US1062681A - Type-writing machine. - Google Patents

Description

P. A. YOUNG.

TYPE WRITING- MACHINE.

APPLICATION FILED SEPT. 24, 1910.

Patented May 27, 1913.

2 SHEETSSHEET 1 F. A. YOUNG.

TYPE WRITING MACHINE.

APPLICATION FILED SEPT.24, 1910.

Patented May 27, 1913.

2 SHEETS-SHEET 2.

INVENTOR:

ATTQR UNITED STATES PATENT OFFICE.

FRANK A. YOUNG, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPEVVRITER COMPANY, OF NEW YORK, N. 'Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

To all whom it may concern Be it known that I, FRANK A. YOUNG, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type-VVriting Machines, of which the following is a specification.

The present invention relates to that class of typewriting machines in which the carriage spring is connected to the ribbon winding or feeding mechanism to actuate the same during the step by step or letter feed movement of the carriage.

The invention comprises improvements upon the devices disclosed in my pending application No. 569,510, filed June 29, 1910.

In the present invention,,one of the features is a novel and simple means whereby when the carriage is disengaged from the escapement mechanism, the ribbon feeder is disconnected from the carriage spring. A positive connection is provided between the carriage-release member and the gear train of the ribbon feeder, to break the gear train of said application whenever the carriage is released from the escapement mechanism. Preferably one of the gears of the ribbondriving train is mounted on a lever which has a bearin against the releasable carriage rack; this lever following the movements of the carriage rack when the latter engages and disengages the escapement mechanism. Thus the lever, by shifting the gear thereon, makes and breaks the gear train of the ribbon feeder.

Other objects and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a perspective view from the front, of so much of the typewriter mechanism as relates to the present invention. Fig. 2 is a detail perspective view of certain of the gearing at the power drum, for feeding the ribbon. Fig. 3 is a view in front elevation of the carriage, and ribbon feeding gearing at the power drum, when the rack is in engagement with the escapement mechanism. Fig. at is a view of the parts shown in Fig. 3, when the rack is disengaged from the escapement mechanism. Fig. 5 is a perspective rear view of the ribbon-vibrating mechanism and associated parts, said mechanism being shown as ineffective at the type strokes, the type being in printing position Specification of Letters Patent.

Application filedseptember 24, 1910.

Patented May 27, 1913. Serial No. 583,550.

above the ribbon. Fig. 6 is a sectional rear elevation, showing one color 'key depressed. Fig. 7 is a similar view showing the other color key depressed. Fig. 8 is a sectional side elevation of the ribbon actuator and the connected lever and ribbon-vibrator; the parts shown in normal positions.

The invention, as shown in the drawings, is applied to the well known Underwood typewriter. The main frame 1 of the machine is shown in part only. A portion of the carriage frame is indicated at 2. The carriage, with the platen (not shown), is mounted in the usual manner to have longitudinal movement 011 the main frame. The escapement rack 3, attached to the carriage, controls the feed thereof in the usual manner. The rack is supported at either end on arms 8, pivoted at 9 to the carriage, so that it may be lifted out of engagement with pinion 4 of the escapement mechanism, at the end of each line of printing or whenever desired, as for instance in tabulating work, to permit free movement of the carriage. The carriage is attached by a strap 5 to spring drum, indicated at 5, to be driven by the latter, under the control of the escapement mechanism when the rack is in Fig. 3 position, and free of the escapement mechanism when the rack is in Fig. 4 position.

The release key 6 is carried by lever 7, in tegral with one of the arms 8 which supports the rack 3, and rocks with the latter around the pivot 9 when the release key is operated. The operation of the release key lifts the rack 3 in the usual manner from Fig. 3 position to Fig. 4 position. The tabulator key lever 10 is shown as pivoted at 11 to the frame 1. It is connected by a link '12 to tabulator stop-frame 13 which is mounted to be rocked on shaft 145, pivoted in frame 1. The tabulator stops 15, as usual, are adjustable longitudinally of the shaft 1 1 and have teeth 16 to engage a rack 17 forming a part of the frame 13, whereby the stops are held in any position to which they may be adjusted on the shaft 14. Vdhen properly set, the stops are adapted upon operation of the tabulator key to be swung forward with the frame 13, into the path of a suitable stop (not shown) on the carriage, so as to arrest the carriage.

The link 12 which is connected to the tabulator key lever 10 is also pivotally connected to a bracket or arm 19 on a bar 20 positioned on the rocking frame 13 forward of and below the shaft 14. lVhen, therefore, the tabulator key is depressed, the frame is rocked in such a direction as to move the rack 17 with the tabulator stops 15 toward the carriage. At the time the tabulator key is operated, the carriage is released from the escapement mechanism so that it may be jumped or tllIOWll by the drum spring to the next column position to be arrested by the appropriate stop 15. To release the carriage rack from the escapement mechanism, the bar 20 carries a common form of device comprising an arm 21 engaging a lever 22 pivoted at 23 to the frame 1. The lever 22 at its forward end takes the form of a pin upon which is loosely mounted a roller 25. hen the operation of the tabulator key causes the bar 20 with the arm 21 to be depressed, the lever 22 is rocked on its pivot 23 to lift the roller 25, and the roller 25 when so lifted engages the under side of the rack 3 and lifts the same out of engagement with the escapement pinion 4.

It is desirable that whenever the carriage is released from the escapement mechanism, whether by the release key 6, or by the tabulator key, that the ribbon feeding mechanism be silenced, that is to say, that the feed of the ribbon from one spool to the other, be discontinued. In the present invention, the ribbon feed is effected by the drum spring which drives the carriage, so that as the carriage moves step by step, the ribbon feeds from one spool to the other. One of the spools 26 is shown in Fig. 1 mounted on vertical shaft 27. Each spool shaft 27 carries at its lower extremity a pinion 28. Fast to the shaft 30 ator near each end of the shaft is a bevel gear 29 (only the right hand one being shown in the drawings). Each gear 29 is adapted to be meshed with one of the spool shaft gears 28, according to the position of the shaft 30. The shaft 30, part only of which is shown in the drawings, is mounted at either end in a bracket 31 in the frame 1 of the machine, and extends longitudinally of the machine. It is adapted to be shifted longitudinally to bring one or the other of the bevel gears 29 into engagement with its respective spool shaft gear 28, according to the direction of feed of the ribbon. The dis tance between the gears 29 is insufficient to permit both at the same time to engage each its gear 28.

Mounted on the shaft 30, is a gear 32 by means of which the shaft is driven. Meshing with the gear 32 is a worm 33 on a shaft 34 which extends from front to rear of the machine frame, perpendicularly to the shaft 30. The gear 32 is of barrel or elongated shape to permit of the longitudinal shift of the shaft 30 without disengagement of the gear 32 from the worm 33. Loosely mounted on the rear end of the shaft 34 is a pin ion 35. Fast to the pinion 35 is a disk 35 carrying a spring pawl 37. Fast to the shaft 34 is a sleeve 38 on one end of which is a ratchet wheel 39 adapted to be engaged by the pawl 37, whereby rotation of the pinion 35 in one direction causes the shaft 34 to be rotated. The rear end of the shaft 34 is supported in a bracket or arm 40 on the frame of the machine near the spring drum 5'.

Fast to the spring drum, to turn with the latter, is a gear 41. Drum 5 and the gear 41 are mounted to revolve on a hub or aXle 42 having bearing in the frame of the machine. On the hub 42 is a sleeve 43 carrying a lever arm 44, in which is mounted a pinion 45 which meshes with the gear or pinion 41. In normal position of the lever arm 44, the pinion 45 intermeshes not only with the gear 41 but also with the pinion 35 so that the movement of gear 41 is transmitted through pinion 45 to pinion 35. In this position of the lever arm 44, it bears against a stop 46. A spring 47 holds the lever arm 44 against stop 46, and thus holds the gear 45 in mesh with the gear 35. The sleeve 43 has another arm 48 which extends to the right and then up behind the escapement rack 3, and carries on its end a roller 49 which is held down upon the top of the escapement rack by the spring 47. WVhen the escapement rack is lifted by either the release key or the tabulator key, the roller 49 and the arm 48 are lifted by the rack, causing the lever arm 44 to be raised so as to remove the gear 45 from the gear 35, and thus break the connection between gear 41 and pinion 35. The carriage and spring drum then move without transmitting motion to shaft 34. Because of the pawl and ratchet connection of the pinion 35 to theshaft 34, the gear 41 may feed backward with the pinion 35 without corresponding back motion of the shaft 34. A gravity controlled pawl 50 engages a ratchet 51 on the forward end of the sleeve 38, to hold the shaft 34 against backward movement or displacement.

hen the machine is used for stenciling purposes, the ribbon is not vibrated to the printing point at the type strokes; and, not being used, it is desirable that there be no feed of the ribbon from one spool to the other at such times. To discontinue the feed of the ribbon, the worm 33 on the shaft 34 is disengaged from the barrel gear 32, on the shaft 30, by a bodily lift of the shaft 34; To this end, the forward end of the shaft 34 is mounted in an arm 52 of a lever pivoted to the frame at 53. The other arm 54 of this lever has at its end a cam surface 55 adapted to be engaged and depressed, with the arm 54, by a pin 56 on a lever 57, when the latter is rocked to the left on its pivot 58. The lever 57 is a lever which is operated to silence the ribbon to prevent vibration of the same to the printing point at the type strokes. The ribbon mechanism controlled by this lever 57 is illustrated in Figs. 5 to S. 7

Color fields 71 and 72 are united edge to edge, to form a single ribbon through which types 73 strike rearwardly against. a platen, not shown. The ribbon is threaded through a vibrator 7 1, which is operated by a lever 75, the latter pivoted at 7 6 upon a bracket 77 secured to a shift rail 78 of the case-shifting mechanism in said machine. A universal bar 79, vibrated by the type bars, is fixed upon a frame 80. Carried upon said frame 80 is an actuator 81 having one vertical slot 82 to engage a wrist 83 on the lever 75, and an opposite vertical slot. 8% to engage a wrist 85 provided upon said lever 75 nearer to the fulcrum 7 6 of the lever. Said slots are formed in ears bent forwardly from the body of the actuator, and the latter is adjustable to bring either slot into engagement with its associated wrist, such adjustment being effected by a link 87 pivoted at 88 to the actuator, and the latter being held by a screw 89 upon a bracket 90 fixed upon said universal bar frame 80; a vertical wall of said bracket having a horizontal slot 91 through which said screw extends, the slot permitting the required adjustment of the actuator.

When the slot 82 is in engagement with the wrist 83, the lever 75 is given a short stroke, and the upper field or color band 71 is caused to cover the printing point at the type strokes. When, however, the actuator is shifted to bring the slot 8t into engage ment with the wrist. 85, the lever 75 is given a greater stroke at the type strokes, and hence the lower color band or field 72 is caused to cover the printing point at the type strokes. For effecting this adjustment of the actuator, the link 87 is connected to an arm 92 fixed upon a rock shaft 62, the latter carrying at its forward end a crossarm 61 having keys 95, 96, corresponding to the color bands 71, 72; so that upon depression of either key, the corresponding color band is brought into use. A yielding detent 97 is caused to engage the beveled end of a pin 60 projecting rearwardly from the arm 61, to hold said arm in either the Fig. 6 or the Fig. 7 position, to cause either color band 72 or the color band 71 to cover the printing point at the type strokes; said detent 97 being incapable of holding the train 61, 62, 92, 87, 81 in a midway position.

The lever 57, above referred to, is connected by its pivot 58 to a bracket 99 forming part of or secured to the framework 1 of the machine. Between its ends the lever is provided with a transverse slot 59 whose open end terminates in opposite cams 105. 106, so constructed that when the lever is moved from the right from either Fig. 6 position or the Fig. 7 position, the projection 60 is engaged by one of said cams, and the key-bearing cross-lever 61 is brought to a horizontal position, as shown in Fig. 5; the entire train of devices from (31 to 81 thus being brought to a position midway between their extreme positions; and both wrists S3 and 85 being out of engagement with the slotted actuator, so that the latter, although reciprocating at the key strokes, has no effect upon the ribbon-vibrating lever 75, and hence the ribbon is silenced and the type strikes above the ribbon, as at Fig. 5.

The lever 57 is provided with a yielding detent or tooth 107 normally engaging a notch 108 formed in the bracket 99; but upon moving the lever over to effective Fig. 5 position, said detent engages a notch 109 in said bracket, whereby the described train of mechanism is mechanically held in ribbonsilencing position. The sides of the slot 59 are of such shape as to lock the key-bearing cross-lever 61 against movement while said lever is in the Fig. 5 position; the cams frrming together with the sides of said slot a pair of jaws for controlling the position of the described train of devices. At 5 the detent 97 is resting idly upon the tip of the projection 60. The lever 57 which is thus employed to silence the vibrations of the ribbon at the time of stenciling, is also conveniently used to silence the feed of the ribbon at the same time. As the lever 57 is thrown to the left to engage the pin 60, and

by centering the rock arm 61, to silence the vibrator, the pin 56 engages the cam surface 55 on the lever arm 54 and depresses the latter a m, thereby lifting the arm 52 with shaft 34:, and disengaging the worm 33 from the barrel gear 32. The bearing of the rear end of the shaft 34: in the bracket 40 is such as to permit of up and down movement of the forward end of the shaft. lVhen the lever 57 has been given its full throw to the left, the pin 56 rests upon a dwell (33 at the top of the cam surface 55 to hold the lever arm depressed until the lever 57 is again moved to the right. A spring 6 1- by engagement with the pin 65 on the lever arm 54, turns this lever to normal position as soon as lev 57 is moved to the right. The spring (34 has the further purpose of normally holding the worm 33 down in proper intermeshinc relation to the barrel gear 32.

The structure shown is capable of various modifications within the scope of the inventicn.

Said application claims broadly certain features disclosed herein. The present claims are limited to features not disclosed in said application.

Having thus described my invention, I claim:

1. In a typewriting machine, a carriage, a spring for driving the same, an escapement mechanism for controlling the feed of the carriage, means for releasing the carriage from the escapement mechanism, a gear driven by the carriage spring, a ribbon feeding mechanism adapted to be driven from said gear, a shiftable pinion for connecting and disconnecting the gear and the ribbon feed mechanism, and manipulable means shiftable independently of said pinion for silencing said ribbon-feeding mechanism.

2. In a typewriting machine, a carriage, a spring for driving the same, an escapement mechanism for controlling the feed of the carriage, means for releasing the carriage from the escapement mechanism, a gear driven by the carriage spring, a rib bon feeding mechanism, a pinion for driving the ribbon feed mechanism, means op erated from the carriage for connecting and disconnecting said pinion and carriage spring gear, and manipulable means shiftable independently of said pinion for silencing said ribbon-feeding mechanism.

3. In a typewriting machine, a carriage, a spring for driving the same, a rack on the carriage, and an escapement mechanism cooperating with the carriage rack to control the feed of the carriage, means for disengaging the rack from the escapement mechanism to permit.of forward throw of the carnage, a ribbon feed mechanism, a gear attached to and driven by the carriage spring, a pinion attached to the ribbon feed mechanism, for driving the same, means driven by the carriage rack as the latter moves to and from the escapement mechanism, for connecting and disconnecting said carriage spring gear and said pinion, and manipulable means shiftable independently of said pinion for silencing said ribbon-feeding mechanism.

4. In a typewriting machine, a carriage, a spring for driving the same, a rack on the carriage, and an escapement mechanism cooperating with the carriage rack to control the feed of the carriage, means for disengaging the rack from the escapement meclr anism to permit of forward throw of the carriage, a ribbon feed mechanism, a gear attached to and driven by the carriage spring, a pinion attached to the ribbon feed mechanism, for driving the same, a lever operated by the carriage rack as the latter moves to and from the escapement mechanism, a pinion carried by said lever into and out of a position in which it connects said carriage spring gear to said ribbon feed pinion, and manipulable means shiftable independently of said pinion for silencing said ribbon-feeding mechanism.

5. In a typewriting machine, a carriage, a spring for driving the same, a rack on the carriage, and an escapement mechanism cooperating with the carriage rack to control the feed of the carriage, means for disengaging the rack from the escapement mechanism to permit of forward throw of the carriage, a ribbon feed mechanism, a gear attached to and driven by the carriage spring, a pinion attached to the ribbon feed mechanism, for driving the same, a lever having resilient bearing against the carriage rack to be operated by the carriage rack as the latter moves to and from the escapement mechanism, and a pinion carried by said lever into and out of a posit-ion in which it connects said carriage spring gear to said ribbon feed pinion.

6. In a typewriting machine, a carriage, a spring for driving the same, a rack on the carriage. and an escapement mechanism cooperating with the carriage rack to control the feed of the carriage, means for disengaging the rack from the escapement mechanism to permit of forward throw of the carriage, a ribbon feed mechanism, a gear attached to and driven by the carriage spring, a pinion attached to the ribbon feed mechanism, for driving the same, a bell crank lever, one arm of which is connected to the carriage rack to be operated by the carriage rack as the latter moves to and from the escapement mechanism, nd a pinion carried by the other arm of said lever into and out of a position in which it connects said carriage spring gear to said ribbon feed pinion.

7. In a typewriting machine, a carriage, and a source of power for driving the same, an escapement mechanism for controlling the feed of the carriage, means for releasing the carriage from the escapement mechanism, a power driven ribbon feeder, and means for disconnecting the feeder from its source of power, said disconnecting means having resilient bearing on the carriage to be moved and operated by the movement of the carriage as the carriage disengages itself from the escapement mechanism.

8. In a typewriting machine, a carriage, a spring for driving the carriage, an escapement mechanism for controlling the feed of the carriage, a gear driven by said spring, a lever on the axle of said gear, a pinion carried by said lever permanently meshed with said gear, a ribbon feeding mechanism and a gear for driving the same, and means for moving said lever with the pinion thereon around its axis to move the pinion into and out of engagement with the gear which drives the ribbon feeder, so that as the carriage engages and disengages the escapement mechanism, the ribbon feeder may be connected to and disconnected from the carriage spring.

9. In a typewriting machine, a carriage, a spring for driving the carriage, an escapement mechanism for controlling the feed of the carriage, a gear driven by said spring, a lever on the axle of said gear engaging the carriage so as to be rocked when the carriage disengages and engages the escapement mechanism, a pinion permanently in mesh with said gear and carried by said lever so that when the lever is rocked the pinion moves along the gear, a ribbon feed ing mechanism, and a gear for driving the same, said last-named gear being engaged by said pinion in one position of said lever and being disengaged from said. pinion when the carriage moves to disengage the escapement mechanism.

10. In a typewriting machine, a carriage, a spring for driving the carriage, an escape ment mechanism for controlling the feed of the carriage, a gear driven by said spring, a lever on the axle of said gear having resilient bearing against the carriage so as to be rocked when the carriage disengages and engages the escapement mechanism, a pinion permanently in mesh with said gear and. carried by said lever so that when the lever is rocked the pinion moves along the gear, a ribbon feeding mechanism, and "a gear for driving the same, said last-named gear being engaged by said pinion in one posit-ion of said lever and being disengaged from said pinion when the carriage moves to disengage the escapement mechanism.

11. In a typewriting machine, a carriage, a spring for driving the carriage, an escapement mechanism for controlling the feed of the carriage, a gear driven by said spring, a lever on the axle of said gear having resilient bearing against the escapement rack of the carriage so as to be rocked when the carriage disengages and engages the escapement mechanism, a pinion permanently in mesh with said gear and carried by said lever so that when the lever is rocked the pinion moves along the gear, a ribbon feeding mechanism, and a gear for driving the same, said last-named gear being engaged by said pinion in one position of said lever and being disengaged from said pinion when the carriage moves to disengage the escapement mechanism.

12. In a ribbon movement, the combination with a carriage-driving spring and ribbon spools, of an interposed worm mounted on a shaft, a gear coacting with said worm, means to connect said gear with said spools alternately, means for moving said shaft transversely to its length to unmesh said worm from said gear, a releasing mechanism for said carriage, and means connected to said releasing mechanism for disconnecting said worm from said carriage driving spring.

13. In a ribbon movement, the combination with a carriage-driving spring and ribbon spools, of an interposed worm mounted on a shaft, a gear meshing with said worm, means to connect said gear with said spools alternately, a lever provided with a bearing for one end of said shaft to move the worm out of mesh with said gear, the other end tion with a carriage-driving spring and ribbon spools, of ribbon-feed reversing means, a worm and gear interposed between said spring and spools, said gear being endwise or axially shiftable at the operation of reversing the ribbon feed, and constructed to remain in mesh with said worm during such endwise shifting, means for separating the worm and gear, to silence the ribbon, a releasing mechanism for said carriage, and means connected to said releasing mechanism for disconnecting said worm from said carriage-driving spring.

15. In a typewriter ribbon movement, the combination with a carriage-driving spring and ribbon spools, of interposed gearing comprising a worm and gear, a ribbon-vibrator, a ribbon vibrator silencing fingerpiece, a connection from said finger-piece to said worm and gear to separate them, a releasing mechanism for said carriage, and means connected to said releasing mechanism for disconnecting said worm from said carriage-driving spring.

16. In a typewriter ribbon movement, the combination of a ribbon-vibrator-controlling finger-piece, a ribbon-spool driving gear, means connected to said finger-piece for silencing said gear, a carriage-driving spring, gearing between said carriage driving spring and said spool-driving gear, a carriage-releasing mechanism, and means connected to said carriage-releasing mechanism for disconnecting said spring from said spool-driving gear.

17 In a typewriter ribbon movement, the combination with a pair of ribbon spools, a carriage and a carriage-driving spring drum, of a gear connected with said drum, a pinion meshing with said gear, a worm, connections whereby said pinion drives said worm, a gear with which said worm meshes, connections between said worm-driven gear and both ribbon spools, means for moving said worm out of mesh with said wormdriven gear, to silence both spools, a carriage-releasing mechanism, and means con nected to said carriage releasing mechanism for effecting disconnection between said drum gear and said worm.

18. In a typewriter ribbon movement, the combination with a carriage-driving spring, of a worm connected therewith and mounted on a shaft, a gear meshing with said worm, ribbon spools driven by said gear, a ribbonthrow-controlling and silencing finger-piece, a lever for moving said worm-shaft transversely to its length to disconnect the work and gear, means concomitantly connecting" said lever to said finger-piece, a carriage-releasing mechanism, and means connected to said carriage-releasing mechanism for silencing said worm.

19. In a typewriter ribbon movement, the combination with a carriage-driving spring drum, of a shaft driven by said drum, a worm on said shaft, a gear with which said worm is normally in mesh, a lever provided with a bearing for said shaft, ribbon-spools driven from said gear, a ribbon-vibratorsilencing finger-piece, means whereby said finger-piece moves the lever to unmesh said worm and gear, a carriage-releasing mechanism, and means connected thereto for disconnecting said shaft from said drum.

20. In a typewriter ribbon movement, the combination with the carriage driving spring drum, and the ribbon spools, of a ing finger-piece, a connection from said finger-piece to said shaft-moving lever, a carriage releasing mechanism, and means connected to said carriage releasing mechanism for disconnecting said drum from said shaft.

FRANK A. YOUNG.

WVi -nesses K. FRANKFORT, C. RIPLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). C.

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