US2478630A - Power-operated printing machine - Google Patents

Description

Aug. 9, 1949. L. B. HILL POWER-OPERATED PRINTING MACHINE Filed April 14, 1945 6 Sheets-Sheet l Laurence BJ/z'll NVENTOR ATTORNEY w wm Aug. 9, 1949. L. HILL 2,478,630

POWER OPERATED PRINTING MACHINE Filed April 14, 1945 -6 Sheets-Sheet 2 Laure/ice 3.17 17! g INVENTOR ATTORNEY Aug. 9, 1949. v B. HILL POWER OPERATED PRINTING MACHINE 6 Sheets-Sheet 5 Filed April 14, 1946 Laure/wee 5. Hill INVENTOR ATTORNEY Aug, 9, 1949. L. B. HILL POWER ,OPERATED PRINTING MACHINE 6 Sheets-Sheet 4 Filed April 14, 1945 ATTORNEY M a a o Filed April 14, 1945 6 Sheets-Sheet 5 Aug. 9, 1949. I L 5, HM; 2,478,630

POWER OPERATED PRINTING MACHINE IIIIIIIIIII laurel: ce Z. Hill ATTORNEY Aug. 9, 191 9a L 2,478,630

POWER OPERATED PRINTING MACHINE Filed April 14, 1945 6 Sheets-Sheet 6 la laurence .BJz'ill ATTORNEY Patented Aug. 9, 1949 POWER-OPERATED PRINTING Laurence B. Hill, Syracuse, N. Y., assignor to L. C. Smith & Corona Typewriters; Inc., Syracuse, N. Y., a corporation of New York Application April 14, 1945, Serial No. 588,351

7 Claims. (01. on-17 l The invention relates toimprovements in power operated printingmaohines, the general purpose of the invention-being to provide an improved power mechanism for actuating one or more elements of such printing; machines as typewriting machines, listing or printing calculating machines,-and the like. Such printing machines commonly; include provisions -ior facilitating the printing of matter in tabular form, and a further purpose of the invention is to provide improved power actuated tabulating' means suitable for such machines. y l t Another purpose ofthe invention is to provide an. improved;key-controlled power mechanism for actuating an"operation effecting e m nt f the machine in response to opposite strokes of the control key; J :Hji V: i V y A Another purpose of the invention is to provide an improved powermechanismwherein actuationof each of a plurality oifoperation efiecting elements bya common power driven actuator is effected, I 1: :1 'i :i' 4;;

.,Another, purpose of the invention is to provide a'simple and eflicientpower mechanism for moving an operation eiiecting element in either of two opposite directions from a normal position and restoring said element to normal position. I

Other purposesandadvantages of the invention will appear from the following description of:.the embodiment of the invention in a tabulating mechanism for a typewriting machine shown in the accompanying drawings.

In the drawings: 7 y 7 a I Figure 1 is a fragmentary top plan view of a typewriting machine in-normal idle condition equipped with the improved'power mechanism, certain parts being broken away and others omitted for clarity of illustration of features of the power mechanism, and only so much of the known features of the machine being shown as is required for a clear understanding of the improvements; i

Figure 2 is a fragmentary front elevation of the power mechanism in its normal idle condition with certain elements omitted and others broken away for clarity of illustration of features of the mechanism; i

Figure 3 is a vertical sectional view on the line 3+3 of Figure '1, with the parts in normal idle condition;

Figures 4, 5 and 6 are detail vertical sectional views on the line 4+4 of Figure 2 showing certain parts of the mechanism in different stages of activation thereof;

Figure 7 is a detail sectional view similarto Figure 3, but showing one of the frame-carried tabulator stops being held in its set or active positiomn v, a r 1 I Figure 8 ma detail sectional view onthe line 8-8 of Figure 9, showing the carriage braking means in active condition; J I f p Figure 9 is a' detail sectional view on the line 3-9 of Figure 10;

Figure 10 is aview similar to Figure 8, showing the carriage braking means in its normal inactive condition; x

Figures 11 and 12 are detail views taken o'n the line 3-3 of Figure 1, showing respectively innormal and fully shifted positions, and on an enlarged scale, one of the set of peration effecting elements and its asso'ciatedinterponent which are operative by the rotati'veactuatorto selectively actuate the frame-carried tabulator stops;

Figure 13 is a sectionalview'on line l3|3 of Fi re t Figure 14 is a detail se' uonal viewon line 4 l 4 of Figure 1, showing the'setting andunsetting means for the carriage-carried tabulator stops in normal positionwith one of the stops unset .to its inactive position; f p

Figures 15 and 16 are views similar to Figure 14, showing successive stages of the operation of the mechanism to set acarriage-carried stop in its active position of Figures 7, 15 and 17;

Figure 17 is a detail sectional view on line I 'I-l 1 of Figure 1, showing the setting and unsetting means for the carriage-carried tabulator stops in normal position with one of the stops set in its active position; and U .7

Figures 18 and 19 are views similar to Figure 17 showing successive stages of the operation of the mechanism to unset a carriage-carried stop to its inactive position of Figures 2, 3; Hand 19' The known features of themachine will first be described. Thestationary framework or main frame designated as a whole by the numeral l0 supports the working parts of the machine. The usual roller platen II is journaled in the platen carriage l2 which is mounted as usual on the frame to travel back and forth transversely of the machine. The carriage is urged from right to left by the usual motor spring I3 attached at one end to .and wound about a stationary stu-b shaft l4- held to the framework, the other end of the spring being attached to the spring-driven drum I5. The draw band I6 is wound about the drum, and is attached at one end to the drum and at the other end to the carriage to constantly exert a-pull toward the left on the-carriage. The hub Ifia of the drumis confined between an external letter space the carriage when-the rocker 22is actuated by known means not shown. Dog 23 is normally engaged with wheel lfi'and is movable relatively to the rocker 22 to free the carriagefromcontrol of the dogs for running orjumping tabulating movement of the carriage from rightto left.- To move the dog 23 relatively to the rocker to release the carriage for tabulating movement, there is provided the known bellcrank lever 25 pivotedon framework Ill, at 25a, with onearm of the lever overhanging the dog 23 in'the normal position of the dogrockenand with the other arm of the lever connected by thelink 26 with' an arm 21 which is adjustably held by known'means to rock in unison with'an' escapement release bail; The known bail has" its side arms 28 pivoted at 29-29 on the frame to swing fore andaft of the machine and is located substantially medially of the right and left hand sides of the machine; The side arms of the bailare connected at their lower ends by a cross bar. 30'and are also c'onnectedadjacent their upper ends by a stiffening or reinforcing bar 3|. I V

Ten fore and aft slidable decimal tabulator stops 32 (only some of" which are'shown) are mounted on the framework l0 adjacent therear of the machine substantially medially of thesides of the machine and arearranged'side by side as usual for arresting the carriage at either of ten immediately successive letter: space positions depending upon which one of said steps is projected to active position. ,Stop's 32iarereciprocalsubstantially fore and aft of the machine in ten slots 33a formed in a block 33 forming part ofxthe stationary framework of the machine, the stops being held up in thejslots by a r'etainiiig bar 34 held to block-33. Theseistop s; as will appear hereinafter, serve as counterstops for carriage: carried stops 4| later described;

Ten upstanding operating levers 35 are provided for sliding the stops 3 2 totheir inactive and active positions, each lever 35 being positively connected with a different stop, and the levers beingrguided in a comb I54 fixed tojframework H]. The stops in their'inactive positions abut, as shown, at their rear ends, apart of framework It which serves to limit retraction of the stops: Each lever-35 has a rounded upper end'portion 35a rockably seated in a notch 32a in its associated stop, portions 3511 being guided in th'e slots 33a in block 33, and allof the levers 35' being'loosely pivoted intermediatetheir ends" on'a horizontal pivot rod 31' fixed to framework It, and extending transversely of the machine. fi'p rings 38 are connected to the levers 35 and to framework III to constantly urge the upper arms of the levers toward the rear of the machine and to normally yieldingly hold the stops 32'; retracted to inactive position. A spring 39 i eqnneeted with framework I0 and with arm 2'l to normally yielding ly hold the cross-bar 30 of the bail 283fl-3| against the rearedgesof levers 35 adjacent the lower ends of the levers. and to yieldingly hold the bellcrank lever 25 slightly outof cbntact'with 4 escapement dog 23. A light torsion spring 48 is connected with the framework I0 and bellcrank lever 25 to assist in restoring said lever to and holding it in its normal inactive position.

When either of the levers 35 is rocked in opposition to the pull of its return spring to project its associatedrstop 32 from inactive to active position, the bail-will be rocked to actuate the bellcrank lever 25'to move'e'scapem'ent dog 23 out of engagement with escapement wheel I9 and thereby free the carriage for a running or jumping movementth'ereof to the left under the pull of motor spring |3.,

A set of carriage-carried tabulator stops 4| (only some of which are shown) are provided for coaction with the frame-carried counterstops 32 to arrest tabulating travel of the carriage, there being one of the stops 4| for each letter-spaced printing position of the carriage. A tabulator stop carrying bar 42 is held to the carriage and extends transversely of themachine- Stops 4| are pivoted at one end on a rod 43 extending across guide slots 42a-in thefr'ont' edge o'f-b'a'r 42;

and the other ends of the stop's extend through guideslots 42b in the rear edge of bar 42. Each stop 4! has'a projection 44 for arresting upward swinging of the stop when the stop reaches an inactive position, and'a projection 45 for arresting down-ward swinging of the s'topwhen the stop reaches its active position. Each stop 4| has a rearwardly projecting nose or-lug 46 affording an abutment for engagement with the right hand side of a projected counterstop 32 to arrest the carriage if said stop 4|"i's' set inactive position; Lugs 46 of stops4| will-pass any retracted counterstop'32 in both the active" and inactive positions of the stops 4| and will pass any projected stop 32in the inac'tive positio'n of stops 4 E'ach stop 4| has two small notches 41 and 48 for coaction with therear e'dge'of'a thin bar 49 (held to the stop bar 42) to yieldin'gly latch the stop in inactive and active positions respectively, each said stop being slightly resilient to permit spreading of its ends apart when the stop is forcibly rocked about the pivot rod. Each stop 4| has a second rearwardly projecting nose or lug 50 above lug 46.

As is usual in machines having two sets of tabulating steps such as above described, each of the carriage-carried tabulating stops 4| is left set or releasably latched in either its active or inactive positions, one or more of the stops 4| being left in active position for the printing of a particular tabulararrangementof matter and the remaining ones being left in inactive position. For selective positioning of the stops 4| in any desired grouping of actively and inactively positioned stops, there is provided the known stop position changer or shifter which comprises a yoke 5| pivoted at 52 on the framework ID for rocking thereof about a horizontal axis extending transversely of the machine, said yoke having a forwardly projecting stop-shifting finger or proiecmon 53 located substantially medially of the sides; of the machine and of such width transversely of the machine that in each letter spaced position of the carriage, said finger is interposed between the two projections 46 and 50 of a different one of the stops 4|. The stop shifter iii-53 is shiftable in opposite directions from a normal intermediate" position to shift a stop 4| registered therewith either to inactive. or to active position and to return to the normal position of the shifter and leave the shifted stop in its shifted position.

The foregoing described: parts of the machine are known. The improvements whereby the escapement release means the stops 32 and the stop shifter i53 for stops ll are moved by mechanical power :will now be described, and

there will also be described an' improved braking means for retarding or controlling tabular movements of the carriage and improved v means whereby said braking means .are' applied and released by mechanical power: 1

A main power shaft 54 extends'horizontally across the machine adjacent-the rear and bottom of the main framework lD, said shaft .being journaled in the framework l5 and being constantly rotatively driven whilethe machine is in use, The driving means for-shaft 54 comprises an electric motor 55 stationarily' mounted in framework 10, a short' countershaft 56 'journaled in framework Ill, pulleys 5'! and 58'fixed respectively on the drive shaft-of the motor and on the countershaft, a drive belt 59' connecting the pulleys, and meshing gears 60 and BI fixed respectively on shafts 56 and 54, the motor being constantly energized from asuitable source of electric current when the machine is in use.

Loose on themain drive shaft 5 is a pinion or gear 62 which is connective at will with shaft 54 through a single revolution -clutch mechanism to turn withsh aft 54 through one revolution from a normal latched position of said pinion 62. This Single revolution clutch mechanism is adapted to be put into action, or be tripped to couple pinion 62 with shaft 54, through depression'of either one of a plurality of control keys hereinafter described. I

The driving'element of the clutch is a ratchet wheel 63 fixed to shaft 54, and the driven element of the clutch is a'dog 64 normally held disconnected from the ratchet wheel. Dog 64 islpivoted at 65 to'a disk 66 which is loose on shaft 54 and is coaxial with and fixed to the pinion 62. A torsion spring B'I-is connected with the dog and disk to constantly bias the dog to engagethe teeth of the ratchet wheel for driving of the pinion 62.

For tripping the clutch for biased driving enagement of the clutch elementsand for disengaging the clutch elements and arrestingth'e driving element and pinion 62 when the latter has rotated 360 degrees, there is provided a clutch tripping and clutch disengaging lever- 65 which is rockable about a fixed pivot 69 heldto framework Ill. The pivot- 69" extends-through a short longitudinal slot ll-'in' lever 58. A spring is connected with framework It! andthe'upper arm of lever 68 to urgetheleverto and yieldingly hold it in the normal position shown in Figures 1 to 3 andFigures 5 and'6, in which pivot 59 is engaged with the lower end wall of slot H. o

In the normal disengaged condition of the clutch, the dog is held rocked :about its pivot against the force of spring ii'l'into a position in which the nose 'of the dog is out of the path 'of travel of :the teeth of the ratchet wheel 53',

a lug 64a on the tail of the dog is seated'on' top of a lug 6811 on the upper end of lever '68, and a1stop-lug ii lb 'onzthe dog'is engaged behind a stop pin 12 projecting laterally from disk 66. The force of spring 10 is 'sufiicienttoxovercome the force of spring 61; but spring 10 is adapted-to stretch momentarily to permit lever 68 to be momentarily driven downward by dog' 64 at the the dog from the ratchet wheel 63 while the dog is held against rotation by lever 68.

"Reverse-rotation of pinion 62, disk 66 and the clutch dog 64 about shaft '54 in the normal disengagedconditionof the clutch is prevented by a U-shaped latch lever 13 journaled on a fixed pivot 14 held to framework l0. One rearwardly extending arm of lever 13 is formed with a laterally extending lug 15 opposed to and constantly urged toward the periphery of the disk 65 by a spring 16 which is connected to said lever and to the framework [0. The disk is provided with a peripheral notch one side of which affords a cam surface 11' and the other an abrupt shoulder 18. The lug 15 of latch lever-13 is normally engaged behind the shoulder 18 to hold the disk against accidental reverse rotation or reverse rotation by the force of the clutch dog spring 61. 'It will be observed, therefore, that the pinion 62 is normally releasa'bly held in a predetermined angularly rotated position.

The pinion 62 is adapted to drive a rotative but normally stationary actuator. This actuator consists of a short horizontal shaft 19 which is journaled in framework l0 and is formed with a single longitudinal and straight fin or blade 80 which extends substantially the full length of the shaft and projects from the shaft a short distance in a plane substantially tangential to the shaft. The actuator is located substantially medially of the sides of the machine and is parallelto and located slightly above and to the rear of the main drive shaft 54. A pinion BI is fixed on one end of the shaft 19 and meshes with pinion 62, the ratio of the pinions 52 and 8| being such that the actuator is rotatively driven through one-half of one revolution per each single revolution of pinion 62.

. As hereinbefore described, the machine shown is provided with a group of the stops 32 arranged for decimal tabulation, but it-wil1 be obvious that'a single stop 32 or a number less than 10 may be employed. In the'machine shown, ten

, control keys 82 are providedforzstops 32, one

end of each cycle of engagementiof the clutch for each stop, and two additional control keys 83 and 84 are provided for the shifter or positioner 5l'53 which moves the stops 4| carried by the platen carriage. These twelve control keys are arranged in the keyboard of the machine at the rear of the type control keys (not shown) to extend in a straight horizontal row across the machine with keys 83 and 84 at opposite ends of said row of twelve control keys. Depression of any one of these control keys will, through the means hereinafter described, cause the single revolution clutch to cycle torotate the actuator 1980 through one-half of one revolution from a normal position of the actuator, and restoration of the depressed key will cause the clutch to cycle to rotate the actuator through the second half of a revolution, thus restoring the actuator to its normal position. The normal position of .the actuator with neither of the twelve control keys depressed is that shown in Figures 1 to 4 and Figures 14 and 17. i r

The actuator 1986 is adapted to actuate the stops 32 and the shifter orpositioner 5l53 for stops 4| selectively through the medium of twelve selectively settable interponents or couplers. Ten interponents 85, one for each stop 32, are provided, and two additional interponents 86 and 81 for the shifter 5l53 are provided in the machine shown. The twelve interponents are normally out of the path of movement of the actuatorand are arranged for selective positioning thereof'formovement by the-actuator. Each interponentcomprises twoflat plates rigidly held together in spaced relation by'two shouldered pins 88 and 89, the reduced ends of the pins passing through the plates and being peened over to lock the plates and pins together, as best shown in Figures 11 to 13.

Each interponent 85 is pivoted'to and extends forwardly from the pendent arm of a different one of the levers 35, the pivot pin 88 of the interponent passing through a pivotal bearing hole in the lever with the side plates of the interponent contacting opposite side faces of the lever to guide the interponent. A light spring 99 is preferably connected with each lever 35 and with a lug 9| on the associated interponent 85 to urge the forward end of the interponent downward.

The interponents 8E and 8? are DiVOtBL through their pivot pins 98 respectively to levers 92 and 93. The levers 92 and 93 are pivoted to framework It by axially aligned pivots 9d. and 94a to rock about a'common axis which extends horizontally transversely of the machine. A pin 95 is fixed to lever 92 behind this axis and is engaged in a longitudinal slot 96 in an upstanding link 9'1 which is pivoted at its upper end at 98 to the left hand side arm of the yokelike stop shifter I53. A pin 99 is fixed to lever 99 forward of said axis and is engaged in a closed longitudinal slot IIJIJ in an upstanding link IGI, which link is pivoted at its upper end at N12 to the right hand side arm of the yoke like stop shifter 5l-53. Levers 92 and 9-3 are in effect bellcrank levers.

The stop shifter 5I--53 is urged to, and yieldingly held in, a normal position thereof shown in Figures 2, 3, l4 and 17 by a spring I93 connected with link HM and. with the forward end of lever 93. A torsion spring H39 is connected with framework I9 and with lug am of interponent 86 to urge the forward end of the interponent downward and also to rock lever 92 to normally hold a stop lug 196 on the lever pressed rearward against a limit stop IIlI on framework I9. Lug 9Ia extends leftward from the left hand side plate of interponent 86 but is otherwise similar to lugs 9I of the remaining interponents. A torsion spring I99 is engaged with framework I9 and with the lug 9I of interponent 8? to urge the forward end of this interponent downward and also to rock lever 93 to normally hold a stop lug I94 on the lever pressed rearward against the limit stop I91 on framework it. A limit stop M9 on framework It is engageable by lugs III and H2 on the side arms of stop shifter 5I--53 to limit rocking of the shifter in opposite directions from the normal intermediate position of said shifter. Normally the springs I93, I98 and I99 yieldingly maintain the levers 92 and 93 and the stop shifter in an idle condition in which the pin 99 is located at the closed upper end of the slot I99, the pin 95-is located midway between the upper and lower ends of slot 95, and the stop shifter is located in its intermediate inactive position shown in Figures 2, 3, 14 and 1'7.

Each of the twelve control keys (the ten keys 82 and the two keys '83 and 85) is a part of a different one of twelve similar operating trains, each of which trains is manually movable by pressure on its key from a normal position to V crank key levers .fulcrumed on a horizontal pivot rod H3 'held to, and extending transversely from, the framework ID. The twelve control keys areheld to twelve key levers H4a to H41. The pendent arms of the key levers are bent inwardly toward the foreand aft medial vertical plane of the machine, and links H5 connect the lower ends of the key lever arms with the lower ends of theypendentarms of the twelve identical bellcrank levers I I6.

The levers H6 are fulcrumed on a horizontal pivot rod I" held. to, and extending transversely of, the framework II] slightly forward of shaft. 54. Each lever IIB has a rearwardly and upwardly extending arm provided with an elongate upwardly facing end edge H8 normally located under and engaged by the pin 89 of the interponent to be moved by the lever, said arm of each lever being loosely engaged between the side plates of the associated interponent; The key levers are guided in slots in a comb II 9 fixed to framework I 9 and normally abut the bottom face of the comb forward of the slots as indicated in Figures 1 to 3. Return springs I29 for the twelve key operated trains are connected with comb H9 and the key levers. The levers II 6 are spaced :by and guided in combs I2I and I2Ia'fixed to framework I9.

Depression of either oneof the twelve control keys not only positions its associated interponent for actuation by the actuator I9-80 but also actuates a universal'control'. means for the single revolution clutch, which control means is spring actuated or restored upon return of the depressed key and causes a complete cycle of operationvof the single revolution clutch to take place both when a control key is depressed and when the key is released. The universal actuator 19-89 is thus rotated through the first half of a revolution whenever one of the control keys is depressed and completes the revolution whenever the depressed control key is released. This control means will now be described.

An upstanding bail I22 is located immediately behind the pendent arms of the group of twelve bellcrank levers H6. This bail has its side arms pivoted to the main framework In at I23--I23 and is normally urged forward by a return spring I55 connected with the bail and the framework. The pendent arm of each lever H5 has at the rear thereof a finger I I611 engageable with the crossbar of the bail I22 to rock the bail rearwardly upon depression of the lever actuating control key, fingers IIBa being permanently bendable fore and aft of the machine for adjustment.

A pivot stud I24 fixed to the upper end of the left hand side arm of the bail projects leftward through a clearance slot in an adjacent part of framework III and pivotally supports the forward end of a rearwardly extending control arm I26 which is movable in response to rocking of the bail I22 and rotation of the disk cam 66 as hereinafter described. Projecting upward from the upper end of control arm I26 near the rear end of the arm is an upstanding lug or projection I2'I coactive with a laterally extendin pin or projection I28 held to clutch lever B8'near the lower end of the latter to rock lever 68 in one direction from clutch disengaging position when a control key is depressed and in the opposite direction from clutch disengaging position when the depressed control key is released. Extending laterally from and pendent from the rearend of. arm IZG-is an arcuate lug I29 coactive for safety purposes as hereinafter explained with a pin I30 fixed to the frame.

A light spring I3], of less forcethan latch spring 76, extends downward from a stud I32 on the rear end of the left hand arm of latch I3 to a stud I33 ,on control arm'-|26 at the rear of the pivot I24 of arm 126. to normally .hold the upper edge of arm I26 engaged'underpin I28 on clutch lever 68. A push link I34 pivoted at its upper end on stud I32 has at its lower end a longitudinal slot I35vin the upper end of which stud I33 is normally held engaged by spring I3I. Cam edge ll of disk 661s adapted to depress the rear end of latch lever I3 far; enough to depress arm I26 about its pivot I24to lower lug I2'I far enough for pin I20 on lever 68 to pass over the top of lug l2'l. The ball is restored by spring I55 to the normal positionshown in Figures 1, 2, 3, 14 and 17 from the key drivenposition of the bail shown in Figures 4, 5, 6, 7, 15, 16, 18 and 19. Permanently adjustably' bendable stop lugs I36 and. 53'! are formed on a sheet metal part of the framework I for engagement by stud I24 'to arrest rocking of thebail I22 at its normal and key-driven limits of motion.

7 A power actuatedcarriage braking means is provided, saidmeans being effective to frictionally retard tabulating movements of the carriage and to frictionally resist rebound of the carriage when a tabulatingmovement ,of the carriage is arrested. The carriage brake is applied automatically whenever: one of the ten control keys for stops 32 is depressed, and the brake is automatically released/when the depressed controlkeyis released.

.A pair of metallic brake disks I38 are mounted on hub Ia of drum,l5:to turn.with the drum and slide axially of the drum, each of said disks 7 being formed with a lug or key I38a engaged in and slidable along a keyway or groove. I39 formed in and extending longitudinally of hub Ilia. A rigid or substantially rigid friction-disk I40 of fiber or other suitable material having a'high coefiicientof friction, is loosely mounted on hub I5a between thedisks 138 to permit disk I40 to slide axially of the drum and to permit the drum to rotate relatively to disk: I40 when the latter is locked against rotation. A spring MI in the form of a resiilient metallic spider bears against the forward one of the disks I38 and constantly holds the .three disks pressed together with the rear one of the disks 138 abutted against the drum. The spider is centered and seated on an annular boss on the adjusting nut I42 which is threaded on the hub I5a. By adjusting nut I42, the pressure with which the three brake disks are held engaged may be varied. A look nut I43 threaded on the hub. I5a retains the adjust ment. 1* V The frictional engagement between the three disks normally causes disk I40 to rotate with the drum, and power means. are provided to'lock the disk I40 against rotation in both directions when-' ever one of the control keys for stops 32 is depressed and to unlock said disk when the depressed key is released, said power means normally leaving disk I40 unlocked. The disk I40 has a plurality of closely spaced locking notches I40a formed in its periphery, the side walls of each notch being substantially parallel or only slightly divergent and extending substantially radially (if-the fdiskil i l 1 T a A locking arm I44 is formed at one end-with'a yoke-lik-portion' I44a pivoted on a' pivot'pin' I45 fixed'tor'framework Ls aidarm being-formed at its free end with a rearwardlybent, locking lug I44b arranged to engage edgewise in one of the notches -Ia'5 in. disk ,I40 and corresponding in thickness with the narrower inner; end portion of the notch. Movements of arm I44 lto lock and unlock {disk I 40 ,are controlled by a lever I46 having a yoke-like intermediate portion I46a pivoted on pin I and stopflugs, I46b and I46c. A torsionspring I41, wrapped around pin 45 and engaged with theyoke-like portion I46a of the lever I46 and with a pin I48 fixed to framework I0, normallyholds the lever I46 rocked to a brake release positionin which lug I462; is engaged with pin 148' as shown in Figures2and10,

Brake applyingrocklng movement of thelever I46 is arrested by;engagement of lug I46c with pin I48 as shown in Figure 8;. Lever I46 is rocked to brake applying position by a lug I49 which is formed on and projects forwardly from the upper end of the link :26 which actuates thebellcrank 25 to release and restore the carriage esq lpement. Lug I49 overhangs the-right hand arm of lever- I46,,and .a pin J50 projects forward fromthe left hand' arm of said lever and :engages over the locking arm I44 between the pivoted and free ends of-the; locking; arm. 'A torsion spring I51, wrapped aroundpin l45 and engaged with the yoke-like-portion I441],v of the locking arm I44, and the yoke -likeportion I46d of lever I46, normally yieldingly holds the arm against pin I50 on the lever and yieldingly constrains the arm to rock withthe lever. If lever I46 should be moved to brake applying :position when no notch M0411 is opposite lug-144b, the lug will ride on the peripheryof the-disk I40: until a notch I 40a arrives oppositelugJMb, "whereupon spring I5I will, forceithe lug into the notch.

The described arrangement, prevents temporary blocking of power movement of link 26 when no notch MM is positioned to receive ,lug- I441) on a power down pull onlink 26.-

V Operation From the foregoing descriptiongof the various parts of theimproved machine it willbe obvious that the rotative actuator Iiirotatesfrom a normal stationary position 1through the first half of a completerevolution when any one of the twelve control keys is depressed and. remains stationary until the depressed key is released; and that thereafter said actuator rotates through the second half of,a;c omplete revolution when the depressed key is released and remains in its original and normal position until the same, or

another, control key isldepressed. It will also be obvious that twelve interponents (teninterponents 85, an interponent 86 and an interponent 81) are provided, each associated with a different control key foripositioning thereofby key depression for actuation thereofby the rotative actuator. i V 1 vi V Before describing the power actuation-of the key-selected one of ,theinterponent's, a common feature of all of the twelve interponents not hereinbefore specifically described will be pointed out. The two side plates of each interponent are re-" cessed at its top from its .free forward end to provide forwardly facing shoulders-I52, and also to provide upwardly facingshoulders or edges I531 extending forwardly'from the lower ends of shoulders I52 :"to the forwa'r'dfend-s of the inter ponents. At this point, it'.might-.also belpointed out that-the fln orzbladefportion'of the actuator need n t necessarily be disposedtangentially to the shaft portion ofthe actuator.

At the half-step rotated position of the actuator, the upper end of the shoulder I52 of the actuated interponen't (and, preferably, also the lower end of said shoulder) is above a straight line through the axes of the actuator and pivot 88 of the interponent. Theshoulders I52 and IE3 of the interponent's are so shaped that, in this positioncf theactuatonthe shoulders I52abut thethen rearwardly directed edge of the fin portion of the actuator and curve about the axis of the actuator concentrically with said axis so as not to obstruct the' se fcond half of the revolution of the actuator while still looking the actuated interponent against return movement by a togglelike action aslong as the actuator remains in its half-step rotated position. The shoulders I53 of the interpone'nts are preferably'so shaped and related to the shoulders I52 that shoulders I53 of the actuated interponent abut fin 8!! of the actuator at the halfs'te'p rotated position of the actuator. These features of the interponents and actuator are, 'perhap s, best shown in Figure 12, from which it willalso be noted that the outer edge of fin '80 of the actuator is preferably rounded. V

It will be noted th'at the part or lever to which the actuated interponent is pivotedis moved by the actuator and'interponent with an action similar to that of a crank and a pitman which automatically connect todrive said part or lever, and which stop on dead center, or slightly past dead center, to hold the part or lever against biased return movement until the actuator and interponent are subsequently disconnected, the actuator'resembling th'ec'rank and the interponent rsembling thepitman. V

To move a selected oneof the ten stops 32 from inactive to active position-arid hold it there, the

associated one of 'the ten keys 82 is depressed and held depressed, and to permit the actively positioned stop to return to its normal inactive position the depressed key is released.

When the selected one of the keys 62 is de pressed and held depressed, the following actions take place. The selected one of the ten interponents 85 is rockedupward from the position shown in Figure 3 into a position for actuation thereof by the actuator 'I9'80,this latter position corresponding "to the key-setposition of the interponents 86 and 81 shown in Figures 18 and in which shoul'denl52 is raised into the path ofrotat'ion of fin '80 of the actuator. Setting of the interponent by depression of the selected kei 82 causes the interponent setting lever II6 not only to lift the forward end of the selected interponent, but 'alsorock the universal control bail I22 rearwardly from the normal position thereof shown in Figure '3, thus causing lug I21 on clutch control arm I26 to rock cl'utch disengaging lever 68 to the position-shown in Figure '4, to permit the clutch elements 63 and 64 to engage under the influence of spring '61. During the initial portion of the ensuing single revolution of the driven clutch element and 'of the disk 66 and pinion 62, cam edge 17 of diskfifimoves'the-clutch latch lever I3 and link I34 downward, thereby rocking the clutch control arm I26 downward about its pivot I24 into the position shown in Figure 5, in which position, said control arm is held until the disk completes or substantially completes one revolution. In this'depressed position of the controlfarm' I26, the lug I29thereon isenga'ged behindepin I130 toiprevent return-of the bail I22 even though the depressed. control key bereleased before the first single cycle of revolution of the clutch is completed. Depression of the control arm,- however, carries lug I21 thereon down far enough to permit pin I28 to pass forwardly thereover and permit clutch disengaging lever 68 to immediately reassume its normal position before disk 66 completes its revolution, as shown in Figure 5, sorthat' lever 68 is immediately repositioned'to disengage the clutch at the end of a single revolution of the driven clutch element. When this" revolution is completed, the latch lever 13 will rock upwardly to lock the driven clutch element against reverse rotation, and arm I26 will rock upwardly to position lug I21 behind pin I28 on leve'i" 68, as shown in Figure 6. It will be understood that the depressed key 82 should beheld depressed until a stop 4| on the carriage has engaged the activated stop 32. After this stop engagement, with resultant arrest of the tabular travel of the carriage, has occurred, the depressed key is released, permitting spring I55 to rock the universal bail I22 forward to its normal position. This restoration of bail I22 causes lever 66 to be rocked by arm I26 and lug I21 from its normal position to again free the clutch for a second revolution of its driven element, the lever 68 rocking in a direction opposite to that in which it was rocked by rearward movement of the bail.' If thedepressed key 82 should be released prior to arrest of the carriage, the second revolution of the clutch will occur immediately upon completion of the. first revolution, so that the actuator 'I'9'80 will always be in normal position when no control key isdepressed, since it will be noted that lug I29 and pin I30 prevent return of the bail to normal positionuntil after the clutch has first completed one revolution so that the clutch will always be released once for each depression and once for each release of a control key.

The first revolution of the driven element of the clutch rotates the actuator Htthrough one-half of one revolution from its normal posir tion shown in Figures 3 and 4, to that shown in Figuresfi and 7 This half revolution of the actuator causes the fol-lowingactions to occur. The set interponent 85 is movedlto the position shown in Figure 7 and held locked in this position until the second revolution of the clutch and second half revolution of the actuator take place, whether or not the depressed keyisreleased prior to the second revolution of the clutch. This movement and locking 'of'the activated i'nterponent '85 rocks thelever 35 connected therewith into the position shown in Figure 7 thus moving the connected stop32 into its activ'e position and rocking bail 28-3t'3l and the connected arm 27 into the position shown'in "Figure 7 and locking them there. This movement of the bail and the arm 21 actuates (through link 26) the lever 25 to release the escapement and "hold it released to permit the carriage town to the left until-arrested by engagement of astop 4'I with-the activated stop 32 and also actuates (through-link 26) the lever I46 to apply the carriage brake and hold it applied by the locking 'of the disk I40 by locking arm 144. On thesecond: revolution of the-clutch, the actuator makes the secondhalf ofa single revolution thereof, thus releasing the activated interponent 85, whereupon all the ac'tiv'ated parts re-a'ssume their respective-normal positions under the influence of the several springs :hereinbefore described.

' One 1101. more :of i-the stops -4 I carried by the carriage are as usual set in active position and the others are set in inactive position withrthe stops releasably held in their respective positions. To change the setting of any stop 4|, the stop is registered with part 53 of the stop positioner or setter 5 [-53 and the positioner is rocked from its normal intermediate position in one direction or the other depending upon whether the registeredstop is to be moved to active or inactive position. Rocking of the positioner from its normal position moves the stop from one of its releasably held positions to the other, and restoration of the positioner to its normal position leaves the stop in the releasably held position to which it has been shifted. Depression and release of control key 84 results in downward rocking of the positioner from normal position to move the registered stop 4| from inactive to active position and in return of the'positioner to normal position, while depression and release of key 83 results in upward rocking of the positioner from normal position to move the registered stop to inactive position and in return of the positioner to normal position. 7

Depression of control key 84 actuates its connected one of the twelve levers H6 to set the interponent 81 for' actuation by the actuator 19-80 and-rocks the bail I22 to start a single cycle of'revolution of the clutch, while release of the key 84 permits restoration of the activated parts to normal, all in the manner described above in connection with power movement of stop shifting levers 35. The first half revolution of the actuator picks up the set interponent 81 as shown in Figure 15 and moves it to and holds it in the position shown in Figure 16 until, upon release of key 84, the clutch makes its second revolution and the actuator makes the second half of its revolution. The first half revolution of the actuator moves interponent 81 to rock lever 93 into the position shown in Figure 16, causing the positioner to be pulled down by link I8! and actively position the registered stop 4|. The second half revolution of the actuator frees the locked interponent 81 and permits spring restoration of the interponent and the parts moved thereby up to and including the stop positioner. The space between lugs 50 and 46 of the stops 4| permits return of the positioner without movement of the registered stop. Depression of key 83 actuates its connected lever ||6 to set interponent 86 and cycle the clutch to actuate lever 92 to rock the positioner upward from its intermediate position through link 91 to set a registered stop 4| in inactive position as shown in Figure 19, and release of key 83 causes the clutch to make its second cycle for restoration of the actuator to normal and frees the actuator driven parts for spring return to normal, leaving the stop in inactive position. The slots 95 and Hill in links 91 and |0| permit the described two-directional shift of the stop positioner from its normal intermediate position.

I claim:

1. A printing machine of the class described having, in combination, a normally stationary actuator which is rotative about a fixed horizontal axis and which, through only a single small part thereof around said axis, is extended eccentrically to said axis to form a single driving portion, an operation-effecting mechanism which is biased to move out of the path of revolution of the actuator into a normal stationary position and is settable for engagement and driving thereof against its bias by said driving portion of the actuator during aninitial half of a revolution of the actuator in one direction out of and back into normal stationary position and for disengagement of said driving portion therefrom after the actuator'turns through an initial portion of the final half of said revolution, an operation-control element for said actuator and for said operation-eifecting mechanism which is movable from a normal stationary position for setting said mechanism and is biased to return to normal position when released, and power means responsive to movement of said control element against its bias to turn the actuator in said one direction out of its normal position through the first half of a revolution and responsive to return movement of said control element to complete said revolution of the actuator.

2. A printing machine, as claimed in claim 1, having means for automatically locking the actuator against rotation at the completion of each half-revolution of the actuator by the power means, and means responsive to each movement of the control element from its normal position.

and to each biased return movement of said element to release said locking means to free the actuator for rotation by the power means.

3. A printing machine, as claimed in claim 1, having several individually operable operationeffecting mechanisms of the kind set forth each settable for driving thereof against its bias by the driving portion of the actuator, and also having a corresponding number of individually operable operation-control elements .of the kind set forth each operable to set a different one of the operation-effecting mechanisms when moved from normal position and to movements .of each of which elements respectively from and to its normal position the power means is responsive in the specified manner to rotate the actuator.

4. A printing machine, as claimed in claim 1, wherein the actuator is a shaft which is concentric throughout most of its circumference with the fixed axis of rotation of the actuator and has extending therealong and fixed thereto a single fin-like driving portion which protrudes from the shaft in a single direction and is disposed substantially tangentially to the shaft, and wherein there are provided a plurality of said settable operation-efiecting mechanisms individually settable for driving and release thereof by said finlike driving portion, and there are also provided a corresponding plurality of said operation-control elements each movable from its normal stationary position to set a different one of said mechanisms and to movements of each of which control elements respectively from and to its normal stationary position the power means is responsive in the specified manner to rotate the actuator.

5. Aprinting machine, as claimed in claim 1, wherein the operation-efiecting mechanism includes a lever which is biased to a normal position and a settable interponent which is pivoted to said lever and is biased to swing to a normal unset position out of the path of revolution of the actuator from a set position in which said interponent is drivable by the actuator in a direction to thrust said lever from normal position against its bias, and wherein movement of the operationcontrol element from normal position against its bias swings the interponent relatively to the lever into set position, said lever being rockable about a fixed axis parallel to that of the actuator and having an arm which is biased to swing toward the actuator and to which the interponent is 15 pivoted forup'and down swingingmovement' in a plane to which the actuator axis is normal.

6. A printing machine, as claimed in claim -1, wherein the operation-effecting mechanism includes a lever which is biased to a normal position and a settable interponent, which interponent is pivoted. to said lever for swinging of the interponent in a vertical plane and is biased to swing to an unset position out of the path of revolution of the actuator, and wherein, upon setting of the interponent, the driving portion of the actuator thrusts the lever against its bias through the medium of the interponent during the first half of the ensuing revolution of the actuator and is interposed at the end of said half revolution between the axis of .rotation of the actuator and the pivotal axis of the interponent with said driving portion in thrust engagement withthe interponent at a point located between said axes and substantially in a straight line passing through said axes.

7. A printing machine of the class described having,.in combination, an actuator for driving operation-effecting mechanisms of the machine and which is mounted for rotation abouta fixed axis and has a single straight driving portion which extends longitudinally of said axis and protrudes farther from said axis than the remainder of the actuator, manually depressible and spring returned operation control keys, power actuated means responsiveto each said key and controlled respectively by key depression and key return to first and second halves of a single revolution which drives the actuator from and restores it to a normal stationary position, and operationefiecting mechanisms each settable by a different one of said keys to be first driven and then held driven through direct engagement therewith of said-driving'portion of said actuator during the first half of the ensuing revolution of the actuator andto be released by disengagement therefrom of the driving portion of the actuator during the initial portion of the second half of said revolution, each said operation-'eirecting mechanism being mounted and bias for free restoration thereof to a normal unset position out of the path of'revolution of the actuator upon disengagement of the driving portion of the actuator therefrom.

LAURENCE B. HILL.

REFERENCES CITED 7 The following references are of record in the file of this patent: a

UNITED STATES PATENTS Number Name Date 1,345,510 Schluns July 6, 1920 1,945,895 Hart Feb. 6, 1934 2,059,537 Salzberger et a1 Nov. 3, 1936 2,099,011 Gabrielson et a1. Nov. 16, 1937 2,157,053 Crumrine May 2, 1939 2,265, i83 Hill Dec. 9, 1941 2,267,947 Pitrnan Dec. 30, 1941

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