US1921407A - Telegraph transmitting apparatus - Google Patents

Telegraph transmitting apparatus Download PDF

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Publication number
US1921407A
US1921407A US595851A US59585132A US1921407A US 1921407 A US1921407 A US 1921407A US 595851 A US595851 A US 595851A US 59585132 A US59585132 A US 59585132A US 1921407 A US1921407 A US 1921407A
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US
United States
Prior art keywords
signal
case
keyboard
key
cam
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
US595851A
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English (en)
Inventor
Griffith Ronald George
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.)
Creed and Co Ltd
Original Assignee
Creed and Co Ltd
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 claimed from GB16569/32A external-priority patent/GB388825A/en
Application filed by Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of US1921407A publication Critical patent/US1921407A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
    • H04L17/06—Contact operating means

Definitions

  • This invention relates to keyboard controlled apparatus for telegraph systems employing case grouping of characters.
  • the object of the present invention is to provide keyboard controlled apparatus for telegraph systems employing these separate case signals in 35 which the disposition of the character keys in the keyboard and the mode of operation of the keyboard for telegraphicpurposes is as nearly as possible identical withthat of the standard four-row typewriter keyboard wherein separate 40 key levers are provided for letters and figures and no case shift key is required to be depressed on changing from letters to figures or vice versa.
  • case shift key levers can be dispensed with for changing from letters to figures and -vice versa
  • case signals could be provided for by 'sepa rate key levers for the purpose of providing a still further series of possible character selections.
  • key levers can also be provided in the keyboard for controlling manually the transmission of the case signals which according to the method of the. present invention are normally controlled automatically.
  • certain characters having identical code combinations, in different case groups can still be assigned to the said key levers with the manual insertion of a case signal, whilst the case signal is inserted automatically for other key levers.
  • the key levers of a keyboard are represented in the drawing by the two keys 1 and 2. Beneath the key levers are a series of permutation bars 37 having inclined teeth, which bars are actuated longitudinally in one direction or the other in accordance with the elements of a signal to be transmitted on depression of a key lever in the manner already well known.
  • a further toothed bar 8 which from its function may be called a case determining bar but in reality resembles the sixth permutation bar in a six unit cope keyboard, is also movable longitudinally and carries a series of teeth under the character key levers, the teeth being inclined in one direction for each of the keys appertaining to one case group of characters and in the opposite direction for the keys appertaining to the other case group.
  • this bar 8 at each of its two longitudinal positions Bar 8 is only operated from one to the other position on depression of a character key in a change of case.
  • the depression of key levers appertaining to the same case group would only tend to actuate the bar to the same position and it is only when a key appertaining to the opposite case group is depressed that bar 8 is operated to the other position.
  • a further bar 9 has an inclined tooth under each key lever and serves as a universal vbar actuated by any key lever to release the mechanical functions of the apparatus.
  • each cam having two projections on opposite sides of a diameter and adapted during each half revolution of sleeve 27 momentarily to actuate each of the pair of rods in an outward direction from sleeve 27 :against the tension of individual springs 34 attached to each pair of rods.
  • Sleeve 27 is rotatably mounted on a driving shaft 35 which is arranged to be rotated at a suitable speed through gear wheel 36 from a source of mechanical power, not shown, which is normally provided for apparatus of the class
  • a clutch mechanism of any suitable type collectively represented by the symbol 37 in the drawing is arranged to couple sleeve 27 to shaft 35 for a half revolution only on each actuation of bar 9. This is effected as is shown in the drawing, through a further cranked lever 36 independently pivoted on rod 17 raising latch 37' through depending member 38. Depending member 38 is disengaged from latch 37' during each subsequent half revolution on release of the clutch and is only re-engaged therewith on release of the depressed key in readiness for the depression of the next key.
  • a rejector cam not shown in the drawing also acts on rod 10 during each half revolution to return bar 9 mechanically to its initial position. This provides a useful throw out action to an actuated key lever after its functions have been completed.
  • -Cams 2832 are arranged on sleeve 27 relatively to the normal position of rest of the sleeve as determined by clutch 37 so that the projections on the cams actuate the series of rods 18 and 19 soon after the clutch is released and actuate to the one or other position the series of members 2125 and 26 in accordance with the one or other position of the series'of 3-armed members 1115 and 18.
  • Each of the series of bars 2l25 co-operates with a further series of B-armed members 4145 independently pivoted on rod 46 and having vertical rods 47 and 48 pivoted on two opposite arms of members 41 i5 with a further cam sleeve 49 situated between the rods.
  • the cam sleeve carries a series of cams 5054 each cam having projections on opposite sides of a diameter as before, but in this case each cam has its projections angularly spaced around the sleeve so that each pair of rods in the series is actuated outwardly in sequence and according to the longitudinal position of each bar 2125 the one or other associated rod 47 or 48 is brought into operative relation with horizontal rods and 56 common to all of the series of vertical rods.
  • the horizontal rods 55 and 56 are fixed to two arms of a lever 57 pivoted at 58.
  • a third arm of the lever carries pins 59 which actuate a contact lever 60 pivoted at 61 from one to the other of two contact screws 62 and 63.
  • a spring 64 or other convenient means holds contact lever 60 firmly on to the one or other contact screw to which it has been actuated.
  • a sixth and seventh cam 65 and 66 is also mounted on a sleeve 49.
  • Each cam has two projections but each pair of projections are axially disposed on the sleeve to co-operate with only one of two vertical arms 67 and 68 respectively during rotation of sleeve 49.
  • the arms 67 and 68 in this case are pivoted to a member 69 which is fixed and does not oscillate on rod 46 and being invariably operated during each revolution of the cam sleeve.
  • the sleeve 49 is mounted on a shaft 70 to which it is coupled by clutch 71 under control of two pivoted latch members 72 and '73.
  • the latch the clutch at each half revolution, but toggle arms 75 pivoted to the latch members are each under the control of a common actuating bar 76 pivoted at 77.
  • Shaft 70 is driven by the source of mechanical power above mentioned through gear wheel 78 at a speed as determined by the required speed of transmission of the signal elements.
  • Cam sleeve 49 together with clutch 71, vertical rods 47 and 48 and contact lever 60 will be recognized as a form of the usualstart stop signal transmitting mechanism, each signal combination being sent during each half revolution of sleeve 49, the sixth and seventh cams 65 and 66 being adapted to send the starting and stopping elements to each signal and the permutation elements of the signal being determined
  • the actuating lever '76 in the arrangement shown in the drawing instead of being directly actuated by the universal bar in the keyboard as in the usual keyboard transmitter, is actuated through a delay or intercepting mechanism for the purpose of the present invention to delay the transmission of a signal combination consequent upon the depression of a character key on change of case, whilst a case signal is transmitted.
  • the delay mechanism shown in the particular embodiment of the invention illustrated in the drawing consists of a cam 78 fixed to the first mentioned cam sleeve 27 and provided with two raised portions by which arm 76 is operated to a position to release clutch.71. In the normal rest position of cam sleeve 27 at each half revolution, an extension of arm 76 rests on a raised portion of the cam 78 and clutch 71 is held from rotation.
  • locking means for the permutation bars 3- 7 and 80 with one or the other of two notches in the permutation bars 3--8 according to the position to which each bar has been actuated.
  • the object of the locking means is to lock the combination set up on bars 3--7 and 8 whilst the combination is being transferred to bars 21-25 and 26 and for any desired period following necessary to prevent a too rapid operation of the key: board.-
  • the lever 80 is preferably arranged relatively to cam 78 so that the locking bar 83 is released to lock the combination immediately the sleeve 27 commences rotating and cams 28-32 can then effect the actuation of depending rods 18 and 19 to transfer the combination.
  • arm 76 After a further period of rotation of sleeve 27, arm 76 then falls from a raised portion of the cam 78 and clutch 71 is released to effect the transmission of the signal combination. This further period of rotation of sleeve 27, however, can be arrested until a case signal is transmitted.
  • the means for transmitting a case signal is illustrated in the drawing by an auxiliary cam sleeve 84 independently mounted on driving shaft 70 to which it can be coupled by clutch 85 under the control of coupled latch members 86 actuated from bar 26.
  • auxiliary cam sleeve 84 When bar 26 is actuated to one position the cam sleeve 84 is clutched to the driving shaft 70 for one half revolution and on actuation of bar 26 to the opposite position the cam sleeve rotates a further half revolution.
  • On sleeve 84 are fixed two cams 87 and 88 having projections arranged according to the one or other character of the code elements of the two case signals.
  • the cams 87 and, 88 are conveniently arranged to actuate the signal contact lever 60 through pins 89 and 90 fixed to the two vertical rods 67 and 68 respectively which normally effect the transmission of the start and stop elements of a character combination.
  • Each cam as shown controls the movement of one vertical rod so that during one half revolution of sleeve 84 the positive and negative code elements, for instance, of a letter shift signal, are transmitted by contact lever 60, and during other half revolution the positive and negative elements of a figure shift signal are transmitted.
  • a cam 92 raises a lever '93 and depresses another lever 94 into the path of rotation of the ratchet teeth of clutch 37.
  • This other lever 94 is preferably spring yielding as indicated to avoid looking over the tops of the teeth of the clutch.
  • Lever 94 is adapted when actuated to arrest clutch 37 and sleeve 27 in that portion of its rotation after the locking of permutation bars 37 and the actuation of depending rods 18 and 19 to transfer the combination but before the period in which lever 76 falls from the raised portion of cam 78 to release main clutch 71.
  • a cam 95 on cam sleeve 49 similar to cam 92 on cam sleeve 84 can also be arranged to actuate lever 94 so as to prevent the completion of rotation of clutch 37 and the unlocking of the keyboard until the completion of the transmission of the signal.
  • lever 93 falls into a depression in cam 92 and lever 94 is raised clear of the teeth of clutch 37.
  • a keyboard In telegraph signal transmitting apparatus, a keyboard, separate keys in said keyboard for characters in separate case groups, and means operable in response to the actuation of a character key on a change of case to insert an appropriate case signal.
  • a keyboard containing character keys, a series of permutation bars corresponding to the elements of a signal combination and operable by said keys, a case determining bar operable to one of a plurality of positions in accordance with the case grouping of each key in said keyboard, and means operable in response to the actuation of said case determining bar to insert an appropriate case signal.
  • a keyboard having character keys arranged in two different case groups, signal transmitting means, signalstorage'means intermediate said keyboard and said signal transmitting means, a case determining bar operable from said keyboard upon actuation of one of said keys, and
  • a keyboard having character keys arranged in two case groups, a series of permutation members controlled by said keys. signal transmitting contacts operable in accordance with settings of said permutation members, a case determining bar controlled by the character keys, and means controlled by said bar to actuation said transmitting contacts in accordance with the elements of an appropriate case signal.
  • a keyboard having separate keys for characters in separate case groups, a series of permutation members operable by said keys, a corresponding series of contact controlling members, signal transmitting contacts, a case determining bar also operable by any one of said keys, and cam means released at each operation of said case determining bar to actuate said signal transmiting contacts and to lock during such actuation the setting of said series of controlling members.
  • a keyboard having-separate keys for characters in separate case groups, signal transmitting contacts, overlap means comprising a series of contact controlling members in which the elements of a signal can be stored, and cam means having code projections corresponding to the elements of a case signal for actuating said signal transmitting contacts on change of case group.
  • a keyboard In a telegraph signal transmitter, a keyboard, a case determining bar operable to one of a plurality of positions by keys in said keyboard belonging to different case groups, and cam means controlled by said case determining bar and having code projections corresponding to the elements of corresponding case signals.
  • a keyboard for sequentially operating said contacts in accordance with the setting of said series of controlling members, a case determining bar operable from one to the other of two positions, a separate cam sleeve controlled thereby and having code projections also for actuating said contacts, and means operable during rotation of said separate cam sleeve for delaying the release of said main cam sleeve.
  • a keyboard a series of permutation bars, a corresponding series of contact controlling members, signal transmitting contacts, a main cam sleeve cooperable with said contact controlling members to actuate said contacts, a separate cam sleeve having code projections also adapted to actuate said contacts, and an auxiliary cam sleeve released from said keyboard and having eams adapted to actuate said series of controlling members in accordance with the setting of said series of permutation members.
  • a. keyboard a series of permutation members, a corresponding series of contact controlling members, signal transmitting contacts, a main signailing shaft, a separate signalling shaft, a case determining bar controlling the rotation of said separate shaft, an auxiliary shaft released from said keyboard, cams on said auxiliary shaft adapted to actuate said series of controlling members under control of said permutation members, means actuated by said auxiliary shaft to release said main signalling shaft, and other means operable during rotation of said separate signalling shaft to arrest the rotation of said auxiliary shaft.
  • a main signalling cam shaft for transmitting case signals
  • a separate signalling cam shaft for transmitting case signals
  • a keyboard for transmitting case signals
  • a case determining bar operable therefrom and controlling the rotation of said separate shaft
  • an auxiliary cam shaft releasable from said keyboard and operable during rotation to release said main cam shaft, and means actuated during rotation of said separate cam shaft to arrest said auxiliary shaft before the release of said main shaft.
  • a keyboard In a telegraph signal transmitter, a keyboard, a series of permutation bars. a corresponding series of contact controlling members, an auxiliary cam shaft released for rotation from said keyboard-cam means on said auxiliary shaft adapted to actuate said series of controlling members in accordance with the setting of said series of permutation members, and means also operable on commencement of rotation of said auxiliary cam shaft to lock said series of permutation bars and to unlock when the setting of said permutation bars has been transferred to said controlling members.
  • a keyboard having a plurality of keys arranged in two different case groups, a series of signal corresponding to the case group of the key actuated.
  • a keyboard having a plurality of keys arranged in two different case groups, a series of permutation members corresponding to the elements of a signal combination and operable in particular combinations according to the key actuated, a two position case determining memher, a means for moving said member from one position to the other in response to the actuation of a key of one case group followingv actuation of a key of the other case group, signal transmitting means operated in accordance with the signal combinations set up on the permutation members by each key, and means responsive to the operation of said case determining member to either position to cause said signal transmitting means to transmit a special signal combination corresponding to the particular case group con taining the actuated key prior to the transmission of the signal combination representing said actuated key.
  • a keyboard having a plurality of keys arranged in two different case groups, a series of permutation members corresponding to the ele-- ments of a signal combination and operable in particular combinations according to the key actuated, a two position case determining member, a means for moving said member from one position to the other in response to the actuation of a key of one case group following actuation of a key of the other case group, signal transmitting means operated in accordance with the signal combinations set up on the permutation members by each key, and means responsive to the operation of said case determining members for transmitting an appropriate signal corresponding to the particularcase group'containing the actuated key and during the transmission of the case signal blocking the transmission of the character signal representing said actuated key.
  • a keyboard In a telegraph signal transmitting apparatus, a keyboard, separate keys in said keyboard for certain characters arranged in separate case groups, and means operable in response to the actuation of any ofsaid character keys on a change of cas'e to insert an appropriate case signal.
  • Signal transmitting apparatus provided with signal transmitting means, and means responsive to the operation of the case signal inserting means to cause signal transmitting means to transmit, first, the case signal and then the character signal represented by the actuated key.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Transmission Devices (AREA)
  • Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Mechanical Operated Clutches (AREA)
  • Press Drives And Press Lines (AREA)
  • Switches With Compound Operations (AREA)
US595851A 1931-09-03 1932-02-29 Telegraph transmitting apparatus Expired - Lifetime US1921407A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB16569/32A GB388825A (en) 1932-10-07 1931-09-03 An improved mechanically relayed movement for telegraph and like signalling mechanism
GB27938/32A GB408319A (en) 1931-09-03 1932-10-07 Improvements in or for keyboard operated telegraph apparatus

Publications (1)

Publication Number Publication Date
US1921407A true US1921407A (en) 1933-08-08

Family

ID=33554188

Family Applications (3)

Application Number Title Priority Date Filing Date
US595851A Expired - Lifetime US1921407A (en) 1931-09-03 1932-02-29 Telegraph transmitting apparatus
US632356A Expired - Lifetime US1953066A (en) 1931-09-03 1932-09-09 Mechanically relayed movement for telegraph selector mechanism
US647644A Expired - Lifetime US1928421A (en) 1931-09-03 1932-12-16 Telegraph signal transmitting apparatus

Family Applications After (2)

Application Number Title Priority Date Filing Date
US632356A Expired - Lifetime US1953066A (en) 1931-09-03 1932-09-09 Mechanically relayed movement for telegraph selector mechanism
US647644A Expired - Lifetime US1928421A (en) 1931-09-03 1932-12-16 Telegraph signal transmitting apparatus

Country Status (5)

Country Link
US (3) US1921407A (de)
AT (3) AT135279B (de)
DE (2) DE599288C (de)
FR (1) FR731753A (de)
GB (2) GB388785A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517995A (en) * 1945-03-08 1950-08-08 Ibm Printing telegraph apparatus
US2614632A (en) * 1948-07-27 1952-10-21 American Telephone & Telegraph Apparatus for recording numerals in code
US3450837A (en) * 1966-07-25 1969-06-17 Olivetti & Co Spa Code translating device for a start-stop teleprinter

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB454593A (en) * 1935-04-05 1936-10-05 Creed & Co Ltd Improvements in or relating to telegraph transmitters
DE744377C (de) * 1941-06-18 1944-01-14 Siemens Ag Fernschreibsender fuer Fuenferalphabet mit mehreren, vorzugsweise zwei Typengruppen und selbsttaetiger Aussendung eines Typengruppenwechselzeichens beim UEbergang auf eine andere Typengruppe
US2623118A (en) * 1948-10-08 1952-12-23 Creed & Co Ltd Keyboard controlled telegraph apparatus
DE970439C (de) * 1954-06-05 1958-09-18 Siemens Ag Tastenlocher fuer Fernschreiblochstreifen
DE1436714A1 (de) * 1963-08-27 1969-01-09 Siemens Ag Verfahren und Einrichtung zum Umschalten der Funktionszuordnung von doppelt belegten Tasten
US3623588A (en) * 1969-04-01 1971-11-30 Bunker Ramo Electronic keyboard with upper- and lower-case capability
US4258356A (en) * 1978-04-03 1981-03-24 Scm Corporation Multi bar encoding apparatus utilizing acoustic energy
USRE32419E (en) * 1981-03-16 1987-05-12 Engineering Research Applications, Inc. Molded keyboard and method of fabricating same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517995A (en) * 1945-03-08 1950-08-08 Ibm Printing telegraph apparatus
US2614632A (en) * 1948-07-27 1952-10-21 American Telephone & Telegraph Apparatus for recording numerals in code
US3450837A (en) * 1966-07-25 1969-06-17 Olivetti & Co Spa Code translating device for a start-stop teleprinter

Also Published As

Publication number Publication date
AT137627B (de) 1934-05-25
AT135279B (de) 1933-11-10
GB388785A (en) 1933-03-03
DE599288C (de) 1934-06-28
DE620410C (de) 1935-10-21
GB408319A (en) 1934-04-09
US1953066A (en) 1934-04-03
AT135285B (de) 1933-11-10
FR731753A (fr) 1932-09-08
US1928421A (en) 1933-09-26

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