US2139095A - Typewriting machine - Google Patents

Description

Dec. 6, 1938. I J. F. PFEIFFER 2,139,095

v TYPEWRITING MACHINE Filed NOV. 16, 1934 4 Sheets-Sheet 1 Fig.1-

- I'NVEA/TOR JA cos FRITZ PFE/FFER 1 Dec; 6, 1938. J F. PFEIFFER TYPEWRITING MACHINE 4 Shets-Sheet 2 Filed Nov. 16, 1954 Dec. '6, 1938. J. F. PFEIFF ER v 9,

I TYPEWRITING MACHINE Filed Nov. 16, 1954 4 ShetsSheet s 605 ffPfeiffer Attorney Inv 775/ Patented Dec. 6, 1938 PATENT OFFICE 2,139,095 TYPEWRITING MACHINE Jacob Fritz Pfeifier, Zurich, Switzerland, assignor to. Wanderer-Werke vorm. Winklhofer & Jaenicke Akt.-Ges., Schonau, near Chemnitz,

Germany Applicatig: Novemberlii, 1934, Serial No. 753,381

DREISSUED Germany November 18,, 1933 10 Claims.

This invention relates to a device on commercial writing machines for simultaneously writing on foundation and front sheets guided independently of one another.

In known devices of this class the entries produced by writing on the front sheet were transmitted to the foundation sheet by means of sheets of carbon paper, the foundation sheet being either completely covered by the interposed sheet of carbon paper or, if the sheet of carbon paper was placed underneath it, chosen from transparent material, in which latter case the entries were made on the back of the foundation sheet in reversed writing and had to be read through it. In other known devices simultaneous writing on several superposed sheets was effected by means of one or several supplementary inked ribbons. These devices are, however, open to the objection that the various sheets must be fed by hand to the machine and, in quite a bothersome way, placed in proper position relative to the ribbons which, moreover, have to be moved by special manipulations.

The invention proposes to eliminate the drawbacks of the known devices and to provide adevice permitting rapid insertion of the various sheets in writing position and instantaneous writing immediately'after the introduction of the front sheets.

According to the invention, this object is attained by arranging on the carriage of the machine means provided with guides for feeding the front sheet in front of the foundation sheet already disposed in the machine and, further, a supplementary ribbon appliance with a ribbon movable in its longitudinal direction and extending over the line to be written, the supplementary ribbon appliance being in connection with the guides for the front sheet in such a way that the supplementary ribbon is always positioned between the foundation sheet and the front sheet brought by the guides on a level with the line "and placed against the foundation sheet.

By way of example, one form of the invention is illustrated in the accompanying drawings, in which Figure 1 is a front view of the device; Fig. 2, a top view thereof; Fig. 3, a partial front view of the device on an enlarged scale; Fig. 3a, a sec-- tion on the line 3-3, of Fig.3; Fig. 4, a side view of Fig. 3 in the direction of the arrow A; Fig. 5, a detail view of Fig. 1 on the scale of Fig. 3; Fig. 6, a section on the line 6--6, of Fig. 3; Fig. 7, a section on the line |-1, of Fig. 5; Fig. 8, a detail view in section on the line 8-8, of Fig. 14; Fig. 9, a section corresponding to that shown in Fig. 8

with the parts in changed position; Fig. 10, a section on the line Ill-l0, of Fig. 8; Fig. 11, a cross section of the device and part of the carria ge; Fig. 12, a side view of'the fastening means for the device; Fig. 13, a top view of'a detail of the means shown in Fig. 12; Fig. 14, a side view of the device with the line spacing mechanism; and Fig. 15, a top view of Fig. 14.

The drawings show the invention applied to a typewriter with all the parts of the latter omitted, which are not necessaryto understand the invention.

Referring to the drawings, i is an angle iron carrier, as indicated in Figs. 2 and 11, with the arms 2 and 3 firmly secured to its ends. The car- JUN 25 1940' rier I is provided with front sheet guides comof feed rollers l0 and II project pressed together by spring power and firmly arranged on-the two shafts l2 and I3, Fig. 11, which, by means of movable arms, not shown, are disposed on the carrier I and are in driving connection with one another by means of the pair of toothed wheels I4, Fig. .1. For turning the feed rollers I I], ll one of the two shafts l2, i3 is extended and fitted with a hand wheel l5, Fig. 1. Instead of the hand wheel IS, a control member provided with a selecting mechanism maybe used for driving the feed rollers III, M, whereby feeding of the front sheets up to a certain line that can be quickly selected at will becomes possible as disclosed in applicant's Patent No. 2,086,945, issued July 13,1937.

The attachment of the device is effected by means of the pins l6, as shown in Figs. 1, 12 and 14, which are disposed on the case shift frame 24' of the carriage 24, 24a and engage the arms rection of the arrow B in Fig. 12. The device is fastened in operative position by manually actuated means shown in Figs. 12 and 13, which comprise in the main a slide l1 displaceably disposed on'the holder 20 of the carrier l in the slots 2| and 22 by means of the screws l8 and i9. One end of the slide l1 forms the hook 23 and, in the position shown in Fig. 12, embraces a stud 25 secured to the carriage portion 24. A tension spring 26, Fig. 13, engaging with one end the slide l1 and with the other the holder 20 tends to displace the slide ll towards the left, as indicated in Fig. 12, and to press the hook-shaped end 23 thereof against the stud 25.

By a displacement of the slide I1 against the action of the spring 26 in the direction of the arrow C in Fig. 12 the hook 23 can be brought out of engagement with the stud 25 so as to permit turning the carrier I with the entire device about the pins or pivots I6 in the direction of the arrow B in Fig. 12.

To the rear wall 4 of the front feeding device a carrying plate 21 is secured, as indicated in Figs. 1 and 2, which is provided with means for carrying and moving the supplementary ribbon. On the rear sideof the carrying plate 21 and vertically extending thereto the supports 28 and 29 are arranged, as shown in Figs, 2, 8 and 9, in which the bosses 30, 3| of the spools 32, 33 for the supplementary ribbon 34 are rotatably positioned. The bosses 30, 3| are penetrated by an axially displaceable shaft 35 fitted with two catch pins 36, 31 which fit into the slots 38, 39 in the bosses 30, 3| and can be selectively brought into engagement therewith by axial displacement of the shaft 35, in which they are, however, disposed so that only one of them can engage the slots of the respective boss. The engaged pin connects the shaft 35 with the boss concerned, and the other boss can freely rotate on the shaft 35. A snap spring 42 cooperating with two grooves 40, 4| in the shaft 35 holdsthe latter in position. Two spring brakes 43, 44, as shown in Figsf l and 8, of which the brake 43 can be moved about the pivot 45, (Fig. 4) serve for preventing too easy running of the spools 32, 33 and thus the loosening of the supplementary ribbon. A crank 46 firmly disposed at one end of the shaft 35 serves for turning and axially displacing the shaft.

The rear side of the carrying plate 21 is further provided with means for automatically moving the supplementary ribbon 34. These means substantially comprise a ratchet wheel 41 rotatably disposed in a carrier 48 and secured against axial displacement. The boss 49 of the wheel 41 has a slot 50 which is engaged by a pin arranged in the shaft 35 to insure constant rotary connection between the shaft 35 and the wheel 41 notwithstanding the axialmobility of the shaft.

On a pivot 53 secured in a flap 52, Fig. 14, of the carrier 48 a two-armed lever 54 is arranged on whose arm 55 a pawl 56 cooperating with the ratchet wheel 41 is rotatably disposed. The other lever arm 51 contacts with a butt plate 58, as shown in Figs. 14 and 15, and a tension spring 59 secured with one end to the carrying plate 21 and with the other end to the arm 51 tends continually to press the arm 51 against the plate 58.

60 designates the usual .line spacing lever of the typewriter, which, on being actuated, acts by means of the arm 6| and the cushioning laminated spring 62 on a slide 63 which, by means of the pins 64, 65 and the slot 66, is displaceably disposed on the arm 61 of the carriage 24, 24a. The slide 63 is fitted with a bracket 68 to which the usual line spacing pawl 69 and the butt plate 58 are secured. A compression spring supported by the arm 61 of the carriage and the slide 63 tends to return the line spacing lever 60 after operation to its initial position.

The front side of the carrying plate 21 is provided with a guiding device for the supplementary ribbon 34, as indicated in Figs. 1 and 3 to '1, which consists chiefly of the two ribbon carriers 1| 12 adjustably secured to the carrying plate 21 by means of the screws 11, 10, 19 and 80 disposed in the slots 13, 14, and 16. The ribbon 34 unwinding for example from the spool 33 passes through the slot 8| to the front side of the left carrier 1|, as shown in Figs. 1 and 3, and, by means of the obliquely arranged guide slot 83, is reversed 90 and thus guided in the length of the line parallel to the platen. An oblique slot 84 in the right-hand ribbon carrier 12, Fig. 5, corresponds to the slot 83 and deflects the ribbon 34 from its horizontal back to vertical direction, whereupon it is guided through the slot 82 to the receiving spool 32.

On the front side, the supplementary ribbon 34 is covered over the entire line by a protective band 85 relative to the front sheet. The protective band 85 consists of a thin material possessing great tensile strength and being preferably transparent like Celluloid or similar substances, and is provided at its ends with the loops 86, 81 shown in Figs. 6 and 7 for attachment to the hooks 88, 89, one of which is disposed at one end of a double-armed lever 9| movable about a pivot 90. A tension spring 92 secured to the other end of the lever 9| and to the ribbon carrier 1I tends to keep the protective band 85 tensioned which is held in position directly in front of the supplementary ribbon 34 by the guide hooks 94, 95 arranged on the ribbon carriers 1|, 12.

96, 91 designate two elbow levers disposed on the pivots 98, 99 on the carrying plate 21. Two sides of these levers 96, 91 are connected by a rod I00, and the other sides by the forks IOI, I02 and thepins I03, I04 are united with the ribbon carriers 1|, 12.

On both sides of the carrier arms 2, 3 means for balancing the weight of the entire device are provided, as indicated in Figs. 2, 4 and 12. For this purpose, the arms 2, 3 have secured to them the sleeves I05, I06 wherein the supports I 01, I 08 are displaceably arranged, and the sleeves as well as the supports are provided with the spring carriers I 09, I I0 engaged by the tension springs III, II2. When the device is in operative position, the supports I01, I08 rest on the carriage frame 24a and the springs I I I, 2 are tensioned and tend to lift the platen II3, Fig. 11, to ether with the device from the non-shiftable part 24a of the carriage, so that the weight of the device has no disturbing effect during the shifting of the part, 24 of the carriage, which carries the platen H3 and the device.

Referring particularly to Fig. 12, the shiftable part 24 carried by the platen I I3 is supported by the supports I01, I08 influenced by the springs III, II2 on the non-shiftable part 24a of the paper carriage and as a matter of fact by means of the slide I1 on the parts I, 2, 3. The slide I1 has a hook 23 which grips the stud 25 which is secured on the .shiftable part 24. The springs III, II2 tend to lift the parts I, 2, 3 and the slide I1 secured thereto and also the carriage portion 24 above the hook 23 and stud 25 relative to the rigid paper carriage part 24a.

Below the platen I I3 the usual plate 4 for uiding the foundation sheet II5 to be inserted from the rear around the platen I I3 is provided. Below the guide I and the feed rolls I2I, I22 for the foundation sheet, which pass through the guide II4, a second guide II6 for the front sheet 9 introduced from the front side of the machine is arranged, it being possible of course simultaneously to insert a plurality of foundation and front sheets. correspondingly, the number with only one foundation and front sheet and only one supplementary ribbon merely for the sake of clearness. Fig. 11 shows the regular ribbon II! of the typewriter and a type bar H8 in front thereof. The device functions as follows:

By displacing the slide II, Fig. 12, in the direction of the arrow C the fastening device is re-' leased in the manner described, whereupon the carrier I together with the entire device is moved about the pivots I6 in the direction of the arrow B, Fig. 12, into the chain-dotted position in Fig. 11. In this position, the foundation sheet H5 is introduced into the machine from the rear over the guide H4 and around the platen H3. I he device is then turned down and brought into operative position in which it is secured by the fastening means I! to 25. The front feed sheet H9 is inserted from above in the funnel formed by the guides 4 to 'I and by turning the feed rolls I 0, I I by means of the hand wheel I 5 or another control member advanced until a certain line is in register with the line of the foundation sheet H5. The guides 4, 5 are preferably bent towards the platen H3, and the supplementary ribbon 34 is arranged underneath the guides 4, 5 in such a Way that the descending front sheet H9 enters the space between the supplementary ribbon 34 and the regular ribbon III, the supplementary ribbon 34 being thus safely positioned on a level with the line between the foundation sheet H5 and the front sheet H9 placed by the guides 4, 5

ing of the front sheet H9 are effected in an extraordinarily simple and rapid manner. 1

When the line space lever 68 is operated in the direction of the arrow D, Fig. 15, the butt plate 58 moves in the direction of the arrow E, engages the arm 5! and turns the lever 54 whereby the ratchet whee-l 41 and the shaft firmly connected therewith are moved a certain distance in the direction of the arrow F by the pawl 56. If, as shown in Fig. 8, the catch pin 31 is in engagement with the adjacent boss 3|, the rotation of the shaft 35 will cause the spool 33 to move also and to wind up the supplementrary ribbon 34, whereas the spool 32 is turned in opposite direction by the ribbon 34 unwinding therefrom.

The above-described intermediate members 41 to 58 bring it about that the operation of the line space lever 60 causes the supplementary ribbon 34 to be moved in its longitudinal direction. The. ribbon 34 can be moved also by turning the crank 46.

When the ribbon 34 has been completely wound up on the spool 33, axial displacement of the shaft 35 in the direction. of the arrow G, Figs. 8 and 9, will cause the catch pin 36 toengage the boss 38 and, simultaneously, bring the pin 3'! out of engagement with the boss 3|, so that at the rotation of the crank 46 or ratchet wheel 4| the protective band 85 prevents writing on the back of the front feed sheet I I9.

When not in use, the entire device, after release of the fastening means II to 25 and of a simple locking mechanism, such as the button I6a (Figs. 12 and 14), which is attached to one of the pivots I6, can be easily lifted off from the machine and returned thereto.

In the position shown in Fig. 1 the supplementaryribbon 34 is in writing position in front of the platen I I3. When the bell crank 96 is moved in the direction of the arrow H, Fig. 1, by means of the knob I20, the ribbon carriers I I, I2 and thus the ribbon strip on the .level of the line will be raised and brought out of range of the line, so that the adjusted type line of the foundation sheet H5 will become visible. At this adjustment of the supplementary ribbon 34 entries can be made on the front feed sheet I I9 without causing them to appear on the foundation sheet I I5.

By means of an additional device, this adjustment of the supplementary ribbon 34, i. e., the raising and lowering of the ribbon carriers II, I2, can be made automatic in dependence upon the working motion of the carriage passing from the right to the left, as indicated in Fig. 1. For this purpose, the fixed machine frame carries for instance a bar or track I23, as shown in Fig. 1,

' which approximately corresponds in length to the width of the sheet and, at various places, is provided with the attachable adjusting stops I24, I25. During the working motion of the carriage the stops I24, I25 act on the two levers I26, I21

rotatably disposed on the carrying plate 21 of the frame I, 2, 3, which when the carriage moves strike with their movable end pieces I28, I29 against the corresponding stops I24, I25. The

- levers I26, I21 with their end pieces I28, I29 and the adjusting stops I24, I25 are staggered relative to one another in the direction of motion of the carriage, i. e., in the longitudinal direction of the track I23, so that the end piece I28 of the lever I25 cooperates only with the stop I24 and a the end piece I29 of the lever I2'I exclusively with the stop I25. The adjusting stops I24, I 25 at tached to the bar I23 are preferably constructed so that they-jean, cooperate also with the other and piece I29 on" I28 simply by being turned over and re-attached, and they can then have the same form, differing merely in the manner of attachment to the bar I23. The end pieces I28, I29 are constructed and arranged on the levers I26, I21 in such away that during the return of the carriage from the left to the right, Fig. 1, they will pass lightly over the adjusting stops I24, I25 without causing any motion of the levers I26, I21.

Only the working travel of the carriage from the right to the left, as indicated in Fig. 1, will bring though in opposite direction. The lever I26 possesses a free arm I32 whose forked end engages a pin I33 of the ribbon carrier I2. When, therefore, the end piece I28 strikes the stop I25 and the lever I2! is moved' anti-clockwise, the lever I26, owing to the toothed wheel connection I3I, I30, will be turned clockwise and the ribbon carrier I2 together with the ribbon carrier II connected therewith and the supplementary ribbon 34 will be lifted from writing into inoperative position. Simultaneously, the end piece I28 of the lever I26 will be moved into the path of the corresponding adjusting stop I24 and, during further motion of the carriage in working direction, strike against the stop I24, so that the lever I26 will be turned anti-clockwise and the ribbon 34 lowered into writing position.

By means of the attachable adjusting stops I24, I automatic engagement and disengagement of the ribbon 34 can be effected'at predetermined points of the carriage motion so as to make entries only in certain columns of the front feed sheet II9, whereas in other columns both sheets are simultaneously written on without requiring any manipulation on the part of the writer.

I claim:-

1. A commercial writing machine, including a platen carriage, means for feeding and holding inner work sheets around the platen of the machine, a detachable paper carrier comprising guides and feed rollers for inserting and feeding front sheets in front and independently of the inner sheets and a frame mounted on the platen carriage, a main ribbon, at least one supplementary ribbon, ribbon carriers for said supplementary ribbon, said guides and feed rollers and ribbon carriers being arranged on said frame to guide and feed the front sheets between the main supplementary ribbons by rotating said feed rollers, and means forming a part of the paper carrier for supporting said frame on said platen carriage.

2. A commercialwriting machine according to claim 1, in which said guides and feed rollers and said ribon carriers are arranged to provide for said front sheets a path of travel extending between the main and the supplementary ribbons and through the writing position along which path said front sheets are moved by rotation of said rollers.

3. A commercial writing machine according to claim 1, in which means are included for moving the supplementary ribbon into and out of operative position by means of the carriage in dependence on the letter feed position of the latter.

4. A commercial writing machine according to claim 1, in which means are included comprising stops settable in any desired position along the transverse path of the carriage for moving the supplementary ribbon into and out of operative position.

5. A commercial writing machine according to claim 1, in which a fixed bar extending parallel to the transverse path of the carriage and having a series of stop-retaining means, and stops, are provided, settable in any of said retaining means said stops cooperating with the traverse of the carriage to move the supplementary ribbon into and out of operative positions at predetermined points in the traverse of said carriage.

6. A commercial writing machine according to claim 1, in which a. fixed bar extending parallel to the transverse path of the carriage and having a series of stop-retaining means, stops settable in any of said retaining means, and two abutment members, are provided, cooperating with said stops during the traverse of the carriage, one of which members controls movement of the supplementary ribbon into operative position at the level of the typing line and the other of which members controls movement of the said ribbon out of the typing line.

7. A commercial writing machine according to claim 1, in which a fixed barextending parallel to the transverse path of the carriage and having a series of stop-retaining means, stops settable in any of said retaining means, and two abutment members, are provided, cooperating with said stops during the traverse of the carriage, one of which members controls movement of the supplementary ribbon into operative position at the level of the typing line and the other of which members controls movement of the said ribbon out of the typing line, the abutment members and the parts of the settable stops being arranged in relatively oposite position in the direction of traverse of the carriage.

8. A commercial writing machine according to claim 1, in which said last-mentioned means comprises a pair of pins arranged coaxially to each other.

9. A commercial writing machine according to claim 1, in which said last-mentioned means comprises a pair of pins arranged coaxially to each other and a button provided at one of said pins for securing the frame upon the pin.

10. A commercial writing machine according to claim 1, in which said last-mentioned means comprises a pair of pins arranged coaxially to the platen.

JACOB FRITZ PFEIFFER.

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