US1875255A - Typewriting machine - Google Patents

Description

Aug. 30, 1932. L. c. MYERS ET AL TYPEWRAITING MACHINE Filed June 5, 1951 2 Sheets-Sheet l a; Ma 6715' A TTORN E YS.

Aug- 30, 1932- L. c. MYERS ET AL 1,875,255

' TYPEWRITING MACHINE Filed June 5, 1951 2 SheetS -Sheet 2 A TTQRNEYS.

6P5 INVENTORS,

Patented Aug. 30, 1932 1 UNITED s'ra'r ss PATENT OFFICE LEWIS C. MYERS, OFFREEPORT, AND GEORGE E. HANDLEY, OF GLENDALE, NEW YORK ASSIGNORS 'IO ROYAL TYPE-WRITER COMPANY, INC., OF NEW YORK, .N. Y., A CQRIO- RATION OF NEW YORK TYPEWRITING MACHINE Application filed June 5, 1931.

This invention relates to new and useful improvements in typewriting machines generally, although more particularly to .improvements in tabulating mechanisms therefor.

Among the several objects of our invention are to provide a brake which functions automatically upon depression of the tabular key lever to retard the jump movement of the carriage to an extent sufficient to greatly reduce the impact of the carriage against the tabular stop; to provide such a brake which is automatically released upon release of the tabular key lever, and to provide such a brake for cooperation with the spring motor of the carriage.

With these and other objects in view which will more fully appear. the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings Figure 1 is a top plan view of a typewriting machine constructed in accordance with our invention, only such parts ofthe machine being shown as is necessary to illustrate the invention, v i 1 Figure 2 is a vertical cross section thereof,

Figure 3 is a rear view of the structure shown in Figure 1,

Figure 4 is an elevation of the right hand end of the carriage. the view including part of the shift frame, and the escapement pinion. and

Figure 5 is an enlarged sectional view taken on the line 5-5 of Figure 1.

' Like reference numerals designate corresponding parts throughout the several figures of the drawings.

In the accompanying drawings, we have shown our invention as being applied to a Royal portable typewriting machine equi ped with a tabulating mechanism as illustrated and described in the (lo-pending application of Lewis C. Myers, Serial No. 405,336, filed Nov. 7, 1929.

.The machine includes a main frame hayinga front wall 5. a rear wall 6, and side walls 7 and 8 respectively. The rear wall 6 Serial No. 542,446.

is provided along its upper and lower edges with inturned flanges 9 and 10 respectively. Supported on the main frame A for substantially vertical movements in the usual manner is a shift frame 13 which is raised by a shift key lever S, and movably mounted on this shift frame is a carriage C including a platen 11 and end walls 12 and 13 respectively. The carriage C is supported on the shift frame B through the medium of spaced upper rails 14, 1 1 and cooperating rails 15, 15, the former being fixed to the carriage and the latter being fixed to the shift frame. The carriage C is fed in a letter space direction by the usual spring drum 16 and escapement mechanism which includes an escapement pinion 17. The detail construction of the escapement mechansm is notshown as any ordinary escapement mechanism may be employed. Besides the escapement pinion 17, the escapement mechanism necessarily includes a feed rack 18 which is normally held in mesh with the pinion but is adapted to be disengaged therefrom whenever the tabular mechanism is thrown into operation or when it is desired to move the carriage in a letter space direction or in the reverse direction without employing the usual spacing key lever. In the present instance, the pinion 17 and the feed rack 18 are located below the carriage and between the rails thereof. The feed rack 18 is fixedly connected at its ends to rocking frames D and E which are in turn fulcrumed on alined pivots 19 and 20 supported on the end plates 12 and 13 respectively. Atabular rack 21 is located in rear of the carriage and is attached to the swinging frames D and E which are respectively provided with finger pieces 22 and 23. Thus upon depression of eitherfinger piece both rocking frames D and E will be simultaneously swung about their respective pivots and both the feed rack 18 and the tabular rack 21 will be swung in unison, thereby moving the feed rack toward and from or into and out of engagement with the escapement pinion 17. The tabular rack is provided on its inner face with a series of teeth 24 and mounted on said rack for independent adlar stops 25. Each stop is provided with a downwardly extending stop lug 26. Disposed under the tabular rack 21 is a combined lifting and stop lever J which includes a horizontal arm 27 and a downwardly extending vertical arm 28. This lever J is fulcrumed at its angle on a horizontal pivot 29 to a brackct-3O attached to the shift frame B. A stop pin 31 is fixed to the bracket 30 to limitthe downward movement of thehorizontal arm 27, and a coil spring 32 is connected at one end to the vertical arm 28 and at its other end to the bracket 30 and functions to yieldably retain the vertical arm 28 against the stop pin 31. The free end of the horizontal arm 27 is normally held by the spring 32 below'and in spaced. relation tothe tabular 11161621. It is evident -however, that when the lever J is swung about its pivot 29 and against the tension of the spring 32, the free end 27a of the arm 27 will engage the tabular rack 21 and thereby elevate the same. The upward movement of the tabular rack 21 will through the'medium ofthe swinging frames D-and E, cause the rack 18 to be swung rearwardly out of on gagement with the escapement pinion 17, and upon releaseof the lever J a. spring connected to the rocking frame willrreturn the parts totheir o-normal positions. Thus when the lever J. is swung to its operative position torelease the feed rack 18 from the escapement pinion 17, the'angled end 27a of the arm 27of said lever will be moved upwardly into the path of the depending stop lug 26 of the next adjacent tabular stop 25 and consequently the carriage will be moved by the drum 16 until said stop-26 engages the free'end of the arm 27 of the lever J. Upon release of the lever J the parts will be returned to their normal positions and the carriage stopped in. the adjusted position there v the free end of. In order to maintain. the end 27arof the arm 27 of the leverJ in sliding contact with the tabu1ar rack-21 during the upward movement of the latte'iy'we' have provided portion of the arm 27 with a guard shoe 33.

In order to operate the lever J from a point in front of the machine, we have provided a key-operated mechanism which includes a key lever 34 which is fulcrumed as at 35 to themain frameof the machine. A vertical rod 36 is disposed between the flanges 9' and 10ofthe rear wall 6 and is fixedly secured thereto'by any suitable means. J ournaled on the rod 36 is a bell crank lever 37 having arms 38 and 39 arranged at right angles to each other. A link 40 has its forward end pivotally connected to the key lever 34 and its rear end; pivotally connected to the arm 38 of the bell crank lever 37 A long link 41 is pivotally connected at one end to the arm 39 of the bell crank-lever 37 and at its other end to the vertical arm 28 of the v tively.

' The above constructioi'i is shown and de scribed in the Myers application referred to above. v v It has been foundin practice that when the tabul'ating key lever34 is depressed and the rack 18 thereby released from the escapement pinion 17, the carriage under the infiu ence of the motor 16 moves very rapidly, and the resultant impact of the stop lug 26 against the stop leverJ is quite severe. To lessen the shock or jar incident tofsaid inn actfwe have provided a brake mechanism for the carriage sion of the tabulating key lever 34. The

spring motor 16 which is mounted on the shift frame B, includes a brake. disc 44 and fulcrumed to swing about a vertical pivot pin 45 is a bell 'crank lever 4G. The pin 45 is mounted in a bracket 47 fixed'to the shift frameB, and the "bell crank lever 46 includes 9 which functions automatically upon depresshoe 50 is connected tothe'lateral arm 49 for movement toward and from the brake (113044;

of the motor, and a coil spring 51 connects a the rear arm 48 with the vertical arm 28'of the combined lift and stop lever J.

' Normally the spring 51 is not under tension and its ends lie loosely-in the holes in the I arms-28 and 48. A movement-of the arm 9.8 places the spring 51 under tension and causes the brake shoe 50 to move against the motor brake disc 44. It will,'therefore,be seen that the continued 'm'ovcment of the lever J 5 through'finger pressure on the key 34 will gradually increase the braking effect. This braking effect, however, is never positive because of the resilient spring, and no matter how much pressure is exerted 011 the-key. the spring 51 will permit sutficient movementof the motor to move the carriage without any undue resultant heavyshock between the tabular stop 25' and the stop lever J. Normally the motor drum is rotatable free ofthe movable brake shoe 50 and of the stationary brake shoe 50, and in operation thedrum is sufliciently snubbed between these two shoes.

The motor spring hub X is secured against. 1

rotation by the tension ratchet From the foregoing, it will be apparent that when the parts are in theirnormal po-, sitions, the brake shoe 50 will be disengaged from. the brake disc 44 of the motor; that upon depression of the tabular key lever 34,

the lever J'Wlll be actuated thus releasing the carriage from the escapement, mechanism 7 and simultaneously bra-king the drum through the application of the brakeshoe 50 by reason of the bell crank lever46 being.

'ocked by a pull exerted on the spring 51 by he combined lift and stop lever J, and that vhen the key lever 34 is released the spring :2 Will return the tabular parts to their nornal position and the spring 51 will return he brake shoe to its ineffective position.

We claim 1. A tabulating mechanism for typewrit ng machines comprising a carriage; an es- :apement pinion; a motor for moving the :arriage in letter space direction; a tabular ac]; and a feed rack pivoted to the carriage ;0 move in unison whereby the feed rack is noved into and out of engagement with the )inion; stops on the tabular rack; key operited stop means including a combined lift ind stop lever engageable with one of the racks to move the feed rack out of engagement with the pinion and for cooperation with one of the tabular stops to limit the novement of the carriage by the motor; and iormally ineffective means for braking the novement of the carriage connected to the :ombined lift and stop lever for rendering ;aid means effective automatically upon dis angagement of the feed rack from the es- :apement pinion.

2. A tabulating mechanism for typewritng machines comprising a carriage, an es- :apement pinion; a motor for moving the :arriage in letter space direction including a. brake disc; a tabular rack and a feed rack pivoted to the carriage to move in unison whereby the feed rack is moved into and wt of engagement with the pinion; stops on ;he tabular rack; means engageable with one of the racks to move the feed rack out )f engagement with the pinion and for coiperation with one of the tabular stops to limit the movement of the carriage by the motor; and normally ineffective means for oraking the movement of the carriage renlered effective automatically upon disengagement of the feed rack from the escapement ginion comprising a lever, a brake shoe connected tothe lever for cooperation with the brake disc of the motor, and a connection between the lever and the rack moving means for operating the former upon movement of the latter.

for braking the movement of the carriage rendered effective automatically upon disengagement of the feed rack from the escapement pinion comprising a bell crank lever, a brake shoe connected to one arm thereof for cooperation with the brake disc of the motor, and a connection between the bell crank lever and the combined stop and lift lever for operating the former upon movement of the latter.

4. In a typewriter, the combination with a main frame, of a shift frame mounted thereon; key operated means for moving the shift frame; a carriage mounted on the shift frame for letter space movements; an escapement mechanism for the carriage including a pinion mounted on the shift frame and a feed rack mounted on the carriage for movements into and out of engagement with the carriage; a motor mounted on the shift frame formoving the carriage in letter space direction; a tabular rack mounted on the carriage; tabular stops mounted on the tabular rack; key operated means mounted on the main frame including a lever for disengaging the feed rack from the pinion and for cooperation with one of the tabular stops to limit the movement of the carriage by the motor; normally ineffective brake means for the motor mounted on the shift frame, and connections between the lever and the brake means for rendering the latter effective upon movement of the former.

In testimony whereof, we have hereunto subscribed our names.

LEWIS C. MYERS.

GEORGE F. HANDLEY.

3. A tabulating mechanism for typewriting machines comprising a carriage; an es- :apement pinion; a motor for moving the carriage in letter space direction including a brake disc; a tabular rack and a feed rack pivoted to the carriage to move in unison whereby the feed rack is moved into and out of engagement with the pinion; stops on the tabular rack; key operated stop means including a combined lift and stop lever engageable with one of the racks to move the feed rack out of engagement with the pinion and for cooperation with one of the tabular stops to limit the movement of the carriage by the motor; and normally ineffective means

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