US1808096A - Typewriting machine - Google Patents

Description

June 2, 1931, H. A. AVERY TYPEWRITING MACHINE Filed April 20, 1928 6 Sheets-Sheet 'l INVENTOR em Allen Aver BY J J ATTORNEYS I June 2, 1931.

H. A. 'AVERY TYPEWRITING MACHINE Filed April 20. 192;;

6 Sheets-Sheet 2 INVENTOR fl w/411622 Arey BY I v.

ATTORNEYfi June 2, 1931. H. A. AVERY TYPEWRITING MACHINE Filed April 20, 1928 6 Sheets-Sheet 3 June 2, 1931. H. A. AVERY 7 1,303,096

TYPEWRITI'NG MACHINE Filed April 20. 1928 e Sheets-Sheet 4 //.7 y [3. a", w

I I I INVENTOR flenyAl/en/rey 6 a ja -a;

ATTORNEYS June 2, 1931. H. AVERY 1,808,096

TYPEWRITING MACHINE Filed April 20, 1928 6 sheets-sheet 5 /76//Z a1. /Z5 o I A92 U! z 1 INVENTOR fienyAl/en Arepv /75 ATTORNEYS JuneZ, 1931. H. A. AVERY I 1,808,096

TYPEWRIIING MACHINE Filed April 20. 1928 S SheetS-ShGQt 6 lNVENTOR ATTORNEYS Patented June 2, 1931 UNITED STATES PATENT oFFic HENRY ALLEN AVERY, OF eR-o'ro NEW YORK, ASSIGNOR m L c sm'rn'a conoNA TYPEWRITEBS INo., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK TYPEWRITING MACHINE Application filed April 20,

visible writing typewriting machine.

One feature of the invention is the provision of a compact ribbon guide vibrating mechanism consisting of few parts of light weight especially suitable for use in a small and relatively flat portable typewriting'maghine having atype-bar-actuated universal Another feature of the invention is the provision of a simple and eflicient ribbon vibrating mechanism settable to impart two different extents of throw to a bichrome ribbon and to render the mechanism ineffective to vibrate the ribbon. 1

Another feature of the invention is the provision of a simple and efficient mechanism for vibrating a ribbon guide for a bichrome ribbon shiftable with the platen of a typewriting machine having a case-shifting platen carriage. a

Another feature of the invention 'is the provision of effective means for preventing accidental overthrow of the ribbon, when using either zone of the ribbon, in connection with vibrating mechanism for imparting two different extents of throw to a bichrome ribbon.

Another feature of the invention is the provision of acompact and efficient type-baractuated mechanism for-vibrating a ribbon guide to cover the printing point with either zone of a bichrome ribbon, and the provision of such a mechanism for use with a machine having a case-shifting platen so constructed and arranged that the vibratory guide willshift bodily with the platen and have a uniform throw for each zone whether the platen be in upper or lower case position. Otherfeatures and advantages will appear from the following description.

Parts of the improvements maybe used without the others, and variations may be resorted to within the scope of the invention as defined by the claims.-

' In the accompanying drawings:

Fig. 1 is a longitudinal sectional "viewof.

1923. Serial No. 271,499.

themac-hine, many of the parts being omitted to show more clearly the case shift m echa nism, the bichrome shift and stencil adjustment mechanism for the ribbon vibrating means, and the mountings for certain parts of the ribbon mechanism;

Fig. 2 a detail sectional View showing the mounting of the rotary escapemerit devices and associated parts of the ribbon mechanism; Figs. 3, 4, 5 and 6 detail perspective'views of venous parts of the ribbon mechanism;

Fig. 7 a rear view. of the machine cocked up to a position in which the type bar segment is in avertical plane and the carriage bed in a horizontal plane, the rear part of the main frame being broken away'and the vi brator control means being set in stencil position;

Fig. 8 a fragmentary bottom view of the machine positioned as in Fig. 7; i

Fig. 9 a perspective view showing part of the case shift frame, and also showing those portionsof-the ribbon vibrating means'and its adjusting means which are mounted on the shift frame, together withthe elements connected directly therewith; Figs. 10, 11 and 12 detail side elevations of similar portions of the ribbon vibrating means showing the positions thereof at the end of the impression stroke of a type bar in each ofrthe three adjustments of: the bichrome shift and stencil'control means Fig. 13 a fragmentary view ofthe machine,: on an enlarged scale, looking from the left-hand side of the machine, parts of the machine being broken away to show the ribbon vibrating means in side elevation; Fig. 14 a fragmentary bottom plan view of the machine, on an enlarged scale, showing the ribbon vibrating means in normal position and set for covering the printing point with the upper zone of the ribbon, as in Fig. 13, the view being taken with the machine cocked as in'Figs. 7 and 8; I

Fig. 15 a front view of the ribbon vibrating means,'set for use ofthe upper zone of the. ribbon as in Figs. 13 and 14, the front arcuate, portion of the universal bar beingbroken away, and the view being taken with the machine cocked as in Figs. 7 and 8;

Fig. 16 a section on the line 1616 of Fig. 15, with parts of the escapement and fixed margin stop bracket broken away;

Fig. 17 a fragmentary view of the machine looking from the right, parts being broken away to show the ribbon vibrating means in side elevation, and the vibrating means being shownin normal-position, and adjusted for vibrating the upper zone of'the ribbon to the printing point; and

Fig. 18 a view similar to Fig. 17 showing the positions of the various parts at the end of the printing stroke of a type bar. 7 3 Theinventionhas been illustrated as embodiedinthe Corona Fo'ur"typewriting machine wh-ich'is constructed, eircept for the improved key-actuated ribbon-vibrating means and certain modifications of. other parts associated therewith and hereinafter pointed out, substantially as shown and described in-United States Letters'Patent No. 1,700,827,-N.o.. 1,700,828, No. "1,7 00,829 and No. 1,741,689.

.The mainframe of the machine comprises a front-wall 10,11 back wallll, side walls l2,iand attransverse partition wall 13 which islocated-rin the rear portion of the main frame with its lower edge above the level of :the lower edges of the other frame walls and inclines upward and rearward. A rearwardly. inclined type-bar segment 14, having an arcuate recess 15 in its rear face, is held tothe front face of wall 13 by suitable screws, with theusual arcuate pivot wire 16 therein lying in 'a plane parallel with said wall. Anarcuate system of type bars 17 are fulcrumed'on' wire 16 and guidedin the segment-slots to strike on the'upper front quarte'rofaa platen18. Character key levers 19 are fulcrumed at theirr'ear ends on a pivot wire: 20-held to a fulcrum plate 21 secured toEth'eare-ar face of wall 13by suitable fastening screws. 'The key levers extend down wardbehind wall 13 and then forward under said? wall= to the keyboard and are guided in a comb member 22heldto the main frame. The connectionbetweeneach key lever and its associatedtype bar comprises a bell-crank lever 23 fulcrumed in a -sub-lever segment 24 and connected with the type bar heel and, key

lever-.by links 25, and'26, respectively- Return springs. 167for the typebar actions connect key-levers19 with a spring anchor bar 16 6 on the-main ffra'me, hereinafter referred to. p

The shift frame for the platen carriage 27 comprises a rearwardly and downwardly in-.

clined carriage bed 28having "a pairjof rigid downwardly and forwardly extending sheet metalguide members. 29 fastened thereto at their upper ends adjacent opposite sides of the machine and connected by a'transverse brace-rod" 30 adjacent their lower ends.- The carriage is mounted on the bed in rearwardly tilted position on suitable antifriction bearings, as shown, to travel transversely of the machine, and supports platen 18 above and in rear of the type bar pivots. The carriage and bed overlie the space between frame walls 11 and 13 and the guide members 29 extend down between said walls between cooperating guide members 31 held to the main frame side walls in upwardly and rearwardly inclined position, members 29 and 31being provided withraces in which are confined ball bearings, said members and races being so 'arranged as to guide the carriage and shift frame obliquely in a plane parallel with the plane ofthe segment, as in said application and machine before referred to.

Asin the Corona Four machine, the shift frame is actuated by either of two shift key levers 33 fulcrumed on pivots 38 on brackets 39 held to frame walls 12, said levers having forked rearends embracing studs 34 on the for-ward ends of the side arms 35 of a shift torsion and counterbalancing frame which comprises said arms 35 and a rock shaft36 to whichthe arms are'held. ,Shaft 36 is journalled on the frame walls 12 between Wall 11 and the lower part ofthe shift frame, and studs 34 are engaged in rearwardly and downwardly extending slots37 in members 29 of theshift frame. Brackets 39 also support a type bar rest 40. V

Downward movement'of-the-shift frame is limited by engagement of'stops 41 on members 29 with adjustable stop screws 42 on brackets 43 heldrto frame walls 12. Upward movement of the shift frame is limited by the engagement of adjustable stop screws 44 on members 29 with stops 45 on brackets 43. The frame'3536 is arranged to counterbalance the shift frame by connecting lugs 46 on'arms 35 with the lower ends of counterbal ancing springs 47 which are secured at their upper ends to arms 48 of'brackets 43.

An arcuate sheet metal universal bar 49,

adapted to be engaged and moved rearward-s 1y by lugs 17 on the type bars during the latter part of the printing strokes-of the typ e'bars, is'located between segment 14 and wall 13 and is supported ina plane parallel withtheplanes of said wall.- and segment to vibrate in the segment recess 15in a path substantially perpendicular to said planes and the rearwardly inclined plane in which the type bar pivot wire 16 in the-segment lies. Universal bar 49 is. carried at the forward ends of apair of'rearwardly and downward fording clearance openings through Wall 13, and fulcrumplate21. Thefrontzportions of sections 50'e-an'd- 5,1 are'rigidly but detachably clamped to the rear portions of'sections and 51 by pairs of screws 54. I

Sections 50 and 51 of the side arms are offset laterally inward at the rearends of sections 50 and 51, and are provided with longitudinal guiding and supporting slots 53 in their ofiset rear portions extending perpendicular to the plane of the segment. These slots are open at their rear ends and correspond in width with the diameter of rock shaft 36 e which extends therethrough and upon which the side arms are thus slidably supported and guided at their rear ends to reciprocate fore-and-aft of the machine. A transverse spacer bar 55 formed integrally with section 50 forward of shaft 36 abuts the inner face of section 51 The side arms extend from universal bar 49 through the shift frame and the shift torsion frame to points adjacent the lower edge of wall 11, and are supported and guided intermediate the universal bar and shaft 36 on fore-and- aft rocking arms 56 and 57, fixed at their lower ends on a short transverse rock shaft 58. Shaft 58 has trunnions 58= journalled on the inner ends of bearing screws 59 threaded inward through the rear ends of a pair of arms 21 which are formed integrally with fulcrum member 21 and extend rearward and downward to a point forward of shift frame rod 30 and close to the baseline of the main frame. Arms 56 and 57 extend upward and rearwardly forward of shift frame rod 30 at a. slightly less angle from the vertical than the wall 13 and shift frame and have pivot holes in their ends in which are en gaged reduced pivot portions of pivot and spacing studs 61 and 64:, the reduced outer supporting ends of the studs being swaged tightly in apertures in the arm sections 50 and 51, respectively, forward of arm sections 50 and 51 Stud 6% has a reduced and headed extension 64 extending inward from its pivot portion for supporting and guiding a part i of the ribbon vibrating mechanism.

'lhe'universal bar is normallyheld at the forward limit of its movement against the front wall of recess 15 in the type bar segment 14 by a return spring, hereinafter described, and its extent of throw by universalbar contacting lugs 17 on the type bars 17 is such that the pivot studs 61 and 64 and up-' per ends of rock arms 56 and 57 swing b tween points substantially equal distances at opposite sides of a plane through the axis of rock shaft perpendicular to the plane of the carria e bed and parallel with wall 13. The arrangement and movement of rock arms 56 and 57, together with the arrangement of slots 53 longitudinally of the side arms and perpendicular to the plane of wall 13, provides for supporting and guiding the universal bar 49 to vibrateobliquely to the horizontal plane of the machine in a path substantially perpendicular to the plane of the segment and its type bar pivot wire.

The escapement and line-locking mechanism are constructed as in the Corona Four machine, with the exceptions hereinafter pointed out, and needonly be so far described as to permit a full understanding of the present invention. A sheet metal bracket 65 has its flat body partheld by screws 66 against the bottom face of carriage bed 28 and extending across an opening 85 in said bed. A steel bushing 6'? extends through, and is tightly swaged in, an opening in said body part of the bracket and is formed with a narrow cylindrical hub portion 67 abutting the said bracket at its upper end, said hub portion being of less diameter-than the lower end of the bushing to provide an annular seat 67 parallelwith said body part of the bracket for a line-lock member, hereinafter described, pivoted on said hub.

Bracket 65 is formed with rearwardly and downwardly extending side arms 68 and 69 carrying at their rear ends horizontal pivot screws 70 having reduced pivot ends engaged in bearing apertures in pendent pivot ears 72 and 73 formed at the ends of the flat body part of a sheet metal dog rocker 74. A rigid holding dog-75, formed on the forward edge of rocker 74, and a feeding dog 7 6 (pivoted on the rocker at 77 a11d controlled by a suitable spring and stop device), cooperate with a toothed escapement wheel 7 8 to control the feed of the carriage. Wheel 78 in the present construction is formed with a pendent hub usual way by a suitable cable with the car riage. Pinion 80 is adapted to'pass through opening in the bed 28,'so that bracket-65 together with theparts mounted thereon is removable from and attachable to the bed as a unitary assemblage.

In the present construction the escapement shaft is prolonged downward to a point above the level of the universal bar side arms and is formed with a circumferential groove 86 closely adjacent its lower end in which is engaged a bendable horseshoe shapedkey 87 between which and the lower end of the es-- capement wheel hub is confined the main body part of a lever forming part of the ribbon vibratingmeans, which lever as herein after described is pivotally supported on the a shaft 7 9 and the'hub '78 of'the'escapement wheel 78 e W The car riage 27' is normally urged towardthe leftby the usual spring drum 82 which is held to the carriage bed at 83and-is connected in the In the present construction also the prolonged portion of the shaft below the bushing is'formed with longitudinal grooves 88'int0 which are firmly screwed the inner end of set screws89, threaded through the hub of the esc'apcment wheel, for holding the wheel to the shaft. The outer ends of'screws 89 are countersunk Within the periphery of the hub 78 which is free from other projections and is cylindrical.

Dog rocker pivot ear 7 3 is formed with a forwardly extending stop arm 90 formed with an upstanding rearwardly facing hook lug 90 the upper end of which normally abuts the bottom face of bracket adjacent the inner side of bracket arm 69' to arrestreturn movement of dog rocker 7 1under the pull of the rocker return spring 91. Spring 91 is connected at its rear end with a lug 92 projecting laterally outward from the lower end of rocker pivot ear 7 2 and is connected at its forward end witha pendent lug 93 on bracket arm 68. The feedingdog 76 normally engages a tooth of the escapement Wheel 78. with holding dog above the plane of the wheel. The rocker is provided with an arm 94: depending from its pivot car 73 and formed with an outwardly extending contact lug 95 at, its lower end lying fiatwise in a plane perpendicular to wall 13 andithe path of movement of the shift frame. The rocker is adapted to be rocked through the medium of said arm 94 and lug 95, to disengage dog 76 and engage dog 75 with escapementwheel i 7 8,bytappets 96 and 97 movable, respectively,

with the type-bar-actuated universal bar 19. and a space bar (not shown), said tappets being located forward of lug 95 with their rear lug-contacting edges parallel with the path of shift of the shift frame.

Tappet 96 is rigid with and formed on the rear end of side arm 50 0f the universal bar and, in the machine shown, is normally spaced slightly forward of lug 75 Tappet 97 is formed on the rear end of a bar 98', and is normally substantially engaged by lug 95, as

shown. The'bar98 is guided to move rearward and downward upon depressions of the space bar, being provided with a downwardly inclined guide slot 99 in which engages a stud 100 projecting outward from rock arm 56, as in the machine hereinbefore referred to. I

A plate 101 formed of sheet metal is held to the carriage bed 28 by screws 102 and 103 passing through a forwardly extending base flange formed on said plate and underlying the bed. Plate 101 extends up behind the irear raceway of the carriage where it is V platen carriage and is adjustable along said bar as in the Corona machines. Stop: 10 1 is formedwith a pendent stop lug,1O 1 at its lower end adapted to engage and operate a line-locking member. The line-locking member comprises a sheet metal latch lever or pivofted plate 112' having its flat body part underlyingbracket 65 and heldflat against the bottom face of said bracket by the annular upwardly facing seat or shoulder 67 b on bushing 67, said plate having a slot 106 therein extending rearward from the forward edge of said plate and rounded at its rear end so that the rear end and rear portions of the side walls of the slot hug the periphery of the hub section 67 of the bushing. Slot 106 thus forms a pivotal bearing aperture in the plate adapted to receive hub 67 and open at one side so that the plate may be'slipped edgewis'e on and off; its pivot. V Plate 112 is formed with a rearwardly facing notch 107 in its rear end, downwardly into which projects the thickened head of the right hand fastening screw 103 for plate 101, said screw head being .o'flless diameter than the width of the notch 107 at the point where said screw head extends into the notch. The left hand wall of notch 107 forms a stop face normally held engaged with the head of screw 103 by coil spring 108, withthe stop face formed by the opposite wall of said notch spaced from said screw head; Spring 108 in the present construction is connected at its rear end with the outer end of an integ'ral arm 109 extending toward the right from the rear end of plate 112 to a point adjacent bracket arm 68, while the forward end of the spring is connected to an arm of the ribbon guide vibrating bell crank, hereinafter described, to yieldably hold both of the members in normal position. Spring 108 not only normally holds plate 112 rocked toward the right, but also exerts a constant forward pull on said plate to prevent accidental detachment of the plate from its pivot hub. Arm 109' is offset upward intermediate its ends in rear ofplate 101 and'formed with a stop lug 110 projecting rearward therefrom and having a straight rearwardly extending.

right hand edge normally in the; path of travel of stop lug 104 of margin stop 101. Plate 112 is formed with a latch arm 111 off:

set downward therefrom and normally ex rocked toward the left against the pull of,

spring 108 (until arrested by engagement of the right hand edge of notch 107 with the head of screw 103) through the engagement with lug 110 on member 112 of lug 104 of margin stop 104 as the carriage is .fed towardthe left. When this occurs, the dog rocker is positively locked in normal posi tion so that the carriage cannot be fed farther toward the left.- Since the dog rocker cannot tilt, ifacharacter key is depressed,

its connected type bar 17 will simply swing up to the position where the universal bar has moved slightly rearward and been arrested by tappet 96 striking lug 95 on the locked dog rocker. As the universal bar is thus arrested forward of its normal rearward limit of travel, it blocks the completion of the printing stroke of the type bar andplaten. [Type guide 114 is constructed and attached to wall 13 by screws as in the machine and applications before referred to, having a flat main body portion lying parallel with'the plane of the segment and provided with a type bar guiding throat 115 at its upper end and a longitudinal slot 116 extending upward from its lower edge. Ribbon guide 113 lies behind the type guide and consists of a flat sheet metal plate provided at its upper end with ribbon guiding slots and intermediate its ends with angular guide lugs 117 embracing the sides of the type guide,

all as in the machine referred to.

In the present construction, ribbon guide 113 is formed at its lower end with a central pendent tongue bent rearwardly at 118, and then bent successively forwardly, downwardly, and rearwardly to form a rearwardly and downwardly facing U-shaped socket 119.

The front wall of socket 119 lies immediately forward of the plane of the front face of the type guide and in the same inclined plane as the inwardly bent forward ends of lugs 117 and is formed with lateral guide lugs 120 lying in the plane of said front wall and overlapping the front face of the type at opposite sides of slot 116.

Socket portion 119 of the ribbon guide slidably works in slot 116 to assist lugs 117 to guide hold the ribbon guide against lateral tilting,

while lugs 117 and 120 on the one hand, and

the flat main body of the ribbon guide on the other hand, work against opposite faces of the inclined fiat body part of the type guide to maintain the ribbon guide in the plane of the segment during vibratory movement thereof.

A bichrome inked ribbon .121 is reeled on the ribbon spools 122 and threaded through guide slots in vibrator 113. The spools and their pawl and ratchet rotating devices are mounted on brackets 123 held to carriage bed 28 at opposite sides of the machine as in the Corona Four machine.

Ribbon vibrator 113 is reciprocated and is also supported to shift bodily in unison with the platen during case shifting, by a vibrator actuating bellcrank 124 pivotally' mounted in a bracket 126 detachably held to the bottom face of carriage bed 28 by screws 127. Bracket 126 takes the place of a similarly located bracket in the Corona machine and is formed at its front edge with a pair of upwardly and rearwardly inclined lugs 128 for supporting the line gauge and printing point indicator of the machine, but in the present construction the flat body part of the bracket is formed with a pair of integral pendent pivot lugs 125 for bellcrank 124 lying flatwise in fore-and-aft extending and trans versely spaced planes and provided with bearing apertures for the shouldered pivot portion of pivot screws 129, the reduced threaded ends of which are screwed into threaded holes in the upper parts of pendent arms 130 and 131 of bell crank 124.

The bellcrank 124 is formed of sheet metal and consists of a transverse bar-like body part which is formed at its ends with the integral pendent arms 130 and 131, and is formed intermediate its ends with a forwardly extending integral arm 132 extending toward the typeguide. Arm 132 has its front end bent to lie edgewisein a vertical plane and terminates in'an enlarged bearing head 133 the top and bottom edges of which are rounded. Head 133 is engaged in socket portion 119 of the ribbon guide, thereby af-' fording a separable rocking connection between the bell crank and the guide. Bellcrank arm 131 is bent horizontally outward below its pivot ear, and this outwardly bent arm portion is formed at its rear edge at its outer end with an integral pendent stop lug 134 lying flatwise in atransverse plane and normally held back against a fixed abutment on the shift frame, namely the front edge of the lug.93 on escapement bracket arm 68 to which the front'end of dog rocker return spring 91 is anchored. The bellcrank is yieldably held in this normal position, with the ribbon guide lowered to retract the ribbon from in front of the impact point on the platen, by the spring 108 hereinbefore referred to, the front end of this spring being anchored to the horizontal portion of bellcrank arm 131 and its rear end to the arm 109 of the pivoted line-locking member 112 before described. Stop lug 134 is bendable fore-and-aft of the machine to adjust the normal fore-and-aft position of pendent arm 130 of the bellcrank 124.

Bellcrank 1.24 is rock d in opposition to spring 108 by an actuating lever 135 to cause the ribbon to cover the printing point. This point.

lever is an upstandingand fore-and-aft rock able lever having a single arm, is axially shiftable to either of three different positions relatively to the pendent arm of the bell crank, and has a rocking movement of the same amplitude about its axis in each of said positions. termines the amplitude of throw of the bellcrank, which is nil in one setting for writing stencils, short in another setting for causing theupper (usually black) zone of the ribbon to cover the printing point, and longer in the third setting for causing the lower (usually red) zone ofthe ribbon to cover the printing Lever 135 isjstamped from sheet metal and has its main body portion provided at its upper end-with a stop arm-136 extendin transversely of the machine in rear of the hub 78 of the escapement wheel 7 8 andprovided at its lower end with a tailpiece 137 terminating in rear of brace rod of the carriage shift frame. The intermediate portion of the lever 135 is widened and of U-shape in plan View, affording a broad fiat contact wall 138 for an actuating tappet and a pair of forwardly extending walls 139 and 140'with the forward edgesof which are connected by in: tegral bendable tongues of metal, apair of foreand-aft bendable slotted ears 141 and 14:2 lying fiatwise in the planes of the walls 139 and 140 respectively and connected with said walls'by said tongues intermediate the upper and lower endsof the ears.

The intermediate body portion of the lever is formed with a pair of pendent transversely spaced guiding and pivot ears 143 and 144 below walls 139 and 140, respectively, lying in fofre-a nd-aft planes and provided with circular bearing holes 145 through which brace rod 30 passes loosely, affording a sliding and pivotal mounting for lever 135'at its lower end on the shift frame; Lever 135 is spring retracted, as hereinafter described, with stop arm 136 spaced rearward from hub 78, and is rocked forwardly by a two-armed tappet lever 146. Lever 146 is formed of sheet metal and has its flat body portion 146 fitted between the flat lower end of escaper'nent wheel hub 7 8 and the escapement shaft key standprovided with a bearing aperture 147 through which the escapement shaft 7 9 extends and also with an integral upwardly offsetbearing ring 148 encircling the upper end of hub 78 thus aiiordinga steady bearing'for the lever for rocking about said shaft hub in a plane perpendicular to the plane of movement of the case-shift frame. Ring 14-8 is connected with the body part'of lever 146 by a single web 149 located forward of hub 78 so that the double lever bearing does not obstruct movement of stop arm 136 on lever 135 into and out of engagement with said hub.

The body part of lever-146 is formed with a tappet-carrying arm 150 extending toward The axial setting of lever 135 dethe le f t hand side of the machine and formed with an integral pendent tappet 151 dis osed edge'wise ina fore-and-aft plane behin contact wall 138 of lever 135, said tappet pref- I to partake of the case shiftmovement of the shift frame. t p

Ribbon actuator 154 consists o-fa sheet metal bar disposed edgewise in a vertical plane and having the transverse slot 153 intermediate its ends, open at the top and extending parallel with the planeof shift of the shift frame, andalso'h-aving the longitudinal openended slots.155 and 156 atits front and rear ends, respectively, extending parallel- With the path of movement of the universal bar and perpendicular to the path of shift of the the shift frame. Actuator bar 154 is also formedwith an integral pendent-arm 157 ad-- jacent its frontend extending down between rod 30 andshaft 58. The slottedforward end 155 of ribbon actuator l'54'is-guided ands'upported in and by the circumferenftially grooved inner end 64? of pivot stud 64 car;- ried by universal bar side arm section;51,and the slotted rear end of the rearwardly and downwardly extending actuator'is guided and supported in a circumferentialg'roove 158 in the rock shaft 36 forming part of the shift torsion frame.

The slots and supports are so arranged that actuator bar 154 is movable 'endw-ise rearwardly and downwardly by the universal barthrough the medium of stud 64in' a path perpendicular to the path of shift of the shift frame. The described method of mounting and actuatingbar 154 permits'rearward movement of the-bareither by,-or independently of, the universal bar, and also affords a simple mounting and operating meansfor the actuating bar.-

In the machine shown, theribbon feeding and reversing devices'are'a-l'so actuated from bar 154, and the capacity for independent movement of 10211154 is utilized in connection with the typing of accent characters, by means not shown herein. The ribbon actuat'o'r 154C and universal bar 49ers returned to normal positiol'i by a return spring 159 connected with the actuator shaft 164 for the ribbon spool driving and ribbon- 'feed reversing devices of the ma'chine, said returnbeing assisted, except during stencil Writing, by the common return spring 108 for the vibrator actuating bellcrank 1-E24and line-locking lever 112. Theribbon feeding and-reversing devices and actuating shaft 164 therefor are constructed as in the machine line of the main frame.

= der wall 13, and the left hand rock arm 163 is extended downward below the shaft to provide a pendent rock arm 165 connected by the return spring 159 (above referred to) with a spring anchor bar 166 mounted in the main frame of the machine to which the type bar action return springs 167 are also connected. Arms 163 carry tappet hooks 168 at their upper ends for actuating the ribbon-abutment settable trip devices 169 to throw one pawl 161 out of action and the other pawl into action by the pawl-controlling means of Corona machine not herein shown the About midway its ends rock shaft 164 is provided with a pendentrock arm 170 for oscillating the shaft at the type strokes.

All the foregoing parts of the ribbon feeding and reversing means are constructed as in the Corona Four machine and the applications referred to above. In the present construction, pendent rock arm 170 is positively connected by a rigid fore-and-aft ex tending wire link 171 with the outwardly bent lower end of pendent arm 157 of the reciprocable ribbon actuator bar 154, said I link 171 extending underone of the reduced trunnion portions 58* of rock shaft 58 and lying substantially at the level of the base It will be obvious that spring 159 normally rocks shaft 164 in a direction to cause link 171 to draw actuator bar 154 forward, and that said bar, through engagement of the rear end of slot 155 with part 64 of stud 64 will push the universal bar forward until return moveiment of these parts under the influence of spring 159 is arrested by the front edge of the arcuate universal bar 49 abutting the front wall of the recess 15in type bar segment 14, which will serve as a stop to determine the normal positions of the parts of the ribbon mechanism. Since tappet lever 146.

is interlocked with actuator 154 its normal position is also fixed by this arrest of the universal bar. The normal return position of bellcrank actuating lever 135 is also deter adjustmentthereof, and in order to hold the lever back against the tappeta light spring I 172 is provided. In the construction shown,

spring 172 is connected at one end with an eye 173 punched rearward from tail piece 137 of lever 135 and extends upward and rearward therefrom to the transverse body part of dog rocker 74 to which its upper end is at tached by passing its upper hooked end about the web of metal between the rear edge of the rocker and one of the stop eyes 174 punched down from the rocker with which the pair of pivoted spring-connected feed-dog controllers of the Corona machine cooperate.

Spring 172 is preferably of light tension, only strong enough to hold up the lever 135 against the tappet and to return this lever, alone, during stencil writing, when the lever is disconnected from the bellcrank. Spring 172 is only very slightly stretched on the down strokes of the keys until tappet 96 picks up the dog rocker, after which the lever 135 and dog rocker 74 swing together in the same direction without appreciable tensioning of the spring during the remaining part of the down strokes of the keys. This arrangement, to gether withthe light normal tension of the spring provides in a simple way for the before described sustaining of lever 135 during axial shifting, and return thereof during stencil operations, without adding an appreciable load to the ribbon vibrating means during normal operation of the machine.

The pendent arm 130 of vibrator actuating bellcrank 124 has rigidly attached thereto, adjacent its lower end, two laterally projecting short pins or studs 175 and 17 6 located different distances from the pivotal axis of the bellcrank and at difi'erent sides of arm 130, said pins having reduced portions passed through holes in arm 130 and headed over against the arm. The U-sha-ped or yoke-like body part of lever 135 embraces the lower end of arm 130 of the bellcrank, and wall portions 139 and 140 of this part of lever 135, with their attached slotted ears 141 and 142, are spaced apart sufficiently to clear the outer ends of both of the pins 175 and 176 when lever 135 is in its intermediate axially adjusted position. This yoke portion is of such depth fore-and-aft that wall 138 will not engage arm 130 of the bellcrank during stencil operations.

Ear 141 is formed with a slot 177 for receiving pin 175 when lever 135 is shifted toward the right from its neutral or stenciling adjustment position, and ear 142 is formed with a slot 178 for receiving pin 17 6 when lever 135 is shifted toward the left from neutral position. Ears 141 and 142 and their slots are preferably of the same shape and said ears and their coactive pins are preferably located different distances from the fulcrum of lever 135, as shown, so that when pin 175 is engaged with ear 141 the effective length of lever 135 is increased and the effecfixed stop consisting of the bottom face of tive length of bellcrank arm 130 is decreased, whereas, when ear 142 is engaged with pin 1 76, the effective length of lever 135 isdecreased and the effective length of arm 130 is increased, thus affording a compact arrangement for imparting the long and'short throws of necessary extent to the vibrator bellcrank from an actuating lever having a short throw of constant amplitude imparted by a type-bar-actuated universal bar which, in the machine shown, as is usual, is only moved by the type bars during the latter portion ofthe printing strokes of the type bars. Each of the slots 177 and 178 is enlarged or widened at its forward edge at the lower end of the slot to provide a substantially circular lower end portion of a size substantially larger than the pin diameter to facilitate the engagement of the pins in the slots upon axial adjustment of the lever 135, said slots each being of the same width as the diameter of the pins from a point directly above the normal point of engagement of the pins therein to their upper ends. 1

The contracted major portions of theslots are straight and made sm'ficiently long to prevent the pins from abutting the upper ends of the slots before stop 136 engages hub 7 8*, while permitting such adjustment of the slotted ears 141 and 142 and bendable stop 136 as may be necessary to give proper amplitudes of movement to the vibrator for using the two zones of the ribbon. The close fit of the pins in the contracted main portions of the slots,

' effected as soon as the lever 135 starts forward, prevents the bell-crank from bounding tinued movement of the bellcrank by acquired iof the bellcrank andvibiator is greater on the long throw of these partsin using the lower zone of the ribbon and, as due to slight inaccuracies in size of the pin and slot in manufacture, or to wear, 1t 1s posslble that there may exist sufiicient play of the pin 175 in slot 17 7 to permit overthrow of the vibrator under the augmented momentum acquired on the long throw, I prefer to employ an auxiliary overthrow-preventing stop device for the bellcrank effective only when the vibrating mechanism is set for this long throw. This auxiliary stop may, however, be omitted, if desired. l

"Said auxiliary overthrow preventing means com rises a movable sto 179 consistin of an integral lug-extending forward and upward from the front edge of the transverse body part of bellcrank 124 and bendable up and down for purposes of adjustment, and a the main body partof bracket 1 26.. On the short throw of the vibrator, lug 17 9 (as shown in Figs. 10 and 18) does not move far enough tostrike bracket 126, but said lug is adjusted so as to strike the bottom face of the bracket adjacent the forward edge of the bracket as shown in Fig. 11) on the longthrow of the vibrator when stop arm 136 on lever 135 strikes hub 78 sof escapement wheel 7 8.

The color shift and stencil control means for axially adjusting lever 135 to vary the amplitude of throw of the vibrator 113 for using different zones of the ribbon, and to render the vibrator inactive for writing stencils, extends to the left hand side of the keyboard of the machine for convenient operation. The key lever guide comb 22 is formed at its ends with attachment lugs 180 abutting the inner faces of sidewalls 12 of the main frame and held theretoby pairs of screws 1 81 passed inward through the-walls and threaded through the lugs. The inner ends of'fastening screws 181 for lug 180 at the left hand endof the "comb are also threaded throughthe rearwardly extending arm 182 of an upright sheet metal bracket 182 to detachably hold said bracket to the left hand frame wall 12. Arm 182 extends through a notch or slot 22 'in comb'22, and the main body 'of bracket 182 extends upward flatwise alongside wall 12 forward of thecomb and is formed at its 7 upper end with an inwardly bent flange 183 disposed substantially horizontally.

Flange 183 is-formed with a fore-and aft extending slot 183 having its inner edge provided with a central locking notch 184 and two end locking notches 185 and 186 which notches are adapted to receive the handle arm 187 of a sheet metal bell-crank hand lever. Lever arm 187 is spring tempered and normally bowed toward the right, to automatically spring into the locking notches, and extends up through slot 183*, being provided at its upper end with a finger piece 188 for rocking the lever and for flexing it toward the left-out of the locking notches.

Thishand lever is pivotally held to the lower end of bracket 182 at a point forward of thecomb 22 by a transverse pivot screw 189, and has an arm 190 extending rearward through comb notch 22 and then upward a short distance behind the comb. A sheet metal bar 191 is pivotally connected at its front end by a transverse pivot screw 192 with the free end of hand lever arm 190, and extends rearwardly under sub-lever segment 24 and over spring anchor bar 166 to a point under partitionwall 13. Anchor bar 166 is held in slots in the forward ends of a pair of fore and-aft adjustable sheet metal bars 193 clamped to arms 43*, extending forward untension of the type'ba-r action return springs In the present construction, the rearmost one of the pair of screws 194 at the left hand side of the machine is shouldered between its head and the inner face of the adjacent bar 193 (see Fig. 8), and the rear end of bar 191 is provided with an open ended longitudinal slot 195- in its rear end through which said shouldered portion of the screw extends to slidably support and guide the rear end of the bar 191 which is confined between the screw head and inner face of bar 193, said slot 195 extending rearward and downward so that bar 191 (guided by said slot and the upward and rearward extending arm 190 of the hand lever 187) will move obliquely substantially perpendicular to the plane of the shift frame when the hand lever is rocked.

In rear of sub-lever segment 24, arm 191 is formed with an integral upstanding finger 196, bendable fore-andaft for adjustment purposes, to which is pivotally connected the forward end of a rigid wire link 197 which extends rearward and downward under wall 13 to a point adjacent the lower end of the left hand shift frame member 29 where it is pivotally connected with the outwardly extending arm 198 of a sheet metal bellcrank lever 199 pivoted on said shift frame member. As shown in Fig. 1, the link 197 is so arranged that its rear end will move, whenthe shift frame is shifted from one case position to the other, between points located equal distances below and above an oblique plane perpendicular tothe plane of shiftof the shift frame and passing through the point ofconneetion of the forward end of the link with finger 196, so that the action of the hand lever on the bell crank 199 will be the same in either case position of theshift frame and the adjustment of lever 135 will not be disturbed by case shift movements of the shift frame.

In the Corona machine previously referred to, the upper case stop screws 44 are carried by the outer ends of a pair of sheet metal bars 200 each fastened by two screws 201 to the under faces of lugs 202 stamped forward out of the main transverse body portions of the shift frame members 29, said lugs lying flatwise in a plane perpendicular to the plane of movement of the shift frame. In the present construction, a simple and elficient mounting for bell-crank 199 on the shift frame is af- Y by forming the middle portion of bellcrank 199 with two superposed pivot ears 203 through which said bearing portionof screw 201 extends, the lower ear resting ontheheacl of the screw and the upper ear engaging under bar 200.

To the-right of pivot ears 203, bellcrank 199 is'provided with an arm 204 extending rearward through the aperture 205 in shift frame member 29, afforded by the stamping out of lug 202, and connected in rear of member 29 with lug 46 on the adjacent rock arm 35 of the shift torsion frame by a coil spring 206 which normally draws said arm toward the left until arrested by engagement of a stop lug v207 on said arm with the front face of member 29. A rigid wire link 208 connects the rear end of arm 204 of bellcrank 199 with the tail piece 137 ofv the axially adjustable actuating lever 135 for the ribbon vibrator operating bellcrank 124.

Link-208 is permanently bendable to vary its length for proper axial positioning of lever 185. Stop lug 207 is bendable fore-andaft for purposes of adjustment and engages member 29 to prevent spring 206 from rock ing bellcrank 199 far enough to cause the left hand side of lever 185 to bind or rub on the adjacent sectional side arm of the universal bar when the vibrating mechanism is set for the -short throwof the ribbon vibrator. Spring .206 constantly tends to take up any slack in the operating train for adjusting lever 135, so that the lever will be yieldably maintained in the desired one of its axially adjusted positions, when the link 208 is once adjusted to proper'length, notwithstanding the fact that there is or may be a certain amount of lost motion in the lever adjusting train. v The operation of the ribbon mechanism-is as follows:

lVhen the handle arm of. the adjusting lever 187 is pulled forward and engaged in notch 185 of bracket 182, bellcrank, 199 is rocked to the position, shown in Figs. 1 and .9 with stop 207 engaging bracket 29, and

lever 135 is drawn toward theleft and held at the limit of its axial movement in that direction by link 208. In this position of .lever135, pin 176 projects through the enlarged lower end of slot 178 in ear 142 of the lever while pin 175 is withdrawn from slot 177 in ear 141 of the lever. On the down stroke of the character key on any one of the character key levers 19, the lug 17 on type bar 17 actuated by said key lever engages with the forward edge of universal bar 49 during the last part of the printing stroke of the type bar and pushes the universal bar rearwardly, the parts moving from the position thereof shown in Figs. 9, 13, 14, 15, 16 and 17 to that shown in Figs. 10 and 18 with the upper (usually black) zone of the ribbon sion 64 office pivotstud which connects the with rockarm 57 pushes rearwa'rdly the re- 11 ciprocable actuator 1541 through engagement ojfithe stud with the rear end of slot 155 1n the'actuator. Actuator 15 1 rocks tappet lever 146 to swing tappet 151 forward through the "engagement of arm 152 of the lever in slot 153 of the actuator, and tappet 151 rocks "lever 135 forward until movements of all parts of the before mentioned type-bar actuated train are arrested at the end of the type-bar stroke by stop 136 on lever 135 engaging behind hub 78 of line space wheel 78. It will be seen that lever 135 has a fixed extent of throw determined by the universal "bar and segment'and by stop 136 and hub 7 8". As the pin -17 6 is engaged inthe narrow upper part of slot'173' when lever 135 is "arrested and, as the pin fits snugly in this part of the slot, both the bellcrank 1'24 and the ribbon guide 113 positivelyconnected "therewith are positively arrested when lever 135 isarres'ted, stop 136 and 78 thus acting to prevent overthrow of the ribbon guide "through the positive connecting train from the guide to lever 135. It will be seen from "Figs. 10 and 18 that stop 179 on the bellment ofribbon actuator 15 1 rocks shaft 164 through arms 15 1' and 170 and; connecting link 171 to throw arms 163 forward and rock the ribbon spool rotating. pawls 161 through links '162connecting said pawls with arms '163-to turn the spool on which the ribbon .is being reeled. This rocking of shaft 164: swings arm 165 rearward and stretches return spring 159. Onthe up stroke of the actuated character keyhthe several type bar actuated parts of the ribbon mechanism are returned to nor- "Infill posit-ion by the action-of springs 159 and 108, assisted somewhat by spring'17 2 and dog rocker return spring 91, the normal position of the parts of the ribbon mechanism being determined by the abutment of universal *bar49 against the front wall of recess 15 in may be alternatively engaged with or both "disengaged from their coacting slots in ac- 't-uatinglever 135 by axial shifting of the lever which is guided to slide in a predetermined normal plane by rod 30 and the sliding engagement between flat transverse wall 138 of lever 135 and the nose of tappet 151 on lever146.

7 T0 :set'the vibrating medhanism for the long throw of the guide to use the lower (usually red) zone of the ribbon, hand lever 187is rocked to the opposite limit of its throw :andyenga'ged in locking notch 186 in bracket. 132, :thereby sliding lever 135 axially toward the'right to a position in which pin 175 is engaged in slot 177 of ear 141 of lever 135 and pin 176 is entirelyjwithdrawn from slot '17 8 in ear 142, this position of the lever 135 being slightly to the right of that shown in Fig. 7 wherein both pins are shown disengaged with lever 187 set as in Fig. 8.

It will be observed that this new connected relation of lever 135 and arm 130 of bell-ag crank 124 changes the leverage by establishing "a motion-transmitting connection between said lever and bel'lcrank which is nearer to the axis 129 of th'e bellcrank and farther from the axis 30 ofthe lever than that estab-f arm 1'30is such that the guide is given aff" substantially greater throw from lever 135 in the new setting although lever 135 swings through the same arc on the printing stroke of'a type bar and isarrestedat the same point by Stop 136 striking'lmb78 as the type completes its printing stroke.

The augmented throw of the bellcrankis such that when stops 136 and 78 engage the lower zone of the ribbon is interposed between the type and platen at'the instant of type impact, as shown in Fig. 11. WVhenthe guide reaches the position of Fig. 11 pin 175 is engaged in the narrow part of slot 1770f ear 1 11 and the guide will be held against overthrow'by stops 136 and 7 8 and the positive connecting train between the guide and lever As a precaution against possible overthrow of the guide due to increased momentum of the guide and/or the bellcrank on the long throw, stops 179 and 126 are provided, stop 179 on bellcrairk for-ward of the bellcrank axis being adjusted to strike bracket 126 when stops 136'and 7 8 engage to prevent possible j overthrow of the bell'crank and guide due to" any looseness of fit of pin 175 in slot 177.

To render the guide inactive during making of stencils, lever 187 is shifted to its intermediate position and engaged in locking *no'tch 184: as shown in Fig. '8 to slide lever 135 axially to its intermediate axially adjusted position, as shown in Fig. 7, wherein both pins are disengaged from the slotted ears of lever 135. On the printing strokes of the type bars with lever 135 adjusted as just described, all the ribbon actuating devices except bellcrank 12 1 and guide 113 move as before described, lever 135 swinging forward until stops 136 and 78 engage, as shown in Fig. 12.

7 It will be observed from Figs. 7 and 12 that ears 14:1 and 142 and walls 139 and 1 10 move forwardly at either side of the outer ends of the pins 17 5 and 176 and that lever 135 is arrested before wall 138 moves far laterally from opposite sides of the pendent bellcrank arm at different distances from the axis; of the-bellcrank, an upstanding actuating lever to the rear of the pendent bell-crank arm mounted at its lower end to swing about an axis parallel with the bellcrank axis and to slide axially relatively to the bellcrank, said lever having a pair of transversely spaced ears at opposite sides of the pendent bellcrank arm each formed with an up and down extending slot in which the adjacent pin is engageable, means for rocking said lever at the type strokes, a stop carried by said lever, a relatively stationary abutment engageable by said stop in the difierent'axially adjusted positions of said lever at every type stroke to positively limit the forward throw of the lever, and manually operablemeans for shifting said lever axially at will'in opposite directions to engage one of said pins with the slot in one of said ears and disengage the other pin from the slot in the other ear.

2. In a typewriting machine, the combination of 'a bellcrank having a forwardly extending arm and a pendent arm, a ribbon guide connected with the forwardly extend- .ing bellcrank arm, a pair of pins projecting laterally from opposite sides of the pendent I bellcrank arm at different distances from the axis of the bellcrank, an upstanding actuat ing lever to the rear of the pendent bellcrank arm mounted at its lower end to swing about an axis parallel with the bellcrank axis and to slide axially relatively to the bellcrank,

said lever having a pair of transversely spaced ears at opposite sides of the pendent bellcrank arm each formed with an up and .down extending slot in which the adjacent axially adjusted positions of the lever at every type stroke to positively limit the forward throw of the lever, manually operable means for shifting said lever axially at will in opposite directions to engage one of said pins with the slot in one of said ears and disengage the otherpin from the slot in the other ear, and stopping means cooperative directly with the bellcrank and effective only on the long throw of said bellcrank for preventing overthrow of the vibrator.

3. In a typewriting machine, a platen shift frame movable up and down to change case,

a bellcrank pivotally mounted on the shift frame having a forwardly extending arm and a pendent arm, a ribbon vibrator connected directly with the forwardly extending 7 bellcrank arm, a pair of pins carried by the pendent bellcrank arm and projecting laterally therefrom at opposite sides of the arm at different distances from the axis of the bellcrank, a return spring normally rocking the bellcrank in a direction to lower the vibrator, stops on the bellcrank and shift frame for arresting return movement of the bellcrank, an upstanding lever pivotally and axially slidably mounted at its lower end on,

the shift frame to swing fore-and-aft and slide transversely of the machine, said lever having laterally spaced ears at opposite sides of the pendent bellcrank arm each formed with an up and down extending slot for receiving oneof said pins, a transversely extending tappet lever mounted on the shift frame intermediate its ends to swing about an axis perpendicular to the axis of the upstanding lever and having onearm provided with a tappet engaged with said upstanding lever in all axially adjusted positions of the lever, stops on the upstanding lever and shift frame for limiting the forward throw of said lever by the tappet lever, a fore-and-aft reciprocable actuator for the tappet lever ,mounted on the main frame and provided with an up and down'extendin'g slot parallel is engaged, a universal bar connected with the actuator for reciprocating the same, and means operable at will for sliding the upstanding lever axially in opposite directions to engage one pinwith one lever ear and disengage the other pin from the other lever ear.

l. In a typewriting machine, a platen shift frame movable up and down to change case, a bellcrank pivotally mounted on the shift frame having a forwardly extending arm and a pendent arm, a ribbon vibrator connected directly with the forwardly extending bellcrank arm, a pair of pins carried by the pendent bellcrank arm and projecting laterally therefrom at opposite sides of the arm at different distances from the axis of the bellcrank, a return spring normally'rocking the bellcrank in a direction to lower the vibrator, stops on the bellcrank and shift frame for arresting return movement of'the bellcrank, an upstanding lever pivotally and axially slidably mounted at its lower end on the shiftframe to swing, fore-and-aft and slide transversely of the machine, said lever having laterally spaced ears atopposite sides of the pendent bellcrank arm each formed with an up and down extending slot for receivlng one of said p1ns,a transversely extending tappet lever mounted on the shift frame intermediate its ends to swing about an axis perpendicular to the axis of the up-V standing lever and having onearm provided with a tappet engaged wlth sald upstanding lever in all axially ad]usted positions of the lever, stops on the upstanding lever and shift with an up and down extending slot parallel with the path of movement of the shift frame in which the other arm ofthetappet lever is engaged, a universal bar Connected with the actuator for reciprocating the same, a spring connected with the upstanding lever for rocking the same rearwardly against the tappet on the tappet lever, -means for determining the normal position of the universal bar and actuator, and means operable at will for sliding the upstanding lever axially between two positions in which different ones of said pins are connected with different ones of the lever ears and to an intermediate position in which neither pin is engaged with the lever.

5. In a typewriting machine, the combina tion of a ribbon vibrator actuating bellcrank, a pivoted line locking member, and a coil return spring connected at its opposite ends with said bellcrank and member for yieldably holding the bellcrank and line-locking member in their respective normal idle positions. V

6. In a typewriting machine having a rotary escapement including an escapement wheel shaft and an escapement wheel held to said shaft to turn therewith and having a hub, the combination of a ribbon vibrator, and key actuated means for operating said vibrator including a lever having two spaced bearings on the escapement wheel shaft and escapement wheel hub respectively and oscillatable thereabout. v

7. In a typewriting machine, the combination of a rotary escapement including an escapementwheel shaft extending in an up and down direction and an escapement wtheel having a hub held to said shaft, a ribbon vibrator, a bellcrank having a forwardly extend-ing arm connected with the vibrator and a pendent arm, an upstanding actuating lever connected with thependent bellcrank "arm and having a stop arm engageable with the hub of the escapement wheel to limit the for ward throw thereof, a tappet lever engaged behind the upstanding lever and having'superposed bearings on the escapement-wheel shaft and escapement wheel hub respectively for oscillation of said tappet -lever thereabout, and key-actuated means for oscillating the tappetlever. A

'8; In a typewritingmaohine, the combination of a carriage bed, a rotary escapement including an escapement wheel shaft and an 'escap'ement wheel fixed on the shaft and having a hub, anescapement bracket held to the carriage bed, a bear-ing bushing for the shaft held tos'aid bracket above the wheel, a linelocking latchpivoted on said bushing to turn thereabout, a bell-crank supporting bracket held to the carriage bed forward of the escapement bracket, a ribbon vibrator, a bellcrank pivoted in said bellcrank supporting bracket and having a forwardly extending arm connected with the'vibra'tor and a pendent arm, a coiled "return springconnected at its opposite ends with the 'b ellcrank'an d line-locking latch for lowering the ribbon vibrator and retractingthe 1 latch to inactive position, a stop on the bellcrank engageable with the escapement bracket tolimit return movement -of the bellcrank, an upstanding fore-an'd-aft swinging lever connected with the pendent arm of the bellcrank for lifting the vibrator, a stop ontheupstanding leverengageable with the escapement wheel hub to limit the forward throw of said lever, a tappet lever pivotallymountedon the escapement wheel shaft to oscillate the'reabout and engaged behind the up standi-ng lever,'a nd carriage bed, a bearing bushing for the shaftheld to said bracket above the wheel, a linelocking latch pivotedon said bushing to turn thereabout, a bellcrank supporting bracket held to the carriage bed forward of the escapement bracket, a ribbon vibrator, a bellcrank pivoted insaid bellcrank supporting bracket and having a forwardly extending arm connected with the vibrator and a pendent arm, a coiled return spring connected at its opposite ends with the bellcrank and linelocking latch for lowering the ribbon vibrator and retracting the latch to inactive position, a stop on the bellcrank engageable with the escapement bracket to limit return movement of the bellcrank, an upstanding'foreand-aft swinging lever connected with the pendent arm of the bellcrank for lifting the vibrator, a stop on the upstanding lever engageable with the escapement wheel hub to limit the forward throw of said lever, a tappet lever'pivotally mounted on the escapement wheel shaft to oscillate thereabout and engaged behind the upstanding lever, a dog rocker pivoted in the escapement bracket to rock in the same direction-as the upstanding. lever at the type strokes, a coil spring c0nrockerto' hold the upstanding lever to the tappet lever, means for disconnecting the up standing lever from the bellcrank at will, a universal bar, and connections between the universal bar and said dog rocker and tappet lever icr oscillating the rocker and lever at the type strokes. 1

10. In a typewriting machine, the combination of a main frame, a platen shift frame movable up and down to change case, a ribbon vibrator, means mounted on the shift frame for vibrating the vibrator, including a member adjustable transversely of the machine to vary the throw of the vibrator by said means and to render said means ineffective to vibrate the vibrator, universal bar actuated means on the main frame for actuating said vibrator vibrating means on the shift frame, and means for adjusting said member, said last-mentioned means comprising a hand lever pivoted on the main frame at one side of the keyboard of the machine, a

fore-and-aft extending bar pivoted at its forward end to said hand lever, means slidably supporting the rear end of said bar on the main frame, a bellcrank pivoted on the shift frame to rock about an up and down extending axis and having a laterally extending arm and a fore-and-aft extending arm, a fore-and-aft extending link connecting said bar and laterally extending bellcrank arm and arranged for equal movement of its rear end above and below a plane'perpendicular to the path of shift of the shift frame bisecting the connection of the forward end of the link with said bar, and a transversely extending link connecting the fore-and-aft extending bellcrank arm with said transversely adjustable member of the vibrator vibrating means on the shift frame. 7

11. In a typewriting machine, the combination of a main frame, a platen carriage, a shift frame supportingthe carriage, a typebar actuated universal bar having rearwardly extending side arms formed with longitudinal slots at their rear ends, a rock shaft j ournalled on the main frame, extending through the slots in said side arms, rock arms on said shaft connected with the shift frame, shift-key-operated means for rocking said shaft and arms to shift the shift frame, a fore-and-aft rockable universal bar support mounted on the main frame forward of said rock shaft, pivots connecting the universal bar side arms with'said fore-and-aft rockable support, a fore-and-aft extending ribbon actuator connected with one of said pivots adjacent its forward end and having -a longitudinal slot in its rear end through which said rock shaft extends, said actuator having a lever-operating slot therein extending parallel with the path of movement of the shift frame, a tappet lever pivoted on the shift frame to swing transversely of the path of movement of the shift frame and having a transversely extending arm slidably engaged in said operating slot in the actuator and also having a transversely extending tappet arm, a fore-and-aft rockable lever pivotally mounted on the shift frame behind which said tappet arm is engaged, a bellcrank pivoted on the shift frame having a pendent arm connected with said fore-and-a ft rockable lever and a forwardly extending arm, and a ribbon vibrator connected with the forwardly extending bellcrank arm.

12. In a typewri ing machine, the cOmbination of a main frame, a platen carriage, a shift frame supporting the carriage, a typebar actuated universal bar having rear'wardly extending side arms formed with longitudinal slots at their rear ends, a rock shaft jour nalled on the main frame extending through the slots in said side arms,'-rock arms on said shaft connected with the shift frame, shiftkey-operated means for rocking said shaft and arms to shift the shift frame, a fore-andaft rockable universal bar support mounted on the main frame forward of said rock shaft,

pivots connecting the universal bar side arms 7 with said fore-and-aft rockable support, a fore-and-aft extending ribbon actuator, connected with one of said pivots adjacent'its forward end and having a longitudinal slot in its rear end through which said rock shaft extends, said actuator having a lever-operating slot therein extending parallel with the path of movement of the shift frame, a lever pivoted on the shift frame to swing about an up-and-down extending axis and having an arm slidably engaged in said lever-operating slot in the actuator, a ribbon vibrator, and means on the shift frame forming a connec-' tion between said vibrator and said lever for vibrating said vibrator and shifting the vi brator bodily with the shift frame.

13. In a typewritlng machine, the combination of a rlbbon vibrator, a two-armed lever having one of its arms connected with the vi-- brator and its other arm provided with two oppos tely extending lateral projections, an actuating lever for the two-armed lever having a single arm provided with a flat portion parallel with its axis and two laterally spaced projection-engaging portions cooperative alternately with said projections on the twoarmed lever for rocking the latter lever dif-- ferent extents, means slidably and pivotally connecting the other projection-engaging portion and projection, and a key-operated tappet cooperative with the said flat portion of the actuating lever in both axially adjusted positions of the lever.

14:. In a typewriter machine, the combination of a main frame, key operated types on the main frame, a platen, a case-shift frame for case shifting the platen up and down, a ribbon guide, means on the shift frame for imparting covering throws of two different extents to the guide, said means including an upstanding lever mounted at its lower end on the shift frame to swing fore-and-aft of the machine to vibrate the guide and slide axial ly to different transversely adjusted positions in which it is adapted to impart diflerent throws to the guide, a two-armed lever on the shiftframe one arm of whichswings transversely of the machine, a link extending transversely of the machine and connecting said transversely swinging arm of said two-armed lever withsaid axially slidable lever adjacent the axis of the latter lever, a manually shiftable adjusting device for the axially adjustable lever mounted on the main frame, and a link connected at one end with said device for'endwise movement thereby and connected, at its other end with the remaining arm of sa-id two-armed lever, said link arranged for rocking 'said two arm lever when moved endwise and for swinging up and down during case-shift movements of the shift frame, and means for rocking said axially adjustable lever uniformly fore-and-aft of the machine at the key strokes in all case positions of the platen.

15. In a typewriting machine, the combination of a vibratory ribbon guide, a bellcrank mounted to rock about a horizontal axis which extends transversely of the machine, said bellcrank I having a forwardly extending arm directly connected with the ribbon guide and a pendent arm, a key-actuated tappet mounted to rock aboutan upstanding axis,-a n upstanding lever interposed directly between the tappet and the pendent arm of the belltion of a vibratory ribbon guide, a bellcrank crank for oscillating the bellcrank and rockable about and shiftable along an axis parallel with the axis of the bellcrank, and means for shifting'the upstanding leverlongitudinally of its axis between two motiontransmitting positions, in both of which it is movable the same extent by the tappet, and in one of which it is operatively connected with the pendent bellcrank arm closer to theaxis of the bellcrank than in the other.

16. Ina typewriting machine, the combinamounted to rock about an axis extending transversely of the machine and having a forwardly extending arm connected with the ribbon guide and'a pendant arm, an upstanding lever rockable fore and aft'of the machine and shifta-ble transversely of the machine from a position in which it is ineffective on the pendent bell-crank arm to either of two positions in which it is operatively connected with said arm at different distances from the bellcrank axis, a tappet lever mounted to swing about an upstanding axis and having a contact portion coactive with said upstanding lever the same distance from the .axis of the upstanding lever in all adjusted posi: tions of the upstanding lever, and means for vibrating the tappet lever at the key strokes.

17. In a typewriting machine, the combination of a vibratory ribbon guide, a -bellcrank having a forwardly extending arm connected with the ribbon guide and a pendentsliding the upstanding lever along said support while in operative relation with said tappet lever into either of-three positions, in one of which it is operatively disconnected from the pendent bellcrank arm and in the other two of which it is operatively connected with the pendent bellcrank arm different distances from the axis of the bellcrank.

18. In a typewriting machine, the combination of a main frame, a shift frame, a vibratory ribbon guide, a bellcrank supported on the shift frame to rock about an axis extending transversely of the machine and having a forwardly extending arm directly connected with the ribbon guide and a pendent arm, an upstanding lever supported on the shift frame to rock about andshift along pendent bellcrank arm to either of two posi-- tions in which it is operatively connected with said armat different distances from the bellcrank axis, a tappet mounted on the shift frame to swing about an upstanding axis and having a contact portion coactive with the upstanding lever in all slidably adjusted positions of the upstanding lever, and means on the mainframe for vibrating the tappet uniformly at the key strokes irrespectiveof the case position of the shift frame.

19. In a typewriting machine, the combination of a main frame, a platen shift frame, a platen on the shift frame, a vibratory ribbon guide, a bellcrank pivoted on a'transverse axis on the shift frame and having an arm connected with said guide and a pendent arm, a tappet pivoted on the shift frame to vibrate about an upstanding axis, means on the main frame for vibrating the tappet uniformly, at the key strokes in all case positions of the shift frame, an upstanding motion-transmitting lever mounted on-the shift frame to rock about and shift along an

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