US3281820A - Movable display member controlled by impedance elements mounted on said member - Google Patents

Movable display member controlled by impedance elements mounted on said member Download PDF

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Publication number
US3281820A
US3281820A US172427A US17242762A US3281820A US 3281820 A US3281820 A US 3281820A US 172427 A US172427 A US 172427A US 17242762 A US17242762 A US 17242762A US 3281820 A US3281820 A US 3281820A
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US
United States
Prior art keywords
graphic
display
code
representations
binary
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
US172427A
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English (en)
Inventor
Jr Herbert E Snider
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.)
TDK Micronas GmbH
International Telephone and Telegraph Corp
Original Assignee
Deutsche ITT Industries GmbH
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
Priority to BE628283D priority Critical patent/BE628283A/xx
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to US172427A priority patent/US3281820A/en
Priority to CH171263A priority patent/CH379973A/de
Application granted granted Critical
Publication of US3281820A publication Critical patent/US3281820A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/045—Selecting complete characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F11/00—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position
    • G09F11/24—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies
    • G09F11/26—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies of an endless band
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F11/00—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position
    • G09F11/24—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies
    • G09F11/26—Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position the advertising or display material forming part of a moving band, e.g. in the form of perforations, prints, or transparencies of an endless band
    • G09F11/28—Electric control therefor

Definitions

  • magnetic-code representations have been tried which require movement of a magnetically coded graphic record member relative to a magnetic sensing head at a predetermined speed for generating the required electrical output signals.
  • the magnetic representations need not obscure the graphic records, the requirement of movement poses a severe design problem.
  • Another object is to provide a display arrangement having the foregoing attributes, which is more sensitive than hitherto available devices.
  • a feature of my invention resides in the provision of a housing in which is located a signalling unit including a plurality of electrical-signal-translating network-s each having a reactive load therein.
  • the said reactive loads are all of similar composition and construction, and they are arranged to coact with corresponding code-digit regions, of variably determined composition, in a graphic record memher, so as to present different impedances to applied electrical signals Whichare thus variably translated through the associated networks.
  • the output signals appearing at the said reactive loads differ from the applied 3,281,820 Patented Oct. 25, 1966 electrical input signal in accordance with code representations on the graphic record member, this being accomplished without contact between the signalling unit and the record member, and without the necessity for relative movement therebetween.
  • the resulting arrangement is highly reliable, durable, compact, and rugged in construction.
  • Another feature of my invention involves the use of a graphic record member, such as an endles belt, which includes a closed surface of a given length, along which the graphic items of intelligence are distributed at equal intervals covering the entire length of the surface, and wherein the code representations assigned to graphic items which are spaced apart by one half of the total length of the said surface, are binary complements of each other.
  • the code signalling unit is arranged to sense simultaneously the code representations at points one half of the said surface length apart, so that the differences between binary one and Zero output signals which are derived through the reactive loads in the signal-translating networks in the above-mentioned signalling unit are twice as great as the differences which would otherwise be obtained.
  • FIG. 1 is a view in perspective of a display device in accordance with the present invention, with a portion thereof broken away to reveal the internal arrangement of parts therein.
  • FIG. 2 is a diagrammatic view in elevation of a portion of the inner surface of the graphic display record member employed in the apparatus of FIG. 1.
  • FIG. 3 is a schematic block diagram illustrating the general arrangement of a signalling unit, in accordance with my invention.
  • FIG. 4 is a schematic drawing illustrating the circuit details of a typical one of the signal-translating network channels indicated in FIG. 3.
  • FIG. 5 is a diagrammatic view of a preferred arrangement for varying both of the reactive elements shown in the bridge circuit of FIG. 4 in complementary fashion so as to provide a greater dilference in amplitude between binary one and zero signals translated through said circuit.
  • a display accord ing to my invention comprises a housing 1 having a protective transparent cover plate 2 fastened thereto.
  • Plate 2 covers a row of display apertures 3 through which graphically recorded intelligence may be viewed.
  • symbols and/ or characters, which are to be displayed in the apertures 3 are disposed on the outer closed surfaces of endless belt members, such as the member 4 which is shown in the broken-away view through the housing.
  • endless belt members are shown, those skilled in the art will immediately appreciate that, in many instances, the corresponding display function could also be provided by disc-type members and the like.
  • the images which are to be displayed are located at given intervals along the outer surface of each belt.
  • the given intervals are all equal, and they cover the entire length of the said outer surface. I find it advantageous to allot one of these intervals to a blank, or empty, display region, so that any one of the belts may be conveniently omitted from the combined row dis-play. I further find it convenient to position the belts so that they convey the recorded graphic images across the associated apertures in a direction parallel to the row of apertures, so that a slight irregularity in the positioning of any individual image in the row only affects the lateral spacing between that image and the ad- Q jacent ones, without vertical misalignment of the said images, the latter having a more noticeable and disagreeable visual effect.
  • FIG. 1 In the exemplary arrangement of FIG. 1, seven apertures are provided, which, viewed from left to right in the particular illustration, are displaying the combination of symbols NWK-39, the darkened areas representing the above mentioned blank display intervals.
  • This arrangement may thus be used to represent, for example, an airline announcement of the departure of flight 39 from or for Newark Airport.
  • Each of the graphic display record members 4 is driven by a corresponding shaft 5 over corresponding rollers, not shown, in the vicinity of the associated aperture 3.
  • the belts are coupled to the shaft 5 and are driven thereby, by means of sprocket holes 6 which are engaged by suitable sprocket projections on the shafts 5.
  • Each shaft 5 is discretely positioned by means of a stepping servo motor which is located either to the rear of the shafts or within the enclosures defined by the record members 4, but which is not shown in FIG. 1 in order to avoid complication of the drawing with unessenti-al details.
  • Each stepping servo motor is coupled to the shaft 5 by means of a coupling belt or gear which, again for the sake of simplicity, is not shown in the drawing, as such arrangements are well known to those skilled in the art.
  • Suitable miniature stepping servo motors for this purpose and associated driving arrangements therefor, are disclosed for example, in an article entitled Stepper Motors May Someday Replace AC. and DC. Servo Motors, in the September 1960 issue of Electro-mechanical Design, pages 39 10, and also in Bulletin (brochure) 412 of American Electronics Inc., entitled Logic Stepper Controls.
  • a signalling unit 10 is positioned preferably within the belt enclosure to coact with special material on the surface of the record member 4, so as to provide electrical code output signals representative of the intelligence being visually displayed in the associated aperture 3, for each discrete display position of the record member in the novel manner described below.
  • each of the graphic record members 4 preferably contains overlying graphic and coded representations located respectively on the outer and inner surfaces of the belt 4, as indicated in the region 19.
  • a graphic record indicated in clotted outline at 20 is the letter U while the coded representation in the present instance is a binary-code representation which is used to represent the letter N. This is done to indicate that the graphic symbol being displayed is the letter N, although the graphic symbol adjacent the signalling unit 10 is the character U.
  • the binary-code representation includes, in this particular instance, three binary-digit areas as indicated at 21 in which the surface material is the same as in the adjacent areas of the member 4, and three other binary-code-digit areas indicated at 22 in which the composition of the surface material is altered by crneans of a coating of different composition, or the like, as further explained below.
  • These code-digit areas affect the impedances of corresponding reactive elements in the sensing unit 10 to provide thereby dynamically vary ing electrical code signals in a manner discussed below.
  • the combination of the areas 21 and 22 taken in sequence from left to right, top row first and then bottom row, represents the combination of binary digits 010101, which combination as indicated in the figure is assigned to the letter N.
  • a signalling unit 10 which cooperates with the coded representations on the belt member 4 is shown.
  • Such a unit generally comprises an input terminal 30 and six output terminals 31-36 between which are respectively connected signal-translating networks 4146.
  • a fluctuating electrical signal either in the form of a pulsed or alternating current is applied through terminal 30 to the individual net- 4 Works 41-46.
  • the resultant signals are altered in accordance with the respective binary-digit impedance coupling between the said networks and the belt member 4 as described below.
  • Each of the networks 41-46 preferably comprises a bridge circuit including parallel circuit paths connected between a pair of terminals 30 to which the aforementioned fluctuating signal is applied.
  • Each of these parallel circuit paths in the present instance preferably consists of a series reactance and resistance, and the circuit output is taken across the junctions of the series reactances and resistances.
  • the network 41 shown by way of example, includes the series combination of a reactance X1 and resistance R1 connected in parallel with the series combination of a reactance X2 and resistance R2 across the input terminals 30.
  • the output terminals 31 of network 41 are connected between the respective junctions of the aforesaid reactances and resistances, one of the output terminals being grounded for convenience as indicated at 50.
  • a pulse signal applied to terminal 30 is transferred to all six networks 41-46, while either one or both of the bridge reactances, which are located adjacent the surface of the member 4, are varied in accordance with the composition of the surface material in corresponding digit regions of the member 4, as indicated in FIG. 2, in a manner to be discussed in detail below.
  • the reactances X1 and X2 may either be inductive or capacitive type reactances, and the different material in the regions 22 of the member 4 will accordingly differ in magnetic permeability or dielectric constant, respectively, from the surrounding composition of the member 4.
  • the reactances X1 and X2 are taken to be inductive reactances, and both are used in the determination of the bridge output as follows.
  • the digit-sensing reactive elements X1 and X2 in the preferred arrangement communicate with the interior surfaces of the belt 4 at points spaced apart one half of the total length (L) of the belt 4.
  • the elements X1 and X2 respectively comprise inductors, 61 and 62, which are respectively wound on partial magnetic core members, 63 and 64, which are generally C- shaped members having their open portions adjacent corresponding digit areas of the belt 4 at a distance /2L apart.
  • each pair of members e.g. 63 and 64, are facing corresponding digit regions of complementary code representations.
  • the complementary representation is the representation 101010 (which may, for example, constitute the representation of a graphic image displaced /2L from the image N), and if, for example, the element X1 were positioned opposite the first digit of the representation for N, namely, 0, then the elements X2 would be positioned adjacent the first digit of the complementary representation, namely, 1.
  • the code digit to be electrically transmitted to the output terminal 31 is to be a representation of binary 1
  • the normally magnetically unpermeable tape 4 would be coated with a magnetically permeable material in the region facing the member 63, while in the region facing the member 64 no magnetically permeable coating would be provided, so that the resultant effect on the bridge circuit network 41 will be a variation in the impedance of the element X1, with no variation in that of element X2.
  • the magnetically permeable coating would appear adjacent the member 64, completing the associated magnetic circuit, while the magnetic circuit associated with the member 63 would remain incomplete, and therefore the bridge circuit leg containing the element X2 would be varied while that containing the element X1 would remain unaltered.
  • the difference between a binary 1 and a binary output signal is twice as great, since if the applied input signal is, for example, a positive-going pulse at the upper terminal 30 in relation to the lower terminal 36, then for a binary 1 condition on the belt 4, the self inductance of X1 is greater than the self inductance of X2, and the potential drop across inductive reactance X1 is therefore greater than that across inductive reactance X2 during the pulse, so that the potential at the ungrounded terminal 31 is relatively negative-going with respect to the grounded terminal. For the same reasons, under binary O conditions an input pulse will be translated as a relatively positive-going pulse at the ungrounded terminal 31 relative to ground.
  • the electrical representation produced by the signalling unit is preferably that associated with the graphic item of intelligence which is being displayed in the aperture 3, which item is not necessarily the same as that overlying the magnetic code representation adjacent the signalling unit.
  • an analogous reactive arrangement could also be used in which, for the elements X1 and X2, conductive plates are used, and in which the material on tape 4 is a dielectric which is backed by a conductive plate connected to one of the terminals 31 of FIG. 4, so that the combination then represents a capacitor, and the binary 1 areas may then be embossed areas of dielectric volume which provide corresponding increases in the capacitance between the aforementioned plates, whereby the output signals obtained therefrom are correspondingly varied in accordance with the value of a binary-code digit.
  • a display device comprising:
  • a signalling unit mounted within said housing including first and second sets of electrical signal translating networks having reactive loads therein of the same composition and construction, the reactances of which loads vary in a predetermined manner when the said loads are positioned near material of a given composition;
  • a graphic-display record member mounted within said housing for movement in relation to said display region and said signalling unit, said member having corresponding graphic and code representations recorded thereon, which are respectively movable adjacent said display region and said unit, to determine simultaneously a static graphic display and a corresponding set of dynamic electrical output signals, the said member including a closed surface along which the said graphic representations are uniformly distributed at equal intervals, and further along which the said code representations are distributed at the same equal intervals,
  • each said recorded code representations comprising a set of elemental binary code digit regions in which the different binary code digit values are represented respectively by the presence or absence of said material of a given composition, said representations having first and second regions spaced apart by one-half the total length of said closed surface and being binary complements of each other, said representations being operative statically to vary the reactances of corresponding ones of said reactive loads in said first and second sets of electrical signal translating networks of the signalling unit when the corresponding graphic representations are adjacent said display region, whereby electrical signals transferred through said reactive loads may be altered in accordance with the code representations of said displayed graphic representations.
  • a device in which (a) one of said intervals is allotted to a blank graphic display representation.
  • a device including a plurality of members according to claim 1 in which (a) the said graphic representations on said members in said display region are aligned in a row, and
  • a device in which (a) the said movement of said member is limited to discrete incremental displacements corresponding to the spacings between successive ones of said graphic representations.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
US172427A 1962-02-12 1962-02-12 Movable display member controlled by impedance elements mounted on said member Expired - Lifetime US3281820A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE628283D BE628283A (US07655688-20100202-C00010.png) 1962-02-12
US172427A US3281820A (en) 1962-02-12 1962-02-12 Movable display member controlled by impedance elements mounted on said member
CH171263A CH379973A (de) 1962-02-12 1963-02-12 Vorrichtung zum statisch graphischen Anzeigen von Informationen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US172427A US3281820A (en) 1962-02-12 1962-02-12 Movable display member controlled by impedance elements mounted on said member

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US3281820A true US3281820A (en) 1966-10-25

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US (1) US3281820A (US07655688-20100202-C00010.png)
BE (1) BE628283A (US07655688-20100202-C00010.png)
CH (1) CH379973A (US07655688-20100202-C00010.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386088A (en) * 1964-12-01 1968-05-28 Litton Systems Inc Display device
US3400387A (en) * 1964-12-04 1968-09-03 Raytheon Co Stroboscopic display device with rotatable drum having characters in staggered columns
US3634848A (en) * 1969-03-06 1972-01-11 Bendix Corp Optically digitized transmission dual tape overlay display apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2073066A (en) * 1936-03-09 1937-03-09 George J Kalberer Caster
US2784392A (en) * 1952-02-07 1957-03-05 Bull Sa Machines Data recording system
US2897267A (en) * 1953-05-08 1959-07-28 David C Prince Recording and translating of intelligence
US2955277A (en) * 1958-06-18 1960-10-04 Ibm Method of and apparatus for recording
US3003143A (en) * 1959-05-28 1961-10-03 Bell Telephone Labor Inc Selecting circuit
US3197765A (en) * 1961-07-07 1965-07-27 General Precision Systems Ltd Electromagnetic indicators or readout devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2073066A (en) * 1936-03-09 1937-03-09 George J Kalberer Caster
US2784392A (en) * 1952-02-07 1957-03-05 Bull Sa Machines Data recording system
US2897267A (en) * 1953-05-08 1959-07-28 David C Prince Recording and translating of intelligence
US2955277A (en) * 1958-06-18 1960-10-04 Ibm Method of and apparatus for recording
US3003143A (en) * 1959-05-28 1961-10-03 Bell Telephone Labor Inc Selecting circuit
US3197765A (en) * 1961-07-07 1965-07-27 General Precision Systems Ltd Electromagnetic indicators or readout devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386088A (en) * 1964-12-01 1968-05-28 Litton Systems Inc Display device
US3400387A (en) * 1964-12-04 1968-09-03 Raytheon Co Stroboscopic display device with rotatable drum having characters in staggered columns
US3634848A (en) * 1969-03-06 1972-01-11 Bendix Corp Optically digitized transmission dual tape overlay display apparatus

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Publication number Publication date
CH379973A (de) 1964-07-15
BE628283A (US07655688-20100202-C00010.png)

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