US2383260A - Typewriting machine - Google Patents

Description

Aug. 21, 1945. J. J. KITTEL TYPEWRITING MACHINE OriginalFled July 3Q 1943 WQ ww QN, @n N W www ww N m.. www mu mw a @Y f Y, n fm SQ Nw .wm RW ,Tm l u ,www V ,xvmm 3 www mK.. m H mm f a Nw mJ m M VN. .1. mwN Q MQ QMM JA w ww NN 0MM/M #SW www S\ www am www wfg @www5 Y n z vv A. o Mv/ ll .n...... .w Ww uw M m mm ...V :1.I1ll I... w M @66N .E Y w v /I m. MN @s Nv N. mn uw ./f 1- NJW QM. NW NN \.QW QN .am .wm @Y .mwmvvhu www Kfourmi) lSTATI-:s Pii'rlezlvr-v OFFICE TYPEWRITING MACHINE Jaim Joseph Kittel, st. Albans, N. Y., assigner to Royal Typewriter Companyg Inc., New York,

V N. Y., a corporation of New York Original application July 3, 1943, Serial No. 493,450. Divided and this application March 4, 1944, SeriaiNo. 525.060

2 Claims. (Cl. IS7-107) This invention relates to typewriting or like machines, and more particularly to means for preventing operation of mechanism `for actuating a type bar or other printing member when associated `mechanismV for actuating a companion type bar or printing member is in operation.

This application is a`division ofmy copendlng application SerlalNumber 493,450, led July 3,

Other objects will become apparent from a' reading of the following detailed description, the appended claims, and the accompanying drawing in which:

Figure 1 is a fragmentary vertical, fore and aft section of a typewriter mechanism embodying the invention;

Figure 2 is a fragmentary detail elevation of a safety lock mechanism embodying the invention drawn on an enlarged scale; and

Figure 3 is a fragmentaryhorizontal section on the line 3-3 of Figure 1.

The invention is capable of being embodied in typewriting machines of various kinds. For the purposes of illustration it is shown in connection with a typewriter the general construction and arrangement of many of the parts of which conform to the well known Royal Standard typewriter construction.

The typewriter illustrated comprises a main frame A on which a. carriage B equipped with a platen C is mounted for letter spacing and return movements.

When'the machine is conditioned for opera.- tion, the carriage B is urged to move in the letter spacing direction under the control of an escapement mechanism unit generally designated D. 'Ihe escapement mechanism comprises a fixed frame 6 which pivotally mounts a rocker 1 carrying a fixed dog 8 and a pivoted dog 9 cooperable in the usual manner with an escapement wheel I0. 'Ihe Wheel I0 is connected through a pawl Ito a pinion Il normally in mesh with an escapement rack I2 mounted on the carriage.

A universal frame I3 includesfarms one of which is shown at I4 pivoted at I5 on a frame mounted bracket I6. The universal frame is u rged rearwardly by a spring l1 and includes a universal bar I8 adapted to be pulled forwardly upon the depression of one of the usual key levers or the space bar. Adjustably mounted on the frame I3 is a pressure plate I9 adapted to push against a roller 20 journaled at the lower end of a spring arm 2| carried by the rocker 1. When the frame I3 is rocked clockwise as viewed in Figure l, the plate I9 pushes the roller 20 so as to rock the rocker 1 and operate the escapement mechanism D to effect a single letter spacing movement of the carriage in the usual manner. The usual space bar (not shown) having the arms 2lb is connected by a link 2 I*s to the universal frame i 3. The escapement rack l2 is mounted on a bail 2.2 which is pivoted as at 23 on the carriage end plates one of which is shown at 24. Springs (not shown) respectively interposed between the carriage end plates and rearwardly extending arms integral with the bail 22 normally hold the rack l2 down in engagement with the escapement pinion Il. For permitting tabulating movements of the carriage B, the bail 22 and the rack l2 are rocked clockwise as viewed in Figure 1 by a tabulating rack lift lever pivoted on the main frame and being formed with an ear 30 engageable with the bail 22 in the usual manner.

The travel of the carriage in letter spacing and return directions is limited respectively by margin stops mounted on a. margin stop bar 318 and being cooperable with a center stop 39. The right hand margin stop is `shown at 36 in Figure 1. `Then the carriage approaches the end of its travel to the left in the letter spacing direction, the margin stop 36 operates a, line lock lever 40 so that when the carriage is brought to rest by the center stop 39 the key levers cannot be operated. The line lock lever 40 is pivoted as at 4I on the 'center stop 39 and is formed with a. downwardly extending arm 42, the lower end of which is connected by a link 43 to one ann 44 of a lever 45 pivoted as at 46 'on frame brackets 41. A spring 48 interposed between the lever arm 44 and a frame mounted ear 49 biases or urges the lever 45 and line lock lever 40 to non- Y line locking position, movement of the parts under the urge of the spring 48 being limited by engagement of a. stop projection 50 on the lever 45 with the frame A. Another arm 44a of the lever 45 is connected by a link 5I to a key lever blocking device, which in the form shown 'comprises a line lock plate 52 pivoted as at 53.

'I'he usual case shift member, in the lform shown a type bar segment E, is mounted for vertical shifting on the frame A and is equipped with a pivot Wire 54 which mounts the usual complement of type bar members, one of which is shown at 55. Each type member 55 is formed with a short arm 56 connected by a link 5,1 to an intermediate lever 58 pivoted as at 59 on the key lever bracket 60 carried by the frame A. The bracket 60 also mountsthe key levers 6| which are pivoted on a fulcrum shaft 62 and are urged upwardly against a stop 63 by returning springs 64. Each key device 6| is connected by a link 65 to a front lever 66 pivoted as at'61 on the frame A. The type bars 55 normally and when in inactive position are supported at their free ends by a head rest 68.

In the conventional Royal Standard construction, as for example the construction shown `in they patent to Henry J. Hart, No. 2,202,451, granted May 28, 1940, each of the front levers corresponding to the lever 66 shown in Figure 1 is connected by a link to an associated intermediate lever corresponding to the lever 58 shown in Figure 1 so that upon depression of a key lever, manually applied force is transmitted to the type bar for moving it to printing position. The invention claimed herein may be embodied either in typewriters in which manually applied force is relied upon for actuating the type bars, or in typewriters in which depression of a key lever controls the action of power means which appliesv the actual force for moving the type bars to printing position. In the illustrative embodiment depression of a key lever is utilized to disable a restraining device so as' to permit power operable means to apply the elort for moving the associated type bar.

It will be understood that a key lever 6|, the type'bar 55 and associated parts shown in the drawings are representative of each ofthe plurality of type bar actions and associated key mechanism although only one complete type bar action is shown. The description of one complete type bar action is-intended to serve as a description of the other type bar actions,

The carriage B may be urged in the letter spacing direction by any suitable means, for example by the usual spring barrel motor or by mechanism disclosed in the parent application Serial Number 493,450 referred to above, and disclosed and claimed in the co-pending divisional application Serial Number 525,058, filed March 4, 1944. In this mechanism a gear, a portion of which is shown at |06, constantly urges a carriagedrive rack |08 to move the carriage in the letter spacing direction. The carriage is connected to a cam shaft |69 by gearing not shown herein but fully disclosed in the copending applications referred to. 'I'he arrangement is suchthat for each letter spacing movement of the carriage the cam shaft |69 turns through one eighth of a complete revolution.

The mechanism' for operating and for controlling the operation of the type bars 55 is claimed in the parent application Serial Number 493,450 and is similar in some respects to mechanism disclosed in the copending application of JohnJ. Kittel, Serial No. 493,449, led July 3, 1943. Depressing of a key lever 6| is not made effective for applying manually exerted force for moving the type bar 55 on its printing stroke, but is utilized for releasing Vthe restraint on a spring 19 connected between the intermediate lever 58 and an adjusting plate |51 pivoted as from being rocked by the spring 19. In order to at |58 on the frame A. When released, the spring 19 contracts and rocks the lever 58 counterclockwise, thereby swinging the type bar to printing position.

Depending from a curved slot |59 in the leve 58 is a. link |60 pivoted at its lower end to a. cam

follower lever' |6|`in turn pivoted as at |62 on` |64 of a releasable bar lock keeper |65 pivotedV as at |66; 'I'he roller |63 also is releasably restrained against upward movement by the crest of one of the eight lobes |61 on a resettingmember comprising a cam |68 secured to the shaft |69. Normally the cam |68 is positioned with the crest of a lobe |61 directly above the roller |63. Thus, both the bar lock keeper |65 and the cam |68 normally prevent rising of the roller |63 and therefore normally restrain the lever 58 discontinue the restraint of both the keeper |65 and the resetting member |68 and permit the spring 19 to contract and drive the type bar to printing position it is necessary to displace the restraining face |64 of the keeper |65 from above the roller |63 and also to rotate the cam |68 so as to allow the roller to move into the depression between two cam lobes |61.

The bar lock keeper |65 is adapted to be rocked upon depression of the associated key 6| for displacing the restraining face |64 from above the roller |63. For thisI purposean arm |18 on the keeper |65 is connected by a link |18 to the key operated lever 66. Thus, upon depression of the key 6|, the link 65 will rock the lever 66 clockwise to pull on the link |18a and rock the keeper |65 counterclockwise thereby mming the keeper face |64 away from the roller |63.

Thereafter, to enable the spring 19 to actuate the lever 58, link 51 and type lbar 55, the cam |68 is rotated one-eighth of a revolution. While the depression between the lobe |61 last positioned above the roller |63 and the next adjacent lobe is presented above the roller the lever |6| is free to rock clockwise. Hence the spring 19 contracts and rocks -the intermediate lever 58 counterclockwise unrestrained by the link |60 and lever |6|, and the link 51 is pulled forwardly to swing the type bar 55 to printing position, as shown in Figure 1.

The force of the type [bar printing impact may be varied by turning an adjusting screw |19 carried by the adjusting plate |51 and having its end engaging a xed part of the frame A. If the screw |19 is'turned to rock the adjusting plate |51 clockwise as viewed in Figure 1, the springs 19 associated with the respective type |bars will be subjected to additional tension so as to be capable of swinging the type bars 55 into printing position with more force. Adjustment of the tension of the springs 19 is accompanied by a variation in the force required to depress the key levers 6|y thus requiring a heavier touch to effect operation of a type bar. additional tensioning' of the springs 19 causes therollers |63 to be held against the keepers |65 with greater force, thereby requiring additional manually applied effort for moving the keepers |65 from engagement with the rollers For operating the escapement mechanism D in response to the depression of a key lever 6|, a supplemental universal bar is pivoted. at |66 and is engaged by projections|8| formed respec- This is because tively -on the bar keepers |65. An arm |82 on the supplemental universal bar |80 is connected to the escapement frame I3 by a pull rod |83 having its rear end hooked at |84 to embrace the rod I8 on the universal frame I3. Thus, when a key lever 8| is depressed, the associated keeper |85 is swung counterclockwise to the position shown in Figure 1thereby rocking the supplemental universal bar `|80 counterclockwise and swinging the universal frame I3 clockwise to actuate the escapement mechanism. When the key lever is released, the springs I1 and 64 will contract to restore the parts to their positions.

Normally each type bar actuating .spring 19 is restrained by engagement of the associated roller |83 with a lobe |81 and with the associated keeper restraining face |84. When a key lever 8| is depressed, the associated keeper |65 is swung to the position shown in Figure 1, thereby rocking the supplemental universal bar |80 and operating the' escapement mechanism D in the manner previously described. When the carriage moves in response to operation of the escapement mechanism the cam shaft |89 is rotated as explained above. As the cam lobe |61 which was in contact with the roller |83 prior to operation of the key lever 8| moves from above the roller |83, a cam depression willbe presented above the roller |83 and the roller will be enabled to rise so as to permit the spring 19 to move the 'type bar 55 to printing position, the retreating cam lobe piloting the type par to typing position. The type barwill reach printing position when the cam shaft has moved through one-sixteenth of a revolution, the parts then being positioned as shown in Figure 1. During the next one-sixteenth of a revolution of the cam shaft |89, the next or following cam lobe |81 will engage the roller |83 so as to move the ann |8| downwardly, thereby restoring the type bar 85 to its position of rest, reloading the spring 19, and enabling the restraining face |84 of the .keeper |85 to move over the roller |83. The parts will then have been returned to their normal positions and the escapement mechanism D will have arrested the carriage and theV cam shaft |89.

As shown in Figure 1, the shape and size of the cam |88, the mounting of the type member 55, and the connections between the roller |83 and thetype member 55 are so interrelated that the roller |83 is out of contact with the cam |88 when the type member 55 reaches typing position. Thus the cam |88 is effective for restrainling or piloting the type member during part of the typing stroke but not during the last part of the stroke. Consequently the adjustment of the spring 19 can be effective for varying the force of the type impact.

shape with the leg 332 normally extending diagonally across the paths of the abutment heels 333. When the key lever is depressed the abutment heel 333 engages the operating part 332 and rocks the blocking part 52 rearwardly from its normal forwardly offset position to the position shown in full lines in Figure 2. The line lock plate 52 will then be disposed directly under the toes 335 of the aligned key lever abutments 334 so as to prevent operative downward movement of the other key levers. This operation of the safety lock does not disturb the line lock lever 40 because the link 5| interposedl'between the line lock plate 52 and the line lock lever 40 has its frontend connected to the line lock plate 52 by a one way drive connection including a part 336 of the link 5| and a slot 331 in the line 4lock plate. Thus rearwardfmovement of the link position but rearward movement of the line locking plate caused by depression of a key lever 8| i will not move the linkv 5|.

comprisingthe parts 52 and 332 is generally of V l The mechanism describedwith reference to the drawings embodies the invention in the form now preferred, but it is evident that changes may be made without departing from the invention as defined in the claims.

I claim:

1. In a typewriter orlike machine, a plurality of type members; means including a plurality of key levers associated respectively with said type members for effecting selective operation of said type members; aligned abutments on said key levers, each including a heel and a toe spaced horizontally from said heel and at substantially the same level therewith; a blocking device; and means 'pivoting said device to rock about an axis parallel to the direction of alignment of said abutments, said device comprising a blocking part positioned out of the paths of said abutment toes when said device is in normal position and an operating part formed integrally with the blocking-part and normally being disposed in the paths of said abutment heels and being engageable by the abutment heels on an operated key lever for rocking said device to position said blocking part thereof in the paths of the other abutment toes.

2. In a typewriter or like machine, a plurality of type members; means including a plurality of key levers associated respectively with said type members for effecting selective operation of said type members; aligned abutments on said key levers respectively, each including a heel and a toe spaced horizontally from said heel and at substantially the same level therewith; a. blocking device; and means pivoting said abutment to rock about an axis parallel to the direction of alignment of said abutments, said device being generally V shaped in cross section and including a blocking leg normally disposed laterally offset from the -paths of said abutment toes'and an operating leg, formed integrally with the blocking leg and extending diagonally across the paths of said abutment heels and being engageable by the abutment heel of any operated key lever for rocking said device to position said blockingleg in the paths of the abutment toes.

on the other key levers.

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