Key switch
A key switch (sometimes called a keyswitch or lock switch) is a key-operated switch. Key switches are used in situations where access to the switch's functions needs to be restricted. Key switches are available as components with solder connections, and are available with a variety of ampere ratings. They may use tubular or other specially-shaped keys for extra security. Key switches have been used for a variety of purposes, up to and including the launch of nuclear missiles. In less secure applications such as corridor and restroom lighting controls in public buildings, tamper-resistant switches with a simpler key mechanism may be used instead.
 On/off key switch | |
| Working principle | Switch |
|---|---|
| Electronic symbol | |
.svg) | |
A key switch (sometimes called a keyswitch or lock switch) is a key-operated switch.[1] Key switches are used in situations where access to the switch's functions needs to be restricted.[2][3]
Key switches are available as components with solder connections, and are available with a variety of ampere ratings. They may use tubular or other specially-shaped keys for extra security.[4]
Key switches have been used for a variety of purposes, up to and including the launch of nuclear missiles.[5]
In less secure applications such as corridor and restroom lighting controls in public buildings, tamper-resistant switches with a simpler key mechanism may be used instead.[6][7]
References
[edit]
- ^ Martston, R. M. (1998-07-15). Security Electronics Circuits Manual. Newnes. ISBN 978-0-08-093854-7.
- ^ Safety), Center for Chemical Process (2017-01-06). Guidelines for Safe Automation of Chemical Processes. John Wiley & Sons. ISBN 978-1-119-35189-4.
- ^ Schum, John L. (1988). Electronic Locking Devices. Butterworths. ISBN 978-0-409-90125-2.
- ^ "Key switches". Maplin Electronics. Retrieved 23 August 2014.
- ^ "Simulation of a Peacekeeper missile launch". Defence Imagery. Archived from the original on 28 September 2015. Retrieved 23 August 2014.
- ^ "Low-Cost Security Measures for School Facilities" (PDF). National Clearinghouse for Educational Facilities. Archived from the original (PDF) on 25 May 2012. Retrieved 1 September 2014.
- ^ "Product Bulletin for 30 Amp AC Toggle Switches". Leviton. Archived from the original on 6 April 2023. Retrieved 1 September 2014.
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