US1615694A - Typewriting machine - Google Patents

Description

Jan. 25, 1927. 615,694

G. G. GOING TYPEWRITING MACHINE 1 Filed April 1 1924 2 Sheets-Sheet 1 l NVENT OR [M I ATIZORNEY Jan. 25,, 1927. 1,615,694

(3. G. some TYPEWRITING MACHINE Filed April 16. 1924 j 2 Sheets-Sheet 2 INVENTO ATTORNEY ill Patented Jan. 25, 1927.

UNITED STATES PATENT oFFI-CE.

GEORGE GOULD GOING, 0F MIDDLETOWN, CONNECTICUT, ASSIGNOR TO REMINGTON- NOISELESS TYPEWRITER CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

. TYPEWRITING IvIACHINE.

' Application filed April 16, 1924. Serial No. 706,845.

This invention relates to typewriting machines, and more particularly to front strike machines in which pivoted type bars are employed.

The object of this invention generally stated is to provide an improved construction for type bars and their actuating connections which is functionally andstruc-- and in which improved means are provided for causing the type bars to effect pressure imprints after having been arrested by said stop, whereby the printingoperation 1s accomplished substantially without noise.

Other objects of the invention will hereinafter more clearly appear.

The invention accordingly comprises the features of construction, combinations of elements, and arrangements of parts, which will be exemplified in the construction hereinafter described and particularly pointed out in the appended claims.

Fora fuller understanding of the nature and objects of the invention reference should be had to the following detailed descrip-' tion taken in connection with the accompanying drawings in which:

Figure 1 is a fragn'ientary side elevation of one of the type actions and some of the associated parts, the full lines representing. the parts as they appear in normal position; and

Figure 2 is a view similer to Fig. 1 but showing the type action in printing position in full lines.

Referring now to the drawing, 10 denotes the frame of the typewriting machine having a series of key levers 11 pivoted at 12 to the rear portion of the frame. Each key lever is adapted to actuate the sub-lever 13, which is pivoted at 14 and is directly con nected to actuate the associate type bar shown generally at 15. Each type bar 15 is pivoted in any suitable or well known manner at 16 and when in retracted position is adapted to rest upon the padded support or rest 17. When moved from the retracted to the printing position shown clearly in Fig. 2,; each type bar at some intermediate polnt 1s adapted to bring into action the means shown generallyat M, which finally operatesto produce pressure printing. The

point in the printing movement of each type bar Where it first coacts with the means M is indicated in dotted lines in Fig. 1. Just after the bringing into action of the pressure printing means M. the type bar swings into contact with the contact face of an ,absorbing cushion 19 carried by a fixed stop 18 interposedin the paths of all of the type bars. -This stop is so proportioned and positioned that each type bar under the action of its key is brought to a substantially complete stop in advance of contact with the printing surface of the platen shown at 20; thereby preventing a hammer blow or impact against the platen. The clearance between the type bar and the platen when the Y former substantially attains this position of rest is in the neighborhood of one one-, hundredth of an inch, or so. i

In order to bring the means M into action, the type bar is provided at its free end with a projection 21 which extends beyond the type head 22 and is adapted to come into contact with a centrally disposed antifriction roller 23. This roller iscarried on one arm of the bell crank lever 24, the latter being pivoted at 25 to some convenient fixed part of the frame of the machine. The bell crank. lever 24 is so proportioned and positioned that the anti-friction roller 23 projects into the path of swing of the projection 21 on eaclrtype bar at a point just prior to the contact ot'a type bar with the cushion 19 of the stop 18. The bell crank lever has itsother arm pivotally connected to the rearendtthat is, the end adjacent the platen) of the thrust bar 26. The front. end of this thrust bar is pivotally connected at 27 with an arm 28, which is pivoted at 29 and has a Weighted member 30 projecting upwardly therefrom. The arm 28, as indicated, is pivotally secured to a rigidly held support on the frame of the machine. It is preferable that the support for this arm should be adjustable fore-and-aft of the machine since the efficient operation of this type action depends upon the precise location of the point at which contact by the type bar 15 takes place with the antifriction roll 23. To provide for this adjustment, headed binding screws 30 have 'turn movement to normal threaded stems which pass freely through elongated openings in the foot-piece. of a bracket or hanger 31, to which the arm 28 is pivoted; the threaded ends of the screws engaging in tapped openings in the machine frame. By tightening the screws 30 the bracket 31 is firmly held in its adjusted position.

The single means M co-operates with each type-bar in the system and is therefore common to them all. It-is shown in the retracted position in Fig. 1. In order, however, that the parts shall always be brought back to this position after each printing operation, a contractile spring 32 is shown contoected to the front arm of the bell crank lever 24 and to the rearend of the thrust bar 26. This spring is normally under tension, so as to draw these parts together. A padded fixed stop 33, however, is provided on the hanger 31 to prevent the pivoted arm 28 from swinging too far toward the front and thereby regulate the normal position of the roller 23 in the path of the projections 21 on the type bars.

'In order to aid in returning the parts of each type action to normal position an expansion spring 35 is inserted under each key ever 11 adjacent its rear end, and between said lever and a fixed part 36 of the frame of,

the machine. A fixed padded stop 37 is also provided to limit each key lever in its reosition.

it will e seen that the 38 of each type bar 15 is In the drawing, lever arm or heel provided with a slot 39 inwhich the pin 40 at the upper end of the associated sub-lever engages in order to actuate the type bar.

It will be also understood that while but one type action is shown this is done in the interest of clearness. Such disclosure accordingly should be taken as indicative of the plurality ofsuch instrumentalities-which 'would be used substantially always in constructions embodying this invention. In the side actions the upright arms of the sublevers 13 may be inclined inwardly to compensate for the difference in width between the system of key levers and the system of type bars.

The operation of the construction described is as follows:

lVhen a key leverll is depressed from the position shown in full lines in Fig. 1 to the full line. positionshown in Fig. 2 by the operator, this movement causes the upper end of the associated sub-lever 13 to move forw ardly, imparting. a downward pull to the heel 38 of the companion type bar 15. This type bar-in consequence swings through an arc toward printing position, which is shown I in full lines in Fig.2. When the type bar reaches the intermediate position shown in broken lines in Fig. 1, the projection 21 con tacts with theanti-friction roller 23. Considerable momentum at once passes from the swinging type bar and is transmitted to the bell crank lever 24, which in turn applies amits the pull on to the arm 28 to swing it to-.

gether with the weighted member 30 from its reclining position toward the platen. The type bar 15, however, still swings further and approaches the platen while continuously applying momentum through the anti-friction roller 23 to the bell crank lever 24 until it comes into contact with the padded stop 18. The momentum thus communicated to the member 30 causes it to con tinue its arcuate movement toward the platen, the anti-friction roller on the bell crank lever now moving rearwardly at an accelerated rate out of contact with the projection 21 on. the type bar. This movement continues until the rear end of the thrust bar is brought into contact with the front face of the projection 21 on the type bar 15.

The thrust bar 26 and the arm 28 comprise a toggle linkage adapted to apply force to the upper end of the type bar at a time when the type bar is in contact with the arresting pad 19 and when the printing face of the effective type is very close to the printing surface of the platen, as pointed out above. The energy in the member 30, however, is not finally spent until the toggle linkage is completely straightened, as shown in Fig. 2. In this straightened position, the toggle quickly applies a final thrust to the adjacent face of the projection 21 on the type bar 15, pressing the type bar against the-resistance of the pad'lS) and in overcoming such resistance presses the effective type face quickly against .the surface of the platen, or the paper thereon. A stop at 41 is provided on the arm 28 to coact with the bar 26 and prevent the toggle linkage from swinging through its straight line positioh,

shown in full lines in Fig. 1. Substantially at the same instant that the means at M are thus withdrawn from the type bar, the latter begins to swing back to normal position partly under the influence of its own weight and the reaction of the pad 19 and partly under the influence of the associated spring tion with the type bar for effecting pressure printing and that astop is employed which is fixed in the path of movement of each type bar to prevent the type bar. from swinging under its own momentum intocontact with the printing surface of the platen. Such commonmeans is, by this inv-cntion, designed to accomplish pressure printing and is arranged to receive m0- mentum from the type bar for a brief period at a point just a little before the instant when the type bar contacts with the stop.

At this instant, the type bar is moving'with substantially and a maximum velocity,

' therefore imparts considerable momentum to the parts of the pressure printing means.

The pressure printing means thus acquires suificient energy to complete the printing operation after the type vbar has come substantially to a position of rest against the fixed stop. Using a toggle linkage as the pressure printing instrumentality insures finally a quick and powerful. application of the energy transmitted thereto in 'effecting an imprint under the influence of stored energy.

Changes may struction without departing from the invention as it, is defined in the accompanying clalms.

Having described my invention, what I claim as new and 'desire to secure by Let ters Patent, is:

- 1. In a typewriting machine having a platen, the combination with a type action comprising a key lever, a type bar and actuating connections therebetween, of a stop fixed in the. path of the type bar and arranged substantially to arrest the type bar at a relatively short distance from said platen, and means disconnected from but operable by the type bar to apply a printing pressure as distinguished from a blow to the type bar after it comes in contact with said stop and thereby overcome the resistance of said stop and effect a pressure imprint. Q

2. In a typewriting machine having a platen, the combination with a type action comprising a key lever, a type bar and actuating connections therebetween, of a stop arranged substantially to arrest the type bar at a relatively short distan e from said laten, and means operable by the type bar lint independent of direct connections there. with to apply'a printing pressure to the type bar as it comes in contact with said stop 'whereby to effect printing, said stop being be made in the above con-- fixed in position below and in advance of the platen to intercept the type bar in its line of travel.

3. In a typewriting machine having a platen, the combination with a type action comprising a key lever, a type bar and actuating connections therebetween, of a fixed stop arranged substantially to arrest the type bar at a relatively short distance from said platen, and means having a part thereof normally arranged in the path of the type bar, to be struck thereby at the last portion of its printing stroke and cause such means to apply a printing pressure to the type bar 1 as it comes in contact with said stop whereby to effect a pressure imprint, said pressure applying means receiving its operating energy from the momentum of the type bar. 4. In a typewritingmachine having a platen, the combination with a type action comprising a key lever, a type bar and actuating connections therebetween, of a stop fixed in the path of the type bar and arranged substantially to arrest the type bar at a relatively short distance from said platen and means disconnected from said type action and stop but normally arranged in the path of the type bar-and operable thereby to apply a printing pressure to the type bar after it comes in contact with said stop whereby to effect the printing operation by pressure, said means being arranged to receive its operating energy from the momentum of the type bar when it coacts therewith and disposed to apply the printing pressure along lines substantially parallel to the movement ofthe type bar during the printing operation.

5.'In a typewriting machine having a platen, the combination with a type action comprising a key lever, a type bar'and actuating connections therebetween, of a fixed padded stop arranged substantially to arrest the type bar at a relatively short distance from said platen, and means separate and distinct from said type action but normally arranged in the path of the type bar and operable thereby to apply a printing pressure to the type bar after it comes in contact with said stop whereby to effect 'a.

pressure imprint, said means being normally arranged inthe' path of said type bar to be struckthereby and receive its operatingenergy from the momentum of the type bar and provided with means to return it to its normal inac ive position after the printing.

6. In a ty pewriting machine having a platen, the combination with a type action comprising'a key lever, a type bar and actuating connections therebetween, of a stop. arranged substantially to arrestthe type bar at a relatively short distance from said platen, and means operable by the type bar to apply a printing pressure to the type bar as it comes in contact with saidstop wherelip by to effect printing, said means comprising a thrust bar for transmitting pressure to the type bar, and thrust bar supporting means adapted to support the thrust bar out of the path of the type bar and to move it into engagement with the type bar when said means operates.

T. In a typewriting machine having a i platen, the combination with a type action 1 comprising a key lever, a type bar and actuating' connections therebetween, of a stop arranged substantially to arrest the type bar at a relatively short distance from said platen, and pressure applying means operable by the type bar to apply a printing :pressure to the type bar as it comes in con' tact with said stop whereby to effect printto the type bar, and thrust bar supporting means adapted to support the thrust bar out of the path of the type bar and to move it into engagement with the type'barwhen said means operates, said thrust bar supporting means being provided with an energy receiving member disposed in the path of the type bar whereby said meansis set win motion upon the operation of a type bar.

-8 In a typewriting'machine having a platen, the combination with a type action comprising a key lever, a type bar and'actuating connections therebetween, of a stop arranged substantially to arrest the type bar at a relatively short distancefrom said platen, and'means independent of the type action and operable by the type bar to apply a printing pressure to the typebar as it comes 1n contact with said stop whereby to eliec't printing, said pressure applying means comprising a thrust bar for transmitting pressure to the type bar, and thrust bar supporting means adapted to support the thrust bar out of the path ofothe type bar .and to move it into. engagement with the type bar when the pressure applying means operates said thrust bar supporting means being provided with an energy receiving member disposed in the path of the type .bar whereby the pressure applying means is set in motion upon the operation of a type bar,-,. and a weight member disposed in a normally inactive. position 'adapted, to acquire momentum under the action of the type bar when the pressure applying means is set in motion, and t Co-Operate with the thrust bar to applya printing pressure to the type bar.

' platen, the combination with a series of type 9. In a typewriting machine having a actions each comprising a key lever, a type .bar and actuating connections therebetween,

of a stop'fixed in the path of all of said type bars and arranged substantially to arrest the same at a relatively short distance.

from said platen, and a single means disng, said pressure applying means comprismg a thrust bar for transmitting pressureconnected from but common to all of the type bars and normally in the paths thereof to be actuated thereby and receive and store energy from each of said type bars as it swings toward the platen and to expend such energy by applying pressure to said swinging type bar and cause'it to effect 21 pressure imprint after it has come substantially to rest against said stop. In a typewriting machine having plate-n, the combination with a type action comprising a key lever, a type bar and actuating connections therebetween, of a stop disposed in the path of said type bar and arranged, substantially to arrest the same at a relatively short distance from said.

platen, and a toggle linkage separate and distinct'from the type action and pivotally attached to said machine and disposed to engage with the type bar as it, swings toward the platen and to receive energy from said type type bar has come substantially to rest against said stop and thereby cause an implaten, and a toggle linkage separate and distinct from the type action and pivotally attached to a fixed part of said machine and disposed to engage with said type bar at an intermediate point in the movement of the latter toward the platen, said toggle linkage being arranged to absorb energy from said type bar and having a )ortion adapted to apply a thrust thereto w ien type bar has come in contact with said stop.

12. In a type'writing machine having a platen, the combination with a series of type actions comprising a plurality of key levers and'type .bars arran ed to be individually actuated thereby, of astop disposed in-the path of swing of said type barsand ar ranged substantially to arrest them ata relatively short distance from said plat-en, and a common toggle linkage independent -of bar to be applied thereto" when the .i

direct connections with. said type actions pivotally attached to a. fixed part of said machine and disposed to engage with each type bar at an intermediate point in its path of swing and arranged to. apply a thrust to.

the engaged type bar when -in contact with saidstop.v

13. In; a'typewriting machine having a platen, thecombination with a series of type actions comprising a plurality of key levers and pivoted type bars arranged to be individually actuated thereby, of a common toggle linkageseparate and distinct from said type actions and pivotally attached to loo thrust to the engaged type bar an a fixed part of the ma chine and' disposed to'be engaged and actuated by each of said I i type bars at an intermediate point in its swing to printing positionrand a ply. a

a pressure imprint therefrom.

14. In a typewrlting machine having a platen, the combination with a series of type actions. comprising a plurality ofkey levers and type bars arranged to be individually actuated thereby, of a common toggle linkage separate and distinct from said type actions and pivotally attached to a fixed part of said machine and disposed to engage witheach of said type bars at an intermediate point in the movement thereof to printing position, said toggle linkage being arranged to absorb energy from each of said type bars and 'havinga portion adapted to apply a thrust thereto subsequent to the instant of engagement.

15. In a typewriting mac in having a platen, the combination with a eries of type actions comprising a plurality of key levers and type bars arranged to be individually actuated thereby, of a common means sep-' ante and distinct from said type actions and adapted to apply a printing pressure to each of said type bars, s aid means comprising a thrust bar, a pivotal supportlng means therefor, and an antl-friction engaging means rigidly extending from said supporting means into thepath ofswing of-each of .the engaged type said type bars whereby said anti-friction means is engaged by each type bar as it swings to printing position to; actuate the thrust bar and apply a printing pressure to bar.

effect 16. In a typewriting machinehaving a v platen, the combination with a series of type actions comprising a plurality of key levers and type bars having individual actuatingconnections therebetween, of a single means operable by each of said type bars and adapted to apply a printing pressure there to, said means comprising a thrust bar and pivotal supporting means attached to, the frame of the machine, said supporting means being provided with means for engaging i with each of the type bars as it swings to printing cposition and arranged to absorb energy from said engaged type bar and finally to apply a'thrust thereto.

17. Ina typewriting machine having a platen, the combination with aseries of type actions comprisinga plurality of key levers and pivoted type bars having individual actuating connections therebetween, of a coinmon type bar pressing means arranged normally in the path of each type bar to be actuated thereby and apply the force thus 7 to be moved out of the path of said type r bar, and said pressure mechanism having another part that moves up behind the type bar. andlpr'esses the type against the platen after the first mentioned part has been moved out of the path of the type bar.

, In testimony whereof I aflix my signature.

GEORGE GOULD GOING.

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