Patent US5491585A successfully refreshed from Google Patents.
US5491585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable rear screen television cabinet
Assignee: Projectavision Inc
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Filing: 1994-04-07
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Granted: 1996-02-13
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Expires: 2014-04-07
Abstract
Abstract A rear screen television cabinet, comprising a cabinet having front portions including a top, two sides and a front face, viewing surface on the front face, a mirror system comprising a plurality of mirrors for reflecting and successively enlarging and reflecting an incident beam onto the rear screen and a rear assembly which substantially closes said cabinet and is foldable or collapsible to render said cabinet portable, is disclosed. The cabinet's mirror system receives and successively enlarges and reflect an incident beam from a projector, to project a large image onto the viewing surface.
Inventors
- 👤 Eugene Dolgoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:41
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A collapsible rear screen television cabinet, comprising: a front portion having a top, two sides and a front face; a rear screen supported on said front face; a mirror system comprising at least one mirror for reflecting an image from a projection means onto the rear screen; a base panel attached to the front portion to support the projection means in an operational condition of the cabinet; and a collapsible rear assembly forming with said front portion substantially closing said cabinet, wherein said cabinet in a collapsed condition has a substantially smaller profile than in the operational condition.
Claim 2
Dependent Claim
98 words
A collapsible rear screen television cabinet, comprising: a front portion having a top, two sides and a front face; a rear screen supported on said front face; a mirror system comprising at least one mirror for reflecting an image from a projection means onto the rear screen; a base panel attached to the front portion to support the projection means in an operational condition of the cabinet; and a collapsible rear assembly forming with said front portion substantially closing said cabinet, wherein said cabinet in a collapsed condition has a substantially smaller profile than in the operational condition.
Claim 3
Dependent Claim
16 words
The rear screen television cabinet of claim 1, wherein said rear assembly comprises a base panel.
Claim 4
Dependent Claim
17 words
The rear screen television cabinet of claim 2, wherein said rear assembly further comprises a rear panel.
Claim 5
Dependent Claim
15 words
The rear screen television cabinet of claim 3, wherein said rear assembly comprises top panel.
Claim 6
Dependent Claim
18 words
The rear screen television cabinet of claim 4, wherein said rear assembly comprises right and left side panels.
Claim 7
Dependent Claim
15 words
The rear screen television cabinet of claim 2, further comprising a base panel hinging means.
Claim 8
Dependent Claim
15 words
The rear screen television cabinet of claim 3, further comprising a rear panel hinging means.
Claim 9
Dependent Claim
14 words
The rear screen television cabinet of claim 3, wherein said top panel is removable.
Claim 10
Dependent Claim
14 words
The rear screen television cabinet of claim 3, wherein said top panel is hinged.
Claim 11
Dependent Claim
15 words
The rear screen television cabinet of claim 3, further comprising a top panel fastening means.
Claim 12
Dependent Claim
16 words
The rear screen television cabinet of claim 4, wherein said left and right panels are swivelable.
Claim 13
Dependent Claim
24 words
The rear screen television cabinet of claim 1, wherein said mirror system comprises a first mirror positioned to receive and reflect an incident beam.
Claim 14
Dependent Claim
29 words
The rear screen television cabinet of claim 12, wherein said mirror system further comprises a second mirror positioned to receive and reflect the beam reflected from the first mirror.
Claim 15
Dependent Claim
33 words
The rear screen television cabinet of claim 13, wherein said mirror system further comprises a third mirror positioned to receive and reflect the beam reflected from the second mirror to the viewing area.
Claim 16
Dependent Claim
147 words
A rear screen television cabinet, comprising: a front portion having a top, two sides and a front face; a viewing surface on said front face; a mirror system comprising at least one mirror for reflecting and successively enlarging and reflecting an incident beam onto the viewing surface, wherein said mirror system comprises: a first mirror positioned to receive, enlarge and reflect an incident beam; a second mirror positioned to receive, enlarge and reflect the beam reflected from the first mirror; a third mirror positioned to receive, enlarge and reflect the beam reflected from the second mirror toward the rear screen; a rear assembly combined with said front portion substantially closing said cabinet and wherein said rear assembly is foldable or collapsible to facilitate transportation and wherein said rear assembly, comprises: a base panel; a rear panel; a removable top panel; and swivelable right and left side panels.
Claim 17
Dependent Claim
147 words
A rear screen television cabinet, comprising: a front portion having a top, two sides and a front face; a viewing surface on said front face; a mirror system comprising at least one mirror for reflecting and successively enlarging and reflecting an incident beam onto the viewing surface, wherein said mirror system comprises: a first mirror positioned to receive, enlarge and reflect an incident beam; a second mirror positioned to receive, enlarge and reflect the beam reflected from the first mirror; a third mirror positioned to receive, enlarge and reflect the beam reflected from the second mirror toward the rear screen; a rear assembly combined with said front portion substantially closing said cabinet and wherein said rear assembly is foldable or collapsible to facilitate transportation and wherein said rear assembly, comprises: a base panel; a rear panel; a removable top panel; and swivelable right and left side panels.
Claim 18
Dependent Claim
37 words
The rear screen television cabinet of claim 13, wherein at least one mirror of the mirror system contains optical power to alter the wavefront of light that hit it in a way other than simple planar reflection.
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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |