Simple and clever window stay

[N_Cook]

Well I've never seen this design before

A house on Main Road, Hursley, Hampshire. Combined limiter and fully variable quasi-stay with positive latch option for maximum opening, requiring delatching by hand. Considering a near neighbour has to replace a broken window pane from a gust of wind delatching by jolt, the standard multi-holed arm , window stay. Not so far managed to google-image this design for other examples/name etc

[N_Cook]

The nearest I've found is

and that has no variable holding angle option , just a weighted bob for the limit posistion , that the wind could delatch easily I'd have thought

[Peter Parry]

More on them here

(page 199)

and here

(Page

14)

Pre rotted ones for sale

[N_Cook]

I'd got quadrant and arm with "window stay" but "sprung" was the missing search term.