Patent US3944734A successfully refreshed from Google Patents.
US3944734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video projecting system
Assignee: Sony Corp
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Filing: 1974-12-23
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Granted: 1976-03-16
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Expires: 1994-12-23
Abstract
Abstract A video projecting system having a cabinet with one end being opened, a screen in the cabinet and its upper portion, a movable side board attached to the cabinet at the lower side of its opening, and a projector and a mirror both attached to the movable side board on its inner surface, in which when the movable side board is drawn out a picture from the projector is reflected on the mirror and then projected onto the screen.
Inventors
- 👤 Yoshio Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:57
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
A video projecting apparatus comprising an upright cabinet having an opening at the front thereof; a screen mounted within the upper portion of said cabinet so as to be viewable through the corresponding portion of said opening of the cabinet; a front wall member pivotally mounted, at its lower end, on said front of the cabinet for swinging movement between a closed position, in which said front wall member closes the lower portion of said opening, and an operative position, in which said front wall member is inclined upwardly and outwardly from said front of the cabinet for preventing the impingement on the screen of light that is reflected upwardly from in front of the front wall member; a projector mounted on said front wall member in back of the latter for projecting a video image upwardly and forwardly in respect to said screen when said front wall member is in said operative position; and a mirror mounted at the upper portion of said front wall member for reflecting said video image from said projector against said screen when said front wall member is in said operative position.
Claim 2
Dependent Claim
188 words
A video projecting apparatus comprising an upright cabinet having an opening at the front thereof; a screen mounted within the upper portion of said cabinet so as to be viewable through the corresponding portion of said opening of the cabinet; a front wall member pivotally mounted, at its lower end, on said front of the cabinet for swinging movement between a closed position, in which said front wall member closes the lower portion of said opening, and an operative position, in which said front wall member is inclined upwardly and outwardly from said front of the cabinet for preventing the impingement on the screen of light that is reflected upwardly from in front of the front wall member; a projector mounted on said front wall member in back of the latter for projecting a video image upwardly and forwardly in respect to said screen when said front wall member is in said operative position; and a mirror mounted at the upper portion of said front wall member for reflecting said video image from said projector against said screen when said front wall member is in said operative position.
Claim 3
Dependent Claim
24 words
A video projecting apparatus according to claim 1; in which said screen is inclined downwardly and rearwardly within said upper portion of the cabinet.
Claim 4
Dependent Claim
92 words
A video projecting apparatus according to claim 1; in which said mirror is carried by an extension of said front wall member which is pivotally secured to said upper portion of the front wall member; and further comprising link means connecting said cabinet, front wall member and extension for disposing said extension substantially coplanar with said front wall member when the latter is in said closed position and for tilting said extension and mirror rearwardly relative to the plane of said front wall member when the latter is in said operative position.
Claim 5
Dependent Claim
35 words
A video projecting apparatus according to claim 3; further comprising closure means for closing said opening at the front of the cabinet above said extension when said front wall member is in said closed position.
References Cited (Backward Citations)
US2509508A
Cited
US3036154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |