Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS835575 A
Publication typeGrant
Publication dateNov 13, 1906
Filing dateAug 19, 1904
Priority dateAug 19, 1904
Publication numberUS 835575 A, US 835575A, US-A-835575, US835575 A, US835575A
InventorsRobert H Strother
Original AssigneeUnion Typewriter Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Type-writing machine.
US 835575 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

- No. 835,575. y PATENTBD Nov. 13, 1905.

' R. 11. STROTHER.



25, I if@ JEM/f fm1/55%,

H15 TTCJRNEY No. 835,575. PATENTED NOV. 13, 1906.




MA1-M5555.- INVENTDR. 7h, 2Q@


No. 835,575. PATENTED NOV. I3, 1906.






TYPE-WRITING. lvlAc'l-uNl-z.v

Specification of Letters Patent- Application filed August 19.1904. Serial. No. 221,407.

-io (all, whom, it may' concern.:

Be it known that I, ROBERT H. STROTHER, a citizen oi the United Statles,` and a resident of the borough of Manhattan, city of New` York, in the county of Newr York and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, oi' which the following is a specification. y

My invention relates to type-writing niachines, and more especially to the type-action of such machines. p

My invention relates also to the case-shiftingI mechanism. n type-Writing machines, and more especially in front-strike type-Writers, the typebars are usually arranged in a segment of a circle and said type-bars are actuated by a system of key-levers. The Width which' it is desirable to give to the key-lever system is greater than that which it is desirable to give to the system of type-bars. Moreover, the key-levers usually move up and .down in vertical planes', whereas the type-.bars swing in pllanes at different inclinations to the vertica The principal object of my. invention is to so connect a system of type-bars with a systemo'r` key-levers of greater Width than said system of type-bars as thatall of the parts shall be operated by direct pulls or pushes a plied substantially in the planes in which t e pivoted elements swing, and therefore Without torsional stra-in.

One embodiment of my'invention is illustrated in the accompanying drawings, in Which i v Figure 1 is a-ront to rear vertical section of atype-Writingmachine. Fig.'2 is a transverse vertical section of the same, taken substantially on thc'line :up: if-Fig. 1 and looking toward the back of the machine; and Fig. 3 is a diagrammatical lllanview showing the` type-bar system, and the system of connectin devices. M have shown `my invention applied to a front-strike type-writer" the main frame of Y which comprises a base portion 1,- l'r'om which rise posts 2, Whichsupport a top plate 3. on

' which is mounted a carriage having a platen 4. series of type-bars 5 are pivotallyy l mounted on a segment 6, and the free ends of l 2, and said hangersare mounted one on each ey-lever system, the

segmental type-rest 7, which issupported by arms 8, connected with the type-bar segment. t

The type-bars are mounted to. swing up'- ward and'backward to cause the types to strike against the front face of the platen. The' precise manner in which said type-bars are mounted on the'segme'nt is immaterial to my invention. As shown in the present case, ,said 'type-bars are pivoted on a pivot rod or wire 9, which lies in a slot in the segment 6, 'and each of said type-bars is guided by a transverse slot 10 in said segment. Each of the type-bars has an arm v11,- to which an'operatin -link 12 is pivoted at 13. In ont-strike machines, the operatinglinks are connected to the 'type-bars, sometimes above an'd sometimes below the pivots g' of the' latter, and said links extend toward the iront of the machine'in'sonie instances, and inotherinstances they extend.l toward vthe backoi the machine. Moreover, said links 'are sometimes pull-links and sometimes ,push-links. For the purpose of illustrating vthe principle 'oi my -invention I have deemed 1t sufficient to show it applied to one of. these arrangements. In the machinev shown in the drawings the links 12 are pull-links connected to the typebars above the pivots of the latter, and. they extend toward the back oi' the machine.

`the upwardly-extending arm of a bell-crank sublever 15.which isl ivotally mounted in tending arm which is connected by a link 17 4with a key-lever 18. As shown in the present case, the key-levers consist of levers ex- .tending from the keyboardtoward the back of the machine and having keys 19 ion-their front-ends and pivoted at their rear endson a stationary 'rod -20.- So far as ymy invention is concerned, however, these key-levers might have other forms. For example, they might have the form oi? rock-shafts rovided'with arms, such as are used in the mith Premier type-Writer, l

he hangers 16 are rigidly mounted on a iixed segment 21, which is secured by screws 22 to the base portion 1 of the main Vframe.

Said segment 21 is stepped, as sliown in Fig.

said type-bars normally rest in a basket or Said link is pivoted at its other end at 14 .tol

a hanger 16 and which as a horizontally-exste To this end each of said hangers has a re uced ortion 23, Fig. 1, which yextends into a ho e which opens on the upper surface of'each step. The hangers are secured in position by set-screws 24, which are threaded into the segment and which engage said reduced portion 23 of the hangers. 'The segment 2I is of greater radius than the typebar segment 6 and stands lower in the machine than said segment. The links 12 lie substantially along elementsoi` the frustum of a cone, the axis of which passes through the center of the type-bar segment. In Figs. 1 and 3 the lines a represent two of the elements of said cone, the 'line b represents the axis of said cone, and the point C is theapex of the cone. The bell-crank sublevers 15 swing in vertical planes which intersect in a vertical linet'hrough the oint C. y

As' will be understood y reference to Fig. 3, the parts are so designed that each of the links 17 is vertically disposed, its point of connection with the sublever 15 standing vertically over its key-lever.k Each of the links 17 therefore lies in the lane in which its keylever moves, and it a so lies in the vertical plane in which its sublever swings. In other words, this link lies substantiall along the line of intersection of the plane of t 1e keylever and the lane of thesublever. By an inspection of ig. 3 it vwill be seen that each of the links 12li'es in the plane of its sublever, and by an inspection of Fig. 2 it will be seen that each of saidlinks lies also in the plane oi its type-bar-that is to say, in theplanein which'the arm 11 of said type-bar swings. It will be perceived, therefore, that each of the links 12 lies substantiall in theline of intersection o the plane of its sublever with the i? memberswings.

with two types 25.

For' someof the purposes of my invention it lis not necessary that the sublevers should be inv theinature ofy bellcrank levers, butl other o plating devices might be substituted 'for sai' bellfcranks without departingi'rom my invention.

`- Ixprefer to mounta plurality'of types 'on ea'cht e-bar, and in the present case I have accor ingly shown each type-bar e uipped p '.It is obvious that4 the Vplatenvmay be shifted to cause one or the other of these types to print; but I prefer to shift the ty eebar segment for this urpose.

It will beo vious that if'the case-s t motion of said segmentconsisted of a rectilinear vertical motion thensucha motion would re-m sun in a pun on' each ofthe links 12 .qnd a Kpartial'operation of all of the type-bars. I

headed and shouldered screws 28, which passk through said arms and are threaded into the ends of the brackets 26. The common axis of vthese pivot-screws' passes substantially through the pointsl, at which the two end links 12 are pivoted to the end type-bars oi 'the system. The arms 27 are rigidly mountl ed on or are formed integral with a rockshaft 28, which is ivoted at its ends on cone i pivot-screws 29, w ich are threaded through brackets 30, which depend from the top plate 3. In the present instance the axis of oscilf lation of the shaft 28 passes through the pivot-pointsl 14 ofthe two links 12, which are at the ends of the series. In order-to avoid interference. of said rock-shaft with these links and their sublevers, the rock-shaft is bent, as shown in Fi s. 1 and 2. Ari-arm 31 projects from the roc -shaft 28 toward the back of the machine and is connected by a link 32, Fig. 1, with a case-shift-key lever 38, Fig. 2. In the. present instance I have shown two case-shift-key levers-vone on each side of the machine. if a'case-shiit key be depressed. the shaft528 will be rocked and the arms 27 will be ele vated, thus raising the t e-barsegment- The parts being constructe as described,it is obvious that each of the end links 12 ofthe series will swing about itspoint of connection'with its sublever as a pivot. In order to guide the segment in such a manner thatV the remaining linkswill also operate in the same manner, a link 34 is ivoted at its forward endin ears 35, depen ing from the middle of the type-bar segment, and said link extends downward'and backward and is pivoted at its rear end in a han er 36, which is secured by a set-screw 37 to tIi similar to that in which the hangers 16 are secured to said segment. This link guides the lower middle portion of the type-bar segment in such a manner that said segment swin sin case-shifting, as indicated by dotted lines in Fig. 1, so that the lower links 12 move about their ends-14 as pivots. When the arts are swung in this manner, the interme iate links will'also's'wing about their ends 14as pivots, so that when the segment is shifted no pull will be imposed upon any of the links bv such shifting motion.

The shifting motion of thel type-bar seglaent is adjusapiy limitar in .both daaraan@ e segment 21 in a manner IDO The construction issueh that l'io .byLettersPatenn is 1. In a front-strike type-writing machine;

by seti-screws 38, which are threaded through .brackets 39,- which are secured. to the top plate 3. 'Each of thescrew'sI 38 is provided with a lock-nut 40.

Itis-not essential for some of the purposes ofmvention that all of the links 12 .shall` lie'in the surface of a right cone; but some of' -the advantages or said inventionfare secured by arrangements of said link's,`which may be described in general terms as conical arrangements, but in which'said links are not elements of a frustumof a right cone.

' What I. claim v*as new, and de sirefto secure the combination'of a segmentally-arranged series of front-strike type-bars; a conicallyarranged series 'of operating-links connected to said type-bars; a series of sublevers mounted to Swingin non-parallel planes and connected to said links ;and a series of vertically- -movablekey-levers connected with said sub- .levers A 2. In a front-strike type-writing machine,

Athe combination of a segmentally-'arran'ged 'series of front-strike type-bars; a segmenton Which said type-bars: are pivotally mounted r a conically-arranged 'series of links -con'" nected with said type-bars; a series' of sub-A levers mounted to swing in convergin ver-' tical planes and connected with said inks;

and'4 a series of key-levers connected withl said series of sublever's. Y 3. In a front-strike type-Writing machine, the combination of Aa series of key-levers; a

.segmentally-arranged series of front-strike mf bars; a conically-arranged Aseries of connected at one endwith said typebars; a series of bell-crank sublevers having upwardly-extending arms to which said links are connected at. the other ends'there'of and ha O' horizontally extendingarms coninec'te with said ke -levers 4.5111 a rontestri e type-Writingmachine', the combination of a series of key-levers; "a series of subleversfmounted to swing in con'- verging vez-tical planes saidsublevers' have.

lng horizontally-disposed arms 'which aresaid ks; anda case-shift mechanism-arrangedto shiftl said type-bars.

6. In a-front-strike typefwriting machine, the combina-tion of -a series of front-strike typebarseach carrying a plurality of types; f 'a segment on which said type-bars are piv- "otallyfmounted5a seriesfofsublevcrs-mountplane of its' -with sald subleve'rs.

12. In a front-strike 'type-writing malv ed on a segment-of greater-radius than said typefbar segment; a series of links connect# `ing said type-bars and sublevers; a series of keys 'connected with: said gsublcvers; and

means for imparting a .case-shift motion t'o saidtype-bar segment. e

7. In a type-writing machine, the combination of a series of type-bars eachcarrying a plurality of types; a segment on which 'said type-bars are pivotallyjmounted; a series of actuating devices for said type-bars; a conically-arranged series of links' connecting said actuating devices with. saidtype-bars means for shifting said type-bai", segment; and means for guiding the shiftinmotion.' of

said segment so that each link turns'about'its point of connection. with lits actuating'- devicefas a center. Q 8. In a type-writing machine, the combination of a series of typebars each carrying a plurality of types; a segment on whichjsaid type-bars are pivotallyv mounted; a series of key-levers, wider ,than said seriesfof'type#. bars; a series of sublev'ers connected'with said key-levers; aconicall -arranged series ofvlink's connecting saidjsu "levers withsaidkey-levers; a rock-shaft having 'arms con nected with the said segment near theends'v thereof a link for guiding the middle of.- said segment;l and al casesshift key for'shiting said segment.A

9. In a type-writing machine, the combi-' nation of a segmentally-arrangedseries of type-bars pivoted to swing in planes' at differ-5l ent inclinations to the vertical; a conicallyarranged series o f' links vconnected with-said type-bars; a serles of sublevers connected with said links, each su-blever havin a hori-"g zontal vot and swinging substantia lyin the vertica plane of its link; and a series of key- 'levers connected'with said sublevers.

10. In a type-writin machine, the combi# nation "of, a segmentaIly-arranged seriesy of front-strike type-'bars'g-a conically-arranged series of links connected to vsaid type-bars,

each link lying substantially' in the plane of :its type-bar; a sevmentally-arranged vseries evers, each having a horizontal pivot' of sub vand swin substantially` in. the vertical gmnk; and-a series of verticall movable key-levers' connected Withsai'dsub levers. 11. In a type-writing machine'the combination of a series of type-bars pivoted to swing in planes that intersectin'la line; a series of links. connecting s aid sublevers and said Vt e bars; and key -levers connected chine, the combination of a series of frontloo ibs c IIQ,

strike 4type-bars; a conically-arranged series Ao links connectedwith said type-bars; a se- I zo i ries of subleversfpivoted toswing Ain planes that intersect ina line at right angles to the first-mentioned line; a conically-arranged se- IOA sublevers.

n ally-arranged series of links connected with each sublever ivoted to swing substantially in the verticalp plane of its link; a series of key-levers; and a series of substantially vertical links connecting said keylevers to said 13. In a'type-writing machine, the combination of a series oi type-bars.; a segment on which said type-bars are mounted; a conically-arranged series of links connected to said type-bars; a series of operating devices connected to said links; means Jfor imparting'to said type-bar segment a case-shift motion in a direction across the axis of said segment; and means for guiding the motion of said segment so that the links turn about their points of' connection with said operating devices as centers.

14. In a front-strike type-writing machine, the combination of a series of frontstrike type-bars; a segment on which said typeebars `are pivotally mounted; a conicsaid type-bars; a series of sublevers connected to said links; a rock-shaft having arms pivoted to said type-bar segment; a link connected to said type-bar segment and means for imparting a case-shift motion to said segment, said arms and link being so disposed as to guide the motion of said seg- 'ment to cause cach of said links to swing about its point of connection with its sublever as a center.

15. In a front-strike type-Writing in achine, the combination of a type-bar seg- Vries of sublevers connected with said links, to a stationary part of the framework; and

ment, a series of front-strike type-bars pivotally mounted on said segment, a series of bell-cranksublevers each pivoted to swing in a vertical plane and eachhaving a vertical arm andv a horizontal arm, links connecting the vertical arms of said sublevers with said type-bars, a series of key-levers, and links connecting said key-leverswith the horizontal arms of said sublevers.

l Y Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 18th day of August, A. D. 1904.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2944650 *Jan 29, 1958Jul 12, 1960Triumph Werke Nuernberg AgShifting arrangement for typewriters
US4039406 *May 7, 1976Aug 2, 1977Noranda Mines LimitedRecovering copper from concentrates with insoluble sulfate forming leach
Cooperative ClassificationB41J7/02