US1335993A - Typewriting-machine - Google Patents

Description

3 SHEETS-SHEET I.

A. W. SMITH.

TYPEWRITING MACHINE.

APPLICATION FILED JULY I1, I918.

Patented Apr. 6, 1920 Hi5 ATTI'JRNEY RN lHHI H l I HHHHH J.

WITNEEEEEI A. W. SMITH.

TYPEWRITING MACHINE.

APPLICATION FILED JULY 11, I9I8.

1,335,993. Patented Apr. 6, 1920.

3 SHEETSSHEET 2. A

K INVENTDR WITNEEISEE JH1I, 2636M 29W; 526w? Hi5 ATTORNEY A. W. SMITHL TYPEWRITING MACHINE.

APPLICATION FILED JULY 11. I918.

Patented Apr. 6, 1920.

3 SHEETS-SHEET 3.

. INVENTEIR M Mm \Nlmzssas HIS ATTEIRNEY illustrate the ARTHUR W. SMITH, OF NEW YORK, N. Y., COMPANY, OF ILION, NEW YORK,

ASSIGNOR TO REMINGTON TYPEWRITER A CORPORATION OF NEW YORK.

TYIfEWRITING-MACHINE.

To all whom it may concern.

Be it known that I, ARTHUR W. SMITH, citizen of the United States, and resident of the borough of Manhattan, city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Typewriting-Machines, of which the following is a specification. a

My present invention relates to carriage feeding or escapement devices for typewriting machines, and its general object is to provide new and improved devices of the character specified.

To the above and other ends, my invention consists in the features of construction, combinations of devices, and arrangements of parts to be hereinafter described and particularly pointed out in the appended claims. I

In the accompanying drawings. which preferred form of my invention,

Figure 1 is a front to rear vertical sectional view of a typewriting machine embodying said invention, parts of said machine beingomitted and parts broken away.

Fig. 2 is a fragmentary rear elevation of said machine.

Fig. 3 is an operating view showing in rear elevation parts of the escapement in normal position, the escapement being set for ordinary feed.

Fig. 4 is a view corresponding to Fig. 3 but showing the parts as they are related when a printing key or the space bar is depressed.

. Fig. 5 is an operating view showing the normal position of the parts of the escapement when set for reverse feeding.

Fig. 6 18 a "iew corresponding to Fig. 5 but showin the parts as they appear after a printing key is depressed.

Figs. 7 and 8 are operating views showing the positions of the parts during the return or reverse movements of the carriage.

Fig. 9' is a perspective view of the escapement rocker or anchor member.

Fig. 10 is an enlarged detail view.

Fig. 11 shows in section details of the bearing for the anchor member ordog rocker or carrier.

A's appears from Figs. 1 and 2, the main frame of the machine comprises a base 1, posts 2 and a top. plate 3, above which is Specification of Letters Patent.

Application filed July 11 1918.

"ranged to rotate in a Patented Apr. 6, 1920. Serial No. 244,364.

mounted a traveling carriage (not shown) which provides a support for a grammatically illustrated in ig. 1. Cooperative with the front face of the platen are type bars 5, this set of type bars being arranged in a segment of a circle pivotally supported on a segment 6. Bell cranks 7 pivoted at 8 are operatively connected with the type bars, said bell cranks being actu ated by key levers 9, the key levers being pivoted in the rear of the base and each being provided at its front end with a printing key or cap 10. Forward of the bank of printing keys is arranged a space key or bar 11 which is in effect a cross bar that connects the forward ends of two parallel arms 12 that are fixed at their rear ends to upstanding projections 13 that are in turn fixed to a rock shaft 14 that bears inthe sides of the base 1. A central arm 15 is fixed toand extends rearward from the rock shaft and is connected, as hereinafter described, with the escapement mechanism. Coiled springs 16, surrounding the rock shaft near its ends, restore the spacing key and connections to normal positions after operation. The type bars 5 are adapted to operate'a curved universal bar 17- that is supported on the segment 6 and has projecting rearward from it arms 18 that are pivotally connected at 19 to upstanding arms 20 fast on a rock shaft 21, said rock shaft bearing on screw pivots 22 that are supported on lugs 23 depending from the top plate. An arm 24, extending rearward from said rock shaft between its ends, is connected with the escapement devices as hereinafter described.

Said escapement devices comprise a circular rack or escapement wheel 25 that is arvertical transverse plane and is provided with teeth 26 beveled on their rear or non-working faces. The escapement wheel is fixed to a forwardly extending shaft 27 that bears in a bracket 28 fixed to the top plate, said shaft being provided at its forward end with a pinion 29.

that meshes with a rack 30 mounted on the traveling carriage. The carriage is constantly urged toward the left by a carriage motor or spring drum not shown, but which may be of any desired construction.

Cooperative with the escapement wheel are dogs 31 and 32 that are supported on a pivoted dog carrier or anchor member 33 arranged below the escapement' wheel and platen 4 dia- I best lllustrated in Fig. 9 the anchor member comprises an anchor block 34 that is pro-" vided at its ends with kerfs 35 and 36 in which the dogs 31 and 32 are seated, the dog 31 being provided with a pivot 37 and thedog 32 with a pivot 38. In addition to the anchor block the anchor prises an arm 39 that is secured to the under side of the block by two screws 40 and extends horizontally forward, terminating in an upstanding cross piece 41 that is provided near its ends with two connecting openings and centrally with a bearing openin 42. Projecting upward from the sides of the arm 39 are stop fingers 43 and 44, these fingers being slightly curved or bent inward at their upper ends. As appears from Fig. 11 the anchor member 33 bears on a shoulder screw 45 that is threaded into an eccentric support 46 that in turn is from the-bracket 28 for the escapement wheel. Said pivot screw 45 has a shouldered portion 45 that passes through a bearing opening in the anchor block 34 and on which 49 that is seated in a depression at the bot'- tom of the upper portion of the'slot or kerf said anchor block bears and at its forward end has a reduced bearing portion 45 that cooperates with the bearing opening 42. The block 46 is threaded into the lug 47 and is adjustably held in a fixed relationship therewith by a locking nut 48. The opening in said bearing block through which the pivot screw 45 passes is eccentric to the axis of the bearing block and consequently by turning the bearing block slightly and then looking it in its reset position the pivotal axis of the anchor member may be moved up or down to vary its relationship to the escapement wheel axis with which it is parallel. The shoulder 45* is screwed tight against the rear end of the bearing block 46, thus fixing the screw 45. The anchor block 34 is loosely confined between the block 46 and the head of the screw 45, so that while the anchor member may turn freely on the screw or bearing 45, it is held against movement endwise thereof. As best shown in the series of views from Fig. 3 to Fig. 8, which it will be borne in mind are rear views, the dog 31, which is the left-hand dog, viewed from the rear; is shaped somewhat like a bell crank and is pivoted about centrally between its ends. Cooperative with'the upper arm of said dog is a coiled pressure spring 35; said spring tends to maintainthe lower arm of said dog in contact with the upright face 35 of the kerf, which face serves as a stop for the dog. When the dog normally engages with this stopface the escapement isset for ordinary feed, as will be hereinafter more fully explained. Provision is made for reversing the feed or changing member comtion illustrated in Fig.

secured in a lug 47 integral with and extending downward.

l mit step-b'y-step movements face 35*. Said devices comprise a spring finger 50 that is secured to the under face of the anchor block 34 by two screws, one being numbered 51 and the other being the lefthand one of the two screws 40. The tendency of the spring finger 50 is to spring downward away from the under face of the block so that it is out of the ath of the tail of the dog 31 as in Fig. 3. lay screwing in on the screw 51, however, the stop finger 50 may be forced upward so that its left-hand end is in the path of the tail of the dog 31 and will normally hold the dog in the posi- 5. The right-hand or stepping dog 32 is pivoted near its lower end to the pivot pin 38, the upper end of said dog being inclined along its working face and the lower portion to the left of its pivot being straight, as indicated at 32 Arranged between the dog 32 and the face of the kerf 36 is an interposed member or pendant 52 that is pivoted'at 53 near its upper end, said pendant being arranged substantially parallel with the dog 32, its lower right-hand face being adapted to cooperate with the face 32 of said dog. The axes or centers of rotation of the member 52 and the dog 32 bear a constant or unvarying relationship to each other. A -c'oiled spring 54, seated in a depression 55 in the anchor block 34 cooperates with the left-hand face of the pendant below its pivot and constantly urges it outward or toward the right, as viewed from the rear. The round or hearing portion of the pendant that. surrounds its pivot is accommodated in-a recessed or offset portion of the dog 32 above the straight portion 32. The pendant interposed between the spring 54 and the'dog 32 serves to transmit the pressure or effect of the spring to the dog, theconstruction being such that the'spring will resist the turning of the dog in either direction about its pivot,

as will be better understood from what fol lows. Acting through the pendant, moreover, the spring tends to center the dog or 11 maintain it in a neutral or central position. Motion is transmitted to the rocker or anchor member to cause the dogs -tocooperate with the escapement wheel ,toperof the carriage 12 The right-hand by a pair of parallel links.

link 56, viewed from the rear. is pivotally connected at its upper end with the righthand end portion of the cross bar or arm 41, the lower end of said link being bifurcated 25 as indicated at 57, the bifurcated portions 57 being connected by a cross pin 58 (Figs. 1 and 2) that engages in a slot 59 in the arm 24, the slot being openat its lower end and the construction affording a lost motion connection between the arm and the link so that while the motion communicated to the arm from the universal bar 17 is transmitted to the link and thence to the dog rocker, nevertheless it is possible to rock the. rocker and move the link 56 idly without affecting the universal bar and its connections. This additional means for rocking the rocker comprises a link 60 at the left of the link 56, the link 60 being pivotally connected at its upper end to the left-hand portion (viewed from the rear) ofthe cross bar 41, the lower end of the link 60 being connected to the arm 15. This lower end passes through an opening in the arm and is provided with adjustable nuts or stops 61 and 62 (Fig. 1), the nut 62 being below the arm and the nut 61 above it, and the construction afi'ording a lost motion connection between the link and the arm so that the arm 15 may transmit movement to the link to push it up and rock the rocker when the space bar or key is actuated, and yet when the rocker is actuated by a type bar or printing key the space bar will not be affected, but only the link 60. With the mechanism set for ordinary feed the normal position of the parts is illustrated in Figs. 2 and 3, at which time the stop 43 is engaged with the side of the lug 47 and the dog 82 is engaged with a tooth of the escapement wheel and the dog 31 is disengaged. The parts are maintained in this position by a coiled spring connected to the cross arm 41 to the left of its pivot viewed from the rear, the lower end of said spring being anchored to an angular bracket 33 secured to and depending from the top plate. From what has been said it will be understood that the rocker may be rocked by actuating a printing key and pulling down the link 56 or actuating the space key and pushing up the link 60. W'hen the rocker or anchor is thus actuated, it will be turned on its axis 45 until arrested by contact of the stop 44 with the side of the lug 47, causing the dogs to swing in the plane of the escapement wheel and carrying the dog 32 out of the path of the teeth 26 and the dog 31 into the path of said teeth. With the dog 31 set as described, this swinging movement will carry said dog 31 into the path of the escapement wheel tooth that is slightly to the right of said dog in Fig. 3. 'The drop from one dog to the other is slight so that the movement of the escapement wheel-transmitted to the carriage as a result of the' disengagement of one dog and the engagement of the other is practically negligible. As soon as the dog 32 is disengaged, the spring 54 becomes effective through the pendant 52 to' swing the upper arm of the dog 32 rightward on its pivot until the neutral position is reached, as is illustrated in Fig. 4. This swinging movement of the dog 32 carries the point 5 position, by setting movement of the carriage, this stepping movement of the carriage taking place during the return movement of the printing key or space bar, orin other'words, providing for what is termed the ordinary escapement. g

In order, to give a reverse feed the dog 31 is set, as has been described in the Fig. the spring finger or stop 50 in operative position, as shown in said figure. As a result of this resetting of the dog 31, its upper end or engaging portion will be swung slightly rightward, as viewed from the rear, so that when the rocker or anchor is operated by the depression of a key, said dog will pass behind instead of in front of the proximate escapement wheel tooth, thus affording a stepping movement of the carriage during the key depression. The dogs are so related that on the return movement of the anchor to normal position the dog 32 will pass in front of instead of behind the proximate wheel tooth, as will be plain from Fig. 6, so that there will not be a feeding movement of the carriage on the return of the key.

The escapement wheel is fixed to its shaft, as has been explained, and the usualratchet box is dispensed with, the present construction afiording, however, a return movement of the carriage without obstruction from the escapement devices, this being due primarily to the double action of the spring 54 through. the pendant 52. lVith the dog rocker in normal position, should the carriage be returned toward the right, causing the escapement wheel to turn in the direction of the arrow, Fig. 7, the teeth of the escapement wheel will engage with the stepping dog or pawl 32 and force the upper end of the dog rightward, as viewed from the rear in Fig. 7, against the resistance of the spring 54 as applied to the tail or lower end of the dog through the lower end of the pendant. of the parts just prior to the release of the pawl by the engaged tooth of the escapement wheel. It will be plain that as soon as the dog is released the spring 54 will tend to restore it to normal position but as long as the return movement of the carriage continues, the upper end of said dog will be continually swung rightward to aflr'ord passage for the teeth of the escapement wheel.

Fig. 7 illustrates the position i In other words, the dog or pawl will click rapidly over the teeth of the wheel as it is turned, without obstructing the movement of the carriage. The end of the slot or kerf 36 serves as a stop that will cooperate with the tail of the pendant 52- to prevent overthrow, or limit the outward swing of the dog 32. It will be observed that from the neutral position the stepping dog may be swung in opposite directions against the resistance of the spring 54, the contact faces of said dog and the pendant separating or opening angles from opposite ends.

It sometimes happens that the operator will depress a printing key before the carriagc has been fully restored to its righthand position. In such event the anchor will be rocked, bringing the holding dog 31 into the path of the escapement wheel, but the carriage movement will not be obstructed for the reason that the dog 31 is adapted to yieldwhen acted on by the back of the escapement wheel teeth, compressing the spring 49, as illustrated in Fig. 8, and permitting the return movement of the carriage to continue uninterruptedly.

Various changes may be made without de parting from my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In escapement mechanism for writing machines, the combination of a carriage, a rack, a dog carrier mounted to reciprocate in the general plane of movement of said rack, and a pair of dogs mounted on said carrier in the general plane of said rack, one of said dogs being adapted to yield-to the rack teeth both during advance and return movements of said rack, and the other of said dogs being adapted to yield to said rack teeth in one direction only.

2. In escapement mechanism for writing machines, the combination of a carriage, a circular rack, a dog carrier mounted on an axis parallel to the axis of said circular rack, and a pair of dogs mounted on said carrier in the plane of said rack, one of said dogs being adapted to yield to the rack teeth in both directions of turning movement of said circular rack and the other of said dogs being adapted to yield in one direction.

3. An escapement mechanism for writing machines comprising devices for converting the escapement from ordinary to reversefeed and vice versa, said devices comprising a spring stop and a screw for" variably setting said spring stop.

4. An escapement mechanism for writing machines comprising devices for converting the escapement from ordinary to reverse feedand vice versa, said devices comprising a spring finger cooperative with the tail of one of the escapement dogs, and means for setting said spring finger so that it is outfeed and vice versa,'said devices comprising two stops, each adapted to cooperate with one of the dogs of the escapement, one of said. stops being settable into and out of the path of-movement of its associated dog, the setting of said stop taking place independently of the other of said stops.

6. An escapement mechanism for writing machines comprising a pair of pivoted dogs, and devices for converting the escapement from ordinary to reverse feed and vice versa, said devices comprising a stop for one of the dogs and means for moving said stop substantially radially of said dog and away from its pivot and for maintaining said. stop set out of the path of said dog and thus preventing said dog from cooperating with said stop to change the character of the escapement from reverse to ordinary feed.

7. An escapement mechanism for writing machines comprising a pivoted dog, a spring exerting pressure constantly in one direction, and means for rendering the spring pressure eii'ective on said dog at opposite sides of its pivot at different times.

8. An escapement mechanism for writing machines comprising a pivoted dog, a spring, and means for rendering the spring efl ective on said dog at opposite sides of its pivot,

said means comprising a pivoted member interposed between said spring and said dog. 9. An escapement mechanism for writing machines comprising a pivoted dog, a spring,-

and means for rendering the spring "effective on said dog at opposite sides of its pivot,

said means comprising a member arranged a parallel with said dog and interposed between saiddog and said spring.

10. An escapement mechanism for writing machines comprising a pivoted dog, a spring, 7

and means for rendering the spring effective on said dog at opposite sides of its pivot, said means comprising a member with wh ch said spring directly cooperates.

- ways in the same direction about its pivot,

said pivot having a constant relationship with the pivot of said dog.

12. An escapement mechanism comprising a rack, a dog, a single spring, and a member for transmitting the pressure of said spring to said dog, said dog and said'memher being rotatable about diflerent centers which have a constant relationship with each other, said member being effective to arrest said dog in the position from which it may be moved oppositely by the teeth of said rack against the resistance of said spring which always acts to press said member in the same direction.

13. An escapement mechanism for writing machines comprising a pivoted dog, a spring, and a pivoted pendant interposed between said spring and said dog, said pendant being effective to hold said dog in a neutral position and also enabling said dog to be swung in opposite directions about its pivot in opposition to the pressure exerted by said spring, the direction in which the said pendant is pressed by said spring being always the same.

14. An escapement mechanism for writing machines comprising a pivoted dog, a spring, and a member arranged parallel with said dog and interposed between said dog and said spring, the construction enabling said dog and said member to be moved to open angles between them, the angle at one time extending outward from one end of said dog and from one end of said pendant. and at another time extending outward from the opposite end of said dog and the opposite end of said pendant.

15. In a typewriting machine, the combination of a rack, a pair of dogs, a pivoted dog carrier, printing keys, a space key. means between said printing keys and said dog carrier for pulling on said dog carrier to cause it to operate, and means between said space key and s2 id dog carrier for pushing against said dog carrier to cause it to operate.

16. An anchor escapement for writing machines comprising an anchor member, parallel links connected to said anchor at opposite sides of its pivot, a printing key. a train of connections between said key and one of said links, a space key, and a train of connections between said space key and the other of said links.

17. An anchor escapement for writing machines comprising an anchor member. paralsaid anchor at oppolel links connected to site sides of its pivot, a type bar operated universal bar connected to one of said links, and a space key connected to the other of said links.

18. An anchor escapement for writing machines comprising an anchor member, parallel links connected to said anchor at opposite sides of its pivot, a type bar operated universal bar, arms extending rearward therefrom, a rock shaft, arms extending upward therefrom and pivotaily connected to said first recited arm, an arm extending horizontally rearward from said rock shaft and connected to one of said links, and a space key connected to the other of said links.

19. An anchor escapement for writing machines comprising an anchor member, parallel links connected to said anchor at oppo site sides of its pivot, lost motion connections between one of said links and the printing. mechanism andlost motion connections between the other of said links and the spacing mechanism of the writing machine.

20. An anchor escapement for writing machines comprising an anchor member, parallel links connected to said anchor at opposite sides of its pivot, a rock shaft, an arm extending rearward therefrom and having a lost motion connection with one of said links. parallel arms connected to said rock shaft and extending forward therefrom. a space bar connecting the forward ends of said parallel arms, and printing mechanism effective to operate the other of said links.

21. An anchor escapement for writing machines comprising an anchor member having a body portion on which the dogs are supported, and an arm 01' portion extending from the body portion and terminating in a cross portion to opposite ends of which the actuating devices are connected.

22. An anchor escapement for writing machines comprising an anchor member having a body portion on which the dogs are supported, an arm or portion extending from the body portion and terminating in a cross portion to opposite ends of which the actuating devices are connected, and stop fingers extending in parallelism from the sides of said arm portion and cooperative with a fixed part to limit the rocking movements of said anchor member.

23. In escapement mechanism. the combination of an escapement wheel, a dog carrier, a pivot therefor, and a rotary bearing for said pivot. said pivot being eccentric to the center of said bearing and said bearing being settable to vary the relationship of said dog carrier to said escapement wheel.

24. In a typewriting machine, the combination of an escapement wheel. a pair of dogs therefor, one of said dogs being pivoted and spring pressed, and two stops for said dog one being fixed and "the other movable. said stops being usable'in alternation to obtain at will either ordinary feed or reverse feed; said dog being turnable on its pivot to a different normal position from that which it occupies when set to cooperate with the fixed stop. and said movable stop when adjusted for use operating to maintain said dog in said different normal position.

Signed at the borough of Manhattan. city of New York, in the county of New York and State of New York this 9th day of July, A. D. 1918.

ARTHUR W. SMITH-l \Vitnesses CHARLES E. SMITH, E. M. WVEnLs.

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