US1479231A - Typewriting machine - Google Patents

Description

Jian., l, 1924 11,479,231

M.. GARBELL TYPEWRIT ING MACHINE Filed Jan. 50, 1922 5 Sheets-Sheet 1 M. GARBELL TYPEWRITING MACHINE Filed Jan. 30. 1922 3 Shee t v2 Mmm jam., 19 w24 M. GARBELL TYPEWRIT-ING MACHINE 3 Sheets-Sheet 3 Filed lJan.

Patented dan. l, 1924i-,

- anni vio MAX GARBELL, 0F CHICAGO, ILLNOIS, ASSGNOR T0 GRBELL 'IYPEVVRIT1Ry COR- PORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

Application led January 30, 1922. Serial No. 532,632.

To all whom t may concern: y

Be it known that l, MAX GARBELL, a citizen ot the United States, residing at Chicago, in the county ot' Coole: and State ot Illinois, have invented a certain new and useful lmprovement in rlypewriting Machines, oi which the following is a full, clear, concise, and exact description, reference. being had to the accompanying drawings, forming a pa'ijwt of this specification. l

1h15 invention relates to improvementsin typewriting machines.

One object of the invention is to provide an eilicient and simple-line lock and stopping arrangement for typewriters wherein the ar- .rangementl consists of few parts relatively inexpensive to manufacture and assemble.

Another object of the invention is toi provide a line locking arrangement for the platen to prevent multiple impressions when the carriage reaches the end of the normal line movement and becomes locked. l

Other objects ofthe invention will more V clearly appear from l the description and claims hereinafter vfollowing.

In the drawings forming apart of this specification, Figure lis a part vertical sectional view part elevational view of the rear portion of a typewriting machine showing my improvements in connection therewith, the platen and longitudinally movable trame on which it is directly mounted being shown in central position. Figure 2 is an enlarged elevational view corresponding to Figure :l but showing the position ot the parte when the platen and its frame are at'the limit of the normal movement toward the lett, as viewed from the back of the machine, or toward theright, as viewed from the front of Athe machine-that is, the position corresponding to the' beginning of a line of written matter. Figure 3 is a view similar to Figure 2 illust-rating the position assumed by the parts when the platen and its longitudinally movable frame have set the locking mechanism which corresponds to the limit ot movement of the platen toward the right, as viewed from the back of the maehine,'or to the left. as viewed from the Jfront of the-machine Figure et is a view similar to Figure 3 but illustrating the 'platen still farther to the right, as viewed from'the back of the machine, and representing the eX- treme limit of movement of the platen.

Figure 5 is a vertical sectional view corresponding substantially to the section line 5 5 of yFigure 3. And Figure 6 is a part horizontal sectional view part top plan, the section corresponding to the line 6 6 of Figure 5.

In the drawings, Iv have shown my improvements as applied to a typewriting machine of that class such as shown in my Patent No. 1,305,893, dated June 3, 1919, and in pending applications No. 360,598, filed February 24, 1920; No. 464,133, filed April 25, 1921; and No. 741,029,1iled May 31,1921. As shown in said patent-"and applications, the typewriter is of that class commonly known as a portable typewriter yand is further characterizedby the fact that the'platen carriage by which term is included the platen proper,`the longitudinallymovable frame by which the platen is directly'carried and the sub-trame. on whichV the, slidable frame is supported) is readily removable from the main frame. Y

In said drawings,` the main frame of the machine is indicated at- 10, the same being supported onl suitable cushion pads 11, as customary. The platen'carriage includes a platen proper indicated at 12` and longi tudinally slidable frame 13 and-a sub-frame l111. The frame 13 and sub-frame 14 are provided with suitable tracks, as indicated at 15-15, with anti-friction balls 16 therebetween to minimize the friction to the movement of the frame and its platen. Although the details of the removable carriage arey not shown, reference may be had to any one of my said pending applications.

Mounted on the frame 13, and rigid therewith, is the longitudinally extending escapement rack 17 with which co-operates a gear 18 driven by a spring motor therewithin in a well-known manner.y 4The escapement 'mechanism shown, comprises a' pinion 19 in mesh with said rack 17, the pinion being rigid with a ratchet wheel 20, asbest shown in Figure 5. Said ratchet wheel 2O and pinion 19 are loosely rotatably mounted on a bushing 21, which, in turn, is supported on a stud shaft 22 rivetedto a bracket 23, which, in turn, is rigidly secured to the subrame 14. v f

Co-cperable with the ratchet wheel 2O is an escapement rocker dog 24, which-is pivotally mounted on the bracket 23 by means rockerdog 24 has a single tooth 26 adapted to engage successively `with the teeth of the ratchet wheel 20. Said rocker dog 24 is operated from the universal bar ol. the inachine by means of a link 27, as shown best in Figure 5. The rocker'dog 24r is normally held in its outermost position by means ot a Aspring 28 which is interposed between it and-'the bracket 23, Vsaid `spring 2S being i and.slidably-`mounted 'on aypin carried.V

by lthefrocker dog 24, as shown in Figures A scoped over'I mounted on a sleeve 29 which is loosely telebra'cket 23.

' Pivotally and slidably mounted on the'A rocker dog 24 is an escapeinent stepping dog 31,-which has an elongated slot 3 2 pivotally Y 1,2 and 3. The stepping dog has a single 1 .thereof and at its otlierend to a relativelyy TvVith this arrangementf the rocker dog 24iisbrought into' engage- =mentlwitha -tooth ofthe ratchet wheel 20 when the universal bar is actuated, thereby florcing the stepping'dog 31 out of engage- Vtooth 34 adapted to engagelthe teeth ot the ratchet wheel 2O successively and alternately relatively to the tooth 26g towardthe right, as viewedin' Figures l, 2 and 3, by ai coiled spring '35 which is atta'ched at one cnd'to'a Ydepending arm 36 -liXed flange g 37.

ment with the ratchetV wheel temporarily clined slots 43.

and allowing the latter to be' projected ltoward the right for the distance-pei'mitted bythe slot 32. As the rocker dog 24 swings outward `from the ratchet wheel 20,I the tooth 34 of the stepping dog engages with Athe next tooth of the ratchet wheel 2O and stops the latter a-lter it has been allowed a rotation in afclockwis'e direction4 Jfor av distance corresponding to one tooth.-

The '.escapemen't mechanism may be rendered inoperative sopas to allow tree movenient of the platen in' either direction[horizontally of the machine by means'of the pivoted clearing lever 38, which has a downwardly'extending arm 39 adapted to depress lthe'fstepping dog3l to an inoperative 'position vwhen thelever 38 Vis depressed. The

latter has an upwardly extending curved 'arm`l40 which rides A`beneath the clearing bar *'41, the latter' being vertically slidably -moun'ted on the ramevl'3 by means 'ol set screws'v 42 passing through elongated in- Y n l Said clearing bar is provided v with a linger 44 at the right-hand end,`-'as viewed inV Figures 1 and 2,'by which V said clearing bar may be depressed, thereby and rendering the a stud 30 carried by' `the spacing pawl 45 is shown adapted to cooperate witli the rack 17j said pawl 45 being kopeiated"` from a link46`v by suitable means,

as shown, for instance, Vin my said Vapplication No. 474,029. .s

The platen frame'l-B is provided with a margin i'ack,47 extending horizontally and in a position above and rearwardly of the vvescapeii'nent rack 17. Said margin rack 47 is pivotally mounted on suitable pivots '48*48'v and" is adapted to be oscillated about its pivots by a linger 49. Y As willbe understood, springmeans areemployed to nor mally hold said margin rack 248 in ak vertical position.

` Adjustably slidably mounted on said margin rack 48 are right a'ndlelt margin stops designated A and B, the right andleltbeing as viewed from the rear of the machine and las shown in Figure l. YSaid margiiifstops A" and B are of likeconstruction aiid'each preferably comprises a formed sheet metal housing r50` having a sloping top luwith a leaf spring 52interposed 'therebetween'and thek top edge ofthe margin rack` 47; "Said p Y housing 50 substantially encircles the mai'- *The stepping dog 3l' is spring-influenced gin rack 47 and has a suitable tooth-formation 53V at one endtorengage withthe ysquare 54 betweenV which is pivotally Vmounted, a

depending stop or linger 55.' Each-:linger is under the control of ay coiled 'tensionV spring 56, the arrangement being siich that the linger of the margin stopy B lcannot swing clockwise beyond the vertical position yshown in Figurev 1` and the linger 'of the other margin stop A cannot swing in'agcounter-clockwise direction beyond the -vf'ertical position shown in Figure l, althougheach istree to swing in the opposite direcspring 56. Y

As shown in Figure 5, a pivot screw 57 is mounted inthe outer end of the stud shaft '22' *"Pvomuy. mliIted on said screw 57 is a line lock designated generally by the yrelere'nce Cf Saidlin'e lock C is inthe form of asuitably shaped stamped platehaving an'upwardly extending arm 58 and adownwardly extending arm 59. y C is spring-'innuencedina counter-clockwise "direction" by.v means ol' 'a light coiled' spring 560 mounted onthescrew 57 andhaving` suitable engagement at its end withv the arm 58 andwith pin 6l carried by the.. enlarged flanged endv oit' the stud ,shaft 22.

'Said pin 6l also operates as a stop inconjunction with the 'arm 59` to limit 'Y the Acounter-clockwisev rotation of the Vline locking element C.'

The upper end of thev arm y58 of theV ele# ment C is bent Voutwardly substantially horizontally, as indicated at 582i, sor as to lie inthe path of the linger 550i' margin tion against Avthen action of the'controlling Said Yline lock stop B. The lower arm-59 of the element C is offset inwardly toward the platen, as indicated at 59aL in Figure 5 and is notched, as indicated at 62, so as to provide a rightangled tooth 63 adjacent the teoth26 of the rocker dog. Said tooth 63 may be slightly beveled t-o facilitate its entrance betweenthe rocker dog tooth 26 and the ratchet wheel 20. At its extreme lower end the -arm 59 is formed with an out-turned small shoulder flange 64 which is adapted to engage with the vertically extending edge of the rocker dog tooth 26, when the line lock'is operated, as shown in Figure 3. Y

The operation of the line lock is as follows. As` the platen moves from left to right, as viewed in Figures 1 and 3, the finger 55 of the margin stop B finally engages with the out-turned flange 58a and oscillates the locking element C against the `action of the spring 60, thereby forcing the tooth 63 of the Velement C behind the rocker dog tooth 26 and between said rocker dog tooth and the ratchet wheel 20. This lcondi- Jtion is illustratedv in Figure 3. The limit of oscillation of the element C is determined by the shoulder flange 64 engaging with the rocker dog tooth 26. In this condition of the parts, itwill be observed that the rocker dog 24 is prevented from further oscillation, yand is, infact, positively locked, Not only does this prevent further operation of the escapement mechanism which prevents further horizontal movement of the platen and its frame, but also it prevents the completion of the stroke of any type-bar of the machine, since the universal barcannot be operated on account of its connection with the rocker dog 24. This is of importance since it preventsmore than a single impression being placed upon the paper at the time the platen reaches the end of the line, as predetermined by the adjustment of the margin stop B on the margin rack 47.

It frequently happens that the operator desires to allow the platen to travel somewhat farther than to the point determined by the position of the margin-rack B. This is accomplished by the operator oscillating the margin rack 47 by means of the linger piece 49, thereby swinging the finger 55 clear of the locking element C and permitting the latter to be returned to its normal position under the influence of the spring 60. The linger 55 of the margin stop Bmay then travel toward the right a further distance, as viewed in Figures 1, 3 and 4. This distance ordinarily is three or four spaces and is determined by the finger 55 of the stop B coming into engagement with an outstanding horizontally disposed arm 65 on a stop plate D, which is rigidly fastened to the top of the rail 15 of the sub-frame 14, as shown in Figures 5 and 6.

@ocasionally it is desired to' allow the platen to move still farther toward the right, as viewed in Figures 1, 3 and 4, and this can be accomplished by the operator oscillating the margin rack 47 so as to permit the finger 55 of the margin stop B to clear said arm 65.` The platen and its frame may then move several teeth farther toward the right and the ultimate limit of movement is determined by a depending plate 66 carried by the frame 13 coming into engagement with the end 67 of said stop plate D (see Figures 4 and 6).

The platen and its frame are limited in their movement toward the left, as viewed in Figures 1 and 2, by the finger55 of the margin stop A coming into engagement with the end 68 of the laterally extended portion 6,5a of the arm 65, as shown in Figures 2 and 6. Occasionally it is desired that the platen be moved still farther toward the left, as viewed in Figures 1 and 2, and to do this the operator oscillates the margin rack 47 so as to clear the finger 55 of the margin stop A from theend 67 The ultimate limit of movement yof the platen and its frame 13 toward the left is then determined by another depending plate 69 fixed to the right-hand end of the frame 13, said plate 69 being adapted to engage with the shouldered end 70 of the st-op plate D.

In actual practice, the shouldered end 67 of the stop plate D and the plate 66 carried at the left-hand end of the platen frame will be soV adjusted that the ultimate limit of movement of the platen toward the right, which is shown in Figure 4, will occur when the rocker dog 24 and the stepping dog 31 are in the position shown in Figure 4that is, when neither of the teeth 26 or 34 are in operative engagement with any tooth of the ratchet wheeland when the tooth 26 of the rocker dog is positioned over a tooth of the ratchet wheel 20. ith this arrangement, it is evident that the rocker dog 24 cannot be oscillated or` actuated from the universal bar of the machine, and, consequently, in this position of the platen, duplicate or multiple impressions cannot be placed upon the paper.

As will be evident .from the preceding vdescription considered in connection with the drawings, the escapement kmechanism, the line locking element and the spring motor are all assembled on the one bracket 23, and, hence, may be applied as a unit to the subframe of the platen carriage. The other main element of the platen stop-that is, the stop plate D having the intermediate and ultimate stop shoulders, can readily be applied to the sub-frame and the necessary adliustinent readily effected, thereby minimizing the cost of manufacture and assembling and facilitating adjustment and repairs.

l have herein shown and described what l now' consider the preferred manner of carrying outl the invention, but the same is merely illustrative and l contemplate all changes and modifications that come within the scope of the claims appendedhereto.

l claim: V l. ln a typewriting machine, the combination with a main frame, a longitudinally movable platen-carrying frame, and escapement mechanism including a ratchet wheel and dog co-operable therewith; of a stop on said carrying frame; and means, located adjacent said dog and in the path of said stop', movable by said stop into the path of movement of said dog between the latter and the ratchet wheel to prevent opera-tion thereof.

2. In a typewriting machine, the combination with a main frame, a longitudinally movable platen-carrying frame, and escapement mechanism including a ratchet wheel and dog co-operable therewith; of a stop on said carrying frameg'and pivoted locking element, located adjacent said dog and in the path of said stop, movable directly by said stop into the path of movement of said dog to prevent operation thereof.

3. ln a typewriting machine, the combination with a main frame, longitudinally movable platen-'carrying frame, and esc-apement mechanism including a ratchet wheel land a rocker dog co-operable therewith;.of

a shouldered element mounted on said carrying frame; and means, located adjacent said dog and in the path of said shouldered element, movable by said shouldered element into position between said dog and ratchet wheel to thereby prevent rocking of said dog.

4l. In a typewriting machine, the combination with a main frame, a longitudinally movable platen-carrying frame, and escapenient mechanism.l including` va ratchet wheel and a dog co-operable therewith, said dog being operated from the universal bar of -the machine and arranged to oscillate about .an

axis parallel to the line of platenv movement;

of a shouldered velement carried by said carrying frame; and a spring-influenced piv-f oted locking element in the path of movement of said shouldered element and adapted to be actuated by the latter to project said locking element into the path of oscillation of said rocking dog and thereby preventy further actuation thereof.

5. In a typewritingmachine, the combination with a kmain frame, a longitudinally movable platen-carrying frame, andpescapement mechanism including a ratchet wheel and a pivotally mounted rocker dog cooperable therewith; .of a margin stop adjustably mounted on said carryingframe; and a spring-influenced pivoted locking element located in the path of movement of said margin stop and adjacent said rocher dog,said locking element being direct-ly engaged and movable by said margin stop vinto the path of oscillation of said lrocker Vnient of said stop, said locking element being oscillatable about an axis perpendicular to the line of movement of the platen andV Vadapted to be projected into the path of oscillation of said rocker dog between it and the ratchet wheel.l Y

7. ln a typewriting machine, the combination with a main framefa longitudinally kmovable platen-carrying frame and escape-ment mechanism; of a margin stop mounted onsaid'carrying frame; means cooperable with said margin stop to line-lock the platen; means for temporarily releasing the line-lock means to permit continued advancement ofthe platen-carrying frame; an intermediate fixed stop ,co-operable with said margin stop; and a linal stop cpo-operablel with alixed part of said platen-carrying frame, said intermediate andiinal stops being formed on a single plate. j

` 8. ln a typewriting machine, thecombination with a main frame, Va longitudinally movable .platen-carrying frame, and escapement mechanism; of right and left margin stops mounted on said carrying frame; a relatively fixed stop plate, said stop plate having right and Yleft intermediate stop shoulders co-operablewith said margin stops and provided also with vright and left ultimate stops; and right and left means, rigid` lwith said carrying Vframe adapted to cooperate with said ultimate stops of said plate. v V j 9. ln a typewriting machine, the combination with a mainframe, a longitudinally movable platen-carrying frame, and escapement mechanism; of right and `left margin stops mounted on said carryingframe; a relatively fixed stop plate, said stop plate having right and left intermediate stop Y shoulders co-operable with said margin stops Aand provided also with right and left ultimate stops; right and left means ,rigid Vwith said carrying frame adaptedv to co.-

operate with said ultimate stops of' said plate; and a pivotally'mounted margin rack on which said margin stops are adiustably carried, said margin rack being oscillatable Y to clear the vmargin stops of said ylintermediate stops on said plate.

l0. In a typewriting machine of the char-V acter described, the combination with the main frame; of a removable platen carriage including a platen, a platen frame and a sub-frame; escapement mechanism carried by said sub-frame; line-locking means co-operable with said escapement mechanism and carried also by said sub-frame; and means on said platen frame for operating said linelocking means.

l1. In a typewriting machine, the combination with a horizontally movable platen frame; of escapement mechanism co-operable with said frame, including a ratchet wheel and a rocker dog operable from the universal bar of the machine, said rocker dog having a tooth oscillatable into and out of engagement with the teeth of the ratchet wheel; a margin stop mounted on said frame; and a spring-influenced locking element pivotally mounted on the same axis as said ratchet wheel, said element having one portion thereof in the path of movement of said margin stop adapted to be actuated thereby and another portion adapted to be projected between said tooth of the rocker dog and the ratchet wheel whereby to prevent further oscillation of the rocker dog.

12. In a typewriting machine, the combination with a main frame, a platen-carrying frame movable horizontally, and escapement mechanism, including a ratchet wheel, a rocker dog and a stepping dog co-operable with the ratchet wheel; of a margin rack mounted on said carrying frame; and a spring-influenced locking element pivotally mounted on the same axis as that of the ratchet wheel, said element having one portion thereof in the path of movement of said margin stop and another portion adjacent said rocker dog and stepping dog but normally out of operative relation with,

respect thereto, said margin stop being adapted to actuate said element against the spring inuence to thereby project said last named portion of said element between the rocker dog and the ratchet wheel.

13. In a typewriting machine, the combination with a main frame, a platen-carrying frame, andv escapement mechanism including a ratchet wheel and a dog co-operable therewith; of a margin rack pivotallv mounted on said carrying frame; right and left margin stops adjustably mounted on said rack; a relatively stationary stop plate having right and left intermediate stop shoulders and right and left ultimate stop shoulders, said intermediate stop shoulders being in the path of movement of said margin stops and the latter adapted to be freed therefrom by oscillation of the margin rack; right and left means on said carrying frame co-operable with said ultimate stop shoulders; and means, operable from one of said margin stops, to prevent actuation of said rocker dog.

In witness that I claim the foregoing I.

have hereunto subscribed my name this 6th day of January, 1922.

. MAX GARBELL. Witnesses:

UNA C. GRIGsBY, ANN BAKER.

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