4 ms·
It's totally possible to shape a bimetallic strip in a way that makes it bistable, thus clicking between the two states, just like an electrical switch which us
by frabert 3y ago
It's totally possible to shape a bimetallic strip in a way that makes it bistable, thus clicking between the two states, just like an electrical switch which uses springs inside which are normally not noisy either.
- HeyLaughingBoy 3y agoThis is actually the only type that I've ever seen.
- bagels 3y agoThey used to use a coiled strip with a mercury switch on the end of it.
- HeyLaughingBoy 3y agoRight!!! In the old thermostats. I forgot about those.
- aidenn0 3y agoOne construction I've seen is with a permanent magnet for hysteresis; the strip jumps to the magnet when it gets close, and then requires extra tension to release. The thermostat in my first apartment worked this way (and it looked to me like the strip was actually carrying the current to operate the gas heater; presumably a NC valve).
- quickthrowman 3y agoIndeed, this is how (non semi-conductor) motor overload relays (aka ‘heaters’) work, a simple bimetallic strip with two states. https://www.c3controls.com/white-paper/what-is-overload-protection/ https://www.c3controls.com/white-paper/what-is-overload-prot...