US827805A - Type-writing machine. - Google Patents

Description

No. 827,805. 'PATENTED AUG. '7, 1906. G. M. KIT-ZMILLER.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 18, 1902.

2 SHEETE? SHEET 1.

WITNESSES INVENTOR ymmv w7 I jWWW/W N0- 827,805. PATENTED AUG. 7, 1906.

G. M. KITZMILLER. TYPE WRITING MACHINE.

APPLICATION FILED JUNE 18, 1902.

[ 2 $HEEIS-SHBET 2.

INVENTOR UNITE STAKES PATENT OFFICE.

GEORGE M. hlTZll HLLER, 0F NORFOLK, VIRGINIA, ASSIGNOR TO WYGKOFF, SEAMANS & BENEDICT, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

rr'ee wsrrme Mam-use.

Specification of Letters Patent.

' Patented Aug. 7, 1906.

Application 5195 June 1a'1902. Serial No. 112.199.

mately a letter-space as each letter is printed;

It also has for its obj ect to cause a uniform and certain feed or spacing at high speed and eliminates the jerk (commonly known as a kick to operators) at the instant the keylever is depressed.

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

In the accompanying drawings, Figure l. is a fragmentary perspective view of suliicient number of parts of one form of type-writing machine to illustrate my invention. Fig. 2 is a side elevation of the various parts of the escapement mechanism detached from the machine. Fig. 3 is a plan view of the same, taken on. the line as w of F ig. 2. Fig. 4 is an enlarged vertical sectional view through the center of the shaft 16. Fig. 5 is a plan. view of the under side of a loose escapement-wheel. 14-, showing the downwardly-projecting hub and lug thereon. Fig. 6 is a detail view showing the means ,for limiting the movement of the ratchet-wheel 14; and Fig. 7 is a detail plan View of the upper back ratchet, the View being taken on the line 3 y of Fig. 2.

It is a common practice to provide typewriting machines with a vibratory bar or rocker-arm, carrying a fixed or holding dog and a loose or spacing dog, coacting with a ratchet-wheel or a segmental toothed bar or rack to feed. the carriage fo rward, which construction makes the machine relatively slow, owing to the carriage being held stationary for an undue length of-time after the im iact of the type upon the platen. Also in those machines employing a beveled fixed dog to allow the carriage to begin its motion before it is wholly released there is usually a cam or rubbing actionbetween the beveled dog and the face of the rack-tooth, oifering'undue re-.

sistance to the touch and causing a failure of contact between the type and the paper if the stroke upon the keyboard be light or hesitatingly done. By means of my invention each and all of the foregoing objections are avoided in a large measure.

While I have shown my invention applied to a front-strike machine, it should be understood that the invention is' applicable to various forms of,typewriting machines.

In the example herein shown 1 indicates I the frame'of the machine, in which are pivoted key-levers 2 and spacing-levers 3, connected by a spacing-bar. A rack 4 is carried by the carriage, (not shown,) and a universal bar 5 extends beneath the key-levers and spacelevers, and restoring-springs 6 and crank- ,arms and links 7 are operatively connected to' the universal bar.

The escapement mechanism proper comprises a horizontally-disposed ratchet wheel or disk 12, provided with crown-teeth 13, said ratchetwheel being rigidly secured to a vertically-disposed shaft or spindle 16, j ournaled in a plate 18 andbar 19, rigidly secured to the frame of the machine. Mounted to turn or rotate in a horizontal plane on the shaft 16 is a loose escapementswheel 14, provided with peripheral ratchet-teeth 15, concentr'c with and contained within a line of circul rly-arranged crown-teeth 13. The escapementwheel 14 is impelled or drivenaroundlin the same direction that the shaft revolves lbythe action of a coiled spring 20, (see Fig. said spring being attached at opposite ends to the adjacent faces of the ratchets 12 and 14 by means of the small holes or sockets 2,5 and 26, the ends of the spring being bent at r1 ht angles for this purpose and being seated within said holes or sockets 25 and 26. f

The escapement wheel or disk 12 islprovided with an: upwardly-projecting central .hub or sleeve 21, integral therewith, which is mortised or recessed segmentally, as at 22, said recess having movably seated therein a lug 23, depending from the downwardly-projecting hub of the loose wheel 14. 'llhe lug 23 is smallerthan the recess 22, which latter ill is of sufficient width to permit the loose wheel 14 being rotated independently of the fixed escaperncnt-whecl 12 by the action of the spring 20 a distance equal to the distance between. each two adjacent teeth of said wheel 14, the ends of the recess 22 acting as stops for the lug 23, thereby limiting the independent rotative movement of the wheel 14 on the shaft 16. The wheel 14 lies with the operative surface of its projecting teeth 15 normally in the plane of the operative surface of the crown-teeth 13 of the disk 12 and is held in position by the adjustable collar 27, mounted on the shaft or spindle 16. I

The shaft 16 carries a backing ratchetwheel 28 in a casing 28, which is made fast to the shaft 16 by means of the set-screw 30. oppositely-dis osed pawls 28 are pivoted to said casing an engage the ratchet 28 to afford a movement of the carriage fron'i le't to right without affectii-lg the escapement mechanism. A pinion 17 has a bearing upon the end of the shaft 16 and is-integral WViil] the ratchet-wheel 28", contained in the casing 28, said pinion 17 and the integral ratchet-wheel in the casing being held in position by a shouldered screw 29, threaded into the end of-the shaft 16.

Formed on the lower or under face of the disk or crown toothed. ratchet-wheel 12 is a secondary back ratchet-wheel 31, and a spring-actuated pawl 32 is mounted on the plate '18 so as to engage with the teeth of the which backward rotation would otherwise be caused by the spring 20 if the carriage-rack or toothed bar 4 should be raised out of mesh with the pinion 17 by the operator while the pawl 11 is in engagement with the teeth 15 of I the loose Wheel 14. Thus the shaft 16 is held in a substantially fixed position when' the v rack and pinion are disengaged.

Thepawl or dctent 1] is formed on or at tached to the end of an arm. 33 and is arranged to alternately engage the teeth 13' and 15 and arrest the movement of the end of the guide-bracket is slotted, as at 40,

andthe other end of said bracket is provided .wi-th transversely-bored pendent ears 35;

The arm 33 is movably arranged in the slot 40, and a pin or bolt 36 passes through the slot in the arm 33 and is transverselyfixed in the pendent cars 35. The arm 33 is pro vided with a pendent and vertically slotted- "arm 37 Formed in the plate lfiparal lel with the arm 33 is a slot 38, andfpa'ssing through said slot are two adjusting-screws 39,"wh ieh at their lower ends are screwed bell-crank lever is a pin 41, which loosely fits the slot in the pendent arm 37. The other end of the bell-crank lever is pivotally connected to a link 8, that is also connected to the universal bar 5.

The bracket 34 is slotted, as at 34-, and formed integrally with the arm 33 and projecting upwardly through the slot is a forked arm or extension 45. -A pin 46 projects lat- 3 erally from one arm of a lever 47 pivoted at 48 to a member 49, which is connected to the platen-shifting mechanism. (Not shown.) The forward arm of the lever 47 has a forked end 50, by means of which said lever is connected to the lower end of a vertically-moving ribbon-vibrator 51 to elevate the ribbon a short distance every time thepawl 11 is reciprocated to permit the carriage to move forward alettenspace.

' From the foregoing description it"will be understood that the feed dog or pawl 11 with the memebr 33, that forms a part thereof, has a sliding reciprocating rectilinear movement toward and from the teethmofthe two escapement-wheels and wheels. 1

In Fig. 1 of the drawings the parts are shown in their normal positions, the pawl 11 being in engagement with the teeth 15'of the loose or feed wheel 14 before the key-lever is depressed. The rack or toothed bar .4 being attached to the paper'platen-carriagein the radially of said usual manner is lmpelled f( )rward by the tension of a spiral spring or motor-spring, as usual, and imparts motion to the shaft 16 through the medium of the pinion 17 and the ratchet 28, turning the shaft in the direction desi nated by the curved arrow at Fig- 1 of the rawings. Upon the depression of a keylever 2 or the space-bar attached to the levers 3the universal bar 5 is lowered and rocks the bell-crank lever 9 by means of the connect ing-link 8, said bell-crank lever-imparting a horizontal longitudinal movement to the arm 33,-whic1f moves the pawl or detent 11 out of u on the spiral spring '20 drives: or rotates te loose wheel around until its action is r to the platen-carriage.

and the periphery of the wheel 14.

leased, thus imparting a ste -bystep motion Be ore the key-lever is depressed or while the parts are in their normal positions the space 43 between the teeth 15 and the space 44 between the crown teeth 13 are directly opposite or in a radial line, as shown in Fig. 3, said space 44 being in the plane of movement of the pawl 11, which throws the operative face of the teeth 13 slightly away from the operative face of the pawl 1 1 and insures its entrance between said teeth without frictional or binding action. Inasmuch as the loose Wheel 14 and the rigid wheel 12 are cut so asto converge to their centers and owing to the differences in size of the wheels, the shortest ossible stroke will suffice to effect the desire result. It will be apparent that by the novel employment of a crown-toothed wheel I get a bearin on the teeth of the whe l 12 with a quick re ease, said bearing being equal to the distance between the inner wall of the wheel 12 Another advantage is that by the use of a crown-tooth wheel with the loose spur-tooth wheel mount' ed within the inner walls of the teeth series I am enabled to reduce the diameter of the loose spur-wheel, thereby reducing the are described by the loose wheel, and, furthermore, a more even bearing will be exerted upon both wheels by the pawl. 11. l have found in actual practice that this could not be accon'iplished by two spur-wheels even if one were smaller than the other, as it would require a specially-designed pawl with results not so satisfactory as can be accomplished by the construction. just described. By the use of my device, however, the disadvantages enumerated are overcome, and the instant the key-lever is released the pawl 11 will in stantly and completely disengage.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is- I 1. A device for controlling the feed movement of a type-writer, comprising a rack-bar attached to the platen-carriage, a shaft carrying a pinion engaging said rack-bar, means for preventing backward movement of the shaft, a crown-toothed wheel fixed on the shaft, a spur-toothed wheel loose on the shaft, a coiled spring yieldingly connecting said toothed wheels, a reciprocating pawl arranged to alternately engage said teeth to permit a stcp-by-step rotation of said. shaft and pinion, and means operated by the keylevers of the type-writer for actuating said pawl, substantially as described.

2. in a 'device for controlling the feed movement of a t pe-writer, comprising a rack-bar attached to the platen-carriage, a shaft carrying a pinion engaging said rackbar, means for preventing backward movement of the shaft, a crown-tooth wheel fixed by-step rotation of said shaft and pinion, and 4 means operated by the key-levers of the typewriter for actuating said pawl, substantially as described.

3. In a device for controlling the feed movement of a type-writer; comprising a rack-bar attached tothe platen-carriage, a shaft carrying a pinion engaging said rackbar, means for reventing backward movement of the shat, a crown-tooth wheel fixed on the shaft, a spurtooth wheel loose on the shaft, a coiled spring yieldingly connecting said toothed wheels, a stop for limiting the movement of the loose wheel relatively to the fixed wheel, a reciprocating pawl arrangedto alternately engage said teeth topermit a stepby-step rotation of said shaft and pinion, and means operated by the ke ,'-levers of the typewriter for actuating said pawl, substantially as described.

4. In a device for controlling the feed movement of a type-writer, comprising a rack-bar attached to the platen-carriage, a shaft carrying a pinion engaging said. racl bar, means for preventing backward movement of the shaft, a crown-toothwheel fixed on the shaft, a spur-tooth wheel loose on the shaft, a spring yieldingly connecting said toothed wheels, a segmental recess in the hub of the fixed wheel, a lug projecting from the hub of the loose wheel and loosely seated in said recess, a reciprocating pawl arrai'iged to alternately engage said teeth to permit a step-l ystep rotation of said shaft and pinion, and means operated by the key-levers of the type writer for actuating said pawl, substantially as described.

5. In a device for controllingthe feed movement of a type-writer, comprising a rack-bar attached to the platen-carriage, a shaft carrying a pinion engaging said rackbar, means for reventing backward movement of the shat, a crown-tooth wheel fixed on the shaft, a spur-tooth Wheel loose on the shaft, a coiled spring yieldingly connecting said toothed wheels, a reciprocatin pawl arranged to alternately engage sai teeth, a bell-crank lever connected at one end to said pawl, and a link connecting the other end of said bell-crank lever to the universal bar of the type-writer, substantially as described.

6. A device for controlling the feed movement of a type-writer, comprising a rack-bar attached to the platen-carriage, a shaft carrying a pinion enga ng sald rack-bar, means I for preventing bac ward movement of the shaft, a crown-tooth wheel fixed on the shaft,

a spur-tooth Wheel loose on the shaft, a coiled spring yieldingly connecting said on the shaft, aspur-tooth wheel loose on the toothed wheels, a reciprocating pawl arranged to alternately engage said teeth, a bell-crank-lever connected at one end to said awl, a link connecting' t'he other end of said iielLcrank lever to the universal bar of the type-Writer, and a, forked yoke carried by said awl and arranged to engage and actuate t e ink-ribbon movement substantially as described.

7. In an escapement mechanism for typewriters, the combination of a ow er-(lriven carriage and a rack-bar connected thereto, a revolving shaft mounted in stationary bearings carrying a pinion, a erown-tootlmd wheel connected rigidly thereto, and provided with a hub having a concentric groove or notch; a SPllP-l'OUillttl wheel mounted to turn loosely upon said shalt, having a lug projecting from the huh thereof, said lug being adapted to limit the rotary movement ol' said loose wheel upon the shaft, and a spiral spring applied. to turn the loose wheel upon said shaft or spindle, substantially as de scribed.

8. In an escapement mechanism lor t \"pe writers the combination ol a power-driven carriage and a rack-bar connected thereto, a

ing-ratchet upon one end thereol", a crowntoothed ra-tchet-wheel mounted rigidl upon said shalt, a loose wheel mounted to turn upon said shalt, said loose wheel being mounted in the plane of the \vorliing-suri'ace of theteeth olilower ratchet. or crowntoothed wheel and a spring adapted to turn same, a pawl adapted to engage either of said.

ratchet-wheels, and means for operating the parts, substantially as described.

9. In a type-writing machine, the combination with a carriage of two relatively mo vable concentric esca 1emerit-wheels, and a single cooperating leet -dog mounted to receive a reeiproc'atil-ig rectilinear sliding movement revolving shaft carrying a pinion, and al)tttli radially of said wheels, and to atl 'ord a stepby-step feed movement of he carriage. '10. In a type-wrltmg machine, the cominnation of a verti(ally-disposed shaft a horizontally-d1sposed esca nmient-wheel fixed to said shaft, a second horizontally-disposed escapement-wheel'loose upon said shaft and t adapted to receive a limited movement independently of said. first--mentioned escapei'nent-wheel, and a feed-dog that is mounted to slide in a horizontal plane and to receive a rectilinearmovement radially of the escapement-wheels'and to cooperate with said escapement-wheels.

1]. in a type-writing machine, the combination oi carriage-feed devices comprising a plurality ol' escapement-wheels and a single teed-dog that cooperates therewith and which receives a rectilinear movement radiallyof said wheels, and means connected to and actuated by said teed-dog and. adapted to elevate the ribbon at each operation of said, teed-dog. v

.12. in t vpi -\\'riting machine, the combination ol carriage-feed devices comprising two escapenmnt-wheels and a single reciproeating Feed-dog that receives a rectilinear movement radially of said wheels and cooperates therewith, a universal bar connected to said teed-dog to reciprocate or slide it to ell'ect the :l'eed ol the carriage, and means connected to and. actuated. by said feed-dog to elevate the ribbon at each operation of said teed-dog.

ln testimony whereof I have hereunto set my hand in presence of two subscribing Witnesses.

GEORGE M. KI'lZltIILLERi itnesses:

(ha 1: axon S. HoWELL James A. llALLEY.

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