US1425024A - Typewriting machine - Google Patents

Description

A. G. F. KUROWSKI.

TYPEWRITING MACHINE.

APPLICATION FJLED AUG.5, 1919.

Patented Aug. 8,1922.

2 SHEETS-SHEET I.

//7 van for:

A. G. F. KUROWSKI.

TYPEWRITING MACHINE.

APPLICATION FILED AUG.5. I919.

Eatented Aug. 8, 1922 2 SHEETS-SHEET 2.

UNHTED STATES arana castes ALFRED G. F. KUROWSKI, F BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application filed August 5, 1819.

radially to a common point, to print against the front side of a platen.

The invention relates more particularly to means to support the segmentupon which the type-bars are mounted,

A featureof the invention is to arrange a bridge or crossbar to support the type-bar segment in front thereof, thereby securing room at the rear of the segment for, the feedrolls that run on the platen, and for other carriage parts.

In carrying out the invention, I have found it advantageous to prov de the crossbar wlthan arcuate portion or depression to fit into an arcuate groove formed in the type-bar segment, thereby avoiding other parts on the type-bar segment and reducing bulk to a minimum.

Ithas been proposed to mount the typebar segment on the bridge or cross-bar which is integral with the main frame of the machine, I have found it advantageous, however, to provide ,a separate cross-bar which may be assembled with the type-bar segment to form a unit, to be placed in the machine after assembling.

One advantage in making the cross-bar and type-bar segment of separate parts isto facilitate the machining of the type-bar segment and especially the cuttingof the slots therein.

Another advantage of this structure is that type-bar segments with a greater or less number of type-bars may be assembled with the cross-bars,

Other features and advantages will hereinafter appear. 2

i In the accompanying drawings,

Figure 1 is a sectional side view of an Underwood machine, showing my invention applied thereto; the section being taken near the middle of the ma h ne Specification of Letters Patent.

Patented Au 8, 1922.,

Serial No. 315,372.

Figure 2 is a perspective view of the typebar segment and the cross-bar assembled.

Figure 3 is a perspective view of the typebar segment and the cross-bar, before assembling.

Figure 4 is a detail. perspective view of one end of the type-bar segment as seen from the back, together with a portion of the segment-supporting cross-bar.

Key-levers 10, when depressed by keys 11, swing bell-cranks 12 about their fulcrum 13 to swing type-bars 14L upwardly and rearwardly to cause types 15 to print against the front side of a rotatable platen 16 on a traveling carriage 17.

The type-bars 14 are adapted to swing about a curved pivot rod 18 held in a groove 20 formed in the back of a type-bar segment 21 which may be provided with radial slots 22, to guide the type-bars towards a common printing point.

The type-bars 14: at the end of their upward stroke, strike against an arcuate ridge or projection forming a curved anvil 23 on the front of the segment 21 to cause a resilient action of the type-bars 14 against the platen 16.

A guide 24 is provided to guide the typebars 14: at the printing point. said guide be ing secured to the type-bar segment 21 by screws 25.

The. outer portion 26 of the segment 21 having the radial slots 22 therein is raised from the body portion-27 of the segment to form an arcuate ridge or projection on the front of the segment, to providev sufficient guiding surface in the slots 22 to guide the type-bars 14 towards the type-guide 24. It will also be seen that the type-bar anvil 23 is also raised from the body portion of the type-bar segment. and that it is in the form of an are so as to be the same distance away from the pivot of each type-bar.

' A cross-bar or bridge 28 (Figure 3) is placed against the front face of the body portion 27 of the type-bar segment 21,.said cross-bar 28 being provided with an arcuate portion 30 fitting into an arcuate groove 31 formed between the spaced type-bar anvil 23 and the projecting outer part 26 of the type-bar segment 21.

The segment may be readily locatedrelatively to the cross-bar 28, to bring rivet holes and 33 i to r g ster with each other, by

Mitt

opposing portions including the anvil 23 and the ends 8% of the outer portion 26, between which ;the oross b ar :28 {is :placed. Fllhe type-(bar segment. 21 may then be rigidly secured to the cross-bar 28 by rivets 85, which may be headed in the back of the segment (Figure 4) after assembling.

After "the segment 21 and crosssbar 28 are assembled the latter may be secured in place on a main frame 36of =the machine. For this purpose, the cross-bar 28 has two lateral extensions 37 to rest on ledges 38 projecting inwardly from the main frame 36 upon which it is held in place by suitable screws 40.

In this construction, it will be seen the .cross-bar 28 reaches from one side of the machine to, the other and is located in front of the segment 21, Without interfering with the ty pe-bar guide 24 or obstructing'the The ,arcuate portion of the crossbar 28. is L shaped in cross-section, {the hori- ,beseen that the arcuate portion of the cross- L the cross-barx28. it will befurther noted that ,the arcuate portion 30 of the cross-bar,

baris curved at 42, providing a forwardlyvinclined surface, to ,prevent such accumulation on the extension all. So 'longas foreign matter cannot accumulate and pileup on the forwardly-inclined surface 42 of the ledge {or flange 41, it cannot ,fall off this ledge in a quantity large enough at any one time toclog the guide-slots 22. v

One of ,the advantages in making the vcross-bar and segment of two separate pieces is,t o avoid interference of the lateral ,prqections 37 w th the. various tools ,used to machine the segment. i

It'will be noted. that the arcuate'portion 30,;ofthecross-bar 28, and the arcuate portion 23 of the segment2l, together with the ,arcuate slotted ridge 26 of the latter, coperateto form interenrraging parts which interlock to position the segment 21 against both ,latenalland vertical. sliding movement which fits into the ,groove 3170f the segment,

is therelayv ,countersunkinto the front face .gofthesegmentto anextent so that its front faces are flush. respectively, with the front face of the anvil and-,ofgt he' slotted ridge- .26, the ridge 26 being ofgreater height or progect rng farthenthan the anvil 23 to an extent corresponding},- to the width of theforward extension or flange 41 on the 31 ate portion 30 'of the cross-bar, as Clearly shown in Figures 1 and 2 of the drawings.

it will be evident, @by 311628011 ofithis arrangement when therivets 35 arein place, that a very firm and compact construction is produced,

Variations may be resorted to within the print at acommon point against a platen, of a segment ,to support said type-bars, a V

scope of the invention, and portions 'of -th-e curved anvil on said segment against which the typebars may strike, and a cross-bar arranged at the front of said segment 'to supportthe latter, said crossbarfhavmg an arcuate portion to fit under said anvil.

In a f ty-p'ewriting Inachine, the combination with radially arranged "type-bars to print at a common point against a platen,

of a segmenttosupportsaidtyp e bars, saidsegment having an" arcu'ate groove therein,

and a cross bar to support said segment,

said cross-bar havingan arcuate portion to fit t th s o 31' In a frontstrike typew riting machine havi g a platen and raclially-arranged' typefront of ,the platen, the combination off a segment for pivotally' supporting the typebar s, a segment-supporting cross-bar atithe front of the seamentland having a middle 9, "bars to printat a common point against the portion below the topofpthesegment so that the middle portionof the segment extends unwardlvabove the middle portion'of the (firms-bar; and I type-bar guide secured "to the front of the semen above said portion of the crossbar. i I

, 4; In. ,a ont-str'ke ,barsto print at a common point against the front, of the platen, the combination vnev ne ma having a platen and rac'lially-arranged typeof a segment for pivotally supporting the .typehars and having spaced projections on one face thereof. and a segment 'sl p port ng crossbar entendingjacross the face of the segment between saidprojections, said. .Plo-

iections being" {so arranged and the cross bar being so shaped' als to position the segment on the cross-bar against bothglateral and vertical SlIdLl'lL movement thereon.

bars to print at a common point against the fr -of the, platen th co n i n of a n a en -s r k t rewrit ng' m hi e, havinga platen and radial'lyarranged type-' front of the segmenthaving slots therein for" guiding the type-bars and forming an arouatc uppershouflder, and ,a segment-support- I cross-bar egrtending across thei front fa the segment and having an arcuate portion overlying said arcuate upper shoulder, said arcuate portion of the cross-bar having a forwardly inclined upper surface to shed foreign matter so as to prevent its accumulation thereon,

6. In a froiitstrike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the typebars, and a segment-supporting cross-bar countersunk into one face of the segment so as to be substantially flush therewith.

7. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the typebars and having spaced pro ections on one face thereof, and a segment-supporting cross-bar on the machine extending across the face of the segment between said projections and having outer faces substantially flush with the outer faces of said projections.

8. In a typewriting machine, the combination with radially-arranged type-bars to print at a common point against a platen, of a segment to support said type-bars, said segment having an arcuate groove therein, and a crossbar on said machine to support said segment, said cross-bar having an arcuate portion to fit into the groove, the crossbar being flush with the front faces of the segment,

9. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the type bars, an arcuate ridge or projection on the front of the segment having slots therein for guiding the type-bars and forming an arcuate upper shoulder, and a cross-bar on the machine secured to the segment at the front thereof to support the latter and having an arcuate portion to fit over said arouate upper shoulder.

10. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the typebars, an arcuate ridge or projection on the front of the segment having slots therein for guiding the type-bars and forming an arcuate upper shoulder, a cross-bar on the machine secured to the segment at the front thereof to support the latter and having an arcuate portion to fit over said arcuate upper shoulder, and a type-bar guide secured to the front of the segment above the armate portion of the cross-bar.

11. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the type bars, an arcuate ridge on the front of the segment having slots therein for guiding the type-bars, a second arcuate ridge above the first forming an anvil for the type-bars to strike against, an arcuate groove being formed between the two said ridges, and a segment-supporting cross-bar on the machine having an arcuate portion to fit into the groove between the ridges.

12. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the typebars, an arcuate ridge on the front of the segment having slots therein for guiding the type-bars, a second arcuate ridge above the first forming an anvil for the type-bars to strike against, an arcuate groove being formed between the said two ridges, a segment-supporting cross-bar on the machine having an arcuate portion to fit into the groove, and a type-bar guide secured to the front of the segment above the anvil-forming ridge.

13. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the front of the platen, the combination of a segment for pivotally supporting the typebars, the segment having an arcuate groove in the front side thereof and having radial slots below the groove for guiding the typebars, and a segment-supporting cross-bar at the front of the segment having an arcuate portion to fit into the groove.

14. In a front-strike typewriting machine having a platen and radially-arranged typebars to print at a common point against the.

front of the platen, the combination of a segment for pivotally supporting the type bars, and a segment-supporting cross-bar extending across one face of the segment, the segment and the cross-bar having interengaging parts to interlock to position the segment on the cross-bar against both lateral and vertical sliding movement thereon.

ALFRED G. F. KUROW SKI.

Witnesses:

CATHERINE A. NEWELL, EDITH B. LIBBEY.

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