Talk:Electric bell

Permanent magnet

What happens to the permanent magnet when the current passes through it

There is no permanent magnet in this mechanism. If you were to put one inside a coil, it would eperience a force pulling it in or pushing it out, depending on the polarity of the current. If the magnet is fixed inside the coil, the magnetic field will be either amplified or suppressed. --80.65.195.132 09:44, 22 February 2007 (UTC)

A question

Will the electric bell ring if it is connected to an A>C source instedd of a D.C. source? No, —Preceding unsigned comment added by 125.62.117.228 (talk) 12:46, 11 November 2008 (UTC)

Electric bells can work on AC or DC current. I think the typical electromechanical doorbell circuit (at least the ones I remember from decades ago) runs on low voltage AC from a transformer. --Chetvorno^TALK 22:08, 19 February 2011 (UTC)

Replacement

The way it reads now, it sounds as if people are unscrewing perfectly good bells to replace them with squeakers. Not the case. Federal Signal and others still sell lots of electromechanical bells, and your local hardware store has a wall full of electromechanical doorbells (as well as fake Winchester chimes, etc.). --Wtshymanski (talk) 22:56, 18 February 2011 (UTC)

My local stockist has electric bells at £30 and louder electronic squeakers at £20. Guess which is selling? Working bells might not be getting removed, but new ones aren;t going in, in favour of electronic ones. When did you last see a phone with an electromechanical bell? Andy Dingley (talk) 23:06, 18 February 2011 (UTC)

I saw a phone with an electromechanical bell just last night, as a matter of fact...but phone bells don't have breaker points in them. --Wtshymanski (talk) 03:30, 19 February 2011 (UTC)

An old phone in use, or a new phone with a real bell? We didn't get widespread touch-tone in the UK until bells were starting to go, so we replaced nearly every existing dial phone around 1990, losing bells with them. Installed US phones are thus often older than UK. Of the few bell-equipped phones still here, more are the really old black Bakelite 300 series as retro decorators, than the previously ubiquitous brown & grey 746. In both countries though, I'd be surprised to see new phones with bells.

Phones are AC bells with polarised magnets, so don't require breaker points. These are still "electric bells" though, within the scope of this article. You can find just the same bell mechanism in small door bells too (ours are often powered by low voltage AC transformers). Andy Dingley (talk) 11:47, 19 February 2011 (UTC)

When the Phone Company owned the handsets, they were built to last, since the Phone Company lost money if they had to repair or replace the set. Now that we have to buy phones from Canadian Tire or Wal Mart, I speculate the average service life of a telephone has gone down to a couple of years. Nasty Taiwanese electrolytics dry out and fail, underrated semiconductors fry, but a a good solid bit of copper and iron can last for generations. My brand new doorbell is also an electromechanical chime, though, again, without breaker points. I'd have thought 50 Hz was still too fast for a "trembler"-type bell mechanism. --Wtshymanski (talk) 14:29, 19 February 2011 (UTC)

Where I live, most houses have wireless doorbells that simulate the sound of gongs playing tunes like "Westminster quarters" using synthesizers. Cell phones, cordless phones, computers, and appliances like washers and dryers that produce "alerting" sounds to indicate when they need human attention do not use electromechanical bells or buzzers, but solid state electronics. I think the point is that before microelectronics became available if you wanted to create an "alerting" sound electrically, the only choice was an electromechanical bell or buzzer. Now there are many other choices, and electromechanical noisemakers are becoming a niche market. --Chetvorno^TALK 20:00, 19 February 2011 (UTC)

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