公开(公告)号：US3669531A

公开(公告)日：1972-06-13

申请号：US3669531D

申请日：1970-04-06

Applicant: DONALD A YOUNGBLOOD

Inventor： YOUNGBLOOD DONALD A

IPC: G03B21/32 ,  G03B31/06 ,  G03B31/00

CPC classification number: G03B31/06 ,  G03B21/323

Abstract: AN AUDIO-VISUAL CARTRIDGE CONTAINING A REMOVABLE FILMHOLDER HAVING AN ENDLESS FILMSTRIP MOUNTED THEREON AND A REMOVABLE MAGAZINE CONTAINING AN ENDLESS AUDIO TAPE MOUNTED THEREIN. THE CARTRIDGE HAS, ADJACENT THE OPENING OF ITS COMPARTMENT WHICH RECEIVES THE FILHOLDER, A WINDOW OR FRAMING APERTURE AGAINST WHICH THE FILMSTRIP MOVES, ADJACENT THE WINDOW ARE A PAIR OF SLOTS FOR RECEIVING THE FILM STRIP DRIVE SPROCKETS. THE FILMHOLDER ALSO CONTAINS AN ANGULARLY-MOUNTED MIRROR FOR DIRECTING THE PROJECTION LIGHT BEAM THROUGH THE PORTION OF THE FILMSTRIP ADJACENT THE WINDOW. THE CARTRIDGE ALSO HAS, ADJACENT THE OPENING OF ITS COMPARTMENT WHICH RECEIVES THE MAGA-

ZINE, OPENINGS FOR PROVIDING ACCESS TO THE AUDIO TAPE FOR MOVING SAME FROM A PROJECTED TO AN OPERATIVE POSITION VIA ALIGNED OPENINGS IN THE MAGAZINE.

公开(公告)号：US3695746A

公开(公告)日：1972-10-03

申请号：US3695746D

申请日：1970-04-06

Applicant: DONALD A YOUNGBLOOD

Inventor： YOUNGBLOOD DONALD A

IPC: G03B21/30 ,  G03B31/06 ,  G09B5/06 ,  G03B21/58

CPC classification number: G09B5/067 ,  G03B21/30 ,  G03B31/06

Abstract: A collapsible screen assembly for a self-contained audio-visual apparatus comprising a forward wall having a translucent screen, a pair of foldable, spring-loaded side walls securing said forward wall to opposite sides of a projection opening in a front wall of the apparatus, and a hood pivotably secured to said front wall above said side walls so as to enclose said forward and side walls when folded and provide a light shield above said forward and side walls when the latter are opened. One side wall can be detached from said front wall and secured to the other side of said projection opening, thereby to provide a front screen projector. The assembly includes various brackets, locating posts, and other members, for facilitating operation, locking, and alignment of the screen assembly.