US903517A - Type-writing machine. - Google Patents

Description

B. G. STIGKNEY. TYPE WRITING MACHINE,

APPLICATION IFILED OCT. l4, 1903. I 903,51 '7. Patented Nov; 10, 1908.

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l3, ATTORNEY B. G. STIOKNEY. TYPE WRITING MACHINE. APPLICATION FILED 00w. 14, 1903.

Patented Nov. 10, 1908 a SHEETS-SHEET 2 TNEEEEEE= TUHNE B. 0. STIGKNEYL I TYPE WRITING MACHINE.

'APPLIOATION FILED OUT. 14, 1903.

Patented Nov. 10, 1908.

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INVENTUH \A/WNEEEEa H15, TTURNELY UNITED STATES PATENT onrion.

BURN-HAM O. STICKNEY, OF ELIZABETH, NEW J ER SEY, ASSIGNOR TO UNION TYPEWRITER GOHPANY, OF JERSEY CITY, NEW JERSEY, A' CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

I No. 903,517.

Specification of Letters Patent.

Patented Nov. 10, mos.

Application filed October 14, 1903. Serial No. 177,002.

' dent of Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Im rovements in Type- Writing Machines, of which the following is a specification.

This invention relates ,to the type actions of writing machines of the front strike class, and its object is to provide simple and effective connections between the keys and the -type,bars, such that the leverage of the keys upon "the type bars is automatically decreased durin the )rinting stroke, so as to cushion the b ow oi the finger at both beginning and end of the key movement, and also to insure a powerful blow of. the type.

In the accompanying drawings, Figure 1,

is a longitudinal vertical section taken about centrally of one form of front strike writingv machines made in accordance with my present improvements; one type action being shown in normal position and one in printing position. v Fig. 2 is a front vertical section taken about on the line :rmof Fig. 1. Fig. 3 is a view similar to Fig. ,1 but showing another form of connection between the key andty ebar.

' In t 1e several views, like signs identify like parts. In the base 1 of the machine frame, which also comprises corner posts 2 and a top plate 3, are mounted horizontal key levers 4 of the first order, bearing keys 5; said levers being fulcrumed between their ends .upon a horizontal fulcrum rod 6, and being'provided with returning springs 7. i

Over the rear ends of the key levers is mounted a system of bell cranks or elbow levers, comprising upright arms 8 and for- -wardly extending arms 9; said elbow levers being fulcru'med'upon a horizontal rod, 10, and the arms 8 being connected by forwardly extending links 11 to type bars 12. The latter aremounted upon a curved fulcrum rod 13, strike rearwardly against a platen 14, and are rovided with returning s rings 15. The el ow-lever arms'Q extendfi'om their ivots towards the pivotal su ort 6 of the ey levers, and the rear arms 0 iilie key levers extend from the rod 6 towardsthe rod 10; the arms in each set terminating between the rods. Each of the arms 9 of the elbow levers is formed upon its underside with a curved tread 16 adapted to contact with and roll along the upper edge of the rear arm of its associated key lever 4, during the printing stroke, beginning at a point at the forward end of the arm 9, as indicated in fulllines, and ending at a point at the rear end of the key lever, as indicated in dotted lines. The point of contact gradually shifts rearwardly between the two fulcrums 6 and 10, whereby the leverage of the key "lever u on theelbow lever is radu-ally but materia y diminished during i316 printing stroke-of the type bar. The latter is caused to startslowly into action, and finishes with an accelerated moveent, while the blow of the finger upon the icy is eased both upon initialcontact with stroke.

It will be seen that the mounting of the type action is very compact, the key levers extending rearwardly beneath the type bars, and the sub-levers not only cooperating with the key levers to ease the finger actionybut also serving to transmute the up and down key lever movement into a forward and back action adapted to actuate the rearwardly striking type bars. The upstanding arms 8 of the elbow levers are of graduated heights, being shortest in'the middle of the system and of gradually-increasing height from the middle to the sides of the system, to agree with the positions of the type bars, which are mounted in a curved bar or segment 17. The arms 9 of the elbow levers are of such relative proportions as to cause the dip of the keys to be substantially uniform. While in some cases the key lever springs may be omitted, still I prefer to use t em in connection with the type bar springs, as tending to produce a more uniform tension of the keys than would be the case if the type bar springs alone were depended upon.

The ty e bar segment is perferably mounted to slidb'vertically between guides 18, to enable upper case types to print; and the links 11 swing idly about their points of connection to the arms ,8 during themovements of the segment.

Referring now to Fi 3,, the key levers,

the key and also at the completion of the key designated as 19, are ormed at their rear ends with icurved treads at 20, which extend about at' rightg anglesto the length of the levers. These treads are ada ted to roll down along the front edges 0 upstanding levers 21, which are connected by links 11 to the type bars. The action of the key lever is similar to that of an elbow lever, and

the effect of the rolling movement is the same as in the construction shown at Fig. 1.

Other variations may be resorted to with in the scope of myinvention, and portions of my improvements, may be used without others. v

What I claim as by Letters Patent,.is':'x-

a 1. In a front strike writing machine, the

combination with a series of rearwardly striking ty e bars, of a series of upstanding sub-levers in rear of the type bars and connected thereto, and a series ofkey bearing levers of the first order extending beneath the type bars and having rolling contact with the sub-levers. i

2. In a front strike writing machine, the combination with a series of rearwardly strikin type bars, of a series of key levers of the list order, and a series of elbow levers compgising arms extending lon itudinally of the ey levers and having r0 ling contact therewith, and also com rising upstanding arms which are connecte to the ty e bars.

, 3. In a front strike writing maciiine, the combination with a series of rearwardly strikingtypebars, of a series of key levers of the first order extending rearwardly bee neath the type bars; a series of elbow levers having both forwardly extending arms,

which have rolling contact with the key levers, and also upwardly extending arms;

and links extending forwardly from the latter to the type bars.

4. In a front strike writing machine, the, ;combinat1on with a series of rearwardly striking type bars, of a series of key levers of the first order, and a series of elbow levers com rising arms extending lon itudinally of theey levers and having r0 ling contact therewith, and also com risin upstanding arms which are connects to t e type bars;

len ths, shortestat the midd an of gradually increasing lengths from the said upstanding arms being of raduated e of t e system middle to the sides of the system, to agree with the positions of the type bars.

5. Ina front strike writing machine, the

new and desire to SGQIIIQ all increasing length from the middle to the si es 'oi the system, to agree with the positions of the type bars.

6.--The combination with altype bar of a key lever of the first order and a sub-lever;

the latter'bein .operatively connected to the 3pc bar and aving an arm which extends ong'an arm of the key lever, and rolls thereon; each of said rolling arms extending from its own pivot towards the pivot of the other arm but terminating between the pivots.

i "7. The combination with a type bar of a key lever'and a siib-lever the latter'bein o eratively connectedto the type bar and av ing an arm which extends along an arm of thekey lever, and rolls thereon; each of said rolling arms extending from its own pivot to,-

wards the pivot of the other arm but termi nating between the pivots; said key lever being of the first order and extendin rearwardly from the keyboard, and said subever having an upwardly extending arm which is. connected to said type bar.

8. The combination with a ty e bar of a lever of the first order connecte thereto; a key lever; said levers being mounted and formed for rolling contact; a spring for returning the type bar to normal position; and an independent spring for returning said key lever to normal position. q;

9. In a front strike writing machipe, the combination with a series of rearwardly striking type bars, of a series of ke levers of the first order extending rearward y beneath the type bars, aseries of elbow levers having forwardly extending arms which override the rear arms of the key levers and which also have curved treads, said elbow levers also having upwardly extending arms, and links connecting the latter tothe type bars.

10. In a front strike writing machine, the combination with a series of rearwardly strikingtype bars, of a series of ke levers of the first order extending rearward y beneath the type bars, a series of elbow levers having forwardly extending arms which overridethe rear arms of the key levers and which also have curved treads, said elbow levers also having upwardlyextending arms, links connecting the latter-to the type bars, returning sprins connected to said type bars, and returning sprin s for said key levers. I

11. In a fron strike writing machine, the combination with a series of rearwardly striking type bars, of a series of ke levers of the first orderextending rearward y'beneath the type bars, a series of elbow levers having forwardly extending arms which override the rear arms of the key'levers and which also have curved treads, said elbow. levers also having u wardly extending arms, links connecting t e latter to the type bars, returning springs connected to said type bars, returning sprin s for said key levers, and means for shifting t e said type bars to enable erent types to print; said upwardly extending arms being of graduated lengths to agree with the positions of the type bars. 1

12. In a front strike writing machine, the combination with a series of rearwardly striking type bars, of a series of key levers of the first order extending rearwardly beneath the type bars, a series of elbow levers having forwardly extending arms which override the rear arms of the key levers and which also have curved treads, said elbow levers also having upwardly extending arms, and links connecting the latter to the type bars; said rolling arms being respectively of such lengths and proportions as to enable the dip of the keys to be substantially uniform.

13. The combination with a series of rear-- wardly striking type bars, of a series of key levers beneath the same, a series of elbow levers mounted in rear of and above the key levers and having upwardly extending arms and also having forwardly extending arms; links connecting said upwardly extending arms to the type bars, said key levers beinglevers of the rst order and operating directly on said forwardly extending arms between the fulcra of the key levers and the fulcra of the elbow levers.

14. The combination with a series of rearwardly striking type bars, of a series of elbow levers mounted in rear thereof and mounted upon a transverse fulcrum rod and having upwardly extending arms connected to the type bars and also having forwardly extending arms; and a series of key levers of the first order mounted upon atransverse fulcrum rod extending beneath the type bars and adapted to contact with and actuate saidforwardly extending arms, the contacting arms being of such relative proportions as to cause the dip of the keys to be substantially uniform.

15. In a typewriting machine, the combinationof a series of upwardly and rearwardly striking typebars, a series of key levers, a series of upright sub-levers-pivoted on fixed pivots in the rear of the type bars and extending to different heights, and forwardly extending links from said sub-levers to the type bars, each sub-lever having a rolling engagement with its associated key lever, 1 the parts being proportioned so that the rolling engagement between the key lever and sub-lever is such that a uniform dip of the various key levers is provided.

16. In a typewriting machine, the combimum of a series of upwardly and rear wardly strikin type bars, a series, of key levers, a series 0 upright sub-levers pivoted on afixed pivot in the rear of the type bars and extending to progressively greater heights from the center to the sides of the system, 'a forwardly extending link from each sub-lever to the associated ty e bar, one of each of the sub-lever and key ever elements" having a cam surface for; cooperating and rolling engagement with the other of said elements, the parts being proportioned so that the rolling engagement between the various key levers and sub-levers is such that a uniform dip of the key levers throughout the system is provided. V

17.. In a typewriting machine, the combination of an upwardly and rearwardly striking type bar,-a keylever having a cam, and an upright sub-lever pivoted on a fixed pivot in the rear of the type bar andhaid sub-lever cooperating with the cam .on said key lever.

1.8. In a typewriting machine, the combination of a series of upwardly and rearwardly striking type bars, a series of upright sub-levers which are movable on fixed pivots and extend to different heights, links connecting said type bars and sub-levers, one of eachof said sub-lever and key-lever elements having a cam which-cooperates with the other of said elements, the arrangement bein such that the engagement between the key lever and sub-lever shall be nearest to stroke, the parts being proportioned so that the rolling engagement between the various key levers and sub-levers is such that a uniform dip of. the key levers throughout the system is provided.

19. In a typewriting machine, the .combination of a series of type bars, a series of up right sub-levers for said type bars, said sublevers extending different heights from the center to the sides of thesystem, and a series of key levers cooperating directly with said sub-levers, the arrangement of the parts and the contacting surfaces between the key levers and sub-levers being of such relative pro ortions as to cause the dip of the keys to e substantially uniform throughout the system and to effect a varying leverage during the'key depressions.

20. In a typewriting machine, a type-bar arranged to swing upwardly and rearwardly, an upright auxiliary lever operatively connected with the type-bar, and a bell-crank key lever having a vertical rolling contact with the auxiliary lever.

21'. In a typewriting machine, a type-bar arranged to, swing upwardly and rearwardly, an upright auxiliary lever operatively connected to the type-bar, and a substantially horizontal ke lever having an upright rocking face in irect rolling contact with the auxiliary lever.

connected to the tylpe-bar at its upper end, and adpivoted keyever vhaving an upright part a jacent its pivot indirect contact with the upright part of the auxiliary lever, and

acting to gradually shift the contact point between the two levers from a position near thekey-lever pivot to a position near the. auxiliary lever pivot as the key-lever is depressed. v

23.1111. a typewriting machine, a type-bar [arranged to swing upwardly and rearwardly,

a'pivot ed upright auxiliary lever operativeliy 7 connected to the tylpe-bar at its upper en and a pivoted keyever having an upright part in-ldirect changeable contact with the upright' ipart of the auxiliary lever,--one of said-,cont'aeting parts being curved and acting to cause the movement of either lever to be transmitted to the other with an accelerated motion.

24. In a typewriting machine, a type-bar arranged to swing upwardly and rearwardly, an upright angular auxiliary lever pivotally supported at Its lower end and operativel connected to the type-bar at its upper en and a key-lever pivotally supported at its rear end havin I an u ri ht art in direct conb i tact with the front side of t e auxiliary lever and acting to vibrate the auxiliar lever from its normal position with an acce crating motion.

25. In a typewriting machine, a type-bar arranged to swing upwardly and rearwardly, a pivoted upri ht auxiliary lever operative (y connected to the type-bar at its upper en and a rearwardly extending key-lever pivotally supported at its rear end having an u right part in direct rolling contact with tl ie auxiliary lever and acting with the down- Ward movement of the front end of the keylever to swing the uppler end of the auxiliary lever rearwardly Wlt tion. v

26. In a typewritin'g machine, a type-bar arranged to swing upwardly and rearwardly, an upright. pivoted angular auxiliary lever operatively connected to the type-bar at its an" accelerating moupper" end, and an angular horlzontal key lever pivotally supported at its rear end and having a rocking connection with the'auxiliary lever, the angular'part of one'leverworking within the other to, cause both levers to return to normal position at the same time.

27. In a typewriting machine, a type-bar- State of New York, this 12th day of October A. D. 1903. I

BURNHAM o. STIOKNEY.

Witnesses:

I E. M. WELLS, v

M. Fl HANNWEBER.

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