US1213100A - Combined type-writing and computing machine. - Google Patents

Combined type-writing and computing machine. Download PDF

Info

Publication number
US1213100A
US1213100A US63659311A US1911636593A US1213100A US 1213100 A US1213100 A US 1213100A US 63659311 A US63659311 A US 63659311A US 1911636593 A US1911636593 A US 1911636593A US 1213100 A US1213100 A US 1213100A
Authority
US
United States
Prior art keywords
keys
computing
carriage
latch
jack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US63659311A
Inventor
Frederick A Hart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNDERWOOD COMPUTING MACHINE CO
Original Assignee
UNDERWOOD COMPUTING MACHINE CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UNDERWOOD COMPUTING MACHINE CO filed Critical UNDERWOOD COMPUTING MACHINE CO
Priority to US63659311A priority Critical patent/US1213100A/en
Application granted granted Critical
Publication of US1213100A publication Critical patent/US1213100A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C21/00Programming mechanisms for determining steps to be performed by the computing machine, e.g. when a key or certain keys are depressed
    • G06C21/04Conditional arrangements for controlling subsequent operating functions, e.g. control arrangement triggered by a function key and depending on the condition of the register

Description

I F. A. HART.
COMBINED TYPE WRITING AND COMPUTING MACHINE.
APPLICATION FILED .IULY 3.19M.
Patented J an. 16, 1917.
w Q N M W/ n m a 1 m k a .e m Q v Q mn i Mam 2 Wmkvfifl K m M y B m: Nomws PEYERS co.. PHOYO-LITHQ. WASP,
F. A. HART.
COMBINED TYPE WRITING AND COMPUTING MACHINE.
APPLICATION mm JULY 3,19n.
1,21 3,100. Patented Jan. 16, 1917.
2 SHEETSSHEET 2.
lI/Zhz ewew; I [42 06926 021" rwa' I 7 2 a 4 UNITED s'rn'rns Parana ornion FREDERICK A. HART, OF'HAETFORD, GQHNECTICUT, ASSIGNGR, BY MESNE ASSIGN- IiIENTS, T0 UNDERWOOD COliIPUEING DIACHINE COlvIPANY, 0F KEV] YORK, N. Y., A
COBPQRATION OF NEW YORK.
Application filed m 3, 1
Y 0 all whom it may concern:
Be it known that I, FREDERICK A. HART, a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Combined which. the following is a specification.
This invention relates to computing- Inachines, particularly those of the Underwoodl ilanson type illustrated in'iny pending application No. 466,836, filed December 10, 1908, in which the keys of the typewriter control the setting of certain pins, and the pins afterward cooperate with the general operator to turn the adding wheels.
One of the principal objects of my invention is to provide simplified and improved means readily applicable to existing machines, for guarding against errors which arise from the liability of the operative to forget to attend to the operation of the general operator after said pins have been set for a number.
According to the present improvements, a locking bar is provided which is normally out of use, but which is automatically thrown into use at the operation of the key which sets the unit pin for any number, thus locking the numeral keys and preferably all of the ke s of the typewriter, so that new pins cannot beset up before the computing wheels have been operated to register the number previously set up on said'pins. Said locking bar is connected to said general operator to be released thereby,v so that when the niachineis properly operated, the lock moves automatically into and out of effective position, without interfering at all with the operation of the keys; but at any time when the operative forgets to attend to the general operator, after depressing the'numeral keys, he will be reminded oi the omission by finding that the keys of the type writer will not operate.
I r er" :ably employ the same bar that is used in the line-locking mechanism of the Underwood typewriting machine for looking the keys the completion of a line of writin and I so construct the machine that the usual function of said bar can be performed; while it is also thrown into effec- 0 position at the o}. tion of anyinuneral key to write a digit in the unitsplace in a Specification of Letters Patent.
Type-lV1-iti11g and Computing Machines, of
column of writing. I provide means normally under tension; for moving said bar from normal idle position to effective position; but said means are normally restrained by a latch; and I provide means controlled by the carriage of the typewriter for releasing said latch when the carriage is in a position. just succeeding the writing of the units digit of a number. Upon operating the general operator, the parts are restored to normal positions.
In the accompanying drawings, Figure 1 is sectional side elevation of an Underwood rianson combined typewriting and adding'machine, showing the present iinprovements applied thereto; the parts being in normal positions, and the keys free to operate. ig'. 2 is a diagram of the key locking parts in effective positions .at the writing of the digit in the units place in a column. Fig. 3 is a perspective rear view of th present improvements. Fig. l shows o strike upon the front side of a platen 6, which is mounted to travel upon a letterfeeding carriage 7, which is driven in the usual manner by a spring 8 and is controlled by letter-feeding devices connecting universal bar 9 actuated by heels 10 on the typebars, and forming part of a frame 11 which has vibrating supports 12 and actuthe usual letter-feeding. dogs 12 to control escapement wheel 12". Upon said carriage is a tappet 13, which is usually adir table along the rack bar 14, and has a cam edge to lift in succession jacks 1.5 arranged in. a row mounted upon a fulcrum 16. The denomination selector or tappet 18 may be made ineffective by swinging it on its mounting around the bar 13? as described in my co-pending application No. 466,836, cited aoove. he rear ends 17 of the jacks press Patented J an. 16, 1917.
s11. Scria1No.G36,593. y
down links 18 to vibrate levers 19, which are connected to linkages 20 to lift the rear ends of a series of denominational or order bars 21, whose forward ends carry racks 22 to mesh with pinions provided upon dial wheels El, whereby the latter may be rotated. The numeral keys 1 have stems 25 to operate arms 26 upon linkages 27 to depress any of a set of pins 28 upon the elevatcd rack bar. is the carriage feeds step-by-step, the rack bars 21 are elevated in successi n, and downwardlv from each one is projected a pin 28. The rack bars fall to normal posit-ions, thus bringing the depressed pins into the path of a cross bar 29 forming part of a general operator. The general operator, which also comprises a pair of arms 30 and a pair of racks 31 on opposite sides of the machine. is connected by pinions and segments to a shaft 3% which carries the operating handle After the pins are set up by the numeral keys 1 to register a number temporarily. the operative grasps the handle and the general operator is slid forwardly. the bar 99 engaging all of the depressed pins and driving forward the racks Q2 corresponding distances, to turn the dial wheels 24 accordingly.
Upon striking' a key 1 to print a digit in he units place in the column. and then re leasing said key. the carriage 7 advances one step, and the or pct 13 engages a special jack 36 placed at the end of the row of jacks and having a link 3. to engage arm 38 upon a rock shaft to rock the latter; said shaft carrying an upstanding arm L0 to which is pivoted the rear end of a latch 41. whereby said latch is withdrawn rearwardly from a tooth or shoul er formed on an upstanding rod 1- 3. vl .ch is then driven up by a spring -14. the latter connected to one arm 4-5 of a bell crank, and the other arm 4L6 of said bell crank carrying said rod In this up rard movement, the rod &3 strikes an arm l7 projecting rearwardly irom a rock shaft :18, which. in the Underwood typewriting machine, has arms L9, to carry a bar 51, swinging the same forward under hooks 52 formed on all the key-levers Hence when the paper carriage moves one step aft f the writing of a digit in the units place, the keys 1, 2 are locked. Fig. 2. The operator now grasps the handle 35 to move forward the general operator. and. a cam or shoulder 5% on the bar or lide 31 engages the lower end of an arm of a bell crank. comprising another arm 56 and mounted upon a rock shaft 57, and by means of a link 58 restores the bell crank 45, L6 to normal position, together with the lock-setting rod 43, permitting the usual spring 59 to restore said locking bar 51 to normal idle position. At the same time, a spring (30 connected to an arm 61 on rock shaft 39 restores the latter to normal position, together with the rod B'T'and jack 36.
As will be seen at Fig. 7, the nose (32 of the jack 6 is made very thin, and the tappet 13 is of such form that the jack 36 will be operated (Fig. '7) and released (Fig. 6) by the time the paper :arriage 7 completes its first letter-feeding movement after the writing of a digit in the units place; and hence the latch 2. after releasing the lock-operating bar i3, is caused by the spring to tend to i'e-latch said rod, so that when the latter is pulled down by the arm 56 and link 58, the latch l2 snaps into place to hold the rod 3 down in normal position. The link 58 is med with a slot (33 to engage a pin Gel. in said arm 56 to permit reciprocation of the general operator at any time, without obstruction from said link 58. The rock shafts 39 and 5?. and the bell crank may also be used for other purposes, as set forth in said application. After reciprocating the handle 35, and thereby throwing the locking bar 51 back to idle position, the operative may manipulate the keys 1 to set up pins for the next number, and upon the writing of a digit in the next units place the latch 42 will be again withdrawn, and the cycle of operations repeated. Thus, by simple means readily applied to the machine. errors arising from failure to manipulate the handle 35 are avoided.
By turning a button 63, the special jack 36 can be moved to a position to silence or disable the key-locking mechanism. This button is mounted upon the outer end of a stub shaft which is eccentric to the shaft 16 that carries the jacks 15; and on the inner portion of said shaft 64: is a stud G5 which normally is concentric with the shaft 16, and which, by rotation of the button (33 through a half revolution, is lifted almve the shaft 16, so hat the nose of the special jack 36 is raised too high to be engaged by the tappet 13. it will be seen at Fig. 5, that stud G5 abuts against the end of he shaft 16, which is suitably supported in av bracket or casing (36 independently of said stud (35. To hold the stub shaft where a djusted, a spring 67 presses ball 68 into a seat (39, formed in the stub shaft, said spring being held down by a screw 70, Fig. 1. The stub shaft may have depressions on its opposite sides, and these depres. ons may be connected by a shallow peripheral groove 71.
Variations may be resorted to within the scope of the intention, and portions of the improvements may be used without others.
Having thus described my invention, I claim:
1. In a combined typewriting and computing machine having a typewriter carriage, numeral keys and computing mechanism: an obstructing means for the keys comprising a device normally tending to obstruct said keys, a latch restraining said obstructing device, and means dependent on the movement of the carriage for releasing the latch.
2. In a combined typewriting and computing machine having a typewriter carriage, numeral keys, computing mechanism and a manually controlled general operator for running numbers into the computing mechanism; and comprising in combination,
a device normally tending to obstruct said keys, a latch restraining said obstructing device, means dependent upon the movement of said carriage for releasing said latch to 11 permit said device to obstruct the keys to mechanism; and comprising in combination,
a device normally tending to obstruct said keys to warn the operative to operate said general operator, a latch restraining said obstructing device, means dependent upon the movement of said carriage for releasing said latch, means controlled by said general operator for releasing said keys from said obstructing device, and a spring for returning said latch to the position where it is effective to restrain the obstructing device.
4:. In a combined typewriting and computing machine having a typewriter carriage, numeral keys, computing mechanism and a manually controlled general operator for running numbers into the computing mechanism; and comprising in combination, a bar for locking said keys at the end of a line of writing, an independent device normally tending to set said line-locking bar to operative position, said bar being movable to operative position independently of said bar-setting device, a latch restraining said bar-setting device, and means dependent upon the writing of a digit in the unit's place in a column for releasing said latch to permit said locking device to become effective to warn the operative to operate said general operator.
5. In a combined typewriting and com puting machine having a typewriter carriage, numeral keys, computing mechanism and a manually controlled general operator for running numbers into the computing mechanism; and comprising in combination, a bar for locking said keys at the end of a line of writing, an independent device normally tending to set said linelocking bar to operative position, said bar being movable to operative position independently of said bar-setting device, a latch restraining said bar-setting device, means dependent upon the writing of a digit in the units place ina column for releasing said latch to lock the keys to warn the operative to operate the operator, and means dependent upon the movement of said general operator for replacing said bar-setting device under the control of said latch.
6. In a combined typewriting and computing machine having a typewriter carriage, numeral keys, computing mechanisn'i including computing wheels and a general operator for rni'ming into the computing mechanism numbers set by said keys; and comprising in coi'nbination, a row of jacks, one tor each wheel, connections whereby the general operator operates the wheels selected by said jacks to an extent determined by said keys, a jack-setting device depend ent upon. the movement of the carriage, a special jack following the units jack in said row, means normally tending to lock said. keys, a latch normally restraining said locking means, and means connected to said special jack for releasing saidlatch to lock said keys and thereby notify the operative to operate the general operator.
7. In a combined typewriting and computing machine having a typewriter carriage, numeral keys, computing mechanism including computing wheels and a general operator for running into the computing mechanism numbers set by said keys; and comprising in combination a row of jacks,
one for each wheel, connections whereby the general operator operates the wheels selected by the jacks to an extent determined by said keys, a jacketting device dependent upon the movement of the carriage, special jack following the units jack in said row, means normally tending to lock said keys, a latch normally restraining said locking means, means connected to said special jack for releasing said latch to lock the keys to warn the operative to operate the operator, and means controlled by said general operator for restoring the key-locking devices to normal positions to reset the parts for a new computation.
8. A combined typewriting and computing machine having a typewriter carriage, numeral keys,computing mechanism and manually controlled general operator or running numbers into the computing mechanism; and comprising in combination a de vice normally tending to lock said keys against action, a latch restraining said looking device, means dependent upon the movement of said carriage for releasing said latch to lock said keys thereby notifying the operative to operate the general operator, and means controlled by said general operator for releasing said keys from said locking device to reset the parts for a new computation; said general operator being operable independently of said key-locking and releasing means when the latter are in nor mal posit-ions.
In a combined typewriting and computing machine, the combination with a carriage and numeral keys controlling said carriage, of computing mechanism including a general operator and also including a denominational row of members, a jack following the last of said denominational row of members, a line locking bar for said keys, a spring for normally holding said bar in ineitective position, a device to set said bar to effective position, a spring tending to opcrate said bar-setting device, a latch normalty restraining said bar-setting device and a connection from said latch to said jack to operate the latch for the purpose of making said locking bar etltcctive to warn the oper ative to operate the general operator.
10. In a combined typewriting and computing machine, the combination with a carriage, numeral keys, and means to control said carriage by said numeral keys, of a computing mechanism including a general operator and also including computing wheels, a denominational row 01 members, one for each said wheels, a jack following the last of said denominational row of members, a line lock bar for said keys, said bar normally held in an ineli'ective position, means to set said bar to an inell ective position, a spring tending to operate said bar-setting means, a latch normally restraining said spring and said bar-setting means, a bell crank connected to said latch, and a link connecting said bell crank to said jack, whereby said jack may release said latch to permit tie movement of said bar to a position in locking engagement with said keys.
11. In a combined typewriting and computing machine including a letter-feeding carriage and type-operating keys, the combination with computing devices including i denominational members controlled by said carriage, of means dependent upon the movement of the carriage to lock said keys, said locking means including a part shiftable at will to a position to disable said locking means while the denominational members still remain active.
12. In a combined typewriting and computing machine. the combination with a carriage and numeral keys having means to control the same, of computing mechanism including temporarily registering devices and a manually controlled general operator and also including computing wheels or devices turned by said operator to an extent determined by said registering; devices, and a row of denominational members, one for each wheel, a jack following the last of said denominational row of members, means normally tending to lock said keys, a latch normally restraining said locking means, means connected to said jack for releasing said latch to warn the operative to operate said operator, and means to set said jack to ineffective position and hold it there.
13. The combination with means for temporarily setting up a number, computation accumulating means, means for transferring the numbers set up to said accumulating means, obstructing means for preventing further setting up of a number when the last digitof the number has been up, means normally tending to shift said obstructing means to obstructing position, a latch for restraining said shitting means and means brought into action by the tem porary setting up mains for releasing said latch.
14. In a combined typewriting and computing machine, the combination with a earriage and numeral keys having means to control said carriage; of computing mechanism including computing wheels and a row of jacks one jack for each wheel, a special jack fol owing the units jack in said row, a jack setting device dependent upon the movement of the carriage for operating all of said jacks, a device for obstructing said keys, and means controlled from said jack setting device and acting through the medium. 01"- said special jack for controlling the effectiveness of said obstructing means.
15. In combined typewriting and computing machine, the combination with a carriage and numeral keys controlling the same, of computing mechanism including a general operator and also including computing wheels and av row of jacks, one jack for each wheel, a special jack following the units jack in said row, a jack setting device dependent upon the movement of the carriage for operating all of said jacks, a device for obstructing said keys, means con trolled by said jack setting device and acting through the medium of said special jack for rendering said obstructing means effective, and means controlled by said general operator for rendering said obstructing device ineffective.
16. The combination with means for temporarily setting up a number, computation accumulating means, means for transferring the numbers set up to said accumulating means, obstructing means for preventing further setting up of a number when the last digit of the number has been set up, means normally tending to shift said obstructing means to obstructing position, a latch for restraining said shifting means, means brought into action by the temporary setting up means for releasing said latch and means for restoring said latch to operative position brought into action by transfer 'ing the number set up to the accumulating means.
17. In a combined typewriting and computing machine, the combination with a carriage and numeral keys controlling the same, of computing mechanism including computing'whcels and a row of denominational selecting jacks one jack for each wheel, a special ack following the units jack in said row, a jack setting device dependent upon the movement of the carriage to operate all of said jacks, a key obstructing device controlled by said special jack, and means to set and hold said special jack in ineffective position in respect to said jack setting device while said device is still effective on said denominational jacks.
1.8. The combination with a computationaccumulating means, of computation-registering means, a general operator for transferring an accumulated computation from the former to the latter, numeral keys for setting up a computation in said computation-accumulating means, a lock for said numeral keys, said general operator having a cam thereon, a bell crank engaging said cam, and means connected to said bell crank for enabling the release of said lock on a movement of said general operator to run up an accumulated computation.
19. The combination with computation accumulating means, of computation-registering means, a general operator for transferring an accumulated computation from the former to the latter, a series of numeral keys for setting up a computation in said co-mputation-accumulating means, a lock for said numeral keys, said general operator having a cam shoulder thereon, a bell crank engaging said cam shoulder, a link having a pin-and-slot connection with said bell crank, a second bell crank connected to said link to be actuated thereby, and a rod engaging said lock to determine the effectiveness thereof, said rod being moved to release-said lock when said general operator moves to run up an accumulated computation in said registering means.
20. In combined typewriting and computing machine, the combination with tam-- porary registering means, of computationaccumulating means, means for transferring temporarily registered computations from the former to the latter, a series of typewriter keys for actuating said registering means, a traveling typewriter carriage, a jack, a carriage normally controlling said temporary registering means and said jack during a portion of its movement, means for locking said keys against actuation after all. the digits of a number have been registered in said temporary registering means and before they have been run up in said accumulating means and means for making said jack ineii ective at will even though the temporary registering means is still eilectivo by said carriage during said portion of its movement.
21. The combination with a traveling carriage, of temporary registering means, computation-accumulating means, means for transferring a temporarily registered computation from the registering means to the accumulating means, series of jacks actuated by said carriage for controlling the action of said temporarily registering means, series of numeral keys for setting up num bore in said temporary registering means, and a jack alongside said first-mentioned jacks and operated. by said carriage to lock said keys against actuation after all. the jacks in the series have been actuated to temporarily register a number set by said keys and before said number is accumulated.
22. The combination with a series of computing wheels, of a series of numeral keys, temporary registering means actuated by said numeral keys for registering a computation digit by digit, means for running up all the registered digits of a computation concomitantly in said computing wheels, a lock universal to said keys, a traveling carriage, a denomination selector on said carriage, a series of jacks forming part of the computation devices, and operated by said selector and a jack also operated by said selector as said carriage passes from the column in which the units digit is written, said jack being connected to actuate said lock.
23. In a combined typewriting and computing machine, the combination with temporary registering means, of computationaccumulating means, a general operator for transferring temporarily registered computation from the latter to the former, numeral keys for setting up a number digit by digit in said temporary registering means, a lock for said numeral keys operable by the typewriting mechanism, means forming part oi the computing mechanism and normally tending to actuate said lock, and a latch for holding said last-mentioned means against actuation, during the operation or" said temporary registering means.
2a. In a combined typewriting and com puting machine, the combination with temporary registering means, of computationaccumulating means, typewriter keys, means for transferring a temporarily registered computation from the former to the latter, a lock effective on said keys for notifying the operative that all the digits of a numher to be computed have been registered and not run up in said accumulating means, means for automatically releasing said look as an incident to the running up of a numher in said accumulating means, and means for rendering said lock ineiiective so as to prevent the same from acting when a registered number has not been run up in said accumulating means.
25. In a combined typewriting and computing machine. the combination with computing wheels, a single set of numeral keys and a traveling carriage, of a denomination selector forming part of said traveling carriage and determining how said keys shall be effective on said wheels, a lock for said keys, a device for automatically making said lock effective controlled from said denominational selector when a key has determined how the units computing wheel shall be operated, and means for silencing said lockcontrolling device at will, while leaving said selector tree to control said wheels.
26. In a combined typewriting and conr puting machine, the combination with numeral keys, computing wheels and a traveling carriage, of a denomination selector controlled by said carriage for determining how said keys shall be effective on said wheels, means whereby said denomination selector may be set to ineffective position, an obstructing means for said keys, a device acting through the medium of said selector :tor auttanatically making said obstructing device etfective when a key'has cooperated with said selector to determine how the units wheel shall operate and means for making said obstructing device ineffective at will independently of the selector, whereby in any column on the work-sheet, computation may be rendered effective or ineffective at will and key locking may be also rendered effective and ineffective at will independently of the computing operation.
27. In a combined typewriting and computing machine, the combination with alphabet and numeral keys and computing wheels of a traveling carriage, hooks connected to said keys, a line-locking device cooperating with said hooks to look all of said keys, means controlled from said carriage for rendering said line-locking means effective when a key has determined how the units wheel shall be operated, and means for rendering said carriage control ineifeo tive on said line-locking device while leaving said device free to operate in the usual manner at the end of a line.
28. In a combined typewriting and computin machine, the combination with a line-locking device for the typewriter, of a denomination selector for the computing device, means whereby said selector controls said line-locking device, and means for making said selector ineffective on said linelocking device without altering its effective ness as a selector.
2). In a combined typevvriting and computing machine, the combination with a line-locking device for the typewriter, of a denomination selector tor the computing mechanism, alatcn forming part of the computing mechanism normally holding said line-locking device ineffective, means controlled by said selector for releasing said latch, and means for making said latch-releasing means inelfective at will.
30. In a combined typewriting and com puting machine, the combination with a line-locking device for the typewriter, of adenomination selector for the cmnputing mechanism, a latch forming part of the computing mechanism normally holding said line-locking device ineffective, means controlled by said selector for releasing said latch, means for making said latch-releasing means ineffective at will, a general oporator for forming part of said computing mechanism, a cam forming part of said general. operator, and a bell-crank operated by said cam for putting said line-locking de vice under the control of said latch.
31. The combination with numeral keys, of a traveling carriage cont-rolled thereby, automatic means controlled by said carriage for locking said keys when a number has been completely registered thereby, means controlling said locking means locatable at a. point intermediate the limits of travel of said carriage, and settable means for making said automatic carriage controlled means ineffective.
32. In a combined typewriting and computing machine, the combination with a carriage and numeral keys having means to control said carriage, of computing mechanism, a series of jacks forming denominational devices operable successively by said carriage, a supernumerary jack and means connected thereto and operable by said carriage for obstructing the operation of the keys.
33. In a combined typewriting and computing machine, the combination with numeral keys and computing mechanism controlled thereby, of means for obstructing the operation of said keys brought into action wnen a number has been completely set up by operation of a sufficient number of keys, operating means for said obstructing means and means sett-able at will for rendering said operating means effective or ineifective on said obstructing means.
FREDERICK A. HART.
Witnesses J. N. THORNTON, HOLMES h'LxnsHALL.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.
US63659311A 1911-07-03 1911-07-03 Combined type-writing and computing machine. Expired - Lifetime US1213100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US63659311A US1213100A (en) 1911-07-03 1911-07-03 Combined type-writing and computing machine.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63659311A US1213100A (en) 1911-07-03 1911-07-03 Combined type-writing and computing machine.

Publications (1)

Publication Number Publication Date
US1213100A true US1213100A (en) 1917-01-16

Family

ID=3280993

Family Applications (1)

Application Number Title Priority Date Filing Date
US63659311A Expired - Lifetime US1213100A (en) 1911-07-03 1911-07-03 Combined type-writing and computing machine.

Country Status (1)

Country Link
US (1) US1213100A (en)

Similar Documents

Publication Publication Date Title
US1213100A (en) Combined type-writing and computing machine.
US2422103A (en) Duplex calculating machine
US2058922A (en) Computing machine
US2088662A (en) Accounting machine
US1280065A (en) Combined type-writing and computing-machine.
US1190287A (en) Combined type-writing and computing machine.
US1626889A (en) Adding and listing machine
US2570931A (en) Printing tabulating mechanism
US836130A (en) Adding-machine.
US1804232A (en) Combined typewriting and computing machine
US1442576A (en) Combined typewriting and computing machine
US630053A (en) Computing-machine.
US1387711A (en) Combined typewriting and computing machine
US1225810A (en) Combined type-writing and computing machine.
US1275528A (en) Calculating-machine.
US763692A (en) Adding and recording machine.
US2311866A (en) Combined typewriting and computing
US1794464A (en) Combined typewriting anb computing machine
US1416464A (en) Combined typewriting and computing machine
US1078358A (en) Adding-machine.
US1278458A (en) Combined type-writing and computing machine.
US1323857A (en) Assigjstob
USRE12296E (en) Reissued dec
US1294727A (en) Combined type-writing and computing machine.
US1275681A (en) Combined type-writing and computing machine.