What's this

[handyjack]

Painting an old pup and found this, what was it for? And why the lead seal?


View media item 93699

 

[Taylortwocities]

Gents have millions of clocks all over the place. they also made alarms and electric bells and other stuff.

Hard to tell exactly what it is without seeing the wiring attached, even then…




PS Are the RSPCA aware of you abusing that elderly dog?

 

[RF Lighting]

It's an old mains fire alarm heat detector.

 

[handyjack]

Gents have millions of clocks all over the place. they also made alarms and electric bells and other stuff.

Hard to tell exactly what it is without seeing the wiring attached, even then…




PS Are the RSPCA aware of you abusing that elderly dog?

No pups were harmed during decorating, honest guv.

 

[Taylortwocities]

Just found it, well done RF!!!

The 150° was the giveaway.


Lots of archive stuff (including a mention of the 1151) at http://www.kibworth.org/memories of gents 1.pdf

 

[RF Lighting]

I seem to remember they work by a bi-metallic strip causing a little hinged piece to swing down from the detector when it operates.

There is a small bulb containing mercury on the back of the hinged part which makes the circuit and sounds the alarm.

 

[Adam_151]

It's an old mains fire alarm heat detector.

Part of an old three wire system thats in desperate need of upgrading then! Must admit i've never seen a heat for one before, normally manual call points only

Saw an ingenious modification to add smokes in an archive room to a 3 wire 240v factory system once though... domestic detectors and a relay base

 

[JohnW2]

I seem to remember they work by a bi-metallic strip causing a little hinged piece to swing down from the detector when it operates.

There's nothing wrong with 'tried and tested' technology

Kind Regards, John

 

[RF Lighting]

I've only ever seen one in the flesh in a school boiler room, which has since been upgraded to a monitored fire alarm.