|Publication number||US981808 A|
|Publication date||Jan 17, 1911|
|Filing date||Dec 5, 1908|
|Priority date||Dec 5, 1908|
|Publication number||US 981808 A, US 981808A, US-A-981808, US981808 A, US981808A|
|Inventors||Herbert H Steele|
|Original Assignee||Monarch Typewriter Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (6), Classifications (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
H. H. STEELE.
TYPE WRITING HAGHINE.
APPLIGATIOH FILED 1120, 5, 190a.
981,808. Patented Jan. 17, 1911.
3 SBEETHHEET 1.
75M M/Mm avMM 1-115 ATTORNEY n1: NORRIS IETIRS co. w'asumarou, 0. c1
H. H. STEELE.
TYPE WRITING MACHINE.
APPLICATION FILED DBO. 5, 1908.
981,808. Patented Jan. 17,1911.
3 BHEIITB-BHEBT 2.
P NVENTUR )1. a JW 4. 4m 145 ATTORNEY 1!!! norms IErlns co, Wuumorou, n. c.
TYPE WRITING MACHINE.
APPLIOATION FILED 11120.5, 1908.
981,808. 1 Patented Jan. 17; 1911.
8 SHEETSSHBET 3.
m: mourns PsrsRs 50., wnsumcmm 1 UNITED STATES PATENT OFFICE.
HERBERT H. STEELE, OF MARCELLUS, NEW YORK. ASSIGNOR TO THE MONARCH TYPE- WRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.
Specification of Letters Patent.
Patented Jan. '17, 1911.
Application filed December 5, 1908. Serial No. 466,124.
To all whom it may concern:
Ile it known that I, Iluaemrr H. S'rnnnn, citizen of the United States. and resident of Marcellus. in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Type-\Vnting Machines, of which the following is a specification. I
My invention relates to typcwritmg machines and more particularly to ribbon feed mechanism for such machines.
lleretoflme it has been customary to retate the winding or driven ribbon spool at a uniform rate, the velocity of the winding spool being constant relative to the travel ot' the carriage in the direction of its feed. Utherwise expressed. the driven spool has been given a uniform extent of rotation at each intermittent teed movement of the ear rhng'ev In such a con truction, when the ribbon i being wound onto an empty or nearly empty spool. the longitudinal feed of the ribbon is comparatively slow: and as the amount of ribbon wound on the spool in creases the velocity of the ribbon through the printing lield gradually increases in proportion to the increasing diameter of the uinding on the core. This causes an i1- regular longitudinal teed ol the ribbon past the printing field: a t'ecd that is comparalively slow or short at the start and gradte ally increases as the opposite end of the ribbon is approached. 'hen the ribbon begins to teed on the empty spool in certain machines on the market the types make up prtnvimately one hundred impressions for each linear inch of travel. "hen the winding spool is full. and the direction of the teed about to be changed. the types make approximately 'lort v-scvt-n impressions to every linear inch of teed. In other words. the ribbon at the end ol' the streteh is tell more than twice as last relatively to the 'l'eed of the carriage and twice as far at each intermittent teed movement as it is at the start where it begins to wind on the empty spool.
()ne of the main objects: of my present in vention is to overcome the above dilliculties and to provide in ans whereby the velocity and extent of rotation of the winding spool aries progressively according to the amount oi riloben wound on said spool. for ctiecting uniform travel of the ribbon past the printlng field.
To the above and other ends which will hereinafter appear, my invention consists in the features of construction, arrangements of parts and combinations of devices to be hereinafter described and claimed.
In the accompanying drawings in which like reference characters designate corresponding parts in the various views, Figure l is a fragmentary central vertical fore and aft sectional view showing the upper portion of one form of typewriting machine embodying my invention. Fig. 2 a fragmentary front view, partly in vertical section, of a portion of the ribbon mechanism shown in Fig. 1. Fig. 3 is a fragmentary plan view with parts in section of the ribbon feed mechanism. Fig. 4; is a view corresponding to Fig. l but showing a modified form of construct ion embodying my invention, Fig. is a rear view in vertical section showing the modified form of construction illustrated in Fig. at. Fig. 6 is a fragmentary side view showing parts of a ribbon feed mechanism of still another modified form of construction embodying the invention.
I have shown my invention in the present instance embodied in a Monarch machine, although it. should be understood that the invention is applicable to other styles of typewriting machines.
iel'erring particularly to Fig. I, and J). the corner posts 1 of the machine support a top plate 2 on which a suitable carriage (not shown) is mounted to travel from side to side of the machine, the carriage supporting a cylindrical platen 3. Type bars of the usual form are adapted to strike upwardly and rearwardly through an opening 4 in the top plate against the front face of the platen 3. the ribbon being automatically interposed in the path ot. the type by the usual mechanism for actuating a ribbon vibrator 5. The ribbon A passes through guide openings in the ribbon vibrator from one ribbon spool (S to the opposite ribbon spool T. The ribbon spools are received in cups or containers 8 provided with guide openings 9 through which the ribbon passes. The carriage is connected in the usual manner to a spring drum 10 provided with a pawl II pivoted thereto and engaging a ratchet. wheel 12 connected with a beveled gear 13 which in turn meshes with a companion beveled gear lat provided with a collar or sleeve '1? having a l'll'tlllllftl'lllltll groove 16 therei in. lixed fork 17 engages in the groove It' in the collar to maintain an engagement between the beveled gears l2 and 14 at all times. The beveled gear ll and its sleeve are loosely mounted upon a shaft lb journaled in depending bracket arms 1%) and 20 for both rotary and longitudinal movement. A sleeve or collar 21 is secured to the shaft '15 by a screw This sleeve it is provided with arms 23 that extend longitudinally of the shaft on opposite sides thereof and are received in openings or cut-outs formed in a circumferential. flange 24 on the sleeve 15 of the beveled gear 14. By this construction a rotative connection is at all times maintained between the shaft 18 and the beveled gear 14. although the shaft is adapted to receive a longitudinal movement independently of the gear 14. The shaft l8 also carries a beveled gear 33 which has its hub secured to the shaft by a screw '26. A like beveled gear 27 is secured to the shaft near the opposite end thereof by a screw A beveled gear 2t) secured by a screw 30 to the rear end of a. horizontally disposed shaft 31 and at the opposite side of the machine there is another beveled gear connected by a screw to the rear end of a horizontal shaft Ill. It will be understood that the longitudinal movement of the shaft is. etleeted either through the usual hand actuated crank at one end thereof or through the usual means employed in the l\l onarch machine for instance for automatically effecting a. longitudinal lllOVtlTliPHt of the shaft. brings about the disengagement between the beveled gears QT and at one side of the machine and the engagement of the beveled gears "25 and 99 at the other side of the machine. or vice versa, depending on the direction of longitudinal movennnit of the ha ft 1 A pivoted arm 33 carries an anti-friction roller 311 that cooperates with the usual spring-pressed ram device 3T to assure the full extent of longitudinal movement of the shaft l8 in either direction and to effect and maintain an engagel'nent between the gears '27 and or 27 and 29 it being understood that the pivoted arm 33 is received in a rut'out or eireum'ferential groove 38 in the shaft 18 and partakes of the movement of the shaft as the latter re eeives a longitudinal shifting movelmnit. The shaft 3 is mounted in bearings in depending projections 39 and 40 supported by the top plate of the machine. The hub of the gear 32 cooperates with the pro'jectioi'i 40 to prevent a longitudinal movement of the shaft fi l in one direetion. whereas the movement of said shaft in the opposite dire tion is prevented. by a collar 41. secured to the shaft by a screw 4-2. The shaft Skis provided with a spline 4 which is received in a spline groove of a sleeve 44. This sleeve carries a wheel 15 at one end thereof which has a groove in which a tire, contact or periphery to of rubber or like material may be seated. The member 4t also has a circumferential groove H therein, said groove receiving inwardly extending pins lb of a yoke-like piece All earried by an arm .10 supported and controlled in a manner which will hereinafter appear. A coiled expansion spring 51 surrounds the shaft 34 and bears at its rear end against the sleeve ll and at its forward end against the rear end of the member l t in order to force the member H for ardly along the shalt 31.
.The splined connection between the member -14 and the shaft Ill cause the member 44' to rotate with the shaft but leaves said member free to receive an independent movement along the shaft. From an inspeetion of Fig. .i it will be seen that the movement of the member "i 1- along the shaft 231- carries it nearer to or farther from the axis of a friction disk felt which is disposed in a vertical plane. This friction dish is fixed in any suitable manner to a rollar fill mounted upon and fixed to a shaft or spindle at by a. pin 53% the sleeve .33 forming the hub of a beveled gear 55. One end of the shaft 54; is received in a bearing opening in a depending braelt'et arm 56 secured to the top plate of the machine by screws ST. The opposite end of the shaft is received in a bearing opening in the depending projection 39. The inner end of the haft o-l extends beyond the bracket in; and is formed with a conical end 5 against which a leaf spring 52) beats the spring being secured to the bracket by a screw 130. The pressure of this spring is exerted to move the shaft illlongitudinally in its bearings toward the depending projection illl and is ellective, to constantly overt a pressure of the disk 5:. against its cooperating l'rirtioual driving wheel l7 and to automatically emupensate for any wear that may tahe place on the trend of the wheel ii.
The beveled gear 3;] meshes with a rom- 1 panion gear (ll serured by 1 pin 13; to an upright ribbon spool shaft hi1 which is re- ('(H'ttl in a bearing opening in the d pend ing Pl'tlJtt'lttHl ill? and extend through the top plate and rarries at its upper end the left-hand ribbon spool (1, Th s i in! also serves to maintain the pinion Fifi in mesh with the pinion (ll. The arrangement of the parts is snrh that the rnblrer trend of the wheel to bears against the friction did: and as the shaft iii rotates motion is transmitted through th wheel to the frirtion dish 59 and from the fricti n dis t to th ribbon spool through the gears in til and shaft (it).
The arm bereinbefore referred to is secured to the lower end of a vertieallv dis posed rot-l; shaft lllreceived in a l'iearing (l3 and extending through the top plate adiaeent to the ribbon Spool ti and just outside of the periphery thereof as shown in Fig. 3. sleeve (it is secured to the upper end of the shaft by a pin (ST and carries an arm as forked at it end as intlieated at 69 for the reception of a roller 70 pivoted between the arms of the fOt'h'. The arm and roller are adapted to pass between the flanges 7] of the ribbon spool and to be pressed against the outer sin-tare ot the ribbon Wound thereon by the spring 51 acting on the member it. l rom an inepection of Fig. h it will be seen that the caeing H tor the ribbon spool enlarged at T2 to rereive the arm tit-t When the latter is moved to the dotted line position shown in mid ligure where it is free of the ribbon spool and at this time does not interfere with the removal of the ribl'uon spool from its shatt and from the casing. The sleeve 6 is likewise provided with a crank arm 73 which extends through an opening H in the enlargement T2 of the easing and is provided with a finger piece 75 at the outer end thereof in order that the rock shat't may be turned by hand to move the arm (in to the position shown in dotted lines in Fig. 55 to clear it of the ribbon spool s that the latter may he removed from the machine.
From the it'oregoing description it will be understood that the spring Til tends to force the member 44 forwardly along the shaft 34 toward the axis of rotation of the friction disk 52 and that the position of the wheel 45 relatively to the axis of rotation of the disk is controlled by the swinging arm 68 through the engagement of the roller or contact pit-re T bearing on the surface of the ribbon on the spool. From an inspection of Fig. I it will be seen that the dotted line (1 extends through the roller l3 and through the outermost layer of ribbon Wound upon the spool (3. This relation in maintaintal at all times. Thus it will be understood that if there are but few windings ot' the ribbon upon the spool (3. the wheel -15 will be near the center of the trirtion disk 52 and as the spool is rotated and the diameter ot the coil of rib bon on the spool increases the contact device it! will be Forced outwardly from the axis of the ribbon spool and will effect a. move meat of the wheel 4-5 to a corresponding distance from the axis of the friction disk 52 through the intermediate swinging arm (38. rock sha't't ht, arm 50 and yoke member l-fl. It will be seen therefore that the smaller the winding of the ribbon on the spool the higher will be the velocity of the spool ell'ecterl through the ratioehanging gears 45 and 52 by reason of the fact that at this time the wheel 45 is nearer the center of revolution of the disk 52. As the ribbon is taken up and wound upon the spool G the wheel 45 is gradually moved rearwardly along the ahat't. 3341 through the intermediate mechanism between the member 4t and the eontact device or roller ill and the velocity transmitted to the ribbon spool through. the ratio-changing gearing gradually decreases as the wheel 45 approaches the periphery of its cooperating friction disk 5'. so that the velocity ot' the spool is dependent upon the diameter of the core of the spool on which the ribbon is being Wound together with the ribbon wound upon the core and the ribbon will be tied past the printing field at a uniform speed; that to say. at each printing movement or at each letter space feed movement of the carriage the ribbon will be fed a uniform dist-nice irrespective of the amount ot' ribbon which is wound upon the winding spool.
l have described the construction and a rrangement of the parts between the beveled gear 32 and the left-hand ribbon spool. It should be understood that the parts intermediate the right-halal ribbon spool and the beveled gear 2t) ('(H'I'OHPOiltl with those at the left-hand side of the machine and a detail description thereof is deemed unnecessary. The same reterence numerals are employed to designate the corresponding parts on both sides of the maehine.
In Figs. et and 5 I have shown a modified form of eonstruetion embodying my inven tion. Tn these figures the parts which are the same as those in the preceding figures will be indicated by the same reference numerals. In this modified eonstruetion the friction disk is horizontally disposed in stead of being vertically disposed as in the construction previously described. and is directly connected to the upright ribbon spool shaft 63* by a set screw it so that a relative adjustment may be etl'ected between the disk and the tread or t)eripher v he of the wheel 45. In this modified construction. therefore. it will be seen that the friction disk is directly connected to the ribbon spool shaft 63" instead of being conneeted thereto through intermediate beveled gears as in the previously described construction. Moreover the shaft 34 is: plojerted tor- \vardly beyond the ribbon spool shaft It i and receives a bearing in :1 depending lug W which projects vt'rom the top plate of the machine. Moreover the upright rock shat't 64 extends through the casing 9 at its upper end where it is provided with a knurled head 77 by which the shaft may 'be turned in order to remove the arm 68 from bet ween the flanges ot' the ribbon spool instead of the crank arm being provided on the rock shatt as in the construction hereinlwfore described. Otherwise the construction is essentially the sanv as that previously described.
In Fig. 6 a still further modification is shown in which a bearing 78 is formed in the depending projection 39" in which the upright ribbon spool shaft turns and the forward end of the shaft ill" is received in the bearing Tb. The wheel 45 in this instance bears on top of the horizontally disposed disk I'l instead ot on the under surface thereof as shown in Figs. r and 5, otherwise the construction i essentially the same as that shown in Figs. 4 and i") and the same reference numerals will be employed to designate the parts which correspond to those shown in the preceding figures.
The operation of the construction will be understood from the foregoing description. Briefly stated, as the ribbon A passes from the righi hand ribbon spool to the lefthand spool the ribbon on the core of the left-hand ribbon spool a will increase so as to increase the diameter of the coil of ribbon. As this increase in the diameter of the coil is etfected the swinging arm 9 will be moved pan the full line toward the dotted line position shown in Fig. 3, thus gradually moving the wheel 45, toward the periphery of the other member of the ratio-changing 't'rietiou gratring, thus gradually and progre sively decreasing the rate ot revolution of the winding spool (3 as the ribbon is wound thereon. The members 45 and 5: constitute also leverage changing devices eonneetml with the spool driving mechanism sinee the leverage on the spool changes in accordance with the position of the wheel 45 on the disk. the leverage being greatest when the wheel to is near the periphery of the disk and least when it is near the axis of the dish. The speed or rate o'l' the rotation ot the spool changes in accordance with this leverage. During the movement of the ribbon in the opposite direction when the shaft 15 moved longitudinally to eii eet an en gagement' etween the gears 25 and il the 1-pool T becomes the winding spool and the associated parts control the ratio-changing gear ot. that spool in the same manner, so that the speed of revolution of the driven spool relative to the carriage, whether it he the right-hand or left-hand spool, is automatically controlled to etl'ect a uniform intermittent l'eed ot the ribbon past the printing lield.
The ribbon teed mechanism of my present invention is particularly well adapted tor feeding an inlt ribbon ll of paper having the int; (:lj'iitlil. or ign1ent on the side next to the platen and being uninlted or plain on the opposite side thereof.
Various changes may be made without departing from the spirit and scope of my invention.
\\'hat 1 claim as new and desire to secure by Letters Patent. is:
l. in a typewriting machine. the combination of a pair of ribbon spools and means [or turning one or the other of said spools intermittently during the printing opera tions and thereby feed the ribbon first. in one direction and then in the other as may be desired; said means including means for changing the leverage of the turning means upon each of said. spools, so as to turn the driven spool. at ditlerent rates of speed as the ribbon is wound thereon, whereby a uniform extent oi feed of the ribbon. is etfeeted at each intermittent movement of the ribbon spool irrespective of the amount ol? ribbon wound on the spool.
In a typewriting machine, the combination of power driven means for moving the carriage, a pair of ribbon spools and means controlled by the power employed to move the carriage for effecting a turning movement of either one or the other of the ribbon spools as may be desired at each printing operation to feed the ribbon past the printing point in either one direction or the other, said means inchiding means whereby progressively shorter intermittent winding movements are transmitted to the driven spool during printing operations as the ribbon continues to be wound thereon, to cause the ribbon to be drawn oil one spool and to be wound on the other or driven spool.
3. In a typewriting machine, the con|bination of a pair of ribbon spools, intermittently actuated driving means for said spools, and means whereby either spool may become the driven spooh said driving 11 :ans including leverage changing devices for driving either one or the other of said spools at dill'erent rates of speed as the ribbon is wound thereon; whereby a uniform extent of longitudinal feed of the ribbon is etl'ected at each intermittent: movement irrespective of the amount of ribbon on the driven spool and irrespective of which spool is the driven spool.
In a. typewriting machine, the combination oil a. pair of ribbon spools, driving means for said spools and by which the rib bon is drawn ofi' one spool and is wound on to the other or driven spool, and means whereby either spool may he made the driven spool, said driving means including changeable gearing and automatically actuated means for changing the ratio o't said gearing to change the rate of speed of the driven spool in accordance with the amount of ribbon wound thereon.
5. In a typewriting machine, the combination of ribbon spools; driving mechanism therefor and by the driving of which the ribbon is drawn from one spool and is wound on the other or driven spoohsaid driving mechanism including changeable gearing: and n'leans controlled by the amount of ribbon on the spool for determining the relation between certain of the members of said gearing to vary the ratio thereof.
(5. In a typewriting machine, the combination of ribbon spools; driving mechanism therefor and by the driving of which the ribbon is drawn from one spool and wound on the other or driven spool, said driving meehanisn'i ineluding changeable gearing: eontrolling means controlled by the amount of ribbon on the driven spool for determining the relation between eertain ot the members of said gearing and thus antomatieallv changing the rate of speed of said ribbon spool; and hand actuated means for said eontrolling means.
T. In a typewriting machine. the combination ol ribbon spools; means for inter- .mittentl v rotating one or the other of said ribbon spools and thereby drawing the rii bon otl one spool and on to the other or driven spool: and means. whieh inelnde a rontaet deviee that bears on the ribbon on the spool. for automatieally varying the 1() tative steps of the driven spool in accordance with the amount of ribbon wound thereon.
8. in a t vpewrtttng maehine. the rombination of ribbon spools; driving meelnn nism theret'or and by the driving of whieh the ribbon is drawn from one spool and is wound on the other or driven spool. said driving meehanism inrlnding ehangeable grating: and means, including a eontaet de vire whirh bears on the ribbon on the driven spool. for antomatieallv varying the relation between members of the ehangeable gearing as the ribbon is wound on the driven fifltlfll.
1'. in a t vpewriting machine, the combination of ribbon spools: mean r.-ontirolled hv the t'eed movement of the rarriage for driving either one or the other of said ribbon spools as mat be desired, said means inelnding ehangeable gearing; and automatieallv artnated means for changing said ehangeable gearing to vary the ratio thereof and to var v the turning or feed movement ot' the driven spool.
ltl. In a t vpewriting maehine. the roar bination ot ribbon spools: means eontrolled b v the t'eed movement of the rarriage for driving either one or the other ot said ribbon spools as ma v be desired. said means ineluding rhangeable gearing; and automatieallv artnated means for ehanging said elmngeable gearing to vary the ratio thereof and to vary the turning or feed movement of the driven spool, said automatically aetnated changing means including a eontaet deviee which bears on the surface of the ribbon on the driven spool and whose position I in aer-ordanee with the amount Is altered or" ribbon on the driven spool.
11. In a t vpewriting machine, the eombination o'l' a spring drum for the earriage; ribbon spools.- intermediate driving eonneetions between t bon spools for driving either one or the he spring drmn and the rib other of said spools as ma be desired, said intermediate connections including variable teed actuating devices; and automatically aetnated means for varying the aetuating devites to vary the rotative feed of the driven ribbon spool.
1.2. In a typewriting machine, the rombination of ribbon spools; means for intermittently rotating either one or the other 01 said ribbon spools as may be desired at each printing operation: means, which inelude a contact device that bears on the ribbon on the driven spool. for varying the extent of the ditl'erent intermittent rotations of the spool in aeeordanee with the amount of ribbon wound thereon, the ribbon as it is wound on the driven spool foreing said eontaet de- \lt't away from the axis of the spool: and a spring for toreing said eontaet device toa rd the axis of the spool.
13. In a typewriting maehine, the eo1nbination of ribbon spools; driving mechanism therefor actuated at eaeh letter space movement of the carriage to draw the ribbon from one spool and wind it on the other or driven spool. said driving mechanism ineluding a driving disk and a eoiiperative driving wheel; and means for. eti'eeting a relative movement between the wheel and disk toward and from the axis of the disk to var v the feed of the driven spool.
H. In a t \;pewriting machine, the eombination of ribbon spools; driving mechanism therefor actuated at each letter spare movement of the carriage to draw the ribbon trom one spool and wind it on the other or driven spool, said driving mechanism ineluding a driving disk and a eotlperative driving wheel: and means for effecting arelative movement between the wheel and disk toward and from the axis of the disk to vary the feed of the ribbon spool. said last mentioned means including a contact deviee that bears on the ribbon on the driven spool.
[5. In a typewriting machine. the combination of ribbon spools: driving meehze nism therefor aetuated at each letter spaee movement of the earriage to draw the ribbon from one spool and wind it: on the other or driven spool. said driving meehanism inelnding a driving disk and a cooperative driving wheel ,7 means for efleeting a relative movement between the wheel and disk to- :ard and from the axis of the disk to vary the feed of the driven wheel, Said last men tioned means ineluding a Contact device that bears on the ribbon on the driven spool: and hand aetuated means for moving raid eontaet deviee a 'ay from the ribbon.
16. In a typewriting maehine. the combination of ribbon spools; driving mechanism therefor actuated at each letter space movement of the carriage to draw the ribbon from one spool and wind it on the other tit) or driven spool. said driving mechanism ineluding a driving dislt and a cooperative driving wheel: a conta t device that bears on the ribbon on the driven spool; and intermediate connections between said contact device and said driving wheel.
ii. In a typewriting machine. the combination ot a ribbon spool: driving means for said spool: said driving means being actuated at each letter space movement of the carriage and inelmling variable feed devices; a swinging device contacting with the ribbon on the spool; and intermediate connections between the swinging device and one of said variable teed devices. to automatieally etl'ect a change in the extent of feed eti ected by the driving means.
18. In a typewriting machine, the combination of a ribbon spool: driving means for said spoohsaid driving means being actuated at each letter space movement of the carriage and including variable teed devices: I
a swinging device contacting with the ribbon on the spool: intermediate connections between the swinging device and one of said variable teed devices to automatically etlect a change in the extent of feed ell'ected by the driving means; and hand actuated means connected with said swinging device to throw it out of cooperation with the ribbon.
it. In a typewriting machine. the combination of a pair of ribbon spools; driving means therefor: and means whereby the spools may be alternately driven to wind the ribbon thereon. said driving means includ ing leverage changing means for the spool whereby each spool as it becomes the driven spool will be automatically led at a varying rate in accordance with the amount of rib bon wound thereon and thereby draw the ribbon from one spool and on to the other or driven spool.
20. In a typewriting machine, the combination ol a pair oi ribbon spools; driving means thcrel'or: means whereby one of said spools disconiumted from its driving means when the other spool is connected therewith, said driving means including leverage changing means for the spool for varying the rate of turning of the spool in accordance with the amount ot ribbon wound on that spool which is connected to its driving means.
21. In a typewriting machine, the combination of a pair 0" ribbon spools; driving means therefor; means whereby one of said spools is disconnected from its driving means when the other spool connected therewith. said driving means variable teed devices; and means for automatically changing the relations of said vari able Feed devices.
In a typewriting machine, the combination of a pair of ribbon spools; driving including l l l l i said rotary means therefor; means whereby one of said spools is disconnected from its driving means when the other spool is connected thercwith. said driving means including variable ileed devices tor each ribbon spool; and independent means cooperative with the ribbon on each spool for controlling the relation of the associated variable l'eed devices.
23. in a typewriting machine the combination of a ribbon spool: teed mechanism therefor actuated at each letter space movement of the carriage and including automatieally variable Iced devices; and means for automatically talting up wear between said automatically variable 'leed devices.
it. In a ribbon mechanism for typewrit ing machines. the combination of a rotary actuating device. actuated by the power employed to move. the carriage, a cooperating rotary actuating device which turns on an axis at right angles to the axis of. rotation ot said lirst mentioned rotary actuating device, and mean for automatically varying the distance from the center of rotation of actuating device at which it cooperates with said cooperating actuating device.
2.3. in a ribbon mechanism [or typewriting machiiws. the combination of two cooperating rotary actuating devices one ot which is actuated at. each letter space movement oi? the carriage to teed the ribbon. and means operating automatieally to \ary the distance from the center of rotation of one of said devices at which it cooperatively engages with the other at said devices.
in. in a typewriting machine. the combination ol ribbon spools: means controlled by the teed movement ol' the carriage for driving one or the other of the ribbon spools as may be desired, said means including changeable gearing; and automatically actnated means tor changing said gearing to vary the ratio thereof. and to vary the turn ing or Iced movement oi the. driven spool.
ii. In a typewriting machine the combi nation at ribbon spools; means controlled by the, feed movement of the carriage for driving one or the other of the ribbon spools as may be desired and to draw the ribbon from one spool to the other or driven spool, said means including changeable gearing. and automatically actuated means for changing said gearing to vary the ratio thcreot and to vary the turning or feed movement of the driven spooh said automatically aetuated changing means including a contact device which bears on the surface of the ribbon on the. driven spool and whose position is altered in accordance. with the amount. ot ribbon on the spool.
In a typewriting machine, the combination of ribbon spools and driving mecha. nism therefor operative at will on one or l ti H10 other of said spook said driving mocha f Signed at Syracuse,- in the county of nism inc-hiding devices for turning the Onondaga and State of New York this 3rd liliHH spun] at different rates of speed as day 01' Dccdmber A. I). 1908. v
the i'ililmn is wound thereon, the feed of the HERBERT H. STEELE.
l'ihhun being uniform at each printing stroke \Vitnusses: and dependent wholly 011 the changeable rate GEORGE L. COLING, of 811((311 of the driven spool. Bmssm G. KE'M'ELL.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3152678 *||Oct 29, 1962||Oct 13, 1964||Hunt David L||Ribbon take-up device for composition machines|
|US3345940 *||Jun 28, 1965||Oct 10, 1967||Addressograph Multigraph||Ribbon feed mechanism|
|US3348650 *||Jul 3, 1962||Oct 24, 1967||Mecanographie Japy Soc D||Ribbon feed mechanism for typewriters, computers, and similar machines|
|US3641930 *||Mar 27, 1969||Feb 15, 1972||Sunkist Growers Inc||Apparatus for printing indicia on fruit|
|US4168127 *||Oct 17, 1977||Sep 18, 1979||Triumph Werke Nurnberg A.G.||Constant rate ribbon winding mechanism|
|US4475829 *||Apr 30, 1981||Oct 9, 1984||International Business Machines Corporation||Capacitive metering means for uniform ribbon feed and take-up mechanism|