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Old 9th Mar 2017, 2:06 pm   #1
Herald1360
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Default Interesting find- ID anybody?

This device (see pics) turned up in a colleague's box of some '30s Rolls Royce bits that he needed.


We speculated about Trembler Ignition, but it doesn't really look like anything to do with that, just a DC operated buzzer of some sort.


There's no writing on it other than "Made in England".


Anyone recognize it in any more detail than that?

The muck on it looks like what might accumulate if it were mounted under the bonnet on the bulkhead somewhere.
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Old 9th Mar 2017, 2:13 pm   #2
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Default Re: Interesting find- ID anybody?

It looks very similar to this eBay item, suggesting it's a buzzer:-

http://www.ebay.ie/itm/LOS-ANGELES-R...-/371507245864
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Old 9th Mar 2017, 3:07 pm   #3
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Default Re: Interesting find- ID anybody?

Yes, it's a buzzer - similar mechanism to a bell but no gong or clapper..

ISTR in my childhood we had a bell for the front door and a buzzer for the back door so one could tell the difference between them.

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Old 9th Mar 2017, 6:05 pm   #4
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Default Re: Interesting find- ID anybody?

I've powered it- it works from about 3V and certainly makes a decent racket on 12V.


It's a lightweight compared to that railway one- base and cover are mostly 1/16" bakelite.


Anyone got any idea as to maker?
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Old 9th Mar 2017, 6:47 pm   #5
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Default Re: Interesting find- ID anybody?

Given the supposed Rolls-Royce-bits connection, could it be one of the buzzers/bells used for "Lady Penelope" sitting in the rear compartment to signal to Parker the driver up-front?

From the 1920s it was normal in limousines fitted with a fixed partition between the driver and the people-in-first-class at the rear to have an intercom of some kind - usually a telephone-type thing - and a buzzer/bell to tell Parker to pick up the phone to receive his orders.
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Old 9th Mar 2017, 7:09 pm   #6
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Default Re: Interesting find- ID anybody?

That does sound like a likely scenario.


My colleague won't be doing that, though- he's building himself a Derby Bentley based tourer with an ex military Rolls Royce B80 straight eight as its motive power source. Currently known as "Mr. Toad". I doubt you could even hear the buzzer when that gets going well
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Old 9th Mar 2017, 9:39 pm   #7
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Default Re: Interesting find- ID anybody?

My next-door neighbour as a child, a colliery electrician, used an almost identical buzzer as a doorbell. When visitors arrived, reception of Holme Moss chB2, was disrupted over half the street.

He later went 'a.c.' and replaced it with a large trembler phone extension bell driven from a 50v transformer, no interference but you could hear it over half the street.
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Old 10th Mar 2017, 12:22 am   #8
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Default Re: Interesting find- ID anybody?

The sound of one features several times in Spike Milligan's Q5 Piano Tune. Produced by George Martin, no less.

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Old 14th Mar 2017, 2:03 pm   #9
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Default Re: Interesting find- ID anybody?

That theme tune always slayed me as a kid! I always wondered what the noise was.

As for the buzzer I'd use it as a doorbell. Better than these cheesy musical cordless ones that are sold now.

Regards,Paul
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Old 14th Mar 2017, 8:36 pm   #10
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Default Re: Interesting find- ID anybody?

It's a buzzer from an old lorry. It gives audible warning when the brake air pressure is low. I have one in my Atkinson lorry. Many were manufactured by GENTS. John.
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Old 15th Mar 2017, 12:35 am   #11
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Default Re: Interesting find- ID anybody?

I like the sound of that!

Maybe it should go into one of the "world's fastest lorries"
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Old 15th Mar 2017, 11:33 am   #12
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Default Re: Interesting find- ID anybody?

One certainty ,it will not go o/c with those windings.
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Old 15th Mar 2017, 1:25 pm   #13
Herald1360
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Default Re: Interesting find- ID anybody?

Actually, it looks like it could end up as the flasher audible warning device in a '70s Citroen DS. One of said colleague's other modes of transport.
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