US2375526A - Typewriting machine - Google Patents

Description

'TYPEWRITING MACHINE Filed Sept. 16, 194,2A 6 Sheets-Sheety 1 ACHILLE CULUMB INVENTOR.

AGENT May 8, 1945- A. COLOMBO' 2,375,526

'TYPEWRITING MACHINE 6 Sheets-Sheet 2 Filed sept. 16. 1942 MHME CULUMBU INVENroR.

May s, 1945.. 7 ACLOMBO 2,375,526

' TYPEWRITING MACHINE Filed Sept. 16, 1942l 6 Sheets-Sheet 5 4MIL-HLLE CULUMB INVENTOR.

AGENT May 8, 1945- l i y A. COLOMBO 2,375,526

TYPEWRITING MACHINE Filed sept. 1e, 1942 e sheets-sheet 4 ACHILLE COLOMBO INVENTQR v AGENT May 8, 1945 A. COLOMBO i 2,375,526

TYPEWRITING MACHINE Filed sept. A16, 1942 6 sheets-sheet 5 AEHLLLE CULDMBU INVENTOR.

May 8, 1945. A. COLOMBO TYPEWRITING MACHINE Filed Sept. 16, 1942 6 Sheets-Sheet 6 los Los'

AOHLLE COLOMBO INVENTOR AGENT Patented May 8, l1945 UNITED STATES VPArlazN'r OFFICE TYPEWRITING MACHINE Achille Colombo, New York, N. Y.

Application September 16, 1942, Serial No. 458,496

Claims. (Cl. 197--11) jointly operating two keys arranged in separate keyboards.

More specic objects of the invention will be come apparent by reference to the principles ol operation of the machine hereafter set forth. In a machine of this class, the types are grouped on a limited number of type-carrying members, each having a plurality of types, and each member must be movable vinsuch a manner as to permit the selection of anyone of the types carried thereon, to cause any desired type to leave its impression on the paper when said type-carrying member reaches its writing position.

Means controlled by the keys of one of the two keyboards effect the selective movement of said type-carrying members (which. movement may be completed at any time not later than the moment in which the members reach their writa corresponding simplification in the mechanism connected with the keys; this means simplication of construction and reduction of the cost of manufacture.

ing position); means controlled by the keys o f the other keyboard are simultaneously, or in quick succession, actuated to cause the members to assume their writing position.

It is thought that this system of typing oiiersl considerable advantages for the reasons set forth in my copending application Ser. No. 415,517, now Patent No. 2,311,737, wherein a similar arrangement of keyboards has been described with reference, however, to an entirely different type of power-driven machine.

The advantages attained by means of this syse` tem, when applied to hand-driven typewriters, are still `more evident. When a single key is employed for the typing of each character, as in conventional typewriters, the typingof the necessary signs, which number about eighty, requires forty keys, plus a supplementary shift from small to capital letters, and vice versa. 0n the I contrary, my system of'typing wherein the typ- The reduction in the number oi' keys leads I.

'berofF-lg.8;

Furthermore, my system of typing permits to distribute between two lingers .the work that is normally done by a single finger. In the type-sV writers that are now 'generally used, a single linger operates several parts of the machine: the Writing means, the carriage, and the inking ribbon. In a machine according to my invention one of these parts can be operated by one finger and the others by another linger, with the result that the work of each linger is rendered considerably lighter, and the space traveled by each key is shortened; the speed of operation is therefore increased and the fatigue of the operator is lessened.

'I'he means whereby the objects of my invention are attained will be readily understood by reference to the description and drawings that illustrate preferred embodiments of the invention.

In the drawings: l

Fig. 1 is a vertical front view of the machine showing the type-carrying members, the selector and the actuating device, and the controlling 1 sets of keys;

Fig. 2 is a vertical side view of the same structure in the plane 2-2 of Fig. 1 in the direction of the arrows, showing part of the selector means;

Fig. -3 is another vertical side view of the same structure showing the rest ofthe selector means;

Fig. 4 is a vertical side view -of a different embodiment of the invention, showing the actuating device and part of the selector mechanism;

Fig. 5 is a vertical side View, ona greater scale,

lof a detail of the selector mechanism accordingA to the embodiment of Fig. 4;

Fig. 6'is a plan view, also on a greater scale, of the-same device; p y Fig. 7 is a diagram illustrating the possible positions of part of the selector mechanism; y

Fig. 8 is a vertical side view of a writing member according to the embodiment of Fig. 4, with part of the structure broken off to show the mechanism contained therein;

Fig. 9 is a vertical section of the writing mem- Fig. 10 is a vertical front view of A the same writing member: j

Fig. 11 is a vertical side, view of the machine according to still another embodiment of the inveritionshowing the actuating and the selector mechanism;

Fig. 12 is a plan view, on a reduced scale, of

the selector mechanism showing also the particular arrangement adapted in this embodiment for the two sets of keys, and

Fig. 13 is a detail, on a greater scale, of the selector device.

In Figs. 1 to 3 there is illustrated an embodi- .ment of my invention. Referring now in detail to these figures, I indicates the frame of the machine, only partly shown, 2 the carriage, and 3 the paper-carrying roller; letter and line feeding means as well-as the inking device, not shown in 1 the figures, may beA conventional.l

There are provided nine type-carrying members that comprise sectors 41 49, each carrying a plurality of types uniformly spaced thereon (as shown in Figs. 2 and 3), and sector bars 51 51:

-bars 51 5s, and the lower end thereof is slotted to receive pivots |21 I 2n of L`shaped levers |31 v|39 mounted on a bar I4 supported 1 by aforementioned uprights 8 and 9.

Links |51 |59 connect said L shaped levers to arms |61 V| 6s that are pivoted to the frame ofthe machine and carry keys |11 of these keys is inl this manner operatively con-v nected to one of bars 51- 59 and has marked thereon the same characters or signs that are carried by the corresponding type-carrying member. f

'I'hese keys may be designated as the actuating keyboard as they serve to cause any desired type to leave lactually its impression on the paper. It will be readily understood that by depressing one of the keys, as shown in Figs. 1 and 2, the various parts described above will cause the correspond-l ing sector to move forward toward the papercarryingroller thereby causing one 0f the types carried by the sector to come into contact with the paper. and to leave actually its impression thereon, the mechanism being, of course, Aso arranged as to cause all the sectors to strike the paper-carrying roller at the same point, since, in this respect, the invention involves no departure from conventional structures.

As the sectors have nine types each, arranged thereon at suitable angular intervals, it is clear that in order to allow all of the nine types to come into contact with the paper-carrying roller thetype-carying members must be capable of assuming nine different angular;` positions. The

lfollowing `device is employedto determine selectively' anyone of said positions.

- 231 239; the length of said links is such that the sector bars will be held in a horizontal position when bar 2| is in the central position within 1- the ysector--shaped upper portion'of uprights |l,

I9 and 20, position in which it is normally held by theaction of double springs 24, 25 and 25 that 'engage the opposite faces of blades secured to bar 2| and' protruding therefrom, as shown in Fig. 3.

In this normal position of the sector bars, the central type on any one of sectors 41 4s will come into contact with the paper-carrying roller whenever the corresponding actuating key is depressed. It is clear that by moving bar 2| upwardly or downwardly from its aforementioned central position, the sector bars 51 5s will be caused to assume various angular positions ywhereby any type will be allowed to come into contactwith the paper-carrying roller when the type-carrying members are moved toward this latter.

An embodiment of the means that may be used for selectively movingl bar 2| by any amount desired will now be described. As all sector bars 51 5s are normally held in a horizontal posi tion wherein allnine central types on the sectors p are normally ready for typing when the correspending actuating keys are depressed, there have to be provided only eight other positions of bar 2 I, and a selector keyboard of eight keys is needed; each of said keys will have marked thereon one of the types of each sector,` that is all those types,4 that are located in the same position on the various type-carrying members. A ninth key may be provided having marked thereon the nine central types, it beingunderstood, however, that such a key will not be operatively connected with the selector mechanism. y

Four positions'can be obtained by moving bar `2| upwardly, and the other four by moving it downwardly. The four higher positions whereby 321 324 are pivoted at their lower end to arms frame of the machine.

211 214. Members 331 prole and is normally urged by springs 311 314 against a roller freely mounted en horizontal b ar 34 that is supported by uprights 35 and 38. When a key is depressedone of members 3 31 334 is lifted and engages the bottom face of bar 2| being guided Athereto by the proille of th recessed portion provided in the member itself; bar 2| is in turn lifted by the proper amount` which is determined by the length of the member engaging said bar. lengths to allow bar 2|4 to assume the-,four different positions required. A f

Onreleasing the key, all parts will be returned to their initial position, the return motion of membersv 331 444 being aided by Springs 311 l. 314, and bar 2| being caused to assume again its initial position by springs 24, 25 and 26. A similar mechanism is employed for obtaining the` four lower positions of bar 2|, as shown in Fig. 3. Fourmembers 381 A384 having different lengths are pivqted to arms 391 394; these latter carry -keys and are in turn pivoted to the Said members are provided with a hook-shaped upper portion and a recessed portion having a cam-like profile in their face nearest t0 the roller of bar 34. Springs 334 are provided. with a recessed portion which is given a cam-like- The four members are given different 401I 404 normally urge said recessed portion against said roller. Whenever the key of one of arms 391 394 is depressed, the corresponding member 38 is lowered and guided lby its recessed portion to engage the upper face of bar 2| with its hook-shaped upper portion; bar 2| is therefore lowered by the amount desired which is determined by the length of the engaging member.

The release of the key together with the action of springs 24, 2,5 and 26 will return all the parts to their initial position. It will, of course, be understood that for proper operation of the mechanism described bar 2| is constantly held in a horizontal position during its upward or downward movement from its normal central position within the sector-shaped upper portion of 4the aforementioned uprights I8, I9, this maybe obtained by means of any suitable device of a known type such as, for instance, applied to drawing tables for similar purposes.

Figs. 11 to 13 illustrate a modification ofI the embodiment hereinbefore described comprising a different selector mechanism; the figures also.

show by way of example a different arrangement of the two sets of keys wherein a diierent num- Thel actuating keyboard, placed at the typists right, consists of thirteen keys that are operatively c'onnected to as many type-carryingh'nembers; each of said members comprises a sector bar 85 and a type-carrying sector 86 provided with six types, the total number of types being therefore 78, that is approximately the same total number as in the previous embodiment.

It is thought thaty a selector keyboard of only ve' keys may be advantageously adopted inasmuch as in this case one of the typists hands can control the selection of anyone of the types without having to move at all about the keyboard; on the other handthe slightly increased number of keys of the actuating keyboard, still greatly reduced in comparison with conventional typewriters, will not noticeably increase the labor to be performed by the other hand.

'I'he type-carrying sectors. 86 are caused to move toward the paper-carrying roller by means` of a similar mechanism to that described with reference to the previous embodiment. Said mechanism comprises uprights 81 and 88 which support horizontal bar 89, a lever 90 for each type-carrying sector freely mounted on said bar 89, and pivotally connected at 9| to one end of a sector bar 85 and slotted at its lower end to receive pivots 92 of an L shaped lever 93; this latter is mounted on a bar 94 which is also supported by the aforementioned uprights 81 and 88. I

A link 95 connects each L shaped lever 93 to one of arms 96 which carry the keys that form the actuating keyboard; the depression4 of any of these keys will therefore cause the corresponding type-carrying member to move toward the papercarrying roller. As each type-carrying sector is provided with six types, each actuating key will have marked thereon six characters instead of nine as in the first embodiment.

The selector device is a follows:

Two orV more. suitably pled uprights 91 support a horizontal bar 98 whe epn there are freely mounted, at a point intermediate their ends, thirteen members 99, one for each type-carrying member; each of said members 99 halspivotal1y mounted at 00, a member |0| which in turn is connected at |02 to one of sector bars 85. Members 99 and |0| normally engage each other by means of a ridge-groove device |03-I04 (as shown in detail in Fig. 13) so that they normally function as a single lrigid unit, the total length of which is so calculated as to maintain sector bars 85 in a horizontal position. It is apparent that as long as said members 99 and |0| function as a.

single rigid unit, the sector b ars will be caused to move in a horizontal plane toward the papercarrying roller whenever the actuating keys are depressed, and therefore the lowermost type on any of the type-carrying sectors 86 will be caused to come in contact with the paper.

In order to cause selectively sector bar s 85 to follow different paths upon depression of the actuating keys, so as to cause selectively anyone of the remaining five types to leave its impression on the paper, there is provided the following mechanism. .l

Each of the ifi e arms .|05 that carry the five keys of the selector keyboard, is connected by a link |06 to one end of a lever |01 which has its .other end freely mounted on a bar |08 fastened lEach lever |014 to the frame of the machine. has, at a point intermediate its ends, a link |09 which connects 01 to the lower end of a member |0 freely mounted on a bar and this latter is supported by uprights ||2, ||3 and III. All links |09 are mounted intermediate the ends of the levers |01 but at different points, and the lower end of members 0 is comb-shaped; the purpose thereof will hereafter become apparent.

The upper end of members ||0 is secured to a horizontal bar ||5 which extends underneath all thirteen type-carrying members, said members ||0 being normally located in such an initial position that bar ||5 will be held in the position shown in dotted lines at H5 (Fig. 11) wherein it will not engage any member 99 when this latter is caused to rotate about 98 during the forward motion of sector bar 85 due to the depression of an actuating key.

When, however, a selector key is depressed, |06, |01 and |09 will be caused to assume the position |06', |01 and |09', consequently v||0 will rotate about thereby causing bar ||5 to move from its initial position H5' to a different position (as the one shown in full lines in Fig. 1l) wherein 'i it will engage member 99 during the rotation of l portion of its movement toward the paper-carryl ing roller so that the lowermost type on the typecarrying sector will no longer come into contact with the paper-carrying roller.

The amount of deviation from the horizontal plane, that is the angle of the plane wherein the sector bar is caused to travel with respect to the horizontal plane, determines which one of the ve remaining types will actually contact the paper. Obviously, this angle is in turn determined by the point'of contact of member 99 with bar ||5.

In order to determine selectively five different 4 points of contact (that Awill be angularly stag gered by a convenient amount having regard to the dimension-of the'various parts and the ari--` gular interval between any two adjacent'types),` links |09 aremounted on levers'l01 at different' points intermediate the ends of these latter levers so that the depression of the various selector keys will cause the various members 'to rotate about Il I by vsuitably different amounts. As all members- |I0 are secured `to bar I |5, and all are therefore'caused to rotate when lany one of the selector keys is depressed, the lower part of said members ||0 is provided with a comb; links |09 are mounted therein and are allowed to slide in their slot so that all of links |09 that are connected with one of the keys which are not depressed will not be affected by the motion of bar H5. 4Coil springs ||6 and ||1 return members H0 and bar H5 to their initial position when the selector keys are released after the typing of any desired character. The release of the actuating keys and arms willreturn sector bars 85 to their pulley 6| are made of diiferent materials for the purpose of securing such a friction between the tive to 41, thereby also determining which one of the types is moved to the proper position for coming into contact with the paper-carrying roller. v v

The mechanism for selectively obtaining the desired amount of motion of 6| relative to 60 will now be described.

All writing membersrare normally held in the initial position shown in Fig. 4, and theirtypecarrying sectors 55 are normally located relative initial position thereby e150 causing iol to' rotate in a backward direction to come' again into engagement'with |09.

Figs. 4 to 10 illustrate another embodiment of .the invention.

Numerals 4|, 42 and43 denote, respectively, the frame of the machine, the paper-carrying rollei' and the carriage. 'I'he two sets 'of keys that con-v sist of eight selector keys carried by arms 44,"

and nine actuating keys-carried by arms 45, are located in the same position as in the embodiment'of Fig. 1, the selector keys being.. at the typists right. In Fig. 4 one-of the selector keys and one of the actuating keys are sh'own to have j been depressed thereby causing one of the -types i to come linto contact with the paper-carrying roller'.

I' shall call writing members the nine members 46 that are caused to swing from their initial v position toward the paper-carrying roller by actu.

i ating keys' 45, and shall now describe their construction. Each o f said members (Figs. 8,'9, 10) j comprises a Ahollow' body 41 rotatably mounted on E spindle 48 which issupported by the frame of the -1 machine; said hollow body 41 is providedwith a Q -lever 49 operatively connected to an actuating Akey by a linkage mechanism 50, 5| (5I being pivotally mounted on bar 52 frame),.58, 54. l tor 55 is mounted'on 41 and carries 'nine types i arranged thereon at equal angular intervals as 3 shown in Fig. 4; pivot 56 of said sector 55 carries i small pulley A 51 within hollow body 41.- It is apparent that whenever the actuating key i is depressed, the linkage mechanism w'ill be supported by the cause to assume position'54a, 58a, 5|a, 50a,

' lever 49 will assume position 49a and the writing member 46 will be caused to swingtoward the paperfcarrying roller moving intothe writ- ,ing position shownin Fig. 4 whereinv one of the to 41 in sucha position that the rst type from the left would come into contact with the papercarrying roller whenever theactuating keys are depressed, provided therev be no change in the position of 55 relative to 41 during the movement of 4 6 vabout 48.. Supposing for instance that a amount, the following device is used.

sector 55 carriesI the letters, a, b, c, d, e, f. y, h, 7C,

arranged as shown in Fig. 4 the letter a would leave its impression on the paper. In order todetermine selectively the amount of motion of 6| relative to 60 and therefore the change in the position -of 55 relative to 41 by any desired Each of selector arms 44 is connected by link 64 to' one end of a lever 65 pivotally supported,

at 'a point'intermediate its ends, by one of uprights 66; the other end of said lever 65 engages a. cylindrical member 61 having a ban-61' r'otatably mounted therein, and this latterA carries a plate 69 which extends underneath all writing ing members 46. As 61 is vertically`slidablewithin its socket 68, the depression of the selector key will lift 61 together with 61' and 69 by a fixed Four of the members 61, barsv 61' and .plates Q69 (these latter identified as 69d, 69c2, 69h, 69a for a reason that will later' become apparent) A type-carrying member or sec- .may be seen in Fig. 4; however, itis understood.

that 'there' are required eight of each of such parts, operatively connected `to as many selector r varms and keys. y

l types carried by sector has come into contact with the paper.`

Parallel sectors sa, se, integrin with opposite 11Vfaces o f hollow member 41 and locatedin planes' perpendicular to the vaxis'of the paper-carryingv desired roller, cooperate to theselection of any ;ty pe'in a manner-to be described later.-

-1 Each member 4I has 'a sleeve 60 freely mounted onspindle and rotating with said member; 8l

valso carries small pulley 6| contained'within 4 1 u'and-eperatiLlLconnected -topulley 51 by wire 4168 so that-a'rotation o f'pulley '6 l ,c auses` pulley y 51 to rotate byan equal amount. 'Sleeve 6 0 andV Plates 69 are intended to 'cooperate with sectors 58, 59; therefore they are given such a heightthat, when lifted, they will be engaged by the front face 58a or'59a ofone of said sectors and caused'to rotate together 'with bar` 61', during the rotation of the writing members'46 about 48 due to the depression of the actuating keys,

'by a fixed-amount, as and for the purpose that will become hereafter apparent. Four' of these plates are to be engaged bysectors' 58' andfour by 'sectors 59;' for this purpose the sectors have different sizes and 'different angular positions,

as illustrated in. Figs "1 and 8 wherein58 is shown' comprised between 50 and 58".,"and 59'b'etween '59' and 59". It is'bO be IiOedillatvv plat/BS- 6 9' are givena maximum height, required for-cominto engagement with the Vaforementioned sectors, only in correspondence with` those of thev sectorseither 58 or 59, with which'theymust vcooperate...- The' remaining inoperative portion of the platesl has a-'reduced height;` particularly in correspondence withthose .ofthe sectors 58 or 59 with which the plates do not cooperate. Each writing member is capable of. cooperating with all the eight plates 69 by engaging them either with its sector 58 or its sector 59; the points of engagement have been distributed between two sectors for each member 46 in order to permit anyone of plates 69 to rotate Without interfering with the next plate while this latter able bent member 1.3 bears against extension 62;

pulleys 6I are therefore prevented from rotating with sleeves 6U about 48 and are caused to move relative to 68 thereby bringing about a change in the position of sectors 55 relative to hollow bodies 41 whenever writing members 46 are caused to rotate about 48. When members 46 return to their initial position, their extensions 62 will rotate together with them, and must be stopped as soon as 46 reach their initial position; stop 62' is provided for this purpose.

Should the mechanism described be held in its normal position during the complete motion of any given member 46, the last type on the typecarrying sector 55 pertaining to said member 46 would be caused to leave its impression on the paper, for instance the letter lc on the sector 55 that can be seen in its normal position in Fig. 4. Therefore it is apparent that only eight selector keys and cooperating means are needed, though a ninth inoperative key mayg' be advantageously added for uniformity of typing.

When, however, one of sectors 58, 59 engages with the front face 58a or 59a, during the motion of its Writing member 46, one .of plates 69 that has been lifted owing to the depression of a selector key, said plate will yield to the thrust exerted by the sector and rotate by a given amount, as it is carried by bar 61 which is rotatably mounted in 61; link 10 will move slotted member 1| to the position shown in full lines in Fig. 4, 14, 15 and 16 will concurrently cause swingable bent member 13 to assume the position also shown in full lines, extension 62 will be disengaged, pulley 6| will become free to rotate together with sleeve 6l), and no further change will take place in the position of 55 relative to 41.

It is therefore clear that the space which sectors 58, 59 must' travel before engaging their cooperating plates 69, determines the amount of displacement of 55 relative to 41, and therefore also determines which one of the types is moved into the proper position for coming into contact with the paper-carrying roller. It is also clear that by suitably arranging the position of plates 69 so as to cause each of sectors 58, 59 of each writing member 46 to engage the plates at four different points, angularly staggered by an amount equal to the angular distance between two successive types, all sectors 55 can be selectively caused to assume eight different positions with respect to 41, wherein eight different types will come into contact with the paper-carrying roller; the ninth type will be moved autofmatically into the proper'position for typing whenever the mechanism plates Bil- sectors 58, 59 remains inoperative.

In the example of Fig. 4, the four plates 68 face thereof.

are arranged to cooperate with sector 58 of the ywriting member shown in the writing position,

which has a sector 55 carrying the-letters A, B, C, D, E, F, G, H, K; the points of engagement of 58 with the four plates 69 are such as to allow of the selection of the letters A, B, C, D. The plate which allows of the selection of the letter C is shown as having been lifted and engaged by sector 58, and the letter C is being typed on the paper. y

Fig. 7 diagrammatically illustrates by Way of example the arrangement of the plates 69 and cooperating sectors 58, 59 with reference to a writing member 46 having a sector 55 that carries types a,v b, c, d, e, j, g, h, lc. The plates are shown in their normal position, in the position they would assume if lifted, and in the position to which they would be moved by the sectors 58, 59. During the motion of the writing member 46, sector 58 may move from its initial position 58-58" to the position shown in dotted lines and engage anyone of plates 69a, 69h, 69a, 69d that has been lifted, to cause the engaged plate to act on member 13 through the linkage mechanism 16, 1|, 12, 14, 15, 16, as hereinbefore described, to move said member 13 thereby releasing pulley 6| and selecting any one of the letters a, b, c, d; sector 59 may move from its initial position 59-59" to the position shown in dotted lines and engage vanyone of the remaining four plates that has been lifted, thereby selecting in a similar manner anyone of the letters e, f, g, h. the letter 1c being automatically selected whenever the mechanism plates-sectors remains inoperative.

Figs 5 and 6 also show means for a correct selection of the types even in casean inexperienced typist should abandon a selector key before the operation of the selector mechanism has been completed,

For this purpose there is provided a device which locks plates 69 in the position they have assumed after having been lifted and engaged by the cooperating sectors 58, 59, and permits them to return to their initial position only during the return motion of the writing members.

Bars 61 have secured thereto a rigid member 11 bent at a right angle; the lower portion of said member is hook-shaped and is lprovided with a horizontal stud 18 resiliently held therein by spring 19. Vertical spring 89, mounted on the base of 68, has a curved upper portion provided with a hook 8|. When 61 is lifted, the back face of the curved upper portion of spring 80 is urged against a stud 82 carried by 61, and 61, 61 and 69 are thereby securely locked in their upper position. As soon as plate 69 'is engaged by one of sectors 58, 59 and caused to rotate, the hookshaped portion of 11 is moved toward hook 8|; the I wedge-shaped tip cf stud 18 slides along the side of 8| and is caused to abut against the back Should'the typist abandon the selector key, lever 65 will be allowed to return to its initial position as stud 83 may slide within slot 84 in memlber 61, but this latter will remain lifted and the operation of the selector mechanism will not be affected.

During the return motion of the writing member, plate 69 will be disengaged and Vreturned by spring 16 through 13, 16, 15, 14, 1| and 10 to the position it had prior to its being engaged by the sector; therefore 61' will be caused to rotate, 11 will pull 8| backwardly, 80 will no longer be urged against 82, and 61 will be allowed to slide within 68 and to return to its initial lower position. 'l'Since 18 rotates about an upper center and 8l rotates aboutv a lower center, they will easily disengage from each other thereby allowing 'l1 to drop together with 61.

It will be understood that the foregoing description has been given merely by way of example, and that many changes may be given in the devices illustrated without. departing from the spirit of the invention or exceeding the scope of the claims. f

WhatI claim is:

1. Atypewriting machine comprising, .in combination, a paper-carrying roller, a plurality ci swingable members mounted on a stationary spindle and movable toward the paper-carrying roller, a pulley frictionally mounted within each of said swingable Amembersfor rotation about the stationary spindle and having an extension, stop means for normally engaging said extension to hold said pulley in an initial xed position, sectors carried by each of said swingable members. a type-carrying ymember rotatably mounted in each of said. swingable members and carryingAa plurality of types, means operatively interconnecting said type-carrying member with, said pulley whereby said type-carrying member is caused to rotate with respect to said swingable member during the motion of thisv latter toward the paper-carrying '-roller whenever said pulley is held in saidjnitial position, a rst set of keys, means actuated by said set of keys for selectively causing anyone of said swingable members to move toward 'the paper-carrying roller, a second setof keys, and means actuated by said second set of keys and cooperating with said sectorls for selectively disengaging said s'top means from said extension. to release said pulley atk any desired point during the.motion of its swingable member toward the paper-carrying roller, tc allow the pulley to be frictionally able member.

2. A typewriting machine comprising, in combination'. a paper-carrying roller, a plurality of type-carrying members, each of said members carrying a plurality of types and being movable driven by the swingpaper-carrying roller to cause said type-carrying member to effect the selective movement by anyl amount desired. v

3. A typewriting machine as in claim l, Wherein the means for selectively disengaging the stop .means from the extension, to release the pulley at any desired pointduring the motion of the type-carrying member toward the paper-carrying roller, comprise an element capable of engaging one of the sectors carried by the swingable member at a fixed point, and of being angularly displaced thereby by a fixed amount, vand means inplurality of types, an element frictionally lmounted in each swingable vmember for rotation about said stationary spindle', means operatively interconnecting said element and said type-carrying member', stop means for lnormally preventing rotation of said element on said spindle during Qmovementv of the swingable member to cause toward the paper-carrying roller, movable means for guiding each of said type-carrying members during the motion thereof 'toward the 'paper-carrying roller, said means being capable of causing the type-carrying, memberv to eilect another and `distinct movement whereby anyone of the types carried by said memberis selectively al.

lowed to leave its impression` on the paper, a first set of keys, means actuated by said set of keys for selectively causing anyone ofthe typecarrying members to move toward the papercarrying ro1ler,'a second set oi? keys, and means actuated by'said second set of keys and capable of engaging' selectively said guiding means at anyone of a number of fixed points during the motion of the type-carrying member toward the `prelleterltiilled points during angular displacement of the type-carrying member relative to the swingable member, a set of keys, means actuated by said set of keys for selectively moving anyone of\the swingable members toward the paper-carrying roller, a second set of keys, and means controlled by said sec;

ond 4`set ofkeys for rendering said stop means inoperative at any desired point during the movement of the swingable member thereby releas ing-said element to allow the same-to be frictionally driven by the swingable member and selectively determining the amount of angular displacement of the type-carrying member relative to the swingable member. A

5. A typewriting machine comprising a papercarrying roller, aplurality of type-carrying members, each of said members having a plurality of types and being movable toward the paper-carrying roller, means for supporting the type-carrying members for normal motion in a horizontal plane, a set of keys, means actuated by saidset .of keys for selectively causing anyone of the typecarrying members to move toward the'papercarrying roller, another set of keys, and means actuated by said set of keys for selectively causing the type-carrying member that is moved tov,

wardthe paper-.carrying roller to deviate from the horizontal plane at anyone of a number of its movement, thereby determining which one of the types will come into contact with the paper-carrying roller.

ACHILLE COLOMBO.

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