US1488519A - Typewriting machine - Google Patents

Description

April 1, 1924..

G. A. SEIB TYPEWRLTING MACHINE 2 shee-sheet i Filed Aug. 2l, 1922 gnou/woz 461,004 iw/L WWNESEEE 5.7 W1. MLK/.

April 1 1924;

G. A. SEIB TYPEWRITING MACHINE Filed Aug. 2l

1922 2 Sheets-Sheet 2 WITNEEEEE gnou/woz Z, W. fm 2M@ V f* @311g LA @Hoff/mm3 'of typewriting machines, and its general Patented Apr. 1, 1924.

UNITED STATES PATENT fol-Fic GEORGE A.. SEIB., OF ILION, NEW YORK., ASSIGNOB TO REIHIIIN'GTTON`TYPIEIWBJIEL`IELR COM- PANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK. v

TYPEWRTTTNG MACHINE Application led August 21, 1922. Serial No. 583,859.

To all whom it may concern.'-

Be it known that I, GEORGE A. SEIB, a citizen of the United States, and resident of Ilion, in the county of Herkimer and State of New York, have invented certain new. and useful Improvements in Typewriting Machines, of which the following 1s a specification. l

My present invention relates to controlling and arresting means for the type bars object is to provide new and improved mechanism of the character specified and which results in checking `the speed of the type bar and in arresting it prior to the printing moment with a minimum of noise, and with the further result `that, it is promptly thrown away from the platen after printing contact, leaving a clear imprint.

To the above and other ends which will hereinafter appear, 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 claims.

In carrying out my invention in the present instance I provide in connection with an escapement-actuating universal bar which is operated directly by the type bars, yieldable arresting devices which comprise a stationary stop and ya co-operative stop movable by the universal bar through a train of connections, causing the two stops to co-act to substantially arrest the universal bar as each typebar nears the printin point. As the stop devices associated wit the universal bar are yieldable, the ty e bar is checked, but is not brought to a dea stop. It continues its movement towards the platen at reduced speed, finally contacting with a separate stop or arresting device which is preferably in the form of the coiled wire stop disclosed and claimed in m copending application Sr. No.- 571,154, filed June 2a, 1922. This last named arresting device or anvil with which the type bar contacts atreduced speed, further checks the type bar but also preferably yields slightly, finally, however, arresting the type bar just prior to the instant of printing. While of course not limited to any specific points at which the devices embodying my invention become effective, I have, nevertheless, found it desirable in practice to cause the co-operating stops for the universal bar-to contact after theY loose dog of the escapement has disenga ed from the escapement wheel and when t e active type isbetween oneelghth and one-tenth of an inch of the platen, whilev thety e bar itself subsequentl v contacts directlly with the wire stop or cab e anvil when the active type Iis about .O05 of an inch away from the platen. Although the stop or bumper devices associated with the universal bar may be employed without the sto or anvil that directly arrests the type Ibars, nevertheless Il have found that highly satisfactorily results are obtained by employing the two separate4 stops in combination, and prefer so to employ them.y

My present invention will be described in detall 1n connection with the accompanying drawings, wherein- Figure 1 is a fragmentary front to rear vertical sectional view of a No. 10 Remington typewritin machine embodying the preferred form o my invention. V

Fi re 2 is a lfragmentary horizontal sectiona `view taken on a lane indicated by the section line 1--1 in Figure 1 and looking downward in the direction of the arrows at said line.

Figure 3 is a fragmentary perspective view of one of the universal bar stop devices and its mounting.y

Fi re 4 is a erspective view of the universa bar stop evice shown detached.

Figure 5 is a fragmentary7 view on an enlarged scale showing the relationship of the advancing type to the rinting face of the platen at the momento contact between the type bar and its stationary arresting device or anvil. i f

Figure 6 is a fragmentary view of a modification; and

Figure 7 is a corresponding view of another modification.

Referring first to the preferred construction illustrated in Fi l 1-5 inclusive` the main frame of the mac ine comprises a base 1, posts 2, and atop plate 3 above which is mounted a traveling carriage (not shown) carrying a platen 4, the step-by-step movements of the carriage being controlled by escapement devices comprising a dog-carrying rocker 5 having stationary pivots 6 and connected by a link 7 with key operated universal bar mechanism. Said mechanism upstanding arm comprises a rock shaft 8 which bears at its ends on screw pivots 9 mountedon brackets 10 depending from the top plate. Rising from the rock shaft near its ends are integral arms 11 having forked or slotted upper ends, and between the arms 11 is a third 12 which is also integral with the rock shaft, said arm 12 having a forked upper end which receives a screw pin 13 engaged by the slotted forward end of the link 7, which thus connects the dog rocker 5 with the rock shaft 8. Said rock shaft is also connected with a universal bar frame comprising a universal bar proper 14 and arms 15 integral with and extending rearward from the universal bar between its ends, the rear end portions of the arms l5 being pivotally connected with pins or screw pivots 16 which bridge and are mounted on the forked upper ends of the arms 11,\the arms 15 fitting loosely in said ends. The universal bar 14 is curved or arcuate and is adapted to be directly actuated by each and all of the set of type bars. Said universal bar is housed or seated in an arcuate groove or slotway indicated at- 17 formed in the rear face of an upright type bar support or segment 18 which is mounted on the framework of the machine. Centrally the universal bar is provided with an upstanding lip 19 which carries a guide pin 20 that engages in a hole indicated at 2l in the segment 18. The construction is such that.

when the universal bar is moved bodily rearward its integral arms 15 will move with it,

and through the pivotal connections 16 will rock the shaft 8, this rocking motion being transmitted to the arm 1l which in turn through the link or connector 7 will turn the dog rocker on its pivots 6 and actuate the escapement mechanism, as is usual in the Remington machine.

The type bars are arranged in an arc of a circle below the platen. Each type bar 22 normally rests on a pad 23 and is provided with a type head 24 carrying two types 25 and 26. A fulcrum wire 27 provides a ivot which is common to all ofv the type ars, said fulcrum Wire being arcuate in f shape and being supported on the segment 18. The heel portion of each ltype bar 22 is formed in rear of its pivot With a cam slot, indicated at 28, with which co-operates a in or actuator 29 fixed to and projecting aterallyvfrom the upper end of a bell crank lever 30 which is guided in a slot, indicated at 31, formed in a cross bar or bracket 32 which extends transversely of the base frame 1 and is detachably secured to the side portions thereof. The bell cranks 30 are fulcrumed on a wire 33 that is mounted on the cross bar or bracket 32, said wire bridging the slots 31 and providing a common pivot for all of the bell cranks 30. The fulcrum wire 33 is retained in place by a retaining plate 34 which is arranged under the cross bar 32 and is fingers or lugs 35 which extend upward through a slotway in the cross bar 32 and serve to support the fulc-rum wire 33 between the slots 31 in said cross bar, the re-V taining plate 34 being secured to said cross bar by screws 36. rI he short arm of each bell crank 3() is pivotally connected at 37 with a key lever'38 provided with a finger key 39, the set of keylevers being pivoted on a fulcrum plate 40 in rear of the base. When one of the key levers is actuated, it operates through the described train of connections, including the bell crank 30, pin 29 and cam slot 28, to actuate its type bar 22 and swing it from its position of rest against the pad 23 upward and rearward into printing Contact with lthe front face of the platen 4. As\ the type bar nears the platenthe contact or engaging face 22a with whlch it is formed forward of its pivot 27 engages provided with with the universal bar 14 and moves it reari* ward, causlng said universal bar to actuate the dog rocker 5 and the other elements of the escapement mechanism in the manner described above.

In order to elimina-te as far as possible the noise resulting from the impact of the type' bars 1 against the platen, means are provided to check or greatly reduce the speed of the actuated type bar as it nears the platen. In the present instance I employ for this purpose devices comprising arresting means for the universal bar, said means being adapted to yield or give slightly under the impulse of the advancing type bar so that while checking the type bar the univer-1y sal bar may still move or give sufficiently toA the type bar to permit it to print. The arresting means for the universal bar comprises two co-acting stop devices, one stationary and one so connected with the universal bar as to be moved thereby into contactive engagement with the stationary stop. The stationary stop is in the form of a Y- shaped bracket comprising two angularly disposed branches 41 terminating in parallel extensions 42 formed with slots 43, the branches 41 at their junction being provided with an upstanding ledge, contact or stop device proper 44. The stationary stop member 41-44 is secured to the under 4face of the retaining plate 34 by certainof the screws 36, said screws passing'through the slots 43 and acting to adjustably clamp the stop' member to a stationary part of the machine, viz, the bracket 32. The screws when loosened'permit the stop member to be moved either forward or backward so as properly to locate the contact stop 44. The stop device that co-operates .with the1 stop 44 is in the form of an arm 45, preferably trough-shaped in cross section in order to promote stiffness. Said arm is seintegral with the rock insane cured lat its upper end by headed screws 46 to an enlargement or 1u 8 preferably cast saft 8 at about the middle of its rear side. The face of the lug is machined to enable the arm 45I to be closely fitted thereto and then clam ed b the screws l46 so that said arm is rigld wit the rock shaft. To the lower or free end of the arm 45 is secured, as by a rivet 47,

a pad 48 of sound deadening material, such as leather, liber or the like. The ad is in the form of a strip which is folde and a plied to the central part of the troug shaped arm 45 between its side ed e por- 15 ftions, the rivet passing through bot folds or plies of the insulating material or pad 48 and through the central part of the arm 45 as well. The construction is such that the lower padded end of the arm 45 will contact wit the stop proper 44, the leather ply or fold at the rontside of the arm 45 contacting directly with the rear face of the ledge or stop proper 44 when the shaft 8 is rocked during the operation of the universal bar by the type bar. The parts are so timed that the stop devices 45, 48 and 44 for thev universal bar vlvlill cone lilntc con tactive engagement, as s own y t e otte lines in Flg. 1, after the dog rocker 5 has been rocked suiciently to carry the usual stepping dog out of engagement with the escapement wheel. In other words, Athe slowing up of the universal bar as a result of the enga ment of the stop devices 44 and 45,- 48 oes not slow' up or otherwise affect the carriage feeding or escapement v devices. The result of the contactlve enwith the platen is permitt gagement of the sto devices 48 and 44 is partially toarrest t e universal bar 14 as .well as the actuated type bar 22 which is in contactive engagement at its. face 22 wl'ith said unierlal bar. l the time the sowing up o t e parts 'ns t e ty bar will be in the position ilustrated g; heavy dotted lines in Fig. 1'. The further advance of the type bar to eprinting contact in the present instance by reason of the yield or give in the parts or train of connections extending from the universal bar 14 to the int/of contact between the sto contact 44. 0 course if the parts were l 'entirely rigid theuniversal bar, as well as the type bar, would be eiectually 'arrested and brought to a `dead stop as soon as such contact takes place. However, the yield or give in the joints ofthe train and the spring of thev parts or members composin the train, are suilicient to permit the comp etion of the printing movement of the type barA at reduced s eed owing to the absorption of a considerab e portion of the momentum of the type bar in overcominl the resistance of the universal bar and gie univerml bar arresting devices. As a result, the printing which pad` 48 an the stationaryv blow of the type bar is softened and the noise largely done away with. It will be understood that I have described above only one of the methods which might be employed to cause the universal bar to check the type bar without bringing it to a dead lof, this direct arresting device for the type bar serving to take out the vibrations and also to promote the s d of retraction of the type bar from the p aten, these things promoting a clear sharp type impression of the type. Accordingly I preferto employ in addition to or in combination with the arresting devices outside the path of the type bars as well as of the universal bar, an 'additional device lying in the path of the type bars and with the type bars themselves may contact 44, 48 which are disposed.

directl ,and I have found that a type bar arresting device or coiled wire anvi of the character disclosed in my prior application, Sr. No. 571,154 aforesaid, gives highlly satisfactory results. As illustrated in ig. 1 herein, said type bar arresting device is in the form of a com und wound spiral wire stop 49 within which is a core 50 composed of an oppositely wound compound wire, the

aiz'restix'mg device or anvil 49, 50 being seated 1n an arcuate groove or depression, indicated at 51', formed in the front face of the type bar segment 18 and being retained in said seat by a late 52 detachably secured to the segment. 49, 50 projects slightly beyond the face of the segment and is so related to the arresting devices 44, 48 that .the type bar will contact with the anvil 49, 50 after thecontactive engagement of the stops 44, 45, but before the printing type has struck the platen. This relationship or timing of the parts is brought out clearly b the dotted lines .in Fig. l. The heavy dotted line shows the position of the type bar when the arresting devices ifor the universal bar contactively engage, while the lightdotted line shows the advanced position of lthe t pe bar when it contactivelyengages with t e cable anvil 49, 50 This latter position is further illustrdfed by the enlarged diagrammatic view he contact face of the anvil- 5,'from which it is clearly apparent in- F that lle printing type although very close to the platen has not quite reached or 'conf tacted with it at the time the cable anvil comes into play. Printing contact of the 4advancing type with 'the'platen is permitted to some extent by reason ofthe yield of the elastic or resilient anvil 49, 50, the reaction being of the anvil adding to the speed with which the type bar is retracted after printing. Of course the employment of the yielding cable anvil as an additional arresting device further results in reducing the speed of the type bar and softening the blovs7 thereof, so that the noise resulting from its impact against the platen or the paper thereon is in a large degree eliminated as the `result of the combined use of the two independent stop means, one for the universal bar and one for the type bar itself.

While as stated it is preferred to employ universal bar arresting means in combination With a yielding or spring anvil 49, 50, as illustrated in Fig. l, nevertheless good results are obtainable by the employmentof a different style of anvil in combination with the universal bar arresting means. Fig. 6 illustrates a modified construction Wherein the yielding anvil of Fig. l is replaced by a sblid anvil or arresting device, the construction otherwise being the same as the Fig. l construction including the universal bar arresting-means. As shown in Fig. 6 the type bar segment 53 may be provided With an arcuate sto or anvil 54, this anvil solid and pre erably, as is usual, cast integral with the segment and projecting from the front face thereof in the form of a rib or abutment. Asl stated this solid anvil or stop 54 replaces the yielding anvil of the prior construction. The solid anvil is preferably set slightly to the rear of the position occupied by the arresting face of the spring anvil, or in other words, the vertical plane of the striking face of 54 is closer to the vertical printing plane passing through the printing point at the front side of the platen, this closer setting of course being for the reason that/there is no yield in the solid anvil. As in the prior construction the anvil 54 comes into play or arrests the type bar after the speed of the type bar has been checked by the universal bar and its stop arresting means.

4A further modification is illustrated in Fig. 7, thetype bar support or segment 55 therein shown being Without any anvil or arresting device for the type bar, this construction depending solely on the universal bar and its arresting means 44, 48 to check the type bar sufliciently prior to its printing contact with the platen.

Various other changes besides those described m'ay be made Without depart-ing from my present invention.

It will be observed that by my present invention l have provided a key actuated type bar and a universal bar adapted to be operated when the type bar key is actuated, in combination with a stop for substantially arresting or checking the universal bar bei fore the type bar reaches the platen, and a separate stop for the type bar; that stop means or devices are provided for substantially arresting or retarding both the universal bar and the type bar, the universal bar being arrested before the arrest of the type bar and being adapted to yield or give to a certain extent after it is arrested, the type bar stop in its preferred form also being adapted to yield slightly after being engaged by the type bar; that tivo separate and distinct arresting means are provided for the type bar one operating after the other, one of said means operating directly on the type bar without the interposition of other mechanism, and the other means having what may be called an indirect action, that is to say, the coacting stops (in the present case 48 and 44) are out of the path of the type bar but act to arrest another part or member, viz, the universal bar, `which lies in the path of the type barj that a. stationary type bar stop is provided that is interposed directly in the path of the type bar, and a second stationary stop which is disposed outside of the path of movement of the type bar, in combination With a contact device or universal bar Which is operated directly by the'type har, and also a train of connect-ing devices (comprising in the present case arms 15, arms 11, rock shaft 8, arm 45 and stop 48) which are arranged between the contact device and universal bar and said second stationary stop; that the described construction provides means for arresting the universal bar before the completion of the type stroke; that said universal baris actuated in the vpresent instance by the type bar itself and that its arrest takes place before the type bar completesits printing movement and contacts With the platen; and that the uni- .versal bar is actuatable directly by the type bar and is associated With yielding stop devices Which are adapted to co-operate before the type bar strikes directly against the anvil, the yielding stop devices operating to check the speed of the type bar before its contact With the anvil.

What Iclaim as new and desire `to secure by Letters Patent, is

1. In a typewriting machine, the combination of a platen,l a t pe bar, a key for actuating said type ar, a universal bar adapted to be operated when said key is actuated, a stop for arresting said universal bar before the type bar reaches the platen, and a separate anvil stop device directly contactive With the type bar.

2. In a typewrliting machine, the combination of a platen, a type bar, a key for actuating said type bar, a universalbar adapted to be operated when said key is actuated, stop devices for arresting the universal bar, and an anvil stop for the type bar, the uni'- versal bar being arrested by its stops before the arrest of the type bar by the anvil stop.

3. lin a typewriting machine, the combinamg said ty tion of a platen, a type bar, a key for actuatbar, a universal bar adapted to` be operate when said key is actuated, stos devices for arresting the universal bar, an

an anvil stop device for the type bar, the universal bar being arrested before the ai'- rest of the ty bar but being adapted to yield or give a ter it is arrested and the anvil stop device for the typz bar being adapted to yield slightly after ing engaged by the type bar.

4. In a typewrit' machine, the combina.-

. tion of a p aten, a ey operated type bar,

Afor arresting 'tion of a platen,

Ya curved universal "means includiia rock shaft for supporting escapement devices including a universal bar directly operated by said type bar, a stop said universal ar before the type bar reaches the platen, and a separate gnvil device directly engageable by the type ar. 5. In a typewritin machine, the combination of a p aten, a ey operated type bar and two separate arresting means for sai type bar, said means, complrising an anvil tly co-operative with t e type bar.

6. In aty ewritin machine, the combination of a ten, a ey operated type bar, .and two stinct arresting means for said ty bar, said means operating one after the otgr and comprising an anvil with which the t pe bar directly engages.

7. In a t writing machine, the combination of a p ten, a ey operated type bar, and two distinct yieldable arresting means for said type bar, said arresting means comrisin an anvil with which said type bar irect e 8. Iii a machine, the combination of a platen, a key operated ty bar, a stationary type bar anvil interposefdirectly in the path of the t bar, a second stationary type bar stop sed outside of the path of movement of e type bar, a contact device operative directly by the type bar, and a train of devices arranged between said contact device and ,said second stop.v

9. In a typewriting machine, the combinaa curved universal bar, a key actuated t pe bar effectiveto operate said universal ar, means including a rock shaft for supporting said universal bar, a sto arm ro]ecting from saidv rock shaft, an a stationary bracket having a contact face adapted for co-operation with arm, said bracket being adjustable to vary the position of said contact face.

10. lIn a ty writing machine, the combination of a aten, a key actuated type bar, bar operative thereby,

said universa ar, a stop arm rigid with said rock shaft and provided witha pad of sound deadening material, and a stationary stop with which the padded portion of'saidA stop arm is adapted to contact to arrest said universal bar..

Said stop i said universal bar; and a 11. In a typewriting machine, the combination of a platen, a key actuated type bar, a curved universal bar operative thereby, means including a rock shaft for supporting said universal bar, a stop arm rigid with said rock shaft and provided with a pad of sound deadening material, and a Y-shaped bracket Slotted to accommodate screws whereby it is adjustably secured to a stationary part, said bracket being provided with a stop face engageable by said pad to arrest said rock shaft and said universal bar.

12. In a typewriting machine, the combination of a platen, a type bar, a wire anvil therefor, a universal bar actuatable by said ty e bar and yielding stop devices associate with said universal bar; said stop devices being adapted to co-operate before the type bar strikes the wire anvil.

13. In a typewriting machine, the combination of a platen; a key actuated type bar; a segment on which said type bar is mounted, a stationary stop disposed outside the path of movement of said type'bar; a co-operative stop; a train of operati-ve connections whereby said type bar is effective to move said co-operative stop into engagement with said stationary stop,lsaid train including a curved member engageable directly by the type bars and provided with parallel arms, andfa rock shaft to which said cooperative sto is fixed, said rock shaft being connecte to said arms; and a wire stop mounted on said segment in the path of movement of said type bar, said wire sto comprising two spirals' of wire compoun wound and arranged one inside the other.

14. In a typewriting machine, the combination of a platen, a key actuated type bar, a segment on which said type bar is mounted, a stationary stop disposed outside the path of movement of said type bar, a co-operative stop, a curved' universal bar engageable directly by the type bars and provided with parallel arms, a rock shaft to which said cooperative stop is fixed, said rock shaft being connected to said arms; and a wire stopl mounted on said segment in the path of movement of said type bar, said wire stop comprisin two spirals of wire compound wound'an arranged one inside the other.

15. In a typewriting machine, the combination of a platen; a keyv actuated type bar; a segment on which said type bar is mounted; a stationary stop disposed outside the path of movement of said type bar; a cooperative stop; a train of operative connections including a curved universal bar engagable directly bythe type bars, and a roc shaft to which said-co-operative stop is fixed, said rock shaft being connected to wire stop mounted on said se ent inthe path of movement of saidtype 16. n' atypewritng machine, the combination yof a platen; a keynotuated type bar; a stationary stop disposed outside t e path of movement of said type bar; a cooperative stop; a train of operative connections Whereby said type bar is efectiveto move said (zo-operative stop into engagement with said stationary stop, said train moinding a curved member engel eable directly by the type bars and rovi ed with paraliei arms, and a rook sh aft connected te said arms and to which said (zo-operative stop is fixed; andan anvil arranged to intercept said type bar after said stops have engaged.

Signed at llion, in the countyo Herkimer i5 and State of New York, this 17th day of August, A. D. 1922.

GEORGE A. SEIB.

Witnessesz y LINNIE 1F. BURNM'T,

Rev K. FRENCH.

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