby acknowledged.

If you believe this 1953 advertisement in Radio & Television News magazine, engineering at Bell Telephone Laboratories invented the wire-wrapping process. A little additional research shows that indeed it was a Bell Telephone engineering team led by Arthur Keller who developed the method and a wire-wrap tool to do the job. Field technician needed a fast, durable, and reliable electrical connection when making hundreds or thousands of splices at relay stations and while up on telephone poles. The key to making a good wire-wrap connection is sharp corners on the wrapping post so that the corner pushes through any oxidation or contaminant on the bare wire. NASA and the Department of Defense (DoD) have exacting workmanship standards to guarantee a rugged, durable electrical connection with low resistance, and imperviousness to contamination. In fact, properly formed wire-wrap connections are considered to be gas-tight. See NASA's "Discrete Wiring Solderless Wrapped Electrical Connections - Wire-Wrap" for more information

Bell Telephone Laboratories Advertisement

Bell Telephone Laboratories, October 1953 Radio & Television News - RF CafeA New Twist in Telephony

A solderless connection, enlarged 15 times. Connections are more uniform than soldered ones and only half as bulky.

For years the accepted way to connect wires to telephone apparatus was with solder. Now, Bell Laboratories engineers have discovered how to make connections faster and better - without solder.

Solder, they reasoned, wouldn't be needed if wire and terminal could be kept tightly pressed together. But, for economy, this had to be done with the wire alone - without complicating screws and springs.

They found the answer in using a properly dimensioned terminal with sharp edges ... whipping the wire around it under high tension. The terminal bites into the wire, locking it securely into position. Thereafter the squeezed edges maintain a contact pressure of at least 15,000 pounds per square inch - even under vibration that cracks soldered joints.

The new connections can be made in half the time - a big money-saver in the billion connections that Western Electric makes each year for the Bell System. It's another example of the way Bell Telephone Laboratories works continually to keep costs low.

 

Bell Telephone Laboratories

Improving Telephone Service for America Provides Careers for Creative Men in Mechanical Engineering

Cross section of solderless connection. Note terminal biting into wire. In a six-turn connection there are at least 20 clean contact areas impervious to moisture and corrosive gases, offering current a low resistance path.

Power tool whips wire on terminal in fraction of a second. There is no heat which could damage miniature components ... no dropped solder or wire clippings to cause trouble later.

 

 

Posted January 24, 2019

RF Cascade Workbook 2018 by RF Cafe Power Supplies (Rohde & Schwarz) - RF Cafe
Res-Net Microwave - RF Cafe Axiom Test Equipment - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com

spacer