A bit of projection clock history

Projection clocks were first invented in the early 1900's and were known then as “Ceiling Clocks” for the fact they projected an image of the old-fashioned clock dial and hands onto a ceiling. A patent was filed in the United States in 1940 regarding a method of projecting an enlarged image of the clock hands and numerals onto a ceiling or wall. Since that time, modern technology has allowed projection clocks to a convert to digital status.