Patent US4922672A successfully refreshed from Google Patents.
Patent US4281352A successfully refreshed from Google Patents.
US4281352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact projection television system
Assignee: Individual
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Filing: 1979-03-23
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Granted: 1981-07-28
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Expires: 1999-03-23
Abstract
Abstract A compact projection television system is disclosed which includes an enclosure having a movable front portion hingedly attached to a fixed rear portion so as to be movable between an open and a closed position. When the movable portion is in the closed position a large viewing screen, projection optics and a television receiver are hidden from sight within the enclosure. When the movable portion is rotated to the open position, the viewing screen elevates and the projection optics unfold to ready the projection television system for use. The raising of the screen and the unfolding of the optics are caused by linkages connecting those members between the fixed and movable portions of the enclosure.
Inventors
- 👤 Andrew E. Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:51
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
252 words
A compact projection television system comprising: enclosure means including a fixed portion having a substantially horizontal first surface, and a movable portion coupled to said fixed portion and having a second surface, said movable portion being movable between a closed position in which said first surface and said second surface are substantially perpendicular and an open position in which said first surface and said second surface are substantially parallel; television receiver means supported by said first surface and occupying a first volume of space; screen means coupled to said fixed portion so as to be movable between a raised position and a lowered position, said screen means including a screen support slidably coupled to said fixed portion so as to be vertically movable between said raised postion and said lowered position, a screen, and an adjustable bracket means for attaching said screen to said screen support; first linkage means coupling said screen means to said movable portion so that when said movable portion is in said closed position said screen means is in said lowered position and when said movable portion is in said open position said screen means is in said raised position; mirror means coupled to said movable portion for reflecting a picture image produced by said television receiver means onto said screen means when said movable portion is in said open position and lens means disposed along an optical path between said television receiver means and said mirror means when said movable closure portion is in said open position.
Claim 2
Dependent Claim
252 words
A compact projection television system comprising: enclosure means including a fixed portion having a substantially horizontal first surface, and a movable portion coupled to said fixed portion and having a second surface, said movable portion being movable between a closed position in which said first surface and said second surface are substantially perpendicular and an open position in which said first surface and said second surface are substantially parallel; television receiver means supported by said first surface and occupying a first volume of space; screen means coupled to said fixed portion so as to be movable between a raised position and a lowered position, said screen means including a screen support slidably coupled to said fixed portion so as to be vertically movable between said raised postion and said lowered position, a screen, and an adjustable bracket means for attaching said screen to said screen support; first linkage means coupling said screen means to said movable portion so that when said movable portion is in said closed position said screen means is in said lowered position and when said movable portion is in said open position said screen means is in said raised position; mirror means coupled to said movable portion for reflecting a picture image produced by said television receiver means onto said screen means when said movable portion is in said open position and lens means disposed along an optical path between said television receiver means and said mirror means when said movable closure portion is in said open position.
Claim 3
Dependent Claim
33 words
A compact projection television system as recited in claim 1 wherein lens means includes a lens, a lens support holding said lens, and coupling means coupling said lens support to said enclosure means.
Claim 4
Dependent Claim
80 words
A compact projection television system as recited in claim 2 wherein said coupling means includes second linkage means attaching said lens support to said movable portion, and third linkage means attaching said lens support to said fixed portion, whereby interaction between said second linkage means and said third linkage means as said movable portion is moved from said open position to said closed position causes said lens support to move so as not to enter said first volume of space.
Claim 5
Dependent Claim
47 words
A compact projection television system as recited in claim 3 wherein said second linkage means is a hinge, and said third linkage means is an elongated linkage arm having one end pivotally attached to said fixed portion and the other end pivotally attached to said lens support.
Claim 6
Dependent Claim
71 words
A compact projection television system as recited in claim 3 wherein said second linkage means is a first elongated linkage arm having one end pivotally attached to said movable portion and having the other end pivotally attached to said lens support, and said third linkage means is a second elongated linkage arm having one end pivotally attached to said fixed portion and the other end pivotally attached to said lens support.
Claim 7
Dependent Claim
63 words
A compact projection television system as recited in claim 3 wherein said second linkage means is a track means attached to said movable portion and a track follower means attached to said lens support, and said third linkage means is an elongated linkage arm having one end pivotally attached to said fixed portion and the other end pivotally attached to said lens support.
Claim 8
Dependent Claim
66 words
A compact projection television system as recited in claim 3 wherein said second linkage means is an elongated linkage arm having one end pivotally attached to said movable portion and having the other end pivotally attached to said lens support, and said third linkage means includes at least one guide arm attached at one end to said lens support and slidably coupled to said fixed portion.
Claim 9
Dependent Claim
21 words
A compact projection television system as recited in claim 2 wherein said lens support is rigidly attached to said movable portion.
Claim 10
Dependent Claim
46 words
A compact projection television system as recited in claim 1 wherein said screen means includes a rear-projection type viewing screen, and said mirror means includes two reflective surfaces adapted to reflect an image from said television receiver means to a rear surface of said viewing screen.
Claim 11
Dependent Claim
49 words
A compact projection television system as recited in claim 1 wherein said first linkage means includes pulley means coupled to said fixed portion, and cable means trained around said pulley means and having one end attached to said screen support and the other end attached to said movable portion.
Claim 12
Dependent Claim
28 words
A compact projection television system as recited in claim 1 further comprising first shroud means attached to said screen support to inhibit ambient light from striking said screen.
Claim 13
Dependent Claim
33 words
A compact projection television system as recited in claim 11 further comprising second shroud means coupled between said fixed portion and said movable portion to shade said lens means and said television receiver.
Claim 14
Dependent Claim
151 words
A compact projection television system cabinet for use with a television receiver comprising: enclosure means includine a fixed portion, and a movable portion coupled to said fixed portion and movable between an open and a closed position; screen means coupled to said fixed portion; linkage means coupling said screen means to said movable portion so that said screen means is in a lowered position when said movable portion is in said closed position and is in a raised position when said movable portion is in said open position; a lens means for projecting a magnified image upon said screen means from the C.R.T. of a television supported by said fixed portion; and linkage means coupling said lens means to both said movable portion and said fixed portion so that when said movable portion is in said closed position said lens means is moved so as not to contact said television receiver.
Claim 15
Dependent Claim
151 words
A compact projection television system cabinet for use with a television receiver comprising: enclosure means includine a fixed portion, and a movable portion coupled to said fixed portion and movable between an open and a closed position; screen means coupled to said fixed portion; linkage means coupling said screen means to said movable portion so that said screen means is in a lowered position when said movable portion is in said closed position and is in a raised position when said movable portion is in said open position; a lens means for projecting a magnified image upon said screen means from the C.R.T. of a television supported by said fixed portion; and linkage means coupling said lens means to both said movable portion and said fixed portion so that when said movable portion is in said closed position said lens means is moved so as not to contact said television receiver.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |