US1460848A - Typewriting machine - Google Patents

Description

July 3,- 1923. 1,460,848

E. E, NESS TYPEWRI TING MAGHNE Filed Sebi. 2l. 1921 ITT Patented July 3, 1923. y

Nwuren STATES Par-ENT TYFEVRITING MACHINE.

To c//ZZ fw Imm t ma?) concern.'

Re it known that I, EDWARD B. Hass, a citizen ejl'i the United States, residing at Manhattan Beaclnin the county of Kings, New York, and. State ot New York, have invented.certainy new and use'tul improvements in TypewritingMachines, ot which the following' is a specification.`

This invention relates particularly to type actions 'for typewriting machines, and especially to that class oit" type actions in which the type bars are actuated by the key levers through otl1e1:"levers interposed between thc key levers and the type bars, and operatively connected therewith. ln one 'form oit such type actions, the interposed levers are in the form ol bell cranks ortwo-arm levers and they are connected with the rear portions ot the key levers and with the rear ends `or heels of the type bars, there being' a slot and pin connection between some"oit` the parts to permit oi thc proper movement/ot` the type bars relatively to the key levers. My present iinprovements are preferably applied tothe kind oil? type actions in which the rear ends oi" the type bars are prolonged rearwardly beyond their pivots and slotted to receive pins carried by the interposed levers. lleretoi'ore the operation ot such mechanism was snch that when the key levers `were depressed-` the type bars were moved rapidly from positions et rest directly andwithoiit interruption to the print-- ing point on the platen, and in such machines the type bars strike the platen with considerable 'torce andA objectionable noise is produced which by my invention is greatly decreased.

' which operate directly `upon the universal.

In my United States Patent No. 1,390,- 708 of Sept; 13, 1921, I have shown type actions in which provision is made 'For reducing the noise ol the impact oit Athe type bars on the platenand, therefore, I `dofnot herein claim broadly type aetions which are so constructed as to'reduce such noises, but according to my present invention, such broader invention isladapted to mechanism ot somewhat diiiferent construction from that shown .in my before mentioned. patent.`

In machines of the character betere describedyit is common to act-nate the escapement mechanism directly by the type bars` i bar meclianisln while the type arms are being moved rapidly toward the platen. Ac.-

Application filed September 21, 19,21. Serial No. 502,213.

coi-dino` te one part of my present inventw tion, the es :apement is `not operated during the initial movement of the typebars, nor while they are operating at high speed, but is operated during the latter part the movement o'l the type bars duringv what is called in my prior patent the momentum period, it being understood that the type bars are moved by a, full depression ott the keys to a point in advance of the platen, the further movement ojtthe type bars to the platen being caused by the momentum ci? the `type` bars. l llhe manner in vwhich provision is made for reducingnoise will be hereinafter more fully explained, but brieliy stated the levers which are interposed between the key levers and the type bars are connected with type hars by slot and pin connections and with the key levers by links or similar. members in such ot the operatorieI usually on the key and the key makes a slight returny movement which is resisted bythe finger of' the operator. When the `key is 'further depressed, certain parts oi. the mechanism .interposed between the key lever and the type bar assume a dead center or togglelocking position which" is an importantteature oit the construction. My present invention` involves also certain teatureso'l construction whereby the interposed levers are supported in a new way, and italso involves certain features et construction for supporting and operating; the universal bar andescapement mechanism. These will be hereinafter plained. i

ln the accompanying: drawingsz- .4 Figure l is a view largely diagrammatic of portions oia` typewritingmachine einymanner that by the itull depression a key, i -Jthe associated type bar is moved only toa depression of an associated 4key tion shownindotted lines at of theflink are in afstraightrline with the pivot of an interposed lever. Thisfigure of the drawings also shows how the heel ot a .type bar makes contact with a universal bar at the commencement of the momentum period.

Figure 3 is a view similar to Figure 2 showing the position of the mechanism after the parts have passeddead center position and it alsov shows that the universal bar mechanism has been moved rearwardly.

In Figure l ofthe drawings, parts of a typewriter carriage are indicated at A, and B indicates a laten. C indicatesa type bar segment and liga type bar guide. Escapement mechanism is indicated at F, a key lever at G, and atype bar at H. The type bars normally lie horizontally, their rear ends being pivoted to the segment at c and their front ends being supported by a cushioned restI. The rear ends of the key levers are pivoted at to a support J and the upward movement of thel front portions ot the key levers isv arrested by a cushioned stolp ach type bar H is formed with a rearwardly extending, downwardly inclined slotted arm 72, which is connected to a lever L by a slot and pin connection. i

Each lever L is pivotally mounted on a stationary support M, and each of these levers comprises a short armextending forwardly from. its pivot and a long arm extending upwardly and rearwardly from its pivot. A frame N is pivotally connected at m'with the support M and its position may be adjusted on the support by an adjusting screw O. Each lever L is pulled rearwardly above its pivot by a spring n attached `to the frame N ,and eachkey lever G is connected with the frame N by a spring g. Bv

rmeans of the set screw O which adjusts the frame N, the tension of the springs -u and' f/ may be simultaneously varied. i

y ,The short arm of each lever L is connected Abv a link P with an associated key lever. The connections at 1/,y"are pivotal to allow the necessaryfreedom of movement. Normally the key levers and type bars lie in a substantially .horizontal position and are practically parallel with each other and at this time the links P are inclined rearwardly aSA shown in Figure l. When in normal position, the connections between the links Pand thelevers L are such that when the Ikeys are depressed, a .direct pull is effectedpnf.the'levers which rapidly moves ,-.them,'their yupper ends being swung tor'- ward and by mea-ns'of'the slot and pin con- .nectionf describedandf clearly shown in the dlrawingsVeach lever is moved by the full to the posiy X, Figure 1. At this time, the pin on the ylever L is near the inner lend of the slot in the heel of the type bar, as shown in Figure 2, and also by dotted lines in Figure l. This is the full movement given to the type bar by the soci-ated key, but the momentum of the type bar carries it to the printing point indicated at Z in Figure l. In this way the noise of the impact is greatly reduced and blurring ot the print is prevented. It will Ibe observed by reference to Figure fi, that during the momentum period the pin oi the lever L moves outwardly in the slotted arm of the type bar, and it will be (')hservcd in Figure 3 that the pivot points l, 1/ and y have been moved from their dead center position.

The escapement mechanism F is similar to that employed in the Royal standard machine. A slight modification is shown at U. The device there shown is for the purpose of restoring the rocker plate to position. It comprises a screw u operating in a tapped opening in the escapement frame U and having a reduced portion n extending through the rocker plate 'il/2. The front end of thepart u carries a collar ua and another collar n4 is carried by the part u next the rockerplate. A spring n is interposed be.- tween the two collars. At its rear end, the screw u carries a lock nut u". By means oft the screw the tension ot the spring fui may be varied. The spring serves to restore the rocker plate to position after its operation.

.The rocker plate carries a spring arm f equipped with a roller f and the'position ot the roller f on the rocker plate may be adjusted by a screw f2.

The universal bar mechanism comprises a frame Q carrying at its front end a semicircular member (I and a guide finger ff which extends through the segment (l. This frame is supported by an arm s which is pivotally connected with the frame at e and it is connected to an arm V rigidly secured to a stationary rod S. This arm carries an eccentric s2 whichis adjustable and the onteiend of the arm V is connected with the arni s by a spring s3. By these devices the relation of the universal bar mechanism to the escapement mechanism may he adjusted.. The frame Q has a downwardly extending arm r which makes contact with the roller f of the escapement. This contact is maintained at all times andthe arm is of sufficient length to permit the carriage with the escape/ment mechanism to be raised and lowered for case printing. contact between thev roller f and the arm r being maintained at all times.

The relation of the universal bar mechai nism with the type bars and with theescapement mechanism is such that while the universal bar mechanism is in contact with riod and actuate the universal bar only during` the momentum period. The cam sur- `faces oli the type bars come gradually into contact with the universal` bar and inasmuch as the universal bar is always in contact with the escapement mechanism, a source of noise incident to other constructions is eliminated. i

l claim` as my invention: i

1. .In a typewriting machine, the combination with the key levers and the type'bars, of connections interposed between the rear portions ol the key levers `and the rear portions .of the type bars, said connections each. comprising a sub-lever operatively connected with a rearwardly extending portion oit the type bar, said sublever being` mountedto move` about `an axis .in the rear ot the; type har pivot and having` a toggle link connection: with the rear portion ot a key lever which moved into toggle lockingr connection by the t'ullv depression of' a key lever, the type bar then being at a distance from the platen and completing its movement by .its own momentum.

`2. In a typewritingr machine, the combination withthe key levers and the type bars,

ot connections betweenl the key levers and the type bars, said connections each comprisinga lever pivotally mounted inv the rear ci the type bar pivot and having pin and slot connection with a type bar and a llink connection with the key lever, the parts beine; arranged so that atull depression ot the key lever causes a dead center relation. tl'ierebetwcen with the type bar at a distance 'trom the platen from wl i it `completes its travel by its own inomentum, thereby reducin noise.

ln a typewritingmachine, the combination with the key levers and the type bars, oit two armed levers `mounted in the rear of and below the type bar pivots, each oit said levers having" a lone ar1n` with` a pin and slot connection with its type bar in the rear of the type bar pivot, and a shorter arm having; alink connection with its key lever, a tull depression of the key moving,T the link connection into a dead center position with the type bar at a distance from the platen from which it completes its travel by its own momentum, thereby reducing; noise.

1t. ln a typewriting` machine, the combination with the key levers and the type bars, of two-armed levers mounted in the rear oit the type bar pivots, each lever having' a long arm with a pin and slot connection with its type bar, and an arm having a link connection with` the key lever, a tull depression ol the key lever moving the parts to a position in which the ends of the link and the pivot ot the two-armed lever lie in a straight line while the type bar is at a distance from the platen troni which it cornpletes its `travel by its own momentum, thereby reducing noise.

5. In a typewriting machine, the combination with the key levers and the type bars, oli'. interposed sub-levers, springs for returning the key levers to normal position,

`springs tor returning the` sub-levers to normal position, and means for simultaneously adjusting both series oit springs.

6. In a typewriting machine, the combination with the key levers and the type bars, ot two-armed `levers having link connections with the key levers and slot and pin connections with the type bars, a support for said two-aiimed levers, a 'trame pivotally connected with said` support, means for adjusting` the iframe on said support, and springs connectine'the frame with the key levers and with the two-armed levers.

7. ln a typewritine machine, the combination with the key levers and the type bars, ot connections comprising interposed levers, a support Vtor said interposed. levers, springs tor returning the interposed levers to normal position, springs tor returniiip' the key levers to normal position, and means adjustably mounted on said support 'lier simuling,Y the position oi the universal bar rela` tively to the escapement mechanism.

9. ln a typewriting; machine, the combination o'l type bars, a universal bar operated. by the heels of the type bars, a support for said universal. bar, escapement mechanism with which the universal bar has constant engagement, a stationary member independent of said supporting means, and an eccentric carried 'thereby and adjustable to vary the position of the universal bar relatively to the heels of' the type bars and to the escapement mechanism.

l0. In a typewritinggmachine, the combination with lthe key levers and the type bars, of connections between the key levers and the type bars, said connections each comprising alever pivotally mounted in the rear of the type bar pivot and having' pin and slot connection with a type bar and a link connection with the key lever, the parts being arranged so that a full depression ot the key lever causes a dead center relation therebetween with the type bar at a distance from the platen, escapement mechanism, and universal bar mechanism engaged by the type bars only when the parts have reached said line with the type bar at a distance from 15 dead ce-nter relation and operated by the type -bars during their momentum movement to printing position. p

ll. In a typewriting machine, the combination With the key levers and the type bars, ottWo-armed levers mounted in the rear of the typebar pivots, each lever having a long arm with a pin and slot connection with its type bara-nd an arm having, a link connection with the key lever, al full depression of the key levermoving thel parts to a position in which the ends of the link and the pivot of two armed lever lie in a straight the plate, escapement mechanism, and universal bar mechanism operating the same and engaged by the type bars only at the end of a full depression ci the key lever and operating the escapement mechanism during the momentum movement of the type bars. 12. In a typewriting machine, the combination withthe key levers and the type bars, of levers interposed between the rear portions of the key levers and the rear portions of the type `bars which are operatively connected with the type bars and have linked connections with the key levers in front of their pivots,`the points of connection of each lever and link being lso related vtothe type bar and key lever that a full depression of the key lever causes thetype bar to move va considerable distance from the platen and to complete its movement by its own momerb turn. Q13. Inl a ytypewriting machine, the combination with the key levers and the type bars, both of which lie in horizontal planes, of substantially vertical connections interposed between the type 'bars and the key levers, said connections each including a sub-lever mounted to turn about an axis in the rear 'of the type bar pivot and having one arm operatively connected to the type bar, and a toggle link connection between the subleverand the key lever Which is moved into toggle locking position by the full depression of a key lever, the type bar then being at a distance from the platen and completing its movement by its own momentum.

' 14. In a typewriting machine, the combination With the key levers and the type bars, both oi which lie in substantially horizontal planes, of intermediate connections which lie in a Substantially vertical plane and each of which comprises a sub-lever pivotally mounted in the rear of the type bar pivot and having its longer arm connected to a rearwardly extending portion of the type bar, and a toggle link which connects the sub-lever and key lever and is moved into toggle locking relation thereto by a full depression of the key lever, the type bar then being at a distance from the platen and completing its movement by its own momentum.

15. In a visible writing machine, the combination with key levers Whose free ends are toward the front of the machine and type bars whose free ends lie toward the front of the machine, of intermediate connections comprising a two-armed lever, a pin and slot 'connection between the long arm of the twoarmed lever and the heel of the type bnr and a link operatively connecting'the short arm of the two-armed lever and the key lever intermediate its length, a full depression of the key lever moving the arts to a )osition in which the link and t 1e pivot oi the two-armed lever lie in a straight line, the

Vtype bar then being at a distance from the platen and completing its movement by its own momentum.

In testimony whereof, I have hereunto subscribed my name.

EDWARD B. HESS.

Images