US908703A - Type-writing machine. - Google Patents

Description

G. A. SEIB. TYHI WRITING MAHINE. unieuro! FILED un 12. 190s.

Patented Jan. 5, 1909. 3 SHEETS-SHEET 1.

INVENTDR.

422W MMI/6 WITNEEEEE H15 TTDRNEY` G. A. SBIB.

TYPE WRITING MACHINE. APPLICATION FILED M'AY 12. 1905.

Patented Jan. 5. 1909.

3 SHEETS-SHEET Z.

INVENTUR, wf/WL# H45 'TmRNEY G. A. SEIB.

TYPE WRITING MACHINE.

APPLIUATION FILED nu 12. 190s.

Patented Jan. 5, 1909.

3 SHEETS-SHEET 3.

INVENTUR= HIS TTURNEY WITNEEl UNITED sTATEs PATENT oFEioE.

GEORGE A. SEIB, OF SYRAOUSE, NEW YORK, ASSIGNOR TO THE MONARGH TYPEWRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

No. eosfros.

Tolall whom "Ltlmay concern:

Blit known that I, GEORGE A., SEIB, citizen of thenitcd States, and resident of Syracuse, in the county of Onondaga and State of New York, have invented certain new and useful Improvements in Type- Writin Machines, of which the following is a speci cation. V

My invention relates to typewriting machines and it has for its princi al object to provide an *improved device or reversing the feed of the ink ribbon.V

My invention consists in certain features of `construction and combinations and arrangeniwts of parts which will be fully set forth herein and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a typewriting machine embodying my invention, parts being shown in section and parts broken away. Fig. 2 is a view .similar JoFig. 1 ofv a portion of the mechanism shown in "sid Fig. 1, the arts being shown in a diff. ont position. ig. 3 is a top plan view on a section taken-)ust beneath the top `plate of the machine, some t *he parts being omitted. Fig. 4 is a plan vie@` the upper part of which is on a horizontal section just beneath the top plate and the lower part of whichls on a horizontal section just beneath the u per flanges of the ribbon spools, some of t e parts being shown in this figure which are omitted in Fig.

I have shown my invention applied to a Monarch front-strike typewriter. The'main frame of this machine comprises a baseV portion 1 from which rise posts 2 that support a top plate 3. A platen 4 is mounted on a carriage 5 which is supported through ball bearings by rails 6 mounted on posts T which lrise from the top plate 3. In Fig. 1 that post. 7 whicl. is nearest the observer is removed in order to disclose the carriage feed mechanism, said feed mechanism comprising a rack bar 8 pivotally mounted on the carriage and meshil y* with a pinion 9 fixed on the forward cid of a shaft, the rear end of which carries an esca ement wheel l() which is controlled by vfee dogs 11 which `are mounted- Specification of Letters Patent.

Application led May 12, 1905. Serial No. 260,091.

- 44 a fhort distance to the right or, i.,

Patented Jan. '5, 1909.

mounted on a bracket v21` which is secured to 60 the under side of the top 'plate 3 and which also carries the dog rocker 12. The universal bar 16 lies beneath a series of key levers 22, which at their rear ends are fulcrumed`on a fulcrum plate 23 and at their forward eniS. cr, are provided with linger keys 24.. Said key levers are returned to normal position by re-, storing springs 25. A series of front-strike Vtype bars 426 are pivotally mounted inmany ype bar segment 27 'fo which may be mounte 1n the machine in sultable manner on a any suitable manner. As here shown, the type bars are mounted in. radial slotsy and they are pivoted on a pivot wire 29.which lies in a slot in the upper face of the, segment. Said type' bars are connected by `links 30 with sub-levers 31 which are ivoted'at 32 to the key leversy 22. Said sub evers extend below said key levers and said depending portions are formed with slots 33 which etnrace a stationary rod 34. The construction is such that whenv any key 24 is struck, the

corresponding type bar is thrown to the printing point on the front face of the platen and the carriage. is fed a letter space distance by the spring drum 20 controlled by the escapement dogs 11.

Two ribbon spools 35 are mounted on the upper ends of vertical shafts or spindles 36 which project upward through the top plate 3. being `iournaled in bosses 37 depending from said `top plate. Each of the spindles 36 has on its lower end a beveled gear 38' which meshes with a beveled pinion 39 mounted on the forward end of a horizontal shaft 40 which is journaled in brackets 41" dependinor from the top plate. 'i shafts 40Ll1as mounted on its rear end a b eled pinion 42 that is adapted to mesh 'wit a beveled pinion 43 mounted on ai drivjngf: il

shaft 44. The shaft-44 is rotatably and slidablyjournaled in brackets 45dependih" a such that the shaft 44 may be geared',

from the top plate 3. The construed? eitlw of the shafts 40 by sliding's'iiI shaft i4 is rotated to drive one 'or alnbtll the r'xibon spools b a beveled 'piiiidii" splinfd on said shat and meshingtwith` a;

beveled pinion 47'which is journaled o-ax-" Each of tl-'rel y `ially with 4the sprin drum 20. A ratchet wheel 48 rigid wlth t e pinion 47 is en aged by a pawl 49 mounted en said spring rum,A so that said ratchet wheel and pinion are turned with the spring drum when the carria is moving toward the left, but not wh n the carriage is moving toward the right. The pinion 46 is prevented from moving endwise with the shaft 44 in one direction by the pinion 47 and i'n the other direction byv one of the brackets which en-` gages the hub of Said pinim. 'The shaft 44A is yieldin ly, held in position for one yor the other of t e pinions 43 to engage one of the Binipns 42 by an arm 50, the end of which 'es m an annular groove 51 formed ir the -shaft 44. The other endof the arm 50- is pivoted in' a fixed bracketv 52 in which is mounted a spring-pressed plunger 53 havin two Vfshaped notches in the 'end thereo which enga. e a roller 54 mounted on the arm 50. This. evice is not shown in all its ldetails as it is' of ordinary andA well' known construction. s l

The ribbon spools35 are held a little above the top late by enlargements of the spindles' 36,;whic enlargements-are formed with upwardly projectlng lugs or pins 55 (Fig. which project into openings in the lowenpart of the ribbon spools and which serve'as'ikeys to cause. said `spools and the spindles to' turn which is ed from said together. The ribbon spools are surrounded by annular housings 56 `whichy areformed at 5 with ide slots for the ink ribbon 5S 'ide slots to a-ribbon `Vibrator 59 which is operated'by a lever 60 pivoted beneath the to plate and connected .b a link 61 with t e arm 15 of the universe bar. The construction thus far described is, or may be, substantially that ordinaril `used in the Monarch typewriter. Each,l oft e ribbon ools has a core 62 which is llattened'on one slde and on which th ink ribbon-58 is wound. Anv elbow lever 63, is pivoted at 64 onears struck down ,from the uwer flange of the ribbon ool, and said elbow 4.lever has an arm whic extends upward through a suitable hole in said flange opposite the flattened ortion of the core of the spool. The elbow ever 63 has a substantially horizontally disposed arm which lies beneath a cam plate 65 which is. loosely mounted on headed pins 66 projectin downward from the flange When theri bon is wound on the spool the upper arm of the elbow lever 63 is pressed by the coils of ribbon toward the core of the spool and the horizontally extendin arm o said elbow lever presses the 5am p ate 65 u aga' the lower face of the lower flange; ut met Qturn of the ribbon is unwound from this p si of the` spool, as shown' in the right-ha sped in l ig. 4 the arm of the elbow lever 63 is released an the plate 65 drops until it is arrested by theheads of the plus 66. The

mechanism just described is or may be substantialir the same as that shown in the .patent to fennel and (abrelson, No. 703,339, dated Jnnerzh, 1902.

A horizontallever 67 is pivoted beneath each of the" ribbon spools on a shouldered and headed screw 68 and said lever has a pin 69 projecting upward from one end thereof. This lever normally stands in such position that when the plate 65 is held up against the Bange of the ribbon spool, said plate in the rotation of said spool passes over the top of the pin; but when the elbow lever 63 is released and the plate 65 drops to its lower positionrthe cam end of said plate, by reason of @the further rotation of the spool, will engage the pin 69 and cam said pin away from the center 'of the ribbon spool, thus rocking the 4 lever-67. The opposite end of said lever is 4forked asshown in Fig. 4 to embrace a in T0 which projects upward through a suita le slot in the top plate 3 from a horizontal sliding rod 7 1. The pinv 70 consists of the reduced upper end of 'an arm or'bracket, the hub of which is adjustably fixed on the rod Vward the back of the machine and is slidably mounted in ears 73 'bent down from a snip port or hanger 74 which is fastened to tie under side ofthe top plate 3 by screws 75. The sliding motion ofthe rod 71 is adjustably limited in one direction by the hub of the pin engaging one of the ears 73`and in the other direction 'by a collar 76 secured by 'a setscrew on said rod near the rear end thereof and adapted to engage the other of said ears 73. Another collar 77 is adjustably fixed on the rod 7l between the ears '73 by means of ,a set'screw 78, and a spiral sprin 79 coiled about the rod 71 and compresse between 'the collar77 and the forward ear 73, normally presses the arin 71 toward the back of the machine, thus normally holding the pin 69 on the lever 67 in its position nearest piojectingthrough theslot in the top plate prevents the sliding rod from turning in its bearings; or, if preferred, any othei suitable means may be provided for this purpose. An

dered and headed screw 81 which isl threaded into a bracket 82 bent downfrom the hanger 74 at the rear end thereof. The lever S0 has i an upwardly extending arir that stands behind the rear end of the ro y wardly extending Weighted arm that extends over the driving shaft 44. Said Weighted arm controls a tooth 83 which iss ada to engage a worm 84 mounted on the rivm shaft 44. ln the present instance said toot or pin is formed on the under side 'of said rm. Said toot-h and worm constitute co gtitng trip ing* members for causing t e sha `44`to sliift itself by its own rotation.

71 by a setmcrew'7 2. The rod 7l extends toico the center of the ribbon spool. The'pin 70 110 angled trip lever 80 is pivoted on a shoul- 115 1 and a for-.120

.In the normal position' of the parts shown 130 in Fig 1 the rod 7l is pressed to its rear position by the spring 79 and said rod thus presses the upwaidly'extending arm of the lever 8O toward the rear rof the machine and holds the forwardly extending weighted arm of said lever in an upper position in which the tooth 83 is out of engagement with the worm 84. But when the ribbon has been unwound to such an extent as to release the elbow lever 63 and when the cani 65 moves the rod 71 to its forward position, the lever 80 drops by gravity to the position shown in Fig. 2 with the tooth 83 in engagement with the wormS-i. Upon the continued rotation of the driving shaft, the worm 84, engaging the tooth 83, draws tlieshaft 44 toward that side of the machine on which the exhausted ribbon spool is situated until the roller 54 has been moved out of one of the notches in the plunger 53 and has started to move into the other, at which point the motion of the shaft is completed by the spring plunger 53 acting on the roller'--and lever 50. There are, of course, two of the Worms 84, one of which has a right-hand and the other a left-hand' thread, and each of the ribbon spools is equipped with Va reversing mechanism such as has been described. The lever 80 has its horizontal arm prolon ed beyond the shaft 44, as shown at 85 in Igig. 2. The extension S5 is so formed as to engage the under side of the t plate and thus prevent any overthrow o the lever 80 when the rod T1 is thrown back bythe spring 79; and said extension also adds by its weight to the tendency of the lever to di'op when the rod Tl is withdrawn. Each of the teeth 83 is bent or beveled oli', as indicated in Fig. 2, at an angle corresponding to the itch of the worm 84. A light spring may e used to assist gravitv in dropping the tri i lever into engageinent with the worm, i preferred; and 1n case said lever be mounted horizontallyv instead of vertically, as in the present instance, such a sprin or its equivalent would 'necessarily be emp oyed. The right-hand tooth 83 and worm 84, when theyT are brought into operation, draw the shaft 44 toward the right and the left-hand tooth 83 and worm 84 are never called upon to slide `the shaft. except toward the left.

As will he seen yby reference to l. L and 4t the brackets 82 are cui'ved downward and toward the rear of the machine and the levers 80 lie for sonie distance in front of their pivots against the faces of said brackets. the right-hand lever 8() lying against the right-hand face of its bracket 82, .and the left-hand lever 80 lying against the-'lefthand face of its bracket 82. The construction is such that each of the brackets affords a firm support for the lever to overcome the resistance of the shaft 44 in a right-hand direction in one case and in a left-hand direction in theother.

Various changes may be made in the details of construction and arrangement without departing from my invention.

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

1. In a typewriting machine, the combination of a pair of ribbon spools; a rotary driving shaft common to both spools and having two worms thereon; twotrips adapted to fall by gravity into en agement with said worms to shift said shaA t endwise to connect it with one or another of said spools; two spring-pressed rods for Anormally holding said trips away fronisaidworms; and devices on said ribbon s cols brought into operation when the rilibon is nearly exhausted from a pool to move one of the spring-pressed ro s to allow its trip to drop into engagement with its worm.

2. In a typewriting machine,the combination of a pair vof ribbon spools; a rotary driving shaft adapted to be shifted endwise. to gear it to one or the other of said spools; a shiftin worm on said driving shaft; a trip adapte to fall by gravity into en gement with said worin; a spring-presse rod for normally holding said trip in inoperative position; and 4means on said ribbon spool brought into operation when the ribbon is` nearly exhausted from the spool, for posi.- tively moving said rod in the direction of its length against the tension of its spring to allow said trip to drop into engagement with said worin.

c 3. In a typewriting machine, the combinaftion of two ribbonspools mounted Vto turn on vertical axes; a driving shaft adapted to be`shifted endwise to gear it to one or the other of said spools; two worms on said driving shaft; trips adapted to fall by gravity into enga ement with said worms; spring pressed slida le rods for normally holding lsaid trips away from said worms; levers pivoted under theribbon spools and positively connected with said rods; and cams on said ribbon spools, normally held in inoperative position by the ribbon'but each adapted` when the ribbon is nearly exhausted from a spool, to drop into position to operate one of said levers to move its sliding rod against the tension of its spring to allow its trip to drop into engagement with its worm.

4. In a typewriting machine. the combination of a pair of ribbon spools: a self shifting endwise movable driver common to both spools and provided with a worm; a tripping lever normally tending to engage said worm: means normally holding said tripping )le'ver out of operative position: and means irotating with one of said spools for moving said holding means to a position permitting said tripping lever to move into engagement with said worm.

i 5. In a typewriting machine, the combinadevice to release said lever.

tion with a pair of ribbon spools, of a self shifting endwise movable driver common to both spools and piovided with a worm; a

tripping 'lever normally tending to engage' said worm; a device on the framework between tlie spool and the tripping lever noi-- mally holding said tripping lever out of. operative position; and meansoperable throu h the longitudinal movement of the ribbon or forcing said holding device to release said tripping lever.

b. In a typewriting machine, the combina,v tion with a pair of ribbon spools, of a self shifting endwise movable driver common to both spools and provided with a worm; a tripping lever normally tending to en a e said worm; a device normally holding said tripping lever out of active position; a device mounted to rotate with one of the spools and to be held in ino erative position by the coils of ribbon; an means called into action by said spool device when released by the ribbon for forcing said lever holding 7. In a typewriting machine, the combination with a pair of ribbon spools, of a driving shaft common to both spools; `a pair of' worms upon said shaft; a air of tripping levers tending to engage sai worms; devices normally holding said tripping levers out olf engagement with said worms, said holdin devices being arranged on the framewoi-"l and normally disconnected from `the spools; and means operating automatically through the 1ongitudinal movements of the ribbon for forcing said holding devices to release said tripping levers one at a time, wherebv said shaft is caused to drive the spools al- A ternately.

.8. In a typewriting machine, the combination with a pair of ribbon spools, of a driving shaft cmmon to both spools; a pair of worms on said shaft; a pair of tripping levers tending to engage said worms; devices normally holding said tripping levers out of `engagement with' said worms; a cam arranged at each spool; and means called into action through the longitudinal movements of t e ribbon for enablin said cams to force said iholding devices to re ease said levers,

9. In 'a typewriting machine,the combina-v tion with a pair of ribbon spools; a drivin shaft common to both spools; a pair o worms on said'shaft; a pair of tripping le- 'vers tending t-o engage said worms; a slid ing rod extendin from leach s ool to its tripping lever an holding said ever away from its worm; and means called into operation by the longitudinal movement of the ribbon for forcing said rod to release said lever.

10. In a typewriting machine; the combination of two ribbon spools; a rotary driving shaft having two gears and two worms mounted? thereon and adapted to be moved 'said-worm: a cani on one o endwise to gear it with one or the other of said spools; tripping fdevices tending to fall by gravity into engagement with sai worms release said gravity tripping devices.

11. In a typewriting machine, the combination of two ribbon spools; two horizontal shafts extending rearwardly froi'n said ribbon spools; a rotary driving shaft shift. able endwise to gear it with one or the other of said rearwardly extending shafts; two worms on said driving shaft' two teeth pivotally supported from the frameworky and tending to fall by gravity into enga ment with the worms on said shaft; two rod; each extending from a ribbon spool to one of said gravity operating teeth and each springpressed in the direction of its l `h to hold its gravity operating tooth out'o operation; and means controlled by the ribbon for forcin one or the other of said spring-pressed ro to release 'said gravity operating tooth.

12. In a typewritingfmac ine, the combination' of two ribbon spools; two shafts controlling the rotation of said ribbon s ools; a rotary and endwise movable self s iifting driving shaft adapted to be geared to one or the other of said shafts; a worm mountedon said driving shaft; an angled lever pivoted on the framework and aving a horizontally extending arm yadapted to more into engagement `with said worm and an upright arm; a `spring-pressed sliding i'od normally engagin said upriglitarin to hold said .lever out cfg enga ment with, the ribbon spools. said cam being controlled by the rib bon; and means wlieieby whenythe ribbon is nearly exhausted from the spool, said cam slides said rodA against the tension of its spring and releases said angled lever.

13. In a typewriting machine, the combinationof a ribbon spool; a cam mounted on said ribbon s ool and normally heldin inoperative position by the ribbon; a leverI pivoted on the lframework and adapted to engagbdd bly said cam when the latter is released y t e ribbon; a sliding rod posi? tively actuated by said lever; a tripping lever tending. to move to operative position but normally held in inoperative position by 4said rod; and a worm coperating with said tripping level", when said tripping lever moves to operative position, for reversing the feed of the ribbon.

14. In a ty' ewriting machine and inan automatic ri on reversing mechanism, the combination of a pair of 'ribbon spools; means for driving said s ools, a pair of worms; apaiiof tripping evers pivoted on the framework of the machine and adapted alternatively to engage said worms; and means controlled by the ribbon on the spools for controlling the operation of said tripping levers.

lo. In a typewriting machine and in an automatic ribbon reversing mechanism, the combination of a pair of ribbon spools', means for rotating the saine; a pair ot worms; a pair of gravity operating pins or teeth adapted alternatively lo engage said worms' devices between said. teeth and said ribbon spools; and ribbon controlled means on said spools for controlling said intermediate devices whereby when the ribbon runs out at either end one ofsaid pins drops by gravity to engage the Worm and efect revcrsal of the ribbon.

1G. ln a typewriting machine and in an automatic ribbonreversing mechanism, the combination of a pairof spools; means for turning said spools; a pair of worms; a pair of lever-controlled pins or teeth for engaglng said worms; an actuating devi'ce on each ribbon spool; a lever at each ribbon spool to be acted upon by said actuating dex'ioe; and a springpressed rod at each side of the ribbon mechanism between said last-mentioned lever and the lever' controlling the pin which engages the Worm.

li'. In a typewriting machine, the com.- bination of two ribbon spools for an inl; ribbon, a driving Shaft for driving said spools altermltively, and means for shifting said shaft lengthwise to gear it to one or the other of said spools7 said shifting means comprising two worms mounted on said shaft, means for engaging said Worms to cause the .shaft to be shifted, and txivoendwise' `inovable rods mounted on the framework of the machine and controlled by the ribbon` and each controlling a separate tooth adapted to engage one of said Worms.

Signed at Syracuse. in the county of Onondaga and State of New York, this '10th day 'of May -L l). [905. l

GEORGE A, Sllll.

Witnesses Huron C. Coon, Joux' S. Mrrcnnmi.

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