Workshop comms

Standard marine practice for many a year. Could be done with a garden hose and two plastic funnels at a pinch.

Also used as an intercom on aircraft, think it was called a Gosport tube.

Large houses used a system of cord, and bells, or the electrical method of a switch , and a box with little windows, with a relay opperated flag that moved past the window, and often a bell that tinkled, a different tone for each window. A hospital I worked in used this system for it's internal communications.

Ian S C

VOX walkie talkie may be what you need

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I have not tried these products, just a quick Google brought them up.

An update - finally took advice on here and purchased a pair as per the link in my OP. Plugged one into a socket in the conservatory and the second one went up the workshop and? ..................Nothing!. Absolutely BA. The pair of devices would not communicate. Tried them both on the same circuit in the house and they both worked perfectly.

At the time of the sale the Maplin sales person assured us that they would do the job. "I will guarantee it" said he, "If it doesn't work, bring it back and I'll refund your money.

We did and he did!

Rik

> In the 'fifties some of the shops in Bedford (UK) used these. I think that instead of using tills they put the customers purchase money in the container and it whizzed off to the cashiers office

The Dan Evans department store in Barry used them up to the early 80s!

My Dad never suffered these problems when my Mum was alive. Put it like this, when she heard the 'megamouth shark' had been discovered, she claimed it was named after her ... think Mrs Weasley!

Neil