US1892071A - Typewriting machine - Google Patents

Typewriting machine Download PDF

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Publication number
US1892071A
US1892071A US581702A US58170231A US1892071A US 1892071 A US1892071 A US 1892071A US 581702 A US581702 A US 581702A US 58170231 A US58170231 A US 58170231A US 1892071 A US1892071 A US 1892071A
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United States
Prior art keywords
stop
key
lever
levers
column
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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
US581702A
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English (en)
Inventor
Lewis C Myers
George F Handley
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.)
Royal Typewriter Co Inc
Original Assignee
Royal Typewriter Co Inc
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 Royal Typewriter Co Inc filed Critical Royal Typewriter Co Inc
Priority to US581702A priority Critical patent/US1892071A/en
Priority to GB324/32A priority patent/GB386787A/en
Priority to DER83973D priority patent/DE642964C/de
Priority to US634968A priority patent/US1926165A/en
Application granted granted Critical
Publication of US1892071A publication Critical patent/US1892071A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/02—Key actions for specified purposes
    • B41J25/18—Tabulating

Definitions

  • This invention relates to new and useful improvements in typewriting machines generally, although more particularly to a column stop mechanism and a decimal tabular mechanism therefor.
  • a typewriting machine with a series of column stops which are arranged at the rear of the machine, and with a column or tabular stopset key located within the keyboard or the machine; to mount said column stops on a supporting frame for swinging movements in a direction fore and aft of the machine; to automatically and jrictiona-lly retain each column stop in either its active or inactive position; to provide a keyboard including a series of decimal tabulating keys which are respectively connected to a corresponding number of stop levers arranged in cooperative relation with the column stops; to provide means whereby one only of the decimal keys may be depressed to actuate one only of the stop levers; to provide a tabular key which is also located in the keyboard and which key may be de pressed to operate said particular stop lever without afiecting the associated decimal tabulating key or vice versa; and to provide a U normally inoperative stop restoring device adapted to be manually moved forwardly into position to be engaged by the column stops during movement of the carriage
  • Figure 1 is a vertical longitudinal section through a typewriting machine embodying our invention, certain parts being omitted for clearance and others being shown in elevation,
  • Figure 2 is a rear elevation of the machine
  • Figure 3 is a vertical sectional view showthe release of the carriage escapement mechanism and alsoshowing one of the denomination stop levers in engagement with oneof the column stops, I
  • Figure 4 is a rear elevation thereof. parts thereof being shown in section,
  • Figure 5 is an enlarged vertical sectional view showing one of the column stops in its active or operating position, and the stop restoring means in its normal or inactive position,
  • Figure 6 is a somewhat similar View but showing the column stop in its normal or inactive position, the actuating finger for moving the column stop to its active or operating position, and the stop restoring means in operative position,
  • Figure 7 is a top plan view thereof
  • F igure 8 is a View similar to Figure 5 but showing the stop operating finger in position after it has moved the stop to its active position, the stop restoring device being shown in section,
  • Figure 9 is a top plan view thereof, the stops and the stop restoring device being shown in horizontal section,
  • Figure 10 is a perspective view'showing the application of the tie plate to the upper and lower rack bars which support the column stops,
  • Figure ll is a perspective View showing portions of the upper and lower rack bars which are respectively provided with transverse grooves for receiving the tieplate,
  • Figure 12 is a partial top plan view of the upper and lower rack bar assembly
  • Figure 13 is an enlarged longitudinal sectional view taken on the line l3l3 of Figure 8, I
  • Figure 14 is a planview partly in section of the keyboard arrangement
  • Figure 15 is a vertical sectional view showing the tabular key, a denominational key, and connections between said keys and one of the denomination stop levers, the view showing the tabular key in depressed po- Figure 18 is a view in elevation of the parts shown in Figure 17
  • Figure 19 is a perspective view of the rock shaft and levers mounted thereon for actuation either by the tabular key or by the denominational key,
  • Figure 20 is a perspective view of the rock shaft and showing its relation with another of the denominational keys and with another of the denomination stop levers
  • Figure 21 is a fragmentary perspective of the comb guide which is associated with the denominational keys.
  • the invention is illustrated as applied to the well known Royal machine but many of the features thereof are applicable to other typewriters.
  • the machine includes the usual main frame 1 which supports a non-shiftable track 2 upon wheel 9 is mounted to rotate with the pinion 8 and cooperates with the usual escapement dog not shown.
  • a column stop frame A which includesupper and lower rack bars 10 and 11 respectively. These bars are held in parallel spaced relation through the medium of end plates 12,12.
  • Each plate is provided with upper and lower angular recesses 13 and 14 to receive correspondingly'shaped extensions on the ends of 1;
  • Upper and lower clamping screws 15, 16 serve to clamp each plate 12 against the upper and lower bars.
  • Rigidly connected with each end plate 12 is an outwardly projecting threaded stud 17 having a flat u per surface which fits into a correspondmgly shaped opening in the adjacent end plate 4 of'the carriage.
  • Clam ing nuts 18, 18 are mountedon the threade stud 17 and are clamped against the opposite faces of the end wall 4 of the carriage.
  • the upper and lower stop bars 10- and 11 are rectangular in cross section.
  • the lower face *of the upper bar 10 is formed with a series of transversely 'wardly converging front and rear arms 21 distance between these ends is substantially equal to the width of the rack bar 10 so as to permit the stop to swing from an inactive forward position to an active rearward position or vice versa, the rounded ends of the arms constituting pivots or fulcra for the stop.
  • the lower ends of the legs 23, 24 are spaced apart a distance considerably greater than the width of the lower rack bar 11 so as to permit the stop being swung from one extreme position to the other, the legs coopcrating with the lower rack bar 11 to limit the swinging movement of the stop.
  • the height of the cross bar or bridge 25 of the stop is less than'the distance between the top wall I of the groove 19 and the bottom wall of the groove 20.
  • the lower edge of the bridge port1on 25 adjacent the rear leg 24 is provided with a fiat 26 which rests on the bottom wall of the groove 20 when the stop B is in its inactive or inoperative position, as shown in Figure 6.
  • the lower edge of the bridge portion 25 between the forward leg 23 and the flat 26 is formed with a recess 27 to form a clearance and thereby permit the free rearward swingingof the stop B to the position shown in Flgures 5 and 8. It is desirable to frictionally retain each stop B in each of its ex treme positions.
  • each stop B is provided with a spring 28'which is in the orm of a spring wire bent between its ends to form upper and lower spring arms 29 and 30 respectively, the bend of the spring engaging a headed stud 31 which is attached to the stop.
  • the arms 29, 30 extend forwardly between the upper and lower rack bars 10 and I1, and the free end of the lower arm 30 is provided with an offset 32 which is located in a seat 33 formed in the front edge of the stop.
  • the free end'of the upper arm 29 is curved upwardly and downwardly to form a cam which has sliding engagement with the lower face of the rack bar 10 when the stop B is in its active position as shown in Figure 5, and withthe lower front corner of the upper rack bar 10.when the sto B is in its inactive position as shown in Thus when the stop B is in its active position as shown in Figure 5, the lower angled edge of the bridge 25 between the front leg 23 and the ,flat' 26 is seated against the rear upper corner of the wall of the transverse groove 20 and is frictionally held thereag'ainstby the tension of the spring 28 due to the arm 29;
  • the stop B is capable of being rocked rearwardly to an active position or forwardly to an inactive position and that yieldable means are employed for automatically and frictionally retaining the stop in either of its extreme positions.
  • a tie plate 34 which is formed with upper and lower angular openings 35 and 36 respectively for receiving the upper and lower rack bars 10 and 11. lhe upper faces of the upper and lower rack bars 10 and 11 are respectively formed with transverse recesses 37, 38 for respectively receiving the upper walls of the openings 35 and 36.
  • the lower end of the plate 84 extends downwardly below the opening 36 and terminates in an arm 39 which underlies the lower rack bar ll.
  • a filler block 40 is disposed between the arm 89 and the lower face of the rack bar ll and a clamping screw 41 passes through the arm 39 and the block 46 and is threadably engaged in the lower rack bar ll, thereby securely retaining the rack bars 10, 11 and the tie plate 3 against relative movement.
  • the column stops B are normally disposed in their forwardly swung or inactive positions, and in order to swing predetermined stops outwardly to active positions prior to stopping the carriage in corresponding col-, umn positions, we have provided atabular stop set key C which when depressed causes a pusher linger to be moved rearwardly into engagement with the registering column stop B and thereby swing the latter rearwardly into active posit-ion.
  • 'lhis tabular stop set key C is located in the keyboard and at the right'thereof, as shown in Figures 1 and ll.
  • the key C includes a lever 42 which extends rearwardly and is 'fulcrumed upon a cross rod 43 supported on the main frame 1 and the rear end of this lever terminates in an upwardly extending rock arm 44, to the upper end of which is connected the front end of a pull link 45, the rear end of said link being pivotally connected to a depending arm 46 of a bell crank lever l7 which is fulcrumed on a pivot screw 48 mounted ina lug 49 fixed to the side wall of the main frame 1.
  • bell crank lever 47 includes a rearwardly extending arm 50 which is slotted as at 51v to receive one end of a lever 52 which is pivoted intermediate its ends as at 53 to the rear wall of the main frame 1.
  • the other end of the lever 52 is pivotally connected as at 54 to the lower end of a thrust link 55, the upper end of said link being pivotally connected as at 56 to a forwardly ext-ending arm 57 of a bell crank lever 58, the other arm of the lever extending upwardly and forming a stop actuating or setting finger 59, the bell crank lever 58 being fulcrumed at its angle as at 60 to a bracket 61 which is rigidly secured to the rear wall of the main frame 1 of the machine.
  • the tabular stop setkey C is held in its normal position, as shown in Figure 1, by a coil spring 62. It will, therefore. be observed that when the tabular stop set key is depressed, the pull link will rock the bell crank lever t7 and thereby lower the arm thereof. This downward movement of the arm 5O'w1ll swing the lever so as to move the thrust link upwardly thereby rocking the stop actuating finger 59 rearwardly to engage the registering column stop B and swing the latter rearwardly to its active or operating position.
  • T he ordinary column tabulating stop 68 is pivotally supported intermediate its ends as at 6 2 to the bracket 61 and is operated by a link 65 attached to the lower end thereof and is connected in the usual manner to a tabulator key lever D which is pivota llv mounted on the rod 43 and is disposed at the rig t hand end of the keyboard which as previously stated is in the usual place at the front of the machine.
  • A. spring 66 is connected to the tabula'tor key lever D and tends to normally support the lever in position.
  • A. spring 67 which is fast at one end to the bracket 61 normally holds the stop 68 in its forward position.
  • a carriage release lever 68 which is pivotally supported on the main frame ha an arm 69 extending forwardly under a ledge 70 on the rack bar 6 so that when the lever 68 is rocked, the rack is lifted out of engagement with the pinion 8 and the carriage 3 is free to move under the influence of the ordinary driving spring.
  • the lever 68 has a downwardly extending arm 71 which bears against the lower portion of the tabulating stop 63 so that when the latter is pulled forwardly, the lever 68 will be rocked and the carriage released from the escapement.
  • the denominational tabulatorstops E comprise levers 72, 73, 7a, 75, 76, 77, 78, 79, and 81. These levers are disposed vertically in rear of the main frame and are pivoted intermediate their ends on a horizontal shaft 82 mounted in the bracket 61, the upper ends of the levers forming the stops proper.
  • a bail 83 is mounted by arms 84, 84 on the shaft 82 and. these arms are connected by a cross bar 85 in the rear of the levers E.
  • the tabulating stop 63 has an abutment 86 ( Figure 3) which is adapted to be engaged by the bail 83.
  • a rock shaft 87 extends 3 transversely under the various key levers and has its ends j ournaled in bracket arms 88, 88 fixed to the main frame of the machine.
  • crank arm 89 Fixed to the right hand end of the rock shaft 87 is a crank arm 89 which normally extends upwardly and forwardly at an inclination and is provided with a rounded upper end 90, the crank arm being disposed directly below the tabulator key" lever D for engagement therewith.
  • crank arm 91 Fixed to the left hand end of the rock shaft 87 is a forwardly and downwardly extending crank arm 91 to which isrigidly secured a laterally extending crank pln 92 which underlies a forwardly extending arm 93 of a bell crank lever 94 which is loosely journaled on the rock shaft 87, said bell crank lever including a depending arm 95 to which the front end of a push link 96 is pivotally connected, the rear end of said link being pivotally connected to the lower end of the tabulaltor stop lever 72.
  • the tabulator key lever D When the tabulator key lever D is depressed, it will engage the rounded end 90 of the crank arm 89 and i engaged by the oncoming column stop B.
  • the lever 72 is yieldingly held in its normal position by means of a coilspring 97 which surrounds the front end of the link 96, the rear end of the spring being secured to the link and the front end being secured to an anchor rod 98 extending transversely of the machine and supported by the arms 88.
  • a horizontal series of denominational tabulator keys F Located in rear of the keyboard but forming a part thereof is a horizontal series of denominational tabulator keys F, preferably ten, there being one key-for each tabulator stop lever E, the keys F respectively comprising levers 99, 100, 101, 102, 103, 104, 105, 106, 107 and 108.
  • Each denominational key lever F is vertically disposed and is' provided intermediate its ends with an offset or stop .shoulder 109. J ournaled on the rock shaft 87 through the medium of a hub 110 is a forwardly extending rock arm 111 which is pivotally connected to the lower end of the denominational key lever 99.
  • the rock arm 111 overlies a crank pin 112 which extends laterally from the horiontal arm.93 of the bell crank lever 94.
  • a coilspring 113 extends around the hub 110 and has its rear end engaged under a cross .rod 98 secured to the main frame and disposed in rear of the rock shaft 82, the front.
  • Each of the denominational key levers -108 is connected at its lower end to a' forwardly extending arm 115 of a bell crank'lever 116 which through the'medium of a hub 117 is journaled on the rock shaft 87.
  • the downwardly extending arm 118 of each bell crank lever is pivotally connected to the forward end of a link 119, similar to the link 96, the rear end of. the link 119 being pivotally connected to the associated stop lever E.
  • each of the links 119 is provided with a spring 97 which functions to normally hold the denominational key, the associated stop lever, the bell crank 116 and the link 119 in their normal positions.
  • the denominational key levers F may be individually depressed without adecting any of the other key levers of that series.
  • a comb guide 120 as shown in Figures 1 and 21, is associated with the denominational key levers F in the usual manner, and
  • a stop guide 121 is also associated with said key levers for cooperation with the offset or stop shoulders 109 of said key levers to limit the upward movements thereof.
  • Our invention also includes a stop restoring device G which is manually movable for cooperation with the tabular stops B for returning the latter to their normal or inactive positions upon movement of the carriage in either direction.
  • lhis stop restoring device G is mounted on the main "frame 1 of the machine at a point in rear of the stops B.
  • the device G is supported on the upper end of the bracket -51 as shown in the drawings.
  • This device includes a Ushaped frame 122 including a top 123 having depending legs 124, 125 which are pivoted by a stud 126 and a pivot screw 127 to forwardly extending arms 128, 128 of a bracket 129 which is secured to the supporting bracket 61 by screws 130, as shown particularly in Figures 2, 7 and 9.
  • the axes of the pivots 1 26, 127 are in alinement and in a plane extending parallel with the rack bars 10 and 11 so as to permit the restoring device G to be swung toward and away from the column stops
  • the top 1 3 projects forwardly beyond the supporting legs and the forward edge or said top is formed into a camming surface having a high point 131 located centrally between the attaching legs 12 1, 125.
  • Two rollers 132, 133 are journaled on verticalaxes 134, 135 carried by the top 123. These rollers are disposed on opposite sides of the high point 131 or" the camming edge of said top, the camming edge projecting forwardly beyond said roll as clearly shown in Figure *4.
  • the high point 131 of the camming edge is intermediate the rolls 132, 133, and said rolls project forwardly beyond the camming edge at opposite ends thereof.
  • the rolls 132, 133 function to move easily the column stops B in their first or initial movement over the high points X of the cam surfaces on the cross bars 25 of said stops.
  • the leg 124 projects downwardly below the pivot stud 126 to form a stop arm 136 which is adapted to engage a fixed stop 137 fixed to the arm 128 of the attaching bracket 129 to limit the rearward swinging movement 01 the device asshown particularly in Figure 5.
  • a coil spring 138 has its upper end engaged with an ear 139 attached to the frame 122 and its other end engaged in an ear 140 secured to the attaching bracket 129.
  • This spring 138 functions to normally retain the restoring device G in its inoperative position with the arm 1136 hearing against the stop 137, as shown in Figure 5.
  • the arm 125 of the frame 122 extends below the pivot screws 127 and terminates in a-stop arm 1411 which is adapted, when the restoring device G: is swung forwardly to operative position, to engage the bracket 129 and thereby limit the forward movement of the device.
  • we have provided an upwardly extending fingerpiece 142 which is attached to the top 123 or the pivot frame 122.
  • the operator engages the iingerpiece 1 12 and swings the restoring device G forwardly so as to cause the stops B to first engage one or the other of the rollers 132, 133, depending on the direction or" movement of the carriage, and then to engage the high point 131 of the cam edge of the top 123, the parts being so arranged that the high point 131 or the cam will completely restore the column stops l3 to their normal positions.
  • the keyboard includes the usual letter and numeral keys H which respectively operate type bars 1- in the usual manner, the keys l-l being disposed forward of the denominational keys F and at the left oil the tabular stop set key "S, and the tabulator key 1).
  • a typewriting machine with a series or column stops which are arranged at the rear of the machine, and with a tabular stop set key located within the keyboard the machine; that said column stops are mounted on a supportin frame for swinging movements in a direction fore and or" the machine; that each column stop is automatically and trictionally retained in either its active or inactive position; that the key-; board includes a series of decimal tabulating keys which are respectively connected to a corresponding number of stop levers which cooperate with the column stops; that one only of the decimal keys may be depressed to actuate one only of the stop levers; that a tabular key also located in the keyboard may be depressed to operate said particular stop lever without affecting the associated decimal tabulating key or vice versa; and that a normally inoperative stop restoring device is adapted to be manually moved forwardly into position to be engaged by the column stops during movement of the carriage in either direction to thereby restore all of the column stops to their normal or inactive positions.
  • lVe claim 1 In a tabulating mechanism for typewriting machines, the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, a series of decimal key levers, a tabulator key, and operating connections between the respective decimal key levers and the stop levers and between the tabulator key and one only of the stop levers whereby the decimal key lever associated with the one stop lever and the tabulator key may be independently operated for actuating said one stop lever.
  • a tabulating mechanism for i typewriting machines the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, a series of decimal key levers, a tabulator key, separate operating connections between the decimal key levers and the respective stop levers including a separable connection between one decimal key lever and the associated stop lever, and operating con nections between the tabulator key and said associated stop lever including a separable connection whereby either said one decimal key lever or the tabulator key may be operated independently of the other.
  • a tabulating mechanism for typewriting machines the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, 9.- series of decimal key levers, a tabula- -tor key, separate operating connections between the decimal key levers and the respective stop levers, one of said operatmg connections including a push link and a separable connection between the link and the associated decimal key lever, and separable operating connections between the tabulator key and said push link.
  • a tabulating mechanism for typewriting machines the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, a series of decimal key levers, a tabulator key, a rock shaft, operatmg connections between the decimal key levers and the respective stop levers including bellcranks journaled on the rock shaft, one of -said operating connections including a sep- 5.
  • a tabulating mechanism for typewriting machines the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, a series of decimal key levers, a tabulator key, a rock shaft, a crank arm journaled on the rock shaft and having pivotal connection with one only of the decimal key levers, a bell crank lever j ournaled on the rockshaft and having a crank pin overlyin said crank arm, a push link connecting sai bell crank lever and one only of said stop levers, operating connections between the other decimal key levers and the other stop levers, a crank arm fixed to the rock shaft and having a crank pin overlying the bell crank lever, and a second crank arm fixed to the rock shaft and located directly under the' tabulator key and having a sliding contact therewith.
  • a tabulating mechanism for typewriting machines the combination with a main frame, of a carriage mounted on the main frame at the rear thereof, type bars movably mounted on the main frame for cooperation with the platen, key levers associated with v key and one only ofsaid stop levers and ineluding a part of the operating connections between said one stop lever and the associated decimal key lever.
  • a tabulating mechanism for typewrit-" ing machines the combination with a main frame, of a carriage including a platen mounted on the main frame at the rear thereof, type bars movably mounted on the main frame for cooperation with the platen, key levers associated with the type bars for operating the latter and arranged in a keyboard at the front of the main frame,'a series of column stops spaced apart at letter space intervals and independently mounted on the carriage for movement from an inactive forward position to an active rearward position and vice versa, a series of column stop levers mounted centrally onthe main frame in rear of the column stops for cooperation with such stops as are moved to active positions, a series of decimal key levers forming part of the keyboard, a tabulator key forming part of the keyboard, operating connections between the respective decimal key levers and the stop levers and between the tabulator key and the one only of the stop levers whereby the decimal key lever associated with the one stop lever and the tabulator key may be independently operated for actuating said one stop lever, and
  • a tabulating mechanism fortypewriting machines the combination with a main frame, of a carriage mounted thereon, a series of column stops mounted on the carriage and spaced apart at letter space intervals, a series of column stop levers mounted on the main frame for cooperation with said column stops, a series of decimal key levers, a tabulator key, operating connections between the respective decimal key levers and the stop levers and between the tabulator key and one only of the stop levers whereby the decimal key lever associated with the one stop lever and the tabulator key may be independently operated for actuating said one stop lever, and manually operable means for successivelyrestoring the actively positioned column stops to inactive positions upon movement of the carriage.

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Input From Keyboards Or The Like (AREA)
US581702A 1931-12-17 1931-12-17 Typewriting machine Expired - Lifetime US1892071A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US581702A US1892071A (en) 1931-12-17 1931-12-17 Typewriting machine
GB324/32A GB386787A (en) 1931-12-17 1932-01-05 Improvements in tabulating mechanism for typewriting machines
DER83973D DE642964C (de) 1931-12-17 1932-01-31 Tabellenschreibvorrichtung fuer Schreibmaschinen
US634968A US1926165A (en) 1931-12-17 1932-09-26 Typewriting machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US581702A US1892071A (en) 1931-12-17 1931-12-17 Typewriting machine

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US1892071A true US1892071A (en) 1932-12-27

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Application Number Title Priority Date Filing Date
US581702A Expired - Lifetime US1892071A (en) 1931-12-17 1931-12-17 Typewriting machine

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US (1) US1892071A (de)
DE (1) DE642964C (de)
GB (1) GB386787A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746591A (en) * 1952-04-30 1956-05-22 Royal Mcbee Corp Tabulating mechanism for typewriter or like machines
US3871508A (en) * 1973-03-21 1975-03-18 Facit Halda Aktiebolag Tabular device for an office machine
US3978967A (en) * 1973-09-17 1976-09-07 Hermes Precisa International S.A. Typewriter tabulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746591A (en) * 1952-04-30 1956-05-22 Royal Mcbee Corp Tabulating mechanism for typewriter or like machines
US3871508A (en) * 1973-03-21 1975-03-18 Facit Halda Aktiebolag Tabular device for an office machine
US3978967A (en) * 1973-09-17 1976-09-07 Hermes Precisa International S.A. Typewriter tabulator

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Publication number Publication date
DE642964C (de) 1937-03-22
GB386787A (en) 1933-01-26

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