Aii almost human servant of men in charge of power plants is a now valve which go.-rns the How of steam into large turbines in response to spoken must bo operated over a tclonhnno. When the despal.clicr says, “ Open,” “ Close,” or “ Stop,” the valve obeys In’s voice. The voice actuates a sot of electric relays, through which the electric motor that turns the valve is controlled.
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https://paperspast.natlib.govt.nz/newspapers/ESD19310428.2.94
Bibliographic details
Evening Star, Issue 20778, 28 April 1931, Page 11
Word Count
66Untitled Evening Star, Issue 20778, 28 April 1931, Page 11
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