Slide cassette for sound slide projector - has moving coils in hole in housing with auxiliary windows with upright ribs

摘要

The slide cassette for sound slide projector with two moving coils is mounted in a housing and attached to a magnetic tape. The housing forms a hole linking the window in the lower and upper walls. The coils can rotate freely in a hole in the housing. The side walls of the housing has an opening so that the moving tape can be scanned by a head. There is also an auxiliary edges of the auxiliary window has four upright ribs covering the complete circumference of the auxiliary window. The auxiliary window has a relief on at least one side which matches up with a relief on the inside of the hole in the housing.