US2182150A - Typewriting and like machine - Google Patents

Description

Dec. 5, 1939. H. A. HEINRICH TYPEWRITING AND LIKE MACHINE Filed Aug. 25, 1937 gl v w c nio/n HENRY/1. HE//vR/CH @Non 11445 Patented Dec. 5, 1939 L18-A56 TYPEWRITING AND LIKE MACHINE- Henry A. Heinrich, Middletown, Conn., assignor te Remington Rand Inc., Buffalo, N. Y., a corporation of Delaware Application August 25, 1937, Serial No. 160,863 s claims. (o1. 19V-s2) My invention relates to typewriting and like restricted to embodiment in such machines as machines, and more particularly to improvethose indicated above but may be employed in ments in the carriage. escapementrnechanism oi various other types of typewriting and like masuch machines. chines wherever found available.

One of the main objects of my invention, gen- I have shown in the accompanying drawing f5 erally stated, is to provide improved, highly eflilonly so much of the usual construction of the No. cient and reliable carriage feed meehanism.y l0 Remington Neiseless machine as iS necessary Another object of my invention is to provide t0 arrive et a Complete Understanding 0f my nimproved connecting means between the carvention in its embodiment therein.

10, riage and the escapement wheel in a machine of In Fig. 1 e pOrtiOn 5 0f the usual erOSS member 10 the type wherein the carriage in its entirety has a Of the machine frame iS ShOWIl aS SUDDOrtng the case shifting movement relative to the escapecese Shifting rock shaft e by upstandng bearing ment wheel. lugs "i in the usual manner. The usual case .Afurther Object of my invention more Specifshiftable member or guide rail 3 has attached f-cally stated is to provide a connecting means of thereto depending brackets 9 WhCh ere DVOed 15 the character specified that prevents the creation at il! to spaced arms l l carried by the rock shaft of back lash or lost motion between the carriage 6. The member 3 iS guided by lChe llSllal means,

feed shaft or pinion and the eseapement wheel, not shown, for substantially vertical case shiftthereby overcoming the'diiculties ordinarily preing movement Which iS effected by rocking th sented dueto such back lash. f Shaft 6. 2

To the above and other ends which will herein- The Shaft S rOCked fOr CaSe Shifting by the after appear, my invention consists in the feausual mechanism, Only a FIOrOIll 0f Which iS tures of construction, arrangements of parts and herein ShOWrl 21S including links Ii2 COIlIleCted t0 combinations of devices set forth in the following an arm i3 adjustably mounted on a forward eX- 25 description and particularlypointed out in the tension i4 Of 011e .0f the rOCk Shaft arms A 25 appended claims. toggle action is given the links l2 which rocks In the drawingswherein like reference charthe shaft 6 in an anti-clockwise direction as acters designate corresponding parts in the dif- Viewed in Fig. l t0 raise the member 3 t0 upper ferent viewscase position shown in dotted lines in Fig. 1, The

Fig. lis an enlarged, fragmentary', vertical secupper case position of the various shifted parts 30 tional view of the carriage escapement mechaiS limited by an adjustable $17010 SCreW l5 Carried nism and a portion of the case shifting mechaby the arm i3 andengageeble With the heed H nism of a No.1() Remington Noiseless typewriting of a screw threaded into the Cross member 5. machine equippedV with the devices of my'nven- The lower case position is limited by the usual tion. stop mechanism which has not been shown.

Fig. 2 is an enlarged fragmentary horizontal The carriage of the present machine has not sectional view taken on line ii- 2 of Fig. l and been shown in full but may be of the usual conviewed in the direction of the arrows at said line. struction and includes the main support 2D prolFig. 3 is an enlarged detail plan view of a part vided with oppositely disposed grooved tracks or 40,; of the construction shown in Figs. l and 2. raceways 2te. The carriage member Z@ is mount- My invention is in the naturerof an improveed between oppositely disposed channels or tracks ment on the carriage feeding mechanism of the in the `CaSe Shfteble member 3 by CrOSSed ant- No. 10 Remington Noiseless typewriting machine friction rollers 23 for longitudinal carriage feed or generally on the type of carriage feeding movement in the usual manner.l The carriage 4K5VA mechanism disclosed in Patent No. 1,219,213 to thus mounted is impelled in a letterv space feed 45 N. H. Anderson dated March i3, 191'?. direction by the usual spring drum, not shown.

The present invention, however, is likewise ap- The carriage movement in the letter Space feed plicable to the No.6 Remington Noiseless madirection is controlled by the usual form of chine and to the No. 1l Remington machine. escapement devices including a releasable feed 5p I have shown my invention embodied, in the rack 25 pivctally mounted on the carriage mem- 50 present instance, in a No. l0 Remington Noiseless ber 2S to normally engage a -feed pinion 26 machine in which the features of the present infixedly secured at the upper end of a substantially vention may be readily incorporated with but vertically disposed feed shaft 2. `This feed shaft few changes in the existing structure. However, is rotatively supported in place by a ball and 5,5.; it is to be understood that `my invention is not socketv bearing 28, pivoted at 28a to a bracket 55 tical alignment.

arm xed to the case shiftable member 8 to be carried therewith in the case shifting movements of the latter.

Although for convenience, the parts in the present construction are shown in the drawing as disposed so that the feed shaft 2l for example appearsvertical, it is to be understood that actually these parts are so mounted in the No. l0 Remington Noiseless and the No. ll Remington machines that the feed shaft has approximately a ten degree fore and aft displacement from a ver- However, for the purposes of the present invention, it is merely necessary to understand that the case shifting movement of the carriage is substantially parallel or in lin with the axis of the feed shaft.

' and dog rocker assembly which controls the roof the hub 3l coacts with the under side of the tative movement of feed shaft 2'! may be of the usual construction employed in No. 10 Remington Noiseless machines to afford letter spacing movements of the lcarriage under the force of the usual carriage spring drum. Thus, the escapement wheel designated as a whole by the reference numeral 3B is provided with anenlarged' centrally disposed opening through which the lower end portionl of the feed shaft 2l freely passes. A reduced diameter upper hub portion 3i of the escapement wheel is received in a bearing opening in an arm 3?.a of an l.shaped bracket 32 which is rigidly attached at 33 to a cross member 34 of the machine frame. The escapement wheel 30 is mounted for rotation in the bearing opening in the bracket arm @Zaand is retained against downward vertical displacement by the usual tabulator brake drum 35 threaded upon a further reduced upper end portion 35 of the hub 3l and overlying the adjacent portion of the bracket arm 32a. The shouldered portion :ila

bracket arm 32a to prevent upward displacement of the escapement wheel.

The dog rocker assembly designated as a whole by the reference numeral i0 comprises, in the A present instance, the usual dog rocker di (see Fig.

2) having down turned lateral end portions recessed to receive coned ends of pivot screws 42 carried by respective spaced arms d3 extending rearwardly and downwardly from the bracket 32. A forwardly extending arm 44 of the dog rocker 4i carries on the upper side thereof a holding dog 45 mounted thereon at 46 and biased to its normal position by a spring l1 to engage teeth 5B on the escapement wheel 35. The holding dog l5 is also mounted for a slight sliding movement against the force of a spring 48. A stepping dog 5| which is normally out of engagement with the teeth 5u is pivoted at 52 on the lower side of the arm dil to receive a movement against the force of the same spring li'l that is also connected to the holding dog 45. The movement of the stepping dog 5i against the force of the spring 41.

is limited by a stop arm 53 adjustably mounted at 5d in a rearward extending arm 55 of the dog rocker 4| and having its forward end entering a bifurcation (not shown) in the tail of stepping dog 5l. i

The dog rocker is biased to its normal position by the usual spring 55 to engage a stop screw 51 with the edge of the associated bracket arm 43and thereby limit the return movement of the dog rocker to normal position. The dog rocker lll is rocked about the pivot screws 42 upon the actuation of any of the printing keys or the space bar through the usual means which have not been shown.

While I have described in detail the escapement wheel, coacting feed dogs, dog rocker, etc., employed in the present instance,y it should be understood that so far as the present invention is concerned, any suitable devices may be employed in lieu of these parts.

It will now be clear that in an arrangement of the present type wherein the entire carriage Vreceives a case shifting movement, the escapement wheel 30 must be connected to rotate with the feed shaft 21 and pinion 26 but, nevertheless, provision must be made to maintain the feed pinion at all times in cooperative relation with the feed rack. This is attained in the present instance by affording longitudinal ror axial case shifting movement of the feed shaft and feed pinion relative to the escapement wheel. In the construction ordinarily employed in said Remington Noiseless machines, the connection to attainy these ends is provided for by oppositely disposed longitudinal ways or grooves -iin the feed shaft receiving anti-friction bearing balls carried in companion oppositely disposed grooves or lWays in the Wall of a centrally located opening in the escapement wheel. A somewhat rsimilar connection is also disclosed in the previously mentioned Patent No. 1,219,213.

In such constructions, it will be clear that the point of connection between the feed shaft and the escapement wheel is Very close to the center or axis of the feed shaft, and accordingly any looseness or clearance ordinarily encountered in manufacture of these connecting parts are created by wear thereon in the use of the machine is multiplied several times at the teeth o-f the escapement wheel. In other words, the clearancev ment wheel, the relative rotative movement of theA connected parts is considerably multiplied.'

It has been foundin practice that when the point of connection between the parts is provided near the axis of the feed shaft as in said prior constructions the extent of relative rotative movement is sufficient to at times cause considerable diiculty in the operation of the machine. difficulty arises particularly during rapid operation of the machine when the back lash afforded during the free movement of the escapement wheel allows it to get out of time with the oscillating up and down movement of the dog rocker. This may cause a piling of one printed character upon another as an escapement ydog may move up and down in the same interdental space of the escapement wheel instead of affording a complete letter space movement of the wheel. It has' This It is the main purpose of my invention to provide a connecting means between the feed pinion, orfeed shaft 21, and the escapement wheel 39 which will overcome these and other difficulties encountered by the prior connecting means. Generally stated, I overcome these difficulties with the aid of connecting means by which the feed shaft is connected to the escapement wheel at points which are spaced a suflicient distance from the axis of the feed shaft so that there can be little or no lost motion between the shaft and wheel and any such lost motion as may occur is not multiplied at the teeth of the escapement wheel and is not appreciable at such point. I also provide such a connecting means wherein the wear resulting from case shifting is distributed over an increased number of points, thereby reducing the extent of relative movement resulting from such wear.

The connecting means of my invention thus comprises in the present instance a plurality of connections between the feed shaft and the escapement wheel, which connections are spaced outwardly a substantial distance from the axis of the feed shaft and escapement wheel. In the form of my invention shown in the present instance there are three pivoted connecting links 6B, connecting a substantially triangular bracket or member S2 operatively connected to the escapement wheel 3i! with a similar bracket or member 64 operatively connected with the feed shaft 21.

The bracekt 62 is xedly secured to the lower side of the escapement wheel by three headed screws B5 the stems of which pass through openings in the bracket and are threaded into tapped openings in the escapement wheel. The bracket 64 is retained against a flange of a hub 66 by a lower end portion of the hub passing through a central opening in the bracket 64 and having its lower end riveted to the bracket. The hub 66 is secured to the lower end of the feed shaft 21 by a set screw 1!) threaded through the hub and bearing at its inner end against a flat portion of the shaft. This facilitates an assembly of the parts and provides for effecting a proper adjustment of the member 64 on the shaft 21.

One end of each of the links 60 is pivotally connected to the bracket 82 by a headed pvot pin.

12 riveted to an associated lug 13 which extends downward from one corner of the bracket 62. 'Ihe other end of each of the links 60 is pivotally connected to the bracket 64 by a headed pivot pin 1li riveted to an associated lug 15 which extends upward from one corner of the bracket Eli. The lugs 13 and 15 on the brackets 62 and Gli respectively are so arranged that the links Si) are all equally spaced at equal and at considerable distances from the axis of the feed shaft and escapement wheel, the actual points of connection of the links being beyond the perimeter of the escapement wheel. Therefore, any slight wear that may take place at the pivots of the links 60 will hardly be appreciable in the creation of back lash between the escapement wheel and the shaft 21.

Referring to Fig. l, it will be seen that the hub 66 is positioned longitudinally o-n the feed shaft 21 so that the end of each of the links t which is connected to the bracket t4 is lower than the end connected to the escapement wheel bracket E2. When the feed shaft 21 and bracket @t are shifted upwardly by the shifting movement of the carriage from its lower case to its upper case position, the pivot 1li of each of the links 60 is moved to a position which is substantially the same distance above the associated'l pivot 12; as it was below said pivot 12 before the shift took place, as will be seen from a comparison of the full and dotted line showing of the links til in Fig. l. With this arrangement, the links 60 are shifted equal distances beyond a central horizontally disposed position, and accordingly the escapement wheel will have the same rotative position relative to the feed shaft in either the upper or the lower case position. In other words, the links 60 are so arranged that no carriage movement in a letter space feed direction will beeffected or permitted by a case shifting movement of the carriage and no relative rotative movement between the escapement Wheel and shaft 21 can be effected in either the lower case or upper case position of the parts.

It will also be noted in Fig. 2 that there is a slight clearance between the sides of the links E@ and the heads of the pivots 12 and 15. This clearance will allow a slight twisting movement between the links and their pivots thus permitting a slight amount of lateral movement 0f the feed shaft 21 on its ball and socket support 28 at pivots 23a at the upper end of the shaft and relative to the escapement wheel 3U, This feature of the present arrangement allows rotary motion to be freely transmitted from the feed shaft to the escapement wheel regardless of any change in axial alignment of ther feed shaft which may be brought about by case shifting if the carriage shift member or rail 8 is not shifted exactly parallel with the axis of the feed shaft.

It will be seen that I have thus provided a simple and highly effective means for operatively connecting the feed pinion and the escapement wheel in a machine wherein the carriage in its entirety has a case shifting movement Vrelative to the escapement wheel and the feed pinion is shifted with thecarriage. In the specinc form shown herein, the feed shaft is connected to the escapement wheel by pivoted links wherein the connecting pivot points are located outside the periphery'of the escapement wheel. Thus, the extent of any lost motion that may occur at these pivots is not multiplied at the teeth of the escapement wheel and accordingly only a very slight extent of relative rotative motion can in any event be afforded between the teeth of the escapement wheel and the feed shaft.

In other words, I have provided a connecting means whereby the rotative back lash or lost motion between the escapement wheel and shaft that sometimes occurs in prior structures is substantially eliminated or reduced sufficiently to eliminate an improper carriage feed and also to eliminate or materially reduce any noise that may ordinarily occur in the operation of the escapement mechanism due to such back lash. It also will be clear that in my connecting means, any wear resulting from operation will be distributed, in the present instance over six points at the pivots 12, 14, which together with the arrangement of the points of wear at a substantial distance frorn the axis of the feed shaft, reduce to a minimum any back lash that can take place in the connection and prevents any appreciable back lash from developing'due to wear in the continued use of the machine.

Although I have shown and described the con- Jnecting means of my invention as located beat any point between the case shiftable feed pinion 26 and the escapement Wheel and the same results Will be attained.

Various changes may be made in the construction, and certain features thereof may be omitted Without departing from my invention as it is defined in the accompanying claims.

What I claim as new and desire to secure by Letters Patent is:

1. The combination of a carriage mounted for case shifting movement, and escapement mechanism therefor including a feed shaft connected for rotative movement by letter spacing movements of said carriage and for axial movement by case shifting movements of said carriage, an escapement Wheel mounted for rotative movement only, and means connecting said escapement Wheel for rotation with said feed shaft but affording axial movements of the feed shaft relative to the escapement Wheel, said means including a plurality of connecting links extending transversely of said shaft and each pivotally connected to said feed shaft and to the escapement Wheel to cause them to turn together and also to afford an independent axial movement of the shaft, and operative substantially at equal distances each side of a transverse position in either case position of said feed shaft.

2. The combination of a carriage, a case shiftable member and escapement mechanism for the carriage including an escapement Wheel and a rotative feed device that turns as thec'arriage receives an intermittent letter space movement and has a relative axial movement during the case shifting movement `of said case shiftable member, and connections substantially outside the periphery of lsaid escapement Wheel for connecting the escapement Wheel and said rotative feed device to turn together but aording relative axial movements of the latter relatively to the escapement Wheel, Said connections including pivoted links arranged to 4operate substantially equal distances each side of a position aligning transversely o-f the axis of said rotative feed device during the case shifting movements thereof.A

3*. The combination of a carriage, a case shiftable member and escapement mechanism for the carriage including an escapement Wheel and a rotative feed device that turns as the carriage receives an intermittent letter-space movement and has a relative axial movement duringthe case shift movement of said shiftable member, and means connecting the escapement wheel and said rotative feed device to turn together but affording axial movements of the latter relative to the escapement Wheel, said means including a connecting member arranged to opierate during the case shifting movement substantially equal distances each side of a position extending at right angles to the axis of said rotative feed device.v

HENRY A. HEINRICH.

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