US855144A - Type-writing machine. - Google Patents

Description

PATENTED MAY 28, 1907. B. G. STIGKNEY.

TYPE WRITING MACHINE.

APPLICATION FILED 00114. 1903.

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' 14:5 T'TUHNEY UNITED STATES PATENT. OFFICE.

. BURNHAMo. s'rIoK EY, ELIZABETH, NEw JERSEY, ASSIGNOR To UNION TYPEWRITER COMPANY,"0F JERSEY- CITY. NEW JERSEY, A CORPORA- TION OF NEW JERSEY. I

TY E-WRITING MAQHINE.

l o all whom it may concern:

Beit known that I, BURNHAM C. STICKNEY,

, a citizen of the United States, and a resident of-Elizabeth, in the county ,of Union and State of New Jersey, have invented certain new and useful" Improvements in Type-,

"Writing Machines, of which thefollowing is aspecification.

, This invention relates toty'pe bar machines, and particularly those of the front strike variety, and its object is to provide improved means for so connecting the keys to the. tgpe bars as to diminish the leverage.

of the ormer upon the latter duringthe printing strokes, thereby to cushion the key strokes and improve the type impressions,

FInthe drawings forming part 01' this speci fication, Figure 1 is a central longitudinal v sectional view of a front strike writing machine made in accordance with my present im rovements; onetype action being shown n lines in normal pos1t1on, and another 111 dot-tedlines in printing position. Fig. 2 is a rear sectional elevation taken at about the line w-x of'Fig. 1-'.

- Similarparts are identified by similar signs throughout the views.

The frame of the machine may-comprise a base- 1;;j' corner posts 2, and top plate 3, over 'whichmay r,'una carriage bearing a platenA.

' Rearwfardlystriking type bars '5 are pivoted bearing levers 14. It will be seen that the,

various pivots 13 are situated 'in-a single transverse plane. The levers 14' are levers of the first order, and are pivoted in a single transverse plane upon a transverse rod 15.

The upper edges of the arms 12 are provided with elongated curved treads or rockers'16 adapted to bear up against theunder side .of a common horizontal fulcrum bar 17, and to roll forwardly therealong during the printing strokes of the type bars.

At the beginning of the stroke, the remote or rear end of the arm 12 is in cont'actwith Specification of Letters Patent. Application filed, oa hs '14, 1908." Serial No. 177,oo1=

an elongate tread, a wherewsai 'Pate'nted May 28,1907.

the fulcrum bar, .as indicated in full lines, whereby theleverage of the key upon the type bar is maximum at the first part of the key stroke; but during the remainder thereof the arm rocks or rollsalong the bar, 1ts

in a forward direction unti the type strikes the platen, at which moment theforward point of contact therewith gradually shifting end'of the arm 12 is in contact with the ful-' crum bar, as shown indotted lines. 'At this point the leverage of the key upon the type ar is' least. Thus at the beginning of .the stroke, themovement of the type bar is very slight relatively to that of the key, thereby avoiding a jar to the finger and cushioning the stroke; while at the termination of the stroke the movement of the type bar 1s acby tending to absorb the momentum of the celerated relatively to. that of the key, therehand of the operator and to ease the latter part of the key stroke; while owing to its;

increased speed, the type bar is caused to deliver a powerful blowv against the'platen. It will. be observed that the type actions are sim la in construction and operation, as

wel as compact and inexpensive to manufacture.

'The arms 11 *of the elbow levers are of graduated lengths, being shortest in the middle of the system and of gradually increasing lengthsfrom the middle to the sides of the system; while the arms 12 are in a like mannor made of different lengthsand corresponding curvatures, thus aflording a uniform leverage, touch and dip throughout the system. f The type bars. are provided with returning springs 18 and the key levers mayalso be provi ed withreturning springs 19, although'the latter may be omitted if desired, but as their action upon the key is direct, not affected by the change in the leverage during the key stroke, I prefer to use them, as they have a more uniform action on the keys" than the springs 18.

Variations may be resorted to within the im rovements may be used without others.

at 'I claim as new and desire to secure by Letters-Patent, is I 1. The combination Witha type bar,-.of .a key lever of the first order a sub-lever pivot-' ed'to said ke lever, oneof said levers having scope of-my invention and'portionsf of my,

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tread operates so as to afford a changing leverage during the printing stroke of the type bar,.and a connection from said sub-lever to so as to 'afiord a changing leverage duringtlre printing stroke of the typebar, to diminish the leverage of the key upon the type bar.

3; In a front-strike writing machine, the combination with a rearwardly striking type bar, of a key lever pivoted intermediate of its ends to form a lever of the first order, an

elbow lever pivoted at the rear end portion of said key lever and connected to the type bar; said elbow lever having a rearwardly extending elongated tread; and a fulcrum whereon. said tread rolls to afford a changing leverage during the printing stroke of the type bar.

4. In a'f'ront strike writing machine, the

combination with a rearwardly striking type bar, of a key lever of the first order; an elbow lever pivoted thereto and comprising an upwardly extending 'arm which is connected to the type bar and also a rearwardly extending arm having-an elongated tread upon its upper edge; and a fulrcum whereon said tread rolls during the printing stroke; one of said tread and fulcrum elements being curved.

5. In a front strike writing machine, the combination with a rearwardly striking type bar, of a key lever of the first order, an elbow lever pivoted thereto comprising an upwardly extending arm which is connected to the type bar and also a rearwardly extending arm having an elongated tread upon its up-- per edge; and a fulcrum whereon said, tread v rolls during the printing stroke; one of said tread'and fulcrum elements being curved, and said type bar being shiftable to enable different type to print. 6. In a typewriting machine, the combination of a series of'segmentally arranged type bars, a series of key'levers of the first order, a series of sub-levers pivoted to and'carried by said key levers and both sets of arms of which are progressively longer from the center to the sides of the series of sub-levers.

7. In a front-strike typewriting machine, the combination of a series of segmentally arranged rearwardly striking type bars, a series of key levers of the first order, a series of elbow sub-levers pivoted to and carriedby said key levers, each of said sub-levers having an upwardly extending arm that is operatively connected to a type bar, and a ful crum arm that extends in the general direction of the length of the associated key lever, both sets of arms increasing in length from the center to the sides of the system 'of sublevers, and a fulcrum agaiiist which the fulcrum arms bear andon which they have a rolling action to aflord a changingleverage of which are in a single transverse plane, a series of elbow sub-levers pivoted to the rear ends of and carried by said key levers, each of said sub-levers having an upwardly extending arm that is operatively connected to a type bar, and a rearw'ardly extending fulcrum arm, both sets of arms increasing in length from the center to the sides of thc system of sub-levers, and a fulcrum against which the rearwardly extending fulcrum arms bear and on which they have a rolling action to afford a changing leverage during the printin strokes.

9. In a ront-strike typewriting machine, the combination of a series of segmentally arranged rearwardl y striking type bars, a series of key levers of the first order, the pivots of which are in a single transverse plane, a series of elbow sub-levers pivoted to the rear ends ofvsaid key levers in a single transverse plane, each of said sub-levers having an upwardly extending arm, a link connecting each of said upwardly extending arms to a type bar, a rearwardlyextending fulcrum arm on each sub-lever, both sets of arms of the sub-levers increasing in length as the sides of the system of sub-levers are approached, and a fulcrum against which the rearwardly extending fulcrum arms bear and on which they have a rolling action to afl'ord a changing leverage during the printing strokes.

10. In a front-strike typewritlng machine,

the combination of a series of segmcntally ari ranged rearwardly striking type bars, a series of key levers pivoted intermediate of their ends and the pivots of which are in a single transverse plane, a series of elbow suhlevers pivoted to the rear ends of said key levers in a single transverse phme, each of said sub-levers having an upwardly extcnding arm and a rearwardly extending I'ulcrnm arm that projects beyond the associated key lever and in the general direction of the length thereof, a series of links which connect the said upwardly extending arms to the type bars, a fulcrum with which fulcrum arms co-operatc and on which they have a rolling action to vary the lcvm'agc during the rinting strokes, and curved contact I'm-cs ietween the said fulcruni arms and tut-rum, both sets of arms of said elbow suhdm'tu's increasing in length from the center to the sides of the system.

'11. In. a front-strike typcwrlting HHHlHH.

the combination of a Stli0 of segment ally at, ganged rearwardly striking type liars, a scries of key levers of the first order, aseries of elbow sub-levers pivoted to the rear ends of said key levers. nd with their pivots in a sin 'gl'e transverse plane,- each of said sub-levers having an upwardly, extending arm and a rearwardly extending fulcrum arm that pro jects beyond the associated key lever and in the general direction of the length thereof, a

series of links which connect the said upwardly extending arms to the type bars, a

fulcrum with which fulcrum arms co-dperate,

and on which they have a rolling action to vary the leverage during the printing strokes curved contact faces between the said full-- said elbow sub-levers being shorter atthe center of the system than they are at the sides, and means which aiford a shift of the type bars to change the case position thereof for upper and lower case writing.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this 12th day of October A. D. 1903. i

. v BURNHAM C. STICKNEY.

Witnesses:

E. M. ,WELLS, M. F. HANSURYJBERL

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