US1007994A - Type-writing machine. - Google Patents

Description

J. WALDHEIM. TYPE WRITING MACHINE.

APPLIOATIONIILED mus, 1911. Patented Nov. 7, 1911.

4 SHEETS-SHEET 1.

IS A TTEIRNEY J. WALDHEIM. TYPE WRITING MACHINE.

1,007,994. APPLICATION PILED MAY 9, 1911. Patented NOV 7,

4 SHEETS-SHEET 2.

\A/ITNESSE5= INVENTEIR:

Has A TTDRNEY J. WALDHEIM.

TYPE WRITING MACHINE.

1,007,994. APPLIOATION PIL-YD MAY 9, 1911. Patented NOV. 7,

4 SHEETS-SHEET 3.

d IIIIIJII' \A/ITNEEEEE: IVENTEIR= 15 ATTORNEY J. WALDHEIM. TYPE WRITING MACHINE.

APPLICATION FILED y 1,007,994. MN 1911 Patented N0v.7, 1911.

4 SHEETS-SHEET 4.

\l\/|TNE55E5= I INVENTEIR= 1-ll5 ATTEIR'NEY mm PLANOGIIM'H couumsnmc'rox. 1:.c.

UNITED STATES PATENT OFFICE.

JOHN WALDI-IEIM, OF NEWARK, NEW JERSEY, ASSIGNOR TO UNION TYPEWRITER COMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

To all whom it may concern:

Be it known that I, JOHN WALDHEIM, citizen of the United States, and resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and more particularly to billing mechanism. The billing mechanism is of a character employed more especially for condensed record work and is of that type in which a rotative platen receives a predetermined extentof backward and forward rotation.

One of the main objects of my invention is to provide comparatively simple and efficient billing mechanism applicable to various styles of typewriting machines employing rotative platens.

A. further object of my invention is to provide billing mechanism of the character specified in which the parts may be regulated to afford less or more than a full rotation of the platen before it is arrested, depending on the depth of the heading of the billing sheet.

A still further object of my invention is to provide means for changing at will the leverage of the billing mechanism and thereby determine the extent of rotation of the platen afiordecl under cont-r01 of the billing mechanism.

To the above and other ends which will hereinafter appear my invention consists of the features of construction, arrangements of parts and combinations of devices to be set forth in the following specification and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference numerals indicate corresponding parts in the different views, Figure 1 is a fragmentary side elevation partly in section and showing the upper portion of a typewriting machine embodying my invention. Fig. 2 is a detail side elevation of the billing mechanism and the platen with which it is cooperative. Fig. 3 is a like view of the same showing a different disposition of the parts from that represented in Fig. 2. Fig. 4 is a detail fragmentary front elevation of the billing mechanism and platen. Fig. 5 is a vertical sectional view of the Specification of Letters Patent.

Application filed May 9, 1911.

Patented Nov. 7, 191 1 Serial No. 625,995.

same on the line m-w of Fig. 1 and looking in the direction of the arrow at said line. Fig. 6 is an enlarged detail sectional view of a portion of the billing mechanism taken on the line y of Fig. 1 and looking in the direction of the arrow at said line. Fig. 7 is a diagrammatic side view of a modified form of billing mechanism and the platen with which it is cooperative. Fig. 8 is a like view of the same showing a different disposition of the parts than that represent-ed in Fig. 7.

In the present instance I have shown my invention embodied in a Remington No. 10 or 11 machine although it should be understood that the invention may be embodied in various styles of typewriting machines employing rotative platens.

The corner posts 1 of the frame support a top plate 2- having upwardly extending lugs 3 upon which are mounted fixed guide rails 4. The guide rails 4 are grooved on opposite sides to receive anti-friction balls or rollers 5, which are likewise received in oppositely grooved guide rails 6 of the carriage. The carriage is of the usual rectangular construction comprising the front and rear guide rails 6 which constitute the front and rear cross bars of the frame. The end bars 7 of the carriage are provided with depending lugs 8 to which are pivoted parallel links 9 likewise pivoted at 9 to the platen frame. A corresponding pair of parallel links (not shown) are arranged above the links 9 to support the platen frame 10 for case shifting movement on the carriage in the usual manner. The platen frame supports a platen shaft 11 for a rotat-ive platen 12. The right-hand. end of the platen is provided with a line spacing wheel 13 (see Fig. 3) with which the usual spring-pressed detent roller 14 cooperates. A line spacing pawl 15 (Fig. 1) cooperates with the line spacing wheel and is actuated by a finger piece 16. The features thus far described are of the usual construction embodied in the Nos. 10 and 11 Remington machines and further detail description thereof is deemed unnecessary.

The billing mechanism as a whole is supported on a bracket-plate 17 which is secured by screws 18 to the left-hand end plate of the platen frame 10. This bracket-plate includes an upwardly extending arm 17 on which a segmental. rack, or rack section, 19

is pivoted on a shouldered pivot screw 20 (see Fig. Referring more particularly to the construction shown in Figs. 1 to 6 inclusive it will be found that the rack 19 in the present instance contains thirty-one teeth although the number of the teeth and the extent of the rack may be larger or smaller. A short segmental rack section 21 is arranged beside and adapted to overlap 10 the rack 19 and is of the same radius as the rack 19; being pivoted to turn on the shouldered pivot screw 20. The rack section 21 is provided with three teeth, in the present instance, and is adapted to move rela- 5 tively to the rack section 19 in order to increase or decrease the length of the rack as a whole, comprising the two rack sections 19 and 21, for purposes which will hereinafter more clearly appear. A spring 22 is secured at one end to a pin 23 projecting from the rack section 21, whereas the opposite end of said spring is connected to a pin 24 which projects from the rack section 19. The pressure of this spring is exerted 25 to move the rack section 21 around its pivot so that the teeth thereon will move longitudinally of the racksection 19, to the position shown in Figs. 1 and 3, where the rack section 21 is limited in its movement by a stop pin 25 carried by the rack section 19.

With the two rack sections extended, and

disposed as shown in Fig. 3, the rack as a whole will contain thirty-four teeth, whereas when the rack section 21 is moved against the pressure of its spring 22 to the overlapping position, shown in Fig. 2, the two rack sections 19 and 21 will present thirty-one eflective teeth as will hereinafter more clearly appear. The rack as a whole is adapted to be thrown into and out of mesh with a gear wheel 26 which, as shown in Fig. 5, is adapted to be received on the hub 27 of the right-hand platen head 28 and to be secured thereto by a set screw 29. This gear 26 in the present instance contains thirty-three teeth which corresponds to the number of ratchet teeth on the line spacing wheel 13.

The forwardly extending arm of the bracket plate 17 receives a laterally projecting shouldered pivot screw 30 (see Fig. 4)

' which constitutes a pivot for a hub 31 of an actuating device, crank arm or lever, designated as a whole by the reference numeral 32. This lever is pivoted to swing fore and aft of the machine as indicated in Figs. 1,

2 and 3, and is providedwith a laterally projecting finger piece 33 by which it may be actuated. An actuating link or connecting member 34 is pivoted at one end on a shouldered pivot screw 35 to the segmental rack section 19, whereas the opposite end of this link is pivoted on a shouldered pivot screw 36 which passes through a segmental slot 37 in the actuating lever 32. From an inspection of Fig. 6 it will be seen that a washer 38 abuts the shoulder on the screw 36 and is held against the shoulder by a nut 39 threaded on the end of the screw 36. This shouldered pivot screw passes freely through an opening in an arm 40 which projects from an adjusting device 41 which is in the nature of a slide bent at its lower end 42 (Fig. 6) to pass around and engage the lower edge of the actuating lever 32. The upper end of the slide 41 is bent laterally as at 43 and terminates in a pointer 44. The body portion of the part 43 is slotted at 45 to receive a cup-like carrier 46 for a spring-pressed locking bolt 47. This bolt is connected to a finger piece 4-8, and an ex pansion spring 49 surrounds the bolt and bears at one end against a circumferential shoulder 50 thereon and at its opposite end on the bottom of the cup-like carrier 46. The stem of the bolt 47 passes freely through a central opening in the carrier 46 to the point where connection is established with the finger piece 48. The slot 45 extends longitudinally from right to left so as to afford an adjustment of the carrier 46 and its bolt 47 to the right or left to either one of the two positions. The actuating lever 32 is provided with an off-set segmental member 51 provided on its upper face with a scale or indices 52 with which the pointer 44 is adapted to cooperate. Opposite each of the index marks on the scale is a perforation 53 or 54. The perforations 53 are staggered relatively to the series of perforations 54, as indicated in Fig. 4 and the perforations of each series are arranged in a straight line. YVhen the carrier 46 is adjusted to the left-hand end of the slot 45, the bolt 47 is adapted to cooperate with any one of the openings 53, depending on the adjustment of the slide 41 along the segmental scale 52. When, however, the carrier 46 is moved to the right-hand end of the slot 45, then the locking bolt 47 is adapted to cooperate with any one of the series of perforations 54 depending on the position to which the slide is adjusted along the segmental scale. By these means the pivoted end of the link 34 which is connected to the actuating lever 32, is adapted to be varied at will with reference to the pivot or fulcrum of said lever and thus vary the leverage of the actuating lever 32 on the billing rack, to determine the extent of rotative movement to be transmitted to the platen by the actuating lever.

In the construction shown in Figs. 1 to 6 inclusive a range of adjustment, from fifteen to thirty-three line spaces, is indicated. In the Remington Nos. 10 and 11 machines it requires about fifteen line spaces to carry the leading edge of the paper from its point of introduction into the machine to the printing line so that less than this number of line spaces is never required for condensed record billing work. By this range of adjustment variations for different depths of bill heads may be provided up to a full revolution of the platen or for the full thirty-three teeth of the line spacing wheel. The shouldered pivot screw 30 likewise constitutes a support for a bracket 55 which, as indicated in Fig. 1, is provided with laterally projecting ears 56 tapped to receive screw-stops 57. One of these screwstops is arranged above and the other below the forwardly projecting arm of the bracket 17 and is cooperative therewith to prevent the bracket from turning on the shouldered pivot screw 30 and also to afford an adjustment of the bracket when the parts are first assembled. The bracket 55 likewise carries the laterally projecting stop pins 58 and 59. The rearward movement of the actuating lever is limited by the stop pin 59, as indicated in Fig. 1, whereas the forward movement of said lever is limited by the stop pin 58. A spring 60 is coiled about the hub 31 of the actuating lever 32 and is connected at one end to a pin 61 projecting laterally from said lever. The op posite end 62 of the spring is connected to the bracket 17. The force of this spring tends to move the actuating lever 32 rearwardly although the force of the spring is insufficient to overcome the resistance offered to the movement of the rack 19-21 when the latter is in engagement with the gear 26, but assures a propor positioning of the rack in its normal position when the rack is disengaged from the gear. The spring also prevents an accidental engagement of the rack with the pinion or gear when the parts are in normal position.

In the operation of the mechanism it may be assumed that the parts are in the normal positions, indicated in Fig. 1. A bill sheet, record sheet and interposed carbon sheet are then introduced into the machine, with the leading edges thereof together or with the requisite lead given to the bill sheet. The platen is then advanced step-by-step until the point on the bill sheet where the first line of writing is to appear reaches the printing line. The operator observes the number of line spaces required to move the bill sheet to the osition mentioned which, by way of example, may be assumed to be 23. The operator then adjusts the slide 11 until the pointer 44 carried thereby is in register with the index mark, indicating the twenty-third position on the scale. The operator may then proceed with the writing and when the first bill is completed a copy thereof will be produced on the record sheet through the interposed carbon. The operator may, after the last line of the bill is completed, move the actuating lever 32 forwardly from the position shown in Fig. 1

to that indicated in Fig. 3. The result of this movement is first to bring the rack section 21 into engagement with the teeth of the gear wheel 26. The pressure of the spring 22 is all that maintains the fixed relation between the two rack sections in the forward movement of the rack. It will follow therefore that the rack section 21 will be arrested by its engagement with the gear 26 until the positively actuated rack section 19 engages the gear wheel, as indicated in Fig. 2. The result of this relative movement between the rack sections is to flex the spring 22. As the rack section 19 continues its forward movement, under positive pressure exerted thereon from the actuatinglever, the pin 24 will engage the rack section 21 when the three teeth on the rack 21 are in register with and overlap the first three teeth on the rack 19 as indicated in Fig. 2. During the further forward movement of the rack section 19 the two rack sections will move together as one part until the teeth of the rack section 21 are freed from engagement with the gear 26. The pressure of the spring 22 will then become effective to force the rack section 21 out of the overlapping position to the position indicated in Fig. 3, where it is arrested by its cooperating stop 25. lVhen the actuating lever 32 completes its forward movement and is arrested by the stop 58 the requisite amount of backward movement will be transmitted to the platen to properly position it to receive a newly introduced bill sheet. That is to say, the platen will be rearwardly rotated a distance of twenty line spaces instead of twenty-three by reason of the fact that the rack section 21 was maintained in the overlapping position shown in Fig. 2 during the backward movement of the platen and until such time as the rack 21 passed beyond the gear 26. This shorter rearward movement of the platen of twenty, instead of twenty-three line spaces, is for the purpose of automatically controlling the platen so as to provide spaces between different loills recorded on the condensed record sheet; three line spaces being provided by this arrangement between the entries of successive bills on the record sheet. After the completed bill sheet has been removed, a new bill sheet is introduced into the machine and the lever 32 is moved rearwardly from the position shown in Fig. 3 to that indicated in Fig. 1; the lever being arrested in this movement by the stop 59. The movement of the rack 19-21 effected at this time will produce a twenty-three line space movement of the platen inasmuch as the rack section 21 is maintained in its extended position, where the teeth thereon form a continuation of the rack section 19. A greater extent of forward movement of the platen is therefore effected through the &

actuation of the billing devices than is effected during the rearward movement of the platen, to provide spacing between bills as has hereinbefore been pointed out. When the rearward movement of the lever 32, to the position shown in Fig. 1, has been completed the platen will have been turned to the proper position to bring the bill sheet in a position to receive the first line of writing. The billing rack is at this time disenaged from the gear wheel 26 and the operator is free to proceed with the Writing of the bill. When the bill is completed the lever 32 will again be moved forwardly and the operations previously described will be repeated. It will be observed that after the billing devices are once set for a bill having a given depth of heading, all that is required is to 'move the lever 32 forwardly after each bill is written, insert a new bill and move the lever rearwardly, when the operator may proceed with the writing. By shifting the finger piece and the indicator 44 to different positions along the scale e the operator may vary the point of connection of the actuating link 34 relatively to the fulcrum of the lever 32, thereby changmovemeut transmitted to the platen by the lever 32 and the parts controlled thereby.

It will be seen that I have provided a simple and efiicient billing mechanism, requiring no mental calculation on the part of the operator, so that the mind of the operator may be concentrated upon the work being produced on the machine.

In Figs. 7 and 8 I have represented the modified form of billing mechanism, the main difference in the construction being in the extent of adjustment afforded the actuating link with reference to the controlling lever, and the extent of rotative movement of the platen which may be afforded. In the present instance I have shown a construction and a range of adjustment which afford a rotative movement of the platen for about forty-nine line spaces, or about one and onehalf revolutions of the platen. In Figs. 7 and 8 I will apply the same reference numerals to the corresponding parts as are employed in the preceding figures with the addition thereto of the exponent a. In this modified form of construction the slide 41 is adjusted to a position where the longest range or throw of the rack is afiorded. Assuming that the parts are in the normal position shown in Fig. 7 and that a previously entered bill has been completed a forward movement of the lever 32 from the position shown in Fig. 7 to that indicated in Fig. 8 is effective to turn the platen throughout a substantial one and one-half revolution so as to bring the point b on the platen to some such position as that represented in Fig. 8 after having completed the ing head is forty-nine spaces.

'full revolution. When the parts have been afirst line of writing; that is, assuming that the extent of movement required by the bill- When the newly introduced bill has been positioned as described, the operator may proceed with the writing as in the previously described construction.

The construction, as will be understood, embodies automatically operating means for varying the length of the rack by shifting the rack section 21 in the manner described. Moreover, it will be understood that means are provided for causing the two rack sections to travel together as one part in the :movement of the rack as a whole in one direction, whereas a movement of one of the sectlons independently of the other is afforded during the movement of the rack as a whole in the opposite direction. ing the leverage so as to vary the extent of While I have shown certain embodiments of my invention it should be understood that various changes may be made therein withpredetermined extent of rotation of the platen, said billing mechanism including leverage changing means by which the predetermined extent of rotation of the platen effected by the billing mechanism may be determined.

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

1. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism including, leverage changing means that may be varied at will and by which the predetermined extent of rotation of the platen effected by the billing mechanism may be determined.

2. In a typewriting machine, the combination of a rotative platen line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a hand actuated device, and adjustable means for changing the leverage between said hand actuated device and platen and by which the predetermined extent of rotation of the platen effected by the billing mechanism may be determined.

3. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a hand actuated member having a given un'vari able extent of movement, intermediate operative connections between said hand actuated device and the platen and by which the motion of said hand actuated device is transmitted to the platen, and means for varying said intermediate connections to vary the extent of rotation transmitted to the platen by said hand actuated device.

4:. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a lever, intermediate operative connections between said lever and the platen, and means for varying said connections relatively to said lever to thereby vary the extent of rotation which may be transmitted to said platen under control of the billing mechanism.

In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for ettecting a predetermined extent of rotation of the platen, said billing mechanism comprising a lever, a link connected with said lever, means controlled by said link for rotating the platen, and means for varying the point of connection between said link and lever relatively to the fulcrum of the lever, to thereby vary the extent of movement that may be transmitted to the platen under control of the billing mechanism.

(3. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a hand actuated lever having a given unvariable extent of movement, a link connected with said lever, means controlled by said link for transmitting movement from said lever to the platen, and means for varying the point of connection between said link and lever relatively to the fulcrum of said lever to thereby vary the extent of movement transmitted to the platen from said lever.

7. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for etlecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack formed of two rack sections for rotating the platen, hand controlled means for actuating said rack, and means for changing the leverage of the hand con trolled means on the rack and thereby de termine the extent of rotation of the platen effected by said hand controlled means.

8. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for eiiecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, a hand actuated device, and leverage changing means between said hand actuated device and rack that may be varied at will to determine the extent 01": throw of the rack and the extent of rotation of the platen effected by said hand actuated device.

9. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for eliecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, a lever, a. link connected to said rackand lever, and means for varying the point of connection between said link and one of the said parts to which it is connected.

10. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, a hand actuated lever having an unvariable extent of movement, a link connected to said rack and lever, and means for varying the point of connection between said link and lever and relatively to the fulcrum of the lever and thereby vary the extent of rotative movement transmitted from the lever to the platen.

11. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a pinion connected to rotate with the platen, a pivoted segmental rack normally out of mesh with said pinion, a hand controlled device for swinging said seg mental rack into and out of mesh with said pinion and for turning the pinion, and adjustable means for varying at will the leverage between said hand controlled device and said segmental rack to thereby vary the throw of the rack and thus determine the extent of rotation transmitted to the platen from said hand controlled device.

12. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a pinion connected to rotate with the platen, a pivoted segmental rack normally out of mesh with said pinion, a hand controlled lever for actuating said rack and for turning the platen, a link connecting said segmental rack and lever, and means for varying the point of connection between said link and lever to vary the throw of the rack.

13. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism including adj ustable leverage changing means by which the predetermined extent of rotation of the platen effected by the billing mechanism may be determined, and indicating means cooperative with said leverage changing means to indicate the extent the platen will be turned under different conditions of adjustment of said leverage changing means.

14. In a typewriting machine, the combination of arotat-ive platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a hand actuated device, adjustable means for changing the leverage between said hand actuated device and platen and by which the predetermined extent of rotation of the platen efiected by the billing mechanism may be determined, and indicating means cooperative with said adjustable means to indicate difi'erent extents of movement of the platen efiected by the billing mechanism under different adjustments of said adjustable means.

15. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for eitr'ecting a predetermined extent of rotation of the platen, said billing mechanism comprising a hand actuated member having a given unvariable extent ofmovement, intermediate operative connections between said hand actuated device and the platen and by which the motion of said hand actuated device is transmitted to the platen, means for varying said intermediate connections to vary the extent of rotation transmitted to the platen by said hand actuated device, and indicating means cooperative with the vari able intermediate connection to indicate the extent of rotation of the platen effected under different variations of the variable connection.

16. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a lever, a link connected with said lever, means controlled by said link for rotating the platen, means for varying the point of connection between said link and lever relatively to the fulcrum of the lever, to thereby vary the extent of movement that may be transmitted to the platen under control of the billing mechanism, and indicating means associated with said link, to indicate the extents of rotation of the platen izfigicted under different adjustments of said 17. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for offecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, hand controlled means for actuating said rack, means for changing the leverage of the hand controlled means on the rack and thereby determine the extent of rotation of the platen effected by said hand controlled means, and indicating means associated with said leverage changing means, to indicate the different extents of rotation of the platen eliected under ditlerent variations of the leverage changing means.

18. In a typewriting machine, the combi' nation of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, a lever, a link connected to said rack and lever, means for varying the point of connection between said link and one of the said parts to which it is connected, and indicating means associated with the said means for varying the point of connection.

19. In a typewriting machine. the combination of a rotative platen; line spacing mechanism; and billing mechanism for oftecting a predetern'iined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen. a. hand actuated lever having an unvariable extent of movement, a link connecting said rack and lever, means for varying the point of connection between said link and lever and relatively to the'fulcrum of the lever and thereby vary the extent. of movement transmitted from the lever to the platen, and indicating means associated with said link to indicate the various extents of motion transmitted to the platen under different variations in the point of connection be tween said link and lever.

20. In a typewriting machine, the combi nation of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a pinion connected to rotate with the platen, a pivoted segmental rack normally outof mesh with said pinion, a hand controlled device for swinging said segmental rack into mesh with said pinion and for turning the pinion, adjustable means for varying at will the leverage between said hand controlled device and said segmental rack to thereby vary the throw of the rack and thus determine the extent of rotation transmitted to the platen from said hand controlled device, and indicating means associated with said adjustable means.

21. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a pinion connected to rotate with the platen, a pivoted segmental rack normally out of mesh with said pinion, a hand controlled lever :tor actuating said rack and for turning the platen, a link connecting said segmental rack and lever, means for varying the point of connection between said link and lever to vary the throw of the rack, and indicating means associated with said link to indicate different extents of throw oi said rack and different extents of rotation of the platen eiiected under ditl'erent variations in the point of connection between said link and lever.

22. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack for rotating the platen, automatically operating means for varying the length of the rack, hand controlled means for actuating said rack, and means for changing the leverage of the hand controlled means on the rack and thereby determine the extent of rotation of the platen effected by said hand controlled means.

23. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for ef- .t'ecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack formed of two sections for rotating the platen, automatically operating means for changing the relation of said rack sections relatively one to another, hand controlled means for actuating said rack, and means for changing the leverage of the hand controlled means 011 the rack and thereby determine the extent of rotation of the platen effected by said hand controlled means.

24. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack formed of two rack sections, means for causing the rack sections to travel together in one direction and for aliording a movement of one of the sections independently of the other in the opposite direction, hand controlled means for actuating said rack, and means for changing the leverage of the hand controlled means on the rack and thereby determine the extent of rotation of the platen effected by said hand controlled means.

25. In a typewriting machine, the combination of a rotative platen; line spacing mechanism; and billing mechanism for effecting a predetermined extent of rotation of the platen, said billing mechanism comprising a rack formed of two rack sections for rotating the platen, one of which rack sections is spring pressed and movable longitudinally of the other, a stop to limit the movement of said spring pressed section relatively to the other section, hand controlled means for actuating said rack, and means for changing the leverage of the hand cont-rolled means on the rack and thereby determine the extent of rotation of the platen effected by said hand controlled means.

Signed at the borough of Manhattan, city of New York, in the county of New York, and State of New York, this 8th day of May A. D. 1911.

JOHN VVALDHEIM.

Vitnesses M. F. HANNWEBER, CHAnLns E. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents, Washington, 1). G.

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