Vibroplex Telegraph Key

Description (Brief)
Semi-automatic keys like this "Vibroplex" automatically produced rapid morse code dots by using a weighted pendulum to quickly make and break contact in the electrical circuit. The operator would make the dashes manually but could send much faster than with an ordinary key. This key was used by a Western Union operator and came to the company's museum with its original carrying case.
Currently not on view
Object Name
sending key
telegraph key
date made
ca 1919
Vibroplex Company, Inc.
Physical Description
metal (overall material)
plastic (overall material)
slate (overall material)
cloth (overall material)
rubber (overall material)
key: 9 cm x 9 cm x 20 cm; 3 9/16 in x 3 9/16 in x 7 7/8 in
box: 12 cm x 11 cm x 23.5 cm; 4 3/4 in x 4 5/16 in x 9 1/4 in
ID Number
accession number
catalog number
Telegraph Keys
See more items in
Work and Industry: Electricity
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
from Homer E. Johnson
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.