US1913892A - Tyfjswriting and calculating machine - Google Patents

Description

June 13, 1933. 5, 52

TYPJSWRITING AND CALCULATING MACHINE Filed July 12 1928 .3 Sheets-Shem.

Invenfor:

GusTav Mez.

7 anion,

June 13, 1933. G. MEZ

TYPEWRITING AND CALCULATING MACHINE Filed July 12 1928 3 Sheets-Sheet 2 June 13, 1933. G. MEZ 1,913,892

TYPBWRITING AND CALCULATING MACHINE Filed July 12 1928 5 Sheets-Sheet 3 82 M f I! as i 711; I /*M n 73 Patented June 13, 1933 UNITED s'rA'r Es' PATENT OFFICE GUSTAV IEZ, PM NEAR BERLIN, GERMANY, ASSIGNOR TO MERCEDES B'U'ROIASCHICKEN-WERE AKTIENGESELLSCHAFT, 0F BENSHAQ'SEN, GERMANY muwmrme m cancumvrme magnum Application filed July 18, 1928', Serial No. 892,075, and in Germany July 29, 192 7.

This invention relates to an appliance for the optional skipping of the comma lock in typewriting and calculatin machines.

n typewriting and calcu ating machines it Es customary to lock the writing and calculating keys in the comma. position of the counting mechanisms in order to prevent the introduction of values. This locking however has been found e'xce'edingly inconvenient when making calculations in which the commas are in some cases not written, since the operator, when working rapidly, is liable to overlook the fact that the comma place is in the operative position, and, when the calculating key locks, he only becomes aware, after a glance at the indicating device, of the fact that a calculation in this position is impossible and that the space bar must be depressed to feed the carriage forward.

This disadvantais obviated accordin to the present invention owing to the fact at a member arranged on the vertical countingmechanism and controlling the locking of the calculating keys through the medium of a feelin member, at the same time controls the loose eed tooth that determines the advance of the carriage, and by means of this member the carriage can be caused to skip a plurality of steps. This controlling is only effected when actuating the numeral calculating keys, as the feeding of the carriage remains unchanged during the actuationoi the numeral griting keys and also of the letter writing gne constructional form of the invention is illustrated by way of example in the accompanying drawings, wherein Fig. 1 shows a side elevation of a typewriting and calculating machine, in which certain parts of the frame are shown broken away in order to'disclose other parts of the apparatus,

Fig. 2 shows a front elevation of the machine shown in Fig.1 looking in the direction of the arrow A in Fig. 1, and

Fig. 3 shows a view of thecarriage lock shown in Fi 1, looking in the direction of the arrow B 1n Fig. 1.

Fig. 3a is an enlarged, fragmentary view looking in the direction of thearrow B of .key and the parts operated thereby in operative position at the moment when the .cou- L pling operating the counting slide is opened.

11 a frame 1 are arranged in a known manner a front carriage rail or. way rod 2 and a rear carriage rail or way rod 3, upon which the carriage'5 and the cylinder 4 are hori zontally displaceable in a known manner.

On the carriage 5 is arranged'a rail 6, by which vertical counting mechanisms 7 and 7 are carried in a known manner.

The carriage 5 is constantly urged from right to left, as seen in Fig. 2, by a known carriage-traction spring, not shown. When a writing key T 1s depressed, the traction hook T is brought by a tappet lever T arranged on the writing key lever T into en-, gagement with a cam shaft T, which revolves continuously in the direction of the arrow, whereby the traction hook T is moved against the action of a spring T Since the traction T which is oscillatable about the point T the lever T is deflected in a clockwise direction, and by means of its pin T it brings the type leveit8 into contact with the cylinder 4. Under these circumstances the lug 8a on the type lever 8 acts upon the universal bar 86, which deflects the lever 803, which is rotatably mounted about a point 80, in an anticlockwise direction. By this means a rod 8e pivoted to the lever 8d is moved in the direction of the arrow 8f, in which case it deflects against the action of the spring 8f, a carriage swing 82', which is oscillatable about the point 8g, and 8k, and on which a loose carriagefeed tooth 82 and a fixed carriage-feed tooth 82] are arranged. If'the carriage swing 811 is rocked counter-clockwise in the direction of the arrow 8f- (Fig. 1) by the movement of the hook T is pivoted at the point'l to a lever V rod 8e the loose feed tooth 82 is brought out of engagement with its lug 82a while the fixed feed tooth 82f is already in engagement with the ratchet-wheel 83 before the loose feed 5 tooth 82 is disengaged. A feed of the carextent clockwise until it bears with its edge 86 against the block 81. The loose feed tooth then occupies the position shown in Figure 3a i. c. it is located with its lug 82a opposite the next tooth space 87 and it occupies this position when the type lever 8 strikes against the cylinder 4. When the type lever 8 returns to its position of rest shown in Figure 1, the swing 871 also returns to its position of rest (Fig. 1) under the action of the spring 8f whereupon the fixed feed tooth 82; is brought out of engagement with the ratchet wheel 83 while the loose feed tooth 82 engages with its lug 82a in the tooth space 87 i and since the ratchet wheel 83 secured on the rotatably mounted axle 83a is rotated by the carriage tension spring (not shown) over the rack 835 secured on the carriage 5 and the toothed wheel 830 secured on the axle 83a is rotated in the direction of the arrows indicated in Figures 3, 3a and 3b, the tooth 88 of the ratchet wheel 83 bears .on the lug 82a of the loose feed tooth 82 and rocks it out of the position shown in Fig. 3a into the position shown in Fig. 3, whereby the carriage 5, 6 (seen in Fig. 2) is moved one step to the left.

v The block 81 is provided with bosses 81a and 81b and is slidably but unrotatably mounted on the journal 810 secured in the swing 8d. The block has a pin which is embraced by a bifurcated slot of the lever 78 ads. ted to rock about the point 79. The lever 8 has play in its connection at the point 79 so that when the swing 8i oscillates the said lever is adapted to participate in the swinging movement. There is secured on the upper end of the journal 810 a bracket 81d to which the already mentioned spring 84 is susnded. There is also connected at the point 8a of the lever 78 a lever 76 which may be moved in the direction of the arrow 7 6a hereinafter described.

It is obvious that in connection with the said movement or displacement of the lever 7 6, the block 81 will be lifted over the lever 78 out of the position shown in Fig. 3a into the position shown in Fig. 36 wherein it bears with its boss member 81a against the bracket 81d. If a type lever 8 now strikes against the cylinder 4, the loose feed tooth 82 will swing out under the tension of the spring 84 until it bears with its member 86a against the block 81, as is shown in Fig. 36. It will swing out to such an extent that when the on and rock it about its pivot to such an type lever 8 returns to its position of rest, the said loose feed tooth 82 will not be able to drop in the next tooth space 87 of the ratchet wheel 83 but in the tooth space 89 of the ratchet wheel 83 so that it enters into engagement with the tooth of the ratchet wheel 83. Consequently, it is readily obvious when comparing Figures 3a and 3?) that the ratchet wheel 83 will permit the carriage 5 to move two carriage steps. On the front of the typewritin machine is fixed the calculating mechanism y its rear wall 9, which carries all the calculating mechanisms, as shown in Fig. 1. In the two side walls 1a and 11) (Fig. 2) of the frame 1 is journalled the driving shaft 10 for driving the calculating mechanism.

This driving shaft 10 is continuously rotated in the direction of the arrow 13 by a continuously rotating motor 11 through the medium of a suitable worm drive lodged in a casing 12, a ratchet wheel 14 mounted fast on the shaft 10 also participating in this rotation. Such a ratchet wheel is provided for each of the ten calculating keys 15.

The calculating-key levers 16, are rockable about a pivot 17 in the machine frame and are normally held in the position of rest, shown in Fig. 1, by a spring 20 attached at one end to a hook 18 on the lever 16 and at the other end to a stationary hook 19. Th normal position of rest is determined b the hook 18 bearing against an abutment edge 21 fixed on the machine frame. If the key 15 is depressed, and the lever 16 thereby rocked about its pivot 17 in a clockwise direction, it releases with its free arm 16a the lug 23a of a pawl 23 which is slidably arranged on a clutch disc 22, which is rotatably arranged on the shaft 10, and the pawl 23 is accordingly displaced, under the action of a compression spring 24 actin upon it, in the direction of the arrow 25, an its lug 26 comes into engagement with the continuously revolving ratchet wheel 14. By this means the disc 22 corresponding to the key that has been depressed, is coupled to the ratchet wheel 14 and therefore to the shaft 10, so that it participates in the rotation thereof. When the key 15 is depressed or the pawl 23 released by the key lever 16, a locking bar 28 slidably arranged thereon by means of a rivet 27 and of the pivot 17 is simultaneously oscillated with it, whereby its lug 29 comes out of engagement with the abutment ledge 21. As a result of this the locking bar 28, under the pull of a spring 30 attached at one end to it and at the other end to the key lever 16 slides in the direction of the arrow 31. Under these circumstances its lug 29 passes underneath the abutment ledge 21, as shown in Fig. 5, and holds the key 15 in its depressed position, while the lug 28a formed thereon moves into the path of rotation of a lug 23a formed on the pawl 23. Shortly before the completion of one complete revolution of the row 31. The key 16"can consequently-M turn, under the action of the spring 20, into its normal position, shown in Fig. 1. striking against the locking bar 28" the pawl 23 is at the same time brought out'ofengagement with the continuously revolving ratchet wheel 14, and thereby the cam disc 22 is stopped. When the key lever 16 returns'to its position of rest, the lug 28a of the locking member 28 releases the lug 23a of the pawl 23 and immediately thereafter the lug 23a of the pawl 23 bears on the arm 16a of the key lever 16, whereby all-partsagain occupy their position shown in Fig. 1. s The passage of the lug 23a of the pawl 23 from the lug 28d of the locking member 28 on to the arm 16a of the key lever 16 is so short that the pawl 23 cannot drop again in the ratchet wheel 14. \Vitheach cam disc 22 controlled by the calculating keys 1'6 is'associated a valuerproducin'g member 32, which is shown broken away in Fig. 1 for the purpose. of better illustration of-the parts helonging tothe invention, and is designated 16 in the patent application Serial No. 632,- 480, of April 16, 1923, now Patent 1,862,240. It is kept constantly in power-transmitting connection with the cam disc 22 by a tension spring, which is designated 18a in said patent application, attached to the member 32, by means of an anti-friction roller 33 arranged at its lower end. During the rotation of the cam disc 22 the value-producing member 32 therefore travels downwards in consequence of the construction of the curve, under the action of said spring whereby the value corresponding to the key depressed is brought into the counting mechanism 7 located in the working position, in a known manner which is described in detail in said patent application No. 632,480, and at the same time, by the action of a pin 32a, designated 34 in said ap lication fitted tothe value-producing member 32, is caused to press upon the associated key lever T It is obvious from the above that the valueproducing member 32 is always pressed downward by the action of the spring not shown and will, therefore, tend to actuate the cam disc 22 in the direction of the arrow 13 in the position shown in Figs. 1 and 5. Since the spring, not shown, is considerably stronger than the spring 30'acting on the locking member 28 and the "spring 30 is' stronger than the spring 24 acting on the pawl 23, the efi'ect will be attained when the lug 23a of'the pawl 23 bears on the lug 28a oft-he locking member 28, according to Fig. 5, that the latter with its lug 29 will brought out of engagement with the ledge 21 and held even when the key 15 is held in the depressed position. If the key 15 is then re leased and the lug 23a of the pawl 23 released by the lug 28a of the locking member 28, the camdisk 22 will be further rotated in the direction of the arrow 13 by the spring (not shown) engaging on the value-producing By member .32, whereby the parts again occu y the relative position shown in Fig. 1. I a key 15 is struck, only one rotation of the cam disk 22 takes place regardless of the fact whether the key 15 is immediately released again or held in the depressed position.

' The apparatus hitherto described is known in all its parts and has only been briefly summarized for the better elucidation of the invention.

Underneath the calculating ke. levers 16, which are oscillatably supported about the pivot 17, is arranged a rocking member 34, which is supported in small bearing brackets 37 and, 38 fixed to the shaft 17 and the ledge 21 and arranged to left and right inthe machine frame, by means of journals 35 and 36 formed on the said rocking member, as shown in Figs. 1, 2, and 4 and is held in the position illustrated in Fig. 1, by a spring not shown. On the left-hand side of the rocking member 34 is formed a pin 39, to which is attached a connecting rod40, which is pivotally connected at its other end by a pin 41 with a lezver 42, which is oscillatable about the pivot l To the free arm of the lever 42 is fitted a roller 43, by means of which it can act upon a rod 44. The rod 44 is provided at its lower part with a longitudinal slot 45, in which a screw extension 46 engages and thereby guides the rod 44. At its upper end the rod 44 is guided by virtue of the fact that by means of a lug or flap 48 formed thereon projecting through a slot 47 into the calculating mechanism it is pivotally connected b a screw 51' with a lever 50 which is rotata le about a bolt 49 on the-machine frame. The lever 50 is normally held by the weight of'the rod 44 in the position shown in Fig. 2.

To the machine frame is pivoted by means of a-screw 52 a lever 53 which is normally pulled by a spring 54 against an abutment 55.

counting mechanism. vThe position which the lever 53 occupieswhen engaging in a recess, is shown in Fig. 2.

- If a calculating key 15 is depressed, the

key lever 16 deflects about the pivot 17 in a be clockwise direction. Owing to this the'lug 18 formed thereon strikes against the rocking member 34 and rocks the latter in a clockwise direction. This rocking movement is transmitted by the connecting rod 40 to the lever 42 so that the same is deflected in a clockwise direction. 4 During this deflection the roller 43 arranged on the lever 42 acts upon the rod 44 and raises it. The rod 44 thereby rocks the lever 50 about its pivot 49 .n a clockwise direction. This rocking movement can however only take place whenthe lever 53 is not projecting into the path of oscillation of the lever 50, that is, when the lever 50 is rocked by the action of the bar (a of the vertical counting mechanism 7 in a clockwise direction in such a way that it comes out of the operative position in relation to the lever 50. This however is only the case when a counting position of the corresponding vertical counting mechanism is in the operative condition. In the other case the lever 53 lies in the path of oscillation of the lever 50, as illustrated in Fig. 2, whereby a deflection of the lever 50 and therefore 9. raising of the rod 44 is prevented. In this way an oscillation of the lever 42 and of the rocking member 34 and therefore a depression of a calculating key 15 is prevented.

The position illustrated in Fig. 2 shows the left-hand side wall of the vertical counting mechanism in the working position of the machine. Now if the next counting position of the vertical counting mechanism is to come into the operative condition, the carriage is moved one step to the left by striking the known space bar L, in which case the projecting part 7d formed on the bar 7a runs on to the lug 56 of the lever 53 and thereb oscillates the latter against the action of t e tension spring 54, so that now the lever 53 sets free the lever 50. v

Hence a depression of the calculating keys 15 can only take place when a counting position stands in the working position but not when a side wall stands in the working position. If a comma position comes into the operative position,the lug 56 of the lever 53 enters one of the recesses 7 b and likewise locks the calculating keys. The same thing also, happens if the right-hand side wall enters the working position of the machine.

Upon a comma position of the counting mechanism entering the working position of the machine, the calculating keys 15, in the constructional form described above, are

therefore locked against depression. In order topass from the comma position into the next calculating position of the counting mechanism, it is necessary, as known, to strike the comma key, or, if the writing of the comma is not desired, to strike the space bar. The latter method of working is however a waste of time, inasmuch as the operator must first pay attention to the locking of the cal- In order'to obviate this loss of time a device is provided b means of which the machine can be so a justed that the paper carriage or the counting mechanism does not first remain in the comma osition at all but skips it at once. This is e ected by means of a device hereinafter described, which is controlled from the vertical counting mechanism, and which influences the loose carriage feed tooth cooperating with the ratchet wheel in such a way that after the striking of a calculating key in the counting mechanism position located at the left-hand side of the comma a double-carriage step is effected.

In order to'attain this, there are arranged on the bar 7a, which serves for controlling the lockin lever 53, forwardly projecting lugs 7w an 7 m which are located in the vertical lane of the counting mechanism positions Focated on the left beside the existing comma positions. With these lugs there cooperates a feeling lever 57 which is pivoted to the machine frame by means of the same screw 52 as the lever 53, and is constantly urged in an anti-clockwise direction by a spring 58, so that in its position of rest it bears against a stationary abutment in 59.

In the front wall 0 the calculatin mechanism is rotatably sup rted an adjusting knob 61, which is rovide with a pointer 60 and at the rear end of which is fixedly arranged a lever 62, which has a rearwardly projectin flap or lug 63. This flap 63 is provided wit a bore, in which a rod 64 is so supported as to be slidable in an axial direction and is held by a spring 65 constantlv in a definite position in relation to the lever 62 and its flap 63. A pin 66 arranged in the rod 64 bears from the rear against the fla 63, against which there bears on the other side the spring 65, which at the other end constantly urges a disc 68, which is secured to the rod 64 by means of a in 67, in the direction of the arrow 69. T e rod 64 is slidably supported at its left-hand end in a hole 70, shown in Fig. 2, in a bell-crank lever 72, which is oscillatably arranged on the machine frame by means of a screw extension 71.

The bell-crank lever 72 is connected by means of the rod 73, with the bell-crank lever 75, which is oscillatably arranged on the rear part of the machine by means of the bolt 74, a rod 76 being pivoted by means of a bolt 77 to a rearwardly projecting arm of the bellcrank lever 75. The rod 76 is pivotally connected at the point 78a, as shown in Figs. 3a and 3b, with a lever 78, which ,is rotatably supported on the machine frame at its ri hthand end at the point 79, and with its ree fork-shaped end embraces a pin 80 on a raising block 81.

The method of operation is as follows If for example the hundreds-of-thousands a calculatin carriage carrying the counting mechanisms springs one step to the left, so that the tens-of-thousands osition of the counting mechanism moves lnto the wor g position of the machine. If a calculating ey is again struck, for instance the key corresponding to the value 2, and the carriage feed takes place accordingly, the thousands .position of the counting mechanism moves into the operative position. Under these circumstances the lug a: at the same time runs up on to the feeling lever 57 and rocks it against the action of the tension spring 58 attached to it, in which case the said feeling lever 57 acts upon the rod 64 with the downwardly projecting flap or lug 57a formed on it. B

this means the rod 64 is shifted to the le t and thereby moves out of the hole 70 in the lever 72 into the path of movement of the extension 44a of the rod 44. If a calculating key is now struck. again, for instance the one corresponding to the number 5, the amount is reckoned in the known manner. During this procedure the upwardly traveling rod 44 strikes with the shoulder 440: formed thereon against the rod projecting into its path, and moves the latter upwards, whereby a rocking of the bell-crank lever 7 2is brought about m an anti-clockwise direction. This results, b means of the connecting rod 73, in a rocking of the bell-crank lever 75about the pivot 74, whereby the rod 76 in its turn israised, and through the medium of the lever 78 effects the raising of the raising block 81 into the lposition shown in Fig. 3b.

Owing to this t e loose feed tooth deflects until its edge 86a bears against-the raising block 81, as shown in Fig. 3?), this oscillation corresponding in am litude to two teeth of,

the ratchet wheel, so hat upon the shoulder 8a of the type lever 8 striking against the universal bar 86 a springing of the carriage is effected not merely through one carriage step but through two carriage steps. Hence the carriage or the counting mechanism springs directly from the thousands position into the hundreds position, skipping the position of the comma. The lever 57 is then released again by the cam 72:, so that under the influence of its spring 58 it returns to the position shown in Fig. 2. By this process the flap 57a. also sets free the rod 64, so that it is pulled by its s ring out of reach of the shoulder 44a of the rod 44, whereby also the raising block 81 falls under the-influence of the' gintrinsic weight of its rod gear into the normal position shown in Figs. 3 and 3a.

If-in the further course of the calculation the. counting mechanism then passes from the tens into the units position, the lever'57 is similarly deflected, as described above, by the pin 7%, and the rod 64'is displaced towards t e left into the path of the shoulder 44a of t e rod 44, so that then, upon the calculating key being struck in the units position, the raising block 81 is raised in the manner described above and a double carriage step is again; thereby brought about. Hence the counting mechanism together with the carriage, springs directly from the units position into the first decimal place, skipping the decimal point.

By providing a, correspondingly d per In 7 av on the counting mechanism and a secon higher shoulder 44?) on the rod 44 the raisin block 81 can be raised so high that the feed tooth 82 can swing right out, so that a threefold step ofthe carriage is brought about and a jumping is possible from the lowest position of one counting mechanism 7 into the highest position of the next counting mechanism 7 As has already been mentioned above, the adjusting knob 61 is rotatably supported in the front wall of the calculating mechanism. Normally it occupies the position illustrated in Fig. 2, in which the pointer 60 fitted to it points to the indication with period skip- If however the knob is rotated in such a way that its ointer points to the words without period skipping, the lever 62, which is rigidly connected with it, is at the same time oscillated, whereby the rod 64 is brought out of the path of the lever 57.

ping.

The possibility is thereby given of suspend-- 44, is only operative when striking the calculating keys 15, while when striking the normal writing keys T by hand it is completely inoperative, as in this case no movement of the rod 44 occurs. The counting mechanism or the lugs formed thereon can act upon the lever 57 during the running of the carriage in the usual manner without the raising block being afiected in any way, irrespectively of whether the knob is adjusted to with period skipping or to wlthout period skipping. Thus if the operator passes from the numeral keys 15 to the writing keys T, nothing special. need be done to render inoperative the double-step or comma-. skipping device, but this device remains inoperative, for the reasons hereinbefore set forth, when the writing keys are struck.

What I claim is 1. A typewriting and calculating machine including numeral calculating keys, numeral writing keys and a counting mechanism having a controlling member wherein-when operating the numeral calculating keys at the comma position a skipping of the carriage is automatically released by the cooperation of the controlling member on the counti mechanism characterized by the fact that when using numeral writing keys the controlling member remains inoperative on the means effecting the skipping of the carriage, 2. A typewriting and calculating machine including numeral calculating keys, numeral writing keys, a carriage, space skipping mechanism including a loose tooth and controlling means therefor and counting mechanism, a controllin member associated with, the counting mec anism, and a coupling member establishing connection between the numeral calculating keys and the loose tooth controlling means upon operation of the controlling member.- f

3. A machine as claimed in claim 2 in which the coupling member is adjusted by mechanism actuated by the numeral calculating keys, which mechanism also forms a part of a locking mechanism for the calculating machine, said locking mechanism being rendered effective during space skipping operation of the carriage.

4. In a typewriting and calculating machine, a movable carriage, a carria e controlling member, a key operated mem r, a carriage operated slidable connectin rod between said two members, and carrying means for said rod manually operable for rendering said connections between said two members inoperative.

In testimony whereof I have signed my name to this specification.

GUSTAV MEZ.

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