US1636129A - Typewriting machine - Google Patents

Description

July 1927 s. G. some TYPEWRITING MACHINE Filed Jan. 14. 1925 INVENTOR ATTORNEY Patented mm, 1927. a

'. UNITED STATES P TENT OFFICE.

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TYPEWBITDIG MACHINE.

Application m January 14,1025. Serial Io. 3,422,,

My invention relates to paper feeding and controlling mechanism for typewriting machines, and its chief object is to provide a new and improved paper bail for such machines.

To the above and other ends which will hereinafter appear, my invention -'consists in.

the features of construction, combinations of devices, and arrangements of parts'hereinafter described and particularly pointed out ing machine,

in the claims.

In the accompanying drawings which illustrate the. preferred form of my invention as applied to a No. 6 noiseless typewrits Figure 1 is a fragmentary end view partly in section showing the carriage of said machine with my invention applied thereto.

Figure 2 is a view corresponding to Fig.

$ 1 but omitting some of the partsshown therein and illustrating the bail in its forward or abnormal position.

Figure 3 is a fragmentary front elevation of the carriage wit my invention applied thereto, parts being shown in section.

' tiona view of'one of t Fi re 4 is an enlarged longitudinal sece bail pressure-rolls and its-mounting-i a;

Figure-5 is a gmentary view illustratj" ing one of the pressure rolls of thebail in contact withtherplgteg.

Figure 6 is a fragmentary iiiiviw 'illus trating the bail bar resting on its stationary support.

appearsvfroinjigs. 1 and 2 of the drawin the traveling-platen carriage of the mac ine comprises'a cross bar 1 grooved at its. front and rear faces and having end bars 2 secured to its ends, said end bars beformed with rearward extensions 3 which are connected or tied together by a cross bar 4 that is preferably toothed atits top and bottom edges andser resasa cohnnn 1+ stO barKGfie'KfTthe column sto s o-bein e groovedcarriage bar 1 co-operates throu h antifricsshown mounted on saidbar 4.

tion rollers. 6'with' an opposite y grooved trough or -track member 7 secured to the.

frame of the machine. Said frame inclii'des -a top p'late8 having. short upstanding portions9 onwhich is'sc rewedor otherwlse sev .curedaguidegmjemben 1 0 for the typebass,

whic mt herein shown. The

are, adaptedftohe! moved rearwar at the to with the, front 'with inwardly projecting hub .1: bars 21 and 22 are so confined between the proface of a rotary platen. 11 having axle rtions 12 which bear on the end bars 2. e type bars co-operate with a center guide '13 which is secured by screws 14 to the top plate 8 and extendsupward at the front side .0 of the platen. It is to be understood that the partsheretofore described are not claimed herein since they are not per se a part of the present invention.

The left-hand and right-hand end bars are formed or provided.v withintegral extensions numbered res ctively 2" and 2", these extensions projecting upward and forward, and terminating above and well in front of the platen. Their terminations. or 7 end portions receive shouldered screws 15 g which serve as pivots for my new and im* proved paperbail.

Said paper 'bailcomprises crank arms or side arms 16 which are pivoted on the shouldered portions of the screw 15 and at their free-ends are formed ortions 17 which are perforated to receive t e-end portions of a cross bar 18, said cross bar bein square orrectangular in cross section an fitting into the hubs 17, bein secured in rigid relation with the arms 16 y set screws 19 which are threaded into the hubs 17 and abut against the bar 18. There is thus provided a rigid frame or bail member 16-18. Adjustably mounted on the bar 18 are a plu-v rality of pressure rolls '20, two of said rolls bei g empl yed in the Present instance; t;

best. shown in Fi 4, each roll comprisesv a pair ofconoentnc sleeves 21 and 22, onefitting rotatably upon the other. Fitted on. the outer sleeve 21 is a sheath or covering 23' of rubber or suitable composition. The I v I pressure roll is maintained -in-adjusted i position along the, bar 18 by a friction spring device which preferably is in theform of a flat spring. 2*Larran ged inside the innerfilaevewl Th spring is sligbflywwgg'f curved or bowed and its inherent tension is m such that it tends to p; essth"e contiguous portions of the bar wnd the sleeve apart,

sufiicient friction being caused thereby to prevent afccidental movement of the pres- 2 sure roll device 20 lengthwise ofthe bar 18. The end portions 25 of the spring24. r'o- 'ect outsidejthe sleeves and are vturn .or

nt outwardly at right angles, being ,of suflicient length to extend beyond the per phcry of the outer sleeve 21." Thetwo sleeves I jections 25 that endwise relative displacement of the sleeves is prevented, although the outer sleeve may turn freely on'the inner sleeve to afford relative turning movement between the pressure roll and the laten. In other words, when the platen is turned to feed the paper, the sleeves 21 with their sheaths 23 turn on the sleeves 22 which remain stationary on the bail. When the bail comprising the cross rod or bar 18 and the end portions or crank aims 16'isheaded shouldered screws 27 that are threaded into bosses or enlargements 2 on the inner faces of the end bars 2. The latch devices 26 are vertically disposed, the portionof-each latch above its pivot 27 being formed with a slot or cut-out indicated at 28 which engages and cooperates with the bail to retain it in operative position. Preferably the ing said latches back against their springs slots 28 co-operate with the end portions of fully to clear the surface of the pulling the cross bar or either 0 the bar 18 and directly with the enlarge- 'ments or hubs 17. Below its pivot 27 each latch is formed with a tail portion 26 to which is attached the forward end of a draw spring 29, each draw spring being anchored at the rear end to a pin 30 projecting laterally inward' from the end bar 2. The spring 29- constantly presses the up er portion of the latch forward and normally maintains it in locking engagement with the bail. A stop pin 31 projecting inward from the end bar. 2 co-operates with the tail portion 26 to .limit the swinging movement of the latch under 5 ring pressure. I I

The ail may readily be unlatched or freed from control of the spring pressed devices 26 and swung upward-and. forward platen by the'end arms. When swung forward, the bail may be brought to a'substantially horizontal position as illustrated inFig. 2 where the arms 16 are shown extending forward from their pivots 15 and the cross bar 18 as resting on a t supporting device '32. Said ,device is prefer: ably made of a single piece of sheet metal an comprises a'cross portion 33 and a stem '34 which extends rfirward and is bent at 35 to provide an inverted U orsupport proper for the cross bar 18; The portion"33-=is formed with a air of elongated holesindicated at 36 which receive headed screws 37 whereby the device isadjustably secured tothe part 10. The top ofthe U-portion 35 is scored or lined as indicated at 38 to provide an indicator or pointer. This pointer 38 co-operates with a scale indicated at 39 which is formed on that face of the bar 18 and which is substantilly vertical or facing the operator when the bail is-forward in the abnormal position of Figs. 2 and 6. The opposite face of the cross bar is formed or provided with a scale indicated at 40, said concealed. The scales are brought into and out of use by movement of the scale bar, or in other words by swinging movements of the bail. The member or device 32 combines the functions of'a pointer or indicator and of a bail sup ort. On returning or swinging the bail bac to engage with the platen, the hub 17 will'strike inclined or cam edges 41 at the tops of the latches 26, forccontrols and guides the paper or work sheets above the printing line on'the platen, the paper below'the printing line being under the control of suitable feed roller devices, i'n- 'dicated at 42 in Fig. 1. No pa 'er fingers'are shown herein and the bail is ound in prac-- tice efiiciently to perform the necessary controlling and guiding functions without the use'of paper fingers, but if desired paper fingers may bail. w 1 It will be seen that the latches '26 not only hold the bail but also operate when paper is inserted to transmit the effect of the springs be employed in addition to the p 29 to the bail rolls 20-. This will be clearly and 5, from which-it will be'seen that the insertion of paper between the platen 11 and therolls-20 milLtendJQlggl thymus p? ward and slightly rearward arduiidtliemen? ter 15, causing the hubs or enlargements 17 acting against the upper sides of the notches 28 to tend to swing the latches 26 rearward abo ut their pivots 27 The tail portions 26" understood from a consideration of;Figs. 1""

, by. a 4 Various changes may be made without delatches will cause the upper portions thereof to press downward against the hubs 17' and hold the bail, and also transmit spring pressure to it and to the paper controlled thereparting from my lnvention.

What-I claim as new vand desire by Letters Patent is 1. In a typewriting machine, the combination of a platen, a platen carriage, a paper bail mounted thereon, latch devices for maintaining said bail as a whole in normal position, and springs for said devices, said devices being releasable in' opposition to said to secure springs toafiord movement of said bail to an abnormal inoperativeposition, said devices also transmitting the pressure of said springs to said paper bail to render it operat1ve on the platen. .2. In a typewriting machine,

spring-pressed latches pivoted on said car-. riage and co-operative with said rod or bar near its ends to maintain both said means and also said rolls in normal relationship with the platen, the bail being releasable from said latches so that it may be swung away from the platen to inoperative position,-said latches normally bein effective to transmit spring-pressure to sai paperbail.

. 3. In a. typewrlting machine, the combination of a platen; a carriage comprising end bars provided with forwardly extending 1 upwardly projecting rigid armsor extensions; a paper bail comprising crank arms ars of the carriage'a'nd also comprisin a rod carrying pressure rolls, said rod being mounted on the crank arms and havin bosses or extensions at its end portions, said crank arms extending downward and rearward from their pivots and the rolls cooperating with the platen above the printing line; and spring latching devices on the carriage engaging said bosses to maintain said crank arms in normal position, the bail being releasable so that it may be-swung forward away 4. In a ty ewriting machine, the combination of a p aten, a platen carriage, a paper bail thereon, said bail comprising a rod or bar-which also serves as a scale bar, and a the combination of a platen; a carriage; a paper bail y from the platen to a. sub-- stantiallyhorizontal position,"

nation of a platen, a platen carriage, a paper bail thereon, said'bail comprising a rod or bar which also serves as a scale bar, said scale bar serving .as a platen scale when the bail is in normal position, and a stationary pointer withwhich said scale bar is adapted to co-operate when the bail is moved away from the platen to abnormal position. I

6. In a typewriting machine, the combination of a platen, a platen carriage, a paper bail thereon, said bail comprising a rod or bar which is provided witha plurality of scales and serves as a sca'lebar, and a sta tionary pointer device 'co-operative with the scale bar whenthe bail is swung to abnormal position, said pointer device serving also tosupport the bail.

7. In a typewriting machine, the combination of a platen, a platen carriage, a paper bail thereon, and a stationary support. on

"which said bail is adapted to rest when m abnormal position.

8. In'atypewriting machine, the combination of a platen, a carriage, and a scale bar provided with two scales, said bar being movablymounted on said carriage, and normally co-operative with said platen, said bar being also adapted to serve as a scale bar when moved to abnormal position.

9. In a typewriting machine, the combination of a platen, a carriage, and a scale bar rectangular in cross section and mounted on the carriage, said scale bar being. provided with two scales on opposite faces of the bar, one scale normally co-operating with the platen and serving as a platen scalewhile the second scale is concealed, the bar being movable to abnormal 0nd scale is exposed or use.

10. In a ty ewriting machine, the combination of a p aten; a carriage; a paperbail pivoted directly to the end extensions of the comprising a bar, and crank arms pivoted on osition where the secthe carriage to which the ends of said bar are secured; a

to said latches and normally maintaining their slots engaged with the hub portions of said crank arms.

11. Ina typewriting machine, the combiair of slotted latches pivoted on the carriage; and springs connected nation of a platen, a carriage, a paper bail mountedthereon', a pair of slotted latches also mounted on the carriage, and springs connected to said latches and-normally maintaining their slots in locking en agement with said bail, said latches being adapted to release said bail and being provided with cams whereb they may be 'forcediback by said bail so t at they may automatically relatch said bail."

Signed at Midd'letown, in the county of Middlesex and State of-Connecticut this 12th day of J anuary, A. D. 1925.

GEORGE G. some.

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