US1395503A

US1395503A - Typewriting-machine

Info

Publication number: US1395503A
Application number: US289203A
Authority: US
Inventors: Alfred G F Kurowski
Original assignee: Underwood Typewriter Co
Current assignee: Underwood Typewriter Co
Priority date: 1919-04-11
Filing date: 1919-04-11
Publication date: 1921-11-01
Anticipated expiration: 1938-11-01

Description

A. G. F. KUROWSKI.-

TYPEWRITING MACHINE.

V APPLICATION FILED APR1| 1919. 1,395,503; Patented Nov. 1, 1921.

2 SHEETS-SHEET l.

A. G. F. KUROWSKI. TYPEWRITING MACHINE.

APPLlcATloN FILED APR.11, 1919.

Patented Nov. 1, 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

I. ALFRED G. l'. KUROWSKI, OF BROOKLYN NEW YORK, ASSIGNOR TO'UNDERWOOD TYPEWRITER COMPANY, 0F NEW YORK, N. Y., A CORPORATION 0F DELAWARE.

TYPEWBITING-MACHINE.

1,395,503. Specication of Application. iled April 11,

To all 'whom it may concem:

Be it known that I, ALFRED G. F. KU- RowsKI, a citizen of the United States, formerly a citizen of Germany, residingin Brooklyn borough, in the county of Klngs, city and State of New York, have invented certain new and useful Improvements in Typewriting-Machines, of which the following is a specification.

This invention relates to typewriting machines, and particularly those of the Under wood type of construction, and one object of the invention is to render the type-bar action less noisy. The type-bars are usually ar'- rested by striking a solid stop or anvil just as the types are about to strike the platen; this stop v being placed near the type-bar hubs, and the type-bars springing ast the arresting point, so as to deliver t e type impression upon the platen. One of the features of the present invention is to provide a yielding stop for the type-bars in place of the rigid stop heretofore employed. This stop, which is in the form of a segment, is

provided with a yielding support or cushion.

Such cushioning means may consist of a felt strip held in place on the usual typebar segment casting, on top of which strip is suitably secured a thin' piece of s ringsteel against which the type-bars stri e; or said cushioning means may consist of a hardened and tempered s ring inserted into a dovetailed'groove in t e type-bar segment, said spring having a type-bar contact surface or crown. Still other arrangements of cushioning means may be employed, as for instance a series of looped springs may be interposed between the type-bar segment and a thin piece of spring steel, the latter formin the stop for the type-bars.

ther features and advantages will hereinafter appear;

In the accompanying drawings,

. Figure 1 is a si e elevation of an UnderwoodA typewriting machine, showing 4my cushioning means applied thereto.

Fig. 2 is an enlarged detail of a section of the type-bar segment, showing the type-bar sto and cushioning means.

ig. 3 is a front view.

Fig. 4 -is a diagrammatic view, showing the shape of the spring-steel plate prior to being secured in place on the segment.

Figs. 5, 6 and 7 are detail views.

1 to 11, inclusive, the type-bar segment casting Letters Patent Patented Nov. 1, 1921.

1919. Serial No. 289,203.

Fig. t3 is a detail sectional view of a somewhat dlfferent form of sto and cushioning means from that shown in lFigs. 1 to 7.

Fig; 9 is a front elevation of the form shown in Fig. 8.

Figs. 10 and l1 are details.

Fig. 12' is an enlarged sectional view of still another form of stop and cushioning means. I

Fig. 13 is a front elevation of devices shown in Fig. 12. l

Figs. 14 and 15 show a different form.v

Referring to the drawin key-levers 1,

through means of intermedlate levers 2, are adapted to swing ty e-bars 3 upwardly and rearwardly against t e front face of a platen V 0 4 mounted in a carriage 5. The type-bars 3 are pivoted at 6 to type-bar segment casting 7, the line of pivots forming anarc. In order to arrest the types as they are about to strike the face of the platen, I 1nterpose a stop in the path of movement of a type-bar, so located as to be encountered by a type-bar at about the time the type thereof comes in contact with the platen, and preferably I mount said stop and its cushioning means on the type-bar segment.

In the form of device shown in Figs. 1 to 7, I secure a series of looped springs 8 to the segment by means of screws9, sald springs belng arranged in the arc of a circle which is concentric with the line of pivots of the type-bars. On the outside of the looped springs, a stop-plate 10 of spring-steel is mounted, said plate being secured at its ends only, by screws 11, which take into the segment casting, spacing washers 12 being interposed between the ends of the `plate 10 and the casting. This plate being of springsteel and very thin, it will be apparent that if it were applied in a perfectl fiat c ondition and secured only by the en screws 11, it might have a tendency to bulge out at the middle. To avoid this, I give the spring an initial bendinwardly as shown in Fig. 4, so that when the ends are subsequently screwed down, the pressure of the plate on the s rings will be substantially uniform t roughout its len h.

In the form of t e device shown in Figs. 8

7 is milled out at 13 to form a groove, which has its edges undercut or dovetailed, and fitting into this .groove is a eushlonmg spring lilil 14 of hardened and tempered steel, having the shape shown in Figs. 10 and 11. The types strike the flat outer surface 14", which merges at each edge into the small upper end 14" of an S-shaped side terminating in a large bottom 14, which fits into the undercut'13. With this form of spring, n o separate securing means is necessary, the tension of the spring itself holding it in position. Furthermore, if it is desirable to present a new striking surface for the type-bars in case 'of wear, the spring may be moved endwise sli htly for this purpose.

gigs. 12 and 13 show a cushioning device comprising a segmental piece of felt 15, secured between a type-bar stop-plate 17 and the type-bar segment 7, being secured there; to by screws 18, the type-bar segment having a groove 16 formed therein for the felt.

In Figs. 14 and 15, the cushion 15 is placed in a channel plate 19, which is secured to the type-bar segment by screws 18, the latter passing through holes in the plate 17.

In each of the above-describedforms, the cushion comprises a metal plate against which the type-bars strike. This plate is located nearer the printing point than the usual Underwood universal bar 20, which lies in the usual opening 21 of the segment 7 near the pivot 6, and is adapted to be struck by the heel 22 of any type-bar that approaches the platen.

Variations may be resorted to within the scope of the invention, and portions of the im rovements may be used without others.

a aving thus described my invention, I claim:

1. In a typewriting machine comprising a platen, type-bars having types thereon and pivots for said tvne-bars, the combination of a single metallic arresting means effective for all of said type-bars and interposed in their path of movement so as to be encountered thereby at approximately the time the types come in contact with the platen, and a resilient support for said arresting means.

2. In a typewriting machine comprising a platen, a segment, type-bars pivoted on the segment, and a universal bar near the typeplvots, each of said type-bars having type at the end remote from its pivot, the combination of a single metallic arresting means supported on the segment and interposed in the path of swingof said tvne-bars, and so located as to engage each of said type-bars by a portion thereof between its pivot and ntype-ends at a time when said type cornes in contact with the platen, and a resilient support for the arresting means on the segment between the universal bar and the printing point.

.3. In a typewriting machine, the combination with a segment, of a series of type-bars plvoted upon its periphery, a universal bar near its periphery, an annular metallic stop lying in front of the segment between the universal bar and the printing point, means holding said stop to the segment at its ends, and resilient means for supporting it between its ends, to enable it to arrest the typebars so that they print by their springing.

4. In a typewriting machine, the combination with a series of pivoted type-bars, the line of pivots of said bars forming an arc, of a metallic stop having cushioning means supporting it and common to all of said type-bars and forming an arc concentric with the arc formed by the line of pivots, said stop and cushioning means adapted to be encountered by each type-bar at about the time the type thereof comes in `contact with the platen, and a universal bar between the stops and pivots.

5. In a typewriting machine, the combination with a segment, of a series of type-bars pivoted upon its periphery, a universal bar near its periphery, an annular metallic stop lyingin front of the segment between the universal bar and the printing point, adapted to arrest the type-bars so that they print by springing, devices holding said stop to the segment at its ends, a series' of flat springs having bent-over ends to support said stop, and a device holding each spring upon the segment.

6. In a typewriting machine, the combination with a segment, of a series of type-bars pivoted upon its periphery, a universal bar -near its periphery, an annular metallic stop lying in front of the segment between the universal bar and the printing point, adapted to arrest the type-bars so that they prmt by springing, devices holding said stop to the segment at its ends, a series of flat springs behind the stop, each having two bent-over ends to bear against the stop, and a screw for each spring threaded into the segment and substantially concealed behind the stop.

7. In a typewriting machine, the combination with a series of type-bars, of a type-bar segment supporting said type-bars, an annular spring-steel plate secured to said seg- -ment and adapted to arrest said bars so that the types print by the springing of the type-bars, and cushioning means interposed said segment between the universal bar and l the printing point to arrest the type-bars and a `serles of looped sprin s interposed between said segment and p ate to form cushioning means for said type-bars.

9. In a typewriting machine, the combinat1on with a serles of type-bars, of a type-bar segment for supporting said type-bars, an so that said plate will lie flat upon said cushannular spring-steel plate secured at its ends ioning means when secured at its ends. only to said segment and adapted to arrest' the type-bars so that the types print by the ALFRED G' F KUROWSKI' 5 springlng of the bars, and cushionin means Witnesses: 1 v

interposed'between said se ent an plate, CATHERDIE A. NEWELL said plate having a slight mitial curvature, JENNm P. THORNE.