US3327626A - Drum series print member construction - Google Patents

Drum series print member construction Download PDF

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Publication number
US3327626A
US3327626A US481796A US48179665A US3327626A US 3327626 A US3327626 A US 3327626A US 481796 A US481796 A US 481796A US 48179665 A US48179665 A US 48179665A US 3327626 A US3327626 A US 3327626A
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US
United States
Prior art keywords
drum
typewheels
printer
print
adjacent
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
US481796A
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English (en)
Inventor
Clayton H Clark
Donald J Stefanik
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.)
SCM Corp
Original Assignee
SCM Corp
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 GB1053726D priority Critical patent/GB1053726A/en
Priority to GB1053727D priority patent/GB1053727A/en
Priority to GB1053722D priority patent/GB1053722A/en
Priority to GB1053721D priority patent/GB1053721A/en
Priority to GB1053725D priority patent/GB1053725A/en
Priority to GB1053723D priority patent/GB1053723A/en
Priority to GB1053724D priority patent/GB1053724A/en
Priority claimed from US184820A external-priority patent/US3280256A/en
Priority to DES100338A priority patent/DE1295607B/de
Priority to DES84508A priority patent/DE1229135B/de
Priority to DES107732A priority patent/DE1295606B/de
Priority to DE1963S0100341 priority patent/DE1462006A1/de
Priority to DES100339A priority patent/DE1290165B/de
Priority to FR930259A priority patent/FR1378834A/fr
Priority to US481796A priority patent/US3327626A/en
Application filed by SCM Corp filed Critical SCM Corp
Priority to US481795A priority patent/US3304366A/en
Priority to US481798A priority patent/US3289189A/en
Priority to US481799A priority patent/US3296370A/en
Priority to US481797A priority patent/US3296369A/en
Publication of US3327626A publication Critical patent/US3327626A/en
Application granted granted Critical
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/22—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection
    • B41J1/32—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies mounted on carriers rotatable for selection the plane of the type or die face being parallel to the axis of rotation, e.g. with type on the periphery of cylindrical carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/34—Driving record carriers by members acting directly or indirectly thereon through non-slip drive means, e.g. sprocket
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/02—Details not particular to receiver or transmitter
    • H04L13/06—Tape or page guiding or feeding devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/02—Details not particular to receiver or transmitter
    • H04L13/08—Intermediate storage means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/182—Printing mechanisms
    • 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
    • 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
    • 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
    • H04L17/16—Apparatus or circuits at the receiving end
    • H04L17/24—Apparatus or circuits at the receiving end using mechanical translation and type-head printing, e.g. type-wheel, type-cylinder

Definitions

  • This invention relates to a communications equipment drum printer primarily intended for use in high speed telegraphic and other data processing applications and particularly relates to construction of the printer drum.
  • the inventive drum type of continuously rotating page printer incorporates an inexpensive yet reliable and rugged drum construction, constituting the invention of this application.
  • a primary object of this invention resides in the provision of a novel drum printer drum construction.
  • a further object resides in the provision, in a continuously rotating drum printer, of a novel rotatable drum assembled from a plurality of rings of. printing elements to provide lines of identical type faces extending from a start-of-line position to an end-of-line position on a page, each ring being of novel lightweight construction and maintained in accurate indexed assembly by means of clamping end plates and the frictional engagement between each adjacent ring, and specifically by providing such frictional engagement at the peripheries of adjacent rings.
  • still another object resides in providing the rings of printing elements on peripheral flanges of print wheels, each of. which wheels has identical dual rows of all desired characters-to-be-printed on the printer and with the center lines of axially aligned, identical characters accurately spaced apart a predetermined distance and also accurately spaced from the adjacent edges of the peripheral flange one half of that predetermined distance and the axial width of the wheel peripheral flange being maintained to extremely minute tolerances.
  • Still another object resides in the provision of a novel drum printer print drum made from a laminated assembly of print wheel rings wherein each ring has a T-shaped radial cross-section with the circular peripheral portion of a ring carrying the printing symbols and constituting the cross flange of the T-section.
  • FIGURE 1 is a front perspective view of the printer, primarily to illustrate the general arrangement of printer components and therefore omitting many details which are illustrated in the following figures;
  • FIGURE 2 is a partially section elevation view showing the print drum with its drive gear, clock assembly, and bearing mounting and also illustrating the paper feed components;
  • FIGURE 3 is a side elevation view of one of the plurality of double typewheel discs from which the type drum is assembled;
  • FIGURE 4 is a layout detail view of a portion of the double type on the periphery of a typewheel.
  • FIGURE 5 is a machine drawing detail, shown in section taken on lines 5-5 of FIGURES 3 and 4, and illustrates the drum assembly register slot and the requisite manufacturing tolerances for a disc with standard teletypewriter characters.
  • FIGURE 1 General A perspective view of an exemplary teleprinter 102 is shown in FIGURE 1.
  • This equipment was initially developed for high-speed telegraphic communication in conjunction with a complete send-receive system designed for keyboard sending and magnetic tape recorder sending, page copy monitoring and page copy receiving.
  • the entire system is more fully disclosed in copending parent application Ser. No. 184,820 to which reference may be made for details of printer structure and operation.
  • the invention in this application pertains to the printer drum construction and hence other details of the printer and its specific operation will not be described herein.
  • the printing mechanism employs a rotating drum composed of thirty-six double row type wheels, or a total of 72 rings of type, each ring having the 52 standard communication symbols. Other arrangements can be accommodated as desired. For example, for weather symbols, the drum has 76 rings of type, each ring having 52 conventional weather symbols. A print hammer is moved from left to right in front of the drum under control of an escapement type spring-biased stepping mechanism and strikes the drum once per revolution for each character to be printed.
  • the printing mechanism has a pulse clock mechanism which supplies a series of pulses to the printer electronics representative of drum rotational position.
  • each pulse represents a new character in the printing position
  • the pulses furnish information which allows the printer electronics to energize the print hammer electro-magnet as the desired character moves in front of the hammer.
  • Characters on each ring of type are placed in binary order according to the Baudot code for the character.
  • each character is assigned a position in a 32-count, binary progression so that the printer electronics can compare an incoming character against the series of pulses that indicate the physical position of the drum characters.
  • FIGURE 1 provides an over-all picture of the mechanical components of the type drum page printer 102 and the positional relationships of various components.
  • the drum 704 includes, on its cylindrical periphery, a plurality of different lines of identical information symbols, 72 identical symbols (76 for a weather drum) constituting one line extending along the cylindrical drum periphery parallel to the drum axis.
  • the drum is continuously rotated by a printer motor (not shown) and is directly connected with a drum position clock wheel 706 to enable determination of the passage of each distinct line of type past a print station line by related printer electronics which have been described in the aforenoted parent application.
  • a print hammer carriage 708 can be spaced across in front of the drum surface, parallel to the drum axis, by an escapement spacing mechanism actuated by spacing solenoid 204 at the right hand side plate.
  • the carriage 708 is returned by a carriage return mechanism seen at the left hand side of FIGURE 1, which is activated by the carriage return solenoid 308. Power for carriage return is derived through a clutch device driven by the printer motor.
  • a sheet paper, strip record medium is supplied from a paper roll 712 mounted between the frame end plates, to the rear of drum 704, the paper feeding over suitable guide devices (not shown), under and up past the front of the drum, passing between the drum 704 and the print hammer carriage 708 and under two, side edge guide fingers 713, one being shown in FIGURE 2.
  • Paper feed is accomplished by two, solenoid stepped, pressure rolls under the drum which press the paper against two feed wheels at the ends of the print drum.
  • An ink ribbon 716 passes across the drum face parallel to the drum between the print hammer and the paper to transfer the typed impression from the drum to the page during a print operation.
  • the ink ribbon assembly feed and reverse mechanism is conventional and will not be described.
  • the ink ribbon 716 in this printer is rigged to always pass in a straight stretch across the front of the drum 704 parallel to the character spacing path of the print hammer, and the entire straight front stretch of the ink ribbon is lifted to a position in front of the hammer just prior to a printing action.
  • the printer components are mounted on a support structure including a thick base plate 718 having a slotted center bar 719 passing laterally from one side of the printer to the other and under the path of travel of the print hammer carriage.
  • Two vertical side plates 720 and 721 are rigidly secured to the base plate 718 and provide the mounting structure for most of the printer components.
  • Drum assembly Referring now to FIGURE 1 (also FIGURES 3-5), the print drum 704 is pre-assembled in an inexpensive manner as compared with previously known drums for type drum printers which were engraved from solid materials. (Cost of the fabricated type wheel drum of the present invention is approximately that of an engraved drum.)
  • the drum 704 is fabricated from a plurality of double row type wheels 722, manufactured to very close tolerances, mounted, indexed and clamped on a drum shaft 723 in a manner now to be described.
  • each type wheel 722 is made from a suitable high strength material capable of withstanding multiple print hammer blows and maintaining true circular shape under continual rotation. Steel, other presently known high strength metals and some plastics can be used.
  • the wheel 722 has a central, disc shaped, thin web 724 apertured with lightening holes 725, an indexing hole 726 and balance holes 727 and 728.
  • the rim 730 of each type wheel 722 provides a peripheral T-flange carrying two axially spaced apart rows of raised printing symbols, such as letters, numbers, punctuation, etc., each pair of side by side raised symbols being identical and disposed with their center lines extremely accurately equidistant from the web center plane and also accurately equidistant from the nearest adjacent edge of the rim 730, as shown by representative actual values on FIGURE 5.
  • the edges of rim 730 are fiat and are accurately disposed in parallel planes normal to the wheel axis.
  • the true axial dimension of the rim T-flange 730 is 0.2000" which is the distance of space required for two standard teletypewriting symbols, and this dimension is held to an extremely close tolerance range of $00005". This tolerance value is necessitated to prevent a buildup of a 72 character line, space error in an assembled drum. If the center line spacing of each of the two rows of characters is maintained within tolerances of :0.003 the overall character space tolerance of each character relative to adjacent characters and of the entire line of characters will be well within the acceptable limits.
  • the five-unit Baudot code permits of thirty-two different code bit combinations and, using letters and figures shift functions, sixty-four characters can be realized. Accordingly, in the exemplary printer, sixty-four positions are provided around the periphery of each type wheel rim 730 and all characters are accurately located at specific angular positions. A layout portion of a wheel rim is seen in FIGURE 4.
  • an index slot 726 is made in the web 724 of each wheel, the slot center line being aligned with one and the same specific character on all wheels.
  • the web center holes 731 of all Webs are also accurately located and are dimensioned to provide a smooth guided coaxial fit on the drum shaft 723.
  • an intermediate length 733 of drum shaft 723 is dimensioned to fit the center holes 731 of the type wheels 722. Both ends of the intermediate shaft section 733 are threaded as indicated at 734.
  • a suitable number (36- or 38) of wheels 722 are placed on the shaft 723, indexed to align the same characters on all wheels and clamped together by two end clamping plates 735, adjacent spacers 736 and nuts 737, the latter being threaded and torqued very tightly on the threaded ends of the intermediate shaft section 733.
  • the center holes 738 of clamp plates 735 are the same size as the type wheel center holes 731 and also have a smooth eoaxially locating fit on drum shaft intermediate portion 723.
  • the outer periphery of each clamp plate 735 is provided with a right angled annular flange 737 which faces the stack of type-wheels and fits with a slight radial clearance coaxially within the circumscribing axially extended end flange of the rim T-fiange 730 of the adjacent type wheel 722, abutting the wheel web 724 in annular contact.
  • a left hand bearing retainer assembly 742 which carries a bearing 743 in a socket 744, is placed over the left hand reduced diameter end 745 of the drum shaft 723 with the inner race of the bearing 743 against a shoulder 746 formed between the shaft end 745 and the shaft intermediate section 733.
  • a somewhat. similar right hand bearing retainer assembly 747 and shaft bearing are placed over a right hand reduced end portion 776 of the drum shaft 723.
  • Right hand bearing assembly 747 includes an integral clock head mounting plate 748, which serves to rigidly mount the printer clock monitor heads 180, 184 and 186, etc.
  • left and right hand record medium feed wheels 753 and 754 with associated ring gears 755 and 756, are placed on external bushing sleeves 757 and 758 integral with the associated bearing retainers.
  • the feed wheel gears 755, 756, are clamped to the respective feed wheels 753 and 754 by screws and split, annular ring clamping plates 759 which fit into and ride in grooves 760 in the bearing retainer body to axially maintatin the feed wheels 7523 and 754 in position adjacent each end of the drum 704.
  • a rubber O-ring 761 is stretched over the periphery of each feed wheel 753, 754 and fitted into half circle grooves 762 in the periphery of its feed wheel, and then cut or ground down almost even with the feed wheel periphery to serve as a friction band to engage and line feed the page record medium, by means to be hereinafter described. If desired, the O-ring 761 may be cemented in the groove 762 but it is not necessary. Note, the feed wheels are now rotatably mounted on the bearing retainers which will be clamped in adjacent printer frame end plates 720 and 721 and the drum 704 is rotatably mounted relative to the bearing retainers, completely independent of the record feed wheels 753 and 754.
  • the printer motor (not shown) is mounted on the inside of frame plate 720 with its shaft 772 projected through the plate and carrying a drive gear 773.
  • a gear tooth drive belt 774 meshes with motor gear 773, drum gear 770 and a carriage return clutch input gear and when the printer motor is energized the drum 704 will continually rotate.
  • the clock wheel 706 is non-rotatably secured to the right hand drum shaft end 776, and has peripheral reference notches 777 properly located relative to the angular positions of the print characters on the drum 704.
  • the clock wheel 706 rotates with the print drum 704 and as it rotates, the moving notches vary the reluctance of bar type magnets located in the clock monitor head coils 180-186 inducing appropriate current pulses into associated transistor amplifiers, as described in the aforenoted parent application.
  • each typewheel comprising:
  • a data processing drum printer comprising:
  • each typewheel having:
  • a flanged outer peripheral annular rim having a T-shape in radial cross section, and a thin coaxial locator Web portion;
  • the width of the rim flange on each typewheel being made to equal dimensions in all typewheels, held to a close manufacturing tolerance on the order of +0.0005 inch.
  • each typewheel web portion being centrally apertured to provide a coaxial locator and having an eccentric aperture with edge means accurately located relative to said type symbols to enable accurate angular assembly of said plurality of typewheels.
  • a drum printer print drum having an axis and com prising: a plurality of individual rings, each ring being a print wheel having an inner radial disc-like web with an outer periphery and having printing symbol elements located around said outer periphery, said rings assembled as a laminated drum with at least the major extent of said radial webs of adjacent ones of said rings being spaced apart; said rings having abutment portions extending axially from said webs and disposed closer to said outer peripheries than to said drum axis with said abutment portions on adjacent ones of said rings being in pressed engagement with each other; and clamping means engaging and exerting opposed force on the ones of said rings constituting the end rings in said drum thereby transmitting axially directed pressure through said rings at said abutment portions to facilitate maintenance of said rings in a predetermined position relative to each other with lines of said printing symbol elements extending across the outer peripheral surface of said laminated drum.
  • each ring is made from lightweight material and includes a plurality of lightening holes.
  • each ring has a T-shaped radial cross-section with the circular peripheral portion carrying the printing symbol elements constituting the cross flange of the T-shaped section.
  • a multiple character print drum said drum being assembled from a plurality of coaxial typewheels, each typewheel including a radially extending web having a center hole, raised type symbols at the periphery of said web, and axially extending flange means integral with said web and spaced radially outward a substantial distance from said center hole, said flange means of adjacent typewheels being in pressed abutment with each other, and clamping means transmitting axially directed clamping pressure through said flange means causing axially directed pressure abutment between adjacent typewheels for facilitating maintenance of said typewheels in predetermined alignment relative to each other.

Landscapes

  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Supply And Installment Of Electrical Components (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Handling Of Cut Paper (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Communication Control (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Unwinding Webs (AREA)
  • Handling Of Sheets (AREA)
US481796A 1962-04-03 1965-08-23 Drum series print member construction Expired - Lifetime US3327626A (en)

Priority Applications (18)

Application Number Priority Date Filing Date Title
GB1053727D GB1053727A (enrdf_load_stackoverflow) 1962-04-03
GB1053722D GB1053722A (enrdf_load_stackoverflow) 1962-04-03
GB1053721D GB1053721A (enrdf_load_stackoverflow) 1962-04-03
GB1053725D GB1053725A (enrdf_load_stackoverflow) 1962-04-03
GB1053723D GB1053723A (enrdf_load_stackoverflow) 1962-04-03
GB1053724D GB1053724A (enrdf_load_stackoverflow) 1962-04-03
GB1053726D GB1053726A (enrdf_load_stackoverflow) 1962-04-03
DE1963S0100341 DE1462006A1 (de) 1962-04-03 1963-04-01 Blattdrucker zum Empfang elektrischer Telegraphieschrittgruppen
DES84508A DE1229135B (de) 1962-04-03 1963-04-01 Schaltungsanordnung zur Bereitstellung elektrischer Telegraphieschriftgruppen
DES107732A DE1295606B (de) 1962-04-03 1963-04-01 Drucktrommel fuer Trommeldrucker
DES100338A DE1295607B (de) 1962-04-03 1963-04-01 Codieranordnung fuer die Tastatur eines Fernmeldegeraetes
DES100339A DE1290165B (de) 1962-04-03 1963-04-01 Magnetbandaufzeichnungsvorrichtung, insbesondere zur Aufzeichnung und Wiedergabe elektrischer Telegraphieschrittgruppen
FR930259A FR1378834A (fr) 1962-04-03 1963-04-03 Perfectionnement à la télégraphie
US481796A US3327626A (en) 1962-04-03 1965-08-23 Drum series print member construction
US481795A US3304366A (en) 1962-04-03 1965-08-23 Communications equipment printer
US481798A US3289189A (en) 1962-04-03 1965-08-23 Apparatus for feeding and stepping a magnetic tape
US481799A US3296370A (en) 1962-04-03 1965-08-23 Communications equipment transmitter and tape recorder
US481797A US3296369A (en) 1962-04-03 1965-08-23 Communications equipment keyboard

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US184820A US3280256A (en) 1962-04-03 1962-04-03 Communication equipment set, keyboard, printer and recorder
US481797A US3296369A (en) 1962-04-03 1965-08-23 Communications equipment keyboard
US481795A US3304366A (en) 1962-04-03 1965-08-23 Communications equipment printer
US481796A US3327626A (en) 1962-04-03 1965-08-23 Drum series print member construction
US481798A US3289189A (en) 1962-04-03 1965-08-23 Apparatus for feeding and stepping a magnetic tape
US481799A US3296370A (en) 1962-04-03 1965-08-23 Communications equipment transmitter and tape recorder

Publications (1)

Publication Number Publication Date
US3327626A true US3327626A (en) 1967-06-27

Family

ID=27558754

Family Applications (5)

Application Number Title Priority Date Filing Date
US481796A Expired - Lifetime US3327626A (en) 1962-04-03 1965-08-23 Drum series print member construction
US481799A Expired - Lifetime US3296370A (en) 1962-04-03 1965-08-23 Communications equipment transmitter and tape recorder
US481795A Expired - Lifetime US3304366A (en) 1962-04-03 1965-08-23 Communications equipment printer
US481798A Expired - Lifetime US3289189A (en) 1962-04-03 1965-08-23 Apparatus for feeding and stepping a magnetic tape
US481797A Expired - Lifetime US3296369A (en) 1962-04-03 1965-08-23 Communications equipment keyboard

Family Applications After (4)

Application Number Title Priority Date Filing Date
US481799A Expired - Lifetime US3296370A (en) 1962-04-03 1965-08-23 Communications equipment transmitter and tape recorder
US481795A Expired - Lifetime US3304366A (en) 1962-04-03 1965-08-23 Communications equipment printer
US481798A Expired - Lifetime US3289189A (en) 1962-04-03 1965-08-23 Apparatus for feeding and stepping a magnetic tape
US481797A Expired - Lifetime US3296369A (en) 1962-04-03 1965-08-23 Communications equipment keyboard

Country Status (4)

Country Link
US (5) US3327626A (enrdf_load_stackoverflow)
DE (5) DE1229135B (enrdf_load_stackoverflow)
FR (1) FR1378834A (enrdf_load_stackoverflow)
GB (7) GB1053723A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485164A (en) * 1966-12-20 1969-12-23 Gen Electric Information Syste Mounting type carriers on a shaft
US20150239076A1 (en) * 2012-09-17 2015-08-27 Siemens Aktiengesellschaft Large transmission gearwheel and process for producing a large transmission gearwheel

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US3405402A (en) * 1964-03-18 1968-10-08 Wiltek Inc Synchronized incremental drive for magnetic tape recorder-reproducer
US3357002A (en) * 1964-03-18 1967-12-05 Whitek Inc Magnetic tape information storage and retrieval system
US3419678A (en) * 1965-04-26 1968-12-31 Clary Corp Data printing system
US3453379A (en) * 1965-07-29 1969-07-01 Lawrence Holmes Jr Communication system
US3457368A (en) * 1965-11-15 1969-07-22 Bell Telephone Labor Inc Code character keyboard sender
CH474925A (de) * 1967-04-26 1969-06-30 Hasler Ag Tastengesteuerter Fernschreibsender
US3550151A (en) * 1967-10-12 1970-12-22 Universal Data Acquisition Co Recording medium drive mechanism
US3513441A (en) * 1967-10-16 1970-05-19 Clary Corp Verification system
FR2006425A1 (enrdf_load_stackoverflow) * 1968-04-18 1969-12-26 Olivetti & Co Spa
GB1182879A (en) * 1968-05-30 1970-03-04 Creed & Co Ltd Improvements in Data Transmitting Apparatus.
US3568183A (en) * 1968-07-09 1971-03-02 Gen Electric Keyboard synchronized toned generator
US3651259A (en) * 1968-11-12 1972-03-21 Mite Corp Keyboard operated telegraph transmitter using reed switches and magnetic shunts
US3575589A (en) * 1968-11-20 1971-04-20 Honeywell Inc Error recovery apparatus and method
US3623068A (en) * 1969-01-08 1971-11-23 Ibm Serving display functions by means of coded space information
US3582904A (en) * 1969-02-27 1971-06-01 Sine Qua Non Inc Portable data terminal
US3568905A (en) * 1969-05-09 1971-03-09 Fairchild Camera Instr Co Tape feeding retrace mechanism
US3651917A (en) * 1969-05-12 1972-03-28 Burroughs Corp Keyboard mechanism and associated code converting circuitry
JPS513455B1 (enrdf_load_stackoverflow) * 1970-04-13 1976-02-03
US3688058A (en) * 1970-08-28 1972-08-29 Microdyne Inc Incremental data-processing sprocketed tape deck
US3889294A (en) * 1970-09-02 1975-06-10 Midwestern Instr Inc Means for recording multi-bit character data
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US20150239076A1 (en) * 2012-09-17 2015-08-27 Siemens Aktiengesellschaft Large transmission gearwheel and process for producing a large transmission gearwheel
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Also Published As

Publication number Publication date
DE1295606B (de) 1969-05-22
GB1053724A (enrdf_load_stackoverflow)
US3289189A (en) 1966-11-29
GB1053722A (enrdf_load_stackoverflow)
US3304366A (en) 1967-02-14
GB1053726A (enrdf_load_stackoverflow)
GB1053727A (enrdf_load_stackoverflow)
US3296369A (en) 1967-01-03
DE1295607B (de) 1969-05-22
DE1290165B (de) 1969-03-06
US3296370A (en) 1967-01-03
DE1229135B (de) 1966-11-24
GB1053721A (enrdf_load_stackoverflow)
GB1053723A (enrdf_load_stackoverflow)
GB1053725A (enrdf_load_stackoverflow)
FR1378834A (fr) 1964-11-20
DE1462006A1 (de) 1970-01-22

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