US1411238A - Typewriting machine - Google Patents

Description

E. s. DODGE.

TYPEWRITING MACHINE.

APPLICATION FILED AUG-19,1921.

Patented Mar. 28, 1922.

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E. S. DODGE.

TYPEWRITING MACHINE.

APPLICATION man AUG.19, 1921.

1,41 1,238. Patented Mar. 28, 1922.

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50 2, of a fragment of the machine-that fragmentcomprisingtliQ- escapement mechanism and parts-of the -framework,-carriage and- UNITED STATES.

PATENT OFFICE.

ELBERTS. DODGE; OF ILIQNT'; NEW-1YORK, ASSIGNOB TOIREMINGTON TYPEwRITER I COMPANTYgOFILION, N'EWYORK, A-CORPORATION"OF"NEWYTOBK.

TYPEWRITING ACHI E;

Specification of LettersPatent. Pate t d31y[a 28 1922;

Application filed August 19, 1921. Serial iNo. 493,513.v

provide new and improved meansfor feeding the traveling carriage ste by step from left to right as is desirab e in writing Hebrew and similar languages.

'A specific object of theinvention is to adapt the Remington typewriting machine with very slight constructional changes to reverse the usual direction of feeding movement.

In the machine to which my invention is shown as applied, a carriagethat supports a roller platen on which type bars act is drawn along step-by-step under the control of an escapement, composed of a toothed wheel and feed dogs which coact with it. The carriages of these'mac-hines are thus drawn usually from right to left and in some instances from left to right, the direction of, the step-by step travel depending on the language to be typewritten. The carriage of a-machine embodying this inven tion is thus drawn from left to right. Such a machine may be used in writing the Hebrew language and others, which are written left. 7 1 H The invention consists of featuresuofconstruction, combinations and'arran'gements of parts, which are set forth herein and defined in .the claims.

In the accompanying drawings, which f show only so much of 'a machine asit is believed to be necessary to lllustrate in setting forth a full, clear and exact de scription of the invention, and-in whichlike reference numerals designate like parts in the different views. w p

Figure 1 is aside "elevation and vertical longitudinal section on-the plane 1-1, Fig.

carriage propelling mechanism; 7

Figure 2 =18 a plan of a fragment comin lines that are-readfrom ri-ght to prising parts of the .e'scapement Inechanism,

framework, carriage and carriage propelling mechanism;

Figure 3is a rear elevation andvertical cross section on the planes 3+3, Figure 2, of a fragment comprising the .escapement.

mechanism, carriage propelling mechanism.

3113- parts vof the carriage and framework; an

Figure 4 is a plan of a sliaft supporting. bracket.

Allthat is comprised in the machine and i that is not illustrated herein, with the exception of the type, is contained in the wellknown Remington typewriter which as illustrated herein, also comprises the top plate 5, platen carriage 7,}fixed rail 8, roll-, ers 'lO'and ll, rack-baillQ, carriage rack 15, hanger 18, dog rocker 20, feed dogs 21 and 22, bracket'23, shaft 31, escapement wheel 34, pawl 36, ratchet wheel 38, spring drum 14, strap 415, and link 46 engaging the pin 47 on dog rocker 20 at its lower end.

The rack bail .12 which includes the arm 13 at its left endand a similar arm at its right end, is. hinged to brackets fast. on the carriage by the bolt 14. and another like it.

The rack 15 is rigidlyattached to the bail 12 by the screw 16 and another like it, which pass throughthe rack and into the bail near its ends. The arrangement of this rack in the herein described machine is such that the vertical face of each of the teeth 17 is on the right of its sloping face instead of on the left as it is when the rack is usedin' a machine that writes English. In other words, the. right end of the rack in one machine is itsleft end in the other. The hanger or stationary dog rocker sup-. port, at the top, extendsacross the recess 6 in the topplate 5 and is rigidly fastened to thetop plate by screws driven .into it from the upper side. The dog rocker 201is pivotally mounted in the hanger so that it may rock on the'pivot pin l9'fand another. pivot pin secured in the hanger-at the left side of the rocker. Thebracket'23 stands on the hanger'18. The'base 24 ofthe bracket, ex

in the hub of the wheel and making contact with a seat on the shaft. The block 25, which ispart ofibracket 23, the front portion of which extends into the recess 9 in the fixed rail 8, formsthe bearing of journal 32 and-the tube 27 extending through part 26 of bracket 23, forms the bearing of journal 33. Part 26 is split and the screw 28 passes through the sections and when it is tight the bearing tube 27 is clamped in the part 26 of the bracket. Pawl 36 is mounted on pin 37 fast in es capement wheel 34: and spring 39 supported by another'pin fast in the escapement wheel forces the nose of the pawl against the teeth of the ratchet wheel 38.. This ratchet wheel has internal teeth whichact on pawl 36 and has external teeth besides. It is a duplex ratchet wheel and forms not only part of the means by which motion is imparted to the escape ment wheel from sleeve 10, but also a part of back spacing mechanism which Remington machines usually contain.

In the Remington English-writing machine, the .ratchet wheel 38 constitutes an enlargement ofa rotary sleeve which surrounds and has hearings on the shaft of the escapement wheel. and which the carriage turns, as it steps from right to left, so that a tooth of the escapement' wheel, on being released from the holding dog, moves to the right. The sleeve l0 in this machine is so turned, by force transmitted to it from thecarriage as it steps from left to right. Therefore the joint operation of the escapement wheel and feed dogs is the same in this machine as it is in the English-writing machines.

The strap 15, by which. the spring drum pulls the carriage along step-by-stcp and which'in machines used in writing English is connected to an arm affixed to the carriage at its right end, passes fromdrum 4:4.

to the under side of the roller 48 and thence halfway around this roller and from the top thereofto the part 51 ofan arm fast on the carriage at its left end. This arm includes the part 52 formed on and extending backward and upward from the base 53 which is fastened by screws .54: to the carriage. Part 51 isofiset and extends downward from part 52 and has at itsflower end a hook 55 and guard 56. nected to hook 55 by the link'57 which is attached to the strap and through which the hook passes. The roller 48, which has the flange 19, is loosely mounted on' the screw stud 50 which is attached to the fixed rail 8. Hence, the spring drum, when it imparts motion to the carriage, moves it from left to right. V v

The bracket or supporting arm 58, which isattached at its right end to bracket 23 by the screws and which extends over sleeve 40, has at its :left end the block 60.

Strap 45 is con- This is a bearing block in which the short shaft 61 is mounted and from which it projects at both the front and rear faces of the block. The shaft 61 is parallel to shaft 31 and the forwardly projecting part of shaft 61 extends underneath the rack 15. The gear 62 is fast on shaft 61 at its front end and normally is engaged by the rack; The gear 63 is fast on this shaft at its rear end and meshes with gear43 on ,sleeve 40 behind the rack. spring drum 44 acts through rack 15 on gear 62, and through gear 63v on gear a3, and through ratchet 38 and pawl 36 on the escapement wheel 34, and that as the carriage steps from left to right wheel 34; turns m the same direction as does the escapement wheel of. an English-writing machinefwhe'n its carriage steps from right to left.

Whenever a printing key is. actuated, link 46, connected to the universal bar of the,

machine pushes the lower end of the dog rocker returns to its normal position with the upward movement of the key.

The bracket or arm 58 and the bracket It will be seen that the rocker backward. vThe carriage steps as" the 23, fastenedtogether by the screws 59, form a unitary support which is detachably secured to the hanger 1S and frame of the machine and on which is mounted operative connections between the feed rack andv feed dogs. This sup-port with the mechanism mounted on it may be taken out of the machine on the removal of screws 29 and 30,

other changes neededand requiring the dolng of mechanical work are the addition of anism including the sleeve 40, gear 4L3, short 1 shaft 61 and gears 62 and 63. .The only 7 the roll 48 and arm 51 52-53, the reversal of the rack and the equipment of the type bars with suitable type.

Although the invention is especially useful in Remington machines, it is not intended hereby to restrict it to use in such machines.

What I claim is new and desire to secure by Letters Patent, is I 1. In escapement mechanismof typewrita ing machines, which comprises an escapernent wheel, a shaft to which the wheel is affixed and which is supported at its ends by a fixed bracket, arotary sleeve surrounding and V rack, a gear meshing with said gear and fast on the short shaft at the rear end therehaving bearings on said shaft, and means to impart motion from the sleeve to the wheel, only when the sleeve turns in one direction, the combination of a gear fast on said sleeve, a short shaft parallel to said, shaft and having a bearingin an arm of said bracket, a gear meshing with said gear and fast on the short shaft at one end thereof, and a gear with which the carriage rack engages and which is fast on the short shaft at its other end.

2. In escapement mechanism of typewriting machines, which comprises an escapement wheel, a shaft to which the wheel is afiixed and which is supported at its ends by a fixed bracket, the front end of the shaft being below and in front of the carriage rack and the wheel being afiixed to the shaft close to its rear end, arotary sleeve surrounding and havingfbearings on said shaft, the front end of the sleeve being close to the bearing at the front end of the shaft, and means to impart motion from the sleeve to. the wheel only when the sleeve turns in one direction, the combination of agear fast on said sleeve behind the carriage rack, a short shaft parallel to said shaft and having a' bearing in an arm'of said bracket and extendlng forward from said arm and underneath the carriage of, and a gear fast on the short shaft at its front end and arranged to be engaged by the carriage rack.

3. In a typewritlng machine, the combination of a traveling carriage; a feed rack thereon; a dog rocker; feed dogs on said rocker; a unitary support detachably secured to the frame of the machine; and carriage feeding devices mounted on said support and providing operative connections between said feed rack and said feed dogs, said connections comprising a feed pinion normally meshing with said rack, a toothed escapement wheel co-operative with said dogs, and constantly intermeshing gears connecting said pinion with said escapement wheel.

4t. In a typewriting machine, the combination of a traveling carriage; a feed rack thereon; a dog rocker; feed dogs on said rocker; a unitary support detachably secured to the frame of the machine; and car riage feeding devices mounted on said support and providing operative connections between said feed rack and said feed dogs,

said connections comprising ajfeed pinion' normally meshing with said rack, a toothed escapement wheel co-operative withv said dogs, and constantly intermeshing gears connecting said p1n1on with said escapement wheel, one of said gears being rigid with capement wheel shaft, a gear wheel coaxial with said shaft, a detachable one-piece bracket,- a feed pinion mounted on said bracket, and a second gear wheel also mounted on said bracket and adapted to intermesh with the first recited gear wheel.

6. In a typewritingmachine, the combination of a carriage, a sprlng drum constantly tending-to turn to the left, a guide roller, a band or strap connected to said drum and also to the left-hand end portion of the carriage, saidband 0r strap running over said guide and tending to impel the carriage rightward, a feed rack on said carriage a dog rocker, feed dogs on said rocker,

toothed escapement wheel, an escapement wheel shaft, a gear wheel coaxial with said shaft, a detachable one-piece bracket, a feed pinion mounted on said bracket, and a second ear wheel also mounted on said bracket and adapted to intermesh with the first recited gear wheel.

7'. In escapement mechanism of typewriting machines, in which mechanism'an escapement wheel and shaft and means for trans- 'mitting motion thereto from the carriage rack are included, and in which means a short shaft and two gears are included, a supporting bracket on which the escapement .wheel shaft is mounted, an dan arm which is attached to apart of the bracket and extends over the shaft of the wheel and on which said short shaft and two gears are mounted, the short shaft having a bearing in the arm and the two gears being fast on the short shaft. Signed at Ilion,' in the county of Herkimer, and State of New York this 16th day of August, A. D 1921. r

1 I ELBERT S. DODGE. Witnesses:

H. J. KEELER, LINNIE F. BURNETT.

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