US884691A - Ribbon-feed mechanism for type-writers. - Google Patents

Description

No. 884,691. PATENTED APR. 14, 1908. J. VULKEE.

RIBBON F EED MECHANISM FOR TYPE WRITERS. APPLIOATION FILED FEB.12, 1906'.

2 SHEETS-SHEE'L 1.

7 -1 bun/u -PATENTE,D'APR; 14, 1908.

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APPLICATION FILED FEB 12, 1906 I N a? x Z &

w g Pg Is I ' each forward step of the carriage.

UNITED sTA'rns Pr-{TENT onnron.

JEAN voLKER, or NEU IsENBURc, GERMANY, ASSIGNOR 'ro THE FIRM or PETER WEIL & 00., or RODELHEIM, NEAR FRANnroar-oN-rnE-MAIN, GERMANY.

RIBBON-FEED MECHANISM FOR TYPE-WRITERS.

Specification of Letters Patent.

Patented April 14, 1908.

Application filed February 12, 1906. Serial No. 300,676.

lating to Ribbon-Feed Mechanism for Type v Writers, of which the following is a specifica- 'tion.

This invention relates to ribbon-feed mechanism for type writing machines by which the rotary movement of the spring-barrel indirectly imparts motion to the ribbon during The improved mechanism differs from previous mechanisms of this'kind in so fanthat it translates the rotary motion of the spring barrel into oscillatory motion for two pushrods provided with double clawkers adapted to impart motion to the ratchet-wheels keyed on the shafts of the ribbon-spools.

In order to render the invention clear, I will describe the same with reference to the accompanying drawings, in which:

Figure 1 is a plan of the improved intermediate mechanism for transmitting the motion. Fig. 2 is a side-view of the ratchet of one of the ribbon-spools showing the clawkers disengaged. Fig. 3 is'a similar view of the ratchet with the clawkers in engagement. Fig. 4 is a front view ofthe reversing bar and showing the push-rods in section. Fig. ,5 is a perspective view of the complete mechanism. Fig. 6 shows the spring barrel and "connected parts in operative positions during the forward movement of the carriage. Fig.

7 shows the same parts in their inoperative positions during the return travel ofthe carriage.

According to my invention I provide the rearside of the spring barrel m of the machine with teeth a rising at their inner sides towards the barrel shaft as is clearly shown in Fig. 5, the teeth being of a generally inverted V formation with rounded ridge. A lever 8 fast on a shaft t is arranged to reach with its free end as far as thetooth n and has a short "bend v by which it carries a pawl 0 whose motion is limited towards the rear by Ia stop 19 resting against theedge of the end *0. The free end of the pawl o is furmounted a spring r so constituted asto press the stop 19 against the end'c of the lever s. On the shaft 25 is fixed a short arm held by a tension spring a which is attached to arigid part of the machine and tends to press the lever s and its pawl 0 with roller g into the teeth a of the spring-barrel.

Presuming the spring barrel m to turn during the advance of the carriage in the direction of the arrow shown in Fig. 6, and that then the free end of the lever s with its pawl 0 is in the dotted position, the roller q resting in the hollow between the teeth, when the barrel turns, as stated, until the ridge of a tooth operates against the roller g and lifts the pawl'o, the stop 1) ofthe pawl o will be pressed against the corner of the bend 'o of the lever s and the latter will thus be moved outwards to theposition shown in full lines at Fig. 6. At the continuedmotion of the barrel m the roller g slides down the rear of the tooth by reason of the action of spring a. It will thus be obvious that the lever 8 receives oscillatory revolving barrel.

At the return travel of'the carriage, the spring barrel turns in the direction of the arrow shown in Fig. 7 and-the pawl 0 will at first enter the hollow of the. tooth as indicatedby dotted linesin Figs. 6' and 7 The further rotation of the barrel then causes the next tooth to press the pawl 0 rearward against the pull of its spring T but without lifting the lever 8, this being due to the stop 17 moving free on the, lever in the opposite direction into the position shown in full lines at Fig. 7. In this casethe pawl works idle and produces no oscillatory motion of the lever. Thelever s is situated at the side of the machine'and "has a lateral angular arms which is pivoted bya pin 0 to a push rod 7c. The rod k carries at its front end a plate 9 formed with central slot adapted to take round the vertical'spindle d of the ribbon spool, which spindle is fitted with a ratchet wheel bias shown. The plate g has four lugs e to form bearingsfor pivoted clawkers f.

and j which are arranged to operate in opposite directions. 'As there is a ribbon spool at each end of the machine for the successive win'din of the ribbon from one on to the other,it wi l be necessary to employ a similar ratchet mechanism for such spool.

For this purpose I prqyide a fixed lever arm motionfrom the 1o f engages in a tooth of the ratchet h and so at the other end of the shaft t. The leverarm 2 is connected by-a pin to a horizontal push-rod k. to whose free end is fixed a slotted plate 9 with lugs e forming bearings for clawkers f and 'f nately made to operate the ratchetwheel h on the spindle d that. engages in the slot of These are alterthe plate g When the latter is moved for ward by the'action of the lever s, the clawker 1 turns the same in the direction of the arrow shown in Figs. 1 and 3, while the clawker at the other side of the ratchet passes over the tooth thereof and. then drops into .the next i direction, while the clawker f moves v-idly. .20

tooth and prevents thewhe'el tiirning backward. At'the-retreating movement of the, plate 9 the clawkerf.becomesoperativeand turns the wheel h still further in the same over av tooth and thendrops behind. the

" sameto stop the wheel in that direction.

The clawkers 'andf" kee .in-enga ement with -the ri tcliizt teeth by their. oii n weight-providing thepositions of the push rods 7c and 7c allow. of it. By liftin the one or theother ofsaidro'ds; the claw ers will be heldon rests y,,-y and y, 1 respectively without touching the ratchets. In this manmi and so long as theplate isin its lowered position, the ratchet whee .71] will be conqtinuously turned in a uniformdirection until. the ribbon is fully wound 'on the spool on the shaft. The end of the ink ribbon may be differently, colored or-be fastened to a piece ofv different. ribbon so as to indicate when the .ribbon is unwound. When this occurs it will .belneces'sary to; reverse the movement, that is to say, the spindle d andv .ratchet wheel 7L must be set free while the I the ratcheth and at the same'time lower the ratchet h' has to bedriven. For thispurpose itwill be required to lift theirod g of rod k'with its late 9 on the ratchet-wheeljh. This isefiected by'means of a horizontal rail or bar a which is appropriately guided on the machine, say. by means ofslots a and pins a. Thebar a isplaced edgewi's'e and has. at, itsiuppleredge two shallowrecesses b and b at suc a' distance apart asto cause one. of the push-rods, suchask, to'be in the recess 1;, while the other push-rod leis away from its recess a. and rests on the top edge of the bar was shown in full lines, -.or reversed as indicated by dotted lines in Fig. 4. Thus, the rod k is in this position slightly lower than the rod is and'the cla'wkers f of the former are in engagement with the ratchet wheel, while the clawkers f and f are disen graged. The bar a canbe shifted endwise om-one position to another by means of a small handle a: at the front of the machine giving motion to such bar a through a rod i and crank arm w with slot and pin connec'- tion asshown, Thus the; ositionof the handle :0 indicates the direction of travel of the ribbon and needy only be turned sidewise at the proper moment order to reverse the movements ti6n,gwha't l claim'and desire to secure by Letters Patentis: 1

L'In a typewritenthe combination with the spring barrel of invertedV-shaped teeth barrel, ofaispring controlled leverkjeyed chine frame work-,the said lever cooperating with the teeth of the spring'barrel with the intermediary-of an antifrictionroller, means ,for preventing the lever frombeing operated Iwhenthe spring barrel rotates backward and meansfor converting the oscillatory motion described. l

the-spring barrel of teeth arranged onthe backside of the latter, of a spring controlledlever keyed upon-an oscillating shaft, ofa bent'part arranged on theupper'end of the lever, 'a spring controlled pawl pivotally connected to the said bent'part, an antifriction roller, carried on one end of the pawl and cobarrel, a stop on -the opposite end of the said pawl which normally rests against the said bent partand is adapted to cause the said the oscillating motion of the said lever to the ribbon spool spindles in the form of a rotary motionysubstantially as and for the purpose described. I 3.. In a typewriter the combination with a springbarre of teeth arranged on the rear side of the latter,-'of aspri controlled lever ing rods in and out of gear, substantia ly as and for the purpose set forth.

spring barre of teeth arranged on therear side of the latter, of a sprin controlled lever oscillated by the-said teet an oscillating shaft carryin the said lever, arms secured one to the said lever and the other to the said shaft on the opposite side of the machine, horizontal push-rods articulated to the said arms and carrying attheir free'ends slotted Having. now fully described said invdn 'forrned'with a broad base-.and a rounded ridge andarranged on the back side of the 2. In a typewriter the combinationwith operating with the teeth of 'the'said spring leverto oscillate during the forward traveli only .of the barrel, means for transmitting oscillated by the said 'teet an oscillating.

lever and the other to the said for alternately'throwing' one of the said ush 4. In a ty ewriter the combinationwitha upon a shaft pivotallysecured tothe ma of the said lever into arotary motion and transmittingthe latter to the. ribbon spool spindles substant ally as and for the purpose plates en aging the vertical ribbon spoolspindles, c awkers oppositely arranged on the said plates and adapted to rotate at each motion of the push rods, horizontal ratchet wheels keyed upon the ribbon spool spindles,-

rests for the clawkers when inoperative, and

"shaft on the opposite side of the machine,

horizontal push rods articulated to thesaid arms and carrying at their free ends slotted plates en aging the "vertical ribbon spool spindles, c awkers'oppositely arranged on the said plates and adapted to-rotate at each motion of the push' rods, horizontal ratchet wheels keyed upon the ribbon spool spindles,

rests for the clawkers when inoperative, a hand operated slide bar guided on the ma chine transversely to the said push-rods and adapted to support the latter on itsupper edge,- shallow recesses arranged in the said upper edge of the bar and so distributed as to cause one of the push rodsto be in its recess while the other push rod rests on the plain edge of the bar, substantially as and for the purpose described.

6. In a typewriting machine the combination of a spring barrel provided with. teeth and'adapted to rotate in reverse directions, ribbon spool spindles provided with ratchet v teeth, .rods' provided with pawls adapted to engage said teeth, means for throwing one of 40 said'rods and its pawls out of operative relaft tion with its' spindle, said means throwing.

the remaining rod and its pawl into operative relation with its; spindle, levers connpced sen i a e a,

t err aean connected with one of said levers and adapted to have rigid and yielding engagement-there'- with whereb rotation of said barrel in one direction w l serve ;to operate said lever through said rigid connection, said yielding cptnnection permitting said dog to operate 1 iln a typewriting machine the combma'; tion of a spring. barrel providedwith teeth and ada ted to be rotated in reverse directions, ribbon spool spindles rovided with ratchet teeth, rods provide with pawls adapted to engage said teeth, lev'ers 0011- I nected with said rods, and a spring actuated dog connected with one of said levers'and.

adapted to have rigid and, yielding engagement therewith when cooperating withsaid spring barrel whereby-rotation of said barrel in one direction will serve to operatev said -levers through said rigid connection, said yielding connection permitting said dog to operate idly vhen said barrel is rotated inan opposite direction.

8. In a typewriting machine the combinaand adapted to be rotated in reverse directions, ribbondslpool spindles, means for rotat mg said 5 in es, and a spring actuated dog 'tion of a spring barrel'provided with teeth associate with said means and adapted for engagementwiththe teeth of said barrel, said .dog having a rigid and yielding" engagement with saidme'ans whereby rotationof said barrel in one direction will serve to o erate said means through, said dog and rigi con: nection, said yielding connection-permitting said dog to operate idly during rotation of said barrel in an opposite direction.

In testimony, I have hereunto set my handin presence of two witnesses-.-

- ,voLKn'nr Witnesses 2 JEAN Gnome, CARL GBUND'.T

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