US1619375A - Typewriting machine - Google Patents

Description

E. G. ROWLEY TYPEWRITING MACHINE I March 1, 1927. 1,619,375

Filed Oct. 19, 1923 2 Shoots-Shoot 1 a Aid.

] Aim/M9 1,619,375 5. GLROWLEY TYPEWRiTING mourns Filed 0 ct.l9. 1923 2 Shoots-Sheet 2 March 1 Patented Mar. 1, 1927.

UNITE sra'rss PTENT FFICEQ EDWARD G. ROWLEY, OF BELLEVILLE, NEW JERSEY, ASSIGNOR TO UNDER-WOOD TYPEWRITER COMPANY, OF NEW YORK, N. 55., A CORPORATIGN DELAWARE.

TYPEWRITING MACHINE.

' Application 'filed October 19, 1923. Serial No. 669,447;

The invention relates to ribbon-vibrating mechanism, and is applied to a typewriting machine in which the platen is on a frame shiftable' between case-positions, and in which the ribbon-vibrator is carried by the shiftframe and has a variable throw for presenting .a selected color-zone of a. bichrome ribbon to the printing-point, and in which the ribbon-vibrator may be silenced when it is desired, as for stenoiling.

In machines of this character, since the ribhon-vibrator is generally operable by all of the type-keys, it is convenient to actuate the ribbon-vibrator through, and by means of, the universal bar which controls the step-bystep letter-feed of the platen-carriage upon operation of any type-key. It follows that certain of the mechanism for operating the ribbon-vibrator may be on the main frame of the machine, whereas the ribbon-vibrator itself and certain actuating means therefor may be on the shift-frame.

An object of the present invention is the provision of novel and simple means whereby to connect the vibratonparts on the main frame with the vibrator-parts on the shiftframe. so that there will be no interference with the movement of the shift-frame, and so that the movementof the vibrator, in either case-position of the shift-frame, may be the correct movement truly to present any selected color-zone of the ribbon to the printing-point, without so-called bleeding of the ribbon, that is to say, without possibility of the type overlapping the boundary zones of the ribbon in its impact against the platen.

The ribbon-vibrator is ordinarily actuated by means of a lever connected thereto; and it has been proposed to actuate this lever by means of an arm or toggle movable in the same plane as that in which the ribbon-vibrator-lever moves, or in a plane substantially parellel thereto. Heretofore, also, the variation in the throw of the ribbon-vibrator has been obtained by shifting the fulcrum of the ribbon-vibrator-lever along a slot in the latter.- In such a construction. the arm or toggle, in addition to actuating the vibratordever, tends to effect translatory movement of the same as a whole. If the connections of the lever to the ribbon-vibrator, and of the arm or toggle to the vibratorconnecsult, which will besufficient to misplace the fulcrum-pin in the slot in the lever, and thereby effect overthrow of the ribbon-vibrator, resulting in the objectionable bleeding aforesaid.

A further feature of the invention is a novel fulcrum-device. which, while permitting of variation in the throw of the ribbonvibrator, involves no slot for movement of the fulcrum-pin along the lever, but provides for positive engagement of a fulcrumpin with the lever in each setting of the fulcrum.

- In the preferred embodiment of the invention, separate fulcrum-pins control the different throws of the ribbon-vibrator, and each fulcrum-pin, when in effective position, engages its own hole in the ribbon-vibratorlever. Instead, therefore, of a slot along which a single fulcrum-pin may be moved, each fulcrum-pin may be setso snugly into its own hole as to prevent translatory shift or displacement of the vibrator-lever by the toggle or other device which operates the latter. In a structure in which the several foregoing features are combined, there is, therefore, in the first place no tendency on the part of the arm or toggle to displace the ribb0n-vibrat0r-lsver with respect to its fulcrum; and, in the second place, each fulcrumpin, when in effective position, engages the ribbonvibrator-lever in'such manner as to prevent any displacement of the latter.

Preferably the fulcrum-pins are mounted on the opposite arms of a rocker, which, when swung in one direction, causes one fulcrum-pin to come into efiective engagement with the ribbon-vibrator-lever, and which, when swung in the other direction, causes the other fulcrunrpin to be brought to effective position. In this connection, it is a feature of the invention that the fulcrum-pinrocker, or other carrier may be set in a neutral position, in which neither fulcrum-pin may engage the ribbon-vibrator-lever; in which event, the ribbon-vibratorlever will not move the ribbon-vibrator when the typekeys are operated, and the ribbonwilmator will be silent, as for steneilin Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a view, in side elevation, partly crosssectional, of a typewriting machine embodying the present invention; the parts being in normal or idle position.

Figure 2 is a view, in side elevation, pa rtly cross-sectional, of the ribbon-vibrator and the connections thereof to the universal bar; the fulcrum-pin-plate and associated parts being shown, and the vibrator being shown as elevated by depression of a type'key for printing in the upper or blackzone of the ribbon.

Figure 3 is a view similar to Figure 2, ex cept that the vibrator is shown in position for printing in the lower or red zone of the ribbon.

Figure 4; is a top plan view, showing the fnlcrum-pin-plate set for printing in the lower or red-ribbon zone, and showing the lever for setting the pin-plate.

Figure 5 is a view similar to Figure 4, except that the pin-plate is set in neutral position, so that the ribbon-vibrator is rendcred silent, as for steneiling.

Figure 6 is a top plan view of the assembled mechanism, the fulerum-pin-plate being set for printing in the up )er or black zone of the ribbon, and the le t-hand part of the machine being broken away.

Figure 7 is a view, in front elevation, of the parts shown in Figure 6.

The machine herein illustrated is of the front-strike type, and comprises character keys 10, which throw type-bars 11 upward and rearward against the front of a platen 12, which is journaled in a sheet-metal carriage 13. The carriage travels to the left under the control of escapement mechanism,

not shown, and is provided with roller-bearings 14 and 15, by which it travels on sheetmetal tracks 16 and 17. The tracks 16 and 17 form partof a shift frame, which also includes a downwardly-extending rear member 18 and forwardly-extending side mem bers 19; the latter being provided with pivotscrews 20. by means of which the shift-frame is pivoted at either side to one of a pair of upper long links 21, these links being, in turn, pivoted to the main frame 22 by pivots 23 nearly behind but somewhat below the normal position of the pivots 20.

For guiding the shift-frame, there is provided a. pair of links or rock-arms 21, one at each side of the machine, and each provided with a stub-shaft 25, onwhich rests a yoke 26 formed in the corresponding side piece 19 of the shift-frame; the links 24 being fast at their rear ends to a transversely extending rock-shaft 27, which is encircled by a oil a sheet-metal rock-arm 35 fast on the spring, not shown, so tensioned as to assist in lifting the shift-frame to upper case.

For lifting the shifti'ra1r1e, there is provided, at one side of the keyboard, a shiftkcy 29, fulcrumed on a short shaft 30 on a standard 31 rising from a cross-tie 32, which connects the sides of the main frame. The shitt-key-levcr is provided with a rearward extension 33 underlying the elbowed end 3 1 shaft 27. It follows that, when the shiftkcy 29 is depressed, its rearward extension 33 hits the rock-arm 35, thereby rocking the arms 24 upward so that the stub-shaftsflo on the latter will lift the shitt-trame. The shift-key 29 may be depressed until the shift- "lirame is arrested by inwardly-turned heels 36 thereon, one on each side plate 19 thereof, and such heels strike set screws (not shown) on the turned-over ends of arms or backets (not shown) secured to a cross-piece 410 which connects the side plates of the main frame at the lower rear portion of the latter. When the shift-frame is shifted to this position, the types 41 on the type-bars 11 are effective to print, instead of the normally eitective lowercase types 42. Suitable means, not shown, is provided to arrest the shifttrame in normal lower-case position when it is allowed by gravity to return to such position upon release of the sl1ift-key.

The character-keys 10, when actuated, move character-key'levers 44 around a common fulcrum-plate 45, supported on the crosstie 40. Each key-lever 44, when actuated, moves against the tension of a spring 46 to swing a bell-crank, not shown, and, through the latter, to pull on a link, not shown, to cause its type-bar 11 to swing.

To cause the carriage to move from one letter-space position to another, while typing, there is provided a universal bar l7, supported by means of arms 48 on a rock sha'lt 19; with which universal bar the keylevers engage, when depressed, by means of shoulders or lugs 50 on the key-levers. The rock-shaft 49 is journaled in brackets 51, one at each end thereof, secured to the cross-bar 40. An arm, not shown, on the universal bar connects with and operates esoapementn'lechanism, not shown, for controlling the letter-feed movements of the carriage; so that, upon each depression of any letter or numeral key-lever, the carriage may have a letter-space advance under the action of the spring-drum. Escapement mechanism suitable for this purpose is shown in United States Letters Patent to Dobson, No. 1,417,- 304, dated May 23, 1922.

Except when the ribbon is to remain in 1% neutral position, as, tor instance. in stenciling, the ribbon is to ho vibrated upon each operation of a character-key, whether the platen is in lower or upper case-itihi'tt position; and, in accordance with the present in-- 13 ven-tion, a bichrome ribbon may be employed, in which event the ribbon may have a variable vibration to present one orthe other of the color-zones thereof to the printing point. The ribbon 59., con'iprising color- zones 53 and 54, and wound uponspools, not shown, is threaded through the eyes 55 of a ribbonvibrator, which comprises arms 56, connected at their lower ends to form a U-shaped structure 57. The ribbon-vibrator has upand-down movement on a guide 58, secured by screws 59 to a rail 60, which is unitary with the front carriage-guide-rail 16 of the shift-frame, and which depends vertically from the forward edge of the latter, and eX- tends lengthwise of the shift-frame, being secured at each end at 61 to brackets 62 on the side plates 19 of the shift-frame. The ribbon-vibratonguide comprises a pair of upright arms 63, which are embraced by ears 64 turned around the same, one from each of the arms 56'of the ribbon-vibrator. The base-piece of the ribbon-vibrator-guide is slotted at 65 toprovide a' guideway for a stud 66, by means of which the ribbon-vibrator is connected to one end of a lever 67 The lever 67 extends rightward, lengthwise of the platen, and near its right-hand end is supported by resting within a slot 68 in a forwardly-projecting ear 69 of a bracket 70, secured by screws 71 to the front face of the rail 60. The bracket has alsoa forwardl extending, horizontally-disposed ear 7 2, to which is pivoted at 7 3 a'horizontally-disposed plate 74, being forked to have arms 75 and 7 6. The arms 75 and 7 6 terminate in upturned cars 77 and 78, carrying horizontally-disposed pins 79 and 80, respectively.

hen the lever 67 rests, as aforesaid, in the bottom of the slot 68, and the fulcrum-pinplate 74 is in Figure 6 position, the fulcrumpin 80 registers with and protrudes through a pin-hole 81 in the lever 67; the pin 80 then serving as the fulcrum of the lever 67. hen, however, the fulcrum-pin-plate 74 is in Figure 4 positiomthe fulcrum-pin 7 9 registers with and protrudes through a pinhole 82 in the lever 67. At this time the pin 80 is clear of the lever 67, and the pin 79 serves as the fulcrum of that lever.

As will presently appear, the lever 67, when fulcrumed on the pin 81, has a throw with the ribbon-vibrator sufficient to present the upper or black ribbon color zone to the printing point; and, when fulcrumed on the pin 79, has a greater throw sufficient to present the lower or red color zone of the ribbon at the printing point. The fulcrum-pinplate may, however, be set in an intermediate position, as shown in Figure 5, in which position neither of the pins 7 9, 80 can serve as a fulcrum therefor, because both pins are out of contact with the lever. In order that either pin 7 9, 80 may readily find its way into its respective pin-hole in the lever 67, the

ends of the pins 79, 80, as shown in the drawings, are tapered.

The pin-plate is set by means of a lever having two arms 83 and 84, pivoted at 85 on a bracket 86, secured by screws 87 to the lower front cross-tie 32 of the main frame, and rising from the latter to approximately the plane of the fulcrum-plate 74. The lever 83- 84 engages the fulcrum-pin-plate 74 by means of a pin '88 in the rear end of the arm 83 set into a slot 89 in the fulcrumpin-plate. The slot 89 is of suiiicient length to permit of the angular play of the parts. The forward end of the arm 84 of the lever carries a finger-piece 84", which projects through a horizontalslot 90 in the front wall 91 of the main frame, so as to be accessible to the operator. A flange or plate 92 on the frame may be marked as indicated at 93, 94 and 95, to show the proper black, red and neutral or silent positions, respectively, for the finger-piece 84 It has been noted that the fulcrum-pin- I plate 74 is carried by the shift-frame, whereas the lever 83-84 is on a bracket on the main frame. In order that the connections of the lever 8384 with the fulcrum-pinplate may be maintained in all case-positions of the shift-frame, the pin 88 (see Figure 1) is shown as of suflicient length to maintain its connection with the fulcrum-pin-plate, whether the shift-framebe in its lowermost or uppermost position.

The lever 67 is actuated by the following means whenever a type-key is operated. On a forwardly-projecting ear 96 on a depending arm 97, forming part of the bracket 70, there is pivoted at 98 one end of a toggle 99 and 100. The other end of the toggle is pivotally connected to a pin 101 on a tongue 102, formed on the lower edge of the lever 67 and extending parallel thereto; the point of pivotal connection of the toggle to the lever 67 being between the fulcrum-pin-plate and the ribbon-vibrator. The arm 99 of the toggle is connected by a link 103 to an arm 104, fast on the rock-shaft 49, on which the universal bar is mounted. A leaf-spring 105, which, by bearing upon one of the universal bar-arms 48, holds the latter up in normal position and returns the latter to normal position when free to do so, acts through the shaft 49, arm 104 and link 103, to hold the toggle in its collapsed or folded, Figure 1, normal, position.

In operation, when any type-key is depressed, and depresses the universal bar, the arm 104 on the rock-shaft 49 is rocked forward, and pushes forward the link 103 to straighten out the toggle, as shown in Figures 2 and 3, thus causing the same to rock the lever 67 around whichever fulcrum-pin 7980 may be in engagement therewith; or, when neither fulcrum-pin is in engagement with the lever 67, to cause the righthand end of the lever to rock idly upward, without movement of: the ribl')on-vibrator.

It will be noted that the vibratory lever (57 swin s uponclosc fitting pivots; that the stud cc may have a close fitting sliding movement within the slot to accurately guide the vibrator and provide for a .few thousandths looseness for the end of the lever pivoted thereto at the opposite side of the vibrator, to prevent any stress being transferred to either pivot 79 or that the lever 67 supported within a guiding slot (58 on the shift frame to maintain the lever in parallel relation with the vibrator and with the platen; that the toggle swinging under and crosswise to the plane of the vibratorlever provides for a compact structure, a straight-line transmission and reduces the number of operative parts between the universal bar and vibratory lever; that the guiding slot 68 for the lever 67 is positioned between the toggle and the two fulcrums at the free end of the lever, to resist any sidewise stress from the movement of the transverse toggle, tending to push the lever out of aligmnent, to maintain engagement between each pivot 79 or SO and a fulcrum on the lever, and normally maintain registry between each fulcrum and a shifting pivot; that the rocker or plate '74-. and associated pivots 79 and 80 are fulcrumed upon the shift frame to swing at right angles to the plane of the lever 67 that the manuallyoperated shift lever 83-84: is fulcrumed upon the machineframe to swing in the same plane as the rocker 74, and has a loose connection with the rocker to provide for a case-shift movement of the latter and maintain a uniform transmission from the lever at either shift position; and that the transmission from the universal bar to the toggle straightcns out the toggle between a fixed pivot on the shift frame directly under a pivot on the vibratory lever, to vibrate the lever in practically a straight line and also prevent overthrow of the latter at the end of the ribbon-vibrating movement.

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. In a tvpewriting machine. the combination of a platen and a shift frame therefor shiftable to different case-positions. a vibratory ribbon-carrier on the shiftable frame, means wholly mounted upon the shiftable frame to predetermine the throw of the ribbon-carrier, including a ribbon-vibrator lever connected thereto and a rocker having spaced-off pivot-pins operable to engage with the vibrator-lever at different positions of its length, and keyactuated means to vibrate the lever. a p

2. In a typewriting machine lllClllCllIlg a frame, the combination of a platen and a shift frame therefor shiftable to different (ft1SC-I)0Sltl0l1$, a vib 'atory ribbon-carrier on the shiflable frame, means wholly mounted upon the shiftable frame to predetermine the throw of the riblmn-carricr, including a ribbmi-vibrator lever connected thereto, and a rocker having spaced-off pivot-pins operable to engage with the vibrator-lever at different positions of its length, and a manual control lever on the machineframe to rock the rocker for a predetermined throw of the ribbon-carrier.

3. In a typcwriting machine, a platen, a ribbon-vil5 rator, a lever for operating the ribbon-vibrator, a pair of fulcrums effective on the lever at different distances from the vibrator, a rocker on which the fulcrums are oppositely disposed, means for actuating the rocker to render one or the other of the fulcrums effective, according to which colorzone of a vbichrome ribbon is selected for presentation to the printing-point, typekcvs, and means for actuating the lever from the t vpedievs.

-:l. In a typewriting machine including a frame, the combination of a platen and a shift frame therefor shiftable to different case-positions, a vibratory ribbon-carrier on the shiftable frame, means wholly mounted upon the shiftable frame to predetermine the throw of the ribbon-carrier, including a ril1ilmn-vih1ntor lever connected thereto and a rocker having spacedoff pivot-pins operable to engage with the vibrator at different positions of its length, and a manual control lever on the machinc-frame to rock the rocker for the same predetermined throw at either shift position of the shift frame.

5. In a tvpewriting machine, a platen, a riblion-vibrator. a lever for operating the riblion-vibrator. a pair of fulcrumpins ene'ageable with the lever at different distances from the vibrator, a rocker having oppositely-directed arms, on each of which arms one of the fulcrum pins is mounted, means for actuating the rocker to bring one or the other of the fulcrum-pins to effective position on the lever, according to which colorzone of a. bichrome ribbon is selected for presentation to the printing-point, type-keys, and means for actuating the lever from the type-keys.

6. In a tvpewriting machine. a platen. a riblmn-vibrator, a lever for operating the ribbon-vibrator. a pair of fulcrum-pins engageable with the lever at different distances from the vibrator, a rocker having oppositel v-directed arms. on each of which arms one of the fulcrum-pins is mounted, means fo' actuating the rocker to cause one or the other of the fulcrum'pins to enter one of two holes in the lever, according to which color-zone of a bichrome ribbon is selected for presentation to the printingpoint, typekeys, and means for actuating the lever from the type-keys.

7. In a typewriting machine, a platen, a ribbon-vibrator, a lever for operating the ribbon-vibrator, a pair of fulcrums effective on the lever at different distances from the vibrator, a rocker on which the fulcrums are oppositely disposed, means for actuating the rocker to render one or the other of the fulcrums effective, according to which colorzone of a bichrome ribbon is selected for presentation to the printing-point, typekeys, and means for actuating the leverfrom the type-keys, the rocker being movable in a substantially horizontal plane, and the lever being movable in a substantially vertical plane. Y

8. In a typewriting machine, a platen, a ribbon-vibrator, a lever for operating the ribbon-vibrator, a pair of fulcrum-pins engageable with the lever at diflerent distances from the vibrator, a rocker having oppositely-directed arms, on each of which arms one of the fulcrum-pins is mounted, means for actuating the rocker to cause one or the other of the fulcrum-pins to enter one of two holes in the lever, according to which'color-zone of a bichrome ribbon is select-ed for presentation to the printing-point, type-keys,jand

means for actuating the lever from the typekeys, the pins being tapered so as readily to seat themselves in the holes in the lever.

' 9. In a typewriting machine, a plat-en, a ribbon-vibrator, a lever for operating the ribbon-vibrator, a pair. of fulcrums effective on the lever at different distances from the vibrator, a rocker {on which the fulcrums are oppositely disposed,-means for actuating the rocker'to render one or the other of the fulcrums effective, according to which colorzone of a bichrome ribbon is selected for presentation to the; printing-point, typekeys, and means for actuating the lever from the type keys, the rocker having a neutral position in which neither of the fulcrums is 10. In a typewriting machine, a platen, a ribbon-vibrat0r, a lever for, operating the ribbon vibrator, a pair of fulcrum-pins engageable with the lever at difierent distances from the vibrator, a rocker having oppositely-directed arms, on each of which arms one of the fulcrum-pins is mounted, means for actuating the rocker to bring one or the other of the fulcrum-pins to effective posi tion on the lever, according to which colorzone of a bichrome ribbon is selected for presentation to the printing-point, type-keys, and means for actuating the lever from the type-keys, the rocker having a neutral posi- ,tion in which neither ofthe fulcrum-pins is in engagement with the lever.

11 Ina typewriting machine, the com bination of a shift frame therefor shiftable to different case-positions, a vibratoryfribdifferent positions of its length or operable to be disengageable from said vibrator-lever I to silence the ribbon-carrier.

1 12. In a typewriting machine, a platen, a shift frame for the platen, means for shifting the shift frame between case-positions, a ribbon-vibrator on the shift frame, a lever connected to the ribbon-vibrator for operating the latter, a pair of fulcrums efiective on the lever at different distances from the vibrator, a rocker on the case-shift frameon which the fulcrums are oppositely disposed, means on the main frame of the machine for actuating the rocker to render, in either case-i position of the shift frame, one or the other of the fulcrums effective, according to which color-zone of a bichrome ribbon is selected for presentation to the printing-point, typekeys, and means for actuating the lever from the typekeys.

13. In a typewriting machine, a platen, a shift frame for the platen, means for shifting the shift frame between case-positions, a ribbon-vibrator on the shift frame, a lever connected to the ribbon-vibrator for operating the latter, a pair of fulcrums effective on the lever at different distances from the vibrator, a carrier on the case-shift frame for the fulcrums, a second lever on the main frame'of the machine for actuating the ,car-' rier to render, in either case-position of the shift frame, one or the other of the fulcrums eflective, according to which color-zone of a bichrome ribbon is selected for presentation to the printing-point, type-keys, and means for actuating the ribbon-vibrator-lever from the type-keys; the second lever having a pinand-hole connection With the fulcrum-carrier, and thepin being of such length as to maintain engagement of the second lever with the fulcrum-carrier in all case-positions of the shift frame.

14:- In a typewriting machine, a platen, a ribbon-vibrator, a lever vibrating in a plane parallel to the front face of the platen and connected with the ribbon-vibrator for operating the same, a toggle, connected to the ribbon-vibrator-lever and operating in a plane substantially at right angles to the plane of movement of the ribbon-vibratorlever, type-keys, a universal bar operable by the type-keys, a rock-shaft on which the universal bar is mounted, an arm fast to the rock-shaft, and a link extending forward from the arm on the rock-shaft to the toggle for actuating the latter.

15, In a typewriting machine, a platen, a ribbon-vibrator movable in a substantially vertical plane, a lever, connected at one end to the ribbon-vibrator and extending lengthwise of the platen, and adapted to be oscillated in a substantially vertical plane, a toggle connected to the ribbon-vibratorlever and actuable in a plane at right angles to the plane of movement of the ribbonvibrator-lever, type-keys, a universal bar operable by the type-keys, a rock-shaft on which the univen al bar is mounted, an arm on the rock-shaft, and a frJr\vardly-extendinglinkconnecting the arm on the rockshaft to the toggle, whereby to actuate the toggle when a typed ey depressed.

16. In a typewriting machine, a platen, a ribbon-vibrator, a lever connected at one end to the ribbon'vibrator, a pair of pin-andhole fulcruins for the lever at different distances from the ribbon-vibrator, means for rendering one or the other of the pin-andhole fulcrnn'is effective by a movement of the fulcrum at right angles to the plane of movement of the ribbon-vihrator-levcr, a toggle Connected to the ribhon-vibrator-lever, and movable in a plane at right angles to the plane of movement of the ribbon-vibratorlever, type-keys, and means for actuating the toggle from the type-keys.

17. In a typewriting machine, a platen, a ribbon-vibrator, a lever connected to the ribbon-vibrator, a rocker having oppositelydisposed arms, a fulcrum-pin on each of said arms, means for actuating the rocker to cause one or theother of the pins to move substantially perpendicularly to the ribbonvihratordever, into a hole in the lever, a toggle connected to the ribbon-vibratorlever, and movable in a plane substantially at right angles to the plane of movement of the ribbon-vibrator-lever, type-keys, and means for actuating the toggle from the type-keys. a p

18. In a typewriting machine, a platen, a shift frame for the platen, means for shifting the shift frame between case-positions, a ribbon-viln'ator on the shift frame, a lever connected to the ribbon-viln'ator for operating the same; the lever having a pair of fulcrum-holes therein spaced at different distances from the ribbon-vibrator, a rocker on the shift frame having oppositely-dis posed arms, on each of which is a pin for entry into one of the holes in the ribbonvibrator-lever, a toggle on the shift frame, connected to the ribbon-vihrator-lever for actuating the latter, type-keys, and means for actuating the toggle from the type-keys.

19. In a typewriting machine, a platen, a shift frame for the platen, means for shifting the shift frame between case-positions, a rihbonvibrator on the shift frame, alever connected to the ribbon-vibrator for operating the same; the lever having a pair of fulcrum-holes therein spaced at different distances from the ribbon-vibrator, a rocker on the shift frame havingoppositely-disposed arms,on each of which a pin for entry into one of the holes in the ribbon-vibratorlcver, a toggle on the shift frame, connected to the ribbon-vihratonlever for actuating the latter, type-keys, a universal bar actuable by the type-keys, a rock-shaft on the main frame on winch the universal bar is mounted, an arm fast on the rock-shaft, and a link connecting the arm on the rockshaft to the toggle, whereby to actuate the latter when a type key is operated.

520. In a typewriting machine including a platen, a shift frame therefor shiftable to different case-positions, a ribbon-carrying vibrator onthe shift frame, a vibrator-lever horizontally disposed along the front of the shift frame with the inner end. pivoted to the vibrator, a pair of pivot-holes at the outer end of the lever at different distances from the vibrator, a pair of pivots fulcrumed on the shift frame to be rocked into co-operation with the pivot-holes on the lever, a guide on the shift frame to normally maintain said leverhorizontally disposed and promote the entrance of the pivots within the holes of the lever, and keyactuated means to vibrate the lever.

21. In a typewriting machine including a platen, a shift frame therefor shiftable to different case-positions, a ribbon-carrying vibrator on the shift frame, a Vibrator-lever horizontally dis osed alongthe front of the shift frame wit1 the inner end pivoted to the vibrator, a pair of pivotlioles at the outer end of the lever at different distances from the vibrator, a pair ofspaced-ofi' pivots fulcrumed on the shift frame to be rocked into co-operation with the pivotlioles on the lever, a guide on the shift frame including a slot, within which the lever is adjusted for an up-and-down sliding movement, a toggle connected to the lever adjacent the guide to vibrate the lever Without overthrow, and key-actuated means to vibrate the lever.

22. In a typewriting machine including a platen, a shift frame therefor shiftable to different case-positions, a ribbon-carrying vibrator on the shift frame, a lever horizontally disposed along the front of the shift frame with the inner end pivoted to the vibrator, a pair of pivot-holes at the outer end of the lever at different distances from the vibrator, a pair of pivots ful crumed on the platen-frame to be rocked into co-operation with the pivot-holes on the lever, a guide including a bracket secured to the shift frame and formed with an arm having a slot to guide and support the lever and promote registry between the pivotholes and the pivots, a toggle movable with the shift frame and connected to the lever adjacent the osition of the guide to vibrate ated means to vibrate the level,

the lever wit IOUtOVBItlllOW, and key-actu- 23. In a typewriting machine including a platen, a shift frame therefor shiftable to different case-positions, a ribbon-carrying vibrator on the shift frame, a horizontallydisposed lever pivoted at one end to the vibrator for operating the same, a guide on the shift frame to suspend and maintain the outer end of the lever in parallel relation to the platen, pivot-holes at the outer end of the lever spaced different distances from the vibrator, a rocker pivoted on the shift frame, pivots arranged on the rocker to Co operate with the pivot-holes of said lever to throw the vibrator variable distances, a shift-lever fulcrumed upon the machinetrame having one arm thereof extending forwardly to the position adjacent the keyboard and the other arm extending rearwardly to the rocker, and means for loosely connecting the rear arm of the lever to the rocker to permit of an independent movement of the rocker at a case-shift operation a without changing the leverage transmitted from said shift-lever to the rocker.

24. In a typewriting machine including a platen, a shift frame therefor shiftable to different case-positions, a ribbon-carrying vibrator on the shift frame, a horizontallydisposed lever pivoted at one end to the vibrator for operating the same, a guide on the shift frame to'suspend and maintain the outer end of the lever in parallel relation to the platen, pivot-holes at the outer end of the lever and spaced different distances from the vibrator, a rocker pivoted on the shift frame, pivots arranged on the rocker to co-operate with the pivot-holes of said lever to throw the vibrator variable distances, a shift-lever fulcrumed upon the machine-frame having one arm thereof 6X- tending forwardly to the position adjacent the keyboard and the other arm extending rearwardly to the rocker, and a loose pinand-slot connection between the lever and rocker to permit the rocker to rise and fall with the case-shift movement Without changing the leverage between the lever and the rocker.

EDWARD Gr. ROVVLEY.

Images