US1275681A - Combined type-writing and computing machine. - Google Patents

Combined type-writing and computing machine. Download PDF

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US1275681A
US1275681A US79943313A US1913799433A US1275681A US 1275681 A US1275681 A US 1275681A US 79943313 A US79943313 A US 79943313A US 1913799433 A US1913799433 A US 1913799433A US 1275681 A US1275681 A US 1275681A
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computing
jacks
special
carriage
key
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Frederick A Hart
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UNDERWOOD COMPUTING MACHINE CO
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UNDERWOOD COMPUTING MACHINE CO
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06CDIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C11/00Output mechanism
    • G06C11/04Output mechanism with printing mechanisms, e.g. for character-at-a-time or line-at-a-time printing

Description

.F. A. HART COMBINED TY PE WRITING AND COMPUTIN MACHINE. 'APPLICATION FILED NOV. 6. 1913 1,275,681. Patented Aug.13,1918.
2 SHEETS -SHEET I.
14 g g y as HUN 1 'siliii ii F. A. HART.
COMBINED TYPE WRITING ANIJ COMPUTING MACHINE.
APPLICATION FILED NOV. 6. I913- 1,275,681. Patented Aug. 13, 1918.
2 SHEETS-SHEET 2.
INVENTQR. UM
AT'I'Ov NEY WITNESSES:
UNITED STATES PATENT OFFICE.
FREDERICK A. HART, OF NEWARK, NEW JERSEY, ASSIGNOR, BY MESN E ASSIGNMENTS,
TO UNDERWOOD COMPUTING MACHINE COMPANY, CF YORK, N. Y., A. CORPO- RATION OF NEW YORK.
COMBINED TYPE-WRITING AND COMPUTING MACHINE.
Specification of Letters Patent.
Application filed November 6, 1918. Serial 0. 799,433.
To all whom it may concern:
-Be it known that I, FREDERICK A. HART, a citizen of the United States, residing in Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Combined TypeWritin and Computing Machines, of WhlCh the fo lowing is a specification.
-My invention relates to computing machines, and is designed to be used with such machines as print the numbers registered and also at some time serve to print in some definite column some special character.
My invention is herein shown as applied to combined typcwriting and computing, machines of the Underwood-Hanson type, such for instance as that shown in the British Patent No. 3390 of 1912, in which the numeral keys of the typewriter, while printing on the'typewritercarriage, set up on computation members or rack bars the numbers thus printed, and from said computation members the numbers thus set up are later carried into the computing wheels of a totalizer. In such machines it is desirable to be able'to print some special sign, either in or ad aCent to the column 111 which the printing of the numerals is usually done.
Such a sign, for example, may be a star which can be printed only when the com? puting wheels all stand at zero. Such printing 0 the star will indicate on the printed recor that the wheels. then stood at zero.
This is especially valuable at the beginning and end of a computation when the accuracy of transcribing a total is proved'by subtracting it out of the computing Wheels, thus This is the Hanson machine.
Sometimes in writing on a Wide sheet it might happen that the operator would print the star at a point remote from the column in which the items and footings are being written, with the result that a reader might fail to associate the star so printed with the column of numbers.
In order to prevent such misplacing of the star on the Written record, the key for print ing said star may be normally locked, but may be automatlcally unlocked, whenever the typewriter carriage reaches a point related to the column in which'said star may be properly placed. Where such provision and unlocked by having its look under the' control of the denomination selector which determines at anymoment what computation member or rack bar might be effective to register a digit then being Written.
In the ordinary Underwood-Hanson machine, said denomination selector usually in cludes a tappct adjustable along a rod forming part of the typewriter carriage, said tappet being usually mounted in a block for convenience, and said block may comprise a cam which is-efiective to unlockthe star key. The connections between said cam and said star key may conveniently include a jack and a wire or rod extending from said jack to a bell crank connected to a lock controlling link, thus being analogous to the connectionsbetween the usual tappet and the usual computation members, which connections include denomination jacks and a Wire or rod extending from each denomination jack to its bell crank, which bell crank moves its computation member or rack bar into position so that the nui'neral keys will be effective to' set up or register digits therein.
The Underwood-Hanson combined typewriting and computing machine fre quently provided with several denomination selectors each. frequently set in a different plane from any -.otl1cr, so that each selector may cooperate with only one ofscveral sets oi denomination jacl s.' Where my invenlion is used. in connection with such a machine, a separate cam lock may be provided for the starprinting key of each set of jacks, and each key lock may be under the control of aspecial unlocking cam. Said cams for this purpose may be conveniently arranged in separate planes. so that each key-unlocking, cam may be efi'ective only on a redetermined key.
he star key printing mechanism may be of any usual or desired type. Other features and advantagcs ,will hereinafter appear.
In the accompanying drawings,-
Figure 1 is a sectional side view' of Patented Aug. 13, 1918. l
Underwood-Hanson combined typewriting and computing; machine, showing so much thereof as is convenient for illustrating my invention.
Fig. 2 is a plan view, largely diagrammatic, showing, the relation of the denomination selectors and the star keys.
type-bars print on said platen, said platen forming part oil a. trayeling carriage 6. As each type-liar 2 approaches, the platen, a heel 7 thereon strikes a universal member 8 to control the stepfby-steptravel of the carriage .6. For this purp ose dogs 9 are connected to be vibrated by'said universal memher 8 into and out of the teeth of. an csca e ment wheel 10, said escapement wheel eingconnected to a ratchetj'wheel 1.1 which meshes with a rack 12 connected to the typewriter carriage, so that as said carriage is drawn along by a spring barrel (not shown herein), it will be intermittently fed forward by said dogs 9.1
The carriage 6 may also include the usual column stop rack-bar 13 for positioning said earriageby cooperating with counterstops operated by tabulator keys (not shown herein). As said carriage 6 travels along, it moves computing, men'ibers or rack bars 14 MT/lLZ /"minto effective position so that digit pins 15 thereon will register the digits written bysaid keys, the digits so registered bein g later carried into computing wheels 16, which form a. totalizcr or coinputi'i-ig head.
The connections an; moving the eompn tation members 14- to effective position inelude a denomination selector or tappet 17 mounted in a. block '18. said blot-k being hirot-ed on a. rod '19 carried in brackets on the.typmvriter marriage (1. As said carriage travels along. it carries saidlappct- 17 under a series of jacks 20, and by raising" the front 'end of said jacks depresses the rear ends thereof so as to force down arrio/Ian wires or rods 21, ttt'll rod when t lepressed littingits computation member 14 so that the pins 15 thereon are within the range of movementot' pin-setling-jlinkages 22 operated by numeral keys l in a manner hereinalter described. The rods 21 liftsaid coinput-a'ti'on. members 14 through the usual r transposition devices 23, and when so lifted,
anyv key that is ileplessetl will swing itsp n-setti irgi" linkage 22, downward to setthe corresponding pin 15 on the computation member 14L. The connections for. accomtheir wheels 16 bythe lugs plishing this include a pendant 24 on each -numeral key, which, as the key descends,
strikes a rock arm 25 faston a rock shaft 26, which shaft, by means of a second rock arm' 27 thereon, swings downwardly its linkage 22, thus depressing or setting the pin on the computation member let. \Vhen a series of pins 15 have thus been set on the computation members 14, the digits represented thereby are carried into the computing wheels 1.6 by a general operator, which includes a cross bar 28 fast to side racks 29, and reciprocates forwardly and baekwardly in'such a Way that on its forward stroke it strikes any depressed pin and thereby drives its computation member 14 forward to an extent determined by the key depressed, so that its computing wheel .16 is turned by a rack 30 forming part of said computation member 14, said rack meshing with a pinion 31 on the computing wheel .16.
On the return stroke of the general operator the pinions 31 revolve idly, because of pawl and ratchet connections between them and their computing wheels '16. The general operator may be driven in any desired manner, as by the usual handdrrven segment 32 which meshes with an idle pinion 33, said pinion meshing with the raokbar29 which forms part of said general operator. 1
If all the computing; wheels stand, so as to display their zeros through the sight opening 314, a star key may be operated, unless otherwise locked, to print a star on the work sheet, thus indicating that all said wheels are at zero. Said star key 35, however, is normally held locked by means of annprig'ht pivot rod 36 which stands under the bottom of the head of the key 35. hen, however, all the computing wheels 16 stand at zero, a. hug 37 on each computing wheel brars-againsta cam tappet 38. Each tappet is pirotally mounted and drawn back a gainst. the computing wheel 16 by a spring 239. \Vhcu so drawn back, a link 40 attached to said tappet 3S draws the locking rod :50 into ett'ective position, said locking rodbeing connected to each ot' the links 440 by av piuand slot connection -ll so that,
unless all the lappets 38 are held clear of 37, one or more of the tappe t-s 38 will draw the locking rod 556 into locking position under the star printing key 35. hen. however, all the computing wheels stand at zero and hold all the ta.ppets 8 oi'itward, a lightspring 42 will swing the locking arm 36 to metlectiire position clear of the star printing key 35, thus permitting said printing .key to be de pressed.
Said key prints from a type-bar of the usual ki1i( l, '.which is com'iect-ed by the usual, bell crank 3 to a key lever 43 .said key lever 43, however, having thereon no" fiat key top, but being operated from the star printing key The connections between the key lever t?) and the star printing-key 35 include a rock arm 414., which is held up against the bottom of the stem 4-5 of the key85 by a spring 46. \Vhenevcr the star printing key 35 is depressed it swings the rock arm 44; downwurdly, thereby rocking in; rock sl'la'lt 4-7 to swing a second rock arm 48 lll'lil'fllll, so that said rock arm 48 will draw down the key lever 43. The connections between the rock arm 48 and the key lever 43 include a hell crank 4-9 having a pin and slot connection at 50 with the rock arm 48, while the other arm 51 of said bell crank overlies a lug 52 on a pendant 53 pi voted on the key lever the connections lacing such that whenever the bell crank 4-9 'peatcd by the star printing key 35, its a 1 draws down. the pendant 53, causing the star pe-har connected to the key lever 41* to print in the usual manner.
In order to prevent printing by said starkey except at some desired column as de- 1 mined by the jacks 20 and the blocks 18, said star key normally held locked by a bar or plate 54, which underlies its stem, said plate being moved to ineffective position when the typewriter carriage is in any column in which it may be desirable to have the star key print. Said locking plate 54 is controlled by a member connected to the denominationtappet 17, so that whenever said tappet is effective to cause computation at a given column the star key 35 will be unlocked in some corresponding column or letter-space.
To bring about this result, the block 18.
in which the tappet 17 is mounted, is provided with a cam 55 of such number of letter-spaces in width as it is desired to have the star key 35 operable in. Said width may be of any number of letter-spaces from one up to'or beyond the number of letterspaces in the computing column. As seen in Fig. 3, said cams 55 cover one lctteigspace more than the space of a computing column, and since, as viewed from in front as in Fig. 2, the locking jack 56 is the right-hand jack, said cams extend from, the dog 17 to the rightthereof. Whenever the typewriter carriage. in its? travel reaches the point in which it unlocks the star key 35, it does such unlocking by bringing the cam 55 under the front end of a jack 56 similar to the jacks 20, but having its forward end 57 extending into a plane beyond the tappet 17, so that said jack is separately operable by its cam When the front; end of said jack 56 is .raised, it depresses the'rea-r end, as shown ain Fig. 3, so' as, to press downwardly a nod 58 to rocka bell crank that the opposite arm 60 of said bell crank will move fiholocking plate 54 tolneftfective position, said arm and plate 54" being for this purpose connected by a link 61. Said block 18 forms a single member serving as a denomination selector and to control the star printing key.
\Vhcn the typewriter. carriage travels along so as to carry the cam clear of the jack 56. the locking plate 54 is returned to the effective position shown in Fig. 1 by a spring 62 which normally holds it in said effective position. The locking plate 54 is supported by ral'ibeted guides (33 on the machine frame, and has its throw limited by a pin 6% Working in a slot. 65 in a plate of the computing machine frai'ne.
It will heuotcd that all the jacks 20 and 56 forming one group, may have a common pivot 66, and that the rod 58 may be substantially identical with the rods 21.
As shown in Figs. 2 and the inventionis applied to a machine having three registers, three star keys. and three tappets 17, and three setsot' jacks 20. Each star key 35 is separately controlled by its own cam 55 corresponding to the tappet 1.7 of the set of jacks 2O belonging to its register on group of computing wheels 16. For this purpose the cams 55 are placed in different. vertical planes parallel to the travel of the typewriter carriage, so that thecam 55 controlling the left-hand star keyis completely in front of the path of the other two cams, and the other two cams likewise travel in paths clear of each other. cams 55, as best seen in Fig. 3, are beveled off at 67 at each end, so that the ends 57 of the special. jacks 56 will slide over them,
The tappets 17 are carried on pivots 68 in the usual manner, so that they slip idly out of the path of the acks 20 on the return. of the typewriter carriage. The blocks 18, as has been stated, are pivoted on a rod 19. and may be swung upwardly around said rod to ineffective position. When swung downward to effective position, the blocks rest at their rear ends on a supporting rod 69, said rod being provided with teeth 70 to mesh with teeth 71 on the blocks 18, thcreby holding said blocks in proper position.
Variations may be. resorted to within the scope of the invention, and portions of the improvements may be used without others.
Having thus described my invention,' I claim:- H 3 1. In a combined typewriting'. and computing machine, the combination with com .puting mechanism, of a'traveling carriage,
a special'printingtype, and a single "mem ber serving, as determined bysaiid'carriage duringits travel, as a denominational selector, and to control said special printing type. v
2. In a computing machina'tho combina- The tion with a traveling carriage, of computing -mec'ha nism, a special printing type, and a single member, serving, as determined by puting Wheels and a .denomination selector,
7 said maria?- key may be efi'ective.
4:. In a computing machine, the combination with numeral keys, computing Wheels and a traveling carriage, of. computation members on which numbers are temporarily set up, a series of jacks for selecting said computation members, a special printing key, a supernumerary jack Zefi'cctivc to control said special printing key, and a denomination selector clfectivc on said jacks adjustei'l with reference to all said acks when adjusted for any.
In a computing machine, the combination with computing mechanism, saidmechanism comprising a plurality of totalizers, each consisting of a group of computing wheels, of a traveling carriage, a single special printing type, and a member asso ciated with each totalizer serving in a manner determined by said carriage as a denomination selector and to determine in what column said special printing type may be ef fective.
6. In a combined typewriting and computing machine, the combination with 001m of a special printing key, alock for said special printing key under the control of a cam on a computing Wheel, and a lock for said key under the control of a cam on said denomination selector, said key being oper ative on the release of both said locks at the same time.
7. In a combined typewriting and computing" machine,*the combination with numeral keys and a. traveling carriage, of computing wheels,- a denomination selector, a special printingkey, a lock for said special printing key under the control of a cam on a computing wheel, and a lock for said key under the controLof a cam on said denomination selector, said key being operative on the release of; both said looks at the same time.
8. In a combined typewriting and computing'machine, the combinatlon' with com- .puting mechanism and a special printing type, of a denominational selecting block,
said block controlling the denominational "selection of said computing mechanism, and
puting machine, the combination with computing mechanism and a traveling carriage, of a series of denomination selectors on said carriage and controlling said computing mechanism, each selector effective only in. one plane, a special printing type, and a series'of cams on said denomination selectors in separate planes-for separately controlling said special printing type according to the columns determined by the travel of said carriage.
10. In a combined typewriting and computing machine, a denomination selector comprising a cam tappet effective in one direction only, and a locking cam efi'ective in both directions, said cams being positioned on said selector to be operative in the same computing zone.
1]. The combination with. typeivriting and computing mechanism, of a special prii'iting mechanism-for indicating a characteristic state of said computing ineehanisin and means for dominating said special printing. mechanism, said means coming into play solely in certain predetermined computing zones when such state of said computing mechanism exists, the predetermined zone or position of printing by a combined.
')l1.| rality of sets of jacks for controlling the.
denominational selection of cachset of computing devices, respectively, a. special print-.
11g type, and a plurality of blocks, each block controlling the denominational selection of its respective computing device by' its respective setof jacks, all of said blocks controlling said special printing type.
14:. In a combined typewriting and con1- puting machine, the combinationwith computing mechanism, of a series of jacks con trolling said computing mechanism as to denominational selection, a special jack formng part of said series of acks, a special printing type. and means controlled by said special jack for controlling said type.
15. Ina combined typewriting and computing machine, the combination with computing mcchanism, of a set of jacks for controlling said computing mechanism as to denominational selection, a traveling carriage, a block adjustable on said carriage, and a special printing type; said block controlling said jacks to select the denomination of the computing n'iechanism on the carriage movement, and also controlling said special printing type.
16. In a combined typewiiting and computing machine, the combination with a plurality of sets of computing devices, of a plurality of sets of jacks for controlling the denominational selection of each set of computing devices, respectively, a traveling cal riage, a special printing type and a plurahty of blocks adjustable on the carriage, each block controlling the denon'iinational selection of'its respective computing device, and all of said blocks controlling said spezo cial printing type.
17. .In a combined typewriting and computing machine, the combination with computing mechanism, of a set of jacks to control said computing mechanism as to do nominational selection, a block for acting on said jacks, and a special printing type, said type being under the joint control of said computing mechanism and of said block; I
18. In a combined ty ewriting and com: puting machine, the com ination with a plurality of computing devices, of a plurality of sets of jacks to control said computing devices, a plurality of blocks, one for each 5 set of jacks and acting'thereon to control said denominationgl selection, andatlspecial rintin t e sai ty e eing join y coniirolled by diuih of said blocks and each of said computing devices corresponding to the 40 particular block.
19. In a combined typewriting and com puting machine, the combination with computing mechanism, of a set of jacks to control said computing mechanism as to denominational selection, a special printing type,iand a block having two cams thereon,
one of said cams acting on said jacks to con- A trol the said denominational selection, and
the other of said cams acting jointly. with the computing mechanism to, control said special printing type.
20. In a combined typevvriting and com puting machine, the combination With, computing mechanism, 01' a series ot acks to control said computing mechanism as to denominational selection, a special jack form-- 'ing part of said sttries of jacks, a special printing type, and a block acting on said jacks to control said denominational selec-- 50 lion. and acting on said special Jack to control said special. printing type.
21 In a. combined typewriting and mum pLlClllg machine, the combination with computing-inechanism, of a set' of acks to con '5 'trol sanl computing mechanism to denomtype through the medium 0 being under the joint control of any inational selection, a special jack forming part of said set of jacks, a special printing type, and a block having two cams, one of said cams acting on said jacks to control denominational selection, and the other of said cams acting on said special jack to control said special printingtype.
22. In a combined typewriting and com puting' machine, the combination With compitting mechanism, of a set of jacks for con trolling said computing mechanism as to denominational selection, a special jack forming part of said set of jacks, said jacks and said special jack havin portions arranged in different planes, a Iwlock having cams a0 thereon, arranged in planes corresponding to the engaging portion of said jacks, and a special printing type, one of said, cams acting to control the denominational selection of said-"computing mechanism while acting in one plane, while said other cam controls said special jack in another plane, to conzrol said special printing type.
23. In a combined typewriting and com puting machine, the combination with com puting mechanism, of a set of jacks for controlling ,saidcomputing. mechanism as to denominational selection, a special jack forming part of said set of jacks, a special printing type, and a block having two cams 96 2 thereon, one of said cams acting to control said jacks one at a time to effect denominational selection, said other cam acting con tinuously on said special jack, during said denominational selection, to control said special printing type.
24. In a combined typewriting and computing machine, the combination with computing mechanism, of a block to control denominational selection, of said computing mechanism, a jack, and a special printin type, said type being under the joint contro of said block and said computing mecha-' nism, said block also actin to control said Isaid jack.
25. In a combined ty ewriting and computing machine, the com ination with a plurality of computing devices, a plurality of jacks, one corresponding to ,each com uting device a special printing type, said type computing device and its oorrespondin jack, and a plurality of blocks, one forveac computing device, said blocks controlling the (,lenominational selection of its corresponding computing device and also acting to set the corresponding jack. i
26. In a combined typewriting and computing machine, the combination-with com-' puting mechanism, of a block having two cams thereon, a special printing type and a :jack, said special prmting type being under the joint control of said com uting .mechanism and said jack, one of sai cams other of said cams acting to control the denominational selection of said computing n'nischanism.
,27. In a combined. type'writiug and com pnting machine, the combination with eomputing mechanism, of a oi jacks controlling said computing mechanism as to denominational. selection, a special-jack form-- ing part of said set of jacks, a specialprinting type, and a traveling carriage, said car-- riagecontrolling said computing mechanism. as to denominational selection through the medium of said jacks, and .:ontrolling said type through the "medium of said special jack.
28. In a combined typewriting and computing machine, the combination with computing mechanism, of a set of jacks controlling said computing mechanism to de nominational selection, a traveling carriage, a block adjustable on said carriage, and a special printing type, said type being under the joint control of said carriage and said computing mechann m, said carriage acting to so control said type through the medium of said block. v
29. In a combined typewriting and computing machine, the combination with com puting mechanism, of a set of jacks controlling said computing mechanism as to denominational selection, a traveling carriage, a block having two cams and adjustably supported on said carriage, and a special printing type, said carriage acting-through one of said cams to control said jacks, said carriage and computing mechanism acting jointly to control said type, thecarriage act ing to thus control saidtype through the medium of the other cam.
30. In a combined typew'riting and com-- )ut-in machine the combination with com- 21 7 v h puting mechanism, of a set 0i acks controlling said computing mecl'ianlczn as to denominational selection, a traveling carriage,
a block having two cams and adjustably. supported on said carr age, and a special print mg type, one of said cams acting (luring the carriage nmvement successively on said jacks, to control denominational selection. of SttlCl computing mechanism, said other cam being a contu'mous cam and actmgjomtly with said computing mechanism during the carriage moven'ientthrough the computing zone to control said-type, while the first cam is acting to enect .d'enominational selection.
31'. In a combined typewriting and computing machine, the combination With eomputing mechanism, of a carriage, a block adjustable on said carriage to control said computlng..mechamsm as to denominational selection, a ack, and a special printlng type, Said computing llltlCl'UHllHlIl and. Said blo I I" v a I acting ointly to control said type, said block in s0"control-hng said type .acting through the medium of said ack.
32. In a combined typewriting and computing machine, the combination with computing mechanism, of a traveling carriage, a block adjustable thereon, said block having two cams, bne of said cams controlling denomiuational selection of said computing mechanism, a jack, and a special prii'itii'lg,
type, said special printing type being under the joint control of said computing mecha nism and the other cam on said block, said other cam acting through the medium'of said jack. 1
33. In a combined typewriiiugand computing machine, the .comliiinalion with com" puting mechanism,'of a vtraveling carriage, a block adjustable thereon, said block having two cams, one oi said cams acting dursaid controlaeling through the medium of said zonal cam and jack during the time said first-mentioned cam acting successively to select the denominations.
34. In a combined typewriting'and computing machine, the combination with com,
puting mechanism, of a set of jacks 6011-,
trolling said computing mechanism as to denominational selection, a special jack form-' ing part of said set of jacks, a traveling carriage, a block adjustable on said carriage,
and a special printing type, said carriage acting through the medium of said block and said Special jack to control said special printing type.
In a combined typewriting and computing machine, the combination with a plurality of computing devices, of a plurality of sets of jacks to controlthe denominational selection of sald computing devices, respectively, speclal acks, one 'for inch set of jacks, andeach forming part..
oiisaid set of jacks, a traveling carriage, a
block for each set of and corresponding computing device, said blockseach havin g two cams thereon, and a special printing type, one of said cams on each block acting plurality of blocks adjustable thereon, one
on its corresponding set of jacks, to control' denominational selection, and the other one of said cams on each block acting on its corresponding s eial jack in each set, to control said special prlnting pe, the cams on each block being in pairs, but in different pluucs, the special jacks terminating in the plane ofit s corresponding cam, said planes being different for each column.
36. In a combined typewriting and computing niachine, the combination with computing IllrCIltlDlSHl, of a set of jacks controlling said computing mechanism as to de nominational selection, ing part of saidset of jacks, a traveling carriage, a, block adjustable on said carriage, and a special m-inting type, said special printing type being under the joint control of said computing mechanism and said cerriege, said carriage acting through the me dluni of said. block and said special jack to control said special printing 7. In a combined typeyvritingcomputing machine, the combination with a plurality of computing devices, of a plurality of sets of jacks to; control the clcnominational'selection of snicl computingdevices, respectively, special jacks, one for each set of jacks, and each formin pert of said set of jacks, a tmveling cm age, a plurality of blocks ailjuetable thereon, one block for each set of jacks and corresponding computing device,
a special jack formt mm f id (:{iII-IS 011. each block sold blocks each having two cams thereon,
and a special printing type, said special printing type being under the joint control of each of said blocks and said. carriage, acting on its corresponding set of geeks, to control denominational selection, and the other one of said crimson, each block acting on its con-e sponding special jack in'each set, in its joint control of saicl special printing type, the cams on each block being in pairs, but in different planes, the special jacks terminating in the plane of its corresponding cam, said planes being different f0 each column,
FREDERICK A. IIART, Witnesses TITUE H IRoNs, J' imiios Doonsrrr TE.
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Cited By (1)

* Cited by examiner, † Cited by third party
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US2655311A (en) * 1953-10-13 Automatic clear sign printing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655311A (en) * 1953-10-13 Automatic clear sign printing

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