US2354520A - Typewriting machine - Google Patents

Description

July 25, 1944. w E HELMOND 2,354,520 I TYPEWRITlNG MACHINE Filed Dec 30, 1940 5 Sheets-Sheet l 570p SETT/IVG INVENTOR W/ZZ/AM F. HAL/VON!) ATTORNEY y 25, 1944- w. F. F lELMOND 2,354,520.

TYPEWRITING MACHINE Filed Dec. 30, 1940 5 Sheets-Sheet 2 INVENTOR W/LL/A/V l: HEL/VU/Vfl ATTORNEY 7 July 25, 1944. w. F. HELMOND TYPEWRITING MACHINE 5 Sheets-Sheet 3 Filed Dec.

m m I iiwwizz INVENTOR W/LL/AM 1 HEL/VO/VD BY IIIIIIIIIIA.

T ww ATTORNEY July 25, 1944. w. F. HELMOND TYPEWRITlNG MACHINE Filed Dec.

30, 1940 5 Sheets-Sheet 4 INVENTOR W/LL/AM EHELMO/VD ATTO R N EY July 25, 1944. W. F, 'H ELM'OND 2,354,520

TYPEWRIIlNG MACHINE Filed Dec. 30, 194o 5 Sheets-Sheet 5 INVENTOR h lLL/AM f. HEL MONO BY i K y v ATTORNEY Patented July 25, 1944 TYPEWRITING- MACHINE William F. Helmond, Clinton, Conn., assignor to Underwood Elliott Fisher Company, New York, N. Y., a corporation of Delaware Application December 30, 1940, Serial No. 372,297

29 Claims. ,(Cl. 197-63) This invention relates to key-settable margin stop mechanisms for typewriting machines, and more particularly to mechanismsof this character having provision for typing beyond each margin.

One of the objects of the invention is to provide a key-settable margin-stop mechanism having a simple and reliably operative margin-release device adapted upon actuation of a control key to release the carriage from within the normal line-typing limits, for typing beyond either margin, and adapted to be automatically reconditioned for the normal margin gaging of a typing line by merely returning the carriage to with in the line-typing range.

A further object is to provide a margin-release mechanism which is normally locked against release in all line-typing positions of the carriage, thereby to forestall unintentional margin release which would render the margin-stop mechanism temporarily ineffective for normal margin gaging.

Another object is to provide, in association with a margin-gaging mechanism having provision for automatically restorable margin'release and having letter-spaced carriage stops of identical form adapted to function either as left or right margin stops, an improved stop setting mechanism rendering a set stop effective for either right or left margin gaging.

A further object is to provide a safety device associated with the key-operable stop setting mechanism to prevent damage to the mechanism which would otherwise result when the setting mechanism is forcefully operated with the carriage banked at the line-start position.

The invention in certain respects constitutes an improvement on the one described and claimed in my copending application Serial No. 341,420, filed June 20, 1940, now Patent No. 2,316,865, dated April 20, 1943, and is also an improvement on the mechanism shown in the U. S. patent to Dobson, No. 2,196,790, dated April 9, 1940.

Improvements over the present invention'are described and claimed in a copending application of Newberry, filed April 21, 1942, now U. S. Patent No. 2,341,470 issued February 8, 1944.

In the physical embodiment of the invention illustrated, a series of key-settable stops identical in form are arranged at letter-space intervals on the carriage and are settable from a normal, ineffective position on the stop rack to an effective position engageable with a counterstop. A key operated stop setter is adapted to set any one of the stops positioned thereat by carriage ting station so that the stop being set serves to gage the line-end position of the carriage. The stop-setting mechanism includes a safety device to prevent damage to the mechanism when forcefully operated to set a right-hand stop with a left stop banked against the counterstop, the safety device yielding to'allow thesettingmechanism to move idly without damage-to the working parts. Margin-release mechanism is provided which, upon operation of a release key, re tracts the counterstop from its normally eifec tive position, thereby releasing the carriage for typing in either margin. A normally disabled latching device, conditioned for operation by depressing the release key, is rendered effective by relative movement of the counterstop and carriage with the latter banked at either margin. In that to effectively set the latching device requires relative movement of the carriage and counterstop, unintentional margin release which would render the stop mechanism" temporarily ineffective for normal margin-gaging is prevented. Said latching device holds'the counterstop retracted during in-the-margin typing and is released automatically, to free the counterstop for its normal margin-gaging function, by movement of the carriage to within-the-line-typing zone defined by the set margin stops.

In the drawings:

Figure 1 is a front elevational view of the margin-stop mechanism of the invention, in the condition of normal line typing, omitting the stop restoring element to facilitate illustration.

Figure 2 is a sectional view taken on a foreand-aft plane of the typewriter, showing the margin-stop mechanism in side elevation.

Figure 3 is a fragmentary plan view taken on line 33 of Figure 2.

Figures 4 and 5 illustrate the condition of the mechanism in setting a stop for either left or right margin gaging, Figure 4-showing a stop set to define the beginning of a .line, and Figure'5 showing the stop set for line-end gaging.

Figure 6 shows the condition of the mechanism with the carriage banked at the beginning-ofline position, or preparatory to release for typing in the left margin. 7 4

Figure 7 shows the mechanism in operated condition for typing in the left margin,

Figure 8 illustratesthe condition'of the 'mech-i begun typing in the right-hand margin.

tion following the Figure 10 showing, after having Figure 12 demonstrates the action in'restoringj I the mechanism from margin release for the usual typing between the margin-gaging stops. Figure 13 shows the operation of the safety deanism when operated to set a right-hand stop" with a left stop banked against the counterstop, and

1 Figure 14 is an exploded perspective view of the counterstop and other-elements directly associated therewith, also showing the stop setter. Referring to thedrawings for a more detailed description thereof, and particularly to Figures 1 and 2, the typewriting machine forming the em-' keys, not shown, for actuating type bars to strike a platen 2| on' the carriage. The carriage is actuated in letter-feed direction by the, usual spring drum, not shown, under control of an escapement mechanism 22; the wheel 23 of which may be geared tothe carriage by a pinion 24 and carriage rack 25. The carriage may be advancedv step by step in the conventional manner by the type bars engaging a universal bar 26 connected to a rockable bail 2'! pivoted at 28 and having an-operative connection 30 to an escapement dog carrier 3| cooperating with the wheel 23 in the During each type bar well-known manner. stroke, the carriage is advanced a letter space in line-typingv direction so that the type characters are successively imprinted in a typing line on the work sheet supported on the platen, I

A series of margin stops 34, identical in form throughout the range of carriage travel, are arranged at letter-space intervals on the carriage and are supported by a rack bar 35 secured at each'end to the carriage. Each stop 34 is slidable in the rack bar for position adjustment from a normal, ineffective setting to a projected position at which the lower end of the stop is disposed to engage va counterstop 36 during carriage travel. A detent springis provided to yieldably hold the stop at either of said positions. The stop rack organization may be of any suitable arrangement such as that shown and described in my Patent No. 2,146,821, dated February 14, 19 39. n bracket 31, securedto the rear trackway H, or other fixed member, of the machine, supports a pivot 38 providing a pivotal mounting for the counterstop 36 and other elements hereinafter described. The pivot 38 includes a screw 46 and a collar 4| threaded thereon, mounted on the bracket 31 as shown in Figures. 2 and 14. The counterstop 36 has a slotted portion 42 engaging the pivot 38, allowing the counterstop to swing laterally and moveup and down, a spring 43 yieldablyholding the counterstop norma :cooperative with mechanism hereinafter described. A sprin 41, assisted by spring 43, urges the upper portion of the shift lever and the counterstop rightward to its normal position as defined by the engagement of the lu 45 with 1 one side of a guide slot 48 in a cover plate 50. vice in yielding to prevent damage to the mech- ,7

t The stop-setting mechanism is so organized that any stop 34 positioned by carriage movement at the stop-setting station may be set for either rightor left-hand margin gaging. Two stop setting keys 5|, 52 are arranged adjacent the type keyboard of the machine for setting respectively the left margin and right margin stops, see Figure 1. Operation of either key 5| or 52, causes a stop setter 53 to be pulled downwardly so that a finger 54 thereon, in position at the stopsettingstation, projects the one stop 34 of the series at said station. The key 5| for setting a stop for left-hand margin gaging, is carried on a key lever 55 fulcrumed on a comb bar 56 and engageable with an intermediate lever 5! at 58. Figure 2. A bracket 60 on the bar 56 carries a stud 6| on which lever 51 is fulcrumed. Lever 51 is flexibly connected to the lower end of the stop setter 53 at 62, see Figures 4 and 5.

The key 52 for setting a stop for right-hand margin gaging, is carried on a key lever 63 pivoted on the comb bar 56 and is engageable with an intermediate lever 64 fulcrumed on the stud 6|, said lever having a slot 65 riding on said stud. A spring 66 acting on lever 64 yieldably holds said lever in a rightward position with the left end of slot 65 against the stud 6|. The free end of lever 64 carries a roller 61 adapted to coact with the cam 46 of the shift lever 44. The slot 65 extends from the stud 6| in a direction substantially at right angles to the general contour of the cam 46.

It may be here noted that the arrangement of the stop-setting finger 54 allocates the setting station just to the left of the counterstop in its normal position. To set a stop for left-hand margin gaging, the key 5| is depressed and the intermediate lever 51 pulls the stop setter down and thus sets a stop at the left side of the counterstop, see Figure 4. In setting a stop for righthand margin gaging, the key 52 is depressed and the intermediate lever 64 is, therefore, actuated. Said lever engages a pin 68 on lever 51 and thus pulls the stop setter down. However, during an initial portion of its stroke, the stop setter merely approaches the stop 34 without engaging same. During this initial movement, the roller 61, cooperating with the cam 46, actuates the shift lever 44 to swing the counterstop to the left of'the stop-setting station, see Figure 5, after which the stop is set to effective position to function as a right-hand or line-end stop. The leftward position of the counterstop 36 is defined by the engagement of lug 45 with the left side of slot 48 in the cover plate. Upon release of the stop-setting key 52, the spring 41 urges the counterstop 36 to its normal rightward position, shown in Figure 1, which position the counterstop assumes as soon as the right-hand margin stop is moved away from the stop-setting station.

The slot 65 and spring 66' constitute. a yieldable mounting for the lever 64, directed to avoid dam-- age to the setting mechanism whenpperated to set a right-hand stop with a. left-hand stop already in engagement, with the counterstop ifli, see Figure 13. In setting a right-hand stop/the initial movement of the key 52 brings the roller 61, into coaction with the cam' 46 to. swing the counterstop 36 leftward. I Counterstop movement, however, is obstructed by the left-hand margin stop, with the efiect that the shiftlever 44, is

the setting finger 54 merely idles over the set stop. As soon as key 52 is released, the spring 66causes the parts toassume their normal, inactive position shown in Figure 1. To assure proper normal operation of the stop-setting mechanism itwill be understood that the spring 66 is to be amply strong to Withstand the reactionary forces of roller 61 .and cam 46 which tend to displace lever 64 endwise from .its normal rightward position, Figure 1. Spring 66 is therefore of suflicient strength to overcome the force of spring 41 reacting throughthe cam and roller A stop-restoring plunger Ill, shown best in Fig ures 2 and 3, is adapted to engage any one of the stops 34 positioned at the stop station, to restore sameto ineffective position on the stop rack. The upper end of the said plunger is slid ably retained in the cover plate 50, just forward of. the counterstop 36 and has its lower end flexibly connected to an intermediate lever II, see Figure 1, pivoted at I2. A stop-restoring key 13 is carried on a key lever I4 pivoted at one end on a bracket I5, Figure 2, and includes a prong 16 overlying the free end of lever 'II. When the key I3 is depressed, the prong I6 moves downwardly to swing lever II and thereby raise the plunger I to restore a stop. Upon release of key I3, a spring TI returns thestop-restoring mechanism to normal, inactive position.

The margin-release mechanism operates to retract the counterstop 36 to inefiective position out of the path of the carriage stops 34, and, to releasably latch the counterstop retracted while the carriage is in beyond-the-margin positions, the latching device being automatically released by return of the carriage to within the line-typing zone. A counterstop retractor 80 is mounted for movement up and down, by means hereinafter described, and has a dog 8I projecting laterally therefrom and normally overlying a shoulder 82 on the counterstop 36. Anarm 83, forming part of a throw-01f device hereinafter described, is swingably mounted at its lower end on the pivot 38 and has a spring 84, anchored to the shift lever 44, yieldably holding said arm in the normal, leftward position shown in Figure 1. As shown more clearly in Figure 14, a pin 85 on said arm is engaged in a slot in the. retractor 66. The lower end of the retractor has a slotin which a pin 86 is engaged, said pin being carried on a lever 81 fulcrumed 0n the stud 6|. A

spring 88, interposed between the retractor 86 and lever 87, holds the pin 86 normally against the upper n orth not; Lever sf arenas rightward beyond its pivot and has a spring 89,

acting thereon to yieldably hold the retrjactor so in normal; raised position. A margin-release key roller 94 may' seat when the cam assumes the; several angular positionsof operation. The 111%" per part of the cam 95 presents a central tooth" 96 'is carried'on a key lever SI pivoted on the comb bar 56, said lever being engageable' at9? with the 'lever8'I, Figure 2.

A roller 94, carriedon the counterstop 36', 'co-" operates with a latching-"eamfi rotatably car-'' ried on the shiftlever' 44. The cam 95 has a series of faces w'ith'which the roll er 94 may en gage, includinga central recess 96 and rightand" left side recesses 91, 98 into each of which the m a fi t d le ie' b a .wriai m r r spaced insubstantial correspondence to the-re cesses 96,"9I, 98. With the rollerseateddn the ina'fter described. H v u During the usual line typing between limits H defined by the set margin stops 34, the mechacentral notch 65, the counterstop is projectedin the normal carriage-stop intercepting position? and when seated in jeitherouter recess 91 or 98, the counterstop is retracted out of the carriage" stoppath. The-outer recesses are,'therefore, a' greater distance from the cam pivot than is the Froni' this it will be Seen that the central recess. three recesses, regarded as a composite cam face, present a general contour issuing eocentrically each side of the cam center. The recessed form of the cam contour is employed to also obtain a detenting action of the roller 'on the am to de tent the latter accurately at its several angular positions, in each of minutes of the teeth I68,

, IIJI or I02 is adapted for engagement by-a set carriage stop.

The upper end of arm 83 carries a cam I63 presenting oppositely inclined faces which, in

cooperation with a pair of pins I64 on the latch ing cam 95, functions as a throwoff device" to displace the counterstop retractor 83 at a certain; phase of operation, and thus throw the retract'o'r' This displacement of thea'ctuato'r 83 by cam I63also' dog 8| off the counterstop shoulder 82.

serves to release the line-lock mechanism, herenisrn comprising the counterstop and associated elements for margin release and stop selection maintain substantially the relative positions shown best in Figure 1, except that in banking at a line end, Figure 8, said mechanism is swung leftward en masse. The pivotal axis of the .cam on shift lever 44, is substantially in alignment with the upper portion of the counterstop so that the central tooth I00 of said cam is normally aligned with the stop-engageable end of the counterstop when the cam 95 is in its normal, non-released position, defined by the roller 94 seating in the central recess 96. At said posi-v tion, the two pins I04 engage the opposite inclined faces of cam I63, said cam being pressed against said pins by spring 84. Through the medium of the pin-and-slot connection 85, they spring 84 also holds the retractor 83 in .its leftward position defined by the engagement of cam I83 with the pins I04,in which position the dog 8! overlies the counterstop shoulder 82.

The operation of the margin-release mechanism to free the carriage. for typingin a lefthand margin, is shown in Figures 6 and 7. When s'uchv typing is required, the carriage is usually; at the beginning-of-line position, Figure 6, with stop. It may be here noted that, after banking lever fll countercloclrwiseq The pin 86 is, thusmoved' downwardly and; after bottoming in the slot, pulls the retractor 80 down. vThe dog 8|, being engaged with shoulder .82, retracts the counterstop 36 and the roller 94 is thereby withdrawnfrom theqcam recess 96 The mechanism thus assumes, the conditionshown in V dot-anddash outline in Figure 6, with. the counterstop 36 retracted, out of the carriage'stop path but with;

thecentral cam tooth I still in .the stop path. The carriage is-thenmoved rightwardly, preferably toits limitv ofmovement; and the stop 34 engages tooth-J00, rotating earn: 95 to a position in which the right-hand recessf ill is substantially aligned with. ro1le r,!-l4. v ,While the cam is rotating, .,the.-upper pin. I04 coa cts with cam I03 to, shift the retractor 80-,rightward', causing, thedog 8| to ride. off shoulder; 82 and release the counterstop. Th counterstop is thus freed to move upwardly under influence of spring 43 until arrested by the seating of roller 94 in the cam recess 81, which holds the counterstop retracted, at the same timedetentingthecam 95 in the margin-release position, Figure 7. As-the dog 8| rides off the counterstop shoulder, spring 88 pulls the retractor farther downwardlyto the extent afforded by the pin-and-slot connection 86; ,so that the dog 8| is well below the level of the shoulder 82, thuspreventing a-possible reengagement of these; parts at anytime, as lon as the releasekey is held down, even though partly released.- .When the release key is released, the retractor 80 is raised to its normal elevation by spring 89, Figure 1, but is still held rightward free ofv the counterstop by pin I04 resting onthe high part of cam I03, as shown in Figure 7.

When the carriage is brought intothe normal line-typing zone, after typing'in the left margin,

themargin stop 34 is movedleftwardly by thiscarriage. movement and engages tooth I02 of the cam, The resultant rotation of cam 95 causes the roller-84 to .ride over the high-point between recesses 9B andQ'I, against the-force of spring 43, until. said roller seats in the central recess 96, Figure 6, thus allowing the counterstop to rise to effective position in the carriage stop path. In restoring cam v95 to its normal, non-released position, the upper pin- I04 rides off the high part of cam I03 and allows the retractor 80 to be moved leftward by spring 84, to thus engage the dog ill with the counterstop, Figure 1.

When the carriage isfbanked at line-end position, the counterstop, and associated elements are moved leftwardly to the Figure 8 position, at which the machine is locked against typing. In the illustrated embodiment, this line-locking'is effected by obstructing movement of the letterfeed universal bar, thereby disabling the letter. feed mechanism; although other well-known modes of line lockingmay be employed. As shown in Figures 2 and 3, alock lever I05 is pivoted on bracket 3'! to swing horizontally. An arm of said lever extends rearwardly into a slot I06 of the retractor 80. A second arm extends forwardly, having its end I01 normally, adjacent an arm I08 of the rockable bailZ'I. When the retractor 80 is in normal, quiescent position, Figure 1, or in aseacao i h n 9 3" 9 g t ma. rr drops .baclrafraction of a letter space to allow the escapement mechanism .22. to again assume.

an operated position to theright thereof, the

lever end I0! is moved into abutting relation with arm,,l08, thereby obstructing movement of the universal bar.26 and preventing the type bars 20 from striking theplaten.

. The several stages of operation, in efiecting margin release from the line-end or right-hand.

margin position, are shownin Figures 8 to 11.

In Figure 8,. the banking of the carriage at the line end has shifted the counterstop and asso-, ciated elements leftward, the counterstop 36 and shift lever 44 swinging about the pivot 38, thus further tensioning spring 41, the force of which holds the counterstop against the carriage stop. As the release .key 90 is depressed, the retractor 80 is pulled downwardly, as previously described, drawing the counterstop with it to the position shownin Figure 9,v at which the counterstop is about to ride off the carriage stop, and the roller 94 is partly withdrawn from the, cam recess 95. When the counterstop does ride off the carriage stop, the parts snap to the position showniin Figure 10, actuated by the spring 41. Accordingly,

the counterstop 36 and shift lever 44 have assumed their rightward position against the plate.

50, butthe cam tooth I00, remaining engaged with the carriage stop, has caused the cam 95 to be rotated initially by the rightward displacement of. the cam .pivot. This cam rotation has caused the lower pin I04 to coact with cam I03 thereby swinging the retractor 80 rightward to disengage dog 8| from the shoulder 82 to free the counterstop, the roller 94 of which now presses against cam 95. It will be observed that the rightward displacement of the retractor, acting upon the lockinglever I05, has released the universal bar 26 and the machine is conditioned for further typing beyond the line end. During this further typing, the carriage stop 34 travels leftward and completes rotation .of cam 95, so that the parts assume the Figure 11 position with the roller 94 seated in the cam recess 98, and with the counterstop latched retracted.

To restore the carriage for typing within the normal line-typing zone, the carriage is started in a return run, as shown in Figure 12. The carriage stop 34, proceeding from about the Figure 11 position, comes into engagement with the cam tooth l0l, thereby rotating the latching cam 95, which causes roller. 94 to ride over the high point between the recesses 96 and 98, the cam rotation continuing until the roller seats .in the central recess 96. This cam rotation carries the lower pin I04 off the high part of cam I 03 and the retractor is accordingly released to its leftward position under influence of spring 84. Thus, the retractor dog 8| again engages the counterstopshoulder 82 and the parts are restored to the Figure 1 position for normal line typing.

Although in this application, there is specifically described one embodiment which the invention may assume in practice, it will be understood that same is shown for the purposes of illustration, and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

I claim:

1. In a typewriter having a reciprocatory, carriage; a margin-gaging mechanism including;

at said point.

path of carriage-stop travel for engagement by said stops respectively to bar carriagetravel, in either direction, at said points; and means for movin holding and restoring the counterstop in respect to a carriage-stop engagement, said means including devices for withdrawing the counterstop from the path of carriage-stop travel, for holding it so withdrawn as the carriage passes beyond said points and until the carriage is returned to a position in which the counterstop is in advance of stop-engaging position, and for releasing and restoring (the counterstop to stop-engaging position when said returned position has been reached.

' '2. In a typewriter having a carriage movable in letter-space increments, a margin-stop mech- 1 anism including a plurality of uniformly-shaped selectively-settable' stops "arranged, slightly spaced in definite ratio to the letter-space increments, from approximately one end of the carriage to'the other, any of the stops, when set for carriage stopping, beingin alignment'with each other, counterstop means arranged in relation to a set stop to bar carriage travel atja point determined by the particular stop set, means adapted to eifect a change in the relationship between the counterstop means and the set stop,

irrespective of which of the plurality of ,settable stops has been set, to permit movement" of the carriage beyond said point; and means, operable in consequence of return of the carriage from be- "yond said point, and irrespective of which of the plurality of settable stops'has been set, to againset up a relationship between the counterstop means and the set stop to bar carriage travel 3. In a typewriter having a carriage movable in letter-space increments, a margin-stop mechanism including a plurality of stops arranged, slightly spaced in definite ratio to the letterspace increments, from 'approxirnately one end of the carriage to the other and selectively settable in alignment with each other to'define th'etwo margins, counterstop vmeans arranged in relation to any two of said stopsset on opposite sides thereof to bar travelof the carriage at ;points determined by the setsto'ps, means adapted to eifect a change in the relationship betweenthe counterstop means and one of thefsetstops to permit movement of the carriage beyond thecorresponding one of the points, and means operable in consequence of return of the carriage ffr'o'm beyond said one point to restore the relationship between thecounterstopmeans andsaid one set stop to bar carriage travelat the saidforielpoint.

"*4. In a typewriter having a carriage movable in letter-space increments, a margin-stop mech- 'anisrn including a plurality of'se'lectively settable stops arranged respectively atletter-spa'ce intervals from approximately one 'endofthelca'r- "riage to the other, a single counterstop adapted forarrangement between any two set stops'to cooperate ,With the confronting faces of the'two s et stops, respectively, in the same uprightplane of carriage travel, to determine a normal range 'of carriage travel which may be varied at will -;by the setting of different stops, means adapted toeifect a change in the relationshipbetween the counterstop and one'of the set stops to permit movement of th carriagebeyond the normal Grange of travel, and means operable in consequence' of return of the carriage to within'the normal range of travel to"restore the original ..rela-tionship between theisaid "(m e Stop and the counterstop. y

5. In a typewriter having a carriage movable in letter space increments, a margin-stop mech- 'anism including a group of stops near each carriage'end, the stops ineach group being uniform 5 and-arranged at slightly spaced intervals and being selectively settable to identical effective position in alignment witheachother, counterstop means arranged inrelation to stops set re- "spectively in each of said end groups, and on opposite sides of said counterstop means, to bar travel 'of the carriage at points determined by the set 'stops, means adapted to effect a change in the relationship-- bet v'veen thecounterstop means and either of the set stops to permit movement of the carriage beyond either point, and meansrop'erable in consequence of return of the "carriage past the point determined by the corresponding stop, to restore the relationship between the counterstop'means and the correspond- 1m; 'set stop to bar carriage travel at the said point. v 6. In a typewriter having a carriage movable in letter-space increments and a rack on the f carriage containing a series of slidable stops arranged at definite intervals from approximately one end of the carriage to the other, key-operable means for selectively setting said stops to present one" ori each sideof a counterstop to define a normal-typing range, acounterstop norf nally held in the path of the set stops on the carriage, key-controlled means for Withdrawing the counterstop from said path to allow move: ment of the carriage in either direction beyond "said normal typing range, means to latch said counterstop withdrawn during carriagemovement beyond thesaid range, and means operable upon return of the carriage to Within said range,--to unlatch the counterstop for resetting -it in the path of the set stops' onthe carriage.

40 7. A marginstop-mechanism'for a typewriter having a reciprocatory, letter-feed-controlled carriage, comprising in combination, a plurality of identical stops at letter-spaced intervals on the carriage selectively set table in alignment with each other, any two set stops beingadapted to define a typing rangebetween normal line ends; a' singlecounterstopnormally-in the path of the two set-stops-to'gagethe normal line ends 'in'tr'avel of the carriage,"means-todisengage the "counterstop and the set stop with which it has engaged, to permit additional carriage travel for typing beyond the" line end defined by theengaged stop; and means operable in consequencelief-restoration of the carriage to within the normal typing range, to restore the saidset stop "and counterstop to normal relation. 1 8. A mnargin-stop .mechanism for; a typewriter having a reciprocatorycarriage, comprising in combination, a plurality'of identical stops at letter-spaced intervals on the carriage selec- 'tivelysettable todefine a typingrange between normal line ends, a single counterstop normally "efiective to engage a setcarriage stop to gage a nh'ormal" line "'end, means for] rendering. said counterstopinefiective to permit additional car "ria'gej travel 'fortypihg'beyond' the normal line end, and -meanjs for r'leasably retaining the 'coun'ters'top inefie ctive during said additional "carriage travel, said retainingmeans being engage'able and actuable by the set stop and endered effective or ineffective by'relative move- '-'-mentfof the set stop and counterstop in appro- I "priate direction,

9. A'marginstopme chanism for a typewriter having a .reciprocatory' carriage, (comprising, in

- combination, a'stop on-the carriage, a counter- -stop'normallynrged to effective position to' en- *gagethe' carriage stop for gaginga normal line end? of carriage travel, key-operable means for I I moving the'counterstop to clear the carriage stop to ;permit:.additinal carriage travel for typing --bey0ndthe normal line end, and means for re- 7 leasably holding the counterstop so moved, duringesaidgadditional carriage travel, saidholding, '-.means being engageable and actuatable bythe carriage stop-rendered effective by carriage-stop cmovement in one-direction and renderedineffec- -.tive bycarriage-stop movement in the opposite .Zdirection; l L v v {1'0 A:.;.margin-stop mechanism for a type- -,writer'having a reciprocatory carriage, comprising, inscombination, a stop on the carriage, aretractable counterstop normally urged to effectiveposition to engage the carriage, stop for gaging a normal line end of carriage travel, means for. retracting the counterstop to clear the carriage stop to permit additional carriagev travel in one direction for typing beyond thenormal line end, and a latching device engageableand rendered effective by the carriage stop during said j additional carriage travel,, to latch the counterstop retracted, and engageable and rendered inefiective by the, carriage stop in carriage travel in the opposite direction, to automatically release the counterstop for return to efiective position. v I o 5 ll. A margin-stop mechanismior a typewriter having a reciprocatory carriage,-comprising, in combination, a stopon thecarriage,,a retractable permit additional .carriagatravel in onedirection u counterstop normally urged to effective,position to engage the carriage stop f0r;gaging a normal line end'of carriage travel, means ,for retracting the counterstop to clear. the vcarriage stop to for typing beyond the normal line end, and a p vo d .l tch nsismem e ngableinop os directions; in a plane, of carriage travel upon engagement ofqthe carriage stop therewith, to

latchthe counterstop retracted during said ad-,

,ditional carriage travel and, during carriage having a reciprocatory,

travel in theopposite direction, .to release, the

.i flunterstopifor' return to effective position,

12. 'A- margin-stop mechanismior a typewriter carriage, comprising in -combination, marginaging stops on the carriage defininga typing rangebetween normal line, ends, a retractable counterstop normally urged to stop-intercepting ,position for gaging the normal line ends key-r.

operable means to retract the,counterstop to permit additional carriage travel for: typing, be-

. yonda normal line end, a rotatable cam actuatable by ,the carriage stops and operative, upon relative stop and counterstop movement in one direction, to hold the counterstop retracted, said cam being actuatable to free the counterstop for restoration to stopintercepting position, upon 5 relative movement of thestopsand counterstop counterstop, 'a rotatabl'efcam' having aseri'es of faces on which said'follower is seatable, the faces' inlan opposite direction.

; 13 A margin-stop mechanis rnjfon a typewriter having a reciprocatory, carriage, comprising, in combination, a stop ,on thecarriage, a retra ctable counterstop normally: urged to eifective position to intercept the carriage stop for gaginga normal, V 70 line end of carriage travel,means for retracting the counterstop toclear the carriage, stop to permit additional carriage travel tor typing beyond the normal line, end, a cam follower onsaid letter-feed controlled 1 assgtgq being differently'spacedrrom the cam axisto gage 'thefcounte'rstop atstOp-cIearing and stopintercepting positions, said cam having portions engageable by the carriage stop in reciprocatory ,carriage' travel, to rotate the cam to the different counterstop-gaging positions.

14'. A margin-stop mechanism for a typewriter having a reciprocatory carriage, comprising in combination, margin stops'on the carriage defining 'a typing range between normal line ends,

a retractable counterstop normally urged to stopintercepting position, normally efiective keyop'erable means for retractingthe counterstop for typing beyo'ndthe normal line ends, releasable latching means engageable by the carriage stops andfoperative upon relative stop and counterdisable said retracting means, said disabling 'means,'upon relative stop and counterstop movement in an opposite direction, being rendered ineffective, to recondition said retracting means forj counterstop retraction.

15'. A margin-stop mechanism for a typewriter having a reciprocatoryc'arriage, comprising'in combination, margin stops on the carriage defining a typing range between normal line ends, a retractable counterstop normally urged to "stop-intercepting position, normally effective key-operable means for retracting the counterstop to permit typing beyond the normal line ends, releasable latching means engageable by the carriage stops and operative upon relative stop and counterstop movement in one direction after stop interception, to latch the counterstop retracted, and means operable by said latching 'means in latching the counterstop, to disable said retracting means, said latching means, upon relative stop and counterstopmovement in an opposite direction,- being releasable to free the counterstop for restoration and render said disablin'gmeans ineffective.

16. A margin-stop mechanism for a typewriter having a reciprocatory, letter-feed-controlled carriage, comprising in combination, margingaging stopson the carriage defining a typing range between normal line ends, a retractable counterstop normally urged to, stop-intercepting position for gaging the normal line ends, a keyoperable retractor adapted for coupling with the counterstop, normally urged to coupled 'rela- "tiontherewith and operative to retract the counterstop to permit additional carriage travel for typing beyond a normal line end, releasable latching means engageable by the carriage stops and operative upon relative stop and counterstop movement in one direction, forlatchingthe counterstop retracted, and] means ,operablejby said latching means to'juncouple said vr ac 1 from thecounterstop and' therebyfrelease the i counterstop. to control ofthe latching means; said latching means being releasable to free the counterstopsfor restoration to stop intercepting position, upon relative stop and-gcounterstop movementv in an opposite direction; in restoring ,Qthecarriage to within thenormal typing range.

a having a reciprocatory, letter-feed -controlled =17." A mar'gin-st p mechanism for aitypewriter carriage, comprising in combination, margin- ,aesasgo gaging stops on the carriage defining a typing range betweennormal line ends, a retractable counterstop normally urged to stop-intercepting position for gaging the normal line ends, a keyoperable-retractor adapted for coupling with the counterstop, normally urged to coupled relation therewith and operative to retract the counterstop to permit additional carriage travel for typing beyond a line end, a rotatable cam actuatable by the carriage stops and operative upon relative stop and counterstop movement in one direction, to hold the counterstop retracted, and means operable by said cam to uncouple said retractor from the counterstop and thereby release the counterstop to control of the cam, said cam beingactuatable to free the counterstop for restoration to stop-intercepting position, upon relative movement of the stops and counterstop inian opposite direction in restoring the carriage to within the normal typing range.

18. A margin-stop mechanism for a typewriter having a reciprocatory carriage, comprising, in combination, a plurality of identical stops at letter-spaced intervals on the carriage, selectively key-settable at a station to define a normal typing range between normal line ends, a retractable counterstop normally urged to carriage-stop-intercepting position to gage a normal line end, means mounting said counterstop for shifting in the direction of carriage travel, between limits defining a normal position to the right of said stop-setting station and a shifted position to the left of said station, means yieldably holding the counterstop in the normal rightward position, means to retract the counterstop to stop-clearing position to permit additional parriage travel for typing beyond. the normal line end, and means engageable and actuatable by a set carriage stop to latch the counterstop retracted during said additional travel, and en-. gageable and releasable by a set stop in carriage travel to within the normal typing range, to automatically release the counterstop to effective position.

19. A margin-stop mechanism for a typewriter having a reciprocatory, letter-feed controlled carriage, comprising in combination, a plurality of identical stops at letter-spaced intervals on the carriage, selectively key-settable at a station to define anormal typing range between normal line ends, a retractable counterstop normally urged tocarriage stop-intercepting position to gage anormal line end, means mounting said counterstop for shifting in the direction of carriagetraveLbetween limits defining a normal position to the right of said stop-setting station and a shifted positionv to the leftv of said station, means yieldably holding the counterstop in the normal rightward position, means to retract the counterstopto stop-clearing position to permit additional carriage travel for typingbeyond the normal line end, and a latching, device carried on said ,m ounting means and engageableand actuatable by a set carriage stop to .latch the' counterstop retracted during said additional ,travel, and engageable and releasable by a set 20. A margin-stop mechanism for a typewriter stop setting. I

counterstopnormally urged to. carriage stopintercepting position to gagea normal; line end, means including 'ashift gmember mountingvsaid counterstop for shifting in the direction ,ofcarriage travel, between limits defining a normal position to the right of said stop-setting station and a shifted position to the left ofsaid station, means yieldably holding the counterstop inqthe normal rightward position, means to retract-the counterstop to stop-clearing position to permit additional carriage travel for typing beyond the normal line end, and a latching device carried onsaid shift member and engageable andtactuatable by aset carriagestop to latch the counterstop retracted during said additional travel, and engageable and releasable by a set stop incarriage travel to within the normaltyping range, to automatically release the counterstop to effect p t n u 21, A margin-stop mechanism fora typewriter having a reciprocatory, letter-feed controlled carriage, comprising in combination, a plurality .of identical, settable stops at letter-spaced intervals on the carriage, key-operable means .to set any one of said stops, positioned by carriage movement, at a stop-setting station, a retractable ,counterstop normally urged to carriage stop-intercepting position to gage a normal line end, means including a shift lever mountingsaid counterstop for shifting in the direction of, carcounterstop to stoprclearing. position to permit additional carriage travel for typing beyond the normal lineend, and means carried on said shift lever {to releasably hold the counterstop retracted and actuatable by a set stop, to be rendered effective or ineffective thereby, depending on the direction of stop movement, saidkey-operable means including a pair of keys and meansoperable by one of I saidkeys to actuate. said shift lever to move the counterstopleftward prior to 22. A marginestop mechanism for a -typewriter having a reciprocatory, letter-feedecontrolled carriage, comprising, in combination, aplurality of identical, settable stops 7 at letter spaced intervalson the carriage, key-operable means to set anyone of said stops, positioned by carriage movement, at a stop-setting station, asingle counterstop normally effective toengage a set carriage stop to gagea normaLlineend; means inc udin a shift lever mounting saidcounterstop for shifting in-eth e direction of, carriagetravel,

. rightward positiomsaid key-operable means inhaving a reciprocatory, letter-feed controlled carriage, comprising in combination, a plurality of identical stops at letter-spaced intervals on the carriage, keyes ettable at a station to definea typine ange betw m rma lin -finds a retra tab cludingapairof keys, associated actuating. levers .;-and a cam-and-follower ,clevice operable by the .lever of one of said keys' toactuate saidshift vciated therewith allowing said cam-and-follower to idle "although-said, shift levernisqblocked against movement,

23-. A margin-stop mechanism ,for'a typewriter having a reciprocatQry, letter-feedecontrolled set any of said stops, positioned by carriage movement, at =astop-setting station, for gaging the normal right and left line-ends, a retractable "counterstop normally urged to position to inter- =cept the set stops, means including a shift mem- =ber mounting said counterstop for limited shifting 'in the direction of carriage travel to opposite sides of said setting station, means yieldably holding the counterstop at one side of said station, a key-operable retractor adapted for"coupling with the counterstop and normally urged to coupled relation'therewith and operative to retract the counterstop to permit additional carriag travel for typing beyond a normal line end,

l counterstop latching means carried-on said shift member'gengageable by the set stops and operative t'o l'a'tch the counterstop retracted, after "stop interception and upon relative movement of the stop and the counterstop with the shift member, following counterstop retraction, means operable by said latching means to uncouple the retractor from the counterstop and thereby "release the counterstop to Control of said latching-means, said latchingmeans being releasable to free the counterstop for restoration to stopintercepting position, upon movement of the stops in a direction opposite that-by which the latching means is first rendered operative;

7 24; A'margin-stop mechanism for a typewriter liaving a reciprocatory letter-feed-controlled carriage, comprising in combination, a'plurality of letter-spaced stops on thecarriage; means'to set any-of said stops, positioned by carriage movement, ata stop-setting station, for gaging the normal right and left line-ends, a retractable counterstop normally urged toposition to intercept the set stops, means including a shift'member mounting said counterstop for limited shifting in the direction of carriage travel to opposite sides of said setting station, means yieldably holding the counterstop at one side of said station, a key-operable retractor adapted for coupling with the counterstop and normally urged to coupled relation therewith and operative to retract the counterstop to permit additional carriage travel for typing beyond a normal line end,

a rotatable cam carried on said shift member, engageable'by the set stops and operative; to hold the counterstop retracted, after stop interception and upon relative movement of the stop and the counterstop with'the shift member, following counterstop retraction, -means operable by said cam to uncouple the retractor from the counterstop andthereby release the counterstop to control of said cam, said cam'being operable to free the counterstopfor restoration to stop-intercepting position, upon movementofthe stops in a direction opposite that bywhich the latching -means-is first'rendered operative. l r

25. Amargin-stop mechanism for atypewriter 1 having a reciprocatory, letter feed controlled carriage, comprising in combination, a plurality of letter-spaced stops on the carriage, key-operable means to selectively set any of said stops, positioned by carriage movement, at a stop-setting station, for gaging the normal right and means yieldably holding the tively operable, means operable by said setting means when operated selectively, to shift said member leftward prior to setting a stop for gag- --ing a right'lin'e end, a key-operable retractor adapted for coupling with' the counterstop, normally urged to coupled relation therewith and operative to retract the counterstop to permit additional carriage travel for typing beyond a normal line end, counterstop latching means carriedon said shift member, engageable by the .set carriage stops and rendered effective to hold the. counterstop retracted; after stop interception and. upon stop movement rightward or counterstop and'member movement rightward, following u counterstop retraction, and means operable by said latching means to uncouple the retractor from the counterstop and thereby release the counterstop to control of said latching means, said latching means being releasable to free the counterstop for restoration to stop-intercepting position, upon movement of the stops in a direction opposite that by which the latching means is rendered effective.

'26. Inv a typewriting machine having typing instrumentalities, a letter-feed-controlled, re-

ciprocatory carriage and a line-lock device for disabling the typing instrumentalities; a marginstop mechanism comprising, in combination, a

- series of letter-spaced stops on the carriage, settable at astop-setting station, for gaging the normal line ends, 'a retractable counterstop normally .urged to stop-intercepting position, means including a shift member, mounting said counterstop for shifting between limits defining a normal position to the right of said stop-setting station and a shifted position to the left of said station, means yieldably holding the counterstop in the normal rightward position, a keyoperable retractoroperatively connected to the line-lock 'device and adapted for coupling with the counterstop, being normally urged to coupled relation therewith, the line-lock device being 'inefiectivewith said retractor coupled and the counterstop in normal rightward position, leftward travel and interception of a set stop by the counterstop causing shifting of the counterstop and retractor to :operate the line-lock device, releasable latching means carried on said shift member and actuatable bythe set carriage stops to latchthe counterstop retracted after operation of the retractor, an'dmeans operable by said latchingmeans to uncouple the retractor and thereby. release the line-lock device and free the counterstop to control of the latching means,

said; latching means being releasable to free the .ic'ounterstop for; restoration to stop-intercepting position and-to allow recoupling of the retractor, upon movement of the effective, set stop in a rightward direction of'carriage travel.

2'; A margin-stop mechanism for a typewriter having a'reciprocatory carriage, comprising, in combination, a plurality of letter-spaced stops on the carriage, key-operable means to set any of said'stops', positioned by carriage movement, at a stop-setting station, for gaging the normal right and left line ends, a retractable counterstop normally urged to position to intercept the set stops, means'including a shift member mounting said counterstop-for shiftingbetween limits defining a normal position to the right of said stop-setting station and a shifted position to the left ofgsaid station, means yieldably holding the counterstop in said normal, rightward position,

' sai'd' ky operable setting means including a pair of keys and 'meansoperable by'one of said keys to shift said member leftward prior to setting a stop for gaging the right line end, a key-operable retractor adapted for coupling with the counterstop, normally urged to coupled relation therewith and operative to retract the counterstop to permit additional carriage travel for typing beyond a normal line end, latching means carried on said shift member, engageable by the set stops and rendered effective to hold the counterstop retracted, after stop interception and upon stop movement rightward or counterstop and shift member movement rightward, following counterstop retraction, and means operable by said latching means to uncouple the retractor from the counterstop and thereby release the counterstop to control of said latching means, said latching means being releasable to free the counterstop for restoration to stop-intercepting position, upon movement of the stops in a direction opposite that by which the latching means was rendered effective.

28. A margin-stop mechanism for a typewriter having a reciprocatory, letter-feed-controlled carriage, comprising in combination, a plurality of letter-spaced stops on the carriage, means to set any of said stops, positioned by carriage movement, at a stop-setting station, for gaging the normal line ends, a counterstop normally urged to stop-intercepting position, means mounting said counterstop for endwise retractive movement transversely of the direction of carriage travel and for pivotal movement in the direction of carriage travel, a pivoted shift member slidably guiding said counterstop, means including said shift member for limiting counterstop pivotal movement between a normal position to the right of said stop-setting station and a shifted position to the left of said station, means acting on said shift member for yieldably holding the counterstop in the normal rightward position, a key-operable retractor mounted for oscillatory movement to and from the counterstop and endwise movement with the counterstop, said retractor having a part engageable with the counterstop to retract the latter to stop-clearing position for typing beyond a normal line end, means urging said retractor to counterstop engagement, a rotatable cam on said shift member, engageable and actuatable by the set carriage stops and adapted, in moved position, to hold the counterstop retracted, and a cam fixed on said retractor, said rotatable cam having a projection cooperative with said fixed cam to swing the retractor out of counterstop engagement when the rotatable cam is actuated to moved position, to thereby release the counterstop to control of the rotatable cam, said rotatable cam, upon return of the carriage from beyond a normal line end, being returned from moved position by the associated carriage stop to release the counterstop to effective position and to release the retractor for counterstop reengagement.

29. A margin-stop mechanism for a typewriter having a reciprocatory, letter-feed-controlled carriage, comprising, in combination, a plurality of letter-spaced stops on the carriage, key-operable means to set any of said stops, positioned by carriage movement, at a stop-setting station, for gaging the normal line ends, a counterstop normally urged to stop-intercepting position, means mounting said counterstop for endwise retractive movement transversely of the direction of carriage travel and for pivotal movement in the direction of carriage travel, a pivoted shift member slidably guiding said counterstop, means including said shift member for limiting counterstop pivotal movement between a normal position to the right of said stop-setting station and a shifted position to the left of said station, means acting on said shift member for yieldably holding the counterstop in the normal rightward position, a key-operableretractor mounted for oscillatory movement to and from the counterstop and endwise movement with the counterstop, said retractor having a part engageable with the counterstop to retract the latter to stopclearing position, means urging said retractor to counterstop engagement, a rotatable cam on said shift member, engageable and actuatable by the set carriage stops and adapted, in moved position, to hold the counterstop retracted, a cam fixed on said retractor, said rotatable cam having a projection cooperative with said fixed cam to swing the retractor out of counterstop engagement when the rotatable cam is actuated to moved position, to thereby release the counterstop to control of the rotatable cam, said rotatable cam, upon return of the carriage from beyond a normal line end, returned from moved position by the associated carriage stop to release the counterstop to effective position and to release the retractor for counterstop reengagement, said stop-setting means including means operable on said shift member to shift the counterstop to its leftward position prior to setting of a stop at the right of the counterstop.

WILLIAM F. HELMOND.

Images