1869 Mar. 172/2 A plaster-of-Paris cast is placed on a disc which a handle-turning ‘jigger-boy’ causes to revolve.
1921 (1927) §043 Jigger, jigger boy, jiggerer..attaches or detaches tubs, singly or in pairs, to or from endless rope, by placing rope in fork of ‘jigger’, or double crook, in socket at one side or end of tubs.