US1820329A - Typewriter - Google Patents

Description

g- R. SEIDELINGER 1,820,329-

TYPEWRITER- v Filed Oct. 28, 1926 7 Sheets-Sheet F G. I.

JNV EN TOR:

ATTORNEYS.

Aug; 25, 1931. R. SEIDELINGER TYPEWRITER Filed Oct. 28, 1926 7 Sheets-Sheet 3 uiger,

WITNESSES g- 25, 1931- R. SEIDELINGER v 1,820,329

TYPEWRITER I Filed Oct. 28, 1 25 7 Sheets-Sheet 4 INVENTOR: fiabz'eSez'aeiingcz;

By P ATTORNEYS.

Al lg- 2 1 I R. SEIDELINGERY 1,820,329

TYPEWR I TER Filed Oct. 28, 1926 '7 Sheets-Sheet 5 INVENTORQ Fobz'eS/eziifw;

ATTORNEYS.

I Patented Aug. 25, 1931 h f v I j j. I

! =UNITED. "STATES PATENT.OF'FICE;

RQBIE sE nELiNerEn, or rHI AnE rfiIA, rmiliisynviiivm' I I wrirrnwa rnnh v I i it c A pplicatien j fi1ed0ctoberi2$,' 192e.' stream. i44,ess. This invention relates to typewriters, for abouta com and more particularly to ,escapement mechamon fulcrum axis 16ffixed in a mounting bar I nism therefor; the primary object being to 17 that extends longitudinally between opp'revent' skipping of i the platen carriage; iposite side rails of the rectangular machine while another object istolprovide simple and ame18.- Such imovementoffthe type'keys, V

reliable. means whereby the foregoing de- :"isyieldingly opposed byQindivi-duall'yo ing my invention,

siderata' may be conveniently secured. associated spr ngs 19 that engage 'within In the drawings herewith FigLI is a plan socket aperturesj20 in themountingbar 17 Y view of a typewriter fconveniently embody- Land tendfjto normally maintainsaidkeys; in r f 5 QIPQS iOII ,Q fFig. III; against a flexible a I Fig. II is anend elevati'onof the machine, stop. plate 21 secured" along-thebottom ofa as viewed from the left of Fig'. I,with .cer secondlongitudinal bar 22, of theflmachine i J tain portions broken away to expose interior .frar'nerl8, disposed somewhat tothe .forefof details. V i 1 J ,1. the-barlTpreviOusly mentioned.) Ihe'type f Fig. III is a par cross section of the on bars, indicated at 23 in Fig. X, are arranged 5 ganization taken as indicated by the arrows was aconcaved series around and beneath V III-III in Fig. I. v V. f thefcurved edge ofa-sector plate 24 secured Fig. IV is a local sectiontaken as desig-' centrally of a bridge' piece 25 spanningthe natedby the arrows IV -IV in FigIII. side railsof the machine frame at about the i Fig. V is a fragmentary cross section, middle. This sector jplat e 24 is slotted 7 taken as indicated by the arrows V.V, in radially as showninFig. XI, to receive and Fig. I, through the platencarriage and ce'rguide the inner ends of the .type bars 23 tain parts associated with the escapement -which' arepivoted for. swinging movement mechanism for said carriage.v Y on a narcuate rod 26 secured at theback'of Y 25 Fig. VI isa localsection viewjtaken as I saidplate; Swlnglngimovementis imparted 7 aindicated by the arrows VI-VI in Fig. V. to the type bars23 by the letter keys 15 I Fig. VII is a perspective view of one of through the medium of intermediary bellthe parts shown in Fig. VI. V crank levers 27 having pivotal support on Fig. VIII is a skeletonized cross section of the bar 22, seeFig. X. V The radial arrange- 3b, the machine showing the means governing ment of the type bars'23 determines striking back spacing of the platen carriage. of. the type thereon at a single common point Fig. IX is a section taken locally as indi' before 1 the platen roll 28 where a' clevised cated by the-arrows IX-IX in Fig. VIII. guide .29 is stationed, to stabilizethebars Fig. X is a part cross section of the 'ma against sidewise'vibration at the instant of 5 chine showingthe actionofthe' type levers. striking, said guide. being secured centrally 5 Fig. XI is afront view of the sectorplate ofthe sector plate '24, as shown in Figs; I on which the type levers are fulcrume'd,fas andXI. "At-the front, the sector plate24 viewed in the direction of the arrows XL- has a concentric arcuate ridge 30 which XI on Fig. X. 1 I serves asananv-il-to suddenly intercept the a 46) Fig. XII is a'frontview of the vertically movement of the type bars 23 so that under 0 I movable section of the platen carriage. the force ofthe blow, the free type carry- 7 v Fig. XIII is a perspectiveview of one end ing end of said-bars s caused to flex forward of the platen carriage showing the means for momentarilythereby predetermining an in intermittently rotating the platenrollyand, stantaneous snap lmpression upon the sheet Figs. XIV, Sheetl, and XV, Sheet 2,'are on the platen. -roll28,'followed by quick with- 95 detail sectional views taken'as respectively drawalof the type. This action is indicated indicated by the arrows XIV XIV and in dotted lines :in Fig. X, and,- as will be 5 r XV-XV- in Fig. XII. readily understood,effectively prevents'blurr In these illustrations the typekeys '15 are ring of-the typed impressions 50 shown as pivoted at their rear ends-Fig. ,Theink ribbon R travels between winding 10:;

spools 31, 32 concealed in opposite ends of an enclosure 33 with retractable cover wings 34, 35, see Figs. I and II. In following the course of the ribbon B it will be seen that the same passes upwardly from the spool 31 through a slot 36 in the wing 34 to an angular guide 37 whereby it is redirected for passage across the front of the machineedges up and down-before the platen roll 28. At the other side of the machine a second angular guide 38functions to re-direct the ribbon R so as to pass downwardly through an opening 39 in the cover wing enroute to the spool 32. Appropriate mech:

anism, only partly shown in Fig. II, is pro vided for intermittently rotatin the spools 31, 32 automatically in order to feed the ribbon R step wise concurrently with progres sion of the platen carriage. This mecha-.

nism forms the subject matter of a co-pending application Serial Number 144,689, filed concurrently herewith, and need not therefore be further referred to herein.

To move the ribbon R up and down relative to the type striking point concurrently with the actuation of the type bars 23, I employ a vertically reciprocating carrier 40 havingat opposite sides of an exposure interval, cheek pieces'40a Figs. I and XI with suitable transverse guide slots for traverse of the ribbon B. This carrier 40 is supported in a vertical slide bearing jointly provided by the sector plate 24 and the bridging bar 25, and at its lower end is coupled, by means of an angled link 41, with the one or bent arm of a bell-crank 42 fast on a shaft 43 journalled in upstanding bearings of the machine frame, see Fig. X. The other or straight arm of this bell-crank 42 is, in turn, coordinated b a link 44 with an arm 45 fast on a shaft 46 having journal bearing independing lugs of a plate 47 which is sustained, by means of posts 48 at an elevation from a supporting bracket 49 extending forwardly from the rear rail of the machine frame 18. At opposite ends, the shaft 46 has arms 50 that are joined by a cross rod 51 having pivotal connection with rearward extensions 52 of a horizontal reciprocating member 53 which has a tongue 54at its forward end engaging a guide slot in the sector plate 24, see Fig. XI. To the reciprocatory member 53 is secured a segmental tappet bar 55 which is concentric with the sector plate 24, and lies within the ath of the type bars 23 so as to be struck y them to effect elevation of the ribbon R into position before the type reaches the platen roll 28. A coiled spring 56, in tension between the sector plate 24 and the cross rod 51, serves to normally hold the ribbon carrier 40 in the lowered position with previously typed impressions exposed to view as is common in so-called visible type- Writers. In the position shown in Fig. X,

only the upper margin of the ribbon It is exposed at the type striking point, but the throw of the carrier 40 may be increased so that the lower margin of the said ribbon may be presented when desired by means partly shown in Fig. X, such means including a forked lever 57 that engages the link 44, beyond the pivotal connection of the latter with the arm 45. The forked lever 57 is fast on a shaft 58 journalled in suitable bearings on the bracket 49, said shaft also carrying a notched disc 59 that cooperates with a spring detent 60 to normally hold the forked lever 57 in shifted positions. Thus, when the forked lever 57 is swung upward, it will be seen that the link 44 will be elevated along the straight arm of the bell-crank 42 with resultant impartation of greater throw to the carrier 40 than before. Manipulating means are provided for actuating the shaft 58 from the front of the machine, such means including a shaft 61, Fig. II with a finger knob 62 at its outer end, said shaft being rotatably' supported bythe frontal plate of the machine, as well as by the bridging piece 25. At its inner end the shaft 61 has an arm 64 which is coupled by an interposed link 65 to an arm 66 at the contiguous end of the shaft 58 aforementioned. Accordingly, when a change in the throw of the ribbon carrier 40 is desired, this may be determined 7 simply by rotating the finger knob 62 in one direction or the other.

The carriage for the platen roll 28, generally indicated by the numeral 67 Figs. I and V, is shiftable longitudinally of the machine and comprises an underframe with upright end members 68, 69 connected tegether by transverse bars 7 O, supplemental tie rods 71, 72 being also employed at other regions to lend further rigidity to the structure, see Figs. I, II, V. The underframe aforesaid is supported in an antifriction slide bearing with balls 73 engaged in raceways jointly provided by the bars 70 and fixed flanking parallel bars 74 sustained by supports 75 that extend rearward from the bridging piece 25. A retainer comprising transversely joined perforated strips 76 serves to maintain the balls 73 definitely spaced. That section of tie carriage 67 which. directly supports the platen roll 28 is shiftable vertically relative to the under frame to position said platen roll. 28 to take impressions either from the small or capital letter type T, T Fig. K on the type bars The carriage section just referred to is constructed along lines generally similar to those of the under frame, i. e., it embodies end plates 77 which are tied together a number of cross rods or tie rods 78, 79, 80, 81 and 82, see Figs. I, II, V and XIII. The office of guiding the platen roll carriage section for vertical shi "ting is relegated to antifriction bearings whereof the balls 83 roll between opposed" tively secured on the parts 68', 69and 77' see Fig. 1;

typewriter. These shift keys 85, ;86 are coupled, with capacity for independent actuation, to the ends of arms'88 by means 0 -two-part links 87. The arms 88- are fuli cruined at89 t0 the rearof the brid e piece and are united by a cylindri'c rod 90eX- tending"longitudinally of, the machine.

This'rod 90 serves asa'track for a roller 91 journalledcentrally of the tie bar 81 that connects theend plates .77 of thevertically shi'ftable carriage section. Thug-whenever one or the other of theshiftkeys-85f80 is depressed; the platen roll" supporting section y will be lifted, for the purpose, indicated; re;

gardless of the position occupied by-,tlief platen carriage 6i.

Now 1t will beobservedfroIIl" g I XII andXIII that the protruding extremities 0L. the shaft 2800f the'platen roll 28 are journaled in the ends off'forwardly projecting arms 92 integrallyfformed with the "endfplates '77 of the vertically removable carriage section. ,As

best shown in 'Figs. I, Vithese'arms 92 are bowed upward and outward towardtheir terminals with con-- sequent provision of" retaining loops L access ble from opposite ends of the V to takeroll paper P conventionally indi rated in dot-ahd-dash linesin Fig. V. Intermeuiatethe retaining loops L,, a guide glate93funct1ons to dlrect the paper P between theplaten' roll 28 and auxiliary rollers 9 1, 95 that cooperate with it, said rollers I being-respectively sup portedat the ends by arms 96, 97 Figs. II'and V fulcrumed for in-,

dependent movement on a cross rod 98. Tension springs 99 drawing upon depending lugs of the arms 96', 97 act to maintain'the roller95 in contact with the platenroller 28; while the roller 941is yieldingly urged upwarchby compression springs 100 influential upon depending extremlties 10 1 of the arms 96.. The extremities 101 just referred to are slotted to take a cross rod 102 which projects beyond the left-hand end of the nlaten carriage 67; 'see Fig. I, where it is equipped with a manipulating member 103- whose configuration corresponds susbstan tially to the curvatureof the adj acent arm 92 so as to leave the paper roll retaining loop L at that end of the machine wholly unobstructed. After leaving the auxiliary roller 95, thepaper P is directed upwardly and rearwardly about the platen roll-28 by flexible guide tongues 104 secured to the cross bar or tie rod 82, and-is supported by an inclined plate 105. ,Along its upper ed e this plate 105 vhas pivotal connection with a tie rod 106 that joins rearwardly reaching supportingbracket arms 107 suit-' ably {secured to, the vertically shiftable sece raceway s s l, 84 respec' and its movement is controlled by. 7 shift keys '85, 86"at opposite ends ofthe parts beneath. I

Rotary shiftings of the platen'roll 28. are

. by a flexible carriage I tion of the platen carriage ,67. Byfvirtuethe supporting plate 105 of its pivoting access must be had to may be lifted when effected :through the J medium of a finger f lever 108 whereof the shaft 109 is fulcrumed in a bearing 110 secured on a lateral horizontal projection 111 of the arm 92, see

,Figs. XII and XIII. The shaft 109 protrudesbeyond the" bearing 110 at the inside to afford attachment for a lever .112 and to accommodate a surrounding torsion spring 113 operative in anti-clockwise direction, with respect to Fig XIII tono-rmally maintain' the fingerlever 108 in the illustrated w position with a stop screw 11 1 thereoncontacting'with the horizontal projection'111 aforesaidofi'the arm 92. Bymeans' offa' link115, the. lever 112 is coupled with one armof a bell-crank 116 which isfree-on the 119 acting upon its tail; into engagement with the teeth ofca ratchetyieldingly, opposedby a small .roller. 121

urged :between. the teeth of theratehet supporting arm 122 fixed to the horizontal projection 111.

05v Single, double 7 and triple spacing isfcontrollable, by a shiftable stop .128 with steps 123ato cooperate, with the lever 112 see Figs. I, XII, XIII I and XV. It is to be particularly V-rema'rked' that the ratchet wheel 120 and its pawl platen'roll 28, and that the, associated actuating parts lie Wholly within the circumference of said roll so thatthe paper P of the latter. Thelopposite end of the platen roll 28, it will also be noted is likewise entirely free "of obstruction. Accordingly,

machine. 7

As'shown m FighV, the end members 68,

"paper of anywidth may be. used 7 in the 69 of the under frame of thefcarriage .67 have'rearwardly and upwardly-projecting arms 12 1'with a pair'of spaced parallel 118 occupy the hollowat the end of the 105 may projectbeyond the corresponding end. p

notched along its lower edge for conveni,

ence in settingniarginal stops 127'in adusted positions along its length. These.

marginal stops 127 engage atappet 128, supported for rocking movement by a bracket. 129, see Figs. I andIII, in operating a caution signal not shown'to .apprise the operative of approach to the end of-a typed line after usual practice in this art. Ex

tending longitudinally of the machine at therear of the under frameof the platen carriage 67 isa bar 130 of angular cross section with arms131 extending forwardly n5 cross bars ;.126 rigidly supported bea vtweenthem'i 'pf these bars 1251i$ for pivotal connection on the rod 72 to the outside of the end members 68, 69, see Figs. II and V. To the bar is secured a toothed rack 133 which is normally in meshing engagement with a gear pinion 134 associated with the escapement mechanism to be presently described. The illustrated position of the angle bar 130Figs. II and V- is determined by stop pins 135 on the members 68, 69 against which the curved free ends 132 of the arms 131 are urged. by a leaf spring 136 effective upon said bar. At the right hand end of the machine, the angle bar 130 has :ured to it an actuating finger lever 137 through manipulation of which the rack 133 may be temporarily disengaged from the pinion 134 to permit shifting of the platen carriage 67 apart from control of the escapement mecl'ianism. The finger lever 137 is curved to conform with the contiguous roll retaining loop L for a reason analogous to that described relative to the finger lever 103.

The platen roll carriage 67 is subject to the influence of a spring motor 140. of a conventional type located at the rear left hand corner of the machine frame. The spring barrel of this motor 140 is formed with a winding drum 141 to take in the tape 142, whereof the other end is hooked to the carriage 67. Draft of the carriage 67 toward the left by the just described means is under governance of the escapement mecha nism, which-as show. n igs. I, IV and V-comprises a ratchet wheel 143 wherewith are associated a pair of stop detents 144, 145. The first mentioneiil 144 of these detents acts as a full stop and the other 145 as a half stop incidental to each incremental movement of the ratchet 143 in determining the spacing of the typed impressions upon the paper P on the platen roll 28. The detents 144, 145 are mounted on a slide plate 146Fig. VII-that is reciprocatable horiaontally against the pull of a tension spring 147Fig. VIunder guidance of bearings with bails 148 engaging opposing raceways 149, 150 respectively secured to said plate and a member 151 forming part of the superstructure supported by the bracket 49. In each instance but two balls 148 are employed, these being held in proper spaced relation by perforated retainer strips 152, see Fig. VI. The escapement means is actuated concurrently with the operation of the letter or type keys 15 by mechanism which includes a longitudinally-extend'ng universal bar 153 that underlies said letter or type keys, and is supported from the ends of arms 154, with pivots on a fixed cross shaft 155. By means of an adjustable link 156, one of the arms 154 is coupled. with a bellcrank lever 157 fulcrumed at 138 to the part 151, see Fig. IV. The upright arm of this bell crank lever 157 is notched or toothed at 139Figs. IV and VI-to enable adjustment of its connection with the free end of a flexible strip 158 attached to the slide plate 146. 'Therefore when a letter key 15 is depressed, its motion is transmitted through the universal bar 153 and the coordinated elements just described, to the slide plate 146 with the result that the latter is drawn to the leftFig. IVto retract the detent 144 and, at the same time, to bring the companion detent 145 into action. The ratchet 143 is consequently permitted to rotate through a half step. With the return movement of the slide plate 146 to the right, the detent 144 is restored to activity concurrently with withdrawal of the detent 145, thereby to permit completion of incremental movement of the platen carriage 67 under pull of the spring motor 140. This arrangement, it will be seen, acts as a positive check on the platen carriage 67 so that skipping is absolutely prevented. Shifting of the platen carriage 67 is also subject to control by the spacing bar or key 160 whose rearwardly-extending arms 161 have pivotal connection by hinge leaf means 159 with the machine frame 18see Figs. I and III-at 162. The movement of the spacing bar 160 is communicated, by means of links 163, to bell-crank levers 164 fulcrumed to bearings 165 depending from the mounting bar 17 hereinbefore referred to, the forked extremities 164a of the bell cranks 164 cooperating with the heads of studs 166 extending downwardly from the universal bar 153. Thus, by depression of the spacing bar 160 in opposition to a spring 167 in tension between a fixed anchorage 168 on the machine frame and the bell crank lever 164, it will be seen that movement is imparted to the universal bar 153 with incidental actuation of the escapement precisely as before. Shifting of the platen carriage 67, to the right, does not effect the escapement since at such times the detents 143a, 1435 Fig. IV on the ratchet wheel 143 ride idly over the teeth of the pinion 134.

The means which I provide to enable back spacing comprises a toothed wheel 169 that is secured on a shaft 170 and meshes with a rack 171, on the back of the platen carriage 67. The toothed wheel 169 is adapted to be picked by a pawl 172Figs. VIII and IX whereof the lower end is slotted so as to engage a stud 173 projecting laterally from an upstanding post 174 secured to the rear wall or rail of the machine frame 18. Near the upper end, the pawl 172 carries a pin 175 that projects into an open ended vertical slot 176 at the top of the post 174, said slot being somewhat wider than the diameter of the pin. As a consequence of this construc tion, the pawl 172 is accorded capacity for vertical movementas well as limited rocking movementabout the stud 173 by virtue on the stud 173 has a lateral pin 179engaging a downwardly inclined transverse slot 180 in the body of'thepawl 172." A tension spring 181 active upon the lever 178 is influential in holding the pawl 172retracted, as shown in the illustration last referred to.

The outer end of the-angled lever 178 is,

coupled by. a link. 182-with the rearextremity of the back spacing key 183 which, as 'illustrated in Fig. VIII, is fulcrumed on a fixed center 184 and so located that it does 'not" have any effect upon the'universal bar153.

The action of the backspacing means is as follows motion derived as a result of depression. of the spacing key 188 is transmitted by the link 182 to the. angledlever' 178. Incidental to themovement of the latter, coaction as between the stud 179 and the slot 180 will first determine swinging of the pawl 172 to the right aboutthe stud 178 as permitted by the clearance between the pin 175 and the guide slot 17 6into.engagement with the toothed wheel 169. Continued movement of the lever 178 is attended by elevation of the pawl 172 to impart clockwise rotation to the toothed wheel 169. with consequent shifting of the platen carriage 67 to the right, thestop detent 144; yielding tobeing moved about, itsvpivot by the teeth of the escapement ratchet 143 in opposition to a spring 144a. j

The tabulating .mechanism with which this invention is in part concerned is con-: trolled by a special key 185 that is pivoted on the same axis v16 with the letter or type keys 1'51 and located at the extreme right of the upper key row, as shown in Fig. I, beyond the corresponding end of the universal bar 153. In order to distinguish it from the others,I have shown the tabulator key 185 in dotted outline in Fig.

III. Through a connecting link 186, movement of thekey 185 is communicated to a bell-crank 187 pivotally supported by a fixed I shaft 191 has a link connection 193 withv the full stop detent 144: that cooperateswithf the escapement ratchetla3, see Fig. IV.

bracket 188 an'd,in turn, coordinatedlby a link 189, withan arm 190 fast on a longitudinal shaft1191, A jsecond'arm 192 on the Consequently, when the tabulator keyf185 is depressed, the stop'detent 144; is retracted,

thereby releasing the platen carriage 67 to the spring motor 140 for draft toward the left. In order to enable checking such move-'7 ment of the platen carriage 67 in determinlating, I equip the machine with means as follows: Fast onthe axis 170, to therear of the toothed wheel 169 "is a rotor disk 19 1 capem ent control.

are I characterized by spring. tongues 197 with curled terminals, see Fig; 17. These spring tongu es ;197 cooperate with spacedfconcem tricgrooves 1 98 in one side face otthe'disk" I '194 to hold the stop lugs 196 either in trafcted idle, -or; extended active positions as shown in Fig. IV. IA" shaft 199 journalled in bearings 200Fig."IIupstanding from with circumferential notches .195 for radial.

guidance of straddling stop lugs 196 which the rear wall .or ra il of-the machine frame 18, is 'adapted "to be rocked-clockwise with I ingly it is provided with anarm 201 that is coupled by a connecting .rod #202..with the 'reference'to Fig. III, concurrently with de-.j 1

pression of'the'tabulator key 1855. Accord; '6 y link-1891 Incidental to rocking of theshaft 7 199' as -just explained, a stop finger 203 thereon is swung: into positionbeneath the 5 disk 194 so asto intercepta ny of the projected check or stop .lugs 196. Therefore, by

choice as between the stop lugs 19.6,:the rej turn movement of the platen carriage 67; i i

may be arrested at any point withinthe lino its of its traverse for the purpose of tabulation, simply by depressing the tabulator key lJ-Setting of the stop lugs 196 is facilitated by an annular numbered scale 205 fast to the rotor disk 194 by a cotter "pin 204.- I

Fig. V, which isgraduated to correspond with the circumferentialnotc'hes of the latter, as well as with the incremental stop positionsof the platen carriage 67.

Having thus described my invention, I; l 1

Y IQQ.

claim 1. Ina typewriter embodying a-platen carriage, and escapement mechanism therefor including an escapement wheel,'a slide'plate I under guidance of ball bearings horizontally reciprocative in opposition to spring tension, individual full and half stop detents car ried by said plate for alternate active en- "gagement at opposite points of-the'escapement wheel, a'universal' bar with an operabell-crank having a flexible connection to such slide plate, said'bar being actuable'by the platen carriage, and a special key with,

operative connection to the full stop detent V I whereby the latter may be 'independently'retracted to free the platen carriage iron es 2. In a typewriter embodyinga platen carriage, and e'scapement mechanism therefor. including an escapement wheel, a slide plate underlguidance of ballbearings horiing the starting point-of a new line in'tabu- Qzontally reciprocativein oppositionto spring gagement at opposite points of the escapetive connection to'the slide plate including 1 an adjustable link co-active with a notched;

ment Wheel, a universal bar with an opera tive connection to the slide plate including an adjustable link co-active with a notched bell-crank having a flexible connection to i such slide late, said bar being actuable by the letter lieys of the typewriter to effect simultaneous horizontal movement of the slide plate in determining a twostage sliog incidental to each progressive movement of the platen carriage, and a special tabulator key co-ordinated by a linkage with interposed bell. cranks to the full stop detent whereby the latter may be independently retracted to free the platen carriage from escapement control.

' In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 25th da of October, 1926 R0 IE SEIDELINGER.

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