“Alarmball” Warns of Burglars (Jan, 1933)
“Alarmball” Warns of Burglars
THE “alarmball,” illustrated in accompanying photo, is a clever little device to prevent burglaries. Placed against a door or a window, its own weight pushes the three small legs down and stills a bell, which is controlled by a clock-like arrangement within the walls. The least little movement of door or window upsets device causing the legs to thrust outward, ringing the bell and warning its owner that there’s a burglar on the premises.