US990797A - Type-writing machine. - Google Patents

Description

WLE. BARNARD.

TYPE WRITING MACHINE. A

APPLIOATIOH rum: Ammo, 1909. 1

Patented Apr. 25, 1911.

, Fig.1.

STATES OFFICE.

WALTER E. BARNABD, or HARTFORD, connnc'rrciir. assreno'n TO rmmmwoon win- WRITER COMPANY, 01 NEW YORK, N. Y., a CORPORATION or NEW JERSEY.

TYPE-WRITING MACHINE.

all whom it may concern: I V

j Be it known that Var/rm: E. BARXARD', a citizen of the United States. residing in Hartford. in the county of Hartford and State of Connecticut, have invented certain new and useful Improvemel'its in Type-\Vriting Machines, of which the following is a specification.

This invention relates to ribbon winding mechanisms for typewriting and other ma- .chines, and is more particularly directed to 'means for effecting the automatic reversal of the direction of travel of the ribbon.

Qne object of the invention'is toprovide a simple and durablemechanism readily applicable to existing machines for efiectinga shifting of the. ribbon feeding mechanism when the ribbon has about run off one spool without imposing undue. stress longitudinallj' or otherwise on theribbon itself, which soften narrow and weak.

reversing mechanism is directly actuated by the mam power shaft, so that the necessity of the-1mpos1tion of a severe longitudinal pull or strain on the ribbon isavoided. To

eifect this result I have provided aninterponent between the drive shaft and an abutmentorsupport on the framework, said interponent swiveled upon a ribbon-operated carrier for movement mto engagementwith the driv ng shaft member when .e1ther spool becomes full. The eifect of engaging the inthe full spool and into connection with the terponent. with the drive shaft member is to cause the interponentto turn on its swivel, whereby it is carried into engagement with the abut-mentor support: and .as the interponent continues to turn. it- ,re-acts upon the part carried upon the shaft with thee-fi'ect of shifting the shaft out of connection with empty spool. 1

In the accompanying drawings. Figure 1 -is a perspective view showing one embodiment of mv invention. 'Figs. 2. 3. stand 5 are enlarged detail bottom plan views .of the successive posi'tions assumed b v theparts when etfecting' the reversal of the ribbon travel. .Fig. 6 is a top plan view of a full spool showing the position of the follower "when crowded away by the multiplied coils cifribbon. The invention is illustrated in connection with ribbon winding mechanism such as is In carrying out the invention, the ribbon- Specification of Letters Patent. Patented Al)1'..25. 1911.

Application filed August 20, 1909. Serial No. 513,850.

strike 'typewriting machine, in which the ribbon spools 1.1 are carried upon a pair of vertical shafts '2. 2. the latter being provided attheir lower ends with winding gears or pinions 3, 3?. A horizontal driving shaft #:l extends across the machine and carries drivinggears 5, 5 conveniently shiftable, as

A cam-member 6 is rotatably mounted on a shifting support or carrier, as the. arm 1, whichin'this instance is operated by a .vertical shaft 8. provided with a coiled spring 10. to yieldinglv maintain a follower 11 carried by an arm 13 on the upper end of the shaft 8 in position to be engaged by the ribbon coils on the spoolswhen the latter become nearly full. e The cam normally lies adjacent an abutment 14 which may consist of a roll. and th cam is conveniently provided with means to be moved into lllQSh-WIltl1 a gear on the main power shaft- 4, whereby to actuate'th'e cam againstits abutment and efiect ashifting of the power shaft to reverse the ribbon feed.

.The cam is equipped with anormally idle pinion 15 fixedly secured thereto and mov-.

able into engagement with a gear on the power shaft. as the driving gear 5.

-The usual spring detent l6 and beveled collar 17. the latter fast on the power shaft,

are usedto releasablv maintain the reversing 'is engaged by the coil .of ribbon. As the coils multiply, the follower is forced-1 or crowded away from the spool against the tension of its spring 10. This movementof the follower imparts a partial rotation to its vertical shaft-8 which is transmitted to the arm-or carrier 7 on which is carried the interponent cam and pinion. .andresultsdn moving the pinion; into mesh with the-drive "gear theretoadjacenton the power shaft. The drive gean because10fits" rotary*"move- .ment. immediatelv rotates-v the ipinion .as

shown by thefflirr'o s.-

' 'e'by. causing the I steps of the operation are shown.

I cam to bear against its abutmentflf lhe reaction of the'cam forces the latter with itspinionancl arm away from the abutment in the same direction inwhich the arm was first actuated by the follower; and, as a'result,

the idle pinion will push'or crowdthe driving gear 5 and its shaft away from the spool gear 3 with which it was primarily in mesh, thereby causing the remaining drive gear 5 on the power shaft to engage the opposite spool gear 3 and efi'ect" the reversal'o of the ribbon. The shifting movement of the power shaft will also cause the spring 'detent to ride across its beveled collar and when the coil of ribbon on the spool is small,

, the arc-shaped dot-and-dash line diagram:

1 of cams or a Y loss of time.

matically indicating the coil of ribbon.

Fig. 3 shows the position of the parts when the coils of ribbon have so multiplied on the spool as to engage and crowd the follower-laterally, thereby operating the arm 7 to move the idle pinion 15. into engagement with the drive gear 5 thereto adjacent.

Fig. 4 shows'the position of the parts at the extreme limit of movement afforded by the cam when in engagement with .he abutment to crowd the power shaft endwise, thereby throwing the drive gear 5 out of mesh with its spool gear and causing the engagement of the remaining drive and spool gears to reverse thcribbon feed. From this view,' i,t will be observed that the point of thc eanrin engagement with the abutment nnght possibly slip over the abutment and thustake longer in operating the next time,

because the "cam would have to be completely rotated before its cam face could onexpedite the o ration, I employ a plurality .diiuble cam, so that there will always be one in'position to operate without This view also discloses the 7 fact that the cam action forces the follower away from the full spool.

scope of the invention, as for instance thev 'interponent may be otherwise formed and operated, and portions of the improvements may be used without others. Y

, travelspool. j I

2. In a rlbbon-reversmg mechanism, thenation with a ribbon spool and a revoluble. member'shiftable into and out of position 'to wind said ribbon spool, of' a normally idle' 'revoluble member, means to enable the ribbon to throw said normally idle revoluble member into engagement with said shifta'blc revoluble member, and switching means ac mated by the revolutionof said normally idle'rcvoluble member to throw said shift able revoluble member relatively to said combination with a spool, a spool gear, and

a-drivin shaft shiftable endwise to connect with said spool, said driving shaft having a gear to shift into and .outof mesh with said spool gear,'a r bbonscontrolled arm carrying a gear normallyfidle, means being provided to enable the ribbon to cause said idle gear to swing into mesh with said shifting. gear to be rotated thereby, and means operated said shiftable gear. l

. 3. In a ribbon-reversing mechanism, the combination with a spool, a spool gear, and a driving shaft sbiftable endw'ise to connect with said spool, said drivin shaft having a gear to shift into and onto mesh with said spool gear, a ribbon-controlled arm carryim a gear normally idle, means being provided to enable the ribbon to cause said idle gear to swing into mesh with said shifting gear to be rotated thereby, a,c;':m connected. to said idle gear to be rotated i'hereby,-and an abutment against which said cam may bear by said idle gear to effect the shifting of to enable said cam to swing the-arm and thereby shift said shifting gear. r

4. In a ribbon-reversing mechanism, the combination with a spool, a spool gear, and a driving shaft shiftableendwise to connect with said spool, said driving shaft ha-ving a gear to shift into and out of mesh with said spool gear, a ribbon-controlled arm carrying a gear normally idle, means being provided to enablethe ribbon to cause said idle gear to swing into mesh with said shifting gear to be rotated thereby, said idle. gear provided with a plurality of cams, and an abut-ment against which any oneof said plurality of cams may bear-to swing said arm and said-idle gear, and thereby shift said shiftable gear away from the spool gear.

5. In a typewriting machine, the combination with a pair of'ribbon spools and a pair of gears for winding them, of a drivmg shaft having gears shiftablealternately into mesh with saidspool gears, a pair of ribbon-controlled; supports, normally idle gears carried by said supports and lying in proximity ti) said driving gears, means controlled by the ribbon to move said nor-. 'mally idle gears alternatelyinto mesh with' eeo,797 V 3 their associated driving gears, cams coni nected to said idle gears t-o'be operated thereby, and abutmentswith which the cams co6perate to effect a shifting of said driving gear from one spool gear to the other. I 6;. The combination with a. ribbon spool,

V a power shaft and a revoluble memberon 7 the shaft shiftable into and out of position 7 --"-to wind said spool, of a normally idle'revmoving the normally idle revolnble mem- 'oluble member, ribbon-controlled meansfor V-ber into position to be rotated from the f'sha-ft, and means actuated by the rotation of-the normally idlerevoluble member to throw the shiftable. revoluble member. relatively to the s 001.1

to wind said spool; of a normally idle revoluble member, ribbon controlled means,

for moving "the normally idle revolnble member into. position to be rotated from the shaft, and 'a cam actuated by the rotation of the normally idle revoluble member, to throw the shiftable revoluble member relatively to the spool.

spool.

8. The combination with a ribbon spool,

"a power shaft and a revoluble member on 3O the shaft shiftable into and out of osition to wind said spool, of a normally i le rev- 'oluble member, ribbon controlled means 7 for moving the'nornially idle reyoluble memher into position to be rotated from the shaft, a cam actuated by the rotation of the normally idle revoluble member, and an abutmentengaged-by the cam to throw the shiftable revoluble member-relative to the spool.

9. The combination with a ribbon spool,

a power shaft and a revoluble member on theshaft shiftable into and out of positionto wind said spool, of a normally idle revoluble member, ribbon controlled means for moving the revolnble member into position to be rotated from the shaft, 2. double.

cam actuated by the rotation of the normallyidle revoluble member, and an abutment engaged by the cam to throw the shiftabl'e revoluble member relative to the 10. In aribbon reversing mechanism, the

' combination with a spool. a spool gear for actuating the spool, a shiftable drive shaft and a gear on the shaft shiftable therewith into and out ,of mesh with the spool gear, of a normally idle rotatable member, means to enable the ribbon to throw the idle member intoposition for rotation from'theshaft,

a cam actuated by the idle rotatable member.

V and an abutment againstwhich the cam wipes for actuating the shiftable gear relative to the spool gear. v p 11. The combination with a ribbon spool,

a power shaft and a revoluble member on;

the shaft shift able into and out .of posit-ion to wind the spool, of a normallyidle rev olublemember, means for rotating. the-nor mally idle revoluble member and normally out of engagement therewith, a swinging arm supporting the normally idle revoluble member, ribbon controlled means for swingmember relatively to the spool.

l2. Theicombination with a ribbon spool,

a power shaft and a revoluble' member on the shaft shiftable into and out of position to wind, of a normally idle re oluble memher, means for rotating the normally idle revoluble membe-r ..and normally out of engagement therewith, a swinging arm sup porting the normally idle reyoluble member,

arm into position whereby the normally idle re oluble member is rotated, and a cam actuated by the rotation of the normally idle member to throw the shiftable member rein tively to-the spool. 4

13. In a ribbon reversing mechanism, the

-ribbon controlled means for swinging the combination with a spool, a ribbon to windthereon, a gear for driving the spool, a-shift able dri ingshaft, a gear thereon adapted to e shifted therewith into and out of mesh with the spool gear, a ribbon controlled arm, a normally idle gear on the arm. means for enabling the ribbon to swing the ,idle gear into mesh with the gearon the driving shaft to cause the rotation of the idle gear, and means actuated by the idle gear for effecting the shifting of the, shiftable gear. I

14. The combination with a ribbon spool, a power shaft, and a revoluble member on the shaft shiftable into and out of position to wind the spool, of a rotatable shaft, yielding means for urging the shaft in one direction, an arm carried by the shaft, a normally idle revolnble member mounted on the arm, means for rotating the normally idle revolu ble member, said means normally out of en-.

into position whereby it is rotated, and

means actuated by the rotation of the nor-' mally idle member to throw the shiftable member relatively to the spool.

15. The combination with a ribbon spool,

a power shaft. and a re oluble member on the shaft shiftable into and out of position.

to'wind the spool. of a rotatable shaft, yield in'g means for urging the shaft in one direction. an arm carried by the shaft. :1 norm'ally idle reyoluble member'mounted on the arm, means normally out of engagement "with thenormally idle re oluble member for rotating thesame, a second arm carried by ribbon adapted to actuate the follower tothe' shaft, a ribbon engaged follower, *the .7 partially rotate the shaft and swing the normally idle revoluble memberinto engage ment with its rotating means, and means actuated by the rotation of the normally idle member to throw the shiftable member relatively to the spool. 7

-16. The combination with a pair of ribbon spools, a ribbon adapted to be wound thereon,..a. power shaft, revoluble members on the shaft shiftableinto and out of position to rotate one spool or the other, of'apair of idlerotatable members adapted for engagement with the shiftable members and normally out of engagement therewith, a pair of ribbon controlled means for swinging one orthe other of the normally idle members into engagement with the shiftable revoluble members associated therewith, and means actuated by the rotation of either normally ,idle 'revolublc member for throwing the shiftable revoluble member engagedthe'reby relative to its spool.

17. In a ribbon reveising mechanism, the combination with a pair of spools, spoolgears for actuating the spools, ashiftable rive shaft, and gears on the shaft shiftable therewith into and out of mesh with the spool-gears alternately, to effect the reversal v of the ribbon feed, of normally idle gears,

ribbon controlled means for throwing the idle gears alternately into engagement with a gear on the drive shaft; and means'actuated by the idle gears for effecting the reversal of the ribbon feed.

18. In a ribbon reversing mechanism, the gombination with a pair of spools, spool' gears for actuating the spools, a shiftable drive shaft. and gears on the shaft shiftable and swiveled u "shifting therewith into and out of mesh" with spool-gears alternately, to efl'ect the '-reve1 of the ribbon feed, of ribbon-control revoluble members, means actuated'by ribbon forthrowing the revoluble memb alternately into engagement with a rotat means, cams actuated by the revolu means, and abutments engaged by the ca for throwing one shiftable ear out o'f-mt W with its spool gear and simu taneously me ing the remaining shiftable gear with spool gear to reverse the ribbon teed; 19. The combination with a ribbon spc a ower shaft and a revoluble member shi ab e into and out of position to wind l spool, of a. normally idlerevoluble memb a "swinging support for the normally it member, yielding means normally retaini the member in idle" position, 'ribbon cc trolled means for swinging the supp( against'the tension ofthe yielding means,

a position in which motion is impartedthe' normally idle revoluble. member, a: means actuated by the rotation of the m mally idle member to throw theshiftal member relatively to the spools. T

2O, In a ribbon mechanism, the combin tion with a shiftable ribbon driving 'sha:

of a carrier whose movements are oontroll by the r bbon, an mterponent normall .10

ppm sa d barrier, which caused by the r1 bon'to move'i'i'ito .engag anent with apart upon'said drivingsha:

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