Patent US4471931A successfully refreshed from Google Patents.
US4471931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CRT Monitor tilt mechanism
Assignee: AT&T Teletype Corp
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Filing: 1983-03-18
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Granted: 1984-09-18
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Expires: 2003-03-18
Abstract
Abstract A mechanism for tilting a display screen of a CRT includes a detent gear rack molded in the side of an arch supporting therein a pivotably mounted cabinet housing the CRT. A molded detent lever is slidably attached to a side of the cabinet and is arranged to normally be in engagement with the detent gear rack.
Inventors
- 👤 Donald H. Covey
- 👤 Kenneth F. Lewinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:25
CPC Classifications
A; A47; A47G; A47G1/00; A47G1/16; A47G1/24; F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/10; F16M11/20; F16M11/22; F16M2200/00; F16M2200/04; F16M2200/041; Y; Y10; Y10S; Y10S248/00; Y10S248/917; Y10S248/919; Y10S248/922; Y10S248/923
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet, the mechanism comprising: a support arch mounted on a pedestal; means for pivotably mounting said cabinet in said support arch; a detent gear rack having a plurality of teeth located on said support arch; a detent lever slidably attached to said cabinet, said lever having one end shaped as a pinion tooth adapted to mesh with said gear rack; and means for keeping said pinion tooth in engagement with said gear rack whereby said cabinet is prevented from pivoting.
Claim 2
Dependent Claim
93 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet, the mechanism comprising: a support arch mounted on a pedestal; means for pivotably mounting said cabinet in said support arch; a detent gear rack having a plurality of teeth located on said support arch; a detent lever slidably attached to said cabinet, said lever having one end shaped as a pinion tooth adapted to mesh with said gear rack; and means for keeping said pinion tooth in engagement with said gear rack whereby said cabinet is prevented from pivoting.
Claim 3
Dependent Claim
70 words
A mechanism in accordance with claim 1, wherein means for pivotably mounting said cabinet comprises: a projection extending upward from said pedestal and substantially across the width of said pedestal, said projection terminating in a substantially cylindrical surface; and said cabinet having a substantially U-shaped groove located on the bottom surface of said cabinet and extending substantially the width of said cabinet, said groove adapted to receive said cylindrical surface.
Claim 4
Dependent Claim
23 words
A mechanism in accordance with claim 2 wherein said support arch and pedestal are molded from a thermal setting type of plastic material.
Claim 5
Dependent Claim
17 words
A mechanism in accordance with claim 3 wherein said gear rack is molded in said support arch.
Claim 6
Dependent Claim
24 words
A mechanism in accordance with claim 4 wherein means for keeping said pinion tooth in engagement with said gear rack comprises an extension spring.
Claim 7
Dependent Claim
35 words
A mechanism in accordance with claim 1 wherein said detent lever is molded from a thermal setting type of plastic material, and the end opposite the end shaped as a pinion tooth is substantially L-shaped.
Claim 8
Dependent Claim
19 words
A mechanism in accordance with claim 1, further comprising means for disengaging said pinion tooth from said gear rack.
Claim 9
Dependent Claim
41 words
A mechanism in accordance with claim 6 wherein means for keeping said pinion tooth in engagement with said gear rack comprises a resilient cantilever tab projecting from the end of said detent lever opposite the end shaped as a pinion tooth.
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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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |