US1471152A - Typewriting machine - Google Patents

Description

Filed Aug. 11 1919 s Sheets-Sheet 1 INVENTOR 5% BY ATTORNEY Get; 16 ,1923. mmsz G. G. some TYPEWRITING" MACHINE Filed Au 11 1919 a Sheets-Sheet 2 INVENTOR ATTORNEY 0m. 16, 1923. HAJ'MSZ G. G. GOING TYPEWRITING MACHINE Filed Aug. 11 1919 3 Sheets-Sheet 3 INVENTOR A TORNEY enonen G. GOING, OF MIDDLE'IYOWN, CONNECTICUT, ASSIGNORHBY MEsNE ASSIGN- TYPEWRITER COMPANY, me, A CORPORATION OF MENTS, TO THE NOISELESS DELAWARE.

'ITENVT :QFFICE, f

TYPEWRITING MACHINE.

Application filed August 11, 1919. Serial NO. 316,609.

A To all whom it may concern:

Be it known that I, GEORGE GOULD GOING, .a citizen of the United States, residingat Middletown, in the county of Middlesex and I '5 State of Connecticut, have invented certain new and useful Improvements in Type writin Machines, of which the following is a fufi, clear, and exact description, such as will enable others skilled in the art to which '10 it appertains to make-and use the same.

This invention relates to typewriting machines, and is particularly proved type action capable of mechanically and functionally perfected embodiment in a .relatively-small size and light weight writing machine. i

It is an object of the invention to provide a simplified and improved type action in .cluding a key lever and type bar and a train of actions therebetween, operable to effect printing without the objectionable recurrent noises of. staccato impact b the type bars against the backed paper.

It is a further object to provide a mecha- 125 nism of the character mentioned which is capable of embodiment to occupy arelatively small space, and retain the characteristic advantages of each touch and rapid operation, combined with the advantage of sub- 'stantially noiseless printing.

.Another object is to provide a typewriting machine having a type actionof the character indicated which is structurally superior and functionally advantageous.

Rim Other objects and'advanta'ges of the invention will be irr'part noted hereinafter in connection with the following description of the accompanying drawing which illustrates a typical, but'preferred, embodiment of the invention and in whichj i Fig. 1 isoa side view taken through the machine representing the structure and association of operating parts including a key lever and type bar and the improved train of connections therebetween, and r i Fig. 2 is a fragmentary top view of the machine including the type action shown in Fig 1, and Fig. 3 is a diagrammatic representation of the major parts tion in different positions, certain of t e numerals of identification having a prime for intermediate position and a second for final position. v The supporting structure of the typewriter includesa directed to an imof the ty e ac-- base 1 and arear plate Adjacent to the latter there is provided a platen 3 mounted to rotate on and travel longitudinally with a carriage 4. The letter space movement of the carriage may be gov: erned by an" escapement mechanism 5 in a well known'manner.

The type action includes a key lever 6 pivoted at its rear end at 7 and having a depressible. finger k y 8 at its fore end and a type bar 9 pivoted at its lower end on a fulcrum 10 and having type characters 11 at its free end.

The keylever and type bar are connected by an angular 'U-shaped link 12 pivoted to rotate at 13 and having an offset on its lower fore end 14 positioned below for actuation by the lever 61 Link 12 is further connected at 15 with a horizontally disposed link 16, the latter in turn connected at itsrear end by a pivot 17 to the type bar at the end of the latter below the fulcrum 10. As thus far described, it will be apparent that the depression of the key lever 6 rocks link 12 about its axis of motion 13 and thereby pulls forward the link 16 to swing type bar 9 toward platen 3. The-limits of travel of the key lever 6 are set by two cushion stops 18 and 19; stop 18 arresting the elevating of the lever and stop19 arresting its depression. Furthermore, stop 19 is so located as to engage and arrest the key leverat a'time when the attendant movement of. the link 16 has been insufiicientto swing' the type bar tinued movement of the type bar is permitted on account of the lost motion action between the offset 14 of link 12 and its corresponding part of the lever 6. Restoration of the parts to the position .shown in Fig. 1 may be accomplished by' a spring 20 acting below the rear end of lever 6' and by a coll spring 21 connecting link 12 with a vertical oflset arm 22 on or integral with link 16. It will be apparent that spring 21 tends to'draw to-' through its, full, stroke to print, and con-- of the pivoted to the free end of type bar 9, preferably in the rear of the type head 11, and a link 24 is pivotally connected to a rigid element 25 which may constitute a part of the type segment frame. Links 23 and 24 are also pivotally connected to each other adjacent their ends 26 and are of a length to constitute an extended toggle when the type bar is moved to print. There is also. provided a lever 27 pivotally connected at 28 to the type bar and having at its fore end an integral or added weight 29 constituting a momentum accumulator, which acts to store energy during the initial depression of the key lever and expend such energy incontinuing the stroke of the type bar against the platen to efi'ectthe printing. In order both to render the movement of the mo-' mentum accumulator 29 such that the initial storage of energy therein will be without disadvantageous effect upon the touch of the key lever and to effect the dissipation of the stored energy through a power-increasing leverage for transmitting pressure behind the free end of the type bar, lever 27 is pivotally connected at 30 with a link 31, and the upper end of the latter is in turn pivotally connected at 32 to a slightly ofi'set \branch 33 of the link 24.

In operation, the depression of the lever 6 effects a direct swinging movement of the type bar at accelerated speed and particularly on account of the relative proximity of the pivot point 17 and the fulcrum 10, it will be apparent that the touch at the key is rendered light. The swinging movement of the upper part of the type bar will also entail an extension of the toggle links 23 and 24 and consequently a bodily elevation of the link 31 which will thereby effect the rotation of the momentum accumulator 29 about its axis 28 at the same time that the momentum accumulator and its lever 27 are bodily moved on account of its attachment to the type bar. In the embodiment shown in the drawing, the parts are designed so that the free end, that is the type end of the bar 9, is moved at high speed during the period of force transmission thereto'from the key lever, and this connection is maintained to the type bar for the major part of its travel toward the platen. The arresting engagement of the key lever-by stop 19 then immediately transfers the actuating force for the type bar from the key lever to the momentum accumulator 29. The latter thereafter moves at a constant or decelcrating speed and therefore during the perlod of energy expenditure by the Weight 29 the speed of the free end of the type bar is rapidly but smoothly decreased while the effectiveness of force transmission, on account of the approach of the links 23 and 24 to form an extended toggle, rapidly but smoothly increases toward infinity.

Practically considered, this operation results in a quick positioning of the type bar closely adjacent the platen at an accelerated speed and an immediate, but nevertheless not abrupt, diminution and deceleration of the speed of the type bar and its final approach to and movement against the platen 3 slowly but powerfully. Moreover, the movement of the type bar toward the platen on its printing stroke may be substantially limited by the extension of the toggle links 23 and 24, and the latter is preferably connected with the element 25 in turn mounted for relative adjustment through screws 34. The type bar,is thus quickly brought rearward but is moved into contact with the ribbon against the paper at a relatively slow speed and therefore without substantial noise of impact, and the actual printing movement is accomplished under relatively heavy pressure by the continued utilization of energy stored in the weight 29.

The escapement for the mechanism of the carriage 4 may be adjusted for actuation by the type bar 9 during the period of travel of the latter under the force of the weight 29; In the particular embodiment of the invention illustrated the escapement mecha nism may include a lever 35 having its fore end located near and engaged by a shoulder 36 of the type bar. The printing and the escapement actuation may thus both be effected by the supplemental energy stored in the weight 29 and dissipated through the train of connections 31, 24 and 23.

In order, further, to prevent overthrow of the toggle and to arrest silently the final swinging movement of the weight 29, the link 31 has a resilient arm 37 with a stud on its extremity in a position to be silently engaged by the cam edge 38 of the lever 27. By this construction the edge 38 is brought silently into engagement with the stud on cushion arm 37 just prior to the consummation of the printing. Consequently, weight 29 is positively but resiliently arrested and its return movement aided by the rebound of the arm 37.

To arrest the free end of the type bar on its return stroke there is provided a cushion stop 39 held in a suitable part of the type bar segment. The cushion 39 may also if desired be arranged to limit the return movement of an extension 40 of the link 24.

Fig. 2 shows the relative arrangement of the type bar segment to the ribbon spools, to the platen and to the escapement mechanism. As represented, the type segment is arranged in an arc in front of the platen and in substantially the horizontal plane of the latter and the type bars are arranged radially from the printing point and a e mounted 1 being associated with said type bar to exin a bottom comb guide v 'Ihe type segment may be mounted for raising and lowering to difi'erent casepositions on uprights 42. The ,finger keys 8 may be arranged in the conventional manner at the keyboard.

Having described my invention, what I Patent is; k

1. In a typewriting machine, in combination, aplaten, a key lever, a swinging type bar, operating connecting means between claim as'new and desire to secure by'Letters said key lever and type 'bar whereby the formcr actiiates the latter, anda motion governing means kinematically linked to the type bar independently of said connecting means, including an independent energy storing member, and arranged to control the entire swing of the type bar toward the platen, storing energy during the initial movement and expending the same during the completion of the printing stroke.

2. In a typewriting machine, in combination, a platen to back'the paper,a de

. pressible key lever, a type bar, operative con-- necting means between said key lever and L saidtype bar to start the latter toward the platen on the depression of the former, a

' stop to arrest depression of said key lever prior to the final movement of said type bar, said connecting means including a lost motion device to permit continued 'movement of said type bar after arrest of said key lever, and means independent of said connecting means to store energy durlng the 1nterval of movement of said type bar by said key lever, said last mentioned means being associated with said type bar to expend its stored energy in eiiectinv the final printing movement of said type ar.

3. In a typewriting machine, in combination, a platen to backthe paper, a depressible key lever, a type bar, operative con'- necting means between said; key lever and (iii said type bar to start the latter toward the platen on the depression of the former, a stop to arrest depression of said key lever prior to the final movement of said type bar, said connecting means including a lost motion device to permit continued movement of said type bar after arrest of said key lever, and means independent of said connecting means to'store energy during the interval of movement of said-type bar by said key lever, said last mentioned means pend its stored energy in effecting the final printing movement of said type bar through a speed reducing and power increasing connection. 1

4. In a typewriting machine, in combination, a platen, a pivoted type bar, a key lever, a direct connection between said key lever and said type bar to start movement of the latter upon depression of the former,

means to store energy during the movement of said'type bar, bysaid key lever and expend energy thereafter to complete the printing stroke of said type bar, and means to limit the printing stroke of said type bar substantially independently of Said platen, said energy storing means being associated with said type bar limiting means to expend its energy therethr'ough during I the final travel of said type bar.

5. In a' typewriting machine, in combination, a platen, a pivoted type bar having its free end normally spaced from the platen and capable of movement through an arc toward the same, a key lever, connecting means between said key lever and said type bar to start the latter on its travel toward the platen upon depression of the former and permit continued travel of said type bar.

store energy during the earlier movement.

of said type bar and to expend such energy to effect the latter movement of said type bar. 7

6. In a typewriting machine, in combina tion, a platen, adepressible key lever, a pivoted type bar, operative connections between said key lever and said type bar to effect initial movement of the latter upon depression of the former and to permit continued movement of said type bar independently of said key lever, energy storing means connected to said type bar to gradually and increasingly store energy during movement of said type bar by said key lever, and also connected with said type bar to expend such stored energy to effect 'continuedand final movement of said type bar for printing independently of said key lever.

In a typewriting machine, in combination, a pivoted type bar, a key lever and connections therebetween including an element pivotally connected to said type bar adjacent the axis of the latter, a weight pivotally connected to said type bar adjacent the axis of the latter but on the opposite side from the connection of suit element, and connecting means between Sdlltl weight and said type bar adjacent its free end.

8. In a typewriting machine, in combination, a pivoted type bar, a key lever, operative connecting means therebetween to start movement of the latter upon depression of said key lever and to permit continued movement of said type bar independently of said key lever, a toggle to silently arrest movement of said type bar onits printing stroke, and means connected with said type bar independently of said connecting means between the latter and said key lever to store energv during move ment of said type bar by said key lever, and

I said type bar and said key lever to start .movement of the former upon depression of the latter and to permit continued movement of said type bar independently of said key ,lever, and means independent o'f said connecting means to effect said continued movement of said type bar relatively slowly.

7 and relatively forcefully to effect printing by pressure and without noisy impact.

10. In a typewriting machine, in combination, a pivoted type bar, a weighted lever carried thereby to store energy during initial movement of said type bar and to expend such energy to effect final printing movement of said type bar, and means to silently cushion the final movement of said weighted lever.

11. In a typewriting machine, in combination, a platen, a key lever, a swinging type bar, operative connecting means between said key lever and type bar, a weighted lever having mechanical connections with said type bar independent of said connecting means, said weighted lever being arranged to be actuated by the swing of the type bar, and resilientmeans on said mechanical connection arranged to be moved into engagement when-the type bar is in printing position whereby the energy in excess of that required to effect printing is silently expended.

.12. In a typewriting machine, in combination, a pivoted type bar, a key lever, and

operative connecting means therebetween including a substantially U-shaped member pivoted at one end and connected for actuation at its other end by said key lever, a link pivotally connecting said member and said type bar, said link having an offset extremity and a return spring connected between the ofiset end of said link and the medial portion of said member.

13. In a typewriting machine, in combination, a pivoted type bar, a key lever, operative connecting means therebetween to effect accelerated movement of said type bar upon depression of said key lever and to permit continued movement of said type bar independently of said key lever, and means independent of said connecting means to effect continued decelerated print-.

mg movement of said type bar.

14. In a typewriting machine, in combination, a pivoted type bar, a key lever, operative connecting means therebetween to effect accelerated movement of said type bar upon depression of said key lever and to permit continued movement of said type bar bar independently ofsaid operating connections, including an energy storing member and arranged to control individually the entire swing of its type bar as it approaches the platen; said operating connec tions each including parts normally engaged but separable to allow the continued motion of the type bar under the control of said motion governing means after the actuating key lever-has come to rest.

16. In a typewriting machine, in combination, a platen, a type bar pivotally mounted adjacent one end and having type characters at its opposite end, a key lever, operative connections between said lever and said one end of said bar to effect movement of the latter towards said platen, and motion governing means including a toggle connected to said opposite end of said bar to limit the movement thereof toward said platen.

17. In a typewriting machine, in combina tion, a platen, a type bar pivoted adjacent one end. and having type characters at its opposite end, a key lever, operative connections between said lever and said one end of said bar to effect movement of the latter toward 18. In a typewriting machine, in sub-combination, a type bar having a pivotal axis adjacent one end and having type character at its opposite end, an element pivoted to said bar between the axis and type end of the latter and having a substantially Weighted free end, and link connections between the type d f aid bar and said lement to effect accelerated movement of the weighted end of said element about the point of connection of the latter to said bar during bodily movement of said element about the axis of said bar when the latter is actuated.

19. In a typewriting machine, in sub-combination, a type bar having a pivotal axis adjacent one end and having type characters at its opposite end, an element pivoted to narrate tion, a platen, a type bar having a pivotal axis adjacent one end and having a type character at its opposite free end, a key lever, operative connections between said lever and said bar. to effect relatively rapid movement of the free end of the latter toward the platen upon depression of the former, an element having a substantially weighted portion constituting means to store and expend energy, and operative connectidns between said bar and said element to efiect initially slow but gradually accelerated movement of the weighted portion of the latter for storing energy during movement of said bar by said lever and to effect continued but subtantially decelerated movement of said bar with augmented pressure by the weighted portion of said element in expending energy.

21. In a typewriting machine, in sub-combination, a type bar, a key lever, an operative connection therebetween to transmit initial accelerated movement to the former from the latter and to permit continued final movement of the former independently of .the latter, and means associated with said bar independently of said'connection to receive and store energy during said initial movement of said bar and to expend such energy in efi'ecting said final movement of said bar at substantially reduced speed.

22. In a typewriting machine, in combines tion, a platen, a medially pivoted type bar, a key lever, operative connections between said lever and one end of Said bar to effect initial movement of the latter toward said platen, and motion governing meansinclud-- ing a toggle connected to the opposite end of said bar to limit movement thereof toward said platen.

23. In a typewriting machine, in combination, a platen, a medially pivoted type bar,

a key lever, operative connections between said lever and one end of said bar to effect initial movement of the latter toward said platen, and means connected to the opposite end of said barv toefiect final and substantially slowed movement thereof toward said platen.

24. In a typewriting machine, in combination, a platen, a medially pivoted type bar,

a key lever, operative connections between said lever and one end of said bar to effect initial movement of the latter toward said platen, and means connected to the opposite end of said bar. to efi'ect final and substantially slowed movement thereof toward said platen and to limit said movement substantially independently of said platen.

In testimony whereof I affix my signature, in thepresence of two witnesses.

GEORGE G. GOING.

. Witnesses:

J. W. ANDERSON,

-FERDINAND Worm.

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