GB941198A - An improved collapsible stand for a flexible projection screen - Google Patents

An improved collapsible stand for a flexible projection screen

Info

Publication number
GB941198A
GB941198A GB17618/61A GB1761861A GB941198A GB 941198 A GB941198 A GB 941198A GB 17618/61 A GB17618/61 A GB 17618/61A GB 1761861 A GB1761861 A GB 1761861A GB 941198 A GB941198 A GB 941198A
Authority
GB
United Kingdom
Prior art keywords
ring
arms
tube
screen
stand
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
GB17618/61A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB941198A publication Critical patent/GB941198A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00Re-forming shaped glass
    • C03B23/20Uniting glass pieces by fusing without substantial reshaping
    • C03B23/207Uniting glass rods, glass tubes, or hollow glassware
    • C03B23/217Uniting glass rods, glass tubes, or hollow glassware for the production of cathode ray tubes or similarly shaped tubes
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00Re-forming shaped glass
    • C03B23/20Uniting glass pieces by fusing without substantial reshaping
    • C03B23/24Making hollow glass sheets or bricks
    • C03B23/245Hollow glass sheets
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/04Joining glass to metal by means of an interlayer
    • C03C27/048Joining glass to metal by means of an interlayer consisting of an adhesive specially adapted for that purpose
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06Joining glass to glass by processes other than fusing
    • C03C27/10Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/66Units comprising two or more parallel glass or like panes permanently secured together
    • E06B3/673Assembling the units
    • E06B3/67326Assembling spacer elements with the panes
    • E06B3/67334Assembling spacer elements with the panes by soldering; Preparing the panes therefor
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/54Accessories
    • G03B21/56Projection screens
    • G03B21/58Projection screens collapsible, e.g. foldable; of variable area
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/20Seals between parts of vessels
    • H01J5/22Vacuum-tight joints between parts of vessel
    • H01J5/26Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26Sealing together parts of vessels
    • H01J9/263Sealing together parts of vessels specially adapted for cathode-ray tubes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00Discharge tubes and lamps
    • H01J2893/0033Vacuum connection techniques applicable to discharge tubes and lamps
    • H01J2893/0037Solid sealing members other than lamp bases
    • H01J2893/0041Direct connection between insulating and metal elements, in particular via glass material
    • H01J2893/0043Glass-to-metal or quartz-to-metal, e.g. by soldering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Accessories Of Cameras (AREA)

Abstract

941,198. Stands for projection screens. H. RIEDEL. May 15, 1961 [May 14, 1960], No. 17618/61. Heading G2J. A stand for a projection screen capable of being rolled up is characterized by the feature that it comprises a stand tube, which is mounted upon a detachable and collapsible foot, and upon which an upper holding ring and a lower holding ring are mounted, these rings each being equipped with a pair of rocking arms carrying a horizontal batten, the screen being kept taut when in use between these two battens, and at least one of the holding rings being slidably adjustable along the stand tube, and being capable of being held in its adjustable position. As shown (Fig. 1) a screen stand comprises a tube 1, upper rocker arms 6 and 7 pivotally mounted on a ring 2, lower rocker arms 25 and 26 pivotally mounted on a ring 24 and detachable feet members 27 which are releasably held by spring detent means (Fig. 3 - not shown) in slots (Fig. 4 - not shown) in a base 29. Lugs 43 of a drop ring 42 engage the feet members 27 to hold them in position. The screen 17 is attached at top and bottom to battens 34, 37 which are supported on the ends of the rocker arms by means of pins 47 engageable in holes in the battens and pivoted resilient shackles 49 (which may be detachable from the rocker arms). Lugs 35 and 36 on the ring 24 and lugs 8 and 9 and spring detent pins 10 and 11 (Fig. 5 not shown) on the ring 2 are provided to hold the rocker arms in the illustrated positions. To enable the tension in the screen 17 to be adjusted ring 2 is slidably adjusted along the tube 1 by means of a screwthreaded bolt 4 (Fig. 2) having a milled adjusting disc 3 and extending between the ring 2 and a fixed ring 5. The lower part of the stand is arranged in a telescopic manner with a tube 22 which may be clamped to tube 1 in any position by rotation of a ring 23. For convenience of transport, the arms 25, 26 may be folded into the position shown in dotted lines and similarly, after the spring detent pins 10, 11 have been depressed, the arms 6 and 7 may be folded into the positions 6<SP>1</SP>, 7<SP>1</SP>. Further, the feet members 27 may be detached and stowed as shown in Fig. 2 with their lower ends engaging in slots in the ring 24 and their upper ends held by a clamping ring 30. The screen-when rolled up-may be stowed inside the hollow tubes 1 and 22. In a modification (Fig. 7) the arms are held in the operative position by means of the bent over ends of a resilient shackle 50, pivoted at 51 to the ring 2. In a second embodiment (Fig. 8) the upper rocker arm mounting ring 55 is screw threadedly mounted on a tube member 57 which is rotatably mounted on the top of the stand tube 84. The ring 55 is prevented from rotating by means of a tongue 89 sliding in an axial slot therein and secured to a fixed ring 90 so that adjustment of the tension of the screen is now obtained by rotation of the member 51. Further, the upper rocker arms 68 (Fig. 12) which are pivotally mounted in slots 59 in the ring 55 are hollow and carry spring-urged rollers 69 which engage a cam surface 78 of the ring 55 and snap into a recess 63 when the rocker arms are raised to hold them in their operative positions. When both sets of rocker arms are folded down for transport, the upper arms 68 engage over the lower arms 95 (as shown in Fig. 1), a resilient locking band 99 being provided for holding the arms in position. The feet members 101 are stowed for transport as in Fig. 8. A modified shackle 106 for attaching a batten 108 to a rocker arm 104 is shown in Fig. 15. A modified foot arrangement is illustrated in Figs. 17 and 18 (not shown).
GB17618/61A 1960-05-14 1961-05-15 An improved collapsible stand for a flexible projection screen Expired GB941198A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER27955A DE1123844B (en) 1960-05-14 1960-05-14 Stand for a rollable projection screen

Publications (1)

Publication Number Publication Date
GB941198A true GB941198A (en) 1963-11-06

Family

ID=7402594

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17618/61A Expired GB941198A (en) 1960-05-14 1961-05-15 An improved collapsible stand for a flexible projection screen

Country Status (2)

Country Link
DE (2) DE1123844B (en)
GB (1) GB941198A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2037322A1 (en) * 2007-09-11 2009-03-18 Seiko Epson Corporation Screen
FR2930652A1 (en) * 2008-04-28 2009-10-30 Screen Res Soc Par Actions Sim PROJECTION SCREEN EQUIPPED WITH MEANS FOR EXERCISING VERTICAL AND HORIZONTAL TRACTION FORCES
CN109358469A (en) * 2018-11-20 2019-02-19 王建伟 A kind of anti-unusual fluctuation supporting mechanism for projection device curtain

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106168324A (en) * 2016-08-31 2016-11-30 李达 A kind of film and tv photography rocking arm
CN107367896A (en) * 2017-07-25 2017-11-21 张家港宝视特影视器材有限公司 Fast Installation folding portable curtain support

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2037322A1 (en) * 2007-09-11 2009-03-18 Seiko Epson Corporation Screen
US7894132B2 (en) 2007-09-11 2011-02-22 Seiko Epson Corporation Screen
FR2930652A1 (en) * 2008-04-28 2009-10-30 Screen Res Soc Par Actions Sim PROJECTION SCREEN EQUIPPED WITH MEANS FOR EXERCISING VERTICAL AND HORIZONTAL TRACTION FORCES
WO2009136113A1 (en) * 2008-04-28 2009-11-12 Screen Research Projector screen equipped with means for applying vertical and horizontal tensile forces
US8120846B2 (en) 2008-04-28 2012-02-21 Yves Trelohan Projector screen equipped with means for applying vertical and horizontal tensile forces
CN109358469A (en) * 2018-11-20 2019-02-19 王建伟 A kind of anti-unusual fluctuation supporting mechanism for projection device curtain
CN109358469B (en) * 2018-11-20 2020-12-18 杭州海类科技有限公司 Abnormal movement prevention supporting mechanism for projection equipment curtain

Also Published As

Publication number Publication date
DE1123844B (en) 1962-02-15
DE1154291B (en) 1963-09-12

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