US3685040A - Display apparatus - Google Patents

Display apparatus Download PDF

Info

Publication number
US3685040A
US3685040A US27790A US3685040DA US3685040A US 3685040 A US3685040 A US 3685040A US 27790 A US27790 A US 27790A US 3685040D A US3685040D A US 3685040DA US 3685040 A US3685040 A US 3685040A
Authority
US
United States
Prior art keywords
closures
light
positions
display device
latch
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 - Lifetime
Application number
US27790A
Other languages
English (en)
Inventor
Richard T Hart
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.)
Science Associates Inc
Original Assignee
Science Associates Inc
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 Science Associates Inc filed Critical Science Associates Inc
Application granted granted Critical
Publication of US3685040A publication Critical patent/US3685040A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/375—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the position of the elements being controlled by the application of a magnetic field

Definitions

  • ABSTRACT A display apparatus having a plurality of horizontally extending panels pivotally connected to form an endless belt, the belt of panels being movable in a closed path having a front vertical view portion, each of the panels having a plurality of longitudinally spaced groups of light passages, each group of passages being arranged in horizontal rows and vertical columns, from lamps positioned behind the panels when they are in the front view portion of their paths of movement for transmitting light through the light passages, each of the light passages having a closure operatively associated therewith and movable between an upper operative position wherein it is held by a latch pin and wherein its associated light passage is closed and a lower inoperative or open position wherein the closure does not prevent transmittal of light through its associated light passage.
  • the display apparatus also includes means for moving selected ones of the
  • SHEET 3 BF 5 lll/l/E/VTOR Richard T. Hort W XW ATTORNEY PATENTEDAus 15 m2
  • This invention relates to display apparatus.
  • An object of this invention is to provide a new and improved display apparatus which may present a large amount of continuously transmitted alpha-numeric information for a relatively long period of time.
  • Another object is to provide a display apparatus which will display a large amount of information for an appreciable period of time even though the information is being transmitted for display, such as letters and numbers over a teletype line, at a very rapid rate.
  • Still another object is to provide a display device wherein the information is presented by directly transmitted light.
  • Still another object is to provide a display apparatus having a plurality of horizontally extending panels pivotally connected to form an endless movable belt or display assembly which has a front upwardly moving visible portion, with each panel having a plurality of groups of light passages spaced longitudinally there along, and closures for selectively closing the light passages, and means for selectively causing a whole line of teletype information to be written or presented by groups of light passages of each panel during its movement into the bottom visible portion of its upwardly moving visible portion of its path of movement.
  • An important object is to provide a display device usable with a display apparatus of the type described which had an elongate horizontally extending substantially vertical panel provided with a plurality of groups of light passages arranged in predetermined arrays and closures operative associated with each of the panels for individually and selectively closing the light passages.
  • Another object is to provide a display device wherein the closure members are movable mounted in elongate internal cavities of the panel which intersect the light passages.
  • Still another object is to provide a display device wherein the closures for the light passages are held by latch pins upper positions in cavities of the panel when the panel is in a vertical upright position.
  • a further object is to provide a display device of the type disclosed wherein the latch pins permit vertical displacement or movement of the closures by gravity from their upper positions in the cavities to permit them to fall freely to their lower positions in the cavities, the closure when in one of their upper and lower positions closing their associated light passages.
  • a still further object is to provide a display device of the type disclosed wherein the latch pins are movable from their inoperative to their operative positions by operator means, such as electromagnets disposed inwardly and spaced from the panels.
  • Another object is to provide a display apparatus of the type described wherein all of the closures of a panel are moved to their upper positions in their cavities and the latch pins to their operative latching positions holding their associated closures in their upper positions during the movement of the panel from the upper end of the front visible portion of its movement to the lower end of the front visible portion of its path of movement.
  • FIG. 1 is a front view, with some parts removed, of a display apparatus embodying the invention
  • FIG. 2 is a sectional view of the apparatus, with some parts broken away taken on line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged fragmentary view with some parts broken away of an end section of a panel embodying the invention
  • FIG. 4 is a sectional view takenon line 4-4 of FIG.
  • FIG. 5 is an enlarged vertical fragmentary sectional view showing the endless belt display assembly of the apparatus
  • FIG. 6 is a sectional view, with some parts broken away taken on line 6-6 of FIG. 4;
  • FIG. 7 is an enlarged sectional view taken on lines 7j of FIG. 1;
  • FIG. 8 is a sectional view taken on line 8-8 of FIG.
  • FIG. 9 is an enlarged sectional view taken on line 9- 9 of FIG. 1;
  • FIG. !0 is a fragmentary perspective view of a display assembly showing the manner in which the panels are formed of panel sections;
  • FIG. 11 is a framentary perspective view of one of the panel sections
  • FIG. 12 is an enlarged sectional view taken on line 12-12 ofFIG. 10;
  • FIG. 13 is a sectional view taken on line 13-13 of FIG. 8;
  • FIG. 14 is a front fragmentary view of one of the panels showing a closure in a cavity being held in its upper operative position closing its associated light passage by a latch pin;
  • FIG. 15 is a sectional view taken on line 15-15 of FIG. 14;
  • FIG. 16 is a sectional view taken on line 16-16 of FIG. 14;
  • FIG. 17 is a sectional view taken on line 17-17 of FIG. 16;
  • FIG. 18 is a view similar to FIG. 14 showing the closure member in its lower inoperative position in the cavity and the positions of the closure and the latch pin during the upward movement of the panel in the front view portion of its path of movement;
  • FIG. 19 is a sectional view taken on line 19-19 of FIG. 18;
  • FIG. 20 is a sectional view taken on line 20-20 of FIG. 18;
  • FIG. 21 is a sectional view taken on line 21-21 of FIG. 20;
  • FIG. 22 is a fragmentary front view of a display panel showing the positions of the closure member and its latch pin during the downward movement of the panel in its rear and downward portion of its path of movement;
  • FIG. 23 is a sectional view taken on line 23-23 of FIG. 22;
  • FIG. 24 is a sectional view taken on line 24-24 of FIG. 22;
  • FIG. 25 is a sectional view taken on line 25-25 of FIG. 24.
  • FIG. 26 is a block diagram of a control circuit for the display apparatus embodying the invention.
  • the display apparatus 30 embodying the invention includes a housing 31 having side walls 32 and 33, top and bottom walls 34 and 35, a rear wall 36 and a front wall 37.
  • the front wall is provided with a rectangular aperture or window 38 defined by the inwardly extending side portions 39 and inwardly convergent top and bottom portions 40 and 41 of the front wall.
  • the walls are secured, as by screws, to a rectangular support frame which includes horizontal angle members 42, 43, 44, and 45 extending between the housing side walls, a left rectangular frame 47 connected by welds, bolts or the like to the left ends of the angle members and a right rectangular frame 48 similarly connected to the right ends of the angle members.
  • a movable display assembly 50 is mounted between a pair of bearing plates 51 and 52 by means of a shaft 53.
  • the shaft 53 includes a tubular central section 55 having sprockets 56 and 57 rigidly secured to opposite ends thereof, as by welding, and outwardly extending end sections 58 and 59.
  • the end sections protrude through roller bearings 60, FIG. 8, secured in the bearing plates.
  • the bearing plates are rigidly affixed to the top angle members of the support frame in any suitable manner, as by screws 61, which extend through suitable apertures in the angle members into threaded bores in the bearing plates.
  • the display assembly 50 comprises a plurality of horizontal panels 62, connected by horizontal pivot shafts 63 whose ends project laterally outwardly of the extreme side panels and are provided with sleeves 64 of nylon or other suitable low friction substance.
  • the sprockets 56 and 57 have spaced radial arms 65 in whose outer recesses 66 are receivable the sleeves 64.
  • the sprockets are disposed in inwardly opening top recesses 67 (P16. 8) of left and right guide plates. 68 and 69, respectively.
  • These guide plates are spaced inwardly of the left and right walls of the housing and are rigidly secured to the angle members of the support frame by screws.
  • Each of the guide plates has front and rear vertical guide grooves or channels 71 and 72 which open at their lower ends to a lower internal recess 79.
  • the downwardly facing shoulders of the guide plates defining the lower recesses 77 provide arcuate guide surfaces along which the sleeves 64 may slide.
  • the upper ends of the guide channels of each guide plate open to the upper recess of the plate.
  • the drive shaft is rotated by an electric motor 80 having a speed reducing transmission whose output shaft 81 is connected to the left end section 59 of the shaft 53 by means of sprockets 82 and 84 and a belt 85 which extends about the sprockets, the belt having intemal teeth engageable by the sprocket teeth.
  • the assembly of the electric motor and speed reducing transmission is rigidly secured by bolts to a mount plate 86 which is rigidly secured to the left rectangular frame by means of bolts 87.
  • the panels 62 are connected by the pivot shafts to form an endless belt which travels in a closed path having a front portion A in which the panels move upwardly past the housing window, an upper portion B in which the panels move rearwardly, a rear portion C in which the panels move downwardly and a bottom portion D in which the panels move forwardly.
  • the outer sides of the panels located in the front portion A, except the lowermost panel in the front portion are visible to view through the housing window.
  • Each of the panel sections 90 includes an outer member 91 having a recess 92 in its inner surface whose upper and lower ends are defined by the downwardly and upwardly facing surfaces 93 and 94, respectively.
  • An inner member 95 is disposed in the recess 92 and is bonded or otherwise secured to the outer member 91.
  • An inner translucent light diffusing plate 97 is also disposed in the recess 92 inwardly of the inner member and is rigidly secured thereto, as by bonding, adhesive and the like while a similar diffusing plate 97a is secured to the other member.
  • the outer member 91 at their upper ends have tongues 101 and recesses or slots 102 at their lower ends, it being apparent that the tongue of each lower panel section 90 is received in the slot or recess 102 of an adjacent upper panel section.
  • the outer panel members are of course provided with horizontal passages 104 and 105 through their tongues and lower end portions through which the shafts 63 extends.
  • Each outer panel member 91 has outwardly facing upper horizontal and vertical side surfaces 107 and 108, respectively, and inwardly facing lower horizontal and vertical side surfaces 109 and 110, respectively.
  • the outwardly facing side surface 108 of one panel section 90 overlaps the inwardly facing side surface 1 10 of the immediately adjacent panel section and, similarly, the lower inwardly facing surface 109 of one panel section overlaps the upper outwardly facing surface 107 of the next panel section to which is connected by a shaft 63.
  • Each'panel section 90 has a group G of light passages formed by the apertures 116 and 117 of the outer and inner panel members 91 and 95, respectively.
  • the apertures of the panel members are somewhat cone shaped, i.e., decrease in diameter inwardly and open to internal recesses 118 in the inner side of the outer panel member.
  • Each recess 118 is defined by its substantially parallel upper and lower surfaces 121 and 122, respectively, of the outer member which extend angularly upwardly and to the right, FIG. 14, and arcuate upwardly and I n I 0. [15.1
  • the upper portion of the cavity is of larger size then the inner ends of the passages 116 and 117 so that the disc shaped closures 125 overlap the inner ends of the passages 116 and 117 when the closures are held in their upper operative positions, illustrated in FIGS. 14 through 17 of the drawings, by latch pins 127 slidably mounted in recesses 128 of the inner member 95 which open to the cavities 125.
  • the latch pin recesses 128 slope upwardly and away from the cavity, when the panel is in its front view portion of its path of movement so that the latch pins are biased by gravity downwardly and into the cavities and thus hold the closures in their upper operative positions.
  • the latch pin recesses 128 are disposed outwardly and to the left of the center of the longitudinal axis of the elongate cavities so that the closures each have an edge portion engaged and supported by the lower support surface 121 and an edge portion engaged with the latch pin.
  • any latch pins 127 which may have been in their inner operative positions supporting closures in their upper operative positions, as illustrated in FIG. 14 through 17, move by gravity downwardly into the latch pin recesses 128 since these extend angularly downwardly from the cavities 125 when the vertical position of the panel is reversed.
  • Any closure which were in their inoperative positions in the cavities also then drop by gravity to their positions, illustrated in FIGS. 22 through 25, wherein the closures engage the surfaces 122'and 124 of the outer member defining the recesses 118.
  • the latch pins slide inwardly into the cavities and the closures thereafter move back to their operative positions illustrated in FIGS. 14 through 17 wherein they are supported by the pins and the support surfaces 121.
  • a plurality of electromagnets 130 are mounted inwardly of the panels at the lower end portion of the vertical portion A of their path of movement by means of a support bar 131 which has end arms 132 rigidly secured to the guide plates 68 and 69.
  • the panels are designed to display alpha-numeric characters
  • passages of each group G of each panel section are arranged in plurality, for example, 5 vertical columns, C1, C2, C3, C4 and C5, and a plurality, for example, 11, horizontal rows Rl-Rl 1.
  • reflective strips 134 are mounted on one end panel.
  • a sensor assembly 135 mounted on a bracket 136 secured to the guide plate 68 includes a light bulb 137 and a photocathode 138.
  • the light bulb and the phototube are aligned horizontally and the light bulb directs a light beam at the reflective strips so that each time a row of the light passages 115, for example the row R1, begins to move upwardly and into alignment with the row of electromagnets, the reflection of the light of the lamp from the strips 134 causes the photocathode tube to provide a signal which will enable any of the electromagnets selected by a suitable control means, as will be explained later, to become energized.
  • the upper portion of the closure in its lower open position projects upwardly over the inner end of the recess 128 so that when the electromagnet is de-energized and the latch pin slides downwardly, its inner end will engage the upper side surface of the closure and will be prevented from moving into its fully inner position.
  • a plurality of elongate fluorescent lights 140 are mounted in the housing on a reflector wall 141 whose opposite ends are secured to the guide plates 68 and 69 by means of brackets 142.
  • the fluorescent lamps or tubes are mounted in the usual manner on fittings 143 which are secured in any suitable manner to the opposite side portions of the reflector wall.
  • the motor 80 is energized and rotates the drive shaft 53 in a clockwise direction (FIG. 4) thus moving such panel upwardly.
  • a signal is provided by the photocathode tube as the first reflective strip 134 at the first row R1 moves into alignment with the sensor assembly to a suitable control circuit which enables preselected ones of the electromagnets to be energized.
  • Such selected electromagnets are then energized for a short predetermined period of time to cause the latch pins of the preselected closures to be retracted to allow the closures to drop by gravity to their inoperative positions.
  • the photocathode tube again transmits an enabling signal and the latch pins of preselected closures closing the light passages in the row R2 of the light passages of such panel are moved to their retracted positions.
  • the electrom agnets are selectively actuated as each of the eleven rows of light passages of a panel moves into alignment and past the electromagnets so that when the panel moves to the position wherein its bottom rows R11 of light passages are above the bottom edge of the window, such panel is visible and presents a whole horizontal line of alpha-numeric characters since the light passes through the open light passages, light not being allowed to be transmitted through the other light passages which are closed by the closure members.
  • the panels are preferably opaque so that each open light passage is visible as a disc of light on the light diffusing plate. It will be apparent that the light may be of any desired color and that the panels themselves may 7 be black or any desired color.
  • Each panel 62 is held in its lowermost visible position by a braking and positioning assembly 150, (FIGS. 7, 8 and 9) at a desired location above the bottom edge of the window 38.
  • the assembly 150 includes a disc 151 rigidly mounted on the right end section 69 of the shaft 53 by a set screw 153.
  • the disc 151 is provided with four peripheral recesses 154a, 154b, 154s, and 154d in which is receivable the peripheral outer portion of a roller 156 rotatably carried intermediate the ends of a pivot bar 157.
  • the upper end of the pivot bar as viewed in FIG. 7, is pivotally secured by a suitable pin 158 to a slide plate 159.
  • the slide plate is affixed to the ,bearing plate 52 by bolts 160 which extend through vertical slots 161 in the slide plate into threaded bores in the plate 52.
  • An adjusting screw 163 is mounted on a strap 164 rigidly secured, as by welding, to the plate 52.
  • the screw extends into a threaded bore in the plate 159 and is held against vertical movement relative to the plate by a suitable split ring which is received in an external annular recess in the screw shank above the strap.
  • the pivot bar 157 is biased in a clockwise direction about the axis of the pin 158 by a spring 166.
  • One end of this spring extends about a bolt 167 secured to the lower end of the pivot bar, and the other end is hooked about a similar bolt 168 secured to the bearing plate 52.
  • the motor is de-energized just before the next recess 154a moves into alignment with the roller 156.
  • the momentum of the display assembly and its driving means continues the movement of the disc 151 until the roller 156 enters the recess 154a and the disc comes to rest.
  • the de-energization of the motor 80 is controlled by a sensor assembly 170 which includes a lamp 171 and a photocathode tube 172.
  • the lamp directs a beam of light through successive slots 173a173d (FIG. 27) in a position indicator disc 175 rigidly mounted on the left end portion of the shaft 53.
  • the sensor assembly is supported by a bracket 177 secured to the bearing plate 51.
  • the relative angular positions of the position indicator disc 175 and the positioning disc 151 on the shaft 53 are such that, as the shaft rotates in a clockwise manner, as viewed in FIG. 7, the slot 173a, for example, will move into alignment with the lamp and photocathode tube of the sensor assembly just before the recess 154a moves into alignment with the roller 159.
  • a voltage pulse is supplied to a suitable control circuit to de-energize the motor 80.
  • the square crosssectional shape of the central portion 55 of the shaft 53 causes the two topmost rows of panels to be supported not only by the sprockets but also by the top sides of the central portion. It is preferable that the shaft be provided with a resilient coating of nylon, polytetrafluoroethylene or the like to minimize noise and wear.
  • the display apparatus may be used to present such data as stock quotations, news items and the like which may be transmitted in serial digital form over teletype lines 180 to a control circuit 181 which decodes and stores each complete line of data in proper form for transmittal to the row of electromagnets 130.
  • the control circuit When a complete line of such information has been transmitted to the control circuit, the control circuit causes the motor 80 to be energized and, as the lowermost panel moves upwardly past the row of electromagnets 130 and as the reflective strip 134 of the eleven rows Rl-Rll movesuccessively past the photocathode 138, the control circuit causes selected ones of the electromagnets 130 to be energized, as determined by a suitable computer or digital logic circuit of the control circuit, as each row of light passages moves therepast so that such panel will then visually present such data.
  • the photocathode tube 172 sends a signal to the control circuit to stop operation of the motor 80. Thereafter the positioning assembly 150 ensures that such lowermost panel is in proper position above the bottom edge of the window 38. If the control circuit has in the meantime received another line of data to be presented visually by the next lowermost panel, the motor 80 will either be again energized or its de-energization will be prevented by the control circuit so that the presentation of the data may be almost continuous.
  • latch pins have been illustrated as being disposed above the central longitudinal axes of the cavities and a substantial distance from the lower surfaces defining the cavities, if desired, the latch pins could be located at lower positions, for example, at the locations of the central longitudinal axes of the cavities.
  • closures can be formed of any suitable non-magnetic substance, such as a plastic, brass or the like since the closures themselves are not moved by the electromagnets.
  • the light passages may be arranged with very small separations therebetween and that since only the latch pins, which may be tubular if desired, and are light in weight, are moved by the electromagnets to release the closures for movement from their upper positions in the cavities to their lower positions therein, the electromagnets themselves may be relatively small and require small currents for their operation.
  • a display device including: an elongate horizontally extending substantially vertical panel, said vertical panel having a plurality of substantially horizontal transverse light passages extending therethrough and a plurality of internal cavities intersecting said light passages; a closure member in each of said cavities and movable between an inoperative position wherein said closure is spaced from its associated light passage and closures to move from one of said operative or inoperative positions to the other as each one of said columns and rows of said light passages moves toward alignment with said electromagnets tocause the light transmitted through open light passages of said panel to present predetermined visual information.
  • control means includes a plurality of index means carried by said panel in predetermined relation to said one of said columns and rows of light passages to cause said control means to be placed in condition to enable said electromagnets to be energized only when said electromagnets are in predetermined aligned relation with said closures operatively associated with said one of said columns and rows of said light passages.
  • index means comprises light reflective means on said panel, light emitting means for directing light at said reflective means and a light responsive means for receiving the light reflected from said reflective means for producing a control signal.
  • closure member is moving means includes electromagnetic means operatively associated with said latch means, said latch means being of a magnetic substance.
  • said latch means being movably disposed in said recesses and being adapted to have their outer end portions engage said closures to hold said closures in said one of said positions.
  • cavities are of elongate configuration and extend angularly from the vertical, said panel having support surfaces defining the lower elongate sides of the cavities, said closures being engageable by said support surface.
  • said latch moving means includes electromagnetic means operatively associated with latch means, said latch means being of a magnetic substance.
  • said latch moving means comprises a plurality of electromagnets disposed in a horizontal row and substantially aligned with the columns of light passages of said display panels, said panels being mounted for upward vertical movement relative to said electromagnets.
  • control means operatively associated with said electromagnets for causing said electromagnets selectively to move the latch means of selected closures to release said selected closures for movement from said first to said second positions as each horizontal row of said light passages moves into alignment with said electromagnets to cause the light transmitted through open light passages to present pre-determined visual information.
  • control means includes a plurality of index means carried by said panel in predetermined relation to said rows of light passages of said panels to enable said electromagnets to be energized only when said electromagnets are in predetermined aligned relationship with said latch means.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electromagnetism (AREA)
  • Displays For Variable Information Using Movable Means (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US27790A 1970-04-13 1970-04-13 Display apparatus Expired - Lifetime US3685040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2779070A 1970-04-13 1970-04-13

Publications (1)

Publication Number Publication Date
US3685040A true US3685040A (en) 1972-08-15

Family

ID=21839800

Family Applications (1)

Application Number Title Priority Date Filing Date
US27790A Expired - Lifetime US3685040A (en) 1970-04-13 1970-04-13 Display apparatus

Country Status (4)

Country Link
US (1) US3685040A (de)
DE (1) DE2117868A1 (de)
FR (1) FR2086027B1 (de)
GB (1) GB1335130A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813673A (en) * 1972-06-26 1974-05-28 Trans Lux Corp Display panel
US4045895A (en) * 1976-07-26 1977-09-06 American Sign And Indicator Corporation Display sign
US4053340A (en) * 1976-07-26 1977-10-11 American Sign And Indicator Corporation Method for producing display sign panel
US4264906A (en) * 1978-05-23 1981-04-28 Yoshimasa Wakatake Display element and display panel employing such display elements
US6603457B1 (en) * 1999-06-23 2003-08-05 Canon Kabushiki Kaisha Display device with moving pixel members
US20090113772A1 (en) * 2004-10-12 2009-05-07 Arie Traupianski Visual elements array information display and road safety system
US20100060896A1 (en) * 2006-06-28 2010-03-11 Koninklijke Philips Electronics N.V. Method and apparatus for object learning and recognition based on optical parameters
US20100243180A1 (en) * 2009-03-24 2010-09-30 Charles Hoberman Panel assemblies having controllable surface properties
CN111710258A (zh) * 2020-07-15 2020-09-25 杭州艾普莱标识制造有限公司 一种可循环使用的标识牌

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112066220B (zh) * 2020-08-28 2022-04-26 宁波职业技术学院 一种基于视频事件检测器的事故发生监视提醒装置

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577609A (en) * 1924-04-30 1926-03-23 Rowland N Chubb Changeable sign
US2232167A (en) * 1938-04-11 1941-02-18 Barber Colman Co Permutation keyboard mechanism
US3199098A (en) * 1963-02-14 1965-08-03 Samuel A Schwartz Display apparatus having spheres mounted on rods
US3250031A (en) * 1963-02-12 1966-05-10 Richard G Bowman Display unit for scoreboards or the like
US3267595A (en) * 1963-06-05 1966-08-23 Levy Display unit
US3304549A (en) * 1964-06-01 1967-02-14 Electronix Ten Inc Composite signalling device
US3460276A (en) * 1968-09-16 1969-08-12 Peripheral Data Machines Inc Bistable visual display device
US3486258A (en) * 1967-12-06 1969-12-30 Contraves Ag Movable display arrangement
US3487568A (en) * 1967-06-09 1970-01-06 Robert L Woolfolk Display apparatus
US3562938A (en) * 1967-09-27 1971-02-16 Universal Telewriters Pty Ltd Information display devices
US3601914A (en) * 1969-08-14 1971-08-31 Science Associates Inc Display apparatus
US3624647A (en) * 1969-12-04 1971-11-30 Ferranti Packard Ltd Translatable display sign

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577609A (en) * 1924-04-30 1926-03-23 Rowland N Chubb Changeable sign
US2232167A (en) * 1938-04-11 1941-02-18 Barber Colman Co Permutation keyboard mechanism
US3250031A (en) * 1963-02-12 1966-05-10 Richard G Bowman Display unit for scoreboards or the like
US3199098A (en) * 1963-02-14 1965-08-03 Samuel A Schwartz Display apparatus having spheres mounted on rods
US3267595A (en) * 1963-06-05 1966-08-23 Levy Display unit
US3304549A (en) * 1964-06-01 1967-02-14 Electronix Ten Inc Composite signalling device
US3487568A (en) * 1967-06-09 1970-01-06 Robert L Woolfolk Display apparatus
US3562938A (en) * 1967-09-27 1971-02-16 Universal Telewriters Pty Ltd Information display devices
US3486258A (en) * 1967-12-06 1969-12-30 Contraves Ag Movable display arrangement
US3460276A (en) * 1968-09-16 1969-08-12 Peripheral Data Machines Inc Bistable visual display device
US3601914A (en) * 1969-08-14 1971-08-31 Science Associates Inc Display apparatus
US3624647A (en) * 1969-12-04 1971-11-30 Ferranti Packard Ltd Translatable display sign

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813673A (en) * 1972-06-26 1974-05-28 Trans Lux Corp Display panel
US4045895A (en) * 1976-07-26 1977-09-06 American Sign And Indicator Corporation Display sign
US4053340A (en) * 1976-07-26 1977-10-11 American Sign And Indicator Corporation Method for producing display sign panel
US4264906A (en) * 1978-05-23 1981-04-28 Yoshimasa Wakatake Display element and display panel employing such display elements
US6603457B1 (en) * 1999-06-23 2003-08-05 Canon Kabushiki Kaisha Display device with moving pixel members
US20090113772A1 (en) * 2004-10-12 2009-05-07 Arie Traupianski Visual elements array information display and road safety system
US20100060896A1 (en) * 2006-06-28 2010-03-11 Koninklijke Philips Electronics N.V. Method and apparatus for object learning and recognition based on optical parameters
US8237685B2 (en) * 2006-06-28 2012-08-07 Koninklijke Philips Electronics N.V. Method and apparatus for object learning and recognition based on optical parameters
US20100243180A1 (en) * 2009-03-24 2010-09-30 Charles Hoberman Panel assemblies having controllable surface properties
US8615970B2 (en) * 2009-03-24 2013-12-31 Charles Hoberman Panel assemblies having controllable surface properties
CN111710258A (zh) * 2020-07-15 2020-09-25 杭州艾普莱标识制造有限公司 一种可循环使用的标识牌

Also Published As

Publication number Publication date
FR2086027A1 (de) 1971-12-31
FR2086027B1 (de) 1973-06-08
DE2117868A1 (de) 1971-10-28
GB1335130A (en) 1973-10-24

Similar Documents

Publication Publication Date Title
US3685040A (en) Display apparatus
US2507909A (en) Advertising display
US6170971B1 (en) Indicating light display having several light sources
US4761905A (en) Scanned electromechanical display
US3388490A (en) Sign with colored fluid
US4417412A (en) Fiber optic display device
US3694062A (en) Stroboscopic display
US2707346A (en) Illuminated translucent signs
US3601914A (en) Display apparatus
CA1168772A (en) Display panel and display elements therefor
US3747243A (en) Advertising device with flickering light effect
US3399476A (en) Animated sign
CA1109573A (en) Display panel and display elements therefor
US3205598A (en) Devices for the production of multiple images
NL192699C (nl) Geldspeelautomaat met steeds gemeenschappelijk roterende en stilstaande winstsymboolreeksen.
US2645047A (en) Flashing illuminated sign
US3659366A (en) Display apparatus
EP0511369B1 (de) Anzeigevorrichtung für aufeinanderfolgende graphische bilder
US3487568A (en) Display apparatus
US2297907A (en) Illuminated cabinet
US5996263A (en) Internally illuminated matrix sign
US3590509A (en) Light-reflective display device
US1914562A (en) Advertising device
US2132476A (en) Combination mirror and clock
US3624647A (en) Translatable display sign