US2193511A - Typewriter - Google Patents

Description

March 12, 1940. w, EjgEL-r 2,193,511

' mmrgsn l Filed nay 1934 .svsheets-sneet 1 fllg. 1

March 12,1940.v w. E-,SELT 2,193,511

' TYPEWRITER v Findlay 25. 1934 l s 'sheets-sheet 2 @y 8 1sY Matth 12, 1940. I wrgisEL-r 2,193,511

-A mnwnunn Filed lmay 25. 1934 5 sheets-sheet s fly. 10

gifle Marh12,194o. 5,5m I. 2,193,511

TYPEWRITER l Filed May 25, 1934 5 shets-sheet 5 Y i Si w 1S s? f ma o n 11 F Q 115 Q1 x Y INI ',:hdl`l/l-. Q I N 1:2-:f Q u Patented Mar. 12, 1940 j l2,193,511 A PATENT OFFICE mEwm'rEa Willy Eiselt, Siegmar, Germany, assignor to' Wanderer-Werke vorm. Winklhofer & Jaenicke Akt.-Ges., Schonau-Chemnitz, Germany Application May 25, 1934, serial No. '127,565

In Germany May 30, 1933 4 Claims.

This invention relates to typewriters, vmore particularly to a mechanism for the stepwise spacing operation of the paper carriage of typewriters, whereby the size of the steps is variable.

An object of the present invention resides in the provision of a mechanism for the stepwise operation of the' paper carriage, whereby the size of the steps is variable as is particularly required in typewriters for oriental languages which have lll characters of dilerent widths.

In the known typewriters of this type it is not possible to change the steps of the paper carriage without vfundamentally changing the machine. For the slightest modication of the once fixed l5 keyboard extensive changes must'be made which are expensive because many parts of the machine l must be remade. This is of particular disadvantage when trying to adapt a conventional model of typewriter for all oriental languages because' the great variety of these languages and of sets of characters requires various modications of the keyboard. Also the user of a typewriter often desires to change certain type characters so that the machine must be provided with different key arrangements.

It is an object of this invention to avoid these disadvantages and to provide an improved typewriter which can be easily made to t for any idiom or keyboard of oriental languages.

It is another object of this invention to provide an improved typewriter in which the dierent spacing movements of the paper carriage can be readily effected.

Further and other objects of the present in- $5 vention will be hereinafter set forth in the accompanying specication and claims and shown in the drawings which, by way of illustration, show what I nowV consider to be a preferred embodiment of my invention.

In the drawings which illustrate an embodiment of my invention by way of example, *only such parts of the typewriter are shown as are essential for disclosing my invention. Other known parts of typewriters which are not essen- 45 tial for illustrating my invention have been omitted in order to simplify the disclosure.

In the drawings: Fig. 1 is a top VView o'f the keyboard and key levers.

50 Figs. 2, 3, 4 and 5 -are side views of four dierently acting key levers and the coacting abutment andrbails.

Fig. 6 is a part cross sectional view through the machine with the paper carriage in the lower case shift position.

(Cl. 19T-84) Figs. 7, 8 and 9 diagrammatically show the .cooperation of the key levers with the different abutment and transmission members when operating-individual groups of keys and when the paper carriage is in the lower case shift position. 5

Fig. 10 is a part cross sectional view through the machine with the paper carriage in the upper case shift` position.

Figs. l1 and 12 are individual illustrations corresponding to Figs. 7, 8 and 9 but showing the l0 coaction of the individual parts when the paper carriage is in its upper case shift position.

Fig. 13 is a part cross sectional rear view of the` escapement mechanism and transmission members with the machine in rest position.

Fig. 14 isa rear view of the escapement mechanism showing the movable escapement pawl swung in multi-step position.

Fig. 15 is a partial section through the machine with a position of the parts corresponding to Fig. 9, showing the type lever drive in typeprinting position and the operation of the type levers on' the carriage spacing mechanism, and the case shift mechanism.

In all figures like numerals indicate like parts.

As apparent from Figs. 6 and 10 of the drawings, a case shiftV frame 2 is movably connected to the machine frame I and guided by means of a slot 3 which engages pins 4 which are xed to the typewriter frame I. This case shift frame 30.

can be set at one or more elevations as'compared with the base position by means of case Shift keys 'l0 indicated in Fig. l and'not particularly shown becausethey are well known in the art of making typewriters. The shift frame 2 is pro- 35 vided with guides 5 for the longitudinal movement ofthe carriage 6. The carriage 6 whichv carries the writing cylinder orplaten 'l is provided with a rack ll, which cooperates with the gear S connected to an escapement Wheel l ll, and 40' is, stepwise moved by the action of the carriage pulling spring not shown, the steps corresponding to the width of the characters.

'Ihe carriage spacing mechanism consists substantially of an escapement pawl vcarrying body Il which can rock about an axis 5l in the. case shift frame 2 and which carriers a fixed pawl I2 and a movable escapement pawl I4. These escapement pawls cooperate successively during the rocking of the body l I about its axis 5l, with 50 the teeth of the escapement wheel I0. When the paper carriage is stationary, the movable pawl I4 engages the escapement wheel I0 which is urged by the usual carriage pull spring in anticlockwise direction, Fig. 13, but is prevented from movement of the body ,II about the axis 51 always takes place in the same manner and has no inuence on the spacing l"distance of the carriage. The-spacinglstep is eected in the following marinera. 'indiennne body Il rocks about its axis 51 in clockwise direction, Figs. 6 and 10. the fixed pawl I2 first engages the escapement wheel I and holds the same, whereupon further rocking of the body II in clockwise direction brings the movable pawl I4 out of enga ement with the escapement wheel. After the movable pawl I4 has come out of engagement with the wheel I0, it is rocked by the action of the spring I3, Figs. 13 and 14, about its pivot 58 in the body II, in anti-clockwise direction. k'I'his rocking move ment of the movable pawl I4 about its pivot 58 determines the length of the spacing step, and it is dependent on the setting position of the abutment I 6 against which the pawl I4 strikes under the action of its spring I3. The pawl body II, therefore, immediately after the end of' its clockwise movement, Figs. 6 and 10,111 which the movable pawl I4 came out of engagement with the escapement wheel, returns to the position shown in Figs. 6 and 10 in which the fixed pawl I2 is again out of engagement with the escape-1 ment wheel I0, and the movable pawl' I4 is in engagement with said wheel. Since, however, meanwhile the movable pawl has been rocked about its pivot 58 to the extent of a single or a plurality of teeth divisions according to the position of the abutment IS, the movable pawl I4 engages a different tooth of the escapernent wheel I0, after the iixed pawl has again released the wheel I0, is rocked into its original position under the action of the escapement wheel which is under the tension of the carriage pull spring, and the spring I3 is tensioned, this position being shown in Fig. 13 in full lines andthe arm E39 then lying against the stop 60. The movable escapement pawl I4 thus permits a rotation of the escapement wheel Il! corresponding to the magnitude of its previous left-hand shift about its pivot 58, Figs. 13 and 14. The essential thing for obtaining a spacing step movement of the paper carriage is thus the known to-and-fro rocking escapement body II and the also known escapement pawls I2 and I4. To obtain a spacing ac-a tion, the body II must rock to and fro once about its axis 51.

v The individual end position of the pawl I4, i. e., the choice of the rst, second or one of the consecutive gaps according to the desired size of the steps of the movement of the paper carriage, is determined by the adjustable vabutment I5 against which the pawl I4 abuts under the action of spring I3. Abutment I6 is held by means of spring 41 in a position which corresponds to the shortest step of the paper carriage 6, i. e., to the smallest swing of the pawl I4; spring 41 is built considerably stronger than the spring I3 which acts on the movable pawl I4.

In the embodiment of my invention herein described, two sizes of steps of the paper carriage movement are shown, namely, a single and a double step, and the case ,shift is effected' by raising the whole paper carriage, but the invention is illustrated as applied to such a machine merely by way'of example.

All keylevers 25, viz., 25a, 25h, 25e and 25d transmission and intermediate members.

have support arms 21 by means of which tney are hung on a common shaft 26 extending across all key levers. The levers are swung around this shaft when the corresponding keys 28 are depressed against the action of the draw I springs 5I which are connected to the rear ends 28 of the key levers 25. All this is obvious from Figs. 1 to 5, inclusive.

, Fig. 1 illustrates the arrangement of key levers 25 and a conventional keyboard. yIn addition to l0 keys 28 for the individual characters, the back space 1I, the two case shift keys 10 and the case shift lock 12 are shown. The machine is further provided with one or several dead keys 28e which do not actuate the control mechanism.

On actuating the type key 28d the key lever 25d is rocked about the shaft 26, Hereby the type lever 64 is moved into striking position through-the links 6I, 62 and the bell crank 53, in which position the type strikes against the platen roller 1. During the striking movement of the type lever 64, a projection 65 thereon moves the universal bar 66 which extends transversely to the direction of the movement of all the type levers 64. The movement of the universal bar 66 is transmitted through a transmission member 81 jointed to the machine frame by means of an intermediate member 6d, to a projection 58 on the transmission member 61, which projection actuates a pin 50 on the pawl body II, in both case shift positions.. Thereby the pawl body II which is mounted on the case shift 'frame 2 is pivoted about the axis 51 (Figs. 13 and 14). The movement of the universal bar 66 and the parts' 61, 68, 6 9 connected thereto, also the rocking of the pawl body in clockwise direction in Fig. 15, take place against the action of springs, not shown in the drawings. which also eiect the returning movement when the type lever 64 returns to the initial position under the action of the key lever restoring spring 5I.

The case shift is effected by pressing the case shift key 1G. Hereby the case shift key lever 13 is rocked about a pivot pin 15 whereby a projection 14 on said lever raises the case shift frame 2 'along with the paper carriage 6 and platen 1.

In order to produce, besides the customary single length step, another of double length in one or both positions of the paper carriage, in the present ease and according to the present invention, three different types of abutment members are provided, each of which is exchangeably connected with an individual key lever 25h, 25e or 25d, whereas no abutment members are connected to the group of key levers 25a nor to the dead keys 28e. The arrangement cf these abutment members and their distribution over the individual key levers 25 may be made differently according to the dsired keyfboard without fundamentally changing the principles of the machine. Changes can easily be made, even on the fully assembled machine, if a diierent arrangement of characters on the type levers and on the key-board is desired because, for this purpose, only the abutment members associated with the individual key levers 25 need be exchanged. lAccording to the present invention, when typing, these abutment members influence the adjustable abutment I6 for the movable pawl I4 by means of The diierent possibilities of such influencing will be hereafter described individually.`

On depressing the keys 28a which are associn with additional abutment members.

atedwith characters of normal width, the escapement mechanism of the paper carriage is actuated in the conventional manner so that the carriage 6 in the upper and lower case shift position is advanced with the normal step width. The key levers 25a have the conventional form as is obvious from Fig. 2 and are not provided The movable pawl I4 is freed on swinging the pawl body II and is moved by the action of spring I3 from the position indicated by solid lines in Fig. 13 into the position indicated by dashes and dots in the same figure in which position it is held by the abutment I6 which is under the influence of spring 41.

'On operation of a key associated with a character of greater width, the movable pawl I4 is swung further from the position indicated by solid lines in Fig. 13 into the position shown in Fig. 14 so that a double stepis accomplished.

In order to obtain a double width step in both positions of the paper carriage with certain selective keys 23h, abutment members are mounted on the ends 2S oi the corresponding key levers 25h. In this case, these abutment member consist of screwed on or riveted on little plates 30h. n swinging the key levers 25h by operating the keys 28h, the plates 30h act in both case shift positions ofthe paper carriage on a transmission member, .rail or rod 32 which extends across all key levers 25 andis far enough away from the rear ends 23 of the key levers 25 to remain untouched by the ends 29 when the key levers 25a, 25e and 25d, whichhave no such little plates, are operated. As more particularly obvious from Figs. 6` to 12inclusive, the transmission member 32 is mounted on levers 34 which are fulcrumed at 33 to the machine frame I. Anarm 35 provided on one of the levers 34 is movably linked by a connecting rod 35 to one arm 22 of 'a setting device 20--2I-22 which is preferably crumed to the bolt 49. Upon operation of the transmission member 32 by means of the little' plates 30h of the key levers 25h, the elbow-lever 34-35 and with it the setting device 20-2 I-22 is moved counterclockwise (Figs. 6 and '7). With the air of the intermediate members I9, I8, 48, the abutment body I and with it the abutment I6 is swung from the position shown in Fig. 13 into the position shown in Fig. 14, whereby the desired double width step of the paper carriage 5 is obtained. Since the transmission member 32 with the levers 34 is rotatably carried by the machine frame I, only the positionk of the setting device 2li-2I--22 which is rotatably supported by the case shift frame l2 is changed with respect to the .elbow-lever 34-35 when shifting the paper carriage 6 with the platen 'I from the lower case shift position (Fig. 6) to the upper case shift position (Fig. Hereby the connection of lever arm 35 and setting device arm 22 is maintained by means of the connecting rod 36 which is movably linked to both parts. The arrangement of the setting device -2I-22 is such that it is not swung when'changing over from the lower case shift position according to Fig. 6 to the upper case shift position as per Fig. 10. The transmission member 32 retains its position in front of the abutment platesv 30h of key levers h in both case shift positions.

For such keys as are also freely selective and at the operation of which in the base or lower case shift position of the platen a single control step and in the upper case shift position Iof the platen a double step is required, the following arrangement is made.

Whenoperating the keys 28o, the abutment body I5 carrying the abutment I6 is operated only when the paper carriage 6 with the platen 1 is in the upper case shift position. For this purpose, extensions 3| (Fig. 4) are provided at the ends 29 of the key levers 25e, and to these extensions are linked labutment members e which have the shape of short rods. With their free ends, these rods 30o engage the apertures 4I of a transmission member 40 which has preferably the shape of an angle iron extending across all the key levers 25. The number of apertures 4I in the angle iron 4D is equal to the number of keys 25, so that connection is prepared in advance for all keys. levers 38 pivotally mounted on the machine frame at 37 (Fig. 6). One of the levers 38 has a free arm 39 which carries an abutment pin 42. When typing in the lower case shiftposition of the paper carriage, the abutment pin 42V which, at the operation of key lever 25, is moved in a counterclockwise direction( Fig. 6) by imeans of the abutment member 30e and the transmission member 40, moves over the free arm 22 of the setting device 2il-2I-22 as is obvious from Fig. 8. The abutment I5 is not moved when operating in the lower case shift position, and a single step advance movement of the paper carriage is eiected. When shifting the paper carriage into the upper case shift position (Fig. yl0), the free arm 22 of setting device 2li-2 I-22 is brought into the path of the abutment pin 42 so that, upon operation of a key 23C, the setting device 20--2I-22 is moved counterclockwise by means of the pin 42 as obvious from Fig. '11, and the abutment I6 for the movable pawl I4 is adjustedin the already described manner. The result of this is a double step when operating the key 28e and when the paper carriage ls in the upper case shift position.

A fourth possibility ofthe coordination ofthe width of the steps of the paper carriage and `the keys is that in the lowerlcast shift position double steps and in the upper case shift position single steps are obtained. Upon depressing a key 28d (Fig. 5) the abutment body-I5 carrying the abutment I5 is operated only when the paper carriage is in its lower case shift position. In order to accomplish this, theends 29 of the key levers 25d are provided with extensions 3|, and the latter with abutment members 30d. These members consist of rods, the free ends of which en-A gage in the apertures 45 of a transmission member 44 which extends across all the levers 25d and for which an angle iron is preferably used. The number of apertures 45 in the member 44 The member 40 is mounted on corresponds to the total number of key levers 25.

'I'he lever 43 is provided with` single step advance movement of the paper 'carfrom Fig. 9, and turns the setting devicel 2Il-2I-22 also counterclockwise. Hereby the abutment body I5 is operated in the manner already described and with the cooperation of the intermediate parts I9, I8, I1, 4B and, with it,

.the abutment I6 for the movable pawl I4 so that' in the lower case shift position and when depressing the keys 28d a double step of the paper carriage 6 is produced. In the upper case shii't position, the cross piece 2| of the setting device.

20--2I-22 which is carried by the case shift frame 2 of the machine is removed from the acting range of the projecting arm 46, as is obvious from Fig. 11, so that, in this position, the setting device 20-2I--22 and the abutment I5 are not iniiuenced when operating the keys 28d, and a riage 6 is produced.

The ends of the abutment members 30c and 30d extend so far into the apertures 4I, 45 of 'then members 4I), 44 that, when operating the members 40, 44 by one of the abutment members 30e, 30d, the ends of the other not operated abutment members 30e, 30d move longitudinally within the apertures 4I, 45 'and remain in engagement with the members 40, 44.

In order to assure an absolutely reliable and quickly acting adjustment of the movable pawl I4 at the various case shift operations and widths of steps of the paper carriage 6, the abutment body I5 carrying the adjustable abutment I6 for the pawl I4 according tothis invention is rotatably carried by the main pawl body II by means v of a bolt 49. In the single step position (Fig. 13) the abutment body I5 is held by means of spring 41 in a position which is determined by the abutment of a nose 52 provided on the body I5 against a pin 53 attached to the pawl body II. I'he double lever I8 which is also operated by setting device 20-2I-22 with the co-operation of connecting member I9 is also rotatably carried by the same bolt 49 attached to the pawl body II.

When operating certain keys, the abutment body I5 is operated against the action`of spring 41 by means of the' double lever I8, the free end I'l of which engages the pin 48 of the abutment body I5 in such a way that the abutment I6 is always in the plane of the movement of the movable pawl.,I4. This arrangement assures that faulty adjustments are avoided which could easily happen if it were necessary that an especial abutment be moved into the path of the movable pawl It and across the direction of the movement cf the latter. With the arrangement according to this invention, the abutment Iii reliably assumes the desired position at the correct moment, also when typing at highest speed.

In the position for double width steps, the movement of the abutment body I5 is limited by an abutment 54 provided on abutment body I5 which cooperates with the abutment part 55 associated with the pawl body II. The movable pawl I d is rotatably connected at 58 to the pawl body II and abuts, when in rest position according to Fig. 13, i. e., when the paper carriage standsv still, with one arm 59 on which the spring I3 also 'acts against the abutment 60 oi the pawl body II. In this position the movable pawl I4 is held by means of the escapement wheel I' which tries to turn the movable pawl I4 around the fulcrum 58 and against the action of the spring I3 associated with pawl I4 in clockwise direction (Fig. 13) under the iniluence of the draw spring for pulling the paper carriage. The pawl body II is revolvably carried in known manner by. the shaft 51 which is carried by the two arms I of the case' shiftframe 2.

While I believe the above described embodiments of my invention to be preferred embodiments, I wish it to be understood that I do not desire to be limited to the exact details of process,

- design and construction shown and described, for

obvious lmodiiications willoccur to a person skilled in the art.

I claim: 1. In a typewriter having a machine. frame, type carriers with diierent types thereon and means for case shifting the machine to print diff erent types; paper carriage escapement mechanism comprising an escapement wheel, a rocking spacing device carrying escapement pawls cooperating with said wheel, one of said pawls being Imovable to control the spacing distance, an ad- .instable abutment determining the movement of said pawl into different positions corresponding `to different spacing distances, a setting device for eiecting adjustment of said abutment, said setting device being movable relatively to the machine frame during case shifting without changlng the position of the abutment, key-actuated parts, and transmission means including actuator parts exchangeably mounted on selected key-actuated parts, said actuator parts being operative to actuate the setting device in such a manner as to change the position of said abutment and vary the spacing, and the transmission means also including a plurality of separately movable members each operated by actuator parts on different sets of key operated parts.

2. In a typewriter having a machine frame, type carriers 'with different types thereon 'and means for case shifting the machine to print different types; paper carriage escapement mechanism comprising an escapement wheel, a rocking spacing device carrying escapement pawls cooperating with said wheel, one of said pawls being movable to control the spacing distance, an adjustable abutment determining the movement of said pawl into diil'erent positions corresponding to diir'erent spacing distances, a setting device for eiecting adjustment of said abutment and movably mounted on the case shifting frame,

said setting device being movable relatively to j nism comprising an escapement Wheel, a rocking spacing devicecarrying escapement pawls cooperating with said wheel, one of said pawls being movable to control the spacing distance, an adjustable abutment connected to the'setting device by a link and determining the movement of said pawl into different positions corresponding to diierent spacing distances, said rocking spacing device including a pivotable frame in which the movable escapement pawl and the adjustable abutment means are pivoted, a setting device for eiecting adjustment of said abutment, said s'etting device being movable relatively tothe machine frame during case shifting without changing the position of the abutment, key-actuated parts, and transmission'means including actuator parts exchangeably mounted on selected keyactuated parts, said actuator parts being operative to actuate the setting device in such a manner as to change the position of said abutment and vary the spacing.

4. In a typewriter having a machine frame, type carriers with diierent types thereon mounted in said frame and means including a case shift part for case shifting the machine to print different types, paper carriage escapement mechanism comprising an escapement wheel, a rocking spacing device carrying escapement pawls cooperating with said Wheel, one of said pawls being movable to control the spacing distance,` an adjustable abutment determining the movement of said pawl into diierent positions corresponding to different spacing distances, a setting device for eiecting adjustment of said abutment, said setting device being movable relatively to the machine frame during case shifting Without chang- 5 ing the position of the abutment, key actuated parts. and transmission means including actuator parts exchangeably mounted on selected keyactuated parts and a plurality of separately mov'- able transmission members each operated by acf 1o tuator parts on diierent sets of key-operated parts, said actuator parts being operative to actuate the setting device in such a manner as to change the position of said abutment and vary the spacing, and said transmission members hav- 15 ing projections cooperating with the setting device one of which projections acts on the setting device only in one case shift position while at least one other projection acts on the setting device only in a different case shift position.

` WILLY EISELT.

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