http://meta-studies.net/EMG/JF/DaveyRollright.JPG

The Davey "Rollright" thorn needle sharpener was sold by the EMG company to enable thorn needles to be resharpened to a perfect point.  The rotating edge of the gramophone turntable was used to power the Rollright and only 3 seconds of use is sufficient to sharpen a thorn needle to a perfect point.  The instructions which accompanied a Rollright are shown below.[^Thanks to Chunny for providing an image of these instructions.^]

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!!!Davey Rollright Instruction leaflet

http://meta-studies.net/EMG/JF/RollrightLeaflet.jpg

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