US1734518A - Banking stop for typewriters - Google Patents

Description

Nov. 5, 1929.

F. P. GORIN BANKING STOP FOR TYPEWRITERS Filed Feb. l, 1926 5 Sheets-Sheet NEWW Nov. 5, 192.9. P. GGRIN BANKING STOP FOR TYPEWRITEHS Filed Feb. l, 1926 5 Sheets-Sheet NOV. .5, 192.9s F. p GORlN BANKING STOP FOR TYPEWRITERS Filed Feb. l, 1926 5 Sheets-Sheet atto 11 Patented Nov. 5, 1929 FREDERICK I?. GDRIN, OF SEATTLE, WASHINGTON BANKING STOP FOR- .TYPEWRITB-S Application filed February This invention relates to improvements in carriage stops for typewriting machines and particularly to such stops as are employed to arrest the carriage when it is returned to its initial writing point to begin a new line. The principal object of the invention is to provide a device of this character which takes complete control of the carriage Whenever the carriage reaches the pre-determined writw ing point and which maintains such control only until the carriage comes to rest at that' point. In many of the former patents issued to me, for example Patent Number 1,544,147 issued to me upon the 30th day of June, 1925, I described and claimed a stop mechanism which can only take control of the carriage after it has passed the predetermined writing point.

l/Vhile the constructions shown in my said ze former patents are operative, yet the fact that the control of the carriage can only occur due to its movement past the printino' point, renciers such control less positive t `an if complete control occurred immediately when the carriage reached thc writing point regardless of whether the carriage passed that point or not. ln all my former constructions the lockingoi the carriage to the frame stop began after the carriage stop and the trame stop had collided with each other,therefore as the carriage passed onward past the writing point against the action of the carriage buffer spring, the control of the carriage by the stop mechanism became more and more complete,

on the other hand when the carria e returned under the rellen action of the uler spring the control grew correspondingly less and less so that when the carriage had been fully returned to the writing point the tarl ringe control ceased entirely rendering it necl essary to depend upon the inertia of the carm ringe at that time to carry it against some pro" jection rigid with the typewriter frame, so as prevent the carriage from rebounding one or more letter spaces to the right of the printn ing point, as viewed from the front of the typewriting machine. lin my present con struction the carriage stop is under the com plete control of the framestop the instant the 'carriage reaches the'wvtiting pointand no l, 1926. Serial No. 85,292.

movement of the carriagebeyond that point is necessary to complete such control. As the carriage proceeds against the action of the buffer spring this complete control continues until the carriage is iully returned to the 55 writing point by the reflex action of the butler spring and since the carriage was fully locked when it iirst reached that point, it follows that it must be locked when it returns to that point, so that there is no uncertainty involved due to any dependence upon varying degrees of momentum, etc., as is the case in my former patents; In my present construction I provide automatic means for completely relieving the carriage from the control of the frame stop only when the usual typewriter feed be fully returned to normal position at the writing point and not otherwise, In other words the action of the parts which releases the carriage from the frame stop is synchronized with the return of the feed rack to its feed pinion so that both operations are completed at the same time, which avoids all possibility of incorrect positioning of the carriage regardless of any manual assistance' that the operator might otherwise be called upon to give, as for instance by prolonging the pressure upon the usual tabulator key so as to give the carn riage time to settle at the writing point after has been vibrated by the carriage louffer spring,V lt is not new in the art to provide a frame stop which is moved into position to collide with the carriage stop due to the operation of a tabuiator lrey, together with means which places the carriage under control of the frame stop so long as the operator continues pressure upon the tabulator key, but in such constructions the control of the carriage ceases whenever' the operator releases pressure upon the tabulator key which may occur simultaneously with the impact of the stops, with a resultant rebound of the carriage. This deficiency renders the correct positioning of the carriage very uncertain because such positioning is entirely dependent upon the skill of the operator and the nicety of his manual assistance. Such constructions are not therefore fully automatic. When a carriage bulier be employed, the defect just explained becomesso-aggravated as to render 100 the entire stop device practically useless because the operator can never be certain how long to wait after the impact, before he re leases pressure upon the tabulator key. In my presentconstruction there is no necessity for continued pressure upon the tabulator key after the 'carriage reaches the writing point, or for any other manual assistance ofthe carriage after that time. An important feature of this invention is that a chute is embraced within which the carriage stop must descend while the typewriter feed rack is descending into connection with its pinion.

In the drawings: Fig. 1 is a. plan View of the well-known Remington typewri'ting machine with my devicev applied thereto.

Fig. 2 is a rear elevation of the same.

Fig. 3 is a transversesection, `partly in elevation, through the frame and carriage.

Fig. 4 is a side elevation showing the releasing mechanism.

Fig. 5 is a fragmentary detailed view of the device showing a part of the releasing mechanism.

Fig. 6 is a top plan viewof the stop device proper.

Fig. 7 is a transverse sectional view of the same taken immediately at one side of the screw for uniting the stop member and iston.

Figs. 8 to 13 both inclusive are fragmentary detailed views'of the stop device as viewed from the front of the typewriting machine, and showing the successive positions of the carriage stop during the different stages of its operative engagement with the frame stop.

Fig. 14 is ay fragmentary detailed view showing the relation between the carriage stop and the feed rack connections.

Fig. 15 is a similar view showing the position of the feed rack just as the carriage has been liberated from the control of the stop device. v

Fig. 16 is a plan view of the'piston.

Fig. 17 is a plan View of lthe stop member.

Fig. 18 is a side elevation of the same.

Referring now more particularly to the drawings, reference numeral 1 indicates the typewriter carriage, 2 the frame structure generally, on which typewriter carriage 1 is pivotally supported an extension 5 carrying the usual letter feed rack 6 arranged to engage the usual pinion 7. The carriage is operated in letterfeed direction by the usual tape 8 attached at one end as at 9 to the carriage, and connected at its opposite end to the usual spring drum 10. The ordinary stop bar 11 is notched at 12 to adjustably receive A the ordinary stops 13. 14 indicates the ordinary tabulator plunger which co-acts with.

the'stops 13 to arrest the carriage during a tabulating operation. 15 indicates the usual brackets secured to the carriage by the screws i shoulders 36 and 36a.

16 and to which is secured the stop bar 11. 17 is an upstanding bracket rigid with the carriage 1 (see Fig. 4) and upon which is pivoted, at 18, an arm 18, one of whose ends projects beneath the usual projection 19 upon the usual hand lever 20. The opposite end of the arm projects beneath the feed rack G in the usual manner so that when the lever 2O be operated to return the carriage in contra-letterfeed direction, the inner end of the arm will be depressed and its opposite end elevated, which causes the feed rack to rise out of engagement with its pinion 7. 21 is an arm rigidl secured to the feed rack at 22, the free endy of the arm is enlarged, as shown (Figs. 2 and 3) and is perforated at 23. 24 isanother arm pivoted at 25 upon a bracket 26, which is rigidly secured at 27 to one of the brackets 15. The arm 24 projects through the opening 23 of the enlarged portion of the arm 21 so that both the arms move together at all times so that the movement of the arm 24 is at all times completely controlled by the `movement of the feed rack. 28 is a casting bored through as at 29. Screws 30 secure the casting to the typewriter frame. Slidable within the bore 29 is a piston 31, one of whose ends is bored out as at 32. Threaded bushings 33 close the ends of the bore 29 and between one of the bushings and one end of the piston is a spring 34. The casting 28 is cut away as at 35, leaving the edges or shoulders 36 and 36a which form limit stops for the movement of the piston member being rigidly secured to the piston by a screw 38. vfThe stop member is bifurcated so as to form legs 39 and 40, which extend upwardly above the circularA surface of the pis ton 31 so that as the piston is moved back and forth those arms will coact with the 41 is a floor which connects the' legs 39 and 407 the oor being cut-away as at 42. 43 is a ledge having an upper slanting face as shown (see Figs. 6 and 7) and upon which the floor 41 slides. The ledge 43 is cut-away as at 431 (see Fig. 11) so that when the parts are in normal position as shown in Fig. 6,"the cut-away Vportion 43a of the ledge 43 is in register with the cut-away portion 42 ofthe floor 41 which allows the free end of the arm 24 to pass through both the cutaway portions and thus entirely free itself, as shown in Fig.` 13. 45 indicates an eXtreme marginal stop which extends'downwardly from the ledge 43 (see Figs. 7 to 13). 44 indicates the usual hand levers (Fig. 1) whose outer ends project beneath the feed rack 6 so that the latter may be raised out of contact with its feed pinion and allow the carriage to be moved in either direction, in the usual manner.

I prefer tohingedly mount the casting 28 upon the typewriter frame instead of rigidly mounting it by means of the screws 30, so

that the operator may manipulate the usual hand lever 44 Whilev the carrlage is in such lposition as will cause the end of the arm 24 to project beneath the ledge 43 (see F ig. 13).

vIf the casting 28 .were rigid with the frame the hand levers 44 could not always be operated because the ledge would prevent any upward movement of the arm 24. I have indicated the hinges in dotted lines at 28el in Fig. 3, 281 indicating the hinge pin which is rigid with the typewriter frame and which loosely passes through the hinges or bosses 28a.

lWhenever the carriage is moved in contra.- letterfeed direction by means of the usual operating lever 20, the lever will rotate in its bearings together with its projection 19, all in the usual manner. This movement of course depresses the inner end of the lever 18 (Figs. 4 and 5) and causes its opposite end to rise, carrying with it'the feed rack, so that before the carriage startsto move the feed rack is free of its pinion .7, thus causing a substantially noiseless return movement of the carriage to begin a new line, and at the same time relieving the feed mechanism of useless wear and depreciation. This arrangement is not new in the art, it having been employed in the early history of the art, but unless means be provided to prevent it, the reconnection of the feed rack with its pinion when the carriage reaches its banking or initial limit stop, is uncertain. Thisv is so because the carriage rebounds away from its banking stop and "causes the feed rack to fall into reengagement lwith its pinion at a point other than the predetermined writing point for the beginning of a new line. Therefore, the custom of disconnecting the feed mechanism whenever the carriage be returned to, begin a new line has long since been abandoned inthe art. Even if the feed rack be allowed to remain in' engagement with its pinion during such return of the carriage, the rack meanwhile freely riding over its pinion teeth, the carriage often rebounds away from its banking stop especially if the carriage be thrown back violently in rapid'writing. Due to this fact means are provided by leading typewriter manufacturers such as the manufacturers of the well-known Remington, Underwood and others, to prevent this, notwithstandingl the feed rack and its pinion are left in engagement with each other during the return of the carriage to its banking stop, and as stated varying forms of sa ety means are in use in the leading typewriting machines. The safety devicesjust referred to operate more or less effectively of course, but the undue wear upon the feeding mechanism is in no Wise relieved to say nothing of the, terrific rackin or jarring of the entire typewriting mae ne, due to the repeated heavy impacts of the carriage against its banking stop whenever it is returned to begin a new line of writing. In my present invention I retain all the advantages and benefits accruing from the free return of the carriage to its banking stop, with the feed mechanism disconnected; effectively cushion the impact of the carriage against its banking stop and in addition provide positive means for. insuring the reconnection of the feed rack with its pinion at exactly the pre-determined Writing point, with the net result that the entire operation is substantially noiseless in all respects and the life-of the entire typewriting machine greatly prolonged.

F ig. 8 shows the positions of the parts before the operator has manipulated the operating lever 20, the feeding mechanism being in engagement as seen in Fig. 2. Fig. 9 shows the position of the arm 24, in dotted lines, after the operating lever 20 has been manipulated, which of course elevated the arm through the projection 19, lever 18, feed rack 6 and the arm 21. A continued movement of the carriager in contra-letterfeed direction causes the arm 24 to reach its position as shown in full lines in Fig. 9, so that it is free to ride over the leg 39 of the stop member 37, until the arm 24 contacts with the leg 40 and the floor 41, as shown in Fig. 10. `When this contact occurred the stop member 37 with kits attached piston 31 was carried along with the arm 24, against/,the action of the spring 34 and the impounded air within the bore 32, as shown in Fig. 11. The carriage motor spring k10 then asserted itself and drew the carriage back in letterfeed direction which caused the arm 24 to fall through the cutaway ortion 42 in the Hoor 41 of the stop memer. The arm was thus brought into contact with the ledge 43 as seen in dotted lines in Fig. 11. As the carriage continued to move in letterfeeddirection the stop'member 37 was of course caused to move with it because the leg 39 of thestop memberwas in the path of the arm 24. The described movement continues until the leg 39 contacts with the limit sto 36 at which time the cutaway portion 42 1s in alignment with the cutaway portion 43 The operator released his hold upon the lever 30 when the parts were in their positions as shown in Fig. 10. Therefore, the arm 24 now falls through the cutaway portions 42 and 43a as seen in Fig. 12 and finally assumes its position of rest as seen in dotted lines in Fig. 13. As the type keys are new operated the carriage responds in the usual manner because the' arm 24 is now free to ass along beneath the ledge 43. If the usual liand levers 44 be operated while the parts are in their positions as shown in *F ig. 13, the casting 28 offers no appreciable resistance because the casting will swing upward- 1y about itshinge pin 28". When the arm 24 is in its position as 'seen in Fig. 13 the carriage is also vfree to be moved in contraletterfeed direction until the arm 24 contact's with the marginal stop 45, to permit the writing of marginal matter. I prefer to provide a pawl 46 which is pivoted upon the ledge 43 so that in case the carriage, for any reason, should move in response to the manipulation of the operating lever 20 beforethe feed ra'ck could rise out of engagement with its pinion, thearm would nevertheless not pass under the ledge 43 butover'it as alreadyvdescribed.

It is apparent that 'thed'evice may be employed as desired for columnating or tabulat! ing urposes in which case the beginning of the ine in the first column'would be 'determined by the marginal stop 45, and the beginning of the lines in thesecond column would be determined by the shoulder 36. The tabulating operation would involve, first, the positioning ofthe carriage by means of the cushioning action already described, which would set the carriage at say 15 pas indicated upon the usual scale. 'After the matter had been written in that column the arm 24 would have reached approximately its position as seen in Fig. 13, according to the length of the word or words written, and then all that would be necessary to correctly position the carriage for the outer column of tabulation would be a movement of the carriage back in contra-letterfeed direction until the arm 24 contacted with the stop 45 and the matter written in that column with about the following results:

James Smith John Doe Richard Roe R. Sims E. Ault James Thompson In such tabulation it is obvious that the operator need have no regard whatever for the usual scale because the carriage would position itself accurately at the pre-determined writing points represented by the stops 45 and and 36 respectively.l In other words, the same tabulating results can be acccomplished by by my present invention as are accomplished in my saidPatent Number 1,544,147.

' It is plain that the positioning of the carriage, either in turn movement of the carriage to begin a new line, is certain, without any undue attention or care of the operator, because the falling of the arm 24 from its position as seen in Fig.

12 occurs simultaneously with the falling of the teeth of the feed rack into the spaces between the teeth of its pinion 7 so that when the arm 24 reaches its'dotted position as seen in Fig. 13, the. feed rack has entirely completed its downward movement and has reconnected with its pinion at exactly the predetermined writing point. There is littleA tendency for the arm 24 to rebound to the right of its position as seen in Fig. 12 because in its passage from Iits position as seen tabulation or in the usual rein Fig, 11 to its position as seen inv Fig. 12 the movement'was cushioned by reason oy Vthe air impounded between the bushing 33 and the end of "the piston '31, the air escaping rather slowly during the movement, between the piston and bore within which it slides. Even if this were not the case however, there could -be'no rebound because theright hand wall of the cutaway portion 43a'of the ledge 43 (Fig. 13) would prevent'it and force the armtravel downwardly' in a straightpath until thefeed rack came to rest with respect to its feed pinion. The carriage reached the" writing point exactly at the time that the 4arm 24y reached its position as seen in dotted lines in Fig. 10 and at exactly that time the carriage came under complete control of the stop mechanism and this condition continued until this control was broken and shifted completely to the letterfeed mechanism. In other words, as the carriage began to free itself from the stop mechanism the teeth of the feed rack .began to enter the spaces between the teeth of the feed pinion, and the instant the control of the stop mechanism was broken the complete control of the letterfeed mechanism was established. Claims:

-1. ,The combination with a t ewriting machine having a motor controlle carriage feeding mechanism, means, includingmeans which takes complete control of the carriage movement at the initial writing point and continues said control only until the carriage comes to normal rest at said writing point.

2. The combinatlon with a typewriting machine having a motor controlled letter feeding mechanism, of carriage arresting means, including means which takes complete control of the carriage movement at the initial writing point, and means which auto matically return such control to the letter feeding mechanism at the initial writing point without further manipulation. Y

3. The combination with a typewriting machine of carriage arresting means, said means including'a cushion to relieve the shock of such arrest, means which takes complete control of the carriage movement at the initial writing point, and means which maintains such control independently of any manual assistance.

4. The combination with a typewriting machine having a motor controlled carriage feeding mechanism, of arresting means including means which takes complete control of the carriage movement at the initial writing point, and means which automatically returns such control to the carriage feeding mechanism at vthat point without furtherof carriage arrestingmamie resilient carriage arresting means which takes complete control of the carriage movement at the initial writing point, means for maintaining such control during the vibration of the carriage incident to the arresting thereof, said means finally returning said con trol to the letter feeding mechanism at said writing point without further manipulation of the parts.

6. The combination with a typewriting machine having carriage feeding mechanism of carriage arresting means which permits the carriage to pass beyond and return to the initial writing point, including means which meanwhile maintains complete control of the carriage during its said movement, and means which then shifts said control to the carriage feeding mechanism at the initial writing point. i

7 rEhe combination with a typewriting machine having carriage feeding mechanism, of carriage arresting means including a cushion which allows the carriage to pass beyond and return to its banking position, and means which takes complete cont-rol of the carriage movement when -the carriage iirst reaches its banking position and continues such control only until the carriage comes to normal rest at such banking position.

8. In an attachment for typewriting machines, the combination of carriage arresting means, means for attaching the same t the typewriting machine, a cushion to absorb the shock of such arrest, said arresting means including means which takes complete control of the carriage movement at the initial writingpoint independently of any manual assistance, and means for automatically shifting such control to the typewriter letterfeed mechanism at that point.

9. The combination with a typewriting machine of carriage arresting means, including means which'takes complete control of the carriage movement at the initial writing point and means controlled by the letterfeeding mechanism for shifting the .control of the carriage from said arresting means to the letterfeeding mechanism at the writing point without further manipulation.

' 10. The combination with a typewriting machine, having a motor controlled letter feeding mechanism, and means for disconnecting the letterfeeding mechanism, of carriage locating means which includes a/'cushion 'on which the carriage acts upon reaching the writing point and which is effective to return the carnage to that point, and means which takes complete control of the carriage movement at the initial Writing point and delivers the same to the typewriter letterfeeding mechanism at that point.

11. In combination with a typewritmg machine having a motor controlled letter feeding mechanism, of means for disconnect- 05 ing the letterfeeding mechanism of the typewriting, and carriage arresting means which includes a cushion to relieve the shock of such arrest, means which takes control of the carriage movement during the entire action of said cushion, means for maintaining such control until after the letterfeeding mechanism has been fully reconnectedat the writing point.

l2. The combination with a typewriting machine having letterfeeding mechanism of means for disconnecting the typewriter letterfeeding mechanism whenever the carriage I is operated to' return it towards its initial writ-ing point, and a banking stop Which takes complete control of the carriage movement following disconnection of the letterfeeding mechanism, said stop maintaining control of the carriage movement until the letter-feeding mechanism is again connected.

13. The combination with a typewriting machine having letterfeeding mechanism of means for disconnecting the typewriter letterfeeding mechanism whenever the carriage is operated to return it towards its initial writing point, and a banking stop which takes complete control of the carriage movement adjacent the initial writing point of the carriage while the letterfeeding mechanism is disconnected, said means releasing such control aftcr the letterfeeding mechanism has been restored to normal.

14. The combination withv a typewriting machine having letterfeeding mechanism of means for disconnecting the typewriter letterfeed mechanism whenever the carriage is operated to return it towards its initial Writing point, and a banking stop which takes control of the carriage movement adjacent the initial Writing point, a cushion to relieve the shock incident to the arrest of the carriage by the banking stop, and means for maintaining the control ofthe carriage movement by the banking stop until the letterfeeding mechanism has been restored to normal 15. The combinationwith a typewriting machine of step by step feeding mechanism and motor mechanism for the carriage, means for arresting the carriage at the initial writing point, means which takes complete control of the carriage movement at that point, and means for shifting such control to the letterfeeding mechanism without further manipulation. l

16. The combination with a typewriting machine of step by step feeding mechanism and motor mechanism for the carriage, means for arresting the carriageat the initial writing point, a cushion for absorbing the shock of such arrest, means which takes complete control of the carriage movement at that point, and means for shifting such control to the letterfeeding mechanism without further manipulation.

17. The combination with a typewriter having letter feeding mechanism, of means forl completely separating the letter feeding mechanism during the return of the carriage to the initial Writing point, and means arranged adjacent the initial writing point for independently governing the carriage movement to finally arrest such movement at the initial Writing point, said means serving to prevent interconnection of the letter feeding means of the `carriage until said4 governing means has completely functioned.

18. The combination .with a typewriting machine having letter feeding mechanism, of means for completely disconnecting the letter feeding mechanism during movement of the carriage toward the initial writing point, a carriage movement control element arranged adjacent the initial writing point, and

means operated in the disconnection of the letter feeding mechanism to cooperate with said control element for the complete government of the carriage movementat the initial writing point.

19. In a typewriting machine having letter feeding mechanism, means to compel a complete separation of the letter feeding mechanism during 4movement of the carriage toward the initial Writing point, a carriage movement control mechanism arranged adjacent the initial writing point, and a member movable within the plane ofsaid control mechanism to cooperate with said control mechanism to maintain independent control-of the carriage movement adjacent said writing point, said member serving to prevent interconnection of the letter feeding.

mechanism during th'e cooperation of said member and the control mechanism.

20. In a typewriting machine having letter feeding mechanism, meansto compel a complete se aration of the letter feeding mechanism uring movement of the carriage toward the-initial Writing point, a carriage movement control mechanism arranged adjacent the initial Writing point, and a member positioned in the separation of the letter feeding mechanism to cooperate with said control mechanism to maintain independent control of the carriage movement adjacent said writing point, said member serving to prevent interconnection of the letter feeding mechanism during the cooperation of said member and the controll mechanism, said c011- trol mechanism releasing said member to permit interconnection of the letter feeding mechanism following the function of said control mechanism.

In testimony whereof I aiiix my signature.

FREDERICK P. GORIN.

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