CA1208190A - Crt monitor tilt mechanism - Google Patents

Crt monitor tilt mechanism

Info

Publication number
CA1208190A
CA1208190A CA000441686A CA441686A CA1208190A CA 1208190 A CA1208190 A CA 1208190A CA 000441686 A CA000441686 A CA 000441686A CA 441686 A CA441686 A CA 441686A CA 1208190 A CA1208190 A CA 1208190A
Authority
CA
Canada
Prior art keywords
cabinet
gear rack
accordance
pinion tooth
pedestal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000441686A
Other languages
French (fr)
Inventor
Kenneth F. Lewinski
Donald H. Covey
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Teletype Corp
Original Assignee
Teletype Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Teletype Corp filed Critical Teletype Corp
Application granted granted Critical
Publication of CA1208190A publication Critical patent/CA1208190A/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47GHOUSEHOLD OR TABLE EQUIPMENT
    • A47G1/00Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
    • A47G1/16Devices for hanging or supporting pictures, mirrors, or the like
    • A47G1/24Appliances for adjusting pictures, mirrors, or the like, into a desired position, especially inclined
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/02Heads
    • F16M11/04Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20Undercarriages with or without wheels
    • F16M11/22Undercarriages with or without wheels with approximately constant height, e.g. with constant length of column or of legs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16MFRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00Details of stands or supports
    • F16M2200/04Balancing means
    • F16M2200/041Balancing means for balancing rotational movement of the head
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00Supports
    • Y10S248/917Video display screen support
    • Y10S248/919Adjustably orientable video screen support
    • Y10S248/922Angular
    • Y10S248/923Tilting

Abstract

ABSTRACT OF THE INVENTION
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

Description

TITLE
CRT :"lonitor Ti lt t'iechanism I~H N I (`AL~lE L~
This invention relates to a display screen of a cathode ray tuDe and to means for adjusting the angle of viewing of such a screen 1 0 B~:~lN D ~ RT
Use of cathode ray tubes (CRTs) in connection ~ith business macnines for production of displays on their display screens ;n response to operator-rontrolled keyboards has become commonplace. Time loss resulting from error correction in production of printed machine output has been minimized by such use. However, varia-tion in operator height, or in ambient conditions of tube use can result in glare from the display screen, thereby reduc;rg operator eff;ciency. To prevent or minimize glare, a display screen should be tiltab(e for changing the argularity or pitch of viewing the screen.

~v . , , ....

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1 Until no~, a numDer of various mecnanisms have Deen developed for tilting display screens of C2Ts. One of tnese comprises a rockaole platform on which a CRT is mounte~ within a cabinet. Another mechanism includes a 5 yoke-snaped oracket which is driven linearly in response to manual rotation of a knob~ the bracket being coupled to a CRT relatively remote from its display screen. Yet another mechanism comprises a driven worm gear meshed with a gear secured to a sr,a~t which in turn is fastened to the neck of a CRT.
~ ach of the heretofore known mechanisms, ~hile efficient for changing tube angularity or pitch, is rel atively expensive, because eacn requires two or more parts some of which require accurate machining; and additionally, usually most parts are located within a cabinet enclosing the CRT and associated electronics making the assemrly difficult and time-consuming.
~ISCLOSIJR~_QF I~_Ih~ENIIQ~
In accordance with ~he present invention, ~e
2~ provide a mechanism for tilting a display screen of a CRT wner~in the CRT is disposed within a cabinet which is pivotably mounted in a support arch. A detent gear rack naving a plura~ity of teeth is located in the sup-port arch; and a detent lever ha~in3 one end shaped as a Z5 pinion adapted to mesh ~ith the gear rack is slidably attached to the cabinet. The til~ mechanism includes means for keeping the pinion tooth in engagement with the gear rack.

:lZ~81~0
- 3 1 IHE P~A~lNG
FIG. 1 is a perspective vie~ of a clisplay screen disposed ~ithin a cabinet wnich is pivota~Ly mounted in a support arcn;
FI6 2 is ~ view partiaLly in verticaL section and partially in side elevation of a cabinet and of a tilt mechanism embodying one form of tne invention nerein, 3 part of the support ar^h oeing broken out for the purpose of illustration;
FIG 3 is a detail view of a portion of the side elevation shown in FIG 2; and FlG 4 is a detail vie~ of an alternate embod-iment of the invent;on DET~llED-n~c~ Q~
FIG 1 shows a perspective view of a CRT
monitor assembLy 10 comprising a cabinet 11 wjth an opening 12 and having a CRT (not shown) disposed within the cabinet 11. The CRT is positioned within the cabinet 11 so that the CRT s image display screen 13 is ~isible through the cabinet oPening 12 The cabinet 11, which may be molded from a thermal setting type of plastic material, is p;votably mounted in a suDport arch 14 havin3 a pedestal 15 with a substantially flat bottom surface 16 for positioning the CRT monitor assembly 10 on a flat surface such as a top of a desk. The support arch 14 and the pedestal 16 may be molded as a unitary body f om a thermal setting type of plastic material.

, .

~L2~319(~

1 FIG. 2 shows a partial siae elevation of the CRT monitor assembly 10 with a portion of the support arch 14 cut away to illustrate one of the embodiments of ~he monitor tilt mechanism in accordance With the preSent inventior.
The caDinet 11 is pivotably mounted in a su?port arch 14 in the following manner. The cabinet 11 has a substantial~y U-shaped groove 17 located in its bottom surface and extendin3 the width of the cabinet 11. The groove 17 is positioned so that the wei3ht of the cabinet 11 encLosing the CR~ and associated elea-tronics (not shown) is distributed substantiaLLy equally between the t~o portions of cabinet 11 separated by the groove 17.
The groove 17 is adapted to mate with a projection 18 extending up wa rd from the pedestal 15 in a direction close to the perpendicuLar to the bottom surface 16 of the pedestal 15 and across the ~idth of the pedestal 15. Proiection 18 terminates in a substan-tially cylindricaL surface 19 which fits into the groove 17. Sufficient clearance is pro~ided between the cylin-dricaL surface 1S and groove 17 allo~ing the cabinet 11 to pivot on the ^ylindrical surface 19 using it as a bearing surface. S~fficient clearance is provided between the CaDinet 11 and the support arch 14 to permit tilting of the caoinet 11 to the extreme two Positions indicated by the dotted Lines in FIG 2.

~20~

FIG. 3 snows a substantially L-shaDed detent lever 20 comprised of a long section 21 and a short sec~ion 22. A pair of elongated openirgs 23 and 24 are locate~ in the long section 21 The openings 23 and 24 5 are positioned to accept mount ing posts 25 and 26, resoectively, extending from a side of the caDinet 11.
The openings 23 and 24 have elongated shapes to permit a predetermined amount of sliding movement of the detent Lever 20 along an ;0a3inary line extending through the 10 centers of the two mounting posts 25 and 26. The posts 25 and 26 are located on a portion of a cabinet 11 whjch is l-ithin the support arch 14 ~hen the cabinet 11 is mounted in the support arch 14. When the detent lever 20 is slidably mounted on the mounting posts 25 and 26, 15 tne short portior 22 extends aLong the side of the cabinet 11 outside of tne arch 14 toWards the opening 12 in the cabinet a nd lies su~sta ntially parallel to the oottom surface 16 of the pedestal ~5.
The detent lever 20 has a hooi~ 27 located on 20 portjon 21 near the elongated opening 24. An extension spring 28 has one end attached to mountin~ post 25 and the other end attached to the nook 27. The spring 28 develops a sufficient force to kee,o the detent lever 20 in its uppermost Position~ ~ pair of retaining rings 29 25 are used to retain the detent lever Z0 on the mounting posts 25 and 26. The detent lever 20 may also be molded from a thermal setting type of plaStic material.

~Zq~819~

1 The end of the detent lever 20 opposite the L-shaoed end is shaped in a form of a pinion tooth 30 and is adapted to mesh ~ith a gear rack 31 having a plurality of teeth 32 ~hich are molded in a side of the S support arch 14. Spring 28, by forcing to and main-tain;ng detent lever 20 in its uppermost oosition, keeps the pinion tooth 30 in engagement with gear rack 31, thus preven~ing the cabinet 11 from pivoting around the cylind~ical surface 19. To tilt the cabinet 11, a do~n-1D ~ard force F, of sufficient magnitude to overcome theforce developed by spring 28, is applied to tne short section 22 of the detent lever 20. This action dis-engages the pinion tooth 30 from the gear rack 31 per-mitting the cabinet 11 to be pivoted between the t~o extreme positions sho~n by dotted lines in FIG. 2.
In FIG. 4, thr-re is shown an alternate embodi-ment of the invention wherein the spring 28 is replaced oy a resilient tab 33 ~hich is molded as part of the detent lever 20. The resilient tao 33 performs the same function aS the spring 28; namely, it develops a suffi-_ient force to keep the detent lever 20 in its uppermost position and the pinion tooth 30 engaged ~ith the gear rack 31. ~dditionally, resilient tab 33 has sufficient give to permit disengagement of the pinion tooth 30 from the gear rack 31 when a do~n~ard force F is applied to the section 22 of the detent lever 20.

Claims (8)

WHAT IS CLAIMED IS:
1. 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.
2. 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 cylin-drical 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.
3. A mechanism in accordance with claim 2 wherein said support arch and pedestal are molded from a thermal setting type of plastic material.
4. A mechanism in accordance with claim 3 wherein said gear rack is molded in said support arch.
5. A mechanism in accordance with claim 4 wherein means for keeping said pinion tooth in engage-ment with said gear rack comprises an extention spring.
6. 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.
7. A mechanism in accordance with claim 1, further comprising means for disengaging said pinion tooth from said gear rack.
8. A mechanism in accordance with claim 6 wherein means for keeping said pinion tooth in engage-ment with said gear rack comprises a resilient canti-lever tab projecting from the end of said detent lever opposite the end shaped as a pinion tooth.
CA000441686A 1983-03-18 1983-11-22 Crt monitor tilt mechanism Expired CA1208190A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/476,891 US4471931A (en) 1983-03-18 1983-03-18 CRT Monitor tilt mechanism
US476,891 1983-03-18

Publications (1)

Publication Number Publication Date
CA1208190A true CA1208190A (en) 1986-07-22

Family

ID=23893671

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000441686A Expired CA1208190A (en) 1983-03-18 1983-11-22 Crt monitor tilt mechanism

Country Status (2)

Country Link
US (1) US4471931A (en)
CA (1) CA1208190A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112984323A (en) * 2021-02-08 2021-06-18 深圳市前海昕文工贸有限公司 Novel notebook computer bracket and use method thereof

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JPS60142562U (en) * 1984-02-29 1985-09-20 日本発条株式会社 TV stand with tilt mechanism
US4669694A (en) * 1985-12-23 1987-06-02 American Telephone And Telegraph Company, At&T Bell Laboratories Tilt adjusting mechanism
US4726633A (en) * 1986-03-18 1988-02-23 Symbolics Inc. Tiltable monitor
US4807842A (en) * 1986-03-31 1989-02-28 Wang Laboratories, Inc. Tilt apparatus for a display monitor field
US4708313A (en) * 1986-03-31 1987-11-24 Wang Laboratories, Inc. Tilt apparatus for a display monitor
US4769634A (en) * 1986-05-12 1988-09-06 Digital Equipment Corporation Tilt apparatus for cathode ray tube display
EP0288667B1 (en) * 1987-03-30 1991-05-08 International Business Machines Corporation Tilt mechanism for display terminal
DE3741787C1 (en) * 1987-12-10 1989-07-06 Telefonbau & Normalzeit Gmbh Support and support bracket for display devices
JPH0343682U (en) * 1989-09-06 1991-04-24
US5024415A (en) * 1989-10-30 1991-06-18 At&T Bell Laboratories Tilt and swivel apparatus for a display monitor
US5520361A (en) * 1993-04-20 1996-05-28 Inkel Corporation Monitor tilting device
US5456468A (en) * 1993-09-17 1995-10-10 Wms Gaming Inc. Video monitor insertion and extraction machanism for video game machines
US7612999B2 (en) 1998-09-18 2009-11-03 Flo Healthcare Solutions, Llc Mobile clinical workstation
US8180485B2 (en) 2006-02-11 2012-05-15 Omnicell, Inc. Medication dispensing cart
US20070228680A1 (en) * 2006-04-03 2007-10-04 Metro Industries Inc. Modular Workstation
ES2599211T3 (en) * 2006-08-21 2017-01-31 Omnicell, Inc. Mobile workstations charged with solar energy
AU2011338579B2 (en) 2010-12-06 2015-07-16 Omnicell, Inc. Computer controlled and monitored medical storage system

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US1687821A (en) * 1926-04-30 1928-10-16 Fyrac Mfg Co Spotlight
US2161367A (en) * 1937-06-18 1939-06-06 American Forging & Socket Co Adjustable support
US2528973A (en) * 1949-01-06 1950-11-07 Philco Corp Adjustable support for cathode-ray tubes
US3026079A (en) * 1960-04-04 1962-03-20 Mary E Stack Adjustable support means for liquid dispensing vessels
US3784135A (en) * 1972-03-07 1974-01-08 Eastman Kodak Co Elevation mechanism
US3789140A (en) * 1972-07-03 1974-01-29 Teletype Corp Tiltable display screen assembly
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JPS563190A (en) * 1979-06-20 1981-01-13 Anritsu Electric Co Ltd Truck for electronic equipment
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112984323A (en) * 2021-02-08 2021-06-18 深圳市前海昕文工贸有限公司 Novel notebook computer bracket and use method thereof

Also Published As

Publication number Publication date
US4471931A (en) 1984-09-18

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