Sketches and drawings of spinning windsocks Ten ink drawings and sketches on paper of spinning windsocks, some shown attached to a pole-mounted wind vane. Includes a collage of three separate drawings pasted on to the front cover of a sketch pad. The top left drawing shows a 'wind vane' attached by rope to a pole. A windsock with a rim made from ‘propellor [sic] blades’ is shown attached to the vane by means of a ‘ball and socket bearing.’ Dotted lines indicate the rotating movement of the wind sock. The top right drawing shows a ‘wind vane’ attached to a ‘fixed base’ pole by means of a ‘horizontal revolve only' and ‘counter weight.' A wind sock is shown attached to the tip of the vane. The bottom drawing shows a drawing of a wind sock with spiralling stripes. Two arrows indicate the direction of the wind. Annotated by Cripps, 'Silk with hand painted black spiral', 'Length: 10 foot. Diam: 2'6'' entrance tapering to 1 ft. at the end' [/1]. Accompanied by a detailed page of handwritten notes related to the work and its construction [/2]; sketches of a spinning windsock, each with a black spiral pattern [/3-8]; a sheet of calculations and sketches of windsocks in varying degrees of detail, annotated by Cripps, '1) Spinning wind sock, 2) (Transmitter) ... Receiver/Recibel graph.' [/9]; and a blank sheet of paper titled ‘Sock with a black spiral’ [/10]. c.1977