US1165942A - Type-writer ribbon-shift. - Google Patents

Description

APIfLlCA''lON HLED NGV. 22, 19H3.

Ymte@ Dm. 28, 1915.'

bHlLlD STATES THT PATENT OFFICE.

T 5 @EL EUG'IEN BUSCHMANN, OF CHEMNITZ, GERMANY, ASSIGNOR TO THE FIRM DE l.ai33"E-RIR WERKE VORM. WINKLHFER & JAENICKE Anm-GES., or SCHNAU,

@ZEE-WRITER RIBBONSHIFT.

Specification of Letters Patent.

Patented Dec. 28, 1915.

To @il wir/om it may concern:

Ee it known that Trrnooon EUGEN mit, subject oi' the Emperor of lerniany7 residing at Chemnitz, Saxony, Germany, have invented certain new and L rovenients in Type-l/Vriter Ribolf which the following is a speciof typewriting machines. The obieot oit the invention is to provide for a ii''tioe* of the ribbon with a, variable stroke, in order to render possible the proper we of ietters or signs which I happe; be situated or placed especially hi h on 'i'.ie type as compared wit the other letters or signs. For letters or signs of this ehem-eter, which oeeur for instance in Sanskrit tape, an increased iifting move ment of ribbon at right angles to its longitudinal direction is neoessary, because, by the normal lifting movement with the normai Width oi theribbon, the letters .situa ated especially high are not pinted. The

ribbon must therefore receive an additional lifting moi i .gna which mast be suilieieut, when usi 'to s situated in the high position are also printed. The apparatus according to this in vention is, however, when using biehrome ribbons, also capable of allowing certain signs or letters to appear in a different eo Avr. is e'iieeted when typing these signs, by automatically imparting an additional movement to the ribbon, which 1s suilieient to bring the other colored part of the band into the printing line of the in miestiomv This ir ntion is illustrated by Way of example in the accompanying drawings, in Whioh:--

Figure is a side elevation of the ribbon lifting apparato 1, and indicates its position ie frame of the typewriting relatively to tl Y machine. Fig. 2 is a corresponding view ze. i ts in a different working posishows diap'rammatieally three lons of tno ribbon relatively f. letters.

ame il on the bent rail of ded in a known way, .viting in order to print l n or letter, by means of f the normal width oi? the ribbomj" o ribbon so high that the letters the arm 2 and the intermediate member 3 which are iniiueneed by the shift key 4. A key lever 5 sets the type lever 7 in motion by means of the intermediate member 6, so that the type mounted in the end of the lever is raised and Caused to strike against the platen. The key levers 5 act also 1n the known manner on the universal bar 8, which is secured to a member 9, pivotally mounted on. a pin 10. On the pin 1,0 a lever arm 1l is so situated, that it cooperates with levers 12 and 12a of a bell crank lever 14 mounted on the roel; shaft 13. A bar l5 is linked on the upper arm of the bell crank lever 14, and the end of said bar l5 is also pivotally connected with a lever 17, which latter is mounted on the pin 16 on a projection of the shift frame 1, and drives the ribbon guide 1S. The bar 15 is provided with a. stop 19 adjustable by means of slots and screws, and also with a stationary stop 20. These two stops 19 and 2O are designed to cooperate with the bent stop 22 of the stopping member Q2, which is secured upon a locking pin 2l. of the shift frame 1. The stopping member 22 is under the action of a tension spring 28, which has a constant tendency to hold the striking member 22 in the position. shown in Fig. l. A pin 27 is secured to the intermediate member G, which pin is arranged Within a curved slot, provided at one end of a tension bar 24. The other end oi this bar is connected by means of a slot 30 and a pin 28 to a lever 29 arranged on the rock shaft 13. On the tension bar 24 is also situated a strikin pin 25, which is adapted to coperate witg a lever arm 22h secured to the rocking axle 21. The above described devices are situated only on the intermediate members of the corresponding parts for those type levers which carry signs or letters in an especially high position.

The operation is as follows: When typing normal letters or letters which do not require a special lifting movement of the ribbon on account of the letters or signs being situated in a high position on the type, the key lever 5 is pressed down in the usual manner and the different parte take the position shown in Fig. 1 in dotted lines, the type lever 7 being in its striking position. In this ease the ribbon-is brought into the printing position for the lower case letters or signs of he type corresponding' to ig. Sketch l. llt the upper case signs or letters are to be printed, then the lifting' oil the platen. and the ribbon into the upper position shown in 3 Sketch lll, must take place in the linown manner by pressing" on the shift lever fl. l'f, however, the upper signs or letters are situated especially high as is shown in then according to Sketch ll, the uppermost part of the letter or sign would not be printed. The ribbon and platen must have therefore an addi tional movement, so that it can assume the position shown in Fig'. 3 Sketch lill above upper case position, in order also to print the uppermost; part of the high letters or signs. When the shifting` of the platen has been performed and the hey lever is pressed, which corresponds to a type with unusually high letters or signs, then, because the tension bar 2e; is arranged on the correspond ing intermediate lever 6, said tension bar 24- projecting1 through a slot ot the shitting; trame 3. the front end is lifted andbiought into the position shown in t2. lhe curved slot 26 olf the tension bar 24: slides .relatively to thepin 27 and, on account of the ribbon guide lb itself, receive an additional movement. ln the position shown in Fig. Q, the striking,q pin 25 on the tension bar @il strikes against the lever arm 9.2 and rotates thereby the rocking pin 2l in ,counter Vclocltv/isc direction, so that the bent stop is moved out ol the path et the steil 2l) and the rod l5 can then perform an additional movement 'until the movable stop lf2 strikes against stop These stops 2 and l?) must be present in i' that the ribbon cannot be throvvn too The lev r m 22h provided `with a sloping surface its lovver end, which permits the pin to slide upward and assume pcs" in to the lett in iront of the lever arm si., should it accidentally come be y heath the end ot the lever arm 22h (as illustrated in dotted lines Fig'. l). rlhe additional stroke olf the ribbon guide can be regulated by means of the adjustable ar` rangement of the stop i9.

lt is clear that in all type and ltey lever arrangements, which are fitted with the above described apparatus, the ribbon can be raised to the height ot the uppermost letter or sign shown in Fig. 3 Sketch lll by means of the additional movement, and that these unusually high letters or signs will be also printed. Further it will be easily understood that the apparatus may also be `used for typing higher letters or signs in a different color, it7 a lil-chrome bon is used. When this is the case, the additional movement may cause for instance, the red part to reach the printing position tor the upper letters or signs.

llinally, it must be remarked that the ap paratus according; to this invention may be used :tor typewriting machines having a ribbon vibrator actuated from the universal bar and having this bar actuated by the notched rear ends of the ltey levers.

lclainu f l.. ln a typewriting machine, the combination with a type lever and ribbon mechanism normally vibrating; between a position of rest and normal printing; position; ot' means to automatically cause the ribbon mechanism to more beyond normal printing position upon the actuation of a particular type lever whose type printing' position is beyond the normal printing` line.

9,. ln a typewriting` machine the combination `with a platen and a platen shitting mechanism to control the position ot the platen; of a ribbon shitting'l mechanism operating normally between its position of rest and the printing position, and a type lever mechanism including means to shift the ribbon an additional distance, said means controlled from the platen shifting mechanism.

3. ln a typewriting machine, a ribbon shitting mechanism having a stop to normally control the movement ot said mechanism between a position, ot' rest and its 100 nintin'f oosition a nivoted sto 3 co ieratin l a l vwith the aforementioned stop, an adjustable stop, key lever actuated means to automatically more the pivoted stop into the path 1 1 oit the adjustable stop to permit said mech- *05 anism to have a movement greater than its lmal movement.

"in a typeivriting machine, a ribbon 9; mechanism normally operating been a position oit rest ant.. printing;` position, and means to automatically calme the shi o, said mechanism beyond said printing` position upon the actuation ot' hey lever and including' means to adjust the extent 'of said additional movement.

ln a typewriting' machine, ribbon shi'linn` mechanism includingl a reciprocable member having lifted stop and an adjustable stop, in combination with a pivoted stop 120,

a rran ged to coperatewith either ot the aforementioned stops and comtrolling;- the extent of movement ot' said mechanism, and a. type key mechanism including means to actuate said pivoted stop.

6. ln a typevvriting machine, a universal bar, a ribbon shifting; mechanism including a rock shaft actuated from said bar, a lever on said shalt, 'a stop bar pivotally connected to said lever and an adjustable stop on said the normal il@ ,tion 'with a, www@ cambi'- A 2a Sezcou a tm leva whose type 51nd 'e'ivp 145/" img); k *f son, ine

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