US1128612A - Type-writing machine. - Google Patents

Description

A. G. P. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 1a, 1914 1,128,612, Patented Feb. 16, 1915.

3 SHEETS-SHEET 1.

N mvENTom ATTO N BY.

A. G. F. KUROWSKL,

TYPE WRITING MACHINE.

APPLICATION FILED JUNB18,1914.

1,128,612, Patented Feb.16, 1915.

8 SHEETS-SHEET 2.

FIG. 2.

WETNESSES: INVENTOR.

43ml) Wj/ WU' W122 BY 5/ I ATTO "-(EY.

A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE18,1914

1,128,612, Patented Feb. 16, 1915.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD 'IYPEWRITEB COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Feb. 16, 1915.

T all whom it may concern.

Be it known that I, ALFRED G. F. KURow- SKI, a citizen of the United States, residing in Brooklyn borough, in the county of Kings, city and State of New York, have invented certain new and. useful Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to improvements in typewriting mechanism for writing upon stencil cards, although it may be used for various other purposes.

The stencil card usually comprises aframe and a body portion consisting of thin paper, treated for typewriting stenciling purposes. The frame is usually made of cardboard or heavy paper. In writing the stencil upon the typewriting machine, it is desirable to silence the ribbon vibrating mechanism f' the typewriter so that the types can strike directly upon the stenciling paper, in order to cut the stencil sharply. t is also, however, desired to write upon the frame itself.

In writing on these cars, it is usual to insert thecard 1n the t pewriter and then write, through the usuai ribbon mechanisimupon the frame of the card, and then silencing the ribbon vibrating mechanism and writing upon the stencil.- Aftor withdrawing the card, the ribbon mechanism is again adjusted by the operator to be effective at the type strokes, so that the frame of the next card may be written upon, and then the operator must cast off the ribbon mechanism again in order to write upon the stencil itself.

One of the main objects of theinvention 'is to relieve the operator of the necessity of remembering to cast off and restore the ribbon silencing mechanism for every sten oil, and to avoid mistakes that are likely to occur if the operator forgets to attend to these duties, and also to save the time and effort required for manipulating the ribbon silencing and restoring mechanism for every stencil card.

In carrying out my invention, there 1semployed a card holder mounted upon the typewriting machine into which the card 15 caught. preparatory to writing. thereon; the card holder being movable after the-card is inserted therein to bring the card into sition for writingupon the frame, pre er abDy the top bar or rail" of the frame. The

ribbon silencing and! restoring mechanism: is;

jumps up above theprinting int. vibrant condition is maintained:

connected to be operated by this card holder, so that when the card is inserted and the card holder is moved to carry the card into position for writing on the top bar-of the frame, the ink ribbon is thereby connected up to operate upon the ty e strokes. But when the line-spacing mee anism, or other 7 device, is operated to advance the card in line-spacing direction so that types may be -made upon the stencil itself, the ribbon mechanism is automatically silenced so that the types print directly .upon the stencil.

In carrying out the invention, there is preferably employed a card holder invented by Jesse A. B. Smith, this card holder being supported normally independently of gages" the ribbon vibration control mechanism to vibrate the ribbon, andiholds the ribbon invibration duringthewriting of the entire line, the ribbonvibration'control mechanism being mounted on the frame of the typewriter, and the platen and card holder being mounted on the paper carriage;

but the connections being made for the card holder to hold the ribbon mechanism in operative condition during the writing of the entire line on the top of the stencil card; frame. As soon as the platen is line-spaced or advanced, the operator releases the ribbon vibration control mechanism which then returns to normal position, silencing the rib bon. As usual in the Underwood t writing machine, the ribbon is normal y below the printing line, but at everytype stroke it This In my device, during the writing of one or we lines, on the top bar of theframe, but after the platen is advanced so far that writing may be done upon the tbinstencil' body,- the mechanism is released from the control oi the card holder, and returns to the ribbon silencing position, so that the ribbon does not vibrate up and down atthe type strokes, and hence, the types may cut the stencils sharply. f

In one .form of the invention as illustrated in the drawings, a bell-crank is mounted upon the machine frame having an arm to actuate the ribbon controlling mechanism, and having another arm to be actuated by said card holder on the carriage; there being provided on the carriage, a lon bar which is swung back by the card hol or to engage a wrist provided on said bell-crank, and thereby hold the bell-crank in normal position during the travel of the carriage, by being engaged along the bar, said bar being of the length of the stencil card itself. This ribbon shifting bar on the carriage is itself operable by the rack bar provided upon the card holder and meshing with a pinion carried by the platen, the bottom end of the rack striking an arm or cam provided upon said bar.

Other featuresand advantages will hereinafter appear. I

In the accompanying drawings, Figure 1 is a perspective front elevation of a typewriter'carriage provided with a stencil or card holder, the connecting means for operating said holder with the platen rotation, and certain portions of the mechanism whereby the ribbon vibrating mechanism is controlled in the operation of said card holder.- Fig. 2 is a side elevation showing the typewriter frame outlined, and certain of the cooperating parts including a typebar, and platen shifting mechanism, in conjunction with the card holder operating means, the ribbon vibrating means, and the cooperation between the ribbon vibrating mechanism and the mechanism controlling the card holder; this view showing the card holder mechanism prior to'lowering the card holder across the platen for writing the first line thereon. Fig. 3 is a detail in side elevation of that portion of the mechanism employed in operating the card holder and in controlling the ribbon mechanism thereby; this view showing the card holder mechanism as movedto support the card holder across the platen in readiness for writing the first line, and also showing the ribbon vibrator as thrown into operative position. Fig. 4 is an enlargeddetail of a portion of the ribbon vibrating mechanism. Fig. 5 is a detail side elevation of the line-spacing mechanism. Fig. 6 is a detail side elevation partly in section, showing a type-bar striking'the platen over the upper frame portion of a stencil work-piece for upper case, the holder being in the first position. Fig. 7 is a corresponding view showing the card holder advanced to the second position, here operating in lower case upon the stencil portion of the work-piece. Fig. 8 is a similar view showing the card holder advanced to the last position for writing the last line upon the stencil.

The invention is herein illustrated as applied to an Underwood typewriting machine, although, obviously, it is applicable to other typewriting machines.

The drawings show a portion of the frame of a typewriting machine designated by the numeral 1, also the carriage 2, the platen frame 3' and the platen 4 supported in said frame by its axle 5, which has the usual finger piece 6 and line-space wheel 7, said line-space wheel being operated by a pawl 8. The usual ribbon vibrating mechanism is also shown comprising a rock shaft 9 extending rearwardly through the machine from the front portion of the frame, the shaft being connected at its rear end to an arm 12 extending therefrom, a pivotal link 13 pivotally connecting said arm to an actuator 14, which is adapted to slide longitudinally upon a plate 15, said actuator being connected with said link by a stud 16 working in a slot 17; said actuator having a forwardly extending lug 18 with a vertical slot 19 to permit play therein of a wrist 20, which extends from a lever 21 pivoted to a bracket 22, carried by a rail 23, said lever continuing forwardly into a goose neck 24 which connects with a ribbon vibrator 25. These parts of the ribbon vibrating mechanism, in conjunction with a universal frame 26, are substantially as used in the Underwood typewriting machine and necessarily illustrated herein because of their cooperation with my improved means for automatically actuating said ribbon vibrating mechanism in the operation of a stencil holder. v

The stencil holder complementary to the present example of this invention, is, as stated, that shown in the invention of Jesse A. B. Smith, and comprises the fingers 27 carried by a strip or bar 28, which is held in operative relation with the platen by racks 29 at opposite ends of said bar, said racks meshing respectively with gear wheels 30 connected at the opposite ends respectively of the platen to rotate therewith, the racks having pins 31 to ride in slotted guideways 32 to guide said racks in a curved path so that the fingers 27, which have hoops or catches 33 at their lower ends to support a work-piece, may be carried in a curved path across the platen surface.

It will be understood that a work-piece, such as a stencil sheet having a surrounding frame, when supported in the holder consisting of the fingers 27, may be carried downwardly across the printing surface of the platen through the action of the gears 30 and racks 29 in the rotation of the platen, until the top bar of the frame lies over the printing surface in position to be struck by the types; and the holder actuating mechanism may, as stated in said stencil holder in vention, have its rotating movement limited in one direction to so present the top bar of the stencil work-piece to the types, and may also be limited in its movement in the other direction in advancing a work-piece across the platen for line-spacing, that it may not be rotated beyond the point where the last line may be written upon said work-piece.

Since the purpose of the invention is to further facilitate the operation of writing on a stencil having edge-inclosing frames where it is desired to write in ink upon the upper bar of the frame and to cut through thestencil sheet with the bare type, my invention consists of means which I will now describe, whereby the act of moving a holderof the aforesaid character downwardly across the platen to position for writing upon the upper bar of the stencil workpiece, automatically throws the ribbon vibrating mechanism from a normal neutral position to the operative vibrating position, whereby while actuating the types for writing upon said upper bar, the ink ribbon will become interposed between the types and the work-piece at each stroke in the usual manner, and also whereby, when the holder has been advanced in line-spacing for one or two lines, as may be considered desirable, in order to clear the top bar of the frame and bring the stencil portion of the work-piece over the printing line on the platen, in that advance act the ribbon vibrating mechanism will have been automatically silenced, the types, therefore, will strike directly upon the stencil portion of the work-piece.

In accomplishing the results set forth, it is desirable that the shaft 9 be normally held, as by a spring 34, to retain the ribbon vibrating mechanism silenced, because the major portion of the work accomplished on the stencil sheet is without the use of ink ribbon, and therefore the spring 34 will hold said shaft 9 and the finger key 35 at neutral position, the finger key 35 representing the rocking movement of the rock shaft 9 in one direction to cause the ribbon to 'vibrate to and from the printing point.

To maintain the shaft 9 in the neutral position relatively to the ribbon-vibrating mechanism, I provide a pivotal arm 36 having a cam surface 37 in engagement with a pin 38 extending from the finger-key 35, the spring 3-1 urging said arm in the direction of said pinover the cam surface 37, which, being at an upward inclination, causes the pin to become seated by said spring in a hooked portion 40 at the top of said cam, thereby holding the shaft 9 and finger keys 35 at neutral. When it is desired to cause the ribbon-vibrating mechanism to operate, then either the key 35 may be depressed against the spring 34 to thereby rock the shaft 9, or said shaft may be rocked automatically by the card holder in the manner to be now described: Located beneath one of the racks 29, here shown as the right-hand rack. is an arm or cam 41 mounted on a rock shaft 42 journaled in bearings 48 supported by the platen frame below the platen, said arm or cam lying in the downward path of travel of the said rack 29 to be engaged by the end of said rack near the limit of its downward travel, and to rock through the final portion of the downward travel of the rack, a bar 44 of suitable length extending from said rock shaft 42 to rock therewith and actuate the ribbon-vibrating mechanism. Also mounted upon the rock shaft 42 is a guide for the rack 29 to receive the lower end of said rack as it approaches the arm or cam 41, and to direct the end of said rack into operative contact with said arm or cam. Said guide, which may consist of a bar 45 with shaft-engaging lugs 46, serves at its rear portion as a stop for the arm or cam 41, which is pressed thereto in the normal position by a spring 47 operating upon the rock shaft 42. The arm or cam 41 is arranged so that when the holder carrying a work-piece is moved downwardly across the platen surface, the rack 29 will strike said cam or arm 41, when the upper portion of the work-piece, as the top bar of the stencil frame, enters the printing zone, and by the continued downward movement of the rack to its lower limit, said arm or cam is carried downwardly and held depressed, and the upper portion of the top bar of the work-piece frame is presented to the action of the types. Obviously, upon retracting the holder in its line-spacing direction, the rack 29 will leave the arm or cam 41 at the same point in its travel where it had first made descending contact therewith, whereupon the spring 47 will retract said arm or cam and said bar 44.

The parts above referred to, being located upon the carriage, are intended to cooperate with other parts upon the machine frame for the automatic operation of the ribbonvibrating mechanism.

Mounted upon the machine frame, as by pivots 48, is a bell-crank lever having arms 49, 52, the arm 49 extending laterally and forwardly of the machine and having a wrist 51 lying in the path of movement of the bar 44, the other arm of said lever extending forwardly and terminating in a finger 53 in engagement with a tooth or projection 54 upon the rock shaft 9, to be capable, in the movement of said bell-crank lever of rocking said shaft 9 from its normal neutral position to a' position where the ribbon-vibrating mechanism, through the intermediate connections aforesaid, becomes operative with the action of the finger keys.

As will be gathered from the foregoing description of parts and their arrangement, the machine is normally operative with the ribbon vibrating mechanism silenced, the shaft 9 therefor with tooth 54 and fingerkey 35 being held rocked in the neutral position by means of the spring 34, the rack 29 being out of engagement, with the cam 41 for the writing to be performed with bare type upon the stencil sheet. But when the work-piece holder has been carried downwardly a sufiicient distance to resent the top bar of its frame for ink wrlting thereon, through the action of gears 30 upon racks 29, then one of said racks will have engaged the cam 41 and rocked it with the bar 44, so that said bar in any letter-feeding position of the carriage within the width of the work-piece, Wlll engage with the wrist 51 in the rocking action communicated to said bar in the manner aforesaid, to shift said wrist 51 and arm 49 rearwardly upon the bell-crank pivot, whereby the other arm 52 of the bellcrank is shifted to press its finger 53 against the tooth -54 to thereby rock the rod 9 out of neutral position, and into the position against the tension of the spring 34, where the link 13 shifts the actuator 14 to engage with the wrist 20, whereby in the well-known manner, the ribbon vibrating mechanism is rendered operative.

The work-piece is adapted to receive writing thereon in ink (as on the top bar of the stencil frame) during the continuation of the contacting relation between the rack 29 and cam 41, and this arrangement may cover the operation for an extent of vertical movement of said rack equal to one, two, or more lines of writing accordin to the length of the rack 29 or the re ative arrangement between said rack and cam, it being apparent that as soonas the rack 29 leaves its engaging contact with the cam in retiring therefrom with the further linespacing movement of the platen and holder, said cam and bar 44 will be restored to normal position by the spring 47 whereupon the ribbon vibrating mechanism will be silenced in the manner described, and further writing may proceed without the intervention of the inked ribbon.

As the introduction of the work-piece is accomplished by movin the racks 29 downwardly to the limit al owed their pins 31 in the slots 32, which allows for the cam engagement by the rack 29 referred to, so the upward or line-spacing movement of the holder is limited by the travel of the pins 31 to the upper termination of said slots 32, and the operator, therefore, in inserting a work-piece and in writing thereon to the full extent available, is guarded from overthrow in either direction, and further, is not required to pay attention tothe means for silencing and restoring the ribbon vibrator, because these means are actuated automatically in the operation of the ribbon mechanism.

While the extent of writin space in line -v spacing direction is set accor ing to the construction of the apparatus, work-pieces of different widths may be employed to vary their capacity in letter-feeding direction, for which purpose, the width of the work piece holder may be altered by spacing the fingers 27 variable distances apart upon their supporting bar 28; said fingers 27 belng adjustably secured to said bar for such purpose as by set screws 55. The typebars 56 have heels 57 to engage the universal bar 58 on frame 26, to shift said frame rearwardly, for return by spring 59, and to thereby cause the vertical reciprocations of the ribbon vibrator 25.

The platen frame is capable of shifting to upper case position in which the ribbon vibrating mechanism is equally controlled as when in normal or lower case position, the shift means comprising a platen-supporting rail .60 on the machine frame, the swinging brackets 61 carrying said rail, and shift keys, as 62, with lever extensions 63 to actuate said brackets 61 in shifting the rail.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a workpiece holder movable to carry a work-piece across the printing portion of the platen, and means operable with said work-piece holder in its adjustment for the preliminary lines of writing to bring said ribbon vibrating mechanism into operative position.

2. In a typewriting machine having a platen and rlbbon vibrating mechanism, the combination of a work-piece holder movable to carry a work-piece across the printing portion of the platen, and means actuated by said work-piece holder in its advance in line-spacing direction to silence said ribbon vibrating mechanism.

3. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder movable to carry a work-piece across the printing portion of the platen, and means actuated by the movement of said work-piece holder in line-spacing direction after a preliminary advance, to silence said ribbon vibrating mechanism.

4. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder mounted to carry a workpiece across the printing portion of the platen, and means operable with said work-piece holder in its adjustment for the preliminar lines of writing, to render said ribbon vi rating mechanism operative, and to silence said ribbon vibrating mechanism during the remainder of the line-spacing movement of said holder.

5. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder movable through a limited range to carry a workpiece across the printing portion of the platen, and means operated by said Workpiece holder in its line-space adjustment for the preliminary Writing to bring said ribbon vibrating mechanism into operative position, and to silence said ribbon vibrating mechanism for the further line-spacing movement of said holder.

6. In a typewriting machine for writing on stencils having a platen and ribbon vibrating mechanism, the combination of a work-piece holder movable to carry a workpiece across the printing portion of the platen, and means operable with said Workpiece holder in its adjustment for writing on the upper bar of the stencil frame to render said ribbon vibrating mechanism operative that the writing may be in ink, said ribbon vibrating mechanism becoming i11- operative when the work-piece holder has been advanced in line-spacing direction, to bring the stencil portion of the work-piece into printing position to be struck directly by the types.

7. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder movable to carry a work-piece across the printing ortion of the platen, means normally holding said vibrating mechanism in neutral or inoperative position, and means controlled by said work-piece holder in its linespace adjustment for preliminary writing to render said vibrating mechanism operative, and to subsequently restore said vibrating mechanism to its neutral or inoperative position.

8. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder movable to carry a work-piece across the printing portion of the platen, means normally holding said vibrating mechanism silenced, and means operable with said work-piece holder in its line-space adjustment for the preliminary writing to render said vibrating mechanism operative.

9. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism, the combination of a workpiece holder, means communicating the movement of the platen to said Work-piece holder to carry a work-piece across the printing portion of the platen, and means arranged to operate with said Work-piece holder in its advance in line-spacing direction to silence said ribbon vibrating mechanism.

10. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism, the combination of a workpiece holder, means communicating the movement of the platen to said workpiece holder, and means operat d by said workpiece holder in its line-space adjustment for preliminary writing to render said ribbon vibrating mechanism operative, and to silence said ribbon vibrating mechanism during the remainder of the movement of the holder.

11. In a typewriting machine having a revoln'ble platen and ribbon vibrating mechanism, the combination of a workpiece holder movable through a limited range to carry a Work-piece across the printing portion of the platen, means communicating the movement of the platen to said holder, and means arranged to operate with said work-piece holder in its line-space adjustment for the preliminary writing to render said ribbon vibrating ntrechanism. op erative, and to silence said ribbon vibrating mechanism in the subsequent line-spacing movement of said holder.

12. In a typewriting machine having a platen and ribbon vibrating mechanism, the combination of a work-piece holder, a spring to hold the ribbon vibrating mechanism normally inoperative, and means operated by said work-piece holder in inserting a Work-piece for and during preliminary Writing thereon, to overcome said spring and render said vibrating mecha nism o erative.

13. n a typewriting machine for writing on stencils having a revoluble platen and ribbon vibrating mechanism, the combination of a spring to hold said ribbon vibrating mechanism normally silent, a work-piece holder, means communicating the movement of the platen to carry said holder across the printing portion of the platen, and means operated by said Workpiece holder to render said vibrating mech- 'anism operative at the insertion of a workpiece and during its advance in line-spacing direction for writing upon the upper frame portion of the stencil. the vibrating mechanism again becoming silent in the continued advance of the work-piece holder for writing upon the stencil portion of the workpiece.

14. In a typewriting machine having a platen and ribbon vibrating mechanism, means normally holding said vibrating mechanism inoperative, a Work-piece holderadapted to reciprocate in the Work-piece inserting and advancing movements of the platen, and a bell crank adapted to move said vibrating mechanism into operative position, said bell crank being controlled by the movement of said work-piece holder in inserting the work-piece and during the preliminary Writing thereon.

15. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism, means normally holding said ribbon vibrating mechanism inoperative, a workpiece holder, means communicating the movement of the platen to said Workpiece holder to reciprocate the latter in inserting and advancing a work-piece over the printing portion of the platen, a bell crank adapted to move said ribbon vibrating mechanism into operative position, a rock shaft having a bar engaging said bell crank, and a cam upon said rock shaft in the path of said work-piece holder to actuate the bell crank through said bar in the movement of said work-piece holder while inserting a work-piece and during preliminary writing thereon.

16. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism, means normally holding said ribbon vibrating mechanism inoperative, a workpiece holder, means communicating the movement of the platen to said work-piece holder to reciprocate the latter in inserting and advancing a work-piece over the print ing portion of the platen, a bell crank adapted to move said vibrating mechanism into operative position, a rock shaft having a bar engaging said bell crank, and a cam upon said rock shaft in the path of said workpiece holder to actuate the bell crank through said bar in the movement of said work-piece holder While inserting a Workpiece and'during preliminary Writing thereon, the vibrating mechanism becoming silent in the continued advance of the Work-piece holder after the preliminary writing.

17. In a typewriting machine having a revoluble platen, the combination of a Workpiece holder movable back and forth with the platen, ribbon vibrating mechanism, a controlling rock shaft for said mechanism, means normally .holding said shaft rocked in one direction with the mechanism inoperative, means for rocking said shaft oppositely to render said mechanism operative, said shaft-rocking means including a tooth on said shaft, and a bell crank, one arm of said bell crank engaging said tooth while its other arm is engaged by said work-piece holder during the initial portion only of the platen advance in line-spacin direction for preliminary writing upon sai work-piece.

18. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism, the combination of a controlling rock shaft for said mechanism, a tensional device to hold said shaft rocked in one direction whereby said vibrating mechanism is normally silent, a work-piece holder adapted to reciprocate across the printing portion of the platen, a bell crank lever having one arm in engagement with said rock shaft. and connections between said work-piece holder and the other arm of said lever to operate said vibrating mechanism during a portion of the movement of said work-piece holder.

19. In a typewriting machine, the combination with a revoluble platen having a frame, of a work-piece holder mounted upon said platen frame, means connected to said platen and said work-piece holder for reciprocating the latter as the platen is rotated forwardly and backwardly, ribbon vibrating mechanism, means holding said mechanism normally silent, and means arranged to operate with said holder to render said vibrating mechanism operative during the initial portion only of the forward movement of said work-piece holder.

20. The combination with a revoluble platen and platen frame, of gears on the ends of the platen, racks meshing with said gears, a work-piece holder caused by said racks to move up and down, a normally inoperative ribbon vibrating mechanism, a rock shaft having means to control said mechanism, and a cam on said rock shaft in the path of one of said racks to be actuated thereby and cause the rock shaft to render said vibrating mechanism operative while said rack and cam are engaged.

21. The combination with a revoluble platen and a platen frame, of gears on the ends of the platen, racks meshing with said gears, a Work-piece holder caused by said racks to move up and down, means upon the platen frame to guide said work-piece holder, a normally inoperative ribbon vibrating mechanism, a rock shaft having means to control said mechanism, and a cam on said rock shaft in the path of one of said racks to be actuated thereby and cause the rock shaft to render said vibrating mechanism operative While said rack and cam are engaged.

22. The combination with a platen moving in one direction, of a device to hold a work-piece against the platen and moving in another direction, ribbon vibrating mechanism, means holding said mechanism normally inoperative, and means arranged to operate with said device during a portion of its movement to render said mechanism operative.

23. The combination with a revoluble platen, of a work-piece holder mounted for movement about tangentially of the platen, ribbon vibrating mechanism, means normally' holding said mechanism inoperative, and means controlled by the work-piece holder in a portion of its movement to render said vibrating mechanism operative.

'Z-l. In a typewriting machine having a revoluble platen and ribbon vibrating mechanism. the combination of a work-piece holder. means connecting said work-piece holder with the platen to reciprocate with the back and forth movements thereof for the respective insertion and line-spacing of a work-piece, and mechanism between said work-piece holder and ribbon vibrating mechanism whereby the latter is alternately rendered operative and inoperative automaticallv in the movements of said workpiece holder.

2.). In a typewriting machine having a carriage with a revoluble platen and ribbon vibrating mechanism, means normally holding said vibrating mechanism inoperative, a workpiece holder on the carriage, a. bell crank mounted upon the machine frame and having an arm to actuate the ribbon vibrating mechanism, said bell crank having an other arm to be actuated by said work-piece holder, and a swinging bar between said workpiece holder and bell ,crank arm to ctmnminicatc the movement of said holder to said bell crank in various positions of the carriage, whereby the vibrating mechanism may become operative at any desired letterspace position upon the work-piece.

26. In a typewriting machine having a carriage with a revolubl platen and ribbon vibrating mechanism, the combination of means normally holding said vibrating mechanism inoperative, a work-piece holder adapted to reciprocate in the work-piece inserting and advancing movements of the platen, a bell crank mounted upon the machine frame having one arm adapted to move said vibrating mechanism into operative position, and another arm having a wrist, a rock shaft mounted on the carriage and having a bar of length equal to the length of the work-piece, said bar engaging said wrist and adapted to move said bell crank to operate the ribbon vibrating mech' anism in any position of the carriage, said rock shaft having a cam in the path of said work-piece holder to be actuated thereby near the end of its work-piece inserting movement.

27. In a typewriting machine having a carriage with a platen and ribbon vibrating mechanism, means normally holding said vibrating mechanism inoperative, a Work-piece holder having rack bars meshing with gears at the platen ends to be thereby reciprocated in moving a work-piece back and forth over the printing surface of the platen, a bellcrank having one arm adapted to engage the ribbon vibrating mechanism to move it into operative position, and means upon the carriage for ei'igaging its other arm to actuate said bell crank. said means comprising a swinging bar whose path includes an engaging portion of said bell crank arm, a rock shaft carrying said bar, a cam upon said rock shaft in the path of one of said rack bars. and a guide upon said rock shaft to rccehe and direct the end of said rack bar against said cam to actuate the latter during the last portion of the work-piece in serting movement.

28. In a typewriting machine having a carriage, a revoluble platen thereon and ribbon vibrating mechanism, the combination of means upon the machine frame holding said mechanism normally inoperative, a workpiece holder, a connection between said holder and the platen, whereby said holder is moved back and forth with the platen, a bell crank upon the machine frame in engagement with said vibrating mecha-. nism, and a swinging bar on the carriage controlled by said work-piece holder during a portion only of the movement of the lat ter, to cause said bell crank to move said ribbon mechanism into vibrating position.

29. In a typewriti'ng machine having a carriage, a revoluble platen thereon and ribbon vibrating mechanism, the combination of means upon the machine frame holding said mechanism normally inoperative, a workpiece holder, a rack thereon in mesh with a gear on the platen, whereby said holder is moved back and forth with the platen, a bell crank upon the machine frame in engagement with said vibrating mechanism, and a swinging bar on the carriage controlled by said rack during a portion of the movement of said workpiece holder, to cause said bell crank to move said ribbon mechanism into vibrating position.

30. In a typewriting machine having a carriage, a revolublc platen thereon, a gear on said platen and ribbon vibrating mechanism, the combination of means upon the machine frame holding said mechanism normally inoperative, a work-piece holder, a rack thereon in mesh with said gear, Where by said holder is moved back and forth with the platen, a guide for said rack, a bell crank upon the machine frame in engagement with said vibrating mechanism, and a swinging bar on the carriage controlled by' said rack during a portion only of the movement of said work-piece holder, to cause said bell crank to move said ribbon mechanism into vibrating position.

31. In a typcwriting machine having a carriage, a revoluble platen thereon, the combination of ribbon vibrating mechanism having a universal bar, and means holding said mechanism normally inoperative, a work-piece holder movable back and forth with the platen. means arranged to operate with said workpiece holder during a portion of its movement to render said vibrating mechanism operative. and a type-bar having means for vibrating said mechanism when in its operative condition.

32. In a typewriting machine having a carriage, a revoluble platen thereon, and means for shifting said platen to upper case position, the combination of ribbon vibrating mechanism operative in both normal and shifted positions of the platen, means holding said mechanism normally inoperative, a work-piece holder movable back and forth with the platen, and means arranged to operate With said work-piece holder during a portion only of its movement to render said vibrating mechanism operative.

33. In a typewriting machine having a carriage, a revoluble platen thereon and ribbon vibrating mechanism, the combination of means holding said mechanism normally inoperative, a workiece holder adjustable to support Work-pieces of variable widths, a connection between said holder and the platen, whereby said holder is moved back and forth with the platen, a bell crank upon the machine frame in engage ment with said vibrating mechanism, and a swinging bar on the carriage coextensive with the work-piece carried by said holder, said swinging bar controlled by said workpiece holder during a portion only of the movement of the latter, to cause said bell crank to move said ribbon mechanism into vibrating position.

34. In a typewriting machine, the combination with t pe keys, a line-spacing platen and a contro lable ribbonvibrating mechanisln, said ribbon-vibrating mechanism operable by said keys, of means dependent upon the movement of the platen in linespacing direction for controlling the function of said ribbon-vibrating mechanism at the operation of said keys.

35. In a typewriting machine, the combination with a revoluble platen and a normally silenced ribbon-vibrating mechanism, of means dependent upon the rotation of the platen for putting the ribbon-vibrating mechanism into eiiective condition.

36. In a typew'riting machine, the combination with a revoluble platen and a normally silenced ribbon-vibrating mechanism, of means dependent upon the rotation of the platen for putting the ribbon-vibrating mechanism into effective condition, and for subsequently returning the ribbon-vibrating mechanism to silenced condition.

ALFRED G. F. KUROWSKI.

Witnesses W. O. VVEs'rrHAL, Trrus H. IRONS.

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