US982517A

US982517A - Combined type-writer and computer.

Info

Publication number: US982517A
Application number: US39442707A
Authority: US
Inventors: Holmes Marshall
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-09-25
Filing date: 1907-09-25
Publication date: 1911-01-24
Anticipated expiration: 1928-01-24

Description

H. MARSHALL. GOMBINED0 TYPE WRITER AND COMPUTER.

APPLICATION FILED SEPT. 25, 1907.

Patented Jan 24,` 1911.

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IG Z [JVM/INTO@ MW MMM@ fr 7&57 gan/f MW v4HOLMES MARSHALL, 0F YORK, N. Y.

To alll uihomft may Be itrknown that L'Honmns MARSHALL,

i a citizen of ithe United States, residing at complish this by New York, in the county of New York Aand State of New York, have invented a certain new and useful Improvement in a Combined Type-Writer Iand Computer of which the following is a full, clear, an exactdescription, reference being had tothe accompanying drawings.

n combining a computing device withl a book-typewriter, it has been customary to mount the computing device on a horiz'ontal bar at the rear of the traveling typewriter carriage vand provide on thaty carriage a master wheel vwhich travels from order to order of the computer as the typewriter escapes for each character printed. `Such is the arrangement shown, for example, in Patent No. -820,879issued May 15th,.1906 to C. F. Laganke and J. A. Smith. In such embodiment, the figures on lthe computer wheels have necessarily been of small size,` for no greater width is allowedto the wheel than the width of one space on the typewriter. This makes the figures so small that, even thou h they are observed through a magnifying lens, the observation ,is frequently incorrect.

`One of the objects of this invention is to provide mechanlsm whereby there mayv be combined with the traveling carriage acomputing devicewhose wheels are wlder than the escapement space of the carriage. I acmechanism which gives the computin device a movement from right to left as te carriage escapes from left to right, so that the wheels onv the computer have a width equal to the sum of these movements and vthereby are much wider, and thelr indications 'more easily visible, than heretofore. v

Another object of the invention is to provide means enabling errors in the registration to be easily and` quickl corrected.

vrThe invention is hereina ter more fully explained and its essential characteristics set out inthe claims.

f The drawings show my invention as embodied with a typewriter ofthe Elliot-Fisher style, such as shown inPatent No. 820,879 referred to. y y

Figure 1 is avertical section throu h the keyboard-carriage' and its supporting rame; Fig. 2 is avsectional elevation on the line 2-2 of ig. .f1 looking toward the leftgFig. 3 is -Bpeciacation of Letters Patent. appunti ma september as, '1907. nsmal no. 394,421.

comentan TYPE-WEITERTAND COMPUTER.

Patented aan. 24, 1911.

a vertical section looking in the same directhe escapement mechanism; Fig. 4

tial-side elevation of the accumulator, showing the Vdials disconnected.

As shown in the drawing, rack which is a portion of thev open base which holds the aper to be printed; 1l is vthe Vintermediate Frame which 1s arranged to travel down the page over the rack 10; 12 is the typewriter carriage which is mounted to travel laterally on the frame 11. This carriage has/fin er keys arran ed in several banks as 13 and 14, connectef by levers 15 andvlinks 16 with the type bars 17. The type 18 carried by these type bars strike on top of the ribbon 19 and thus effect the printing.

The periodical escapement of the carriage from left to right a dlstance equal to a space for a letter or ligure is eilected by the following means: At the rear of the traveling carriage and mounted on the frame 11 is a rack 20. Meshing with this 21 on the shaft 22. This shaft is mounted inthe traveling carriage and has rigidly mounted on it an escapement wheel 23. Cooperating with this escapement are pallet levers 24 and 25 connected the rock shaft 27. A suitable rock arm on this shaft is connected with lever arms 29, which have cross bars 30 standing beneath pins 31 projecting rearward from the various key stems. This construction is more fully shown in t-he patent mentioned, to which reference is made for fuller description. The operation is, that whenever a key is depressed, its pin 31, through the mechanism described, rocks the pallet levers so that when the key stem returns, an escapement of one tooth is allowed the escapement wheelk23. This movement allows the tension spring to draw the carriage one space to the right.

Mounted on the traveling carriage is a master wheel 40, which is shown as provided with the pinion 41 meshing with the segment 42 which is pivoted at 43 and has teeth 44 meshing with'thertee'th on the segmental end 45 of a rock arm 46. This rock arm is rigid on the shaft 47 from which project arms 48 Which engage beneath other arms 49. Each of the arms 491s bent laterally at its front end and adapted to stand beneath the pins 31 of the corresponding numeral, key 14. The normallyidle disrack is a pinion y 10 represents a tance between this pin and the armv 49 varies according to the value of the numeral key, so that the full depression of such key rotates the master wheel an amount corresponding to the digit of the numeral key.

The master wheel, moving from left to right with the carriage, and being rotated in proportion to the numeral keys, is presented successively to the different orders of the accumulator or computing device and rotates these orders the amount of each digit added. The computing wheels or dials, which show the amounts and with which' the master wheel coperates, are designated 60. They are mounted side by side in a frame or casing 7 5 which is carried by the casing 61 mounted on the intermediate frame 11 at the rear of the typewriter. In this casing 61 is the carrying mechanism, conventionally shown at 7 4, and other parts of the computing device. The wheels 60 carry numerals on their peripheries which are adapted to be observed throughthe windowv 62. The accumulator mechanism may be of any preferred construction, as, for example, that shown in the atent referred to. It is provided with suitable means for carrying and for setting back to zero, the latter being indicated by the segment lever 63.

To enable the computing wheels to be Wider than the escapement space of the typewriter carriage, I mount the whole computer movably, and I provide mechanism for moving it to the left as the carriage moves to the right. Thus, in the embodiment shown, the computer case 61 is slidably mounted on the guide 64, the computer case having a dovetailed tongue 65 extending into a corresponding The guide is clamped to the horizontal bar 55 of the intermediate frame by means of a set screw 67. Secured to the computer case is the rack 68. This rack meshes with vthe gear 69 which is rigid with the pinion 70,

groove in the guide.

both being loosely mounted on the stud 71' projecting from the rear of the typewriter carriage. The pinion 70 meshes with the pinion 21 which is on the escapement shaft. It results from the abovev described construction, that when the carriage moves from left to right one s ace, the pinion- 21 turns in the right han direction and the pinion 7 O in the left hand direction a corresponding amount; `the gear 69, however, which moves with the pinion 7 0, is of greater radius, so that while the shaft 71 moves with the' carriage one space to the right, the uppermost teeth of the gear move considerably more than one space, to the left. In the embodiment shown, the ear 69 is a little more than twice the size o the pinion' 7 0, so that for each space which the carriage (and hence the shaft 71) moves to the ri ht, the uppermost teeth of the gear (an hence the rack 68 andthe computer) move to the left somewhat more of the page of paper may be used for than two spaces. This enables the computer wheels-to have a width over twice the size of the carriage escapement space, while for each escapement, the master wheel changes from engagement with one computing device to a similar en agement with the. next. Suitable adjustab e set screws 72 and 79 are provided to limit the movement of the com uting device in opposite directions.

ith my invention, the left hand porticlin orf inary writing of the letter keys; -then, as the tabulation portion of the page is reached, 4the gear 69 comes into mesh with the rack 68, the com uting device being then at its extreme rig t hand position, as defined by the stop` 79. When the gear 69 has meslied with the rack 68, for each space of escapement of the typewriter carriage, the computer is shifted to the left a considerably greater distance. The result is that the escapement following the periphery of the units column brings the computing device into its extreme left hand position against the stop 72, while the gear 69 moves out. of

YVengagement with the rack 68, allowing subsequent independent operation of the typewriter. e

After operation, the computer remains in its extreme left hand posit-ion until the carrivage is drawn back to the left, when the gear 69 rengaging moves the computer to the right, leaving it in its right hand position, as the gear clears the rack 68.

It will be noticed that the amount 'ot' movement ivenl to the computing device as the carriage makes each step, may be varied from that shown, to meet' the requirements of the particular machine. By this invention, one of the great objections'to mounting the computing device on tlie'intermediate frame is done away n with;l namely, the smallness( of the indicating characters, for the characters may, without difficulty` be made as large as desired.

One objection to the combined computing devices and book `typewriters now in the market is that it is very ditiicult to correct errors once made, and it has been found impracticable in this class of mechanism, to prevent errors being made. The operator strikes a wrong key or strikes the right key and gives it a blow of unequal force which often prevents the proper operation of the safety devices intended to reduce errors. Errors thus invariably get into the accumulator, and the customary way has been to simply keep track of the errors and correct the final result accordingly, on account of the difficulty of correcting errors once struck into the accumulator. This method is alwaysiincertain and undesirable.

In'my invention I have/devised a very simple arrangement by which corrections can be'made. I mount the dial wheels,.with

l erroihas been made,

out o which the master wheel coperates, in a cas, ing of` their own, designated 75, lwhich stands directly in front` of the main casing 61 of the accumulator and is pivoted tothe lower portion thereof at 78. In normal usage, the casing is held as if it were a art of the casing 61, by means of the latch liook T7 which engages a notch in the casing 75. In this position of the parts the dial' Wheelsengage on their rear and under sides with the carrying mhan'ism and other mechanism of the accumulator. Vhen an however, the typewriter cari'ia e is simply shifted to take the same range of the accumulator, and the thumblatch is disengaged from the casing 75, which is thereupon swung forward by the spring 76 as shown in Fig. 4. This releases the dials from any operative engagement with the rest of the computing device and the dials may be turned as desired by a pencil or stylus oint.

AThe release o the dials from the rest of the computing mechanism enables the oper ator, in case of striking the wrong key, to set that particular dial backward or forward to the position it would have had had the right key been Struck. vIn case the gure struck caused the computing device to carry and the figure which should have been struck would not have caused it to carry, or viceversa, he willsliift the adjacent wheel one tooth in the corresponding direction. When the correction has been made, the casing 75 is pressed rearwardly. and the spring catch 77 engages it and holds itin normal position.

Having thus described my invention, I claim:

1. The combination, with a series of digit carriers. of .a common operating device adapted to operate successively on the car` riers of lsuccessive orders, and mechanism for moving the' operating device from order to order and for automatically moving the digit carriers in the opposite direction.

2. The combination, with a series of computing wheels, of a master wheel adapted to be successively presented to the several wheels, means for moving the said master wheel in the direction from onel ordervto vthe next and for automatically moving the series of computing wheels in the opposite direction.

3. The combination of'a computing device having a series of wheels side by side, a master actuator with which such wheels may cooperate, and means for moving the master actuator in one direction and the computing device as a whole periodically in the opposite direction in defined steps.

4.' yThe combination of a computing device having a series of digit wheels, a master wheel, means for giving the master wheel varying fractions of a revolution, and means for moving the master wheel in the direction t from an order .to the next and for concurrently inovingthe computing device in the opposite directloii.

writer carriage, a mastefr wheel carried computer with' which the master wheel may coperate, mechanism for moving the coniputer to the left as the typewriter carriage moves to the right while the master wheel is in range of the computing device.A y

ecombination of a computing device, a typewriter carriage, a master wheel, an escapenicnt device for the typewriter carriage, and mechanism whereby said escapement moves the master tion andthe computing site direction.

7. The combination of a computing device having a series of wheels side by side, a master wheel, an escapement device for the master wheel, and mechanism whereby said escapement moves the master wheel in one direction and the computing device in the opposite direction, the distance from each computing Wheel to in the next computing wheel being equal to the sum of the movementsof the master wheel and computer for one escapement.

8. The combination of a typewriter hav ing an intermediate frame, and a laterally traveling carriage, an actuator mounted on the carriage, a computing device carried by the intermediate frame, and mechanism for moving the computing device toward the left as the actuator moves toward the right.

9. The combination of a typewriter having an intermediate frame and a laterally traveling carriage on which are mounted letter and numeral keys, an escapeinent device for the typewriter carriage, a. master wheel mounted on the carriage, operative -connections between the numeral keys and master wheel, a computing device carried by the intermediate frame, and mechanism for moving the computing device toward the left as the master wheel moves toward the right, said mechanism being controlled by the escapement of the typewriter carriage.

10. The combination of a typewriter having an intermediate frame and a laterally `traveling carriage, an actuator mounted on the carriage, means for moving the carriage, a computing device carried by the intermediate franie, and mechanisinfor moving the computing device toward the left as the actuator moves toward the right, said mechanism comprising racks on the computing device and on the intermediate frame and gearing journaled on the typewriter carriage and connected with said racks.

11. In a computing typewriter, the combination of a frame and keyboard carriage mounted to laterally move thereon, a rack carried by said frame, a pinion carried by 5. The combination of a traveling type-v thereby, means vfor-moving the carriage a4 wheel in one direc-v device 1n the oppothe corresponding pointv carriage mounted to travel thereon, a horizontal bar carried by the frame adjacent to the carriage, a guideway adjustably mounted on said bar, a computing device slidably mounted on said guideway, a traveling carriage mounted on said frame, an actuator mounted on the carriage andadapted to cooperate with the computing wheels, a rack depending from the front edge of the coniputing device, a stationary rack carried by the intermediate frame,'and gearing carried by the typewriter carriage and connected with the two racks mentioned.

13. The combination of an actuator, mechanism to cause it to travel step by step, a series of computing Wheels, each having a greater width than one of the steps of the actuator, and means for moving said com- Aputing wheels in the opposite direction to the travel of the actuator.

14. The combination of a typewriter, an actuator havin a travel corresponding to the travel of t e typewriter, a. computing device with which the actuator coperates, and which has wheels of a greater width than such typewriter travel, and means for moving the computing device in the opposite direction to the' travel of the actuator.

15. The combination of a ty ewriter having letter keys and numeral eys, a computing device, an actuator therefor, mechanism controlled by the numeral keys for giving varying movements to the actuator, and an escapement-controlled mechanism connected with both the computer and actuator and serving to give them concurrent movements iii opposite directions.

16. The combination of an accumulator having dials, a movable casing carrying said dials, and adapted to shift them out of engagement with the rest of the accumulator,v

and means for operating the dials.'

17. The combination of a frame, dials carried thereby, carrying mechanism, and means for holding the frame with the dials in engagement with the carrying mechanism, said means being movable to a position to free the dials from engagement with the -carrying mechanism.

18. The combination of a casing, dials carried thereby, carrying mechanism indean escapement device on thel pendent of the casing, means for holdin the casing with the dials in en gement wit the carrying mechanism, sai means being movable to a p osition to free the dials from engagement with the carrying mechanism,

and means for operating the dials.

19. The combination with a computing` device having a series of digit wheels, a master wheel for operating the digit wheels, carryin carrying mechanism whereby corrections can be made. y

20. The combination of a book t ewriter, a computing device carried by the intermediate frame thereof and having a series of digit wheels, a master wheel carried by the typewriter carriage wheels, carryin mechanism, and means or moving the digit wheels out of enga ment with the 4carrying mechanism, where y corrections can be made. n

21. The combination of a book typewriter, a master wheel carried thereby, a computing device adjustably carried by the book typewriter, said computing device comprising a'casing, car `ng mec anism therein, digit wheels carrie independently of said casing and adapted to coperate with the master wheel and the carrying mechanism or be out of engagement with both.

22. The combination of a book typewriter, a master wheel carried thereby, a computing device adjustably carried by the book typewriter, said computing device comprising a casing, carrying mechanism therein, a second casing pivoted to the casing rst mentioned and digit wheels carried by said pivoted casing and adapted to coperate with the master wheel and the carrying mechanism.

23. The combination of a book typewriter, a master wheel carried thereby a computing device adjustably carried by t e book typewriter, said computing device comprising a casing, carrying mechanism therein, a second casing pivoted to the casin irstmentioned, and digit wheels carried y said pivoted casing and adapted to coperate with the master wheel and the carrying ,mechanism, a sprin tending to separate the pivoted casing rom the main casing, and a. latch to hold such part-s together against the action of the spring.

In testimony whereo I hereunto aix my signature in the presence of two witnesses. HOLMES MARSHALL.

Witnesses:

Pmn P. BECK, Louis J. CA'ruN.

for operating the d1 't mechanism and means for moving the digit wheels out of engagement with the 7o