US1367991A - A coepoea - Google Patents

Description

F. sAUERsmoM.

1vPEwmER.

APPLICATION FILED AUG.17, 1937 N n 1,367,991 Patented; ivob. 1921s,

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A TRA/EVS TYPEWRITER, APPLICATION FILED AUG. l?, 1917.

1,367,991. 9mm ma. s; 1921.

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INVENTR."

F. SATTERSTROM.

TYPEWRITER.

lAPPLICATION man AuG.17,1911. 1,367,991. Patented Feb. 8, 1921.

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F. SATIERSTRONI.

TYPEWRITER.

APPLICATION FILED AuG.-|7. 1917. 1,36%1 e Patented Feb. 8, 1921.

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lOl 04 'H8 "5 /A/VENTOR: w/TNESSES: FEfPo//VAND sA-rTERsTRoM.

@un E@ ATTORNEYS.

F. SATTERSTROM.

TYPEWRITER.

. APPLICATION FIL' .1 7. 1,367,991. g' Patented Feb. 8,1921.

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FEB-DIENAND SATTERSTROM, OF HASTINGS, MINNESOTA, ASSIGNOR TO MAGNETIC POWVER TRANSMITTER COMPANY, OF FARIBAULT, MINNESOTA, `.A CORPORA- TION OF MINNESOTA.

TYPEWRITER.

Application led August 17, 1917. Serial No. 186,698.

To all w 7mm` t may concern.'

Be it known that L FERDINAND Szxtrfrnns'rnoM, a citizen of the United States, resident of Hastings, in the county of Dakota and State of Minnesota, have invented certain new and vuseful Improvements in Typewriters, of which the following is a speciication.

The invention relates to improvements in typewriters designed for writing upon sheets of paper, or upon the leaves of bound books, while the same are held ina horizontal 0r flat position. Machines of this type are largely used for billing purposes and must be capable of writing upon large sheets of paper.

rl`he`object of my invention is to provide a machine of this class" adapted for use with either large or small flat sheets of paper, or with various sizes of bound books, and at the same time capable of being operated at great speed to produce accurate and neatly printed work. y Y

rllhe invention consists generally in electrically actuated means controlled by the type keys for setting` type-bar actuating rods inA position to be operated.

The invention consists further -in providing a machine of this class with a continuously rotating shaft armature, and a co` operating rotatable magnet, electrically clutched to the shaft armature by the opera-` tion of any key ofthe keyboard, and furnishing the means for operating any typebar actuating rod, which has been previously set by the operation of a key.

The invention 'consists further in means for demagnetizing the rotating magnet and positively stopping the same `at the end of each revolution.

rlhe invention consists further in the constructions and combinations hereinafter described and particularly pointed out in the claims. j

In the accompanying drawings forming part of this specification:

Figurel is a plan view of a machine embodying my invention, the frame and parts of the mechanism being` broken away to permit showing the essential features on the single sheet of drawings,

section.

r0f Fig. 11.

Figa 2 is aside elevation witha portion ofthe frame and paper holding platen in Fig. Bis a plan view of the type carriage,

thecover thereof being partly broken away.

` carriage and illustrating the arrangement of a single type bar, and also showing a ysingle 'key Lon the keyboard and lllustratingthe electrical connection between the circuit closers operatedby the key andthe operatn `ing mechanism for the typev ban the parts being in Ynormal position;

Fig. 7 is a view illustrating the same parts of the type ycarriagev that are shownby Fig.,

6, with'the type bar and type in position' to make any impression upon the. paper.

Figs. 8, 8 and 9 illustrate the rotating magnet and parts cooperatingv therewith -in positions differing from those-shown in Figs. 6 and 7. 'i

Fig. 10 is a detail showing the parts that are illustratedl` in Fig. 6 at the completion of the operation but` prior to the release of the key.

Fig. 11 is a side elevation and partial section of a portion of the type carriage, showing particularly 'the rotatable magnet and the part coperating therewith.'

. Specification of Letters Patent. i Patnted Feb. k8, 1921.

Fig. 12 is a vertical section on line`12--12 Fig. 13 isa detail section on line l3-l3 of Fig. l1,V looking in the direction ofthe arrow. Fig. 14 is an elevation of in Fig. 11, but looking atk the-device from the opposite side ofthe machine.'vr y i.

Fig. 15 is a detail illustrating the 'escapement for the type carriage andthe means for actuatingthesame. i -l the parts shown' and shaft armature `with which it coperates;

In the yaccompanying drawings forming part ofthis specification, the various elements are Vdesignated throughout by similar reference characters.

Table cmd paper-'supporting platen.

vThe frame or table which supports the working parts of the machine is represented in thedrawings by the reference letter A. This table is preferably provided with suitable legs 2 and carries a stationary platen D upon which `a sheet of paper that is to be written upon (represented by a in Fig. 1),

Vmay be placedandheld in any suitable manner. I have here shown arranged at the left side of the platen (see Fig. 1S) a clip plate 4, carriedbya shaft 6 which extends to the front of the platen and is provided with finger-piece 7. YSpring arms 5 tend to hold the' clip plate against the platen. ByV bearing down upon this finger-piece the shaft is partially rotated, and the clip plate. 4 is raised. The -leftehand edge of the sheetV may then beY inserted underfthe clip plate,

. its back edge beine' brought against a ledge or lining up shoulder 8. 1 AT he platen B may be of any size desired,

.and the sizeof the sheet to be written upon is limited only by the size of the platen.

By employing a suitable platen the machine may also be used for writing upon-the pages of bound books.

kThe table is also provided, near its lat eral edgestwith parallel rails 9. 9, which extend substantially from the front to the .rear of the machine, and each rail has a seriesof teeth 12, forming a rack-bar on Athe top thereof. These teeth 12 are slightly narrower than the rail 9, thereby providing a narrow ledge lrat the top ofthe rail on each sidev ofthe rack.

' n The keyboard.

The keyboard which, asa whole, llldesi'gnate by the reference letter C is preferably of substantiallyrectangular form and rigidly secured to the front part of the table in front vof the paperv supporting platen. This `keyboard is providedwith a series ot .keys 10, preferably arranged in banks or rows. and with a spacing key Vor bar 11.

The Vkeyboard is also provided with a series of circuit closers, hereinafter described, and suitable electric conductors connect the circuit closers on the keyboard with the operating magnets on the type carriage.

Type-carriage base-frames.

Arranged upon the table or supporting frame of the machine is a rectangular frame D, which I term the type-carriage baseframe. This frame is provided with the side rails 14, 14, preferably of the forni shown in sideelevation in Fig. 2, and each having at its forward or front end the upwardly extending posts 15, and near its rear the shorter upwardly extending shoulders 16. The posts 15 are connected preferably near their upper ends by a transverse rod 17, preferably held in position by suitable nuts 18, and the rear ends of the siderails 14- are connected by a rod 19 held in position bysuitable` nuts 20. The side rails 14 and the rods 17 and 19 together form a firm and substantial rectangular frame. TWhen the frame is in position upon the machine as shown in Figs. 1 and 2, the side rails 14 extend downward outside of and in close proximity to the stationary rails 9. This carriage is provided with wheels 21 each having a series of teeth engaging the teeth of the co-acting rack-bar 12, and with smooth faced rims 22 on each side of the gear teeth of the wheel, and these rims rest upon the ledges 13 at opposite sides of the rack-bars 12, whereby the carriage D is sup- Yported and adapted to move back and forth freely upon the rails 9. A shaft 23 is mounted at its ends near the rear end of .the base-frame D in the side rails 14, and

the rear wheels 21 are fixed upon said shaft 23, whereby the wheels at both ends of the shaft must move together over the rack-bars thereby causing both ends of the base-frame to move together and keeping said frame always in alinement with the rails 9 on the table. The base-frame D may be freely moved backward or away from the keyboard by merely being pushed in that direction -by the operator. For the-'purpose of readily permitting the base-frame to be moved forward at any time the required distance to change the position of the paper in respect to the line of type to be printed, I provide a short shaft 24 upon which one of the wheels 21 is secured.V This short shaft preferably carries the forward wheel 21 at the left-hand side of the base-frame. The shaft 24 is mounted in rigid bearings provided in one of the posts 15 and in a post 25 secured to the side of one of the rails 14. The shaft 24 is also provided with a ratchet wheel 2G and a hand-lever 27`is provided for the purpose of operating said ratchet wheel. adjustable stop lscrew 28 and a stop lug 29 are provided forregulating the movement of said ratchet Wheel. These parts are common in connection With typewriter carriages and need not be more particularly described herein.

By operating the hand-lever 27 the corresponding Wheel 21 is turned, and thereby the base frame of the carriage is moved for- Ward, or toward the keyboard, a distance equal to the space itis desired to provide between tvvo lines of typevvriting. Through the means valready described both sides of the base-frame Will be caused to move in unison. rlhe base-frame may be moved backward at any time by simply being.

grasped by the operator and pushed back- Ward or :away from the keyboard, and the front edge of the platen. f

The base-frame is also provided With a transverse rail 28 provided -Witha series of teeth 29, forming a rack-bar, and with a ledge 30 extending along its side and parallel with said rack-bar. T his rail is secured at its ends to the rails 14, preferably by having its face clamped against the shoulders 16 thereon. lThe rail 28 forms means for supporting the rear edge of the type carriage, and also forms means i'or guiding said carriage'transversely of the base-iframe during the typeWritingy operation, as hereinat'ter described.

Type-Umwege frame and supporting merma.

the rod 17 (see Figs. 1 and 2). At its rear the plate 31 is provided with the Vbrackets and 36. These brackets are provided With the horizontally arranged pairs ot' guide- Wheels 37, 37, which engage the front and rear surfaces oiE the transverse rail 28. The bracket 35 is provided with upwardly extending lugs 38 in. which is mounted a short shaft 39 provided with a wheel 40 that rests upon the ledge 30 on therail 28. The bracket 36 is also provided with the upwardly extending lugs 41 infvvhich is mounted a short shaft 32.V This shaft is provided with a loosely mountedvvheel 43 that rests upon the ledge 30,7said vvheel being :formed integrally vvith `a sleeve 44 and pinion 45, the pinion 45 being in mesh with the rack-bar 28.v The sleeve 44Y has a clutch yaceithat is engaged With a correthereof. Y

spending clutch face 46 formed on a tivopart sleeve that is capable of sliding longitudinally on the shaft 42, but is compelled to `rotate with the escapement Wheel 48 also of the clutch are held normally against each other by a spring 47. rPhe clutch members may be separated when desired by a lever 47 to` which is connected a push-bar 47 provided on the shaft 42. The tvvo members f that extends to the front of the carriage.

.any desired means may, however, `beieinployed for separating thev parts of the clutch. rlhe' type ycarriage is provided with an escapement arranged to be vibrated by a lever 50 connected to an actuating rod 51, the

means for actuating this rod being hereinafter described (see Figs. 1, 3 and 15). j L

As shown in Fig. 15 the escapeinent is provided With-a ratchet Wheel 55 and a pivoted dog 56 engages` this ratchet Wheel and prevents any backwardy or reverse movement InFig. 19 l have shovvn the diferentlposoy sitions assumed by thedogs49a and49b oi i the escapement, Whileit is being operatedr to permit the escapement' Wheel 48 to turn one tooth. As hereshovvn the dog 49a is formed integrally'with a sleeve 49 Whichris secured 'to the upright shaft 57. The lever 50 is securedto the upper end of the shaft 57, and as said lever Vis oscillated the dogs ,are vibrate'd laterally.

The dog 49" is pivoted to the `dog 49a and is provided with aspring 49 (see Figs. 15

and 17 byvwhich, when the end or this l dog is net in engagement with one of the teeth of the escapement Wheel, its tree' end will be raised into the position shown in Figs. 15and 19.

By examining theposition of these dogs as illustrated in the detail views, lfig; 19, the .action ot the escapement dogsinpermitting the escapeinent Wheel to turn one tooth lwith each lateral oscillation ot the ,y

dogs will be readily understood.y y

type-carriage actuating spring is provided'in a barrel 52 and is'fconnected to the type carriage by a steel orvr other suit-able ribbon or flexible connection 53.

'ihe arrangement of a spring vfor moving the typevcarriage in one direction, the spring being Wound up as the carriage is moved by the operator in the other direction,` and the faction of an escapement, permitting the Vtype-carriageto be moved by a spring, step f by step, as the type bars are actuated, is common in'type-vvriters and will not herein be more particularly described.

:rae may" atten. n

-I have .indicatedl bythe reference letter Ein Figs.` 1 and 7of the drawings an inking ribbonpvvhich is arranged position to be struck bythetype above the paper as they y iis 'The gpc-bars md their operating rods.

The plate 31 of the type carriageris provided, Apreferably at the forward central part thereof, with a series of grooves60, all extending on lines radiating Jfrom a common center. The plate 31 is preferably made considerably thicker at the portion inv which the grooves are formed than it is in its other parts, anda semi-circular opening 1s provided toward which this thicker surface Y slopes. The grooves 60 are formed in this thickened portion of the plate, as clearly shown 1in Figs. 3 and 11 of the draw-ings. A type-bar 61 is provided in each of these i, grooves (see Figs.v y6 and 7), and these bars -are provided at their free ends with the desired type 62. There are as many of these pivoted type-bars as there are type in the machine.v The type-bars 61 stand in the position shown in Fig. 6 of the drawings and they swing downward in their respectivegrooves until the type strike the ribbon over the paper as illustratedin Fig. 7. A type-bar actuating rod 63 having a notch or slot 64 near its upper end is connected to the end of each of the type bars 61. A spring 65 is connected to each of the rods 63 and to the plate 31. The upper end of'each of the rods 63 engages a guide slot 65 in the stationary guiding plate 66.

Arranged in the rear andy opposite each of the type bars 61 is an electromagnet 67 provided with `polepieces 68, and a lever armature 69 is pivoted to therear of each of the 1nagnets67 and its upper end is connected to the rod 63 by a link 70.

Arranged in suitable bearings on the typecarriage is a vertically movable standard 71 carrying a horizontally extending yoke or type bar actuator 72, having at its outer edge a horizontal rib 73. This rib 73 stands in close proximity. to the slots 64 in therods 63 (see Fig. 6) when the type bars are elevated and the rods are in the normal Vposi- -Y ment with the rib 73v on the yoke or type bar actuator 72, as illustrated by dotted lines in Fig. 6 and by full lines in Fig. 7, such movement of the standard 71 will cause the i type-bar, whose operating rod is thus ention shown in Fig. 6 to the position shown in Fig. 7, thereby causing the character represented by the type on such type-bar, to be printed upon the paper.

The ccg/ actuated circuit closer-s.

by an insulating plate 77. The springs serve to hold thekeys normally in the raised position shown in Fig. 4 of the drawings. Two insulated circuit closing strips 78 and 79 eX- tend crosswise beneath each rowof springs 75. The strips 78 and 79 are insulated from each other and the strips 78, for the several rows of keys, are connected by the conductors 8O and 81, with a battery 82, to which is connected a grounded conductor 83. A conductor 84 is electrically connected with each of the springs 75, and extends to and is connected with the corresponding electromagnet 67 to which a grounded conductor 85 is connected. Vith this arrangement of parts when any one of the keys 1() is depressed, to the extent indicated by dotted lines in Fig. 6, its spring' 75 is brought into contact with a conducting strip 78 and the circuit Vis closed through the corresponding magnet 67. This magnet then pulls the armature 69 intoy the position shown by dotted lines in Fig. 6, and causes the corresponding rod 63 to engage, through its notch 64 with the rib 73 on the yoke or actuator 72, thereby putting the corresponding keybar in position Vto be moved by the vertical movement of the yoke or actuator 72, as hereinbefore eX- plained.

When the key that has been depressed is released by the removal of the inger oi" the operator therefrom, it isrraised by the corresponding spring to its original or normal position, and this movement breaks the circuit formed through said spring and the Conducting strip 7 8. I have shown a plate of insulating material 76 to which all of the springs 75, for a single row of keys, are secured. I have here shown each spring held in place on the insulating plate by a small bolt 86, provided, beneath the plate, with a nut 87 and forming a binding post with which the corresponding conductor 84 is connected. Any suitable means may, how-V ever, be employed for holdingl and insulating the springs and for connecting the conductors 84 therewith.

The continuously moving motor.

The machine is provided with a suitable continuously running motor, which I have designated by the reference letter F. I prefer to employ a suitable electric motor as shown in Figs. 1, 2, 11 and 12 of the myself thereto, as any suitable motor that may be continuously operated at a uniform speed to continuously rotate a shaft may be employed.

The rotaia?) Ze magnet.

Arranged above the shaft 91 and parallel and in close proximity thereto 1s aV rotatable magnet G, Which is energized each time one of the keys 10 is depressed. Whcn this magnet is energized it moves against and is Y clutched to the rotating shaft armature and is caused to rotate therewith, vto the extent of one complete revolution. yThe magnet 1s mountedupon a freely rotatingv shaft 93 which isv provided witha crank disk 94and a crank pin 95. The vcrank pin 95 is connected by a connecting rod 96 with a stud 97 on the vertically movable ystandard 71. The rotatable magnet is energized by the closing of circuit through the insulated contact strip 79, by the further `movement ofany key 10 after the closing of a circuit through the insulated strip 78.y ln other Words the first movement of the key closes the circuit through the magnet 07 and a further moveinent of the same key, bringing the spring into the position shown in Fig. 10 of the drawings, closes the circuit through ,the rotatable magnet.

lt will be seen, therefore, that each time the key isdepressed the corresponding magnet 67 is first energized, to bring the typebar actuating rod into position to be operated, and vthat a further movement of the key causes the rotatable magnet to be energized and clutched to the continuously rotating shaft armature whereby the yoke or actuator 72 is moved up and dovvnand then to operate the type-baruwhose actuan ing rod has been brought into engagement therewith.

As here shown the type-carriage frame is provided with the vertical standards r93 and 99, the upper portions of these standardsbeingpreferably off-set and curved as shown in Figs. 12 and 13 of the drawings. Fivoted to the upper ends of these standards is a bar 100 which carries the laterally projecting heads 101. These heads are nearly circular in forni andthey provide Vbearings for the shaft 93. The magnet '2t is preferf the ends of the spool, these disks being preferably of the same size and the diameter as" the ends of the spool (see Fig. 16). LThese disks 104 are not necessary to the operation of themachine and maybe omitted if desired. Y .V

The bar 100 is provided With a tail piece 105 (see Fig. 9) to which a spring 106 is connected. lThis spring has its'y opposite end connectedto the standard98 and it tends to rock the bar 100 on its pivot and therebyk to raise the magnet from the shaft armature 91. The crank disk 94 on the end of the shaft 93 has ay notch 107 in its periphery and a pivoted dog 108 is provided having a lug 109 adapted Vto'engage said recess 107. y'lo insure .the lug 109 `engaging the recessy 107, and not jumping 'over the same, l 'Ypreferto cut down the edge of the disk on the side of the notch 107, over which the lug 109 passes `as it enters saidjnotch `(see Fig. 9). A spring 110 is connected to the dog 108 (see Fig. 9) and to a pin 111. This pin tends to hold the dog snugly against the edge of the crank disk so las to insure the lug 109 entering the notch in the edge of Vthe crank disk. For increasing and decreasing the tensions of thespring 110 I provide preferably special means hereinafter described. y

I'also provide on the Vshaft 93 a cam 112, the edge of Which isin the form ofa radially extending lug. A block 113is pivot-` ed on a suitable support and this block has an upward extension 113 Which projects into the plane of the cam 112 and is engaged by said cam, Which action rocks the block '113 uponV its pivotal support. The block 113 carries thev insulated contact springs 114 and 115, as shovvn in Fig. 8 of thedrawings. An insulating block 117 is mounted on the bar and carries a contact spring 118 that is in contact with the ring 119 on one end of the rotatablefmagnet (see Figs.

k4 and 13). lThis ring is connected to the conductor 103 of the magnet.

The insulating block 117 has preferably a recess extending through itwith a contact screw7 110 projecting through one .wall of the recess. A Contact point 120is provided on the spring 118 (see Fig. 4). The contact springs 114 and 115 project into thevrecess in the block 117 and stand opposite thevcontact screw 116 and pointy 120, 'as yclearly shown in Figs. 4, 6, 7, 8 and-10. When theY end of theprojection 113 on the block 113 is engaged'by the cam 112, the block 113 is rocked and moves the contact spring 114 into engagement with the end of the contact screw 11d, as illustrated in Figs. 8 and 10 end Vof the screw 116, and the end oi the contact. spring 115 is in engagement with the contacty point 120011 thespring 118, as illus-V trated in Figs. 11, 6 and 7. A spring 12sL is mounted on arbar 125, that is connected to the standards 98 and99,and this rspring ,engages aheel or lug 126, provided on the block 113, thereby tending to rock the block 113 so as to vhold the Contact spring 115 at all times inengagement with the Contact point 120, While permitting it to be moved away when the cam projection 112 Vpasses the up Wardly extending projection 113 on the block 113. Y

VSecured to therbloclr 100'is a plate 127 carrying apair 'of small hangers 128, and an electro-magnet 129 is vmounted inthese yhangers (see Figs. 8, 10 and 111) An armature 130 for this magnetv is secured upon a small rock shaft 131. r1`he dog 108 is loosely mounted upon the shaft 131, and the pin 111Y is inserted` in the shaft 131 and extends l throughy a slot in the hub or" the dog 108 (see Fig. 6). .To the end of the pin 111 is cono nected thespring 110, which Vis also connected to the dog 108. rifhe lug109 on the dog 108 rides on the edge ci' the cam disk Y 94 while the current is passing through the Y rotatable magnet. s

vVlien'the projection 112 engages the upwardly extending projection on the block 113 the curr-ent .is broken through the rotatable magnet and as the spring 114 engages the end of the Contact screw 116 the current is passed through the magnet 129 by means of the conductor 132 (see Figs. 8 and 14). This causes the armature to be drawn toward the` magnet 129 rocking the shaft 131 slightly upon its axis and moving fthe pin 111 with said shaft thereby increasing the tension on the spring 110. This occurs `just at the instant the projection 109 on kthe `dog 108 comes opposite the recess 107 in the-edge of the cam dish 91, thereby causing said projection to be quickly y'and firmly drawninto said recess and positively stopping the rotating movement of the magnet.' Y f The purpose or" this'is to prevent any overrun of the rotating magnet after the circuit broken and the magnet has been demag netized. As the magnet rotates very rapidly it might slightly over-run it this positive stop was not provided.

contact strip 79 to the insulated block 134 secured upon the rocking block 113, and are electrically connected with the contact springs 114 and 115. Normally the spring 115 is in contact with the contact point 120 on the contact spring 118, so that when any key is depressed a suiiicient distance to bring its spring 75 in contact vwith both of Vthe strips and 79, the rotatable magnet will be'energiZ-ed, the path of the current being in this instance from the battery 82 through the conductors 81 and 80 to the contact strip 7 8,.through the spring 7 5 to the Contact stri*i rl' l 79; through one or the conductors 133, the spring 115 and the spring 118 to the ring 119, thence through the coils ont the magnet to a ground conductor 135. les the rotatable magnet approaches the end of a single revolution the contact spring 114C is moved against the end oi' the contact screw 116, and the spring 115 is now vsvv'itched oil'a trom the rotatable magnet and through the small magnet 129.. fis this magnet is energized its armature 130 is drawn toward it and the shaft`131 is rockedthereby insuring the engagement of the lug 109 on the dog 108 with the recess 107 in the crank dish 91, and positively stopping the rotatable magnet at the right point. 1When the operator releases the key the circuit through the magnet 129 is broken and the parts are returned to their normal position, ready for the nent operation. Y

is the shaft 131 is rocked back to its normal position the tension on the spring 110 is relieved and the dog 108 is restored to its normal position indicated in Fig. 6 oi the drawing, with its lug 109 out of engagement with the recess 107 in the crank dish. rPhe rotatable magnet is, therefore, free to move again as soon as a current is passed through its coils and it is again energized andV clutched to the constantly running shaft armature.

Means for operating the esoapemeat.

1 have already described the construction of the preferred form of escapement, and have stated that it was operated by means of a rod 51. This rod as shown in Fig. 15 of the drawings is connected to the connecting rod 96, and as the upper end of this 'connecting rod is connected to the crank pin on the disk 94,'said connecting rod not only has an up and down motion but its upper part has a to-and-fro or sideto-side motion. This movement imparts a longitudinal reciprocation to the rod 51, which gives a rocking motion to the upright shaft 57 and operates the escapement in the manner hereinbe tore described. By this means the escapement is operated each time the rotatable magnet is caused to niakea revolution, and as hereinbei'ore explained, Yeach time the escapement is operated the type carriage is permitted to move one space from left to right; f Y The spacing device.

It is frequently desirable to operate the escapement so as to permit a movement of the carriage without operating any of the type bars. To do this with this machine it is only necessary to close the circuit through the rotatable magnet without having first brought the operating rod of any type-bar into position to be engaged by the vertically moving yoke 72. pose I providea spacing key 11 arranged to move a spring 141 into contact with two of the contact springs 78 and 79, without closingv thecircuitthroughiany one of the magnets 67. By this means the escapement will be operated so as to permit the type-A carriage to be moved one space without any character being printedfon the paper. By repeating the operation of the space key the carriage maybe moved as many spaces as desired. i A

General operation. 'Ihe general operationof the machine will,

it is believed, be understood from the foregoing description. There are, however, some features of the invention that are yespecially valuable and that should be emphasized.

In ordinary typewriters where there is a direct connection between the keys and the type bars, there considerable elasticity in the touch of the operator. This prevents any undue pounding of the parts of the machine. Where, however, it has been attempted to operate the type bars by any l tating shaft armature. This slippage is liust To accomplish this pur operating rods to engage the vertically movable yoke.. A further depression of the key will close the circuit through the rotatable magnet asalready explained andv will cause' this magnet to.` be clutched to the continuously rotating shaft armature, thereby raising and lowering the yoke and operating the type-bar whose operatingrodhas been engaged with said yoke.. It .isatthis point in the operation thatlthe4 slight slippage referred to takes place. Insteadof having an unyielding connection between the yoke and the means for applying power thereto to reciprocate it, I provide inthe devices de-y scribed means thatpermit a slight slippage between the vertically movable standardand the continuously rotating shaft. 'Ihe'elec-` tric `clutch herein described permits this slippage, which contributes very/largely to the successful operation of the machine.

Moreover, it will be notedthatthe rotatable magnet when not in operation is absolutely free to move as soon asv power is applied to it, and when current is passed through its coils vthe attractionv between the poles of the magnet and the continuously rotating shaft armature causes the magnet to be clutched to lthe armature and to rotate therewith. It is at this point in the opera`- tion that the slippage above referred to occurs, and the action of the parts ismuch softer and devoid of the jerk that would be experienced if a positive connection, such as gears, was provided between they rotating shaft and the means for moving the standrd and yoke vertically to operatethe type As the shaft armature is formedofsoft steel and as therot'atable magnet is clutched closely to said shaft, each time they magnet is energized, there mightv be a tendency to cause the poles of the magliette produce grooves circumferentially in the .soft steelshaft armature. I overcome this however, by providing the diskslO of insulating ma vIl() terial at the ends of the magnet of substanf tially the same diameter as the, ends of theV spool forming the pole pieces of the magnet. These disks of insulating material comein contact with the surface of the shaft arma ture and prevent any grooves being formed therein by the contact of the pole pieces of the magnet with said armature.`

Another importantfeature of the machine is found in the arrangement of the rotatable magnet and the small controllingmag; net that operates the lock for the krotatabie magnet. n

The rotatable magnet cannot be energized or caused to rrotate until after the appropriate key-rod has been broughtinto position to be engaged by the actuating yoke of the machine. The action of the :rotatable magnet in moving the yoke must take place after the appropriate type-bar operating laterally in both directions rod has been put into position to be engaged gized and has performed its function ofv moving such rod intoiposition to be engaged by the yoke, the rotatable magnet is energized and clutched to the constantly rotating shaft armature as already described,

and makes a complete'revolution With said .shaft armature. lWhen this Vcomplete revolution of the rotatable magnet has Vbeen practically completed the current is switched off from the rotatable magnet and onto the stationary magnet thatactuates the stopping device. As soon as this last named magnet has been energized it puts the stopping device in position to stop the movement of the rotating magnet. When the movement of the rotatable'magnet isstopped l the current is cut out of both magnets, upon the release ofthe key, and both magnets remain dead until they are energized again' in succession. Itis Unpossible to energizeV the stopping magnet until after'the rotatable magnet has been energized and has operated.

It Will, therefore, be seen that the three magnets, all of Which have the circuits closed through them by the depression of any character key, must be enero-ized and must act in succession, the magnet that .moves the type-bar operating rod into position to be moved by the reciprocating yoke being first energized, the rotatable or clutch magnet being next energized, and linally the magnet for stopping the rotatable magnet being last energized.V These parts Will, therefore, perform their functions in order, one after the other, and at the close of the operation, or when the clutch has been demagnetized and stopped, the parts Will be in position for another operation, which Will be brought about by the depression ofany After these magnets have been energized in succession and the operation of printing from one of the characters carried by the ykey-bars has been completed, no further operation can be obtained until the operated key has been released, and has been chine.

` believe that l have also made a desirable and valuable improvement in connecting the escapement device to the connecting rod, so that the escapement dogs are moved by poweirfrom the rotating shaft. i Y

It is' customary in typewriters to move the escapement dogs in one direction by power applied by the operator through the keys,

isere-er i and to put a spring under compression or tension at the same time Which will move the escapement Vdogs in the opposite direction. This makes it necessary to employ a spring of considerable power, and the escapement must be Yoperated in one direction against the force of this spring. By connecting the actuating rod for the escapenient dogs to the connecting rod 96, the longitudinal reciprocation oftherod 5l in both directions is obtained from the continuously rotatingv shaft, and the escapement dogs are moved in both directions by power, and l obviate the employment of a spring to move the escapement dogs in one direction.

l do not limit myself to the details of construction herein shoWn and described as the same maybe varied'in many particulars Without departing from my invention.

Iclaim as my invention: A

l. In a machine of the class described, th combination With a series of type-bars, an actuatingjrod for each typeebar and Van electro-magnet for each actuating rod, of -a series of keys, means electrically connecting said keys and said magnet, a rotatable shaft, means for continuously driving said shaft, an actuator, means controlled by said keys for causing any selected actuating rod to be i'oved into lthe'path of said actuator, and

means controlled by said keys, causing said actuator to be connected with and moved by said shaft.

2. ln a machine of the class described, the combination, of a seriesl of keys and typebars, an actuating rod foreach type-bar normally in opposite position, anl electromagnet for each rod under the control of the key for moving the rod to a position Where it may be operated, an actuator for said rod, a constantly rotating shaft, an.r means under the control'of any of the selected keys for operatively connectingA said shaft with said actuator.

ln a machine of the class described, the coinbinatioii,'With a series of type-bars, of a rotatable shaft and means for continuously driving said shaft, of a type-bar actuator, a series of keys, means controlled by said keys for connecting any selected type-bar with said actuator, and electromagnet means, also controlled by said keys, connecting` said actuator and said shaft.

il. in a machine of the class described, the combinationfwith a series of type bars, of a rotatable shaft armature, and means for conkeys for energizing said electricclutch memv Y ator common to all of said` type bars, an electric clutch member arranged to operatively connect said actuator and said shaft armature, ya series of keys, and means, controlled by any one of said keys, connecting any selected type-bar with said actuator. y 6. In a machine of the class described, the combinatiomwith a series of type-bars, of an actuator common to all of said type bars, a rotating shaft armature, an electric clutch member arranged to operatively connect said actuator and 'said shaft armature, a series of keys, means controlled byA said keys for bringing any selected type-bar into connection with said actuator, and means vcontrolled by said keys forenergizing said clutch member. Y

7. In machine of the class described, the combination, with a series of type bars, of an actuator common to all of said type bars, a rotating shaft armature and Van electric clutch member arranged to operatively connect said shaft armature and said actuator.

S. In a machine of the class described, the

combination, with a series of type bars, of an, Y actuator common to all kof saidtype bars, a

rotatingv shaft armature, an electric clutch member arranged to operatively connect said shaft armature and said actuatoigwa series of` keys, and means controlled by any one of said ber. l

. 9. In a machine of tlm lass described, the` i combination, With a series oftype bars, of an actuator common to all of said type bars, a rotating shaft armature, an electric clutch member arranged to operatively connect said shaft armature and said actuator, aseries of keys, means, controlled by any one of said keys, for connecting any selected type-bar with said actuator, and means, also controlled by any one of said keys, for energizing said electric clutch member after the type bar controlled by the same key has been connected with said actuator; f

10. In a'machine of the class described, the combination, with a type-bar, of an actuator therefor, a rotating shaft armature, an electric clutch'member arranged to operatively connect said shaft armature and said actuator, a key, and means controlled. by said key combination, with a series of type bars, of a rotating shaft armature, a rotatable electromagnet arranged-in proximity to said shaft armature, means for yieldingly retaining said magnet vinits normalposition, an actuator common to all of saidtype-'bars kconnected with said magnetandarranged to operate any selected type-bar, a seriesofkeys,

` and means controlled by any one of said keys any selected type-bar with said actuator, and

means controlled by said keys for energizing said rotatable,electro-magnet When any typebar has been connected'yvith said actuator.y

lll. In a machine of the class described, the-combination, Withja typebar,of an actuator therefor, a rotating shaftA armature, .a rotatable electro-magnet arranged inprox-` imity toy said shaft armature, means'fyield-A ingly yretaining said magnetv in its :normal position, and permitting it Whenfenergizedv to ,move-into,l contact With said armature and to be rotated therewith, and meansconnected with saidy magnet for actuatingthe type-bar actuator...

1.5.'In a machine of the class described, the combination, with a type bar and an acf tuator therefor, of a rotating shaft arma-y ture, a rotatable electroanagnet arranged in proximity to said shaft armature, `means yieldingly retaining said magnet initsnormal position and permitting it Wheny energized to move into contact with said armature and to be rotated therewith, means connectedwith said magnet for actuating the. j

type-bar actuator, means for closing a circuit "through said magnet, to energize the same, and means for breaking they circuit through Vsaid `magnet after each operation ofthe type-bar. 'y f 16. In a machine of the class described, a type-bar actuator comprising in combina-l tion a rotating shaft armature, a rotatable' electrounagnet arranged in proximity yto said shaft armature, and means for energizing said electro-magnet and causing it to rotate Y with said shaft armature.

17. In a machinerof the class described, the combination, with a type-bar and an acf tuator therefor, of a rotating shaftV arma-'Vy ture, a rotatable electro-magnet arranged in proximity to said shaft armature, and con'- nected with said type-bar actuator, and means for closing an electirc circuit through said magnet. y i

ISL-The combination, with a rmovable cariis l riage, of a series of type bars arranged upon said Carriage, arotating shaft armature ar-' ranged upon said carriage, a rota-table elec-V tro-magnet arranged in proximity to said shaft armature, means connected With said rotatable electro-magnet for operating said type-bars, a stationary keyboard provided` with a series of keys, and means controlled by any one of said keys for energizing said electro-magnet.

19. The combination, With a movable type-carriage, of a series of type bars .arranged upon said carriage, a rotating shaft armature arranged upon said carriage, a r0- tatable electro-magnet arranged in prof-:'imity to said shaft-armature, a type-bar actuator common to all of said type bars and actuated by said magnet, astat-ienary keyboard provided with a series of keys, and electrical means, controlled by any one of said keys for connecting saidtype bars With said common type-bar actuator, and means controlled by said keys for energizing said electro-magnet. 1

20. The combination, With a type-carriage, and means supporting the same and permitting both longitudinal and lateral movements thereof, of a series vof type bars arranged upon said carriage, a rotating l shaft armature arranged upon said carriage,

a type-bar actuator common to all of'said type bars, an electric clutch member ar-V ranged to connect said actuator and said rotating shaft armature, a` 'stationary keyboard provided with a series of keys, an electrical means controlled by any one of said keys for eonnectingrany selected typebar with said common type-bar actuator, and means. controlled by said keys for energizing said clutch member.

21V. The combination, With a vmovablev type-carriage, a series of` type bars, a powerdriyen shaft, a type-bar aetuatoreommon to all of said type bars, and an electric: clutch arranged to connect said actuator with said power-driven shaft, all of said parts being mounted upon said carriage, of a stationary keyboard provided with Aa series of keys, and means controlled by said keys for connecting any selected type-bar With said common type-bar actuator, and means controlled by said keys for energizing said clutch. i y

In a machine of the class described, the combination, With a type-bar and an actuator therefor, of a rotating shaft armature, a rotatable electro-magnet arranged in proximity to said shaft armature, for actuating the type-bar actuator, means for clos-V ing the circuit through said magnet to energize the saine, means for breaking a circuit through said magnet after each operation of the type-bar, and means'for stopping the rotary movement of said magnet.

lnwitness whereof, I have hereunto set my hand this 26th day of April 1917.

FERDINAND SATTERSTROM.

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