US1433112A - barr and e - Google Patents

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US1433112A
US1433112A US1433112DA US1433112A US 1433112 A US1433112 A US 1433112A US 1433112D A US1433112D A US 1433112DA US 1433112 A US1433112 A US 1433112A
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latch
key
shiftable
shift
arm
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/24Case-shift mechanisms; Fount-change arrangements

Description

J. H. BARR AND E. E.. BARNEY.

TYPEWRITING MACHINE. APPLICATION FILED AUG. I6, 1920.

Patented ,Oct. 24, 1922.

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Mmm 61.; 35/9 rjw'i 5 M ATTEIRNEY 5 E. 5 5 E N n W J. H. BARR AND E. E BARNEY.

TYPEWRITING MACHINE. APPLiCATlON FILED AUG.16, 1920.

Patented Oct. 24,1922.

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Patented 00a 24,1922;

.I. H. BARR AND E. E. BARNEY.

TYPEWRITING MACHINE.

APr ucmoN FILED AUG. 16, 1920.

I lN\/ ENTEIR5 1 jakmm umanw ATTURNEY WITNEEEEE J. H. BARR AND E. E. BARNEY.

'TYPEWRITING MACHINE.

APPLICATION FILED AUG.16, 1920.

Patented Oct. 24,1922.

5 SHEETS-SHEET 5.

WITNESSES awvwtou Patented Oct. 24, 1922.

airs STATES PATENT caries.

JOHN H. BARR, or NEW YORK, N. Y.,' A D EDWIN a BARNEY, or NEWARK, NEW

JERSEY, ASSIGNOR-S r0 REMINGTON TYPEWRITER COMPANY, or ILION, NEW YORK, A CORPORATION or NEW YDRK. I

TYrnWnrrrNs MACHINE.

Application filed August 16, 1920. Serial No. 403,780.

To all whom it may concern:

Be it known that we, JOHN H. BARR and EDWIN E. BARNEY, citizens of the United States, and residents, respectively, of the city, county and State of New York, and

Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Typewritingv Machines, of which the following is a speci fication. 7

Our present invention relates to case shifting devices for typewriting machines, and its principal object is to provide new and improved devices of the character specified. In the form shown in the drawings our invention is. adapted to shift the type bar system but it is to be understood that the invention is applicable to devices for otherwise effecting the case shift.

To the above and other ends which will hereinafter appear, our present invention consists in the features of construction, combinations of devices, and arrangements of parts hereinafter described and particularly pointed out in the claims.

In the accompanying drawings which illustrate the preferred form of our invention,

Figure 1 is a front to rear vertical sectional view of a typewriting mach ne embodying said invention, parts of said machine being omitted and parts broken away and the front or keyboard portion at the left of the figure being transposed above and. somewhat to the right of its usual position.

Figure 2 is a vertical sectional view taken on planes indicated by the dotted line 00 m in Figure 1 and looking forward.

Figure 3 is a horizontal sectional View taken on a plane indicated by the dotted line i/ y in Figure l and looking downward.

Figure 4c is adetail sectional view taken on a plane indicated by the dotted line a a in Figure 3 and looking in the direction of the arrow at said line. I i

Figure 5 is a fragmentary perspective view of a detail; I

Figure 6 is a fragmentary vertical sectional view corresponding to Figure 1 but showing the parts as they are related when the type bar system is shifted. v

Figure 7 is an enlarged vertical sectional view taken on a plane indicated by the cured together by screws 3.

dotted line Z) in igure 6 and looking forward in the direction of the arrow at said line, said figure illustrating certain of the shift key lock devices.

Figure 8 is an enlarged perspective view of certain of the shift key lock devices.

Figure 9 is a vertical sectional View taken on a plane indicated by the dotted line 2 1n F igure 1 and looking rearward in the direction of the arrow at said line.

Figure 10 1s a fragmentary perspective View of the locking devices for the shiftable type bar support or segment.

Figure 11 is a fragmentary vertical sectional View illustrating a modified construction of the shift key locking mechanism.

Figure 12 is a vertical sectional view corresponding toFigure .11 but illustrating the locking mechanism when in effective posit1on or when the type'bar support is shifted.

' F igure 13 is a transverse vertical sectional view taken on a plane indicated by the dotted line 0 0 in Figure 1 1 and looking forward in the direction of the arrow at said line.

I Figure leis a vertical sectional view taken on a plane indicated by the dotted line (Z (Z in Figure 18 and looking in the direction of the arrow at said line.

frames or plates 1 preferably formed with openings and connected at the rear by a cross plate 2, the frame members being se- A U-shaped frame member 4; is connected to the front portions of the side plates 1 and encloses the keyboard. Above the main frame is arranged a platen 5, diagrammatically illustrated, said platen being mounted on a carriage, not shown, which is adapted for movement back and forth from side to side of the machine under the control of devices including suitable escapement mecha nism. v

C o-operative with the front face of the platen are type bars 6 pivoted on a common fulcrum wire 7 that is mounted on a segmental support 8, each type bar being provided with two types, a lower case type 6 and an upper case type 6'. The type bars near its top.

are arranged in radial slots 9 formed in said support and normally are horizontally disposed, their free end portions resting on a pad 10 mounted on a segmental rest 11. The end portions of this rest are secured by screws 12 to the forward ends of arms 13 extending horizontally forward from the segment or support 8 near its ends. The arms 13 and segment 8 are connected together by screws 14:. The rear portions of the type bars 6 are provided each with a slot 15 with which co-operates a headed pin 16 fixed to the rear end of the longer horizontal arm of a bell crank 17 pivoted on a fulcrum wire 17 common to all of the bell cranks, said fulcrum wire being mounted on the segment 11. The rear portion of said segment is formed with guide slots 11- in which the bell cranks 17 are arranged. The shorter arm of each bell crank has connected to it the forward end of a link 18, the rear end of said link being pivotally connected to an arm of .a lever 19 fulcrumed on a rectangular frame member 20 that is horizontally arranged within the base of the machine and detachably secured thereto by screws 21. The sub-frame or member 20 is provided with a rearwardly extending lip or ledge potion 20 The full train of type bar actuating devices is not disclosed herein nor is the type bar action or system claimed per se since it forms no part of the present invention. The type bar segment 8 is secured to a supporting frame or bracket member, designated as a whole by the reference numeral 22, by means of the screws 14-. The bracket member is vertically arranged behind the type bar segment and the screws 14: pass through the segment into ears 22 projecting inward from the bracket The bracket as a whole is curved to conform to the curve of the segment, its front being formed with a channel 23 housing the rear end portions of the type bars. Centrally the bracket is provided with a rearwardly and downwardly curving arm 241- and at its sides said bracket is formed with outwardly extending lugs 25 having plain vertical outer faces 26. Pivota-lly con nected by shoulder screws 27 to the outer faces of the lugs 25 are horizontally disposed and rearwardly extending arms or links 28, these arms bearing on the shouldered portions of the screws 27 which are screwed into the lugs 25. The arms 28 at their rear end portions are provided with collars 29 which fit over the end portions of a rock shaft 30, thecollars being pinned thereto by pins 31. The rock shaft 30 extends from side to side of the machine at its upper rear portion, and at the righthand side, viewed from the rear as in Fig. 2. is formed with a depressed portion 80 to accommodate mechanism, not

shown, including the spring drum shaft. At

its ends the rock shaft 30 is formedwith depressions indicated at 32 which receive rounded end portions 33 of pivot pins 34 projecting horizontally inward from the side plates 1, said pins being accommodated in holes in the side plates and being adjustably secured to the side plates by downwardly extending set screws 35. The construction in effect provides a rock shaft 30 and crank arms 28 near the ends thereof to sup portand guide the shiftable element comprising the bracket 22, the type bar segment 8 and the rest 11. This element is further guided by the heads of adjustable screws 36 which are secured in the side frames 1 and project inward therefrom, being adjustably locked to said side frames by locking nuts 37. The tops of the heads or inner faces of said screws 36 are adapted to co-operate with the plain faces 26 of the bracket 22 and are so adjusted that while they do not generate friction that would interfere with the shifting movements of said bracket, they so cooperate with the'faces 26 as to prevent undue side shake or vibration of the shiftable member.

The guiding and controlling of the shift able member is further assisted by devices comprising a link or arm 38 which, as will be understood from Figs. 1, 2, 3, 9 and 10, is centrally ararnged. at the base of the machine, said link extending horizontally fore and aft of the machine and its forward end being pivotally connected by a shoulder screw 39 to the curved arm 24, the lower end of said arm being provided with a rightwardly extending projection or boss 40 which receives said shoulder screw. The rear end portion of the arm or link 88 is perforated to fit loosely over a rock shaft 41, said rock shaft being supported from lugs 2 which project forward from the inner face of the frame plate 2. These lugs are formed with perforations 42, said per forations having open months 42 at their forward sides, contracted so that the distance across these mouth portions is slightly less than the diameter of the perforations. The perforations 42 accommodate bushings or bearing members provided with collarportions idwhich receive set screws by which the bushings may be held in fixed relationship with the rock shaft tl which passes through them and over which thev fit. The bushings take a bearing engage ment in the perforations 42 and are of. greater diameter than the months 12 so that when they are engaged in the bearing openings 42 (as in Figs. 2 and 3) the rock shaft 41 cannot be displaced forward through the months 42. However, by loosening the set screws the bushings 43 may be releaser and slid along the shaft l -1 out of engagement with their bea'ings, permitting the rock shaft to be removed by being drawn said bearings, the rockshaftbeing'of lesser diameter than these mouths. The with-Q drawn position of the bushings is shown in Fig. -l and in dotted lines in Fig.2. There are three lugs'EZQ, one near each side of the machine and one centrally arranged between them and three corresponding bushings,'so that theconstruction provides a stable support for the rock shaft, while at the same time permitting its convenient withdrawal and replacement. As stated, the link 38 bears loosely on'the rock shaft 4 1, said link being contiguous to the central h1g2 and being disposed at the right of said lug. The link 38 isloos'ely confined between the cen tral lug 2 and a crank arm or operating arm 46, this crank arm being provided with a hub 47 which fits over the rock shaft 41 and is pinned thereto by a pin 48. wThe crank arm extends forward from the rock shaft andits free end is adapted to cooperate with a latch or looking member com prised in, a mechanism which is adapted automatically to maintain the shiftable type bar element, locked in its normal position. Said latch, indicated by the numeral 49, is

pivoted on a shoulder screw 50 which is supported on the link 38, the latch being in the same vertical plane with the crank arm 46, so that the free end of said crank arm may bear on a bearing face 51 with which the'latch is provided above its pivot 50. Below said pivot the tail portion of the latch is perforated to receive the hooked end of a coiled spring 52, .theopposite end of said spring being anchored to the link or latch support 38, the tendency of said spring being constantly to swing the upper arm of said latch forward; Said upperarm terminates in a hook portionhaving a horizontally disposed plain or. engaging face 53. This face is adapted normally to overlie the rearwardly extending end portion .of a T-shaped latch plate 54 secured by screws to a thickened portion or boss 20 of the ledge 20" of the frame plate 20. Normally the latch 49 overlies and engages with the plate 54;, as clearly shown in Figs. 1 and 10, its forward movement being limited by contact with the end of said plate. At this time the shiftable type bar support'is in its lower case position so that the inner or lower case types on the type bars may co-operate with the printing face of the platen 5-. Ad justment ofthe latch plate 54 is afforded by,

a screw 56 which is threaded upward through the ledge 20 and engages the under face of the plate 54 behind the securing screws By loosening these screws and advancing upward the screw 56, the engaging or rear endof the-plate 54 may be raised or lifted. Likewise said plate may be depressed by lowering the engaging end of" the screw 56 and correspondingly tightening the securing screws 55. The screw 56 passes through the ledge 20 in rear of the thickened portion 20* so that the upper end of the engaging portion of the screw 56 is clear of the ledge, as shown in Fig. 1.

- Assisting to maintain the type bar support in its case positions are stop devices comprising headed screws 57 and 58 which are supported on the arm 24: and are adapted to co-operate with the ledge 2O which serves as a stationary frame stop or arresting device. The arm 24- is provided at its sides with flanges or thickened portions 24? which serve. to strengthen the arm and also afford sufficient stock for threading in the stop screws .57 and 58. The lower portion of the arm 24 is so shaped as loosely to embrace the ledge 20, the screws 57 and 58 being arranged respectively below and above said ledge so that their heads may contact therewith at the thickened portion 20?. The screw 57 is threaded down through the lower end of the arm 24 so that the screw head may contact with the under face of said ledge when the type bar support is in its lower case position, this in the present instance being when the type bar support is in its raised or uppermost position. The stop screw 58 is threaded upward into the arm 24;. so that the head of said screw may contact with the upper face of the ledge to arrestthe type bar support or segment when it is depressed to bring the upper case types 6 into position for use. This upper case position is illustrated in Fig. 6. Adjustability of'the segment stops or screws 57 and 58 is of course essential and in order to tally disposed and their connecting or cross portions 60 are contiguous to the frame plate 2, the ends of their outer arms 60 overlying the stationary ledge 20 The inner arms 60 of said spring members extend forward in parallelism and terminate at opposite sides of the arm 24, their ends underlying a cross pin 61 extending through said arm. At the bends formed between the arms 60 and theparts 6O of the springmembers they are sup-ported on a bracket or .plate 62 which isarranged below the forwardly curved top. portion of the cross plate 2 and 1S loosely secured thereto by a headed screw 63 passing downward through said.

i top portion. The bracket 62 has side ledges or lips 6d terminating forwardly in some what higher extensions 65. The spring members overlie and rest on the side ledges or Walls 64, and theinner arms 60 extend forward inside of said walls and contiguous to the extensions 65 with the inner faces of which the spring arms are adapted to contact. The construction is such that while the spring members 60 are supported on the bracket 62, and are held against sidewise displacement by the parts 65 of said. bracket, nevertheless the free action of the spring arms is not impeded by the bracket. hen the type bar element 'is shifted downward the spring arms 6O are flexed, subjecting the cross portions 60 to torsion, and when, the shifted element is released the flexed spring arms operate to return it or restore it to its uppermost position with the stop screw 57 in contact with the under face of the stationary stop 20 During this back and forth shiftingmovement the latch at) will be automatically actuated, as will hereinafter appear,

Key actuated devices are provided for op erating the case shift mechanism, said devices comprising, as best appears from Figs. 1, 2, 3 and 6, crank arms 66 secured to opposite end portions of the rock shaft 41, each crank arm 66 having a hub or collar portion 6? which is secured by a pin 68 to the rock shaft 41 outside the end bearings 2*. These crank arms may act in co-opcration with the end bearings 2 to prevent endwise displacement of the rock shaft ll, The crank arms depend from the rock shaft and each is provided with a laterally projecting pin or rivet 69 having a rectangular head. Each pin 69 passes through a slotway 70 formed in the rear end of a forwardly extending link 71. In assembling, the head of the pin is horizontally disposed and passes through the slot readily, "and thereafter the pin is turned and set so as to bring; the head crosswise of the slot, the construction preventing disconnection of the link 71 from its associate crank arm 66. The for ward end of each link is pivotally connected at 72 with an angular lever 7 ful crumed on a rod 74 mounted upon the detachable sub-frame 20, each lever 73 being guided in a guide slot in said frame. The forward portion of each of said levers 73 passes through slots 75 and 7 6 formed respectively in two parts 77 and T8 of a comb plate or slotted guidemember, the'mounting of which will be more particularly de scribed in connection with the modification illustrated in Figs 11-15. Each shift key lever 73 terminates forwardly in an upturned stem which is provided with a shift' key or button 79, the two shift keys being arranged one at each of the key-board. The shift keys are operated independently of esa-112 each other, the pin and slot connection (39, i0 affording lost motion so that the actuation of one of the shift keys will not affect the other or the train of devices associated with said other down to and including the associate link 71, said link remaining motionless while the crank arm 66 associated with it is free to swing rearward under the actuation of the other shift key. If found desirable each shift key and its train of devices including the key lever 73 and link 71 may be provided with suitable restoring springs. The right-hand shift key is adapted to shift the type bar system temporarily, as when it is desired to print a capital at the beginning of a sentence, while the lefthand shift key is adapted to be operated when more or less continuous upper case printing is to be done and to that end is associated with shift key loc ring devices next to be described.

Said shift key locking devices comprise a locking lever 80, best illustrated in Figs. 1, 3 and G. T he lever 80 is pivoted at 81 to the outside of the left-hand shift lever 73,

the rear arm of said lever 80 terminating in a lip 82 and its forward arm terminating in a key 83. The lip 82 overlies the upper edge of the lever 73 and acts as a stop, being normally maintained in contact with the lever 73 by a coiled spring 84 which is connected at one end to the lever 73 and at the opposite end to the forward arm of the lever 80 above its pivot. The lockin lever 80 is adapted when depressed by the Trey 83 to swing-on its fulcrum 81 against the pull of the spring 8%, this independent movement of the lever 80 being limited by a stop pin 85 which is adapted to contact with the upper edge of the lever 73, as shownin Fig. 6. After such contact further pressure on the key 83 will actuate both the lever 80 and the lever 73. Below its pivot the lever 80 is provided with a hook or latch portion 80 having a face 80" which is adapted for cooperation with a relatively stationary device, one form of which is illustut'ed in Figs. 1 and (5 S. Said device comprises a plate 86 secured by rivet-s 87 to the inner face of the left-hand side frame 1. At its lower end the plate 86 is provided with an inwardly turned stop lip 88 and near its upper end said plate carries an inwardly extending shouldered rivet or pivot pin 89 on which is pivotally supported a co-operating latch member designated as a whole by the numeral 90. Said member is U-shaped in cross section, having parallel sides 90 and 90", and itis spaced away from the plate 86 by a washer 91 surrounding the shank of the pin 89. The member 90 is prevented from accidental detachment from said pin 89 by a headed screw 92 threaded into the outer end of the pin 89. The side 90 of the member 90 adjacent the washer extending" nose' whichnormally is maintained in engagement with the stop lip 88 by'a coiledspring' 93, one'end of which is connected to a lug projecting rearward from the side 90 of'the member 90, the other end of said spring being anchored to a lugSG on the piate '86. Secured to the lower end ofthe side 90 is a member 94 comprising a semi-circular engaging device proper 95, a body or head 96 being provided witha nick for a screw driver, and a shank or threaded portion 97 which'is threaded through the side 90". A clamping nut 98 at the opposite wall of the side 90" clamps the member 94 in adjusted relationship to the. member 90. It will be observed that the pivoted member 90 is in effect spring mounted, the spring 93 normally maintaining the latching device 95 in contact with the stop 88 and contiguous to the lower end portion of the hook 80 as in Fig. 1.. Vithen 'thekey. 83 is depressed it will swing the lever SOon its pivot 81 which initially will remain stationary, with the result that the member 90will be swung on its pivot 89 against the spring 93.. This movement will continue until, a result of the actuation of the key 83, the lever 80 and the lever. 73 will be swung downward far enough tobring the locking facef80 past the straight inclined face of the detent or I latch part 95, which will then be swung or. snapped forward by the spring 93 until the two parts interlock as in Fig. .6. the result beingthat the shift key mechanism Wlll be locked down and the parts controlled thereby correspondingly locked in abnormaloru pper case position. The I forward swing of the member 90 willbelimited by the stop 88, and the parts are arrangedfso that a sub sequent depression of the left-hand key 79 will release the leverSO and allow its hook portio1f80" to be swung forward by the swing the associate lever 73 onIits pivot,

forcing the link 1 rearward and causing it through action on the pin 69 to swing the associate crank arm 66 rearward, rocking the shaft 41. As said shaft is rocked the crank arm 46will be'swung downward and.

its forward end acting on the, contact face will swing the latch 49,011 "its pivotalcenter 50. Itwill, be observed from 1 that normally the crank arm 46 contacts only Wltllill? rear end portion of 'thecon-' tact surface 51 somewhat behind and above the pivotal'center of the latch 49, the faces of the two'parts being at an angle. Conse- 1 uently the initial swinging movement of the latch under the action of crank arm will. be independent of the supporting link 38 arm 46 contacts fully with the cont-act face 51 substantially through its length, the

spring 52 being stretched as a result of this turning movement ofthe latch. This initial.

swinging movement of the latch will carry its hooked upper end 53 rearward and clear of the plate 54 with which it normally engages. After the latch .49 has been swung on its center out of locking engagement with the plate 54, andthe crank arm 46 is fully engaged with the contact surface 51 of said latch, further downward movement of said crankarm will be transmitted from the latch 49 to the. upper side of the pivot 50 and thence to the link 38, with the result that said link will be swung downward. Downward movement of the link will be transmitted to the curved arm 24 and thence to the frame or bracket member 22 and type bar segmentS, which together with the type bars (Sand their rest 11, will move down ward until arrested by contact of the stop 58 with the stationary stop surface 20 as shown in Fig. 6. The downward or case shifting movement of the type bars will be participated in by the bell cranks l7 and the forward portions of the links 18. These links will swingabout their pivotal connections with the levers 19 as: centers, which levers 19 being mounted on the stationary their pivotalpoint of connection with the associate lever 19, the links inclining forward and upward from such line. As a re sult of the case shifting movement the links willbeswungdownward to a corresponding position-below said line. When the shift key is released the type bar system and its support will be re-shifted back to normal position, beingarrested by engagement of the screw stop 57 withthe under surface of the thickened or stop portion of the ledge 20. When the type bar system and its support are arrested by contact of the stops as described, the link 38 will also be arrested, but upward movement of the crank arm 46 will continue, thus releasing the latch 49 which will be free to swing forward under the pull of its spring 52 until it automati oally reengages'with the plate 54, as shown in Fig. l.- In this position it will. be understood that the shiftable type bar mechanism and itsv support will be held positively against movement or vibration. The latch 49, by reason of the engagement of its hook I 53 with the plate 54, will normally lock the shiftable frame or member against downward movement, while the stop screw '57 will prevent its upward movement. In other words, the latch 49 and the stop device 57 co-operate with opposite sides of the stawhich. will remain stationary until the crank *tionary stop to the shift member: or 130,

frame positively against vibration, which might result in the blurring of the type imprint or in causing it to print out of alignment.

In Figs. 11-15 is illustrated a modified construction of shift key locking mecha' inism, which instead of having one of the co-operative locking elements mounted on the side frame of the machine, provides in stead amounting on the detachable sub frame 20, the advantage being that when the frame part or sub-frame is detached, and with it the shift key levers and asso ciate devices that are mounted on it, the co-operative locking element will likewise be detached. in other words, a unit construction is provided. Referring first to Figs. 11 and 12, it will be observed that the comb plate 77 is secured by screws 99 to the forward ends of horizontally disposed rods 100, said rods at their rear ends being threaded into the detachable frame 20. The comb or cover plate 7 8 which fits over the comb plate 77 is detachably secured in place by screws 101. The screws 99 are accessible through holes 78 in the cover plate 78. Fixed to the rear face of the comb plate 77 near its lefthand end is an angular bracket member 102 shown detached in Fig. 15. This member comprises a slotted portion 103 and an angu' larly disposed rearwardly extending portion 104. The portion 103 is provided with elongated slots 105 affording passage for screws 106 that secure the bracket to the comb plate 77. interposed between the portion 103 and the screws is a rectangular washer 107. The portion 104- of the bracket is provided with a stop lip 108 and a perforation109 which accommodates a shoul dered and headed rivet or pivot pin 110. This pivot pin provides a pivotal support for a. co-operating dete-nt or latching device 111 terminating at its lower end in an inwardly turned lip 112, which is adapted to co-operate with the hooked end portion or latch 80 of the shift lock lever 80. A coiled spring 113 having one end connected to the device 111 and the other end anchored to the bracket 102, tends constantly to swing the device 111 forward about its pivot and maintains the front edge of the lip 112 normally engaged with the rear face of the hook portion 80 The construction is such that. when the locking key 83 is depressed from normal position the portion 80 will act. against the device 111, swinging it rear wardly against its spring 113 until the face 80 has swung downward far enough to clear the latch, which will then snap forward to the Fig. 12 position, interlocking the parts The forward swing of the device 111 under the pull of its spring 113 is limited by the stop 108, the construction and arrangement being such that when it is desired to release the parts a depression of the key 79 will.

allow the hook 80 to swing clear of the lip 112, said hook being thereafter drawn forward to clear said lip by the spring 841-.

Aside from the case shifting mechanism. such illustrated parts as are novel are not claimed herein as they constitute no part of the present invention.

Various changes besides those described may be made without departing from the invention.

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

1. In a typewriting machine, the combina tion of a platen element, a type bar element, a stationary part, a shift key, and a train of devices between said key and one of said elements for shifting the same, said devices including a lock co-operating with said stationarypart to normally prevent shifting movementof the shiftable element, said key first unlocking said look while the shiftable element remains motionless and said lock thereafter transmitting case shifting DIOYG. ments from said key to said shiftable elcment.

2. In a typewriting machine, the combination of a platen, a type bar segment, a lock normally locking said segment against a fixed part of the machine against shifting movement, a shift key, and connections from said shift key to said segment and also to said lock, the operation of said shift key being effective first to unlock said lock with out moving said segment and thereafter to actuate said lock itself to shift said segment.

3. In a typewriting machine, the combination of an element shiftable to change case, devices for supporting and guiding said element including a link, a spring latch mounted on said link and normally preventing case shifting movement, and key operated means effective first to release said latch and thereafter through said latch to actuate said link to cause a shifting of said element.

st. In case shifting mechanism for typewriting machines, the combination of a shiftable element, a shift key, and a train of case shifting devices controlled by said key and. including a motion-transmitting latch. mounted independently of said key and which normally operates to lock the shiftable element against shifting movement, it being necessary first to unlock said latch in order to position it for motion t ans-inissio the shiftable element remaining motionless during such unlocking.

5. In case shifting mechanism for type writing machines, the combination of a shiftable element, means for shifting said element including a shift key lever, and means including devices in said first recited means for normally holding said element positively in fixed relationship with station ary part-s ofthe machine, said holding means being mounted independently of the shift key lever and being rendered ineffective independently ofand prior to the beginning of the case shifting movement.

6. In case shifting mechanism'for typewriting machines, the combination of a platen, a segment, a shift key lever, and means operated by said lever for shifting said segment, said means including essential parts which also positively prevent vibration of said segment during printing operations, which parts are renderedineffective as vibration. preventives independently of and prior to the beginning of the case shifting movement of said segment.

7. In a typewriting machine, the combinalion of a platen, a shiftable type bar segment, a lock normally controlling said seg merit, a shift key, and. a single train of connections between said shift key and said segment and also with said lock, said shift key being i'nounted independently of said lock and the operation of said shift key being effective first to unlock said lock prior to the beginning of shifting movement onsaid segment and afterwards to shift said segment.

8. In case shifting mechanism for typewriting machines, the combination of a shiftable segment, two stops thereon, a horizontal ledge on the frame of the machine provided with top and bottom contact surfaces for normal co-operation with the stops on the segment whereby the stops and the ledge are maintained in clamped relationship thus holding the segment against vibration, a shift key, andconnections to one of said stops for moving it to release the segment. l

9. In case shifting mechanism for typewriting machines, the combination of a shif able element, a frame stop and devices on said shiftable element co-operating with said frame stop at opposite sides thereof to prevent mmement of said element. I

10, In case shifting mechanism for typewriting machines, the combination of a shiftable element, a frame stop and devices on said shiftable element co-operating with said frame stop at opposite sides thereof to prevent movement of said element, one of said devices being movable to permit said element to be shifted. i

1.1. In a typewriting niiachine, the combination of a platen element, a type bar ele ment, means for relatively shifting said ele ments, a lock for normally preventing said relative shifting movement, a- ,key, and a single train of connections operative first to release said lock and afterwards to effect said relative shift, I

12. In a typewriting machine, the combi nation of a platen,a shiftable type bar segment, a lock normallycontrolling said segment, a shift key, and a single train of connections between said shift key and said se ment and also with said lock, the operation of said shift key being effective first to unlock said lock and afterwards to shift said segment.

13. In case shifting mechanism for typewriting machines, the combination of a shiftable element, stops, a spring maintaining said stops in contactive engagement, a spring latch normally! preventing disengagement of said stops, and a train of devices for shifting said shiftable element, said latch being-a necessary element in said train.

14. In case shifting mechanism for typewriting machines, the combination of a shiftable element, stops, a spring maintaining said stops in contactive engagement, a

spring latch normally preventing disen gagement of said stops, a key effective to release said latch and operate the case shift, and a train of devices for shifting said shiftable element, said latch being, a necessary element in said train.

15. In a typewriting machine, the combination of an element shiftable to change case, supporting and guiding devices for said element comprising a link, a spring latch mounted on said link and normally preventing case shifting movement, and a key operated means effective to release said latch and actuate said link to effect the case shift.

16. In a typewriting machine, the combination of an element shiftable to change. case, supportingand guiding devices for' said element comprising a link, a latch pivoted on said link and normally preventing case shifting movement, a spring for said latch, a crank arm coaxial with said link, and key operated means to swing said crank arm to release said latch and through said latch to actuate said link to effect the case shifting movement. I

17. In a typewriting machine, the combi nation of an element shiftable to change case, atrain of key actuated case shifting devices, a latch pivotally mounted on one of the parts in said train, and a stationary part with which said latch normally engages.

18. In a typewriting machine, the combination of an element shiftable to change case, a train of key actuated case shifting devices, a latch pivotally mounted on one of the parts in said train, and a stationary part with which said'latch normally engages, said train also comprising a partfor disengaging said latch from said stationary part.

19. In a typewriting machine, the coinbination of an element shiftable to change case, a train of key! actuated case shifting devices, a latch pivotally mounted on one of the parts in said train, and a plate adjustably mounted on a stationary part with which plate said latch normally engages.

20. In a typewriting machine, the combination of an element shiftable to change ra se, a train of key actuated case shifting devices, a. latch pivotally mounted on one of the parts in said train, a T-shaped latch plate with which said latch normally engages, a support for said latch plate, screws threaded into said support for securing said latch plate thereto, and a screw oppositely threaded into said support and abutting against said latch plate for vary ing the location of said latch plate.

21. In a typewriting machine, the combination of an element shiftable to change case, supporting and guiding devices for said element comprising a link, a vertically arranged latch pivoted on said link and provided at its upper end with a hook, a stationary latch plate with which said hook normally engages, a spring connected to the tail of said latch and constantly tending to maintain said hook engaged with said plate, and a key actuated crank arm effective on said latch to overcome said spring and disengage said hook from said latch, said crank arm being thereafter effective through said latch on said link to swing the same to shift said shiftable element.

2-2. In a typewriting machine, the combination of an element shiftable to change case, case shifting devices comprising a ho r izontally disposed link or arm, an upright latch pivoted on said link and provided at its upper end with a hook and also provided above its pivot with a contact face, a stationary plate with which said hook engages, a spring connected to the tail of said latch for maintaining such engagement, and a crank arm operative on the contact face of said latch to turn it on its pivot and thereafter to exert pressure against said pivot to move said link.

:3. In a typewriting machine, the. combination of a shiftable element, a supporting device between said element and the frame of the machine, a shift key, connections to said element from said shift key, two parallel spring arms connected to said element and both adapted to be flexed when. said element is shifted in one direction, said spring arms restoring said element to normal position after the shift, and a detachable plate common to both springs and provided. with devices for preventing displacement of said springs.

In a typewriting machine, the com bination of a shiftable element, a shift key, connections to said element from said shift key, and two U-shaped springs having a common support and parallel arms adapted to be flexed when said shiftable element is shifted, the cross portion of each spring be ing subjected to torsion as a result of the shifting movement,

25'. In a typewriting machine, the combination of a shiftable element, a shift key, connections to said element from said shift key, two U-shaped springs having parallel arms adapted to be flexed when said shiftable elements is shifted, the cross portion of each spring being subjected to torsion a result of the shifting movement, and a common support for said springs comprising a plate secured by a screw to the frame of the machine and provided with projections which assist to prevent displace ment of said U-shaped springs,

26. In a typewriting machine, the combination of a shiftable type bar segment, a bracket on which said segment is mounted, said bracket being provided with a depending arm, U-shaped springs having arms arranged in parallelism at opposite sides of said depending arm and co-operating with projections on said depending arm, and means for shifting said segment and bracket, said parallel spring arms being subjected to flexur'e during the shift and the cross portions of said iJ-shaped springs being subjected to torsion.

27. In a typewriting machine, the combination of a shiftable element, a rock shaft, a pair of crank arms connected to said element and fixed to opposite end portions of said rock shaft,- a second rock shaft connected to said segment, a shift key connected to said second rock shaft, stationary bearings for said'second rock shaft. and disp'laceable bushings between said second rock shaft and said bearings.

28. In atypewriting machine, the combination of a shiftable' element, a rock shaft, a pair of crank arms connected to said element and fixed to opposite end portions of said rock shaft, a second rock shaft connected to said segment, a shift key connected to said second rock shaft, open mouthed bearings for said rock shaft, bushings detachably fixed to said second rock shaft and engaging in said open mouthed bearings, the bushings being of greater diameter than the width of the mouths of said bearings and the second rock shaft being of lesser diameter than the mouths of said bearings.

29. In a typewriting machine, the combination of an element shiftable to change case, controlling devices for said element including a shaft, bearing lugs for said shaft in the base of the machine, each bearing lug being circularly perforated, the perforations being provided with mouths less in width than the diameter of the perforations, and bushings slidably mounted on said shaft, said bushings having a bearing fit in said perforations.

36. In a typewriting machine, the combination of an element shiftable to change case, controlling devices for said element including a shaft, bearing lugs in the base of the machine for said shaft, each bearing lug being circularly perforated, the perforations being provided. with-moutlis less in width than the diameter of the "perform ti'ons, and l3USl1l11, S surrounding said shaft and bearing in the perforations ;in said ,lu 's' saldflbnshin s haviiw collar JQFlllQllS tj 1:: 7 0

whlc'h receive set screws whereby the bush are detachably fixed to saidshatt;

"In "a typewritihp; machine, the combushings being of greater" diameter than said 'rnonths so that normally they prevent withdrawal o'f'rsai'd shaft-from said lugs,

the shaft,lioweverybeing free'to be with drawn sidewiseftherethron'gh when the bushings are freed and slid along the shaft out (if the. perforations] 32. In a typewriting machine', combination or" a shiftabl'e elein'e'nt, arock shaft,

a. pair of crank'arms fixed to opposite end to said second pair of crank-arms;

portions of said rock shaft landfpivotally connected" to, said shiftable element, a sec,- ond'rock shaftparallel to the first, a crank ar'm'iiX'ed centrally to the second rock shaft, arm.

connections between said central crank and sardpsh ftable element, a second'fpa r of crank arms fixed to opposite endport ons of said second rock shaft,iand key.

'33. In ajtypewriting machine, the combi-' nation re shiftable;.segment, two rock shafts, a pair of cra'nkjarm's fixedtoopposite end portions of one otfsaid rock shaftsand pivotally connected to said "shiftable segment, a crank arm tiked centrally to the other of said rockshafts, connections between said central crank arm andsaid shiftable segment, a second pairof crank arms fixed to opposite end portions of said last" named rock shaft, key connections tosaid second pair of crank arms, and stops on the frame of the machine co-operative with said shiftable segment to preventlateral' vibration thereof.

34. In a typewriting machine, the combi nation of ashiftable elementcomprising an upright type bar segment, an upright 'bracketmcmber to which said segment is detachably secured, saidbracket being provided-with a central arm extending downward and rearward, and a type bar rest sup-v ported from said bracket member; stop devices mounted on said arm; stationary stop devices with which said first recited stop devices co-operate; a shift key; and connections to said element.

35. In a typewriting machin the combielement, a

connect-ions a shift key.

mass a a shiftable' element, two parallel rock'shatts, two crank armsfixedt'o opp'oslt'e end portions of one-'of-sald rockshafts and' pivota'llyi connected to said shift-able other 0 tween i central crank arm and saidshiftable e'le'ment,.a secondpair of crank arins fixed to opposite endpv tionsoffsaid last named rock shaft, key "connections to said second pair Sofcrank arms, and'restoring spring mechanism for said shiftable element, sald shiftableelement comprising an upright segment, an I -.u 3 rig'ht..bracket member to .which said segment isudet-achablyr secured, said fbracket'r being provided 1 with a central, downwardly extending Jarm with which :said spr ng 'mecharnsrn Jed-operates,

andv'ai typebarfire'st ,supportedk from said bracket'member. 36. In a typewriting merit, a crank; armiihfixed centrally-- tol the other I of saidnrock ishaits; connections be? crank arm fixedcentrally: to the sai d rock shafts," connections be H I machineg'the c0mb-i-' nation oi a shi'ftable element,- two parallel rock? shafts, two crank arms fixed to o-p'posite end portions of one. ofi'said rock shafts and pivotally connected "to said shiftableeletween said'central cranl r ar m andfsaid shiit' I able element, a second pair-of crank arms I fixed to opposite; end portions ofsaidizla'st named rock-shaft, and :key connectionsjgto said secor'id pair o t crank arms, -'each' of; said key? connections having" a. lost "motion roonnection with its. associate crank arm. -v l s 87; 'Infa typewriting machine ,Lthet comb1- nationof a shittable element, two parallel rock shafts',*tw'o crank arms fixedto op'posit'e end portions oi; one of said rock shaftsfand 'plvotally T3 connected to said: shiftablel element, a-fcrank arm 'fixedi centrally to the other of I said rock eshafts," connections Ebetween said-acentral' cranlr farm )and said arms fixed to opposite 'end portions of said last named rock shaft, and key connections" to said secondpalr of crank arms, said key connections comprising links "having lost motion connect on with their associate crank arms nd levers each pivotally connected" with one of said links and iprovidedewith 38. In a typewriting machine, the, comblnation of a shittable element, two shift key levers, connections between each of said 1 levers and said shiftable element, and key locking devices for one of said shift levers effective to hold it in operative position, said key locking devices comprising a locking lever pivoted on said associate shift lever;

and provided with a hook, and. a spring mounted detent device cooperative with.

said hook.

39.'I11 a typewriting machine, the combinationof a shiftable element, two shift key levers, connections between each of said levers and said shiftable element, and key locking devices associated with one or saidv shift levers and efiective tohold it in operative position, said-key locking ClGVlCGSCOID- prising a locking lever-pivoted on the asso ciate shift lever, a stop on one end of said locking lever and a 'key on the opposite end -of said locking lever, aspring connecting said locking leverj'witlrthe associate shift lever, a hook on said locking lever, and a spring pressed engaging-device for engaging said hook. i 40. In a typewriting machine, the combination of a .shiftable element, a shift key lever, connections between an arm of said lever and said shiftable element, a comb plate detachably mounted on the frame of the machineand" provided with aguide slot for said shift lever,"a locking lever pivoted on the shift lever and providedwith a hook,

a stop -and a key, a spring connecting said locking lBVBIWVltllill'lG associate shift lever,

anda spring pressed detent for said hook,

.said 'detent being mounted on said comb plate. a a I J a 41.111 a typewriting machine, the com- *bination ofan element shiftable tov change case, Slllfl'f key levers, connections between said. levers and said element,.a sub-frame Idetachably mounted on the main frame of the machine on which said shift levers are pivoted, a guide comb with which'said levers co-operate, said guide comb being detachably secured to'said sub-framakey locking devices associated" with" one of said shift levers, said key locking'd'evices comprising a locking lever pivoted to the associate shift lever and a detent device co-operative with said'locking lever, said detent device being mounted on said'oomb plate.

42. In a typewriting machine, the combination of an element shiftable to change case, shiftkey levers, connections betwee'n said levers and said element, a sub-frame detachably mounted on the main frame of the machine,-said shift levers being vpivoted .on said'sub-frame, a. guide comb with which said levers co-operate, arms secured tosaid sub-frame and projecting forward therefrom, screws for attaching said guide comb to said ar1ns, a locking lever pivoted to one of said shift levers and provided with a hook, a spring pressed detent with which said hook co-operates, and av bracket on which said detent is pivoted, said bracket being detachably secured to said guide comb. v o

43. In a typewriting machine, the combination of an element shiftable to change case, shift key levers, connections between said levers and said element, afsubdrame detachably mounted .on the main frame-,rsaid shift levers beingpivoted on said sub-frame,

a comb plate by which said'levers are guided, said comb plate being detachablysecured .to said sub-frame, key locking devices comprising a locking "lever pivoted to one of said shift levers, an angular bracket, screws for adjustablysecuring said bracket to said comb plate, a depending arm pivoted to said bracket, a spring anchored to said bracket and connected to said arm,f a stop .on said bracket against which saidarm is normally maintained by said spring, and an engaging device upon said arm adapted to co-operate with i said locking lever. i

Signed at the borough of Manhattan, city of New York, in-ythe county of New York

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501605A (en) * 1945-01-25 1950-03-21 Woodstock Typewriter Co Case shift mechanism for typewriting machines
US2631713A (en) * 1951-06-09 1953-03-17 L C Smith & Corona Typewriters Case shift mechanism for typewriting machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2501605A (en) * 1945-01-25 1950-03-21 Woodstock Typewriter Co Case shift mechanism for typewriting machines
US2631713A (en) * 1951-06-09 1953-03-17 L C Smith & Corona Typewriters Case shift mechanism for typewriting machines

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