US4556189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
CRT Monitor tilt mechanism
Assignee: AT&T Teletype Corp
•
Filing: 1984-02-06
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Granted: 1985-12-03
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Expires: 2004-02-06
Abstract
Abstract A mechanism for tilting a display screen of a CRT housed in a cabinet includes a projection extending from the bottom surface of the cabinet for supporting one end of the cabinet and providing a pivot point for tilting the cabinet. A foot slidably mounted at the other end of the cabinet supports that end at a selectable height; the foot having a ratchet rack on one of its surfaces is normally engaged by a detent lever locking the foot in position.
Inventors
- 👤 Kenneth R. Kirpluk
- 👤 Kenneth F. Lewinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/10; F16M2200/00; F16M2200/02; F16M2200/021; F16M2200/024; Y; Y10; Y10S; Y10S248/00; Y10S248/917; Y10S248/919; Y10S248/922; Y10S248/923
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
238 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet having a top and a bottom joined by two sides, a back and a front having an opening to permit viewing of the display screen, the mechanism comprising: means for supporting the front end of the cabinet on a substantially flat mounting surface; means for pivoting the cabinet about the support means; means for supporting the back end of the cabinet at a selected height above the mounting surface including: a foot slidably mounted on the back of the cabinet and arranged to move in a path substantially parallel to the vertical center line of the cabinet; the foot having a first end adapted to contact the mounting surface; means for urging the foot in the direction towards the bottom of the cabinet and into contact with the mounting surface, including an extension spring having one end connected to the second end of the foot and having the other connected to the detent lever; means for preventing the foot from moving in the direction towards the top of the cabinet including: a ratchet rack having a plurality of teeth located on a surface of the foot; a detent layer slidably mounted on the bottom of the cabinet, the lever having one end shaped as a pawl adapted to engage the ratchet rack; and means for urging the pawl into engagement with the ratchet rack.
Claim 2
Dependent Claim
238 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet having a top and a bottom joined by two sides, a back and a front having an opening to permit viewing of the display screen, the mechanism comprising: means for supporting the front end of the cabinet on a substantially flat mounting surface; means for pivoting the cabinet about the support means; means for supporting the back end of the cabinet at a selected height above the mounting surface including: a foot slidably mounted on the back of the cabinet and arranged to move in a path substantially parallel to the vertical center line of the cabinet; the foot having a first end adapted to contact the mounting surface; means for urging the foot in the direction towards the bottom of the cabinet and into contact with the mounting surface, including an extension spring having one end connected to the second end of the foot and having the other connected to the detent lever; means for preventing the foot from moving in the direction towards the top of the cabinet including: a ratchet rack having a plurality of teeth located on a surface of the foot; a detent layer slidably mounted on the bottom of the cabinet, the lever having one end shaped as a pawl adapted to engage the ratchet rack; and means for urging the pawl into engagement with the ratchet rack.
Claim 3
Dependent Claim
43 words
A mechanism in accordance with claim 1 wherein means for supporting the front end of the cabinet includes at least one projection extending from the bottom surface of the cabinet, the projection terminating in a knifelike edge substantially parallel to the display screen.
Claim 4
Dependent Claim
24 words
A mechanism in accordance with claim 1 wherein the means for urging the pawl into engagement with the ratchet rack includes a compression spring.
Claim 5
Dependent Claim
270 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet located on a substantially flat mounting surface, the cabinet having a top and a bottom joined by two sides, a back and a front having an opening to permit viewing of the display screen, the mechanism comprising: a projection extending from the bottom of the cabinet supporting the front end of the cabinet above the mounting surface; the projection terminating in a knifelike edge substantially parallel to the display screen cabinet, the edge providing a pivot line for the cabinet; a foot slidably mounted on the back of the cabinet and arranged to move in a path substantially parallel to the vertical center line of the cabinet; the foot having a first end adapted to contact the mounting surface; a ratchet rack having a plurality of teeth located on a surface of the foot; a detent lever slidably mounted on the bottom surface of the cabinet, the lever having one end shaped as a pawl adapted to engage the ratchet rack preventing the foot from moving in the direction towards the top of the cabinet thereby determining the extent of elevation of the back end of the cabinet above the mounting surface; a compression spring for urging the pawl into engagement with the ratchet rack; and an extension spring having one end connected to the second end of the foot and having the other end connected to the detent lever for urging the foot in the direction towards the bottom of the cabinet and the first end of the foot into engagement with the mounting surface.
Claim 6
Dependent Claim
270 words
A mechanism for tilting a display screen of a CRT disposed within a cabinet located on a substantially flat mounting surface, the cabinet having a top and a bottom joined by two sides, a back and a front having an opening to permit viewing of the display screen, the mechanism comprising: a projection extending from the bottom of the cabinet supporting the front end of the cabinet above the mounting surface; the projection terminating in a knifelike edge substantially parallel to the display screen cabinet, the edge providing a pivot line for the cabinet; a foot slidably mounted on the back of the cabinet and arranged to move in a path substantially parallel to the vertical center line of the cabinet; the foot having a first end adapted to contact the mounting surface; a ratchet rack having a plurality of teeth located on a surface of the foot; a detent lever slidably mounted on the bottom surface of the cabinet, the lever having one end shaped as a pawl adapted to engage the ratchet rack preventing the foot from moving in the direction towards the top of the cabinet thereby determining the extent of elevation of the back end of the cabinet above the mounting surface; a compression spring for urging the pawl into engagement with the ratchet rack; and an extension spring having one end connected to the second end of the foot and having the other end connected to the detent lever for urging the foot in the direction towards the bottom of the cabinet and the first end of the foot into engagement with the mounting surface.
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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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |