US3865475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture viewer with sound system
Assignee: Individual
•
Filing: 1973-06-28
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Granted: 1975-02-11
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Expires: 1993-06-28
Abstract
Abstract An adaptor, in the form of a modular base section, is provided for adding a major portion of a sound recording and reproduction system to a motion picture viewer. The adaptor base section mounting components, including a loudspeaker, of the sound system is adapted to be coupled to a main housing section of the viewer in place of a non-sound or standard base section. The components mounted in the adapter base section are advantageously arranged according to height so as not to intrude into an internal optical path within the viewer.
Inventors
- 👤 Herbert L Hardy
- 👤 Jr Joseph E Murray
- 👤 William R Wray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:04
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
369 words
A motion picture viewer system that is convertible from an image projection mode of operation to an image projection and sound reproduction mode of operation, said viewer system comprising: a main housing section formed in part by a rear projection screen and including an open bottom; projection means in said main housing section for projecting image-bearing light towards said open bottom of said main housing section; a first hollow base section locatable in closing relation with said open bottom when said viewer is operable in the image projection mode of operation, said first base section having a given length between leading and trailing ends thereof and being dimensioned so that said rear projection screen extends forwardly of said leading end of said base section by a predetermined distance, said first base section further including first means for mounting reflecting means in a predetermined spacial relationship with said projection means and said rear projection screen for reflecting the imagebearing light onto the rear of said rear projection screen; a second hollow base section loctable in closing relation with said open bottom of said main housing in place of said first base section when said viewer is operable in the image projection and sound reproduction mode of operation, said second base section being longer between leading and trailing ends thereof than the given length of said first base section such that the distance between said rear projection screen and said leading end of said second base section is smaller than the predetermined distance between said rear projection screen and said leading end of said first base section, said second base section including second means for mounting reflecting means in the same predetermined spacial relationship with said projection means and said rear projection screen as when said first base section is located in operative closing relation with said open bottom of said main housing section; and a portion of a sound system including a loud speaker mounted in said second base section, said loud speaker being positioned adjacent said leading end of said second base section and occupying a space in said second base section attributable to the greater length of said second base section as compared to said first base section.
Claim 2
Dependent Claim
369 words
A motion picture viewer system that is convertible from an image projection mode of operation to an image projection and sound reproduction mode of operation, said viewer system comprising: a main housing section formed in part by a rear projection screen and including an open bottom; projection means in said main housing section for projecting image-bearing light towards said open bottom of said main housing section; a first hollow base section locatable in closing relation with said open bottom when said viewer is operable in the image projection mode of operation, said first base section having a given length between leading and trailing ends thereof and being dimensioned so that said rear projection screen extends forwardly of said leading end of said base section by a predetermined distance, said first base section further including first means for mounting reflecting means in a predetermined spacial relationship with said projection means and said rear projection screen for reflecting the imagebearing light onto the rear of said rear projection screen; a second hollow base section loctable in closing relation with said open bottom of said main housing in place of said first base section when said viewer is operable in the image projection and sound reproduction mode of operation, said second base section being longer between leading and trailing ends thereof than the given length of said first base section such that the distance between said rear projection screen and said leading end of said second base section is smaller than the predetermined distance between said rear projection screen and said leading end of said first base section, said second base section including second means for mounting reflecting means in the same predetermined spacial relationship with said projection means and said rear projection screen as when said first base section is located in operative closing relation with said open bottom of said main housing section; and a portion of a sound system including a loud speaker mounted in said second base section, said loud speaker being positioned adjacent said leading end of said second base section and occupying a space in said second base section attributable to the greater length of said second base section as compared to said first base section.
Claim 3
Dependent Claim
186 words
A motion picture viewer system as defined in claim 1 wherein said second base section includes a bottom wall and said second mounting means is configured to mount the reflecting means over said bottom wall near said trailing end of said second base section in position to reflect the image-bearing light along an inclined optical path to the rear of said rear projection screen, said optical path being inclined upwardly from said bottom wall and being a minimum distance from said bottom wall at the reflecting means and a maximum distance greater than said minimum distance from said bottom wall at said rear projection screen, said portion of Said sound system including a plurality of electrical and electronic components of varying height, some of said components being of a height smaller than said minimum distance and other of said components being of a height between said minimum and maximum distances, said component being mounted on said bottom wall in ascending order of height between the reflecting means and the rear projection screen so that none of said plurality of components intrudes into said inclined optical path.
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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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |