Never mind door chains this aspect of human behaviour seems to be becoming a
problem. I have fitted a large box with a large button on it which is the
front end of my door phone. People complained before they could not see I
had a bell and knocked. Nobody can miss this one, but they still knock. The
big problem with these cordless intercoms is you cannot open the
conversation from inside since the bell button has to be pressed to turn on
the outside tx/rx part to save batteries.
I did have an old wired one but that did at least work both ways until some
herbert bashed the bell so hard it broke off inside the speaker box.
My current idea is to resurect the old system but just have it as an
intercom controlled from inside to sort out the knocking brigade. I have a
nice little horn speaker I might fit over the door. It will need a capacitor
in series with it though since the bell part of this old intercom is
operated by shorting out the intercom wire.. I don't want two bells in any
case the cordless one is for summer incase i get some time to go into my
garden!
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Mr Pounder Esquire" wrote in message
news
Last night at about 9PM in the dark there was a knock at the front door.
People never seem to see the door bell.
It was this dairy guy asking me if I'd like him to deliver milk. I
politely asked him if he could tell the time, he said "Sorry" and cleared
off.
If this had been 5 or 6 VERY big lads intent on no good I could have been
in trouble, even though I'm a big guy.

Question is:
Are these door chains that can be screwed into PVC doors and frames any
good?
I can't see the screws holding out against a good kick.

Thanks