Self-contained projector and screen unit
Abstract
Abstract A SELF-CONTAINED PROJECTOR AND SCREEN UNIT COMPRISING, IN PREFERRED FORM, (A) A HOUSING MOUNTING A TRANSLUCENT SCREEN ON ONE SIDE THEREOF, (B) A FILM STRIP HAVING A SERIES OF IMAGE CARRYING FRAMES ENCLOSED WITHIN THE HOUSING, (C) A PROJECTION SYSTEM, INCLUDING A LENS AND A LIGHT SOURCE, POSITIONED INSIDE OF THE HOUSING AND ADAPTED TO PROJECT THE FILM STRIP''S FRAME ONTO THE SCREEN, (D) A SWITCH FOR SELECTIVELY ACTUATING THE LIGHT SOURCE, (E) FRAME SEQUENCING APPARATUS FOR SELECTIVELY MOVING FILM FRAMES ONE AT A TIME IN SEQUENCE THROUGH THE PROJECTION SYSTEM, AND (F) A PULL CORD RELATING THE FRAME SEQUENCING APPARATUS TO THE SWITCH AND EXTENDING OUTSIDE OF THE HOUSING. AS THE CORD IS REPEATEDLY PULLED BY A CHILD THE FILM STRIP FRAMES ARE SEQUENTIALLY PRESENTED ONE AT AT IME TO THE PROJECTION SYSTEM, ALSO, THE LIGHT SOURCE IS TURN ON ONLY WHEN THE CORD IS PULLED. THUS, THE UNIT OPERATES TO PROJECT A DIFFERENT IMAGE ONTO THE SCREEN FROM THE FILM STRIP EACH TIME AND ONLY WHEN THE CORD IS PULLED.
Inventors
- 👤 John F Mayer
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |