US1973036A - Typewriting machine - Google Patents

Description

Sept. 11, 1934. FJBECKER TYPEWRITING MACHINE Filed June 16. 1932 2 Sheets-Sheet l luvamon:

Sept. 11, 1934. F. BECKER TYPEWRITING MACHINE Filed June 16, 1932 2 Sheets-Sheet 2 NdE INVENTOR: gu ATTOR Y.

Patented Sept. 11, 1934 NETED STATES PATENT OFFICE TYPEWRITING MACHINE Application June 16, 1932, Serial .No. 617,575

21 Claims.

Thisinvention relates to automatic line-spacing mechanism for typewriters, and provides for line-spacing of greater extents than the double or triple spacing which the usual line-spacing mechanisms afford.

A feature of the invention resides in obtaining the extra wide spacing by automatically repeated operation of the regular line-spacing mechanism.

The device is particularly useful in typing certain reports, as, for example, stockholders lists, in which the separate accounts are spaced ver tically of the sheet, say about one inch apart, in order to aiiord, in one column, room for the customers name, address and other data, all initially typed in lines, one above the other, in the vertical space allotted for each account. In side columns, there are typed from time to time, subsequently to the initialtyping of all the customers names, single-line entries, such as number of shares held, amount of dividends, or other data.

When typing these single-line entries 'for the several accounts on a sheet, it is necessary, considering the aforesaid illustrative one-inch spacing between accounts, to line-space the platen six line-space units after each entry, each unit being of a standard width of one-sixth of an inch. In the Underwood bookkeeping machine which handles this class of work, the line-spacing operation takes place automatically during the power-driven return of the typewriter-carriage.

In carrying out the present invention for extra width. lin -spaces, it is contrived to use the means whereby the power-driven return stroke of the Underwood carriage operates the line-spacing mechanism at the end of said care -return stroke, said means being set forth in Patent No. 1,262,604, to Walsleben, dated April 9, 1918. The line-spacing mechanism proper is or" the type set forth in Patent No. 1,360,747, to Helmond, dated November 30, 1920, and includes the usual line-space lever at the left of. the carriage-frame. As set forth in said Patent No. 1,262,60, there are mounted on the carriage frame a rack, extending in the directicn of the carriage-run, and a pinion, the rack having abuttin connection with the line-space lever-arm, so that when said rack is moved endwi to right, the line-space lever is also mad, the abutting connection permitting indendent use of the line-space lever. The pinmeshes with the rack and travels along with carriage. As the carriage nears the end of its return movement the pinion encounters the end of a stationary rack and rides into mesh therewith, said stationary rack also extending in the direction of the carriage-run, on the side of the pinion opposite the carriage-rack. As the carriage proceeds toward the end of its return stroke, said pinion, now meshing with the stationary rack and being rotated by the movement of the carriage, imparts a corresponding movement to the rack on the carriage that engages the line-space lever, and consequently imparts a line-spacing stroke to the latter.

The stationary rack is mounted on the usual right-hand margin-gage which is adjustable laterally for different line-end positions. Said margin-gage also has associated therewith means for automatically terminating the powerdriven carriage-return movement according to the line-end position established by said gage. The line-spacing connections, namely, the aforesaid racks and pinions, are so arranged that the stroke of the line-space lever is completed at about the time the carriage-return movement is completed.

To provide for automatically repeated linespace strokes, it is contrived to place in tandem with the aforesaid stationary rack, movable with the right-hand margin-gage, an additional stationary rack, the two racks being spaced apart, endwise, from one another. Thus it will be seen that, in the carriage-return movement, the line spacing pinion on the carriage encounters two racks in succession. There is first effected a line-spacing stroke by means of the first rack engaged by the pinion, then a self -retraction' of the parts as the pinion traverses the space separating the two racks, and then an additional linespace stroke as the pinion encounters and runs along the next rack.

By setting the multiple line-space-unit adjuster for triple-unit spacing, there is thus provided by reason of the double stroke of the linespace lever a total line-spacing of the six units required in the aforesaid illustrative example. A total spacing of four units may be obtained 100 by setting said adjuster for double-unit spacing.

A further advantage resulting from repeated operationof the line-space mechanism is that the Wide line-spacing operation is done in easy stages, and there is therefore less tendency of the Work-sheets to creep thanif they were jolted ahead through a quick, large single rotation of the platen.

.to feed the work-sheets.

fore in mesh with the lastly-engaged stationary rack, the carriage-rack and line-space lever also remaining in advanced position. During the initial part of the movement of the carriage from the margin-gage in advance, that is, letter-feeding direction, the carriage-pinion and carriagerack are moved reversely as the pinion rolls over the stationary rack, this reverse movement per-- mitting the line-space lever and associated parts including the carriage-rack to return to normal position. Upon further movement of the carriage in letter-feeding direction, the pinion will encounter the first, that is, the additional sta tionary rack. Inasmuch as said pinion and the carriage-rack have already assumed their normal position, and are, therefore, incapable of further movement, it is contrived to mount said additional stationary rack so that it is automatically moved out of the path of the pinion as the latter encounters the same. Such mounting means for diverting the first stationary rack are also arranged so that said rack may be diverted manually at will. This is useful when instead of a' repeated line-space operation during the car" riage-return stroke it is desired to have a singleline-space operation. The means for throwing the stationary rack out of operative position may also be used to advantage with the single stationary rack heretofore employed, as, for e: ample, when, in the case of very short carriageruns, it is desired to line-space and return the carriage manually.

Other features and advantages will hereinafter appear.

'In the accompanying drawings,

Figure 1 isa sectional side elevation, of part of the typewriter-carriage and of the adjacent typewriter-frame, showing the arrangement of the line-spacing racks and pinion.

Figure 2 is a perspective view of the typewriter-carriage, showing the regular lines-pac ing mechanism in relation to the organization of the present invention.

Figure 3 is a perspective view, showing how the line-space stationary rack may be shifted out of effective position by a manual control.

Figures 4, 5, 6 and 7 are views looking at the front of the carriage, showing different phases in the operation of the invention. Figure 4 indicates the carriage at'that point of its return movement at which the first line-space stroke has been completed. Figure 5 indicates how the line-space lever, after the first line-space stroke, has returned to its normal position during the interval the line-spacing pinion on the carriage traverses the space between the stationary racks. Figure 6 indicates the completion of the second line-space stroke, the carriage having completed its return movement and the line-spacing pinion having been driven by the second stationary rack. Figure 7 indicates how the carriage moving in letter-feed direction is enabled to proceed past the first line-space rack, because said rack is so mounted as to be pushed aside by the line spacing pinion as said carriage so proceeds.

Referring to Figure 2, a typewriter-platen 10 is fastened to an axle 11 revolubly mounted in end members 12 of the usual case-shifting frame carried in letter feeding carriage 13. It will be understood that there may be the usual feedrolls (not shown) to co-operate with the platen Said carriage is propolled-in lettenfeeding direction by the usual spring-motor (not shown), the letter-feedin steps being controlled by means of the Underwood escapement-rack 14 co-operating with the usual escapement-devices 15. Means for returning the carriage by power may be of the type set forth in Patent No. 1,238,919, to Hoyt, dated September 4, 1917, and are conventionally represented by a rack 17 fastened to and extending lengthwise of the carriage. Meshing with said rack 17 is a pinion l8 slidable axially on a powerdriven shaft 19, so that it may be moved into and out of engagement with a toothed clutch- ;member 20, fastened to said shaft 19. Said pinion 13 is provided with a groove 21', in which there plays the end of an arm 22 of a springpressed lever normally latched in such position by latching means (not shown) that the pinion 18 is in a position in which it is disengaged from the clutch-member 20. Said latching means are tripped by means of a manually-operable key and also by carriage-controlled devices, all as set forth in said l-Ioyt patent. Figure 2 indicates the pinion 18 in engagement with the clutchmember 29 and rotating and moving the carriage in the direction of the arrows.

The carriage runs upon a front track 23 supported on side members 24 of the typewriterframework, the carriage having rolls 25 running in said track. A rear carriage-rail (not shown) also supports and guides the carriage.

The usual line-spacing mechanism includes a toothed line-space wheel 26 fastened to the plat en-shaft. A co-operating spring-pressed detentarm 27 carries a roll 28 which seats itself in the tooth spaces of the line-space wheel 26 to hold the platen. A line-space lever 29 pivoted at the left end of the carriage-frame 13 has a forwardly extending arm 30 provided with a finger-piece 31. The swing of said line-space lever 29 is limited by abutments 32 rising from the carriage-frame 13 and topped by a cover-plate 33. Extending sidewards of the arm 30 of the lever 29 is another arm 34 whereby said lever operates a slide 35 which serves to carry the line-space pawl 36. Said slide 35 is slidably retained in the end member 12 of the platen-frame and is urged forwardly to its normal position by a spring 37, which also serves to keep the line-space lever 29 in its normal position. The stroke of said linespace lever 29 and of the slide is uniform irrespective of rotating the platen through one, two or three line-space units. For determining the number of units through which the platen is to be rotated at each stroke of the lever 29, means are provided to control the engagement of the line-space pawl 36 with the line-space wheel 26. That is to say, said pawl normally withdrawn from said wheel 26, to permit independent rotation of the platen, is made to drop into said wheel at different points in the stroke of the slide 35. To this end the line-space pawl 36 has the usual cam-shaped end 38 reacting against a projection 40 extending from the side or" the settable arm 41.

With the position of the arm 41 set as indicated in Figure 3, the mechanism is set for rotating the platen three line-space units upon the full stroke of the line-space lever 29. It will be seen that with this setting, the linespace pawl will engage the Wheel 26 almost as soon as theslide 35 starts to move, because the projection 40 is in such position as to permit the immediate drop of said pawl 36. It will also be seen that if the projection 40 is moved rearwardly, there will be an idle portion at the beginning of the stroke of slide 35, the extent of the idle portion depending on the position of said projection i0, and determining the number of tooth-spaces the line-space wheel is advanced. The usual provision is made for setting the lever il and its pawl-controlling projection 40 at three stations corresponding to single, double, and triple spacing. To locate said lever 41 in any one of said three stations, there is provided a stationary spring-detent '42 formed to engage detent-depressions 44 in the side of a slide 45. One end of the detent-slide 45 is pivoted to and supported by the lever 41, the other end of said slide 45 being slotted at 47 so as to be guided and supported upon a stud 48 that supports the detent-arm 27.

The usual right-end margin-gage 50 is slidable along guide- rods 51, 52 to adjust the extent of the carriage-run. The guide-rod 51 has a series of letter-spaced locating notches 53 into which there seats itself a correspondingly formed spring-pressed retra'ctible arm 54 which is swingably mounted upon the margin-gage 50. Said margin-gage carries an abutment '55 against which a corresponding abutment 56 on the carriage strikes to limit the rightward, that is, the return movement of said carriage. Due to the usual properties of the escapeme'nt-mechanism, the carriage has a drop-back movement of between one and two letter-spaces after striking the abutment 55. Fastened to a rear vertical face of the margin-gage 50 is a rack 57, one end of said rack being fastened to said face, the rack, itself, projecting to the left of the gage in accordance with the arrangement of the parts and being bent over at a right angle at its outer end to form an car 58 slidably fitting the guiderod 51.

Another rack 59 is placed ahead of the rack 57 in tandem relation thereto and is spaced end wise from the latter as seen in the drawings, so as to form with said latter rack 57 two series of rack-teeth separated by a substantial gap. As will be described further on, said other rack 59 is also connected to the margin-gage 50 so as to be shiitable therewith.

(Jo-operating with the racks 59, 5'7 for actuating the line-space mechanism during a return movement of the carriage, there is mounted on said carriage an elongate rack-member 60 slidably retained by means of guiding devices 61, 62 mounted upon the carriage 13. The left end of said member is turned up at 63 to carry an adjustable screw-stud 64 whose projecting head forms an abutting connection with the arm 30 of the line-space lever. A lock-screw 66 abuts the inner end'of the screw-stud 64 to hold the latter in adjusted position. At the other end of said elongate rack-member, thereis a rack with which there meshes a pinion 6'1 rotatably mounted on a stud 69, Figure 1, projecting from an outer cover-plate 39 of the guide 62, the outer end of said stud being received in a hole '70, Figure 1, of the carriage-frame for support. The cover-plate 39 is bent at a right angle to overtop the rack 65 and a rear wall-plate 43 of the guide 62. Underlying the rack 65 is a spacer-plate 46. which together with the plates 39 and 43 is secured to the carriage by screws 49. The racks'59, 57, 65 are so arranged that the pinion 67, during the course of the carriage movement, may mesh with the teeth of the racks 59, 5'7. Figure 2 shows the carriage at that point of its return movement where the pinion 67 is about to be rotated by means of the first stationaryrack 59, it being understood that previous to the carriage reaching said point, the pinion 6'7 was at the left and free of said first stationary rack 59. As'the carriage then continues in its return movement the pinionfi'l,

now meshing with the rack 59, .is.rotated clockwise, thereby drawing the elongate rackmember 60 to the right and imparting aline-space stroke to the line-space lever :29. The length of the first stationary rack 59 is such that the line space lever will have been given its fulladvance stroke when the pinion 67 escapes from said rack.

As the pinion 6'7 escapes from the stationary rack 59 the parts of the line-spacing mechanism on the carriage will be returned to their normal positions by the pull of the extended springs 37 and 71, the latter spring pulling upon the elone gate member 60 and the former spring .37 pulling the slide 35 forwardly again. A stop-pin 72 projecting from the elongate rack-member 60 abuts the guiding device 61 to limit the movement and establish the normal position of said rack-member 60 by the spring '71. In said normal position a toothless gap 68 of the pinion 67 facilitates engagement of said pinion with the racks 57, 59. In this restoration of the parts, the pinion 67 will be rotated counterclockwise. This restoration of the parts takes'place in that portion of the carriage-return. movement in which the pinion 67 traverses the gap separating the stationary racks 59- and 5'7. The linespacing-mechanism parts having thus been restored during this interval, it is ready for another line-spacing operation which takes place as the pinion 67 encounters and rides over the stationary rack 57. As the pinion 6''! thus rides over the rack 5'7 and thereby'rotates, the elongate rack-member 60 is again drawn toward the right to operate the line-spacing mechanism. The parts are so proportioned that the. linespace lever 29 will again have received its full stroke when the stop 56 on the carriage meets the abutment 55 on the margin-gage.

Assuming that the carriage is being returned by power through engagement of the carriagereturning pinion 18 with the power-driven clutch-member 20, there takes place, just before the carriage-stop 56 meets the margin-gage abutment 55, a withdrawal of said carriage-returning pinion .18 from the power-driven clutch member 20. For effecting said withdrawal and thereby terminating the power-driven carriagereturn movement in timed relationship to the positions of the margin-gage. 50, there is disposed alongside of-thelatter, so as'to be shiftable therewith, to any of. said positions, a release dog '73, splined to the rotatable guide-rod 52 by means of a slotv '74 extending along said rod. The rotation of said dog 73 rotates the guide-rod 52 to operate alinkage (not shown), for actuating the arm 22 to withdraw the carriage-returning pinion 18 from the power-driven clutch-member 20, said linkage being fully described in the aforementioned patent to Hoyt.

For rotating the rod 52,-the carriage carries the usual tappet'IS which cams, down the rearwardly-projecting end .of the-dog 73 just before the carriage strikes the margin-gage abutment 55. After striking said abutment, the carriage drops back from one to two letter spaces as aforesaid. f;

The carriage is now inits normal line-beginning position, the elongate member 60 and. the line-spacing mechanism operated thereby being in advanced position, asrindicated inFigure 6, it being noted, however, that, in said Figure 6,

the carriage is shown. as not yet having dropped back the one .to. two letter-spaces. Even after such drop back the rack-member 69 and the line-space mechanism will still be in substantially advanced position. vAs the carriage here after moves in letter-feeding direction the line- Spacing parts will reassume their normal posi tions in response to the counterclockwise rota tion of the-pinion 67 as the latter rides to the left along and in mesh with the stationary rack 57. The parts will have completed their return to normal position when said pinion 67 moving leftward escapes from the rack 57. In the continued leftward movement of the carriage, the pinion 67 will encounter the other stationary rack 59. Inasmuch as said pirnon 67 and elongate rack1nember 69 connected thereto are now in their normal positions, further rotation of the pinion 67 is barred. However, to permit said pinion 67, in said continued leftward carriagemovement, topass the stationary rack 59, the latter is mounted so that it may-be pushed aside during said leftward movement.

To this end, the rack 59 is mounted upon the side of abar 77 whose one end is fastened to the rear face. of a block 78, which is slidable upon'the'guide- rods 51, 52, said block being generally similar to the body of the margin-gage 59 and being connected thereto and properly spaced therefrom by means of a bar 79 secured to said block '78 and said body of the margin-gage by screws 80. The other end of the rack-supporting bar 77 is bent at right angles to form an car 81 slidably fitting the guide-rod 51 like the ear 53 I of the stationary rack 57. For guiding and sup porting the stationary rack 59 so that it may be moved aside from carriage-pinion 67, said rack has spaced, inclined slots 82 terminating at their lower ends in extensions 83 that are parallel to the direction of the carriage-movement. Pro-- jecting from'the bar 77 are headed shoulderstuds 84 slidably fitting the rack-slots 82 and their extensions 83. A spring 86, anchored to the bar-77, urges thestationary rack 59 toward the right; so that normally the left ends of theslot-extensions 83 abut the shoulders of the studs 84 "to locate said rack 59.

It will be evidentfrom-Figures 2 and 4 that the slot-extensions 83 parallel with the direction of carriage-movement serve to lock the stationary rack 59 in the position in which the latter meshes with the pinion 67. That is to say, the rack 59 cannot be separated from the pinion 67 by side-thrust as the latter is driven by said rack 59. In the advance movement of the carriage, that is, movement in letter-feeding direction, the stationary rack 59 is first moved to the left when the pinion 67 strikes the right end or said rack, this leftward movement being without any edgewise displacement due to the direction ofthe slot-extensions 83. Further movement of the stationary rack 59, however, is accompanied by. a downward movement as the studs 84 meet theincline of the slots 82,so that, as seen in Figure 7, the tops of the'teeth of the pinion 67 finally skipover and past the tops of the teeth of theastationary' rack 59. When the carriage has proceeded far enough to the left, so that the pinion 67 is free of the stationary rack 59, the

.latterassumes' its normal position again, indicated in lfi gure 2, under the pull'of the spring The stationary "rack 59 may also bev pushed aside atwill, so as to render itinoperativedurs ing thecarriage-returnmovement, as, for example, when it is desired to only operate the line-spacing mechanism once during such movement. The stationary rack 59 is accordingly provided with a tail 88 Whichmay be formed as shown so that it maybe acted upon by a'fingerlever 89 having an arm 90 engaging said tall 88 and extending rearwardly and downwardly from a supporting block 92. Said block 92 may be attached to the rear side of the bar 79 by screws 93, and may be drilled to fit over the guide-rod 52, a screw 94 threaded into the block pivoting the finger-lever 89. The front face of the bar 79 may have the legends On and Off to indicate that the stationary rack 59 is in effective or inefiective position. For limiting the swing of the finger-lever 89in one direction, the: upper edge of the bar may have a stop-pin 95 against which an arm or finger-piece 96 of the finger-lever 89 abuts when said arm is swung to the left as indicated in Figure 2. It will be seen from Figure 2 that with'arm .96swung to the left to the On position, the arm 99' of said finger-lever is withdrawn-from the tail 88 of the stationary rack 59, which accordingly assumes its efiective position under the pull of the spring 86. Shifting the arm 96 of-the finger-lever 89 to, the right will cause the end of the arm to 3 rightward swing of the arm 96 is limited by the abutment of the side of said arm 90 with the bottom of the notch 99 which forms said top portion 97. Said top portion 97 may interlock with the end of the arm 90' of the finger-lever 89 to thereby hold the stationary rack 59 in its ineffective position. The pivoting screw 94 for said lever 89 may'yieldably bind the latter in frictional contact with the supporting block 92,

thereby conducing to the stability of the rack 59 in its ineffective position and also conducing to the stability of said lever in its Oif position.

The tall 88 may have an inclined edge 199 along which the arm 90 of the finger-lever rides as said arm pushes the stationary rack 59 forward and downward. Figure 3 shows the finger-lever 89 adjusted to the Off position to render the stationary rack ineffective.

The right margin-gage proper is similar in construction to the usual Underwood margingage and carries a pointer 192 that co-operates with the usual scale 103 for facilitating the setting of said margin-gage, said scale being attached in the usual manner to the carriagerail 23. For retaining the carriage-return release dog 73 in juxtapositionwith the side of the margin-gage 50, there may project from the rear face of the bar 79 a pin 104, Figure 2, which engages the side of the dog 73.

Sometimes the carriage'is returned in the us ual manner, that is, by gripping the finger-piece tion, the line-Spacing-mechanism proper maybe of standard form.v It will also be noted, therefore, that machines already in use may be easily and economically adapted for wide line-. spacing by merely substituting, for the usual margin-gage having a single rack, another margin-gage having the novel multiple rack organization.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination with a carriage, of a line spacing device upon said carriage, including a rack which extends in the direction of the run of the carriage, a pinion upon said carriage meshing with said rack, a rack stationary relatively to the carriage movement, means mounting said stationary rack upon the machineframe, so that. it may be moved, transversely of its pitch-surface into and out of the path of the pinion, said stationary rack being efiective to engage said pinion at the final portion of the return, movement of the carriage and being keyed to the mounting means so that in its eifective position it is positively sustained against the pinion thrust during line-spacing, and a manually-operable shifter for moving said stationary rack into and out of effective position at will.

2. The combination with a typwriter-carriage, of line-spacing mechanism thereon including a rack extending in the direction of the run of the carriage, a pinion on said carriage rotatable to draw said rack in line-spacing direction, a rack stationary relatively to the carriage movement for engaging said pinion during a certain portion of the return run of said carriage, said mechanism, carriage-rack, and pinion being spring-restored to normal position as said pinion leaves the stationary rack at the end of said portion of the carriage-return run, and means whereby said pinion is enabled to pass idly over the stationary rack, without moving said carriage-rack, during the advance movement of the carriage.

3. The combination with a; typewriter-carriage, of line-spacing mechanism thereon including a rack extending in the direction of the run of the carriage, a pinion on said carriage rotatable to draw said rack in line-spacing direction, a rack stationary relatively to the carriage movement for engaging said pinion during a certain portion of the return run of said carriage, said mechanism and carriage-rack'being spring-retracted to normal position as said pinion leaves the stationary rack at the end of said portion of the carriage-return run, and means yieldably mounting said stationary rack so that it is pushed aside by the pinion during the advance movement of the carriage.

4. The combination with a typewriter-carriage, of line-spacing mechanism thereon including a rack extending in the direction of the run of the carriage, a pinion on said carriage rotatable to draw said rack in line-spacing direction, and a rack stationary relatively to the carriage movement for engaging said pinion during a certain portion of the return run of said carriage, said mechanism and carriage-rack being spring-retracted to normal position as said pinion leaves the stationary rack at the end of said portion of the carriage-return run, said stationary rack being mounted so that it is spring-pressed into normal position from which it is pushed aside by the pinion during the advance movement of the carriage.

5. The combination with a typewriterecarriage, of line-spacing mechanism thereon including a rack extending in the, direction of the run of the carriage, a pinion on said carriage rotatable to. draw said rack in line-spacing direction, a rack stationary relatively to the carriage movement for engaging said pinion during a certain portion of the return run of said carriage, said mechanism and carriage-rack being spring-retracted to. normal position as said pinion leaves the station? ary rack at the end of said portion, of the care. liege-return run, and me s m n in i ing said stationary rack, for endwise'and resultant sidewise movement, enabling said pinion, without rotating, to push said stationary rack aside during the advance movement of the carriage. v

6. The-combination with a typewriter-carriage, of line-spacing mechanism thereon including a rack extending in the direction of the run of the carriage, a pinion on said carriage rotatable to draw said rack in line-spacing direction, a rack.

stationary relatively to, the carriage movement for engaging said pinion during a certain pore tion of the return run of said carriage, said mechanism and carriage-rack being springere; tracted to normal position as said pinion leaves the stationary rack at the end of said portion of the carriage-return run, means yieldably mounte ing said stationary rack so that it is pushed aside by the pinion during the advance move? ment of, the carriage, and manually-operable means for so pushing said stationary rack aside to silence the operation of the line-spacing mechanism as efiected by means of said stationary ra ls- V '7. The combination with a typewriterecarriage, aplaten, and line-spacing mechanism operable in individual strokesfoi a settable margin gage limiting the return movement of vsaid carriage; and means carried by said margin-gage for op: erating said line=spacing mechanism by the movement of said carriage in the return run of said carriage; said means being settable for 615-. iecti ng one or a plurality'of line-spacing strokes during said run.

8. The combination with a letter-feeding carriage, of a selfrestoring reciprocatory linespacing device upon said carriage including a rack which extends in the direction of the carriage travel a pinion upon the carriage meshing with said rack, means t n ag said p ni n at paced stages of the fi a p rti n of t er turn movement of the carriage and cause the pini to be o ted repea d y on its axis by themovemen of th ar as u in aid final portion of its return movement, to thereby re peatediy actua e helin pa ing d v nd mar in ga e ad u ab e to rm n t e. posit o at Whichth carriag is stopped at the. complet on o its r rn t avel, said me ns adjustable with t margina e whe by th n -spac ng device will have b en perat d epea e y when the carria has be n e u ned to sa d ease sai mean a r n ed relatively to a d p nionse as n t to repea p ration f the l ne spacine device by the advan e mov ment of sa ca r e from aid ma ein ea e a d so a no to mpede sai advan e. 7 t r 9,. In atypewritins mach ne, th mb a i n of a carria e. a platen there n lin pacin mechanism inc udi n operating ever, a d a device for actuatin said lever re eated y, lled into play automatically by the carriage after the return movement of the latter is commenced, said device including a rack on said carriage connected to said lever, a pinion on" said carriage to travel therewith and meshing with said rack, a plurality of stationary racks, aligned endwise and spaced apart, to successively mesh with said pinion and repeatedly rotate the same during the return movement of the carriage, and means whereby the carriage by its advance movement causes a stationary rack to be displaced from the path of the pinion while the latter in said advance movement passes said stationary rack.

' 10. In a typewriting machine, the combination of a' carriage, a platen thereon, line-spacing mechanism including an operating lever, and a device for actuating said lever repeatedly, called into play automatically by the carriage after the return movement of the latter is commenced, said device including a rack on said carriage connected to said lever, a pinion on said carriage to travel therewith and meshing with said rack, a plurality of stationary racks, aligned endwise and spaced apart, to successively mesh with said pinion and repeatedlyrotate the same during the return'movement oi the carriage, the pinion remaining in mesh, at the end of the carriagereturn run, with the last stationary rack, said last static-nary rack thereby effecting restoration of said mechanism during the initial part of the advance movement of said carriage, and means whereby the carriage in its further advance causes any stationary rack, other than said last rack, to be displaced relatively to the pinion to permit idle passage of the latter in said further advance.

11. In a typewriting machine, the combination of a carriage, a platen thereon, line-spacing mechanism including an operating lever, and a device for actuating said lever repeatedly, called into'play automatically by the carriage after the return movement of the latter is commenced, said device including a rack on said carriage connected to said lever, a pinion on said carriage to travel therewith and meshing with said rack, and a plurality of stationary racks, aligned endwise and spaced apart, to mesh with said pinion and repeatedly rotate the same during the return movement of the carriage, said pinion remaining in engagement with the last stationary rack it'engages at the end of the return movement of said carriage, means being provided whereby said pinion, during the advance movement of said carriage, overrides the other rack-teeth without rotation, inasmuch as the restoration of said line-spacing mechanism takes place as said pinion runs along said lastengaged rack and rotates at the beginning of said advance movement.

12. The combination with a traveling carriage having a revoluble' platen, of a self-restoring reciprocatory line-spacing mechanism on said carriage including an operating pinion, a rack stationary relatively to the carriage for engaging said pinion at a certain portion of the return run of said carriage to thereby operate the line-spacing mechanism, means mounting said rack so that it is capable ofa certain degree of endwise movement and a resultant edgewise movement for moving said rack into and out of the path of said pinion, said pinion-passing beyond said rack in said carriage-return run, means normally causing said rack to be in meshing position preparatory to its engagement by the pinion in the return run of said carriage,

said pinion pushing said rack endwise and aside as it passes thereover in the advance movement of said carriage, and a manually-shiftable device to move and hold said rack out of efiective position.

13. The combination with a traveling carriage having a revoluble platen, of a self-restoring reciprocatory line-spacing mechanism on said car riage, including an operating pinion, a pair of racks stationary relatively to the carriage movement, aligned endwise and spaced apart for repeated operation of said pinion; to thereby repeatedly operate the self-restoring line-spacing mechanism, means mounting said racks so that the last one engaged by said pinion in the carriage-return run is fixed, and so that the other rack is capable of a certain degree of endwise movement and a'resultant edgewise movement for moving said other rack into and out of the path'of said pinion, and means normally causing said other rack to be in meshing position, said pinion remaining in mesh with the said last-engaged rack, said line-spacing mechanism being therefore restored as the pinion runs over the latter rack at the beginning of the carriageadvance movement, said pinion pushing the other rack endwise and aside as it passes thereover in the continuation of said advance movement.

14. The combination with a traveling carriage having a revoluble platen, of aseli-restoring reciprocatory line-spacing mechanism on said carriage, including an operating pinion, a pair of racks stationary relatively to the carriage movement, aligned endwise and spaced apart for repeated operation of said pinion, to thereby repeatedly operate the seli-restoring line-spacing mechanism, means mounting said racks so that thelast one engaged by the pinion in the carriage-return run is fixed, and so that the other rack is capabie of a certain degree of endwise movement and a resultant edgewise movement for moving said other rack into and out of the path of said pinion, means normally causing said other rack to be in meshing position, said pinion remaining in mesh with the said last-engaged rack, said line-spaoing mechanism being therefore restored as the pinion runs over the latter rack at the beginning of the carriage-advance movement, said pinion pushing the other rack endwise and aside as it passes thereover in the continuationv of said advance movement, and a manually-shiftable device to moveand holdsaid other rack out of effective position to eliminate repetition of the f line-space stroke at will.

carriage, including an operating pinion, a ,mar- 11":

gin-gage adjustable to different positions ,to limit the return movement or" said carriage, a pair of racks mounted for movement with the margin-gage as the latter is shifted to diiierent positions, said racks being stationary relatively tain degree of endwise movement and a resultant edgewise movement for moving said other rack into and out of the path of said pinion, ,and

its

means normally causing said rack to be in meshing position, said pinion remaining in mesh with the said last-engaged rack, said line-spacing mechanism being therefore restored as the pinion runs over the latter rack at the beginning of the carriage-advance movement, said pinion pushing the other rack endwise and aside as it passes thereover in the continuation of said advance movement.

16. lhe combination with a traveling carriage having a revoluble platen, of a self-restoring reciprocatory line-spacing mechanism on said carriage, including an operating pinion, a margingage adjustable to different positions to limit the return movement or said carriage, a pair of racks mounted for movement with the margingage as the latter is shifted to different positions, said racks being stationary relatively to the carriage movement, aligned endwise and spaced apart for repeated operation of said pinion, to thereby repeatedly operate the self-restoring line-spacing mechanism, the rack last engaged by said pinion in the carriage-return movement being fixed, the other rack having a mounting which renders it capable of a certain degree of endwise movement and a resultant edgewise movement for moving said other rack into and out of the path of said pinion, means normally causing said rack to be in meshing position, said pinion remaining in mesh with the said lastengaged rack, said line-spacing mechanism being therefore restored as the pinion runs over the latter rack at the beginning of the carriageadvance movement, said pinion pushing the other rack endvrise and aside as it passes there" over in the continuation of said advance movement, and a manually-shif table device associated With said margin-gage to move and hold said other raci: out of effective position to elim inate repetition of the line-space stroke.

17. The combination with a letter-feeding carriage returnable by power, of a line-spacing lever upon said carriage, a rack on said carriage ex tending in the direction of the run of the carriage and operatively connected to said lever, a pinion upon said carriage meshing with said rack, a nontraveling rack over which said pinion runs, in the final portion of the carriage-return movement, to operate the line-spacing lever, and means readily settable at will, whereby, for manual return of the carriage and concomitant linespacing by means of said lever, co-operation of said racks and pinion is silenced, said means also settable for restoring said co-operation.

18. The combination with a letter-feeding carriage returnable by power, and a reciprocatory line-spacing mechanism on said carriage, of a pinion on said carriage rotatable in one direction to impart a forward stroke to said mechanism and rotatable in the opposite direction to a normal position, by the spring-driven return stroke of said mechanism, a margin-gage limiting the carriage-return movement, and means connected to said margin-gage to be adjusted therewith for engaging and. thereby driving said pinion repeatedly, said margin-gage means including a plurality of racks, spaced apart endwise, said pinion engaging the racks successively in the return run of the carriage for repeated linespace operations and being therefore in said normal position while passing from one rack to another, means being provided whereby, with the pinion so restored, its advance with the carriage in letter-feed direction will not be im peded by any rack which the restored pinion passes in said advance.

19. In a typewriting machineythe combination with a carriage, and a reciprocatory line-- spacer thereon, of a pinion on the carriage rotatable in one direction to operate said linespacer, and reversely rotatable by self-restora tion of the line-spacer, a plurality of racks in the path of the pinion to rotate the latter repeatedly, at spaced stages in the carriage-return run, to multiply the work-sheet movement, and means to automatically disable line-spacerdriving co-operation of a rack and said pinion as said pinion passes said rack in the advance movement of the carriage following said return run.

20. In typewriting machine, the combination with a letter-feeding carriage returnable by power, of a line-spacing mechanism, and means brought into action by the return movement of said carriage at successive stages in its travel, to operate the line-spacing mechanism repeatedly, to multiply the movement of the worksheet.

21. In a typewriting machine, the combination with a letter-feeding carriage, returnable by 7 power, carrying a .rnernber operable for linespacing, of a plurality of line-space controllers arranged in the path of said member to engage and repeatedly operate the latterat successive stages in the carriage-return movement to thereby multiply the line-space movement of the work sheet, said member passing said controllers again in subsequent letter-feeding advance of the carriage, means being provided whereby, in said repassing of the controllers by said member, re-

peated operation of said member is avoided.

FRED BECKER.

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