US 2408452 A
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' Oct. 1, 1946.r J. l.. sT'lxRuD sHoRTHAND TYPEWRI'HNGv MACHINE Filed Nov. a. 1945 3 sheets-'sheet 3 INVENTOR ffwf ATTORNEY Patented Get. l, 1946 UNITED STATES PATENT OFFICE 2,408,452 l sHoR'rHAND TYPEWRITING MACHINE John L. Stixrud, Los Angeles, Calif.
Application November 8, 1943, Serial No. 509,514
y vThis invention relates to typewriting machines and more particularly to shorthand typewriting machines by means of which the operator is able to type several letters or characters at a single stroke on the keyboard, and the primary purpose of which is to attain great speed in writing.
Among the objects. of theinvention are: To
'provide a new kind of iinger-depressible key which may be struck in such a way as to be tilted in a plurality .of diferent directions to imprint different type letters, thereby reducing the number of keys heretofore found necessary to provide for typing, for example, the Various letters of the English alphabet; to render the casing for containing the working parts of the minimum size considering the character of the typing mechanism contained therein; and to provide a simpliiiedmeans for mounting and controlling the operation of the aforesaid keys.
The invention inc1udes, among other novel features, an outstanding departure from the conventional arrangement of .typewriting 'machines in that the platen is placed on the side of the machine rather than facing the operator. Accordingly, the bars or rods for'actuating the printing mechanism are arranged so as to extend toward and from the platen. The keys and their supporting bars cross the printing bars at a right angle. By this novel arrangement a great many advantages and improvements over existing typewriting machines and shorthand typewriting machines are obtained;
In order to promote speedof operation a'shorthand machine should have asimple keyboard with a relatively small number .or` keys.v On the other hand it is desirable that thefrnac'hine include sufficient charactersto represent :all the sounds of the spoken language. In shorthand 'machines as hitherto constructed the keyboard has usually been either cumbersome due to a large number of keys, or else because of asystem With these keys the operator can type 45 lettersv or characters, which number is sufficient to 'write English without the use of codes. y.
While the primary object of the invention is to provide a shorthand machine, yet'o'ther uses are possible. For, asA the words and sentences printed by the ymachine can be understood by any average person, it is not necessary to retype a message on the typewriter if it is of an informal nature, such as an inter-department communication. If great urgency exists, for example, of a military nature, the paper strip can be torn off and dispatched and the contents can be easily readand understood by the recipient.
. Itv may happen during the operation of a shorthand machinethat the supply of paper becomes exhausted. It then becomes necessary to rell the paper container and rethread the paper strip around the platen and the associated rollers. It
Yis important that as little time as possible be lost in this operation. With these requirements in view it is an object of this invention to provide a simplified and otherwise improved arrangement of the structure to afford quicker access to the interior of the machine so that a new supply of paper can be more quickly put in place and speedily arranged for a continuance of the typing op.
Other objects, advantages and features of .inf vention will hereinafter appear.
Referring to the accompanying drawings, which illustrate what is at present deemed to .be a preferred embodiment of the invention,
Fig. 1 is a plan view of the complete machine.
Fig. 2 is a section on line 2-2 of Fig. 5.
Fig. 3 is a section on line 3-3 of Fig. 5.
Fig. 4 is a view showing the machine partly in side elevation and partly sectioned on irregular line 4-4 of Fig. 5, parts .being broken out to shorten the view.'
Fig. 5 is a view partlyin plan and partly in horizontal section on line 5,-5 of Fig. 4, parts being broken out to contract the view. e
Fig. 6` is a fragmental vertical section online 6-.6 of Fig. 5.
l Fig; 7 is a .fragmental View. or" Fig. 4 showing .the device in an 'open position ready to install the paper strip to be typed upon.
- Fig. `8 is a sectional View on line 8 8 of Fig, '7.
`Referring in detail to the drawings, the terms near and far as hereinafter used in describing the machine, refer to the same as Viewed in Figs. 1, 4 and 5.
The machine has a frame or housing portion I which is upwarly swingable in relation to its double base which consists of plates 2 and 3. The
lower of these .plates 3 ishinged on the near side .of the frame 4 and is held in position on the far side bythe lever 5 pivoting on the pin 6 on the arm 1 which is fastened to the base. The lower base plate 3 has an upstanding rack member 8 with a series of grooves 9 into which the 3 hammer head of the lever is held by the spring IB. The bottom of the machine is suitably cushioned.
Fastened to the base plate 2 is the paper container i2 into which is placed the folded paper strip I3 on which the printing is done. The end portion of the paper strip emerges (as indicated in Figs. 4 and 7) from the paper container I2. The guide roller I5, which pivots on the shaft I5 is fastened to they frame by means of the arms 58, is caused by a spring 59 to hold the paper strip close to the platen.
rfhe rubber roller i8, pivoted on the shaft I9 mounted on the frame I, serves Athe purpose of holding the paper strip against theplaten. The
shield and the paper guide 42 are both supported from the frame I in any suitable manner. The paper shield ll2 is serrated at lil to Vfacilitate tearing off the paper strip when desired.
The platen 4 pivots on the shaft 44a fastened to the brackets 43. On the neal` end of the platen is a ratchet wheel d5. The dog 46 is carried by thelpivoted layer 48. This lever swings upon the shaft |50; carried by bracket 43. One end of the barils is pivotally connected by means of a pin -55 to the lower arm d8a of the lever 48,., the opposite end of Said bar l being pivotally connected by-a pin 5i to the upper end of a swingable bar The adapter 52 serves to adjust the length of the bar de. The bar 53 pivots at its lower end on a pin 5 fastened to the bracket 43. The spring 55 holds the edge of thebar 53 against a stop 5S so that the end of said bar G9 is just in front Aof the arm 5l, which is part of the spacing `mechanism of the machine to be explained later. -Whenthe arm v5l moves towards the right (Fig. 4), it pushes Vthe arm -ll toward the right causing the dog-l5 -to move away from the ratchet wheel one-notch. When the arm 5l returns to neutral position the spring 55 will cause the lever `I3 to return to its neutral position, thus causing the dog '15 to move forward and turn the platen one notch thus spacing the printed writing.
YIt will be noticed from the above description that the paper container, platen, spacing mechanisrn and a shield '42a are fastened to the base Aof the'machine and that all other parts are fastened to its frame I, the frame I being hinged at the extreme left (see Figs. k4 and 7), to the base at 23. Said frame and top and side covers are deta'chably connected by the clasp `6| Yat the extreme right, and the top and side Acover is connected to the base by a similar clasp 62 at the far side-of frame l. By releasing the claspSI the top and side cover carrying with it the frame I can be lifted up lid fashion exposing the paper container and the platen which are fastened to -vof the paper strip pulled over the platen, and by closing the machine, the guide rollers and the paper shield will be caused to fall into their proper places, the machine then being refilled and ready for further operation.
-If it is desired to inspect or adjust the printing assembly 65 or other parts of the mechanism fastened to the frame, the top and side cover can be lifted after the clamps 6I and 62 have been released. Then the top and side cover can be raised but the frame will remain in position. Apertures 2li and 2da are provided around the keys to permit the removal of the ktop and side cover when they are disconnected from the enclosed frame. To protect the internal mechamsm and improve the appearance of the machine,
' be explained later.
top plates 63 and S4 are provided to cover the parts underneath the keys.
The keyboard has three rows of keys 1li, II and l2. As the keys in each row act alike the description of one key assembly in each row will suffice. The key plate having marked upon it DF in row 7i) is supported by the shoulder '|3 of the angular key bar 'I4 which extends downward on the far side of the chassis and is held in place by the groove 'l5 (seeFig. 5) in the edge of the top plate 63. The upper guide bar 'I6 extends the length of the keyboard, is fastened to the top plate 53 and penetrates the key bar "'M through-the slot TI. key barv is held in place by the lower edge of the frame l5 which is bent at right angle at this The lower guide bar 'i9 extending the length Vof the keyboard, is fastened to the frame edge "iii and penetrates the slot in the key bar ld. The spring 8| fastened to the tongue S2 (see Fig. 2) and to the guide bar "'lS returns the angle bar to normal position after vbeing depressed. The Ykey plate '83 has lugs 84 and 85 extending downward. These lugs have bearing apertures 8G and Si'. The shoulder i3 carries pins penetratingl the apertures 86 and 81 of the lugs 84 and 85 respectively, permitting the keyplate to pivot laround these pins so that the key plates can be tipped to the right or to the vleft if touched off center by the operator. The apertured stop lugs 8E fastened to the key plate'l3'limits this tipping. The spring 89 fastened to the lower end of the lug andthe arm 90 lprotruding from the key bar l@ keeps the key plate 83 in its horizontal position when not operated. The angle iron 9| running the length of the keyboard has a cushion of felt or similar material 92 fastened to it and acts as a stop for the bar 'i4 by contact with the arm The angle iron 9| is fastened to the frame and 'is adjustable. y
The keys in row 'l2 are three in number and are actuated by the thumbs of the operator. For convenience of operation they are vplaced lower than the rows "Hl and 'II and their arrangement differs' to a certain extent. The T-shaped arm or key bar 94 has an arm 95 extending toward the center of the machine the purpose of which will The key plate 96 pivots at 'S7 andv98, `the pivoting .and stop arrangement being the same as described for the keys in rows lil and The arm 94 is held in place by an aperture in the bottom plate |110, said plate being fastened to and extending from the frame of the machine and beingconnected by an end plate Il. The felt lpad |52 fastened on the underside of the top plate '6d serves as a stop after the arm 94 has vbeen depressed, to limit the upward movement of said arm by engaging the extension thereof. The spring |03 fastened'to the connection Ia and the L-shaped arm Mi acts as 'a return spring. The spring |65 leading from the lower part of the pivot member 97 to the L- Yshaped arm |01 keeps the key .plate 95 in its horizontal position when not operated.
Running substantially the lengthof the machine from the platenyto the opposite end of the machine is a plurality of strap like bars I IB Vheld in upright position as to their breadth by the spacer plates I II and II'2 and supported on the left by the gear segments H3 and IM. which mesh with the bars. The springs I|5 and IIB hold the ends of the bars against the stop I Il which consists of an angle bar II8 and a cushion. The angle b ar IIS has screws in a slot IIS (see Fig. 4) for adjustments. At the right 0f the machine the The lower part of the "bars l rest on theguide pin |20 extending across Aextending upward and slightly bent laterally at the point |23 so that the right end portion of ,said arm isdirectly over the arm of the coacting bar |24.V These arms have rack portions at the right end and between them is the `floating gear |25 forming a concentric, laterally extending part of the printing wheel |26 held in an upright position by the spacer plates I||. On theright hand portion of the periphery of the printing wheel and facing the platen are four circumferentially spaced apart letters or characters |3I, |32, |33 and |34. When the floating gear is in its normal position two of these characters are located above the axis of the wheel and the other two therebelow. Y,
Meshing with the far side bar of the coacting pair of bars is a gear segment |21 fixed to the shaft |40 which rotates in the bearing holes l40a. Meshing with the near side bar of the coacting pair is a. gear |28 xed tothe hollow shaft |42 which pivots on the shaft |40. l'Directly above these gears and extending downward from the apertured stop lug 88 is an integral finger |29. The thickness of this finger is equal to the combined thickness of the two coacting gears |21 and |28. When in normal position said nger |29 is immediatelyabove the middle point |30. When the operator touches the key plate 83 a little to the right of the center the finger |29 moves to the left to the point or shoulder |3I. As the key 83 is thereupon depressed the `iinger |29 moves downward at this point and depresses the selected gear |21 causing the far side of the coacting bar H0 to move to the right. The arm |22 of said bar moving to the right acts on the upper edge of the gear |25 causing it to start a rolling motion in a clockwise direction until the finger |29 has depressed the gear |21, till its upper edge has reached the level of the upper edge of gear |28. At this point of the operation the printing Wheel has-turned clockwise so that the letter or character at |3| has reached the printing line, that is to say isdirected horizontally and faces the platen. As the key 88 continues its downward motion both gears |21 and |28 are depressed and the connected coacting bars are pushed to the right at the saine speed, causing the rolling motion of the printing wheel to be replaced by a side motion vuntil the letter or character contacts the platen and the printing of that particular letter or char-Y acter results. Y
If the operator touches the key plate a little to the left of the center the finger |29 will move t0 the right until it reaches the point |35. In this positionthe gear |21 will travel a longer distance before the nger |29 reaches the upper edge of gear |28. As a resultthe far side bar ||0 which meshes with gear |21 will travel farther toward the right causing `the clockwise rolling motion of the printing wheel |25 to be more extended so that by the time the linger |29* reaches the upper edge of the gear the letter V|3| has moved downward till itis in the printing line. By the continued downward motion of the finger |29, now acting on the upper edge of both gears |21 and |28, these gears will cause.
both the associated coating bars to move to the right at the sameY speed. The clockwise motion of thel printing wheel will thus stop and will be replaced by a side motion until the letter oon- The varms the near ends ofthe shafts |53 and |54. Hinged 6 tacts the platen and the printing of this particularletter results.
.'As will be seen from this description the key vplates in row ,10 as represented by the key plate .DF cause either one of the two upper letters vonthe Yprinting wheel to be printed accordingv tohow the key.plate-DF is being tipped, either to: the right or the left, as the key is being de- -pressed..
The two lower letters on the printing wheels |33 and |34 are similarly actuated by the key plates in row as represented by the key BS. Fixed tothe` shaft |40 is the arm |43 and xed to the .hollowv shaft |42 is'the arn |44. The upper edges downward it first moves the near side bar ||0 causing the arm |24 t0 move to the right turning the lower edge of the gear |25 forward creating a counterclockwise 'motion causing the letter at |33 or the letter at |34 on the printing wheel to lmove into the printing line accordingy to whether the key plate BS is being tipped to the right or to the left.
The two keys DF and BS together control the four letters on the printing wheel facing the platen kon the extreme far side of the machine. Similarly the pair of key plates PK and TG control the four letters on the second printing wheel counting from the far side of the machine. The key plates MC and VW control the third printing wheel, and so on, until the pair of key yplates 'I: and SJ on the extreme right control the printing wheel nearest the operator.
It will be noted that the keys are marked on the drawings for explanatory purposes only. The ,keys on the machine representing said type will be blank.
The keys *ofl a third row 'l2 are actuated by ithe thumbs and are used to print the vowels. Each key actuates its separate printing wheel `which has only two letters or characters. The
f bars and thev printing wheels connected with rthese keys are in the center of the bar and printing wheel arrangement ||0. Fixed to the shaft |53y is a gear |45 and xed to the hollow shaft |54 isa gear |46. The shafts |53 and |54 extend l*beyond the side of the frame through anv aperturei.- The shaft |53 rotates aty suitable bearing holes |4| and |48, the latter in an aux- Qiliary plate |49 attached to the side of the frame.
|50 and |5| are xed respectively too onthe arml 95'and extending upward is a finger |55, the top of which extends above the upper edge of -thearms |50 and |5|, the L-shaped extension |56 of which protrudes above the arms |50-and |5|. 'Iheiinger |55 is kept in upright position by the-forkshaped end of the L-shaped arm |51` which is fastened tothe far side of the .key plate 95. When thekey plate 901s tipped to the right the arm |51 will cause the nger |55 to move to the left directly over` the arm |5| and when continuing the downward movement of the key assembly 96 the arm |5| and shaft1|54 will cause the gear |45 to move the near side horizontal bar v|||| toward' the right causing the letter in position |33 on the printing wheel to move Aintothe,printing line.4 'The continued downward vlish language.
"7 stroke will then also move the 'arm |50, .the shaft |53 and gear |45 thereby causing simultaneous 'movement of both-gears which moves the-printing wheel into contact with'the platen. When the key plate 'S6 is tpped'tor-the le'ft the"ari`r1 l''5'l will cause the 'finger |55 tomove to the'right directly -over'thefarm 1| t'ilactuatingfrst the fbar at the'far side of the coactingbars Hf'and causing the printing wheel to bring the related letter in position into vthe printing line and -subs'ecniently incontact with the platen.
The arrangement of each key assembly ofe'ach row is similar except the key which -prints the numeral 4 and serves 'as a yspace key. The arrangement oi this key is'th'ere'fore different. IThe gears l2? and |28 are the `same as for the other keys but the arms |58 and |59 are shorter than the arms M3 and |44 `serving the other keys ibecause only one character, the Anumeral 4 is to be printed. It is desired that no printing takes place when the key l (and space) is touched Son the right side (the space side) Vbut it is necessary that a bar -be then 'moved sideways the same as is the case with the bars Il!! in order that the spacing device will be actuated. An additional gear |63 (see Fig. -5) -is therefore provided which is engaged by the finger |29 underneath the plate 4 (and space) and the width of this iinger is extended to cover three thicknesses-of the gears to accommodate this additional `gear in addition to the arms |58 and |59. The gear t6 meshes with a bar lilla which is cut ofi 'shortly beyond the slot `|2| and the guide pin |29 so as not to interfere with the printing wheels.
'Extending through the slot |`2| of all the bars v| lil is a floating shaft |65. The near end of this shaft is connected with one vend of the arm |65 the other end of said arm being pivotally connected at |61? to the aforesaid arm 57|. When any of the bars im, including the spacing bar, move to the right the shaft it will be pushed toward 'the right and move the bar |66 inthe same direction thereby actuating the spacing device at* tached to the platen as has already 4been described, and also operating the inking device 65.
The arrangement of letters and characters on the printing mechanism is capable of many variations. As'the keys which appear opposite each other in row it and 'H act in pairs sharing one printing wheel, only one of the four letters or characters indicated on each pair of same Ycan be printed at any one time. In making this arrangement of the letters and characters of the vkey board care has been taken that letters attached to anyone printing wheel do notas arule appear together in words or syllables of the Eng- A high degree of similarity in appearance exists between letters and numerals making it possible to use rsome 'of the letters as substitute for rnumerals and vice versa. Thus I will 'be used to express the numeral y1, the numeral 2 'will be used to express the letter "Z, the initial letter S will be used to express the numeral 5, and G to express the numeral 6. rihe numeral 7 will be used to express the the letter 2, while the numeral 9 will express the letter Q When so used even the uninitiated will have no di'fculty in understanding their meaning. 'When writing vowels the `is used to indicate the pronunciationof the vowels to ma-ke phonetic expression easier; thus long O, A, I and U are 'preceded bythe 'Long E is written EA. Thus hod 'and hood fare written letters ""I and kLT and the numeral 8 to express -HOD and IfI-OD; iar and `fare arewritten "FARA "andIF-AR; bit' 'andbite are Written iBIT and B-IT and dud :and dude are writtenDUD and D-UD.
The vcharacter z vat the extreme right key is used to indicate that a vowel at 'theend of'a word is omitted. Thus 'ready `is written READz. Handy 'is written HANDz. This character can also, :if fd'esired, be used to rexpress long vowels, thus yfare, bite and dude can be written FAR; ']3I"1":V and DUD z..
1I claim: f
`1. In amachine of the kind described, a support, two Vbars mounted thereon in 'a generally adjacent .parallel vrelation to each other, each of `said .bars having an end portion furnished along one iside with `a lseries of vgear teeth, said two 'fseries of ftee'th rb'ein'g Adirected toward I each other with va rspace between them, a'floating gear occupying said space .and 'in mesh with both -of said series of teeth, a plurality of 'type vcharacters circuiriferentially spaced along a pe'ripheral -portion of said gear, .a 'manually vdepressible v key mounted Von said support, said key being 'initially adjustfable fto las'su'me either` Soi two `positions preparatory Ito its `depression, and means operatively connecting said key with both of -said bars to impart to them a longitudinal Ymovement when depressed, one of said bars being moved 'during the entire downward movement fof vsaid Akey and the other of said bars being movedfo'nly duri-ng a greater or lesserpa'rt of thenal portion of the downward movement of said key, the extent of the movement ofthe latter Ibar depending upon the aforesaid initialladjustment of Isai'd key, and a platen mounted upon saidsup'portinto a printing relation with which one oi'the 'type characters of said gear is brought at I'the end of the sliding movement'of fsaid bar's laftersaiol :key has been initially ladjusted in one positio'mano'ther of the type characters of said gear being contacte'd with said platen after said key yis adjusted inthe other of its initial positions.
2. The `subject matter -of claim 1 and, means whereby said bars and key are automatically -returned to their original positions after-the opera- "ti'o'n -of said key.
3. In a machine of the vkind described, vin combination, a support, a depressible vkey bar mounted thereon, a key provided with a downwardly directed finger, vsaid 'key being tiltably mounted 'swings when said 'key is depressed 'after being swung to one tilted position, said 'arm being contacted -by said ringer vat 'a different 'distance from its axis of swing when said key is "depressed 'after being tilted to another position, a plurality of type characters operatively conlnected with vsaid swinga'ble "arm, the aforesaid variable swinging of Vsaid arm serving to select the predetermined character lto be typed, and means mounted on said support to automatically restore 'theo'perating 'parts 'to their original positions after typing operations. y
4. The subject matter of claim 3 and said arm having a side portion furnished with two shoulders atdiiierent distances from the axis about vwhich the arm swings, said 'finger contacting with erial surface thereof, a selectively Vpresented and the movement n vnally other being moved only a iloating-type-carrying wheel to cooperate with .said platen, said wheel having gear teeth andv a 1 plurality of circumferentially spaced apart type ment of said key depending upon the initial tilty Y ingy thereof, and typing means operatively conmeshes with one side of said type wheel and the other with l the opposite side thereof, vkey operated means mounted on said support whereby one of said bars is longitudinally moved a predetermined distance toward the platen and then the other 'l bar is caused to move with it and at the same rate of speed until a selected type of the plurality on said floating wheel is caused to print a character upon a sheet of paper overlying said platen,
6. In a machine of the kind described, in combination, a rotary typing wheel having a plurality of type characters spaced on the periphactuated tiltable operating key to perform a selecting operation by its own movement in one of two directions, a pair of longitudinally movablebars operatively connecting the operatingkey with the typing wheel, the movement of one of said bars by the initial portion of the depression of said key during one selectivev tilting selecting the type to be by the full depression of said key during said one selective tilting moving the typing wheel into printing position in accordance with the selective movement of the operating key, and intervening mechanism operatively yconnecting said typing wheel, movable bars and operating key to carry out a printing operation.
'7. In a machine of the kind described, in combination, a rotary type' wheel having a plurality of type characters thereon, a pair of longitudislidable bars, each of said bars being operatively connected to said type wheeLa platen, a typing key, means operatively connecting said slidable bars and said typing key, said typing key being adapted to be tilted to engage, through the medium of saidV means, one bars and to actuate the sameupon initial de,- pression to select the desired type character von said wheel, said key upon further depression actuating both of said slidable bars, through the medium ofy said means, to bodily move the type wheel with the selected character thereon into printing( engagement with theplaten.
8, In a machine of the kind described, in combination, a support, a depressible kkey bar mounted thereon which when released automatically returns to its original position, a key mounted on said bar to tilt from one to the other of either of two positions preparatory to being manually depressed together with said bar, said key having a downwardly directed finger, two members movably mounted upon said support in the path taken by said finger when said key is depressed, one of said members being moved during the entire operative downward movement of the key and the duringA a greater orA lesser part of the nal portion of the downward moveand means vto automatically restore the; operating parts to their original positions after of both of said bars Y of said slidable nected with said membersand including two type one or the other of which is selectively positioned for a printing operation by the initial movement of the full stroke member and subsequently moved into printing position by the 'combined movements of both members.
9. In a machine of the kind described, in combination, a support, a depressible key bar mounted thereon which when released automatically returns to its original position, a key Vmounted on' said bar to tilt from one to the other of either of -ftwo positionspreparatory to being manually depressed togetner with said bar, two members movably mounted upon said support in the path of said key, one of said members being moved during the entireoperative downward movement of said key and the other being moved only during a greater or lesser part of the final portion of the downward movement of said key depending upon the initial tilting thereof, and typing means mounted upon said support and operatively connected with said members, said typing means including two type one or the other of which is selectively positioned for a printing operationA by 'the vmovement of one of said movable members and .subsequently moved into printing position by the combined movement oi both of said members.
10. In a machine of the kind described, in combination, a support, a depressible key bar mounted thereon which when released automatically returns to its original position, a key mounted on said bar to tilt from one tothe other of either 1 of two positions preparatory to being manually `relation to the axis about which said gear segments turn, thereby varying ythe amount of the turning movement imparted to said gear segments by each complete depression of said key, typing mechanism mounted upon said support and comprising two type characters, a platen in cooperative relation to said type characters, operative means between said gear segments and said type characters whereby one of said type characters is directed toward said platen by a full depression of the aforesaid key when tilted to one position and the other of said type. characters is directed toward said platen byy a full depression of said key when tilted to its otherposition, and
means whereby said key bar, gear segments and typing mechanism are automatically restored to normal position after each printing operation.
11. The subject matter of claim 10 and, oneof said gear segments having an edge portion furnished with two shoulders at different distances from the axis about which such gear segment turns, said finger contacting with one of said 'shoulders in one tilted position of the key and with u the other shoulder in the other tilted position thereof. l
JOHN L. STIXRUD.