US2278978A - Translating mechanism - Google Patents

Description

April 7; 1942. c. R. DOTY TRANSLATING MECHANISM Filed Aug. 25, 1959 3 Shets-Sheet 1 April 7, 1942.

c. R. DbTY TRANLATING MECHANISM Filed Aug. 25, 1959 5 Sheets-Sheet 2 FIG 2.

ATTORNEY April 7, 1942. c. R. DOTY 2,278,978

TRANSLATINQ MECHANISM Filed Aug. 25, 19:59 '3 Sheets- Sheet s FIG. .5.

v i/l/I/l/I/ l M u M n i- ATTORNEY Patented Apr. 7, 1942 new Uni si 'ter national Business 'Macliines Corporation, New York, N. Y.', a corporation f,New York Application August 25, 1939, Serial No.' 291,912

6 Claims, (01. 178-27) i Fig. l is a cross section of the typewriter show- This invention relates to translating'mechanisms of a type commonly used in communication systems and, more particularly, to power operated typewriters adapted for remote control. i gv Fig. 2 is a plan view of the magnets of the 1 It is the general object of the instant inven translating unit. I V tion to provide an improved power'operated typef Fig. 3 is an end view of the clutch mecha writer of simple and novel construction andesnism. i I i pecially suitable for control by coded impulses Fig. 4 is an enlarged plan cross section detail sent from a distantly located transmitting staview 'of the clutch mechanifsntil.1 t t v v m Fig. 5- is a de ailview o e mo or con ac s Among t more ific objects are speed of and the devices for operating the same. 5 v operation, accessibility of parts for service; flexi- F g- 6 s a de il v wt e locking mechanism billty of structure for varied code uses, and an for holding'thefpermlltfltbn a Operated r a improved power reamer'for providing the actu- 15 predetermined t ating force to effect printing of characters rep' fo Considering the preferred embodiment resentat-ive of the received impulses in accord- 0f n ent on pcr Se atsl shizwn inihe'drlawiglgs, ance ith preselected c a brief escription of '16 ypewri er s ruc ure It is proposgd to provide a, unit construction 210118 willbe given so thatlater, when the trans-i mountable conveniently under the well known lating c l'ol unit is described, a better under-' electromatic typewriter in such a manner that Standing y be had in regard 17011116 Cooperation it causes the base of said typewriter to be raised bfitwe'en Said CQIItTOT-Imit a e yp only a very small increment above its normal pov 1 sit-ion. The structure is thus very compact andv 9 m f is suited for use on any ordinary desk or table mustmtlgve; m thls mvenilone is without provisions for special mountings. By shown a ejmbodymga t known y a l f simply loosening two holding screws, the 'entire cgrdmg p. at t transmltpmg Statlon"wh1ch" lower unit may be swung down out of contact may. be m constructmn the 1 m with the typewriter mechanism so as to provide i typewnter h desclfibed m tie-tall accessibility for inspection and service as well f t -g 3 512 a i i v y as to permit a quick addition of this type pf con-, 0 g escnp i r01 unit to the Ordinary typewriter. i I F te erring o t e-d-aw1ngs and particularly to i g 1 1g, 1, well known means 'are provided for actut fol the t1 anslatm'g mechamsm ltself p1 ating the type bars [6, comprising a constantly of the typewriter key levers so that a-downward md'lvldualipower umts each compnsmg a cam movement imparted to an of the seeker levers the engagement 9f the Cams with'the rollerbeing' suflicient p s g of its related yp controlled selectively by the-character key bars vi 7 11. The operating means for key bars ll will be writer ,key vto effect printing. A plurality of 40 described later. a 1 j i permgtaition bars are positioned in accordance Any suitable means may be provided to rotate the'energizaffior} of plurality of control the power roller, in the direction indicated" by filagnetstuponfriieptlobn of gotded impu fi ra i the arrow; which is adapted to cooperate with 6 P0511011 Q 939 ars e ermines W h 0 two rows of cam units arran e in h fr the seeker levers is to be rendered effective for year 70f t roller; jlfhe. camgl i g, ge $221223 7 op a i n y p w r dr v n r er r cam shaft to be pivoted on one arm' of a bell crank lever. a g m of characters represented by :2 which is pivoted in the frame of the record- 6 60 e lmpll l ingunit,- as indicated enerall b reference Other objects of the invention will be pointed vcharacter [3, the other aria of the sai' c l bell crank out in the following description andclaims and lever is operatively connected with an arm of illustrated in the accompanying drawings, which, bell crank lever M by means of link I5. Another disclose, by way of example, the pr nciple of the: arm of the said lever Hi is connected tothe type invention and the best mode, which has been i bars l6-1n a well known manner, so as to effect cortiteirlilplaged, of applying that pr nciple. operation of the type bars or; any other suitable n -e rawmgs: I 1

ing the relationship of the'various units.

Fig. la is a modified view of thels'eeker lever and camshaft arrangement shown in Fig} 1.

means connected to the bell crank levers upon ciatedztherewith.

selective operation of'the controlling key bars l1. I n

The pivoted bell crank lever 12 is operated by the associated cam it whenever the latter engages the driven rollers; the engagement of the cam with the roller'is controlled by means of the associated control key bar I! in a manner which will now be briefly described.

lug 22 on the stop lever 23."If,however, the

corresponding key bar is operated, the bifurcated lower end of extension arm 24 associated with one of the said key bars I! engages an arm 25 at the upper end of thestop lever 23 'whichis providedrwith. an offset projection at its end which extends laterallythrough an opening in thebell crank lever H. The arm of the stop lever 23 is then swungrearwardly or to the left 25 as viewed in Figj'l about .the pivot 26and its lower end forwardly orto the right as viewed in this figure, thus releasing the cam,-which.then turns under the influence of' the spring-urged impeller-arm l8. In doing so the upper serrated 30 lobe of the cam is brought'into engagementwith the powerroller, which turns in a counterclockwisedirection and therefore causes a continued rolling movement of the cam until the high point has been reached and passed; This causes the whole cam unit to swing around the pivot l3-so as to pull-down the corresponding link and actuate oneof the type bars 'or any other. mechanismwith which the cam unit may be connected;

- After the high point of the cam is passed, the 40 earn loses contact with the roller, but the said.

impeller-arm 18 tends to continuetherotation thereof by engaging the second impeller-lug 29 'of cam ll until the second detent 21 engagesone ofthe stop' lugs. Since the half rotation of the from'typewriter cams ll move-in an opposite dicam consumesonly a small fraction of a second, it' isldiflicult torelease the key, bar 'within' this short interval, so that it is'the lower lug 28 which-is first engaged, but upon the release of;

' the key bar and the return of the stop'lever 23 .to normal position, .this 1ug28 disengages the detent, whereupon the impeller-arm rotates the cam-slightly, and the said detent then engages the upper stop lug 22. v

lzItis obvious then that depression of akey bar releases the revolublymounted cam to "engag'e and be actuatedby the power roller in turn operating the associated bellcrank lever and its attached links to cause the associated mechanism such as the type bars and other operating'me'ch-- 6d anisms to beoperated. It is to be'understood that an individual cam unit is provided" for eachtype bar or other functional. mechanisms asso- The action of the cam mechanism has been described .withrespect to one of the rear bank offcamrunits; in the casev of those of the forward bankthe operationxis analogous but the directions,.ofmovement, and the order of operatiorrofthe stop lugs isreversed. For example,

if the bifurcated'arm 24a is positioned to engage;

thearm25a at the upper end of stop lever 23d by. virtue of operation of the associated key bar,

the said arm is-positioned rearwardly or to the left as yiewedin Fig. 1, and the lower endof the roller l0.

stop lever 23a is moved forwardly, that is, to the right'as viewed in the said figure. This said operation is effective to release the cam, by virtue of positioning the lower stop lug 28a out of the path of detent Zia, thus permitting the spring-urged impel1er-arm18a to rotate the cam slightly in a clockwise direction to effect engagement of the lower lobe of cam II and power Upon completion of a half revolution of the "cam II, the second detent 21a engages first the upper stop lug 22a while the stop lever 23a-is in an operated position, but upon release of. the associated key bar and the return of the said stop lever to normal position, this lug 22a disengages the said detent and the impeller-arm rotates the cam slightly so that the said detent then engages the lower stop lug 2811, as shown inithe figure. In this manner the bell crank lever l2a. is rotated about the pivot Bar to operate the associated type bar or any other mechanism associated therewith.

. It is apparent from Fig. 1 that the movement of the above described cam'unit may be utilized to operate any conveniently arranged type of transmitting mechanism such as that generally designated T. It will be. noted that each operation of. a typewriter cam causes its related lever L,of the mechanism T vtobe operated so as to combinationally position permutation bars P for operation of their individual contacts 5| for transmitting simultaneous coded impulses accordingto which of the typewriter key bars B have been depressed. As-shown in Fig. 2, the

bars P are provided with projections 52 having bevel portions .52a. These projectionsv 52 appearon both edges of the bars P so that upon engagement of lever L withlthe beveled surfaces 52a, movement of the bars P to the right is effected to close contacts 5|. The engaging surfaces of levers L are also beveled to thesame angle to provide a large contact surface so as to reduce wear at this point to a minimum. The provision of projections 52on both edges of the permutation barsis necessary in view of the fact that the operating levers L which are operated rection from those operated from typewriter eams-Ha.

Translating control unit erating. connection between'the key bars and a plurality of seeker levers 32 of the translating control unit. Thereare as many seeker levers as there are typewriter key bars and eachlis pivoted on a rod 33 which is held in place by seeker lever pivot support 34. The seeker levers are all biasedinacounterclockwise direction about their pivots-by springs 35.

A zoning reamer or cam shaft 36*ls journaled in the frame F and is driven through a clutch generally designated C (Figs. .2, 4) by means of' gearing31, 38, 39 from the power roll I0. Step gearing is used so that any desired cam shaft speed may be obtained by simply changing the gear ratio.

Code bars 40 (Fig. 1) provide for selecting the proper seeker'levers 32 for operation by the cam shaft 36. Five or six of thesebars are sumcient to take care of all transmission requirements. These bars are more commonly called permutation bars and will be referred to as :such'i'n the alternativeffrom time 'to'time. The relative p'o- -sitions of the permutation bars and, more par- '--ticularly, the positions of the notches on these bars determine the selection of one seeker lever and the rejection of the remainder. To ke'ep the seeker levers properly aligned in relation to the notches in the code bars a guide comb '41 isused.

A group of control magnets "42' a're mounted on the angle piece 43. One of these mag-r'ie'ts is effective upon energization to operate the clutch ,C, and the remainder are used to position the permutation bars. Six c'ode bars are shown in the present embodiment and a control magnet 42 is provided for each of them. Energizati'on 'tof amagnet 42 by an impulse sent thereto causes armature '44 to be attracted and impart the required movement to the permutation barw'i'th which it hasm'echanical connection at E5. "The magnitude of movement of a permutation-bar when operated by its magnet is approximately .093" *under preferred operating conditions The translating control unit side frames 46 are 'mounte'd'under the front feet '41 *(Fig. 3) of the typewriter and the net resulti's the raising of typewriter only i s abovenor'mal, allowing the complete unit to be placed as easilyas "the typewriter alone, without the necessity of specially constructed desks or stands. The unit pivots'near the back of the typewriter on a rod t8 (Figs. 1, 2). The ends of the seeker lever'sup "port 3% are slotted and held in place by means of four screws '49. To attach the unit to the typewriter the screws are merely loosened and the support is slid to the left (see Fig. 2) as far as possible which allows the seeker levers 32 to come lbetween'th'e key bar studs 3l and' the adjacent key bars 11. After the' typewriter mountingfeet are in iplace the support is then slid to the right so asto position the seeker levers over studs 3'! on the key levers, each of the seeker'levers beingform'ed with an eye portion at the top thereof which fits conveniently over these studs. Screws 49' are then tightend to secure it in place. I 7

Assuming a combination of impulses representing a character is sent to energize magnets "4-2 simultaneously in accordance with some preselected code, the operation'would be as follows: Selective energization of magnets Why the incoming impulses causes positioning of their related permutation bars in such a manner as to allow one of the seeker levers 32 to drop into operating engagement with the contour of the cam shaft 36. The movement of any permutation bars through the medium of the bail 61 is directed to close a pair of contacts 50 causing the energization of the particular one of magnets 42 which controls the operation of clutch C. Thus, cam shaft 36 will start to turn under the same driving means which operates the typewriter power roller 10 through the gearing 31, 38, 39. Common practice has shown that this shaft should turn at a speed of between 400 and 600 R. P. M. for the most satisfactory results. The clutch is so designed that the cam shaft 36 makes one half revolution per cycle. The cam shaft is provided with two step portions 36a which are adapted to engage the seeker levers in a manner which will be explained presently. In the normal position of the cam shaft, the seeker levers are held clear of the code bars 40 by virtue of a high portion 36b of the cam shaft -36. -As the cam shaft starts to rotate all seeker levels are urged to follow the contour of the cam shaft under the biasin-g 'action of their individual springs 35 as previously described.

However, the inherent design of the code bars is such as to arrest the movement of all but one of the seeker levers which is permitted to follow the contour ofthe cam shaft down to one'of the stepped portions 36a. Engagement of the selected seeker lever with the step 36a causes a downward movement to be imparted to the seeker lever which is transmitted to the connected key bar I] to cause the typewriter to print the corresponding character. When the typewriter key bar is near the end of its downward stroke the contour of the cam shaftis such as to effect disengagement of the seeker lever from the step 36a and force it and all the others away from the permutation bars so that these bars are free to return to their normal positions for the selection of the next character.

Fig. 1a shows a modified arrangement wherein the seeker lever guide comb M is provided with a .cam portion Ma. This cam portion operates against the lower'end of the selected seeker lever .so as to cam it out of engagement with the step 3500f the cam shaft 36 at the proper time. Inasrnuch as the mechanism is designed to function in response to short simultaneous coded impulses, as is evident from the description of the transmitting mechanism, some means is required for maintaining the code bars in their energized positions for a. sufiiciently lo'ng per i'od to Lperrnit 'analyzaticn by therseeker levers 'as previously described; Such a locking ime'a'nsis shown in '5, '6. Whenany 'code bar it b'eoernesener- -gized, its movement to the righ t is sufficient to cause projection 53 to engage lower portion '51 of bail 54 forcing it "to pivot to the right so as "to allow locking lever "5'5 to "fall o'ff latch point 43 I of bail 5 t'and assume a position oneith'er side of. a projection: as which is comrricn to all the :code bars thereby looking all the bars either energized or normal positions. The cede ba ts are thus looked until after rhea-naming operation has been performed at which time lever 55 is forced out of engagement with the code bars by a'cam'ED oncam shafttfiia n amount suificien't rto allow the code b'ars' to i eturnto nor-inal ain'li allow latch 'po'int' fii' onbalil 5'4 :teassu-me the "pa sition shown in Fig. 5 "which is e ec' ve to hold lever 55 in its latched position arse is released :by oam'ftll. :The 'trave'lof code bars lil ineither :directinn'isulimited by a stop plate 5-2 which projects up into a recess 48a provided in each of the code bars.

In order to insure the positive return of the code bars, a knock-off bail 63 is arranged to be operated near the end of the cycle by a cam 65 (Fig. 2) which is also fixed to the end of cam shaft 36. A spring 64 causes the knock-off bail to follow the contour of the cam 65.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the, art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. Translating apparatus of the class described comprising, in combination, a plurality of control magnets, permutation bars adjacent said magnets and positionable thereby, ,a plurality of character selection levers, a'plurality of seeker arms having pin and slot connections withsaid character elementsand coacting with the permutation bars so as to render one of the seeker levers operative and the remainder inoperative upon positioning of the bars bythe ,magnets, and a cyclically operating-stepped cam for engaging the seeker leverin operative position to impart movement thereto in one direction to effect printing and to move said seeker lever in a transverse direction to release it from the cam at a predetermined-time in the cycle. a

2. Translating apparatus of the class described comprising, in combination, a plurality of control magnets, code bars adjacent said magnets and positionable thereby, a rotating cam member having stepped portions and cam portions around its contour, a plurality of character key bars, operating armshaving pinand slot connections with said key bars at one end and being interconnecting said power means with said'elements having pin and slot connections with the elements and being biased toward engagement with thepower means, permutation means including code bars normally restraining the seeker arms away from said power means, a plurality of control magnets for positioning said code bars so that one of said bars is operated by the power means, and a common pivotal support for all of seeker arms adapted for limited movement manually to the side suflicient to permit all 01' said arms to clear the pins of the character selection 7 bars so that the arms and their support may be biased toward saidcam member at the other end,

all except one of said arms being restrained by the code bars from engagement with a stepped portion of said cam member, and said one arm upon engagement being moved in one direction by the stepped portion to operate the'related character key bar to effect printing and in another direction by the adjacent cam portion to' release the arm to cause the character key bar to be restored to normal.

3. Apparatus of the class described comprising character selection elements and power means for operating the same, individual operating means interconnecting said power means with said elements having pin and slot connections with the elements and being biased toward engagement with the power means, permutation means including code bars normally restraining said individual operating means from engagement with said 'power means, a plurality of control magnets for positioning said code bars so i that one of the operating means is operated by the power means, a supporting means for said operating means adapted to be manually shifted to a limited extent suflicientto break the pin and slot connections between the character selection elements and their individual operating means to permit all of the individual operating means to be removed together as a unit.

4. Apparatus of the class described comprising, character selection elements and power means for operating the same, individual seeker arms removed together as a unit.

5. A control unit attachment for a power driven typewriter pivotally mounted at one end and fastened securely to the typewriter at the other comprising, in combination, a plurality of character key bars each having a connectingpin projecting from them substantially at the perpendicular, a plurality of seeker levers having eyesat the top thereof adapted to fit over said pins in such a way as to allow normal operation of the typewriter, permutation. means for determining which of said levers is to become operative to be engaged by the power drive of the typewriter in accordance with a preselected code, and asupporting member for said seeker levers adapted to be shifted to one side upon uniastening the same to provide for the removal of all of said seeker levers together by simplyswinging the control unit about its pivot ina direction away from the typewriter.

6. Apparatus of the class described comprising character selection elements and power driv'en means for operating the same, individual seeker arms interconnecting said power driven means with said elements having operating connection 'th said elements and being biased towardengagement with the power means, permutation means including a plurality of code. barsnormally restraining the seeker arms away from said power means, electromagnetic means for positioning said bars according to a preselected character code so that one of the seeker levers is permitted to move into engagement with the power means, and a clutching device responsive to the movement of any one of said code bars for rendering the power driven engaged seeker lever to operate the character selection elements for the purpose" of recording the character. CHARLES R. DO'IY.

means effective to operate the

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