GB941198A - An improved collapsible stand for a flexible projection screen - Google Patents
An improved collapsible stand for a flexible projection screenInfo
- 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
Links
- 230000000994 depressogenic effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
- B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/207—Uniting glass rods, glass tubes, or hollow glassware
- C03B23/217—Uniting glass rods, glass tubes, or hollow glassware for the production of cathode ray tubes or similarly shaped tubes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/24—Making hollow glass sheets or bricks
- C03B23/245—Hollow glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/04—Joining glass to metal by means of an interlayer
- C03C27/048—Joining glass to metal by means of an interlayer consisting of an adhesive specially adapted for that purpose
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window 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
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/673—Assembling the units
- E06B3/67326—Assembling spacer elements with the panes
- E06B3/67334—Assembling spacer elements with the panes by soldering; Preparing the panes therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/20—Seals between parts of vessels
- H01J5/22—Vacuum-tight joints between parts of vessel
- H01J5/26—Vacuum-tight joints between parts of vessel between insulating and conductive parts of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus 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
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/26—Sealing together parts of vessels
- H01J9/263—Sealing together parts of vessels specially adapted for cathode-ray tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0037—Solid sealing members other than lamp bases
- H01J2893/0041—Direct connection between insulating and metal elements, in particular via glass material
- H01J2893/0043—Glass-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).
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)
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)
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 |
-
1960
- 1960-05-14 DE DER27955A patent/DE1123844B/en active Pending
-
1961
- 1961-05-15 GB GB17618/61A patent/GB941198A/en not_active Expired
- 1961-05-18 DE DER30360A patent/DE1154291B/en active Pending
Cited By (7)
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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