I have a large cut glass electric lamp base with the words 'Hinks & sons patent' & 'J Holgate & Co 20 St Mary's Gate Manchester' on metal collar. It is almost certainly early 20th century given the bakelite lampfitting.
It is 40cm tall (excluding electrical fitting) & the base is 20 cm in diameter.
I have found links to Hinks oil lamp patent but nothing electrical - does anyone know more about his electrical patents?
Is J Holgate a retailer or maker?
Can anyone date it and suggest who made the glass?
Thank you
Carol
Mod: overlarge pics resized to something more user friendly