PERPETUAL CALENDAR Russian patent published in 1994 - IPC

FIELD: perpetual calendars. SUBSTANCE: calendar has information carriers arranged in aligned relationship rotatably to each other. One of the carriers is made in the form of a cylinder and has a scale of moth numbers in the form of seven groups of numbers. The other one for pointing to a week days is made in the form of a ring. The cylinder is provided with circular thrust protrusion for holding the ring interposed between the rows of moth numbers. The ring surface is provided with a code information in the form of twenty one marks of seven colors corresponding to the week days. The marks are divided into seven groups, three marks in each group according to three months of a season. The cylinder has season marks applied onto its surface for adjusting the ring in response to. EFFECT: enhanced convenience. 7 dwg