US1857786A - Telegraph printer and the like - Google Patents

Telegraph printer and the like Download PDF

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Publication number
US1857786A
US1857786A US392804A US39280429A US1857786A US 1857786 A US1857786 A US 1857786A US 392804 A US392804 A US 392804A US 39280429 A US39280429 A US 39280429A US 1857786 A US1857786 A US 1857786A
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US
United States
Prior art keywords
shift
bars
permutation
cam
stop
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
US392804A
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English (en)
Inventor
Howard L Krum
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.)
AT&T Teletype Corp
Original Assignee
Teletype 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
Application filed by Teletype Corp filed Critical Teletype Corp
Priority to US392804A priority Critical patent/US1857786A/en
Priority to GB30764/31A priority patent/GB391855A/en
Priority to FR726150D priority patent/FR726150A/fr
Priority to DEC45691D priority patent/DE574368C/de
Application granted granted Critical
Publication of US1857786A publication Critical patent/US1857786A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H04L17/22—Apparatus or circuits at the receiving end using mechanical translation and type-bar printing

Definitions

  • the invention relates to telegraphprinters and like apparatus which are operative automatically in response to signals such, for exam 1e, as those of the well-known Baudot co e, in which the characters are represented by rmutations of a definite number (usual- 1y die) of two different conditions.
  • Such apparatus is controlled by selecting mechanism which usually comprises a set of permutation members correspondin in number to the units of the code, and w 'ch are positloned 1n difiercnt combinations in response to the code permutations.
  • selecting mechanism which usually comprises a set of permutation members correspondin in number to the units of the code, and w 'ch are positloned 1n difiercnt combinations in response to the code permutations.
  • w 'ch are positloned 1n difiercnt combinations in response to the code permutations.
  • a case shift mechanism to provide for both letters and figures,
  • the present invention provides an improved case shift mechanism for telegraph printers or like apparatus, having three or more sets or groups of type or selectable character elements.
  • the improved case shift mechanism has three positions or conditions for eifectin the operation of three different oups o type or the like, and means is provi ed which is so controlled by the permutation selector mechanism that it is efl'ective in each of three special settings of the selectors to change the case shift mechanism to a corresponding condition from either of its other conditions.
  • Fig. 1 is a plan view, with parts broken 'away, of a telegraph printer with the present improvement applied thereto.
  • Fig. 2 is a detail view in elevation of the parts shown in section on the'line 22 of Fig. 1.
  • FIG. 3 is a detail view of the parts shown in section on the line 33 of Fig. 1.
  • Figs. 4, 5 and 6 are detail views on the lines 4- -4, 5-5 and 6-6 respectively, of Fig. 1.
  • Figs. 4, 5 and 6' are detail views on the line a of Fig. 1, of the parts shown in different positions.
  • Fig. 7 is a detail view with parts shown in section on line 7-7 of Fig. 1.
  • Fig. 8. is a detail 'view, with parts shown in section, of the operating or striker mechanism and the letter-space feed mechanism.
  • Fig. 9 is a detail plan view, with parts shown in section, of a portion of the operatin or striker mechanism.
  • ig. 10 is a detail view, with arts shown in section, on the line 1010 of ig. 8.
  • the improved case shift mechanism is shown applied and is particularly adapted to a telegraph printer such as set forth in United States Letters Patent No. 1,745,633, dated Feb. 4, 1930.
  • the printer is provided with a set of type bars 10 which are connected to a supporting segment 11 by a pivot rod 12, the segment being'mounted on posts which rise from a base plate 13. Toothed segments on the pivoted ends of the type bars are engaged by rack teeth formed upon the lower ends of corresponding actuating bars 14, the
  • the striker bar is segmental in form and is fixed to the upper end of a verticallymovable plunger 19 which is slidably mounted in suitable bearings in an upright bracket or frame member 21.
  • the plunger and striker i -bar are operated by a bell-crank lever havin a horizontal arm 22, the end of which exten 5 within a seat in the plunger, and a vertical arm 23 provided with a roller which is engaged by a cam 24 on a vertical actuating shaft 25.
  • This shaft is connected by intermeshin spiral gears 26 (see Fig. 1) to the shaft 0 a small driving motor 27, and is continuously rotated when the printer is in operation.
  • a spring 22' see Fig.
  • the platen by gears 32.
  • the platen is fixed to a i shaft 33 which is rotatabl mounted in brackets 34 an 35 projecting upwardly from the base plate.
  • the shaft 33 extends through openings in the arms of the U-shaped bracket 29 and is free to rotate therein, but the shaft and platen shift. in axial direction with the frame to effect the printing of any one of the sets or groups of type provided upon the type bars.
  • a pinion 36 on the rear end of the shaft engages, in any of the adjusted positions of the shaft, w1th a long gear or pinion 37 on the forward end of a shaft 38.
  • the latter is provided on its rear end with a ratchet wheel 39 (see Figs. 8 and 10) which is arranged to be engaged by a feed pawl 40, pivotally mounted on an operating lever 41 and spring-held in engagement with the ratchet wheel.
  • the lever 41 is pivoted between its ends, and its upper end, which is provided with a roller, is spring-held in engagement with a cam seat 42 formed in the plunger 19.
  • the permutation or selector bars 20 are set in the manner set forthin said patent, or b other well-lmown means, in diiferent'combmations in response to the five selecting intervals or units of the respective code signals.
  • the notches of the bars are aligned behind the upper end of one of the selectable actuating bars 14 if a character is to be printed.
  • the clutch controller cam 24 is thrown into operation to raise and lower the striker bar 18.
  • This shift is effected by a'horizontally disposed bell-crank lever 45 mounted on an upright pivot stud 46 and havin a rounded inner end which engages an 0 set 47 on the plate 48 which is connected to the frame 29 by screws 48.
  • these screws extend through slots in the plate 48 so that the position of the latter can be adjusted.
  • the bell-crank is in oneway engagement with the lug 47 on the shiftplaten 30 will each be held in one or the other .of its extreme positions, as shown by dotted lines in Fi 1, to permit or effect the operation of eit er the outermost or innermost group of type.
  • t e cam will hold the parts as shown in full lines in Figs. 1 and 5', to effect or permit the operation of the intermediate group i of type.
  • Theshaft 51 upon which the shifter cam 50 is mounted is driven from the shaft 25 by intermeshing gears 53 so that 'it is continuously rotated when the machine is in operation.
  • the cam is keyed to a sleeve 54 which awn-rec is loose on the shaft andd-riven through the medium of a friction clutch.
  • Three controlling stop discs 55, 56 and 57 are also keyedto the sleeve 54, being held a art by suitable spacing collars. The clutch or rotating the sleeve and the cam and stop. disks thereon,
  • the stop dogs 62 are mounted on a pivot shaft 63 carried by a bracket 63'.
  • the dogs extend upwardly from the shaft 63 and are provided with hooks 64 at their upper ends which are arranged to engage projecting lugs 65 on the stop disks.
  • the stop dogs are loose on the shaft 63, but collars 66 and a spring 67 thereon tend to exert some friction on the dogs to hold them in the position in which they are set. r
  • the stop dogs 62 are provided with tail pieces 68 which extend inwardly through slots in the bracket 63 and are arranged to be engaged by projections 69 on the lower ends of three selectable shift elements 70.
  • the latter are arranged at one end of the series of selectable actuatin bars 14 which operate the type bars and l' e the actuating bars are adapted to be selected by the permutation bars 20 and be moved vertically, when selected, by the striker bar 18.
  • the selectable shift elements or bars 70 are normally held out of engagement with the permutation bars 20 by the striker bar 18 and springs 16 normally hold the bars 70 in lowermost position and serve to effect their engagement with the permutation bars when the striker bar 18 is raised.
  • the shift bars or elements 70 are guided in their movement by the segmental bar 15 and by rollers 71 mounted on the pivot rod 12.
  • One of the stop dogs is always in position to permit the operation of one of the groups of type, but to change from such oug to another, one of the other dogs is se ecte and shifted to operative position as described. When so selected and shifted to operative position, it will, through the medium of the levers 72 and 73, release whichever of the other dogs is in operative position and permit the rotation of the shifter cam 50 until it is arrested. by the selected dog.
  • the stop disk 56 which, when engaged by its dog, holds the platen in position to effect theoperation of the intermediate group of type, is provided with two stop lugs 65 and, as stated, the cam 50 is so shapedthat in either of two positions substantially one-half revolution apart, it
  • the case shift mechanism permits the change from any one of the three groups of type to either of the others by a single operation and tion mechanism. It will also be noted that as -response to asingle setting of the permutato change from the intermediate group to the faces of the hooks 64 on the stop dogs are disposed slightly above a horizontal plane ex-. tending through the, axis of the shaft 51, and these faces are disposed in planes which are substantially radial with respect to such axis.
  • the shift elements or bars 70 are provided with inwardl extending pro'ections 74 at their lower on which extend neath onabail76w bail extends beneath one ments is selected and operated,the bail 75 rocked and the latch 81 is moved by its spring a ainst the lower end of the feed lever 41.
  • a plurality of devices to be selected arranged 1n groups, more than two, shift mechanism havlng a corresponding number ofcondltlons to predetermine the group to be selected, a set of independently movable permutation selectors adapted to be positioned in different combinations in response to received signals to'select the individual devices of the predetermined group, and meanscontrolled by each of certain special settings of said selectors for changing said shift mechanism to a corresponding condition from any of its other conditions.
  • a selector mechanism for telegraphic receivers and the like the combination of a plurality of selectable devices arranged in groups, more than two, a shift mechanism having a corresponding number of conditions to predetermine the group to be selected, and arranged to be maintained in any one condition during repeated selections of the corresponding group, a set of independently movable permutation selectors arranged to be positioned in diiferent'combinations and in certain settings to select the devices of the predetermined group, and means controlled by each of certain other settings ofsaid permutation members for changing the shift r tions of sai mechanism to a corresponding condition from a plurality of any of its other conditions. 3.
  • aselector mechanism In aselector mechanism,
  • selectable devices arranged in a set of independently movable permutation members arran ed to be positionedin different combinations, and, 1n each of certain three groups,
  • shift elements one for each group selected by certain other special settings 0 a saidselectors, of said shift elements for changin the mechanism from either one of two con itions to a third condition and thereby confine the selec-' tions to the devices of the corresponding 4.
  • a telegra h printer, type printing means, case shi mechanism therefor including three selectable elements, means, in-
  • a case shift mechanism having three conditions for selecting a corresponding number of type groups, controlling selector mechanism and means controlled b each of three different operaselector mechanism for changing the shiftmechanism to a corresponding condition from either of its other two conditions, said means including a'set of three selectable shift controllers, a selected one of which is maintained in operative condition.
  • a selector mechanism for telegraph printers the combination of three grou s of devices to be selected, a case shift mem er having three positions in which it isoperative to predetermine the group of devices to be selected, three shift controlling elements, a set of independently movable permutation members adapted to be positioned in different combinations for selecting said devices and said elements, and means, including a shift controller individual to and selectively controlled by each of said elements, for moving said shift member to one operative position from either of its other positions.
  • a selector mechanism for automatic printers and the like three groups of selectable devices, -case shift mechanism having three controlling devices for placing and maintaining the shift mechanism in any one of a corresponding number of different conditions to predetermine the group to be selected, a set of permutation selectors, and means controlled by each of three different settings of said selectors for effecting the operation of the corresponding controller and for disabling the other two controllers.
  • a selector mechanism for automatic '45 devices operative and for disabling the like, three groups of selectable devices, case shift mechanism havi three controlling devices for placing an maintaining the same in any of a corresponding number of difierent conditions to predetermine the group, to be selected, selectable actuators individual to said controllers, and means operated by each controller actuator for disabling either of the other controllers.
  • a selector mechanism for telegraph printers and the like a set of permutation members adapted to be positioned in different combinations, in response to received signals, a plurality of character determining elements and three case shift elements selectivel controlled by said set of permutation mem ers, a case shift member and three printers and controllers for maintaining said shift memstop devices-for arresting and holding sai ber in a correspondmg number of different operative positions, each of said selectable shift elements being arranged to effect the operation of one of said controllers and. disable the other two.'
  • a selector mechanism for telegraphprinters and. the like a set of permutation members adapted'to be positioned in different combinations in response to received signals, a plurality of character determining elements and three case'shift elements selectively controlled by said set of permutation members, a case shift member, means tending to move said member, and three controlling member in a correspondin number of operative positions, each of said selectable shift elements being arranged to render one of said stop devices operative and disable the other two.
  • a. case shift member means constantly tending to move said member,'a set of three stop devices for arresting and maintaining said member in a corresponding number of different operative positions, and selective meansv for rendering any one of said stop other two.
  • a case shaft mechanism including a rotary actuating member, and cooperative stop devices for arresting said member in different positions to place and maintain the shift mechanism in different operative conditions, and means for selectively operating said stop devices.
  • a set of controlling permutation selectors a case shift member, a rotary actuating device for said shift member, means constantly tending to ,rotate said actuating member, and stop ping means selectors for arresting said actuating device to thereby place and maintain said shift member in a plurality of operative positions.
  • a'set 16 In a telegraph printer or the like a'set 16.
  • a case shift member, arotary actua' cam for said member means constantly ten to romember in
  • a set of permutation members selectively controlling said elements, a reciprocating case shift member, a rotating actuator constantly tending to move said case shift member, and a plurality of stops selectively controlled by said permutation members and cooperating with said rotary actuator to arrest, and maintain said shift member in; corresponding operative positions.
  • a set of permutation members selectively controlling said elements, a reciproca case plurality of character determining elements,
  • shift member a rotary, motor-driven cam for reciprocating said member, two stops for arresting said cam and said member with the latter in operative position at or adjacent the ends res ectively of its path of movement, a thir stop for arresting said cam in two difierentpositions with said member in an intermediate operative position, and means for selectively operating said stops.
  • a telegra h printer or the like a purality of selectable actuating and shift con trolling elements, a setof permutation members for selectingsaid elements for operation,
  • a case mechanism including a setof three shift controllers, each arranged, when operative, to
  • a case shift mechanism includinga set of at least three shift controllers for positioning the shift mechanism in any one ofa corresponding number of different conditions, means for selectively effecting the operation of an one of said controllers and for maintaining t e same in o erative condition until the o eration of anot er of said controllers is e ected, and means effective, upon the operation of an one ofsaid'controllers, to return either 0 the other previously selected controllers to in'- operative condition.
  • a telegraph printer In a telegraph printer, three groups of type, a paper platen having an impact surface common to all of said groups and normally maintained in one of three, different positions to effect the operation of one group, a selector mechanism responsive to received code combinations of impulse conditions, and three shift controllers operative, under control of said selector mechanism, to effect the shift of said platen directly from ony one of its threepositions to either of the other two in response to a sin le code combination.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Labeling Devices (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Mechanical Operated Clutches (AREA)
  • Transmission Devices (AREA)
US392804A 1929-09-16 1929-09-16 Telegraph printer and the like Expired - Lifetime US1857786A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US392804A US1857786A (en) 1929-09-16 1929-09-16 Telegraph printer and the like
GB30764/31A GB391855A (en) 1929-09-16 1931-11-06 Improvements in or relating to telegraph printing and like selective apparatus
FR726150D FR726150A (fr) 1929-09-16 1931-11-10 Mécanisme de changement de caractères pour appareils imprimeurs télégraphiques
DEC45691D DE574368C (de) 1929-09-16 1931-11-28 Typendruck-Telegraphenapparat mit drei oder mehr Gruppen von Typen und einer Zeichenwechsel-Vorrichtung mit einer entsprechenden Zahl von Einstellmoeglichkeiten

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US392804A US1857786A (en) 1929-09-16 1929-09-16 Telegraph printer and the like
GB30764/31A GB391855A (en) 1929-09-16 1931-11-06 Improvements in or relating to telegraph printing and like selective apparatus
FR726150T 1931-11-10
DEC45691D DE574368C (de) 1929-09-16 1931-11-28 Typendruck-Telegraphenapparat mit drei oder mehr Gruppen von Typen und einer Zeichenwechsel-Vorrichtung mit einer entsprechenden Zahl von Einstellmoeglichkeiten

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US1857786A true US1857786A (en) 1932-05-10

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US392804A Expired - Lifetime US1857786A (en) 1929-09-16 1929-09-16 Telegraph printer and the like

Country Status (4)

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US (1) US1857786A (fr)
DE (1) DE574368C (fr)
FR (1) FR726150A (fr)
GB (1) GB391855A (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE482365A (fr) * 1946-04-30

Also Published As

Publication number Publication date
FR726150A (fr) 1932-05-21
DE574368C (de) 1933-04-19
GB391855A (en) 1933-05-08

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