US1856340A - Typewriting machine - Google Patents

Description

May 3, 1932- c. A. JoERlssEN 1,856,340

TYPEWRITING MACHINE Filed Feb. 1g, 1927 P Sheets-sheet 1 liall Il l May 3, `1932. c. A. JoERlssEN TYPEWRITING MACHINE Filed Feb. lz, 1927 2 Sheets-Sheet Caf/Jy. Iyar/55e@ Patented May 3, 14932 NITED STATES CARL A. JOERISSEN, OF WASHINGTON, DISTRICT OF COLUMBIA I.

TYPEWRITING MACHINE Application led February 12, 1927. Serial No. 167,734.

The present invention relates to improvements in typewriting machines and particularly to the means for transmittingv power from the key levers tothe type carrying members'of such a machine, whereby the parts may be operated with a minimum amount of noise. The invention represents, i'n part, a development along lines generally covered in United States Patent 1,846,339, issued to me Febru-l 0 ary.23,1932.

According to the present invent-ion means are provided whereby the printing type will be positively forced into printing relation to the platen but will not strike the latter with a sudden blow as inthe forms of machines at present commonly in use. More particularly the. present .invention relates to means by which the means Lthat normally act .to check movement -of the type carriers to printingrelation may be rendered inoperative, at will, so that the machine will be converted from a noiseless to a form of the character commonly in use in which the type carriers contact with the platen with a.,sud

den blow. ,l e

\Vith this and other ends in view, the invention consists .in the construction and 'arrangement of parts that will be hereinafter described and claimed, reference being had to the accompanying drawingsin which,

Figure 1 is a diagrammatic view of portions of a typewriting machine embodying the present invention. the type. barbeing shown in its position of rest.

l 'Figure 2 is a similar view showing the parts in a slightly different relation. A

Figure 3 is a similar view showing the type bar in printing position.

Figure 4 is a view similar to Figure 3' with the means for normally Vchecking movement of the type carrier to printing relation rendered inoperative. l

In the drawings only those portionsof atvpewriting'machine necessary to illust-rate the present invention are shown' and, t-o a considerable degree. the illustration is more or less diagrammatic and conventional.

lt will be appreciated, ot course, that the invention is not 'limited t'o use with a typewriting machine in which the printing type are carried by pivotally mounted type bars, but as this is a common such an embodiment is shown in the draw- 1n s. y

gIt is to,be understood that, except where specifically defined in the appended claims, the invention is not intended to be limited to the exact details the latter are to be considered as illustrative rather than restrictive of the invention.

Referring to the drawings, 1 designatesthe platen of a typew'riting machine and 2 a portion of the frame thereof to .which are pivotally connected key levers 3. These parts may be of ordinary construction and any suitable means, suchas a spring 4, ma)T be associated with each key lever to normally maintain it in the substantially horizontal position. represented in Figure 1.

As is usual, the type bars arepivotally connected to a suitable frame segment 6 and each type bar is connected with its corresponding key lever by means whereby' when theouter end of' the about its pivotal connection to bring the head thereof into printing relation with a ribbon and its associated key lever includes a lever -10 which is fulcrumed4 at an intermediate point of its length, as at 11, upon a fulcrum support 12 which is mounted to rock about a rod 13- suitably' supported in the machinel frame;

At its rear end the lever 1()y is connected bya link 14, with the type bar 5 and means are provided whereby when the forward end of the key or lever is depressed, the lever 10 will be rocked about its ulcrum 11 and, through the link 14, caused to move the type bar rearward and upward about its 'pivot into position to contact with the platen 1. As the pivotal connectionbetween the lever 10 and link 14 comes int-o substantial alignment with lever is depressed the typetbar will be swung upward and rearward form of mechanism,

shown in the drawings, and

the axes 11, 13, (and the connection between said link and type bar,) the movement of the bar will be temporarily checked. This will occurat a position of the parts inter- A straight line,

` mediate/of those illustrated in Figures 2 and lever 10y and link 14 forcing the type bar into printing relation with the platen, but without delivering a sharp or sudden blow in contacting therewith.

It. will be seen that that, portion of mem-k ber 12 between the pivots 11 and 13 constitutes a link portion swingable ina down- `ward and rearward direction to complete the stroke of the type bar 10, 14. The'free end or ber 12, being of some carry through of the link portion. y Figure 2 of thev drawing illustrates the position ofthe several of the downward stroke of the key lever, prior to the members 10, 14 of the toggle-like connection between the fulcrum support 12 and through the toggle tail portion -of memthe type bar coming into alignment or poswinging motion of the sition for checking type bar; and F igure,3 shows the position of the parts at the completion of the printing movement of the type bar, the fulcrum support 12 having been rocked about its axis, by power produced during the final portion of the depression of the fkey lever as will be hereinafter more particularly described.

In the embodiment of the invention illustrated, the key lever 3 is connected by a rod 15 with one arm of a bell crank lever 16 which is fulcrumed at 17 on a frame plate 18. The other arm of the bell crank lever 1G is, by a link 19, Hconnected to the lever 10 so that when the forward end of the keyy lever 3 is depressed, the lever 10 will be positively moved upward and rearward about its fulcrum 11 to carry the type bar 5 from the p'osition of rest, shown in Figure 1, toward the platen.

It will be seen that' the parts 116,` 19 constitute in effect a second toggle which acts to expand the initially collapsed primary toggle 10, 14 interposed between the type ca rrier and the fulcrum support 12. Y Movement of this additional toggle effects expansion of the primary type carrier actuating toggle and `assists in the completion of the printing stroke of the type carrier due to rocking of the fulcrum support l2.

In the embodiments of the'invention illus-fi;

trated the forward end of each lever 10 is connected by a rod 20 withy a lever 21 arranged beneath the key lever 3 and provided with a contact pad or cushion 22 vwith which the key lever contacts near the termination of its downward movement, so that said lever 21 is given a downward movement during the latter portion of each operation of the key lever. t

weight assists `in thev parts during a portion y mounted on the frame plate .ly described, to etlect a y lever 10 and link 14 to complete the travel of the type bar toward the platen, such contact occurring after the swinging movement of the type bar has been checked as before described, by reason of the substantial align- Y ment of the members of the toggle-like connection between the fulcrum support 12 and the type bar. This downward movement of the lever 21 is assisted somewhat ing or slightly weighting the rear free end of said lever, as at 23. The key lever 3 will, as above described, impart a blow to the level' 21 near the end of its movement which will carry the lever` 21 down and out of contact with the key lever.

The fulcrum support 12 above referred to, is connected by welding or other suitable means to one end of a leaf spring 30 which is suitably secured to a rod 3l of the machine frame and the bodily movement of the support 12 before referred to, acts to place this spring under slight tension which assists in returning the parts to normal position when pressure is removed from the key lever 3.

To insure that the fulcrum support 12 will not be bodily adjusted about its axis during the initial portion of the downward movement of a key lever and the consequent rearward swinging of a type bar, I preferably provide for positively holding'said support in its normal position and for automatically releasing said holdingr means as the parts come into position for checking the printing movement of the type bar.

As shown, a pawl or dog 33 is pivotally 18 and one arm thereof is normally held in engagement with a recess in the hub of the fulcrum support 12 b v the pressure of a short leaf spring 34. The other arm of the holding dog 33 extends into the path ofthe lever 10` whereby as this lever comes into substantial horizontal position. lor the position wherein rearward swinging movement Eof the type bar is checked'. said lever. 10, will Contact with and positively rock the pawl 33 abouty its pivot disengaging the fulcrum support 12 and permitting the llatter to be moved about its axis. as previouscompletion of the printing movement of the type bar.

A stop 18a may bei provided on tht` frame plate to limit upward movement of the bell crank lever 16 and movement of the toggle-like connection. provided by the lever l0 and link 14 between the key lever and type bar.

It will be understood that each key lever by enlargand its associated type bar are connected bv eral type actions being duplicates of each other. i

By the constructions so far described, it will be seen that the swinging movement of each type bar, effected by the depression of a key lever, will be checked prior to the type bar coming int-o printing relation with the platen and the continued depression of the key lever will effect a bodily rocking-of the fulcrum support 12 imparting a substantially straight line movement to the head of the type bar, completing thetravel of the ty-pe bar and bringing its head into printing relation with the platen. v

I-f, however, it is desi-red that the type bar should have a n continuous uninterrupted swinging movement from its position of rest to printing relation Awith the platen, means are provided whereby all of the fulcrum sup'- ports 12 may be simultaneously rocked so that the checking of the type bar movement, before described, will not occur.

As shown, a series of cams 50, one for each of the fulcrum supports 12, are mounted on a rod l51 suitably supported in the machine frame, each of said cams being adapted to engage the forward end of one of the fulcrum supports as the cam is rocked aboutl said rod 51.

The several cams are shown as being connected by a rod K2 and one of them is provided with a key or manually actuatable member 53. By depressing this key all of the cams l50'will be rocked and thereby all of the fulcrum supports 12 adj ustedA downward and forward about the axial rod 13, into the relation to the other parts shown in Figure l.

- vl/Vith the members 12 in the positions shown in Figure 4 there will be no checking of the rearward movement of each type bar, but the latter will have an uninterrupted movement from its position of, rest to printing relation to the platen whenever its corresponding key lever is depressed.

A pawl 55 is provided for engaging ynotches or eorrugations formed in one of the cams 'so that' when said cams are moved from the position shown 111 Figure 1 -to that i illustrated in Figure Ll, as above described,

they will all be turned to such adjusted relation.

A slight upward pull on the key or manually actuatable member 53 will disengage the pawl 55 and permit the cai'ns to be returned to normal operative position, the leaf springs 30 acting to etl'ecta corresponding movement of the fulcrum supports l2.

I claim:

1. In atypewriting machine, the combination of a platen. a type carrier movable to and from printing relation to the platen, a key lever, means controlled by actuation of f the key lever for positively moving the type carrier to printing position, including devices for normally checking such movement of the type carrier prior to its reaching printing position, and meansr for rendering said checking devices inoperative 'to cheek such movement.

2. In a typewriting machine, the combination of a platen, a type carrier movable to and from printing relation to the platen, a key lever, means controlled by actuation of the key lever for effecting initial movement. of the type carrier toward the platen, means for normally checking such movement of the type carrier. means actuated by movement of the key lever for effecting completion of the movement of the type carrier to printing relation to the platen, and means for rendering said checking means inoperative to check such movement.

3. In a typewriting machme, the combination of a platen, a plurality of type carriers each movable to and from printing relation rendering all of said checking means inoperative.

' 4. In a typewriting machine, the combination of a platen, a'type bar mounted to swing upward and rearward into printing relation to the platen, a key lever. means controlled by actuation of the key lever for moving the type bar to printing position, and including devices for normally checking such movement of the type bar prior to its reaching printing position, and means for rendering said checking devices inoperative to check such movement.

5. In a typewriting machine, -the combi- J nation of a platen, a type carrier movable to and from printing relation to the platen, a key lever, means controlled by actuation of the key lever for effecting movement of the type carrier to printing position, means'for checking such movement ofthe type carrier, prior to its reaching printing position, i11- cluding a pivotally mounted member connected to the type carrier, and meansfor adjustingsaid pivotally mounted member to render said checking means inoperative.

6. In a typewritingmachine. the combination of a platen, a pi'votall;7 mounted type bar adapt-ed to swingl upward and rearward into printing relation to the platen, a key lever, means controlled by the key lever for positively moving` the type bar to printing position, means for normallychecking such movement of the type bar prior to its reachmounted member about its' axis to render the d A' v1 3() checking means inoperative.

7. lln a .typewriting machine, the combination of a platen, a type carrier movable to and from printing relation to the platen, a key lever, connections between the key lever and the type carrier including means for checking movement of the carrier toward the platen prior to its reaching printing position and comprising a lever having one end connected with the type carrier, a pivotally mounted support for the last said lever, and means normally holding said fulcrum s uplport stationary, and being automatically ref leased to permit movement of the fulcrum support with the lever to carry the type carrier 'to printing position.

ln a typewriting machine, the combination of a platen, a type carrier movable to and from printing relation tothe platen, a key lever, connections between the key lever and the type carrier including means for checking movement of the carrier toward they posiplaten prior to its reaching printing tion and comprising a lever having one end connected with the ytype carrier,a pivotally ally mounted support for the last said lever, and a pawl engaging the tulcrum support and normally holding it stationary, the tail of the pawl extending into the path of movement of the last said lever, whereby the fulcrum support Will be automatically released and permitted to move with said lever to carry the type carrier'to printing position.

9. In a typewriting machine, the combination of a platen, a typecarrier movable to and from printing relation to the platen,

' a key lever, connections between the key lever and the type carrier including means for checking movement of the carrier toward the platen prior to its reaching printing position and comprising a lever having one end connected with `the typecarrier, a pivotally mounted support for the last said lever, means normally holding said fulcrum support stationary, and being automatically released to permit movement of the fulcrum support with the lever fulerumedtliereon to carry the type" carrier to'printing position, and manually adjustable means for rendering said' lioldingmeans inoperative.

10. In a typewriting machine, the combination of a platen, to and from printing relation to the platen, a key lever, connections between the key lever and the type carriei' includingl means for checking movement of the carrier toward the platen prio-r to its reaching printing position and comprising a lever fulcruniedi. at an intermediate point in its length, a pivotmounted fulcrum support for the last said lever, means normally holding said fulcrum support stationary, and being automatically released by the lever fulcrumed on said fulcrum support as the movement of the type carrier is cheeked, and means for rocking the' fulcrum support about its axis to Athe platen prior toits reaching printing a type carrier movableand from printing relation to the platen, a

key lever, connections between the key lever andthe type carrier including means for checking movement of the carrier toward the platen prior to its reaching printing position and comprising a lever ful'crumed at an intermediate point in its length, a pivotally mounted fulcrum support for the last said lever, means normally holding said fulcrumv support stationary, and being automatically releasedby the lever fulcrumed on said fulcrum support as the movement of the type carrier is checked, and supplemental means including a member for rocking the said fuleruni support' to effect completion of the movement to printing position of the type carrier.` l2. ln a typewriting machine, the combination of a platen, a type carrier movable to and from printing a key lever, connections between the key lever and the type carrier including means for checking movement of the carrier toward osition andcompri'sing a lever fulcrumeld at an intermediate point in its length, a pivotally mounted fulcrum support for the last said lever, extending beneath the key lever for positively rocking said fulcrum support to effeet completion of the movement to printing position of the type carrier. 13; In a typewriting machine, the combination of a platen, a type bar movable to and from printing relation to the platen, a key lever, connections between the key lever and the type bar including movement of the carrier toward the platen prior to its reaching printing position and comprising a lever fulcruined me iate point in itshlength,

ing beneath the key lever andadapted to be rocked thereby, andmeans for transmitting movement of said member to .the'pivotally mounted fulcrum support to bodily rock the printrelation to the platen,y

and means including a member f ico -O means for checking at an inte'ra pivotallymounted fulcrum support for the last saidy lever, a pivotally mounted rmember extend` ilo latter and effect completion of the movement i ofthe type bar to printing position.

14. ln a typevvriting machine, the combi-I nation of a platen, a type carrier movable to and from print-ing relation to the platen, a key lever, connections between the key level` and the. type carrier including means for checking movement of thecarrier toward the platen prior to its reachingprinting position and con'ipiisiiig a lever having one end connected with the type carrier, a pivotally mounted support for the last said lever, and manually operable means for bodily rocking said fulcrum "support to render the checking means inoperative.

'15. In a typewriting nation of a platen, a type carrier movable to and from printing relation to the platen, .a

means normally, holding said ulcrum sup-f` port stationary, and manually operable means for bodily rocking said fulcrum support to render the checking means inoperative.

16. In a typewriting machine, the combination of a platen, a type carrier movable to Y and from printing relation to the platen, a

key lever, connections-between the key leverand the type carrier including means for checking movement of the carrier toward the platen prior to its reaching printing position and comprising a lever having one end connected. with the type carrier, a pivotally mounted su'pportfor'the last said lever, manually operable means for bodily rocking said fulcrum support to render the checking means inoperative, and means for retaining the fulcrum support insuch adjusted position. f

17 In a typewriting machine, the combination of a platen, a series of pivotally mounted type bars which normally lie in a substantially horizontal position, a, series of key levers, one for each type bar, connections between each lever and one of the type bars for swinging the type bar into printing relation' to the platen when the key lever is actuated, an'd including devices for checking movement of each type bar prior to its coming into printing vrelation with the platen, and means for rendering inoperative the devices for normally checking movement of the type bars to printing relation with the platen. y

18. In a typewriting machine, the combination of a platen, a series of pivotally mounted type bars which normally lie in a substantially horizontal position, av series lof key levers, one for each type bar, connections betweeneach lever and one of the type bars for swinging the type bar into printing relavtion to the platen when the key lever is actuated, and including means for. checking movement of the type bar prior to its coming into printing relation to the platen, a rock shaft extending longitudinally of the platen above the key levers, and devices on said shaft for rendering all of said checking means inoperative when said shaft is rocked.

19. In a typewriting e nation of a platen, a type carrier movablev to and from printing relation to the platen, a

machine, the combimachine, the combi- 7means. controlled by actuation of keylever,

for positively moving the type the key lever carrier to printing position, means for normally checking'such movement of the type carrier prior to its reaching printing position, and said checking means inoperative.

20. In a typewriting machine, thecombination of a platen, a sees of pivotally mounted type bars, a series of key levers, one for each type bar, connections between each lever and one of the type bars for Swingin type bar into printing relation to the p aten when the vkey lever is depressed, and means adjustable by an operator whereby the moveneotions may be checked prior to the bar reaching printing relation to the platen vor the bar permitted to swing unmterruptedly from Iinactive position to printing relation to the platen independent of any varlation 1n the length of movement of the key levers.

and including means for rendering the ment of the type bars effected by. said conu ,'21.- Ina typewriting machine, the combiynation of a platen, a series of pivotally mounted type bars, a series of key levers, one

for each type bar, connections between each key lever and one of the type barsfor swinging the bar into 4printing relation to the platen when the key lever is depressed, and means for simultaneously effecting adjustment of the connections between all of the key leversf and associated type bars without moving the type bars whereby, at will, the operator may vary the type bars will strike the platen independently of any lvariation in the strokes of the key levers.

22., In a typewriter, a type an upward and rearwardroperative stroke, a toggle comprising two pivotally connected members of which one has a pivotal connecbar pivoted fon force with which the,

tion with the type bar, a swingable link portion having a pivotal connection with the other of said toggle memberssaid link porno tion being swingable downwardly from its normal position of rest and rearwardly, 'a key and operable to move the toggle members from a normally collapsed downwardly eze` tending position to a relatively straightened position and to imp-art to ,the type ybar through the toggle members a yterminally bar having a connection with said toggle checked throw to a position slightly in advance of striking position, and means external of said connection thereupon effective to swlng said link portion to complete the stroke4 of the type bar through said toggle.

In testimony whereof my hand. v CARL A. J OERISSEN.

I have hereunto set i iso

Images