US1967436A - Typewriting machine - Google Patents

Description

y' 24, 1934. G. G. some 1,967,436

TYPEWRITING MACHINE Filed Jan. 17. 1930 3 Sheets-Sheet l INVENTOR 4 9 WITNESS- July 24, 1934. s. a. some 1,967,436 Q 'TYPEWRITING MACHINE Filed Jan. 17, 1930 3 Sheets-Sheet 2 A q Y aflwwrm ATTORNEY y 1934- G. G. GOING 1,

' TYPEWRITING MACHINE Filed Jan. 1'7, 1930 v 3 Sheets-Sheet 5 INVENTOR WlTNESS Patented 24, 1934 PATENT OFFICE.

UNITED; s-rAT-Es 36 Claims. (01. 19725) My invention relates to typewriting and like machines and more particularly to the type actions thereof.

The main object of my invention, generally stated, is to provide a simple-but nevertheless rapid and highly efficient, substantially noiseless, type action.

A further object of my invention is to provide simple and efiicient means whereby each pivoted type bar is actuated throughout a considerable portion of its printing stroke independently of its momentum accumulator and the accumulator is then actuated by the type bar and the stored energy of the accumulator is exerted on the type-carrying end of the type bar at the last portion of its printing stroke to eflect substantially a noiseless pressure imprint.

Another object of the invention is to provide means for holding each momentum accumulator against movement from its normal position until the associated type bar has moved independently thereof far enough to be brought into actuating engagement therewith.

Another object of my invention is to provide a substantially noiseless type action in which the platen alone and no part of the type action itself limits the printing movement of the type bar.

' A still further object of the inventionis to provide simple and eflicient means for preventing rebound of the type bars from normal position.

Still another object of the invention is to provide means whereby the type bars and certain of the associated parts, including the momentum accumulators, may be mounted for bodily case shifting movement to change from lower to upper case writing.

'To the above and other ends which will here-' inafter appear, my invention consists in the features of construction, arrangements of parts, and combinations of devices set forth in the following description and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters designate corresponding parts in the different views Fig. 1 is a vertical, central, fore and aft sectional view, showing suflicient parts of a typewriting machine to illustrate my invention in its embodiment therein.

Fig. 2 is a side view of a group of four sublevers.

Fig. 3 is a fragmentary, perspective view showing a portion of the supporting bar for the sublevers with one of the sub-levers in place.

Fig. 4 is a view corresponding in part to Fig.

1 but showing the type action in its actuated position. I

Fig. 5 is an enlarged," detail, transverse sectional view taken through the pivot of one of the sub-levers.

Fig. 6 'is a fragmentary, detail, top plan view of the machine with parts broken away.

The present invention, from certain aspects, is in the nature of an improvement on the construction disclosed in my application Serial No. 242,398, filed Dec. 24, 1927, having certain of. the same general objects in view, but providing more eflicient means for attaining such objects, as will hereinafter more clearly appear.

So much only of the machine is shown as is necessary to arrive at an understanding of the present invention.

A type bar segment 1 in the present instance is shown horizontally disposed and is slotted at 2 to receive the pivoted ends of type bars 3 mounted on-a pivot wire 4 carried by said segment. The plane of this pivot wire is disposed at substantially right angles to a plane passing tangentially of the platen 5 at the printing line. Each type bar throughout the system is devoid of lateral bends, but the printing faces of the types on the side type bars are beveled at difler- 85. ent angles to match the face of the platen. With this arrangement any pressureexerted on the type bar in the plane thereof may effectively produce an imprint free from any cranking or side action which would tend to throw the types ofl their fee and cause imperfect imprints.

In the present instance there is a full complement of forty-two type bars with two types 6 and 7 on each \bar, for the writing of eightyfour charactersl. A relative case shifting movement is effected between the platen and type bar. This is preferably brought about by mounting the type bars and certain of their associated .parts for case shifting movement, as will pres ently appear. It should be understood, however, that from certain aspects of the invention it is immaterial whether the type bars or the platen be shifted.

The type-carrying ends of the type bars are supported on a type bar rest, felt pad or cushion 1 8 supported by a segment 9, each type banmoving rearwardy in a radial plane from its position of rest around its pivot 4 to the printing point at the front of the platen, as shown in Fig. 4.

From certain aspects of the invention any suitable key controlled means may be employed for actuating the type bars, though I prefer to employ the means illustrated which have proved to be highly satisfactory.

In the present instance the heel of each type bar is provided with a projection having the rounded end that conforms substantially to the thickness of the type bar and is received and works in the same guide slot 2 as the companion type bar. Each rounded extension 10 is received in a substantially U-shaped engaging member 11 provided at the rear end of an actuating member, link or slide 12. As shown in Fig. 1 the rear upstanding arm 11 of each member 11 is normally out of contact with the rounded extension 10 on the companion type bar in order to provide a slight lost motion between these parts for purposes which will hereinafter appear. The amount of this lost motion is shown exaggerated in order to more clearly represent it.

Each member 12 is pivoted intermediate its ends, at 13, on a link 14 pivoted at its upper end, at 15, to a slotted segment 16 forming part of the segment 1. The rear end portion of each member 12 is received and guided in the same slot 2 in the segment 1 that the companion type bar works in, being supported on a segmental plate 17 that is detachably secured to the segment 1 and underlies all of the slots 2 therein.

The front end of each member 12 carries an upstanding contact 18 that projects to one side thereof and is'adapted normally to contact with the companion type bar, or an arm 19 thereon, and prevent rebound of the type bar from the type rest 8, as will hereinafter more clearly appear.

The downwardly off-set rear portion of each member 12 is pivoted at 20 to a pull link 21, which link in turn is pivoted at its forward end 22 to an arm 23 of a sub-lever, designated as a whole by the reference numeral 24.

Each sub-lever 24 may be said to have four arms. One the arm 23 to which a link 21 is connected. A second upper forwardly projecting arm 25 is connected to one end of a contractile returning spring 26 that has its other end connected to a curved strip or bar 27 secured at its ends by screws28 to side plates 37. A third forwardly extending lower arm 29 on each sub-lever 24 is pivoted to adepending link 30 having its lower end pivoted to a key lever 31. Each key lever is pivoted at its rear end on a fixed pivot rod 32 and is provided at its forward end with a finger key 33. The fourth arm on each sub-lever 24 is in the nature of a depending arm 34 pierced to provide a bearing opening that receives a pivot 35 by which the sub-lever is pivotally supported on a cross bar 36 secured at its ends to the side plates 37 of the machine by screws 38. A padded stop bar or arresting member 31 underlies all of the key levers and arrests the depression of each lever before the companion type bar reaches the printing point. I prefer to arrest each key lever when its companion type bar is about T33 of an inch from the platen, the completion of the printing movement of the type bar being effected by the stored energy of its momentum accumulator, as will presently appear.

The arrangement of the supporting links 14 is in an arc eccentric with the type bar pivot wire 4, so that the members 12 may be made of uniform size and shape, whereas the links 21 vary in length from the center to the sides of the system.

It will be understood that each type bar, its actuating member 12, link 21 and sub-lever 24 move substantially in the same radial plane, all of said radial planes converging at the printing point, whereas the key levers 31 move in vertical fore and aft parallel planes. Notwithstanding this, there is an avoidance of lateral or side strains, inasmuch as the depending link 30 which unites each sub-lever and key lever connects the two at the line where the planes of said levers intersect, as will be understood from a consideration of Fig. 6. This arrangement is rendered possible by the locating of the pivots 35 fore and aft of the machine, especially at the sides of the system, as indicated at the left-hand side of Fig. 6.

I construct and arrange the parts to obtain substantially a uniform leverage and dip of the keys throughout the system. It will be understood that the machine is controlled from a standard four bank key board, the key levers being of four different lengths. To compensate for this variation, the arms 29 of sub-levers 24 are made of four different lengths, as indicated in Fig. 2. The longest key levers will be connected to the sub-levers having the shortest arms 29, whereas, the shortest key levers will be connected to sub-levers having the longest arms 29, and so on, the remaining key levers will be connected to the sub-levers having appropriate length of lever arms 29.

Referring more particularly to Figs. 3 and 5 it will be seen that the cross bar 36 is slotted radially at 39 to conform to the radial arrangement of the sub-levers 24 and theparts actuated thereby. A sub-lever 24 is mounted on its pivot 35 to work in each of these slots. I prefer to construct the pivotal mounting for each sublever as follows: Downwardly extending drill holes are made in the bar 36, one such drill hole being centered in each slot 39 thereby providing a series of bearing openings each with semicylindrical side walls 40 on opposite sides of the slot and a bottom supporting wall 41. Each sub-lever has an individual pivot 35 provided with a cylindrical bearing surface that is received in a corresponding bearing opening pierced in the companion sub-lever 24. Each pivot 35 is provided with rounded ends 42 that bear against the semi-cylindrical side walls 40 of the companion bearing opening, thus maintaining the pivot against axial displacement irrespective of its angular position in the bearing opening, while the pivot is supported on the bottom wall 41 of the bearing opening. It will be understood that this provides a very simple form of construction that enables each sub-lever to be self finding in its guide slot 39, the pivot automatically accommodating itself to any radial disposition the sub-lever may be compelled to take in order to place it in its radially disposed guide slot 39. Inasmuch as these slots are all different, the present construction lends itself to rapid assembly of the parts without resorting to any nice separate adjusting of the pivots, such adjustment being automatic or self finding.

The depression of a printing key will result in first moving the associated member 12 forward without actuating the companion type bar. This is due to the lost motion between the actuating member 12 and the type bar and results in first releasing the contact 18 from the arm 19 on the the return ofthe type bar to normal position the contact 18 will move into contactive engagement with the arm 19 and prevent rebound of the type bar from its rest 8.

I wi1l now describe the controlling means by which each'type bar is slowed down as it approaches the printing position and is caused to be 'appliedwith substantially a noiseless pressure imprint.

- It is an important factor in such a machine that the force which causes the pressure imprint shall be exerted directly on each pivoted type bar near the type-carrying end thereof, and as near as possible directly towards the axis of the platen. This result I attain in the present intance by providing each type bar with an interal. forwardly extending arm '19 that is preferably curved around its pivot 4 as a center. This arm is in the plane of its type bar and is provided near its free end with a laterally extending contact or pin 43. The segment 9 is slotted at 44, each slot receiving, and a side wall thereof acting as a guide for, an arm 19 of a type bar. I

Coacting with each type bar is a weighted controlling member thaat constitutes a momentum accumulator, designated as a whole by the reference numeral 45. I'prefer' to employ a separate member 45 for each type bar. Each member 45 is mounted to turn on a segmental pivot wire 46 carried by. the segment 9 and to work in a slot 44 therein, preferably in the same slot in which the arm 19 of the companion type bar works. This -mounting provides for pivoting each momentum accumulator 45 near the type-carrying end of its companion type bar when the latter is at rest, and so that each, member 45 will move in a radial plane parallel with but adjacent to the plane of movement ofv its companion type bar. g Each momentum accumulator 45 comprises a normally depending weighted portion 47 and a slotted cam 48. :This cam extends from the point where the associated pin 43 makes initial contact therewith (as shown in dotted lines in Fig. 1) towards and closeto the pivot 46. Each type bar thus operates on its controlling member 45 with an accelerating leverage that increasesthe speed of the member 45 as the type bar approaches the printing. position, although about, say, two thirds of the movement of each type bar from its position of rest is effected in: dependently bf and free from obstruction by its controlling member 45,;thus enabling the type bar to attain a high speed with a light touch on the finger key before the companion controlling member is picked up and actuated. Moreover, it will be seen that when the controlling member is first picked up and actuated by the type bar the movement of said controlling member is very slight and is gradually increased and affordsan increased resistance .to the. movement of the typebar as the latter approaches the prnting position.

Means are provided for normally holding each member 45 against pivotal movement and in a position where the associated contact or actuating pin 43 will enter'the cam slot. therein when the companion type bar reaches the dotted line position in Fig. 1. In the present instance such means comprise two contact pins 49 and 50 carried by each member 45 and 'coacting with the opposite curved edges'of the arm 19 on the companion type bar. The effect of this construction is to hold each member 45 against pivotal movement until the associated bar has carried its arm 19 out of contact with the .coacting pins 49 and 50 and the contact 43 on said arm hasengaged its cam 48, as indicated in dotted lines in Fig. 1. A further continued motion of the type bar causes its member 45 to be picked up and actuated by the type bar.

' The movement thus given to the momentum accumulator 45 is very slow at first and is gradu-.- ally increased and affords an increased resistance as the type bar approaches the printing position slowing down the movement of the type bar. Motion continues to be transmitted from the finger key to the type bar and its controll'ng member 45 until the depressed key lever reaches the stop 31, arresting it and theparts 30, 24, 21 and 12 actuated "thereby. This occurs when the type is about 1%; of an inch from the platen. From this point to the end of the printing stroke, the type bar is actuated by its own momentum and from the stored energy of itsmomentum accumulator 45 which continues its motion after the arrest of the key lever, and effectively applies its force through the arm 19 directly tothe type-carrying end of the type bar and towards the axis of the platen and substantiallyin the plane of movement of the type bar. The slight lost motion between the end 10 of the type bar and its actuating member 11 enables this independent movement of the type bar to take place after the key lever has been arrested by the stop 31 and even in the event that the key lever is held depressed against said stop. The efiect of the foregoing operatfon is to apply the type against the platen with substantially a noiseless pressure imprint produced by the actuated'momentum accumulator.

It will be understood that there is nothing to' arrest the actuating movement of each momentum accumulator 45 except the arrest of the connected type bar against the platen, and "even afer such arrest of the type bar has been 'eifected the companion accumulator may con-' ber 45 after the type reaches the platen will L vary and depend materially on the force exerted by the operator on the finger key to actuate the type action. It will be understood therefore, that there is no necessity in the present construction, of obtaining the nice adjustment between the printing face of the platen and each type face at the end of the printing stroke, such as is required in noiseless machines employing a toggle to effect the imprint. In such last mentioned machines the toggle is substantially straightened at the time the imprint is made. It' is essential, therefore, that at this time an effective imprint be made since the type cannot move beyond such position. This requires a very nice adjustment of the parts to bring each type face at the-instant of imprint to the same forward position and to effect the same character of imprint against the platen or the.

paper thereon.- Even when thus properly adjusted the character of the imprints may be varied due to the increased or decreased thickness of the work sheets and carbon sheets employed; in other words, whether one or a greater number of work sheets are employed at a single writing. Means were provided in such machines to adjust theplaten fore or aft of the machine cured to the frame of the machine. separator 55 apertured to receive the companion. 45-

and relatively to the type faces to compensate for the decreased or increased thickness of the paper employed. Moreover, in such prior machines increased force exerted on the printing keys was of no value in increasing the manifolding effectiveness of the machine.

In the present machine none of the foregoing difliculties are presented, since the platen alone and no part of each type action limits the printing movement of each type bar. Due to this and other distinctions, highly efiicient .type actions are employed in which no such nice adjustments as those specified above are required,

in which the types may be applied with more or less force depending on the force applied to the printing keys thereby producing better and more satisfactory 'manifolding work, and in which nevertheless each type is applied with a substantially noiseless pressure imprint. All of this is aside from the. fact that the type actions of the present invention employ approximately 1200 fewer parts than are employed in the type actions of the No. 6 Remington Noiseless machine, for example.

In the present instance the controlling means (45) for each type bar consists of a single part or momentum accumulator operated on directly by the companion type bar after the latter has first received an independent movement towards the printing position and exerting its stored energy directly on the type bar at its type-carrying end to efiectively cause substantially a v noiseless pressure imprint.

In order to change the case positions of the type bars I have constructed the parts, in the present instance, as follows:

The segments 1 and 9 are united at their sides by members 51 each carrying a vertically disposed grooved track or raceway 52 (see Fig. 6) that receive anti-friction rollers 53. These rollers also are received in a companion vertically disposed grooved track or race-way 54 serollers 53 and maintain them separated is received in the space between each pair of tracks 52 and 54 and carries an arm or projection 56 that overlies a stop 57 with which case shifting limiting stops, one of which is shown at 58, coact. This construction is similar to that employed in the Monarch machine and it should be understood that the means employed for mounting and shifting the segment in such machine, "or any suitable means, may be employed for that purpose.

An upward shifting of the segments 1 and 9 from the normal lower case position will result in moving the type bars, and the members 45, 14, 12 and the rear ends of the links 21 upward bringing the upper case types 7 to position where they will be brought to the printing point on the actuation of the type bars. I understood that in this case shifting movement all of the links 21 turn at the points of their pivotal connection 22 with the sub-levers 24 while the latter with the links 30 and key levers 31 remain at rest. Each of the links 21 in this case shifting movement swings around its pivoted end 22 to substantially the same distance above a horizontal line passing through said pivoted end that the link is positioned in below said line in the lower case position of the parts.

While I have described the present construction with considerable detail, it should be understood that various changes may be made in A roller It will be the construction, and parts thereof may be employed without others, without departing from my invention as it is defined in the accompanying claims.

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

1. The combination of a platen, a series of pivoted type bars, key controlled means for actuating each type bar, and means for slowing down the movement of each type bar as it approaches the printing point and efiecting substantially a noiseless pressure imprint, said last mentioned means comprising a separate momen tum accumulator for each type bar normally free from operation by its associated type bar but arranged to' be actuated thereby at the last portion of its printing movement, a projection on each type bar near the type-carrying end thereof, and a normally disengaged pin and slot connection between each of said projections and the associated momentum accumulator.

2. The combination of a pivoted type bar having an arc-shaped ayn projecting therefrom near the type-carrying end of the bar, the arc of said arm being defined around the pivot of the type bar as a center, acontact on said arm, and a momentum accumulator having a slotted cam therein normally arranged in the path of said contact to pick up and actuate the accumulator as the type bar approaches the printing position and cause the stored energy of the accumulator to be exerted on the type bar near the type-carrying end thereof to effect a substantially noiseless pressure imprint.

3. The combination of a pivoted type bar having an arm extending laterally therefrom near the type-carrying end of said bar, a contact on said arm, and a pivoted momentum accumulator having a slotted cam thereon normally free from engagement with but in the path of movement of said contact to'be actuated thereby and control the type bar during the last part of its printing movement, whereby the first portion of the printing movement of the type bar is effected independently of the accumulator and the stored energy of the actuated accumulator will be applied to the type bar at the last portion of its printing movement to efiEect substantially a noiseless pressure imprint.

4. The combination of a pivotal type bar having an arc-shaped arm projecting therefrom near the type-carrying end ofthe bar, the

arc of said arm being defiuned around the pivot of the type bar as a center, a' contact on said arm, a pivoted momentum accumulator having a slotted cam thereon normally free from engagement with but in the path of movement of said contact to bring about an actuation of the accumulator thereby after the type bar has first received an independent movement and to exert the stored energy of the accumulator on the type bar at the last part of its printing movement to efiect substantially a noiseless pressure imprint, and means on said accumulator coacting with said arm to hold the accumulator in position to receive said contact in said slotted cam.

5. The combination of a series of pivoted type bars, key controlled actuating means therefor, means for mounting said type bars for bodily case shifting movement, and controlling means for slowing down the printing movement of each type bar and eifecting substantially a noiseless pressure imprint, said controlling means comprising an arm extending from the type-carrybars;'controlling means for slowing down the printing movement of each type bar at the last portion of its printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a separate momentum accumulator for each type bar normally free from operating connection with its type bar to permit a limited initial independent movement of the bar, means for actuating each momentum accumulator by its type bar after a limited independent movement of the bar has been effected and for exerting the stored energy of the accumulator directly on. the type-carrying end of its type bar; and means for mounting said type bars and accumulators for simultaneous case shifting movement.

7. The combination of a pivoted type bar, key actuated means for operating said type bar, and controlling means for slowing down the printing movement of the type barat the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator mounted to turn on a fixed pivot located near the type-carrying end of thetype bar when the latter is in normal position, a slotted cam on said accumulator, an arm on the type-carrying end of the type bar curved around the'pivot of the type bar as acenter, and an actuating contact carried by said arm and normally out of cdoperation with said cam but brought into cooperation therewith to actuate the accumulator as the type bar approaches the printing position.

8. The combination or a pivoted type bar, key actuated means for operating said type bar, and

' controlling means for slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator mounted to turn on a fixed pivot located near the type-carrying end of the type bar when the latter is in normal position, a slotted cam on said accumulator, an arm on the type-carrying end of the type bar curved around the pivot of the type bar as a center, and an actuating ,contact carried by said arm and normally out of cooperation with said cam but brought into cooperationtherewith to actuate the" accumulator as the type bar approaches the printing position, said contact approaching the pivot of the accumulator as the type bar approaches the printing position and gradually increasing the resistance to and slowing down the movement of the type bar.

9. The combination of a pivoted type bar, key actuated means for operating said type bar, and controlling means for slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator mounted to turn, on a fixed pivot located near the type-carrying end of the type bar when the latter is in normal position, a slotted cam on said accumulator, an arm on the type-carrying end of the type bar curved around1the 'pivot of the type bar as a center, an actuating contact carried by said arm and normally out of cooperation with said cam but brought into cooperation therewith to actuatethe accumulator as the type bar approaches the printing position, and holding means carried by said accumulator and which coact with said am to prevent the accumulator from turning on its pivot until said contact is in cooperative relation with said cam.

10. The combination of a pivoted type bar, key actuated means for operating said type bar; controlling means for slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator mounted to turn on a fixed pivot located near the type-carrying end of the type bar when the latter is in normal position, and means whereby the type bar 7 during the first portion of its printing stroke moves independently of said accumulator but actuates it during the latter portion of the printing stroke and causes the stored energy of the accumulator to be exerted directly on the type-carrying end ofthe type bar to produce a pressure imprint; and means for mounting said type bar, accumulator and controlling means for bodily case shifting movements.

11. The combination of a pivoted type bar; key actuated means for operating said type bar; controlling means for slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator mounted to turn on a fixed pivot located near the type-carrying end of the type bar when the latter is in normal position, a slotted cam on said accumulator, an arm on the type-carrying end of the type bar curved around the pivot of the type bar as a center, and an actuating contact carried by said am and normally out of cooperation with said cam but brought into cooperation therewith to actuate the accumulator as the type bar approaches the printing position; and means for mounting said type bar and accumulator for bodily case shifting movement.

12. The combination of a pivoted type bar; key actuated means for operating said type bar; controlling means for slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially anoiseless pressure imprint, said means comprising a momentum accumulator mounted to turn on 9. fixed pivot located near the typecarrying end of the type bar when the latter is in normal position, a slotted cam on said accumulator, an arm on the type-carrying end of the type bar curved around the pivot of the type bar as a center, an actuating contact car ried by said arm and normally out of cooperation with said cam but brought into cooperation therewith to actuate the accumulator as the type bar approaches the printing position, and holding means carried by said accumulator and which coact with said arm to prevent the accumulator from turning on its pivot until said contact is in cooperative relation with said cam; and means for mounting said type bar, accumulator and holding means for bodily case shifting movement.

. 13. The combination of a type bar segment, a series of type bars pivoted thereon, all of said type bars being devoid of lateral bends a second segment arranged above the type bar segment providing a support for the type-carrying ends of the type bars, a series of momentum accumulators one for each type bar pivoted on said second segment near the type-carrying ends of the type bars when the latter are at rest, key operated means for actuating each type bar, and means at the type-carrying end of each type bar for actuating its associated momentum accumulator only after the type bar has first received an independent movement towards the printing position and for exerting the stored energy of the actuated accumulator on the typecarrying end of its type bar at the last portion of the printing stroke to efiect substantially a noiseless pressure imprint.

14. The combination of a type bar segment, a series of type bar's pivoted thereon, a second slotted segment arranged above .the type bar segment and providing a support for the typecarrying ends of the type bars, a series of momentum accumulators one for each type bar pivoted on said second segment near the typecarrying ends of the type bars when the latter are at rest, key operated means for actuating each type bar, and means at the type-carrying end of each type bar for actuating its associated momentum accumulator only after the type bar has first received an independent movement towards the printing position and for exerting the stored energy of the actuated accumulator on the type-carrying end of its type bar at the last portion of the printing stroke to efiect substantially a noiseless pressure imprint, a portion of each type bar and its associated momentum accumulator operating in a single slot in said second segment.

15. The combination of a type bar segment, a series of type bars pivoted thereon, a second segment arranged above the type bar segment and providing a support for the type-carrying ends of the type bars, a series of momentum accumulators one for each type bar pivoted on said second segment near the type-carrying ends of the type bars when the latter are at rest, key operated means for actuating each type bar, means at the type-carrying end of each type bar for actuating its associated momentum accumulator only after the type bar has first received'an independent movement towards the printing position and for exerting the stored energy of the actuated accumulator on the type-carrying end of its type bar at the last portion of the printing stroke to effect substantially a noiseless pressure imprint, and means for mounting said segments with the parts carried thereby for case shifting movement.

16. The combination of a type bar segment, a series of type bars pivoted thereon, a second segment arranged above the type bar segment and providing a support for the type-carrying ends of the type bars, a series of momentum accumulators one for each type bar pivoted on said second segment near the type-carrying ends of the type bars when the latter are at rest, key operated means for actuating each type bar, an arm carried by each type bar at the type-carrying end thereof and curved around the pivot of its type bar as a center, and a contact on each arm for actuating its associated momentum accumulator and transmitting the stored energy of the accumulator to the typecarrying end of its type bar at the last part of its printing stroke, each accumulator being normally out of actuating connection with its type bar to afford an independent initial movement of the type bar towards the printing position.

17. The combination of a type bar segment, a series of type bars pivoted thereon, a second segment arranged above the type bar segment and providing a support for the type-carrying ends of the type bars, a series of momentum accumulators one for each type barpivoted on said second segment near the type-carrying ends of the type bars when the latter are at rest, key operated means for actuating each type bar, a slotted cam on each momentum accumulator, an arm on the type-carrying end of each type bar, a contact on each 'of said arms normally free from actuating engagement with the cam on the associated momentum accumulator but cooperative therewith during the latter portion of the movement of the type bar to printing position to actuate its momentum accumulator and cause the stored energy thereof to be applied to the type-carrying end of the associated type bar and effect substantially a noiseless pressure imprint.

18. The combination of a type bar, actuating means therefor, a frictional contact member movable into and out of contactive engagement with a portion of the type bar to prevent a rebound thereof and means controlled by said actuating means for bringing said contact member into contactive frictional engagement with the type bar at or about the time that it returns to normal position and for releasing said contact member from such engagement before the type bar is started in its movement to printing position.

19. The combination of a pivoted type bar having an arm thereon curved around the pivot of the type bar as a center, actuating means for the type bar, a contact movable into and out of contactive engagement with said curved arm to prevent a rebound of the type bar from normal position, and means controlled by said actuating means for controlling the movement of said contact into and out of engagement with said arm.

20. The combination of a pivoted type bar having an arm thereon curved around the pivot of the type bar as a center, key controlled actuating means for said type bar comprising an actuating link pivoted intermediate its ends on a supporting link and operatively connnected at one endto the type bar, and a contact at the other end of said actuating link movable thereby into and out of contactive engagement with said curved arm on the type bar to prevent a rebound of the type bar from its normal position.

21. The combination of a pivoted type bar having an arm thereon curved around the pivot of the type bar as a center, actuating means for the type bar, a contact movable into and out of contactive engagement with said curved arm to prevent a rebound of the type bar from normal position, means controlled by said actuating means for controlling the movement of said contact into and out of engagement with said arm, and a momentum accumulator actuated by said curved arm and operative thereon to slow down the movement of the bar as it approaches the 22. The combination of a pivoted. type bar having an arm thereon curved around the pivot of the type bar as a center, liey controlled actuating means for said type bar comprising an actuating link pivoted intermediate'its ends on a supporting link and operatively connected at one end to the type bar, a contact at the other end of said actuating link movable thereby into and out of contactive engagement with said curved arm on the type bar to prevent arebound of the type bar from its normal position; and a momentum accumulator actuated by said type bar .and operative thereon to slow down the movement of the bar as it approaches the printing position and apply it with substantially a noiseless pressure imprint.

23. The combination of type bar, actuating means therefor, a frictional contact member movable into and out of contactive engagement with a portion of the type bar to prevent a rebound thereof, means controlled by said actuating means for bringing said contact member into contactive frictional engagement with the type bar at or about the time that it returns to normal position and for releasing said contact member from such engagement before the type bar is started in its movement to printing position, and a momentum accumulator actuated by said type bar and operative thereon to slow down the movement of the bar as it approaches the printing position and apply it with substantially a noiseless pressure imprint.

24. The combination of a system of pivoted type bars all devoid of lateral bends and each having a rigidly connected arm projecting forward therefrom near the type-carrying end of the bar, and a momentum accumulator for each type bar actuated directly by its said arm and expending its stored energy thereon to effect a substantially noiseless imprint.

25. The combination of a system of pivoted type bars all devoid of lateral bends and each having an arc-shaped arm projecting therefrom near the type-carrying end of the bar, the arc of each of said arms being defined around the pivot of the associated type bar as a center, a contact on each of said arms, and a momentum accumulator arrangedin the path of each of said contacts to be actuated thereby and 'to apply the stored energy of said accumulator to the associated type bar to effect substantially a noiseless pressure imprint,

26. The combination of a system of pivoted type bars all devoid of lateral bends and each having an arc-shaped arm projecting therefrom near the type-carrying end, of the bar, the arc of each of said arms being defined around the t pivot of the associated type bar as a center, a

contact on each of said arms, a momentum accumulator for each type bar normally out of engagement with the associated contact but arranged in the path thereof to be actuated thereby and to apply the stored energy of said accumulator to the associated type bar to eifect substantially a noiseless pressure imprint, and means on each of said accumulators coacting with said arm on the associated type bar to hold the companion accumulator against movement until said contact has been brought into cooperation therewith.

2'7. The combination of a system of pivoted type bars all devoid of lateral bends and each having an arm curved around the pivot of the associated type bar as a center and attached to the bar near its type-carrying end, a pivoted momentum accumulator for each type bar normally free from actuation by the associated type bar but coacting withgand actuated by the arm thereon at the last portion of the printing movement of the type bar to slow down its printing movement and cause the stored energy of the actuated accumulator to exert its force on the associated bar and effect substantially a noiseless pressure imprint, and interengaging means on each of said arms and the associated accumulator to hold the latter against pivotal movement until such accumulator is to be actu-' ated by said arm.

28. The combination of a cylindrical platen, a system of pivoted type bars all devoid of lateral bends and pivoted in an arc the plane of which is at substantially right angles to a planetangent to the platen at the printing line, and means coacting with, the type bars for slowing down the movement of each type bar as it approaches the printing position and effecting substantially a noiseless pressure imprint, said means comprising a momentum accumulator for each type bar normally free from actuation thereby, and cooperating means on each type bar and its associated momentum accumulator for bringing them into cooperative engagement as the type bar approaches the printing point to actuate said momentum accumulator and apply its stored energy directly to its associated type bar near the type-carrying end thereof and thereby complete the printing stroke of the type bar with a force exerted thereon from its momentum accumulator directly at the typecarrying end of the type bar.

29.The combination of a system of pivoted type bars, all devoid of lateral bends and pivoted in an arc the plane of which is at substantially115 right angles to a plane tangent to the platen at the printing line, and means coacting with the type bars for slowing down the movement of each type bar as it approaches the printing position and eifecting substantially a noiseless pressure imprint, said means comp i ing a momentum accumulator for each type bar normally free from actuation thereby, and an arm extending from each type bar near the type-carrying end thereof and provided with means for actuating the associated momentum accumulator only after the type bar has first received an independent movement towards the printing position, the movement of each type bar to the printing position setting its associated momentum accumulator in motion and the stored energy of the accumulator completing the printing movement of the type bar.

30. The combination of a system of pivoted type bars all devoid of lateral bends and each 35 having'an arm extending therefrom near the type-carrying end of the bar, each of said arms extending in a curve around the pivot of the associated type bar as a center, a momentum accumulator for each type bar normally free from-actuation thereby but actuated thereby after the associated type bar has first received an independent movement, and means on each of said accumulators which coact with the associated curved arm to hold the accumulator against movement only during the independent movement of its type bar.

31. The combination of a system of pivoted type bars all devoid of lateral bends and pivoted in an arc the plane of which is at substantially 150 right angles to a plane tangent to the platen at the printing line, and means for slowing down the movement of each type bar as it approaches the printing position and effecting substantially a noiseless pressure imprint, said means comprising an arm on each type bar near the typecarrying end thereof and extending forward from the bar, and a pivoted momentum accumulator for each type bar normally free from actuating connection therewith so that the latter may move independently of its accumulator, each arm in the latter portion of the printing movement of the associated type bar coacting with the companion accumulator to actuate it, the actuated accumulator applying its stored energy through the companion arm to its type bar near its type-carrying end to effect a pressure imprint.

32. The combination of a system of pivoted type bars, all devoid of lateral bends and pivoted in an arc the plane of which is at substantially right angles to a plane tangent to the platen at the printing line, key actuated means for operating said type bars, and controlling means for slowing down the printing movement of each type bar at the last portion of its printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a separate momentum accumulator for each type bar normally free from operating connection with its type bar to permit a limited initial independent movement of the bar, and mean for actuating each momentum accumulator by its type bar after a limited independent movement of the bar has been effected and for exerting the stored energy of the accumulator directly on the type-carrying end of its type bar.

33. The combination of a pivoted type bar, key actuated means for operating said type bar, and controlling means for gradually slowing down the printing movement of the type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a pivoted momentum accumulator having a slotted cam therein and a pin on the type bar that engages in said cam slot and actuates the accumulator with a gradually accelerated camming movement, said pin normally disengaged from but brought into engagement with said cam after the type bar has first traveled independently of the accumulator towards the printing position, said slotted cam and pin connection causing the stored energy of the accumulator to be applied from in front of the type bar and directly to the type-carrying end portion thereof.

34. The combination of a system of pivoted type-bars, all devoid of lateral bends and pivoted in an arc the plane of which is at substantially right angles to a plane tangent to the platen at the printing line, key actuated means for operating said type bars, and controlling means for slowing down the printing movement of each type bar at the last portion of the printing stroke and applying it with substantially a noiseless pressure imprint, said means comprising a momentum accumulator for each type bar mounted to turn on a fixed pivot located near the type-carrying end of the associated type bar when the latter is in normal position, and controlling means whereby each type bar during the first port-ion of its printing stroke moves independently of its accumulator but actuates it during the latter portion of the printing stroke and causes the stored energy ofthe actuated accumulator to be exerted directly on the type-carrying end of its type bar to produce a pressure imprint.

35. The combination of a platen, a. system of pivoted type bars all devoid of lateral bends and pivoted in an arc the plane of which is at substantially right angles to a plane tangent to the platen at the printing line, key controlled actuating means for the type bars, a series of pivoted momentum accumulators one for each type bar, and means for effectinga direct operative connection between each type bar and its momentum accumulator only after the type bar has received an independent movement towards the platen and for applying the stored energy of the accumulator thus actuated directly to the type-carried end of its type bar and effecting substantially a noiseless pressure imprint, the construction and arrangement of said last mentioned means and the actuating means for each type bar being such that each momentum accumulator is arrested in its actuating movement wholly by the associated type bar bearing against the platen and the direct connection of the accumulator with its type bar, whereby each type bar may be applied to the platen with a varied pressure depending on the force exerted on its printing key.

36. The combination of a platen, a series of pivoted type bars all devoid of lateral bends and pivoted in an arc the plane of which is at substantially right angles to a plane tangent to the platen at the printing line, key controlled actuating means for each of said type bars, means for arresting each of said actuating means before its type bar reaches the platen, means for affording a continued movement of each type bar to the platen after its actuating means has been arrested, a series of momentum accumulators one for each type bar, and means by which each momentum accumulator is caused to coact directly with its type bar to be actuated thereby and exert its stored energy directly to the type- CERTIFICATE OF CORRECTION.

Patent No. 1,967,436. I July 24, 1934.

GEORGE G. GOING.

It is hereby terrified that error appears in the printed specification of the above numbered-patent requiring correction as follows: Page 2, line 74, for

"eccentric" read concentric; page 3, line 117, for "afer" read after; page 4, line 125, claim 4, for "pivotal" read pivoted; and line 128, for "deiiuned" read defined; page 8, line [03, claim 35, for "type-carried" read type-carrying; and line 131, claim 36, for "positioin" read position; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this llthday of September, A. D. 1934.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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