US2386743A - Communication and posting system - Google Patents

Communication and posting system Download PDF

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Publication number
US2386743A
US2386743A US518370A US51837044A US2386743A US 2386743 A US2386743 A US 2386743A US 518370 A US518370 A US 518370A US 51837044 A US51837044 A US 51837044A US 2386743 A US2386743 A US 2386743A
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United States
Prior art keywords
relay
relays
cable
conductor
row
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Expired - Lifetime
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US518370A
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English (en)
Inventor
Harold F May
Joseph C Marshall
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Teleregister Corp
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Teleregister Corp
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Priority to BE466036D priority Critical patent/BE466036A/xx
Application filed by Teleregister Corp filed Critical Teleregister Corp
Priority to US518370A priority patent/US2386743A/en
Priority to GB3813/45A priority patent/GB600743A/en
Priority to CH256708D priority patent/CH256708A/fr
Application granted granted Critical
Publication of US2386743A publication Critical patent/US2386743A/en
Priority to FR941633D priority patent/FR941633A/fr
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G5/00—Traffic control systems for aircraft
    • G08G5/20—Arrangements for acquiring, generating, sharing or displaying traffic information
    • G08G5/26—Transmission of traffic-related information between aircraft and ground stations
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G5/00—Traffic control systems for aircraft
    • G08G5/20—Arrangements for acquiring, generating, sharing or displaying traffic information
    • G08G5/22—Arrangements for acquiring, generating, sharing or displaying traffic information located on the ground
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G5/00—Traffic control systems for aircraft
    • G08G5/50—Navigation or guidance aids
    • G08G5/56—Navigation or guidance aids for two or more aircraft
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1804—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for stock exchange and similar applications

Definitions

  • FIG. 9 (D u) (D DATA (UNITS) INTERMEDIATE Rows oI TO Ia n I 2 ND DIGIT IDENTIFICATION IST DIGIT IDENTIFICATION To F'G' 3 ⁇ - INvEN'roRS 0 I-I.
  • This invention relates generally to communication and posting systems for displaying information or data in regard to anumber of' different items by means of groups. or rows of indi'- cators which are automatically and selectively actuatable or settable in response to incoming signals to display information or current changes provement over the communications and postingv system disclosed in the patent to J. C. Marshall and M. L. Haselton, No. 2,246,449, issued' June 17, 1941.
  • the information thus posted on, the bulletin ,or announcing board usually relates to numerous nights, and the items posted usually are arranged in groups according to thavarious marker or Fix classifications, as explained in the aforesaid Marshall et al. patent., and preferably are arranged within yeach group in accordance with the expected or estimated time yof passage, or arrival of the, aircraft at the various recording or marker. points en route and at the airport.
  • the nightdata yposted may have to. be changed from time toA time during the progress of the ights as the result of conditions affecting the progress of aircraft, such as poor visibility, ice, changes in the direction and velocity ofthe Wind, the necessity for blind landings, andY other emergency conditions.
  • the information posted may comprise numerous data, such as the night designation symbols followed by a section number, if any; information as to the direction of the various flights; the airway traic controllers estimated time when the aircraft Will pass over or land at, certain marker points on the flight route; the timethe aircraft actually passes over or lands. at each marker point; the expected approach time when the pilot may receive instructions to start his;
  • An additional. object is animproyodarranseapproach to @landing field; proposed altitudes at wliilcba clearance has been issued to cross cach marker or flight path; the altitude, at which the aircraft actually crosses the various markers ,f and the. landins sequence number 'assigned' totalidinss under instrument conditions.
  • other information may bc posted outheiiieht progress display boards. Such for example. as an indication that a clearance through a marker or fix has.
  • Another obioct is avpostnsor announcing, systemi andparticuatly a System. adapted ,for flight control.. which. utilizes Ytwo Aboards baring indicators carrying substantiallytbo information. or on which certain ,information is duplicated, .one of which boards arccord board in which .the flights or otheritems may be recordedand posted vrandom orderand the other an anf noiincins or display .board in which the-various flights or other vitems may be displayedand maintained in any-desired sorial .crd'er or Scduenoe. f l i i Still another Objectis the, provision of means operable at.
  • Adisplay board may simultaneously or concurrently berewiitten by a multiple. rovyseqlldllng operationment whereby the order in which the items are displayed on the display board may readily be changed at will in accordance with a predetermined chronological sequence.
  • Another object is a system in which the positions of the items displayed on the display board respectively are determined by the settings of new position posting units associated with each row of indicators in the record board.
  • a further object is improved flight or item 1ocator apparatus in which all flight or item identification storage devices are compared simultaneously with the identification data' of signals incoming to the locator apparatus.
  • Still another object is a system of the character described in which the information recorded in the record board may automatically be transferred to the display board without affecting or changing the settings of the recording devices in the record board, whereby the record board provides a convenient means for checking the accuracy of the information displayed at any time by the display board.
  • An additional object is means for recording the present location of the nights or other items posted on the display board and recording means concurrently operative for preselecting the new positions to which the information on the display board may subsequently be transferred.
  • Still another object ⁇ is means for taking the information stored in the record board in a sequence determined by the new position recording devices and temporarily storing the same, and subsequently resetting a multiplicity of rows of indicationg devices concurrently or simultaneously in the display board, to minimize interference with the displayed record.
  • Fig. 1 is a view, in diagrammatic form, of certain transmitting and receiving apparatus including seeker mechanism suitable for use with the system of the invention;
  • Fig. 2 shows a local-keyset in diagrammatic form adapted for use with the system
  • Fig. 3 showsvarious selecting, distributing and indicator pulsing apparatus, togetherv with new position recording indicators associated with rows lll to I 4 of indicators of the record board;
  • Fig. 4 is a view of other distributor apparatus, together with new position recording indicators associated with row of indicators in the record board, andnew position code translating relays andsequence collection switching apparatus;
  • Fig. 5 represents diagrammatically, a plurality of rows-00 to I 4 of indicators in the display board
  • Fig. 6 shows flight identification and data storage relays and present position recording relays, togetherrwith indicators for recording the Fix and flight number information in rows 0I to I4 in the record board; Y
  • Fig. 7 shows flight identification code translating relay apparatus and certain selection and sequence apparatus employed
  • Fig. 8 illustrates a distributor andassociated relays employed for sequencing the items posted on the display board
  • Fig. 9 shows diagrammatically various data recording indicators employed in the record board
  • FIG. 10 shows various storage relays employed in connection with the sequencing operations
  • data in regard to the movements of a, number of aircraft within a given area of a terminal or other flight control zone are recorded, and preferably are visually posted, on a record board, shown in the upper right hand portion of Fig. 13, and are displayed in predetermined sequence on the display board shown in the lower right hand portion of the figure.
  • Rotatable indicators which are arranged in horizontal rows,
  • Each row of indicators is identified with a certain flight and is adapted to display the fiight identification number and flight information or data, for example, the time at which the aircraft passes or reaches a particular location or marker point, referred to in the art as a Fix, and the altitude of the aircraft at the various Fix points, and also any additional information which it may be desired to record or post on the record and display boards.
  • both the record board and the flight progress display board may be located at an air trafc control center, such as an airport, where the fiights terminate or traverse a predetermined area associated with or controlled by the airport, and are posted on the display board Vby means of indicators so as to be visible at all times to the airway traffic personnel or others interested in the progress of the nights thus posted.
  • a local keyboard and mechanism associated therewith is provided for initially setting up on the record board, and if desired, on the display board, information such ⁇ as the flight designations, and the estimated time ,and altitude and other data in regard to the various aircraft at the several fixes or marker points, the keyboard also serving to initiate multiple row sequencing of the display board to enable rearrangement of the order or sequence in which the flights are displayed.
  • the signals incoming from the various places for posting the record board and the display l board may be of any suitable type.
  • permutation code signals for example, fiveunit code signals, are employed, which signals may be initiated either at the station IDI, Fig. 1, and transmitted by wire or line LI to the receiving equipment, or the signals may be transmitted by radio transmitting apparatus, such as teleprinters situated in the aircraft, while the aircraft is in flight and thus transmit signals which are received by radio apparatus, Fig. 1, situated at any suitable location.
  • radio transmitting apparatus such as teleprinters situated in the aircraft, while the aircraft is in flight and thus transmit signals which are received by radio apparatus, Fig. 1, situated at any suitable location.
  • Such radio receiving apparatus may comprise audio frequency filters,
  • Philadelphia which is designated as yFix 1
  • Washington Airport information in regard to a flight identied as No.. 34, which is passing over the Philadelphia x at 1:35 p.v rn. at analtitude of 4590 feet.
  • This information will be received and printed on the multiplex printer MP, Fig. l, and alsoposted on the record board and display board, Fig. 13, at the Washington Airport.
  • the operator at station-Ilrat Fix l actuates the keys of his -teleprinter keyboard and sends numerical and functional "characters comprising the message inthe following order: 3 4,1 3 3 5 vspace space 3 4 124 -and'end-of-message.
  • rst twocharacters Sand 4 represent the flight identication'number 34, the-thirdcharacter 1 the x selecting number corresponding toy Philadelphia, the fourth character 3-is the vrange or selecting signal for the time postingindicators, the fth and sixth characters 3 and 5 are the -tens and units digits, respectively, of the time, .and the'two spacing signals are interposed between the rst land second part of the'message transmitted.
  • The'characters 3 and 4 following thesecond'space signal again represent the night identification number. and digit l.
  • the keyboard yprinter Ill! may be any of the well-known typcssucl'i as shown in the Martin et al. Patent 1,745,633 or in tl'le-NoxonV etal.'Pat- These start-stop printers send and also record the transmitted signals on a tape, which signals are composed of markingy and spacing'units comprising a start impulse followed by a permuted group of ve marking and spacing impulses in various combinations lrepresenting the character transmitted, each group being terminated by a Arest impulse which,r is. off Yopposite line. condition to that ,ofy the start impulse.
  • The-operation of the ightidentica-tion keys causes a start impulse to be -applied to-thedi-ne L, thereby setting the ⁇ receiving 5 -distributor Idil-into operation. This impulsey is followed by the code signal for the number 3 -followed-.bya rest-impulse.
  • distributorlil causesY thecodeunits of the signal vreceived --to -be Vtransmitted overy ve conductors to a reperfora-tor IS7, a sixth conductor- 6' ofthe group serving tofoperate ythey punch magnet of the reperto-raton
  • the reperforator perforates 'the tapel issuing ltherefrom inv accordance with ⁇ the-.signalsreceived, -and steps the tape ahead into position -forthenext succeeding perfor-'ating operation corresponding tothe second digit of theflig-ht identification number.
  • any of-various known types of perforators may be employed, for example, as disclosed in the patent to Hoover v2,252;.-85/I oreaprinter reperforatory such 4as disclosed in the Dirkesat'faLPatent 2,193,809. Since theipermutation-signal forv the vdigit 3vhas-the code unit tion-ly marking ⁇ in character, conductor fI, .has-.marking .potential applied thereto and thev rremaining conductors-2 to.5 have spacing -ornocurrentcondition applied thereto, thereby caus- Ving a ⁇ singleperforation to be made in the-tape l ⁇ at this time ⁇ corresponding to the numeral-1.
  • the conductors I to 5 are connected by means 30.0f a, cable IIDIto the windings of four end-of- -message relays EMI to-.ElVIAY of the-,group B, the conducto-rs Land 2 ofcable IIB being connected to 4th'e left. hand and vinner- .operating windings, respectively, of relay-EMI, ⁇ and conductors 3,4 and 5 -of ythe cablelare connected to the operating windings 4of relays EM2, Y EMB andEM, respectively. .
  • the application of ra marking signal to conductor. Lof the cable.
  • relay VEMI causes relay VEMI to'op- .erate over a circuit fromA ground at itsleft hand 40winding.to marking battery appliedtothe conductortbythe.distributor H14.
  • lThe cperationof relay-EMI is-witnout'eiect atth'is time, the ren lay releasingupon the .subsequent operation' of 'the sixth pulse relay.
  • Conductor I2I also extends, through a conductor
  • relay L at its armature
  • Conductor 6 is connected to the evennumbered segments 2, 4, 6, 8, I0 and I2 of the segmented ring I I of distributor DRI.
  • Relay TC, Fig. 1 locks from grounded battery through its lower winding and contacts 1, and conductor I4I to the middle break contact 302 and armature 3300i release relay REL, Fig. 3, to ground.
  • This relay locks over a circuit from ground at its winding through its make contact and armature 603, conductor 60
  • the arrangement of relays and armatures in the 2nd digit identification storage relay group, and also in the x group, is th'e same as that in the 1st digit identiiication group shown, except that there is no blank lead BL in cable 601 connected to the armatures of the x relay groups.
  • the brushes of distributor DRI as they advance, next contact segment 2 of ring II, and the brush b5 completes a circuit from grounded battery on segment 2 of ring I2, through the brush and segment 2 of ring
  • the brushes thereof close circuits to segments 4 of rings I, 3, 5, 1 and 9 connecting the 2nd digit identification relays, shown in Fig. 6, to the tongues of the tape trans- .).1 mitte-r TTRI, Fig. l, in a manner similar to that of the preceding character, thereby actuating the relays in the second digit identiiication group in accordance with the code for the digit 4.
  • Each horizontal row of the record board Icon tainsstorage orrecording units NPT, NP U, ⁇ F, IT, IU, ⁇ TT, TU, AT, AU, the upper row I4 of which is shown in V,Figs. 3, 6 and 9.'
  • these-are recording inf.v dicators Yof vthe type disclosed inV Haselton et al..v Patent No. 2,155,825, issued April., 25, 1939- SuCh indicators are providedv with' a set of equally spacedl contacts corresponding in number Vto the.
  • the wiper arm is attached to the indicator drum assembly and engagesthe contacts of theindicator in accordance withthe instant setting of the drum; vvfor example, if the drum is set to display the digit 1, the wiper will be in engagement with contact I; similarly,
  • the ITC relay will also operate, but since the selection of a given row depends' upon -an exact match inzall three indicator positions IT, IU and. F, a complete circuit can .only be established in the row assigned to that ilight.
  • the 2nd digit identication storage relays of Fig. 6 will apply ground .to conductor S in cable 666, and since the wiper,
  • the relay GAIlIis maintained energized throughY ⁇ the circuit previously..described, so long as the permutation relays, inA the 1st fdigit'Ident; 2nd
  • Fix storage groups remain oper- Y ated,A and -theselatterrelays are held operated until the brush b. of distributor DRE has reached segment 45 .ofthe distributor ring I, and the release-relay lREL has operated to remove battery, at 'its armature ⁇ andl break ⁇ contact 3Il3,rfrom the holding circuit 60 If for the storage relays of Fig.Y 6.
  • purposeofltheseirelays is to control the selectionv of the particular Arow .of indicatorsin ⁇ the display boardwherelight-34, Fix 1,. isat presentdisplayed.- .Thepresent positiontens PPT and unitsA PPU1 relays", ⁇ eight in number, vare ofthe mechan. ⁇ ical-iatching, electrical-reset. type, and store in four Aunit permutation code a two-fdigit ⁇ number correspondingfto the-1 ⁇ owy number in the display board where flight 34,-Fix 1, is posted.
  • the operatingwinding lloi Athe ⁇ relay is connected, in ⁇ multiplewith the.other.relayA windings o, througha conductor Bel -toa source of grounded -batterytk- All the reset Iwindings R are connectedinseries-by means ofaconduc- ⁇ tor 65o; to the source of battery When the Similarly,
  • relay GAIII operating winding o fv any of the relays is energized, it attracts its armature a and closes a circuit through its make contact, for example, from conductor 4 in cable 333 toA conductor I in cable GIG.
  • the armature a moves towards its make contact, it lifts a pivotally-,mounted mechanical latch b which drops down behind the armature a and keeps it locked in circuit-closing position until the release or reset winding R is energized.
  • Energization of the reset winding attracts its armature and raises the latch b, whereby the armature a returns to its open position, either under the iniiuence of a spring or by gravity.
  • the ground circuit from 335, Fig. 3, is applied selectively through the closed contacts of those relays PPT, Fig. 6, which are operated, and through certain of the conductors I, 2, 3 and 4 of cable BIE to the windings of relays PTI, PT2, PTS and PT4, Fig. 7.
  • the contacts of those relays PPU which are operated extend ground over certain of the conductors 5, 6, 'I and 8, cable SIG, to the windings of relays PUI, PU2, PU3, PU4, Fig. 7.
  • the relays PU and PT operate in combination in accordance with the permutation codes stored on relays PPU and PPT and serve to select one of ten cable leads 0 to 9 through the conventional pyramidal arrangement of armatures and contacts associated with the relays PU and PT.
  • Ground will be fed from apex II'I through the operated inner armatures and make contacts of relays PTI, PT2 and PT4 and the unoperated inner armature and break contact of relayPTrS, through conductor 0 to operate relay PT00, Fig. 7, and the 0 contact of each of the relays PT00 to PTB will have ground applied thereto from the apex H6, through the multiple cable H3. Since relay PTB is the only one operated, however, the conductor 00 in cable Il will be the only one having ground applied thereto. This willcomplete a circuit fromgrounded armature 'IIS of energized relay PUI through operated inner armature and contact of relay PU2, non-operated inner armature and break contact of relay PU3,
  • relay DGA00 connects the coils of the display board indicators IT, IU, TT, TU, AT and AU to the pulsing multiple through cable 50
  • the display board indicators need not be of the recording kind employed in the record board, and may be of any suitable display type such as disclosed in the aforesaid Patents Nos.
  • the switch members s on the indicators open the restoration circuits to ground when theindicator drums reach their blank positions, the switch members being re-v closed when the indicators are stepped from their blank positions during the resetting operations.
  • distributor DRI a comdescribed later.
  • Relay T operated and at its armatures and make contacts connected through the circuits from pulsing relays PI, P2, P4 and P'I to pulsing leads I4 and I5 in cable 305, which are extended, through contacts of relay GAI4 and cable 338, to the windings of the time indicator units TT and TU, Fig. 9, of row I4 in the record board, and are also extended through conductors 3 and 4 in cable 50
  • a relay M is arranged to tie together the pulsing multiples of the various rows in the display board. As later described under Sequencing, .it is necessary to utilize five separate pulsing multiples 50
  • relay M When relay M is operated, as described below, the corresponding leads of the pulsing multiples 50
  • the circuits set up by the first and second digit identification storage relays, the x relays and the range relays coact to select gang relay GAI4, Fig. 3, and gang relay DGA00, Fig. 5.
  • the range code for the character 2 causes lead in cable 620 to be energized to operate the range relay A (altitude) shown in Fig. 3.
  • the pulses generated during the revolu tion of distributor DR2 and controlled by the circuits set up in the Data (Tens) and Data (Units) relays are now sent out over conductors I6 and of cable 305 to operate the indicators AT and AU of row I4 in the record board and similarly indicators AT and AU in row of the display board. This operation posts the altitude 45 (4500 feet) in these indicator positions on both boards.
  • Relay L upon releasing opens at its armature
  • Relay TC does not release immediately since it is locked up through its own contact 'l to ground over conductor
  • relay REL is operated as previously described, and at its operated armature 330 and break contact releases the relay TC.
  • relay L removes the ground from the hunting circuit of the rotary switch magnet SSM, Fig. 1, so that unless another incoming message is waiting, the switch SS will remain at its previous position.
  • each row is provided with a group of present position storage relays ⁇ designated PPT and PPU, Figs. 6 and 7, which have recorded upon them the horizontal row number occupied by the same flight in the display board.
  • Each horizontal row in the record board is also provided with a Fix indicator F, as above stated, upon which is stored the Fix in which the flight is displayed on the display board.
  • Each horizontal row in the record board is also providedv with two recording new position indicator units such as NPT and NPU, Figs. 3 and 4, which record the new horizontal position in the display board to be occupied by the flight data posted in that row of the record board.
  • slidable locking bar 200 which extends to all of the keys SEQ to A in the row.
  • the tapered or coni.. cal edge of the body portion of the key shifts the bar to the right, and passes through an aperture in the bar and the key is held depressed by the bar until the key release magnet KR is energized, which moves the locking bar to the left and releases the key.
  • One locking bar is provided for each row of keys, and each bar is released by magnet KR.
  • the left hand row of seven push buttons is used to select the type of operation to be performed by the keyset.
  • PP Tens and PP Units are used to set up present positions by operating various combinations of the PPT and PPU relays, Figs. 6 and 7, in permutation code.
  • the next two rows designated Data Tens and Data Units are used to control the number of impulses sent to any of the indicator units selected by means of the range keys NP, F, I, T and A in the left hand row.
  • the last two rows, designated Hor. Pos, Tens (horizontal position tens) and Hor. Pos. Units (horizontal position units), are used to select the row in the record board where a flight is to be initially posted.
  • the iiight number is posted ⁇ in a selected row in the record board and display board.
  • the local operator Prior to receiving the preceding message regarding ilight 34 over the line from teleprinter I III, Fig. 1, the local operator will have posted the night number 34 and the Fix 1 on the record and display boards by the use of the keyset. The operator will have also selected a row in the display board where this flight may initially be displayed in vproper relatio-n to other flights on the display board.
  • the operation of posting flight 34 Fix .1, in krow I4 of the record board and row of the display board will now be described. Since the information to be posted comprises the flight number 34, the present position 00, and the Fix 1, two keyset operations will be required.
  • the first operation will be the posting of the flight number 34 in the Identification, Range and the storage of the present position 00 in the PPT and PPU relays in the selected row I4 of the record board.
  • the operator depresses the 0 keys in the PP Tens and PP units rows. Key 3 in the Data Tens row and key 4 in the Data Units row are operated., and in order to select row I4 of the record board which happened to be idle at the time, the operator also depresses key I in the horizontal position tens row and key 4 in the horizontal position units row.
  • the last operation is that of selecting the range, which is performed by depressing the I key in the left hand row of the keyset.
  • the left hand contacts of the I key close a circuit from ground at 20
  • the' K relay applies ground through its operated armature
  • relay K also closes a path to operate relay KS. Fig. 2, from battery on armature
  • the right hand vcontacts of the PP tens key 0, Fig. 2 have closed circuits from ground at 2I2 to conductors 2H, 245 and 2I6 which continue through conductors 20, 2l and 23 of cable 305, and conductors 2, 3 and 5-of cable 6I'I, to
  • the operation of the I -push button in the left hand row of keys shown invFig. 2 has closed a circuit from ground at 20
  • This relay connects the pulsing leads from the relays PI, P2,P4, and P'I to. the pulsing multiple conductors I 2 and I3 in cable 355 where they4 eventually terminate on the coils of the IT and IU indicators inltherecord board horizontal row I4, and the IT and -IU indicators in row 00 of the display board.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Audible And Visible Signals (AREA)
US518370A 1944-01-15 1944-01-15 Communication and posting system Expired - Lifetime US2386743A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE466036D BE466036A (enrdf_load_stackoverflow) 1944-01-15
US518370A US2386743A (en) 1944-01-15 1944-01-15 Communication and posting system
GB3813/45A GB600743A (en) 1944-01-15 1945-02-15 Improvements in electrically-controlled indicator systems
CH256708D CH256708A (fr) 1944-01-15 1945-04-28 Installation pour l'enregistrement et l'exposition d'informations concernant différents items.
FR941633D FR941633A (fr) 1944-01-15 1946-04-30 Perfectionnements aux systèmes de communications et de signalisation

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US2386743A true US2386743A (en) 1945-10-09

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US (1) US2386743A (enrdf_load_stackoverflow)
BE (1) BE466036A (enrdf_load_stackoverflow)
CH (1) CH256708A (enrdf_load_stackoverflow)
FR (1) FR941633A (enrdf_load_stackoverflow)
GB (1) GB600743A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443199A (en) * 1945-10-04 1948-06-15 Teleregister Corp Airway traffic control system
US2475848A (en) * 1945-08-04 1949-07-12 Teleregister Corp System for automatic transmission of messages between flight progress boards and aircraft
US2481239A (en) * 1944-03-31 1949-09-06 Gen Railway Signal Co Airway traffic controlling system with verification of communicated messages
US2535954A (en) * 1944-03-31 1950-12-26 Gen Railway Signal Co Airway traffic controlling system
US2568756A (en) * 1945-09-05 1951-09-25 Int Standard Electric Corp Reservation system
US2661465A (en) * 1952-09-13 1953-12-01 Automatic Elect Lab Arrival and departure transportation indicator system
US2674733A (en) * 1952-12-02 1954-04-06 Hughes Tool Co Electronic sorting system
US2679638A (en) * 1952-11-26 1954-05-25 Rca Corp Computer system
US2886799A (en) * 1952-06-02 1959-05-12 Rca Corp Static magnetic delay-line

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481239A (en) * 1944-03-31 1949-09-06 Gen Railway Signal Co Airway traffic controlling system with verification of communicated messages
US2535954A (en) * 1944-03-31 1950-12-26 Gen Railway Signal Co Airway traffic controlling system
US2475848A (en) * 1945-08-04 1949-07-12 Teleregister Corp System for automatic transmission of messages between flight progress boards and aircraft
US2568756A (en) * 1945-09-05 1951-09-25 Int Standard Electric Corp Reservation system
US2443199A (en) * 1945-10-04 1948-06-15 Teleregister Corp Airway traffic control system
US2886799A (en) * 1952-06-02 1959-05-12 Rca Corp Static magnetic delay-line
US2661465A (en) * 1952-09-13 1953-12-01 Automatic Elect Lab Arrival and departure transportation indicator system
US2679638A (en) * 1952-11-26 1954-05-25 Rca Corp Computer system
US2674733A (en) * 1952-12-02 1954-04-06 Hughes Tool Co Electronic sorting system

Also Published As

Publication number Publication date
GB600743A (en) 1948-04-16
FR941633A (fr) 1949-01-17
CH256708A (fr) 1948-08-31
BE466036A (enrdf_load_stackoverflow)

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