US1457620A - Typewriting machine - Google Patents

Description

June 5, 1923.

' 1,457,620 B. J. Down ET AL TYPEWRITING MACHINE Filled July s, 122 2 sheets-sheet 2 3512*@ @1MM/maj,

Patented .lune 5, 1923.

A 't E fifi..

BERNARD J'. DOWD AND ANTHONY UTZ, OF HARTFORD. CONNECTICUT, .ASSIG'NORSl T0 ROYAL TYPEWRITER COMPANY INC., OF NEW YORK, N. Y.,.A CORPORATION 0F Nnw YORK.

Application filed July 3,

To all whom t may concern Be it known that we, BERNARD J. Down, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, and ANTHONY U'rz, a citizen of the United States, and a resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Typewriting Machines, of which the following isa specification. l

This invention relates generally to type bar actions for typewriting machines and has for its main object a construction whereby a uniform touch of the keys' comprising. the keyboard coupled with greater simplicity than has heretofore existed in the construction of the train of connections composing the type bar action, is obtained.

In the accompanying drawings, the invention is disclosed in several concrete and preferred forms in which:

Fig. 1 is a vertical longitudinal sectional view through the well-known Royal. type* writing machine with parts omitted for the sake of clearness, the parts shown being the elements comprising the type bar action of the machine in their relation to the platen.

Fig. 2 is a horizontal sectional view on, the plane of line 2 -2 of Fig. 1.

Fig. 3 is a view similar to Fig. 1 showing a modified form of the invention.

1 indicates a platen, 2 is a type'bar segment extending transversely of the machine and curved in a vertical direction land' 3 indicates a series of typebars pivotally connected at 4 to said type bar segment and normally occupying a forwardly recumbent position in engagement with head rest 5. 6 indicates a 'series of key levers pivotally supported on shaft 7; and 8`indicates a universal bar. Connected to the heel of each type bar is a draw link 9, the other end of which is connected to front link 10 pivotally supported in the framework; and extending between each front link and its complementary key lever is a vertical link 11. Spring 12 restores the key lever to its uppermost position after it has been depressed. 13 is a universal bar link extending between the universal bar andthe train of connections including the key lever and type bar. 14 is a type bar operating spring TYPEWRITING MACHINE.

1922. Serial No. 572,395.

surrounding -each universal bar link, one

end of which is connected to someelement of the; type bar action and therother end of which 1s anchored extraneously thereof as -on the framework or onadjustable member 15. It will be understood that there is only one universal bar and lone'mei'nber 15 but that there 1s a series ofeach ofthe other elements.

.It will be apparent that, owing tothe curvature of the typeharse ment, the type bar operating springs,if ancforedfat points in the same transverse plane on` member 15,- will be unequally extended; 1fihat. is, those springs thateare furthest away Ifrom the center, transversely, ofumembe'r-` 15, will be more extended than the others.'

lnPatent No.11,084,547 of AJanuary 13, 1914, the universal lb'ar link and the type bar operating spring are-.secured tothe draw link by means of axed pendant so that the difference in the tension of the springs is not compensated for. .These pendants, however, occupy a certain amount of space and, create congestion owing to the confinement of the intermediate connections in a limited space. ln Patent No. 1,390,708 of Sept. 13, 1921 a certain new and advantageous construction is disclosed whereby the pendants of Patent No. 1,084,547 are done away with, but n0 means'are shown to compensate for the dierence in extension of the springs. Also, since inl Patent No. 1,390,708 the universal bar link and type bar operating springs are connected to the heel of the type bar at diferent points, the movement ofthe type bar will produce unequal movements of the link) and spring which has certain disadvantages.

These diiliculties are obviated in the construction shown in F igs. 1 and '2 of the present application in that one of the links in the train of connections, in this case the universal bar link, is providediwith an integral looped portion 16 intermediate its ends in which the end of spring 14 is secured. In addition to this, anchorage 15 is of a peculiar construction in that this anchorage, which extends transversely of the machine, has points of attachment for the springs, indicated by holes 17, that are arranged in a horizontal plane and in concave curved relation with respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs: or, defining thef anchorage with relation to a vertical plane passing transversely of the machine through the rear frame 18 thereof, it ivill be seen that the points oit attachment 17 for the springs are arranged Vtrom the center toivard each end of member 15 at a progressivel)v increasing distance with respect to the plane of the rear Wall.

ln Fig. 3 is shown a modified form of the invention. Hei-e draw link 9 is provided with an integral looped portion 18 inter1nediate its ends and universal bar link 13 is hooked into the loiver part of the loop while the type bar operating spring is secured in the upper part ot the loop.

ln both Figs. l and 3, it will be observed.y the type bar operating spring is connected at a fixed point in the train ot connections, the compensation for inequality of extension of the springs being obtained by curved anchorage l5.

As is usual, in machines ot this character, member l5 may be mounted to rock on center 19 and is adjustable toward and away from the type segment by means of screw 20.

' l/Ve claim:

1. A type bar action for typevvriting ma chines comprising: a curved type bar segment, a series of type bars pivotally support ed in the segment, a series of key levers, a universal bar, a series of intermediate connections between the type bars, key levers and the universal bar, a series of type bar operating springs, one for each type bar, each spring connected at a liked point in the train or connections composed of the type bars, key levers. universal bar and iiitermediate connections, and an anchorage for said springs, extending transversely orq the machine, the points of attachment for the springs, on said anchorage being arranged in a horizontal plane and in concave curved relation With respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs.

2. A type'bar action for typevvriting machines comprising: a curved type bar segment, a series of type bars pivotally supported in the segment, a series ot key levers, a universal bar, a series of intermediate connections `bet-Ween the type bars, key levers and the\universal bar, a series of type bar operating springs, one for each type bar, each spring connected at a fixed point in the train of connections com posed of the type bars, key levers, universal bar and intermediate connections, an anc-horage for said springs, extending transverselyT of the machine, the points of attachment for the springs on said anchorage being arranged in a horizontal plane and in concave curved relation with respect to a vertical rfi-sacan plane passing transversely through the type bar segment to thereby equalize the tension on the springs, and means for adjusting the anchorage toward and away from the type bar segment.

3. A type bar action for typewriting ma* chines comprising: a curved type bar segment, a. series ot' type bars pivotally supported in the segment, a series ot key levers, a universal bar. a series ot intermediate connections between the type bars, key levers, and the universal bar, one oi said connections in each series consisting` oi a link having an integral looped portion intermediate, its ends, a series ol type bar operating springs, one Yfor each type bar, each spring connected to the looped portion ot a link, and an anchorage l'or said springs, extending transversely ol the machine, the points of attachment tor the springs on said anchorage being arranged in a horizontal plane and in concave curved relation with respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs.

4. A type bar action Yfor typewriting machines comprising: a transversely extending and vertically curved type bar segment, a series of forwardly recumbent type bars pivotally supported in said segment, a series of key levers, a universal bar, a series orn intermediate connections between the type bars, key llevers and the universal bar, a series ot type bar operating springs, one for each type bar, each sprinor connected at a fixed point in the train of connections composed of the type bars, key levers, universal bar and intermediate connections, and an anchorage tor said springs, extending transversely of the machine, the points of attachment for the springs on said anchorage being arranged in a horizontal plane and in concave curved relation vvith respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs.

5. A'. type bar action for typevvriting machines comprising: a transversely extending and vertically curved type bar segment, a series or forwardly recumbent type bars pivotally supported in said segment, a series of key levers, a universal bar, a series of intermediate connections between the type bars, ey levers and the universal bar, one of said connections in each series consisting of a link having an integral looped portion intermediate its ends, a series et' type bar operating springs, one for each type bar, each spring connected to the looped portion of a link, and an anchorage for said springs, extending transversely of the machine, the points of attachment for the springs on said anchorage being arranged in a horizontal plane and in concave curved relation with respect to a vertical plane passing trans versely through the type bar segment to thereby equalize the tension on the springs.

6. A type bar action for typewriting machines comprising: a curved type bar segment, a series of type bars pivotally supported in the segment, a series of key levers, intermediate connections for actuating the type bars from the key levers, a universal ar, a series of universal bar links between the universal bar and the train of connections including the key levers and the type bars, a series of type bar operating springs, one spring surrounding each link, and an anchorage for said springs, extending transversely of the machine, the points of attachment for the springs being arranged in a horizontal plane and in concave curved relation with respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs.

7 A type bar action for typewriting machines comprising: a transversely extending and vertically curved type bar segment, a series of forwardly recumbent type bars pivotally supported in said segment, a series of key levers, intermediate connections for actuating the type ba'rs from the key levers,

a universal bar, a series of universal bar links between the universal bar and the train of connections including the key levers and type bars, a series of type bar operating springs, one spring surrounding each link, and an ing transversely of the machine, the points of attachment for the springs being arranged in a horizontal plane and in concave curved relation with respect to a vertical plane passing transversely through the type bar segment to thereby equalize the tension on the springs.

8. An anchorage for type bar 'operating springs consisting of a member extending transversely of the machine the points of attachment ranged, from the center toward each end of said member, at a progressively increasing distance with respect to a vertical plane passing transversely of the machine through' therear frame thereof.

Signed at Hartford in the county of Hart- -ford and State of Connecticut this 26 day of June, 1922.

BERNARD J. DOWD. AN THON YA UTZ.

anchorage for said springs, extendthereto for the springs being ar-v

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