US1115068A - Type-writer. - Google Patents

Description

DE WITT O. HARRIS.

TYPE WRITER.

APPLICATION FILED MAR.2(),1918.

1,1 1 5,068, Patented Oct. 27, 1914.

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TYPE WRITER.

APPLICATION FILED MAR. 20

Patented Oct. 27, 1914.

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TYPE WRITER.

APPLICATION FILED MARJID, 1913- Patented Oct. 27,1914.

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UNITED STATES PlENT omen.-

DE WITT C. HARRIS, 0F FOND DU LAC, WISCONSIN, ASSIGNOB, BY MESNE ASSIGN- v MENTS, TO HARRIS TYPEWRITER MANUFACTURING COMPANY, OF FOND DU LAC, WISCONSIN, A CORPORATION OF WISCONSIN.

' TYPE-WRITER.

Specification of Letters Patent.

Patented Oct. 27, 1914.

Original application filed April 15, 1912, Serial No. 690,756. Divided and this application filed March 20,

To all whom it may concern Be it known that I. DE Wrr'r C. HARRIS, a citizen of the United States, residing at Fond du Lac, in the county of Fond du Lac and State of Wisconsin, have invented certain new and useful Improvements in Type- Writers, of which the following is a spec1-' ing instrumentalities and moving the platen with relation thereto, or by mounting the platen in a stationary manner and moving the said printing instrumentalities with relation to the platen. However, I prefer, and have illustrated in the attached drawings, the construction in which the platen is stationary and the printing means movable.

Although my invention may be used in machines having various styles of printing devices, such as type wheel, segment or type bar machines, the preferred construction is herein illustrated in which the printing devices consist of a plurality of independently pivoted type bars mounted upon a common support. Each of these type bars is provided with three types which are brought into printing position at different times by the movement of the said type bar support.

I have herein shown my. invention as applied to a typewriter of the so-called visible and front-strike class, the type bar support being movable in a vertical direction, but obviously the invention is also applicable to other styles of machines.

- This application is a division of my prior application, Serial No. 690,756, filed April 15, 1912.

In the accompanying drawings, Figure 1 is a vertical front to rear section through a typewriting machine embodying the features of my invention. Fig. 2 1s a fragmental vertical sectional view taken on line 2 2 of Fig.'1, and illustrating the movable type bar segment. Fig. 3 is a vertical sectional view illustrating the guides for said type bar Serial No. 755,582.

segment. Fig.4 is a horizontal sectional detail-view of one of said guides. Fis. 5, 6

and 7 are views in a series illustrating-the case shift mechanism in its three different operative positions. .Fig. 8 is afragmental vertical sectional ,view illustrating a portion of said mechanism. Figs. 9 and 10 are se'ctional detail views illustrating a portion of said mechanism in two different positions.

The machine to which I have herein shown my improvements as applied comprises a suitable framework consisting of a lower or base portion 10 and an. upper or deck portion 11.

Since the present invention does not relate to the general mechanism of the machine, I will herein describe only such portions of said mechanism as'assist in understanding this invention, referenceiboing had to my former application above identified for a complete understanding of themachine.

The key lever mechanism for the type bars comprises a series'of key levers 12, only one of which is shown, each of said levers being pivoted on a shaft 13 and connected by means of a link 14 with one arm of a bell crank lever 15. which lever is pivoted upon a shaft 16. The vertical arm of said bell crank lever is connected by a link 17 with a bars 19. The platen is indicated at 20.

The type bar segment 21, which is bestshown in Fig. 2, is mounted in the frame of the machine for vertical movement. Said. segment has three operative positions, of which the middle position is normal, and means, to be later described,is provided for shifting the segment in opposite directions from said normal position. The series of type bars 19 is pivoted on the arcuate' portion of the segment. Said segment is mounted in a frame 22 which has in the present instance three. arm's23 at lower portion resting upon and suitably secured to lugs 24 and 25 extending inwardly from the base 10 of the machine. The frame 22 comprises two vertical side portions having-grooved guide bars 26 mounted thereon. P. eferably, these guide bars are mounted on the ends of screws 27 (Fig. 4) extending through slots 28 in the 'side portions of the frame 22. Said guides are adjustable laterally by screws 29 threaded in the frame andoverlying said guides, the latter screws being locked by set screws 30. The type bar seg ment 21 has two sides 32 having grooves therein complementing the grooves in the guides 26 to form races in which anti-friction balls 33 are mounted: Herein l have shown two halls in each of these races, said balls being spaced ap by means of a spacer plate-311;. Projewtinp; laterally from each of the sides of the segment a stud 35 having an anti-frictionroller 36 mounted thereon, which stud and roller are adapted to be actuated upon by the shifting mechanism to belater described. Stops 37 are carried upon lugs 38 in the upper ends of the sides of theframe 22 to limit the upward shifting",movement of the segment. stops 39 are mounted beneath the sides 32 of the segment to determine its downward shifting movement, as will be later explained, said stops 39 being in the present instance mounted upon "the lugs 25 on the main f "ame. Stops l0. (Figs. to T). which may also be mounted in said lugs are adapted to befen'gaged by portions carried by the shifting mechanism to determine the normal position of the segment. All of these stops maybe of any suitable form, such as screws seated in their supports and carry inn at their ends buffer plates a of suitable material, such as fiber or the like. Coiled springs l1, secured to the sides 32 of the t pe bar segment and to the frame 22, countel-balance the weight of said segment to render the operation thereof easier.

As he reinbefore. stated, each of the type bars 19 carries three characters. The mechanism is so arranged that the middle row of types on said bars is used in ordinarywriting, the upper and lower (or inner and outer) rows comprising capital letters, fig ures, or any other desired characters accord ing to the use to which the machine is to be put. In using; the upper and lower rows of types on the type bar, the type bar segment is shifted in opposite directions. said segment' normally occupying, its middle position. Themechanism for shifting said segment comprises a pair of arms ll fixed upon the ends of a horizontal rock shaft so which is mounted in the lower frame. ends of said arms is rotatably mounted a rock-shaft 46 (Figs. 8 to 10) and upon each end of this latter shaft is'fixed an arm 47 having a slotted cam 48 at its upper end in which the roller 36 carried by the movable type bar segment lies. said arms 47 when intheir normal position thus form rigid links connecting the outer end of the arms as with the type bar segments. The arms 4.4 are swung to raise said type bar segment by means of either one of two shift levers 4-9 (only one being here shown) located at opposits sides of the machine, each of said levers being pivoted near its rear end on one end of the rock shaft l5 and havingan Similar In the rear in rapes inwardly extending finger '50 which underlies the adjacent arm 44. Since both of the arms i i are fixed on the rock shaft 4:5,. when the outer end of either of the levers 49 is depressed, the arms will be swung upwardly and the type bar segmentwill be raised, the upward movement thereof being limited by the stop 37.. =l n the return of the segment after an upward shift thereof, 1a shoe 51 carried by each of the arms llwill abut against the stops to determine the normal position of the segment. Each of.the shift levers it) is held in its normal position by a coiled spring, 52 attached at its upper end to the rear end of the lever and at its lower end to a suitable bracket The type bar segment arms l7 forwardl which will cause the slotted cams 4-8 carried by the upper ends of said arms to draw the rollers 011 the segment downwardly. lar means at opposite sides of the machines,

each means comprising a bell cranklevei" 55, the arm-5,5 of which lies alongside the arm i? and has a finger 56 extending into a slot 57 in the arm 4.7. A flange 58 on said linger lies at the side of said arm opposite to said bell crank' lever. pivoted on a log 59 on the base lO' of the machine, the,pivot 60 being in register with the'roc k shaft l6 when the latter is in its loweror normal position. A shift lever (ll-pivoted between its ends upon-the rock shaft '45 is arranged to engage-at its rear en'dfa roller 62 carried by thearm'55 of the bell crank lever 55 for rocking said lever. A spring 63 attached to ;the arm 55 and anchored to the base of the machine normally holds the'bell crank 55 and the arm 4%? in position to maintain the type bar segment in its normal position. The shift lever 61 is held in its normal position by a coiled spring (Si-attached to said lever and to the bracket Both of the, arms t? being fixed on the rock shaft L6, when either of the shift levers 61 at opposite sides of the machine is depressed, both arms 47 will be swung to lower the type bar segment untilit abuts against the stops 39.

When the type bar segment has been raised through the medium of the shift lever 49,- an upright lug 65 on the rear end of the arm ll is carriedin front of the finger 56 upon the bell crank 55. Therefore, it will be impossible to swing said bell crank by depressing the segmentdowering lever 61.

is lowered by swinging the cam- Said arms are swung. by simi- The bell crank lever Likewise, when said segment lowering lever has been depressed the segment-raising lever 49 cannot be depressed to raise the segment because the finger 56 on the bell cranli has been moved above the 1ug65 on the arm 44:.

Thus only one of the segment-moving means can be operated at a time. The lug.65 also assists in preventing upward bouncing of the segment when shifted downwardly to its lowermost position by reason of the overlying relation of the fingers 56 to said lug Said lug also prevents upward movement of the segment through momentum when the latter is returning from its lowermost to its middle or normal position, be cause the finger 56 continues to overlie the lug 65 until the end of movement of the seg ment. The cams l5 by reason of their shape also assist in preventing movement of the segment through momentum or from bouncing.

lVhile I have herein shown that embodiment oiany invention which is preferred, I would have ,it understood that I do not limit myself to the exact structure disclosed, but aim to cover in the appended claims all modifications which fall within the scope of the invention.

I claim as my invention:

1. In a typewriting machine,-the combi nation with a platen and printing instrumentalities, of case shift mechanism for effecting a relative shifting movement be tween said platen and said printing instrumentalities to any one of three positions, said case shiftmechanism including a movable device operating to shift the movable element to one position, and means connecting said device to said movable element, said means being movable with the movable element to the mentioned-shift position and be ing operable with relation to said movable element for shifting the latter to another position.

2. In a typewriting machine, the combination with platen and printing instrumentalities, of case shift mechanism for effecting a relative shifting movement between said platen and said printing instrumentalities to any one of three positions, said case shift mechanism including two shift keys, and means operatively connecting one of said keys to the movable element for shifting the latter to one position, said means including a device arranged to shift with the movable element to the mentioned shift position and being operable by the other key with relation to the movable element for shifting said movable element to another position.

3. In a typewriting machine, the combination of .printing instrumentalities and a platen, one of which is shiftable relatively to the other to any one of three positions,-

means for shifting said shiftable element including a pivoted arm, and a cam member forming a connection between said arm and said shiftable element, said cam member be ing bodily shiftable with said arm in one shifting movement and being movable with relation to said arm in another shifting movement.

4. In a typewriting machine, the combination of printing instrumentalities and a platen, one of which elements is shiftable relatively to the other to any one of three positions, of means for shifting said shiftable element incliu'ling a pivoted arm, and a' connection between said shiftable element and said arm at a point spaced from the pivot of the latter, whereby swinging of said arm will bodily reciprocate said connection and sliift said shifta'ble element to one position, said connection including a,

cam arranged to be operated to shift said shift-able element to another position.

In a typewriting machine, the combination with a platen and printing instrumentalities, one of which elements is shiftable with relation to the other to any one of three positions, of a cam member operatively' associated with the shiftable element, means for bodily moving said cam member to place said shiftable element in one of its shift positions, and means for rocking said cam member to place said shiftable element in another of its shift positions. 6. In a 'typewriting machine, the combination with a platen and printing instrumentalities, one of which elements is shiftable with relation to the other to any one of three positions, the shiftable clement carrying a projection, of a cam mounted for traveling movement and for rocking movement and having a cam slot in which said projection lies, means for causing said camto travel to carry the shiftable element to one position, and means for rocking said cam to change the position of said projection in said cam slot and thereby move said shiftablc element to anothershift position.

7. In a typewriting machine, the combination of a platen and printing instrumentalities, one of which elements is shift-able relatively to the other to any one of three positions, of means for shifting the shiftablc element including a movable device, and means forming an operative connection between said device and said shiftable element and arranged to be bodily reciprocated by said movable device for moving the shift able element in one direction from its normal position, said means including a cam ope able to move said shiftable element in the opposite direction from its normal position.

8. In a typewriter, in combination, a vertically slidable type bar segment, and means for shifting said segment comprising a pivoted arm, a connection between said arm and said segment, a shift lever pivoted between its ends, one end of said shift lever having a key thereon and the other end having a portion to underlie and engage said arm, and

swing the latter upwardly to shift said type bar segment.

9. In a typewriter, the combination of a framework, a type bar support mounted therein for vertical movement'and hav ng a nmrable type-bar support, apivoted arm, a

cam member connecting the free endof said arm with said type-bar support, and means for'swingingsaid arm and for operating said cam member'with relation to said arm. 11. In a typewriter in combination, a movable type bar support, a pivoted element for moving said support in one direction, and ,a fink operatively connecting said element with said support, said link having means which is operable to move said support in theopposite direction.

12. In a typewriter, in combination, a movable type bar support, a shift lever and means connecting said shift. lever to said support and being bodily reciprocable for moving the latter 'in one direction, said ineans including a pivoted cam operable to move said support in the opposite direction.

13. In a typewriter in combination, a movable type bar support, a pivoted arm, an arm pivoted upon the free end of the first mentioned arm, the second mentioned arm having a cam, a stud on said type bar sup- 'port cooperating with said cam, means for swinging the, first mentioned. arm to move said type bar support in one direction through the medium of the second mentioned arm, and'means' for swinging the second me'ntionedarm to operate said cam and move said support in the opposite direction.

141. In a typewriter in combination, a movable type bar support, a pivoted arm, an arm pivoted on the free end of the first mentioned arm, a stud on said type bar sup:

ort e'n a 'in the second mentioned arm I the latter normally foaning a rigid link connecting the first mentionedarm with the type bar support, a shift lever arranged to swing the first mentioned arm to move said type'bar support in one direction through the medium of the second mentioned arm, a cam on said second mentioned arm arranged to act upon said stud for moving said type bar support in the opposite direction, and a second shift lever arranged to swing said second mentioned arm to operate said cam.

, 15. In a typewriter in combination, a ver tically movable type bar support, a rock shaft, two arms fixed on the opposite ends of said shaft, an 'arm connecting the free end of each of the first mentioned arms with said ape har support, the second mentione... am having means for moving said tioned arms to operate said supportdowen,

ing means. I

' 1,6. In a typewriter in combination, a vertically movable type barsupport, a pivoted arm, an arm pivoted to the freeend of the first mentioned arm and having a slotted cam at its free end a roller stud mounted on said support and lying n thesiot in said cam, a shift lever arranged to swing the first mentioned arm, and a second shift lever is. ranged to swing the second mentioned arm.

17. In a typewriter in combination, a vertically movable type bar support; means forshifting said support upwardly comprising a pivoted arm and. a-link connecting said arm to said' support; means including a lever arranged to swing said-link for shift ing said support downwardly; and interlocking means .on said arm and said lever arranged'to prevent bouncing of the type bar support or movement of said" support through. momentum. v

18. in a typewriter, 111 combination, a verti'cally shiftabletype-bar support, a. hori Zontal rockshaft, a pair'of arms fixed on said shaft, a pair of-cam members-pivoted at their lower ends to-the free ends of said arms, and operatively associated at their upper ends with said ,type-bar support, and means for rocking saidshaft and for swing ing' said cam members. l v

19. In typewriter, in combination, a vertically shiftable type-bar support having outwardly projecting studs thereon, a horizontal rock shaft, a pair of arms fixed on opposite endsof said shaft, a pair of ram members pivoted at their lower ends to the free endsof said arms the upper ends of said members having cam slots in' which said projections lie, :1 shift-key arranged to rock said shaft, and a'second shi'i ey arranged to rock saidcam members.

20. In a typewriter, in combination, a

frame, a type-bar support mounted therein for vertical movement and having three operative positions of which the middle is the normal position, stationary stops in said frame for determining the upper and lower limits of movement of said type-bar support, means for shifting said support including a key-operable part mounted for up and down movement, a device connectsaid part to said support for communi eating motion to the latter when said part is raised. stop means against which said part is arran ged to abut in its downward movement to determine he normal position of said support, and key-operable means arranged to actuate said device to shift said tr pe-bar support downwardly with relation 21'. In a typewriter, the combination of a platen and printing means shiftable with relation to each other, a pair of shift key levers at opposite sides of the machine, means mounted for movement by either of said key levers in the same direction as the gage means when returning from said uppermost 'position,thelatter stop means determining Shiftable element, means connecting the sec- 0nd mentioned means with the shiftable element for transmitting movement to the latter in one direction, and another pair of shift key levers for operating said connecting means independently of the second mentioned means whereby to move the shiftable'element in the opposite direction with relation to the second mentioned means,

22. In a typewriter, in combination, a frame, a type-bar support mounted therein forvertical movement and having three operative positions of which the middle is the normal position, stops mounted in said frame for determining the limit of motion of said support in opposite directions, shifting means for raising said support from its normal to its uppermost position, stationary'st'opm ans mounted on the frame and liy a portion of said shifting the normal position of said type-bar support,and means for moving said support downwardly with relation to the mentioned portion of said shifting means to carry the type bar'. support into its lowermost poa; "2 8. ty ewriter, in combination, a frame, a. typear support mounted therein for vertical movement and having three operative positions of which the middle is the normal position, shifting means including a vertically movable part, and a cam member connecting said part to the type-bar sup- 'port, a stop in the upper portion of the frame to determine the upward movement .of said part and said cam member, a second stop determining the downward movement of said part into normal position, and a third stop to determine the downward movement of the type-bar support when said cam member is operated.

24. In a typewriter, in combination, a

frame, a type support mounted-therein forv vertical movement and having a pair of 0utpendently pivoted key levers, and means connecting one of said ltey levers with sa d type support for shifting said support 1n n a typewriter, in combination, a vertically movable-type support, two 1ndeone direction from its normal position, said. means including a device independently movable with respect to said support and the remainder of said means, said device being individually operable by the other key lever for shifting said support in the opposite direction from its normal position.

.36. In a typewriting machine, the combination with a platen and printing instrumentalities, one of which elements is shiftable with relation to the other to any one of three position, of case-shift mechanism including a movable device, and means act ing as a link connection between said device and said shiftable element in one shifting movement, and acting as cam means to actuate said shiftable element in another shifting movement.

27. In a typewriting machine, the combination with a platen and printing instruinentalities, one of which elements is shiftable with relation to the other to any one of three positions, of case-shift mechanism including a movable device and a member connecting said device to said shiftable element, saic member actin as a link in the upward movement of said element, and being operable as a cam to move said element downwardly.

28. In a typewriter, in' combination, a vertically shiftable type-bar support, a movable shifting device, and means connecting said device to said support and act-- ing at times as a link connection and at other times as a su ort-shifting means.

29. In a typewritlng machine, the combi-- nation with a platen and printing instrumentalities, one of which elements is shiftable with relation to the other to any one of three positions, of case-shifting mechanism including a movable shifting device and means connectin said device to the shiftable element, sai means being arranged to communicate motion at times from said device to said element, and at other times notng as independent shifting means. 30. In a typewriter, in combination, a vertically shiftable type-bar support, a keylei er, and' means. connecting said key-lever to said support for shifting the latter, said means including a portion acting at times to transmit the shifting motion from the keylever to said support, and acting at other times as independent shifting means for moving said support to another shift position. a

In testimony whereof I allix my signature in the presence of two witnesses.

DE WITT c. HARRIS.

Witnesses ARTHUR GRAF, MARY Forum.

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