In 1772 this problem was overcome when a Scottish millwright replaced the sails with shutters that automatically opened and closed, somewhat resembling venetian blinds.
Sellest probleemist saadi jagu 1772. aastal, kui üks šoti veskimeister asendas purjed automaatselt avanevate ja sulguvate luukidega, mis meenutasid mingil määral ribakardinaid.