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Zither switch with open-wire multiple and two-motion ratchet drive, 1894
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Zither switch with open-wire multiple and two-motion ratchet drive, 1894, result 1 of 1

Item Details
Open Artstor
Available to everyone
Title
Zither switch with open-wire multiple and two-motion ratchet drive, 1894
Zither switch with open-wire multiple and two-motion ratchet
Work Type
Telecommunications
Date
1894
Location
Indiana
Material
metal (unknown); wood (unidentified)
Measurements
overall: 550 mm x 450 mm x 240 mm, 22kg
Description
Zither switch with open-wire multiple and two-motion ratchet drive, made by the Strowger Automatic Telephone Company, Indiana, United States, 1894.; Zither switch with open-wire multiple and two-motion ratchet drive, made by the Strowger Automatic Telephone Company, Indiana, United States, 1894.; This automatic selector switch was first used in the LaPorte (Indiana, USA) telephone exchange in autumn 1894. It used piano wire and a contact arm that could move in two directions to select the chosen wire. It was the first switch to use the basic mechanism that would be used in later step-by-step switches at telephone exchanges, and was proposed by the brothers John and Charles Ericsson. Its layout gave rise to the nickname 'zither' switch. The design was only used for a short time before it was replaced by the more familiar step-by-step switch.
Repository
Science Museum, Information Age Gallery: Exchange
Donated by Plessey Telecommunications
ID Number
co33504
Source
Image and original data from Science Museum Group - https://collection.sciencemuseum.org.uk
Rights
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license - https://creativecommons.org/licenses/by/4.0/. All other source metadata is released under Creative Commons Zero - https://creativecommons.org/publicdomain/zero/1.0/. The image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License - https://creativecommons.org/licenses/by-nc-sa/4.0/.
File Properties
File Name
large_1970_0543__0005_.jpg
SSID
26292011

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