Anyone know what this is....

[Baddegg]

Changed a light for a customer and whilst I’m there she asks me what this is on the wall.....

 

[bill01803]

Its a buzzer

 

[James]

Looks like part of an old door bell.

 

[Pete999]

A Buzzer or a Bell ( could be a Trembler)

 

[static zap]

Need a different angle to see air gap = missing parts ?

(Like buzzer so far)=@bill01803

..or missing striker for bell
-But no centre mount for single dome !

 

[Lucien Nunes]

Friedland D182 Mini Buzzer, minus its cover

 

[telectrix]

whre does the cable come from and does it have any volts on it?

 

[snowhead]

Looks like an intercom phone next to it, is it in a block of flats / appartments/ properties?

 

[freddo]

Perhaps the ringer in the entry phone died and this was added as a replacement?

 

[littlespark]

Genetically known as a “ding-dong”
But without the dome, sounds more like a tick tock

 

[Lucien Nunes]

The solenoid is upright therefore it's a buzzer not a bell. An underdome doorbell has the solenoid pointing sideways with the striker at one end and the interrupter at the other. A 'ding-dong' doorbell has a chime bar at each end of the solenoid.

I had one of these when I was a child. I can't remember what I was doing with it but my parents noticed it was causing radio interference even though they couldn't hear the buzzer itself. Dad suggested that I should find out how to suppress the interference, so I researched the subject and fitted a capacitor and a resistor (snubber) which made a useful improvement. He could have just told me to stop using it, but that's not his style.

 

[telectrix]

it's a vital component of buzz's warp drive and he'll be coming to get ya with his laser sight ray gun.

 

[littlespark]

I stand corrected. Not a Ding-dong, more of a ding-aling-aling.

just don’t play with a dingaling?

 

[Baddegg]

Apologies for the delay chaps and thanks for the replies...yes it’s next to an intercom in a flat it had an old deodorant lid covering it, didn’t have time to do anymore than take a pic, I have to go back as there is a problem withe intercom in that only one end can hear the other...

 

[freddo]

Check the wiring and also check the handset switch contacts as these are often unplated brass and tarnish in many cheap entry systems.