US1170988A - Type-writing machine. - Google Patents

Type-writing machine. Download PDF

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US1170988A
US1170988A US77546613A US1913775466A US1170988A US 1170988 A US1170988 A US 1170988A US 77546613 A US77546613 A US 77546613A US 1913775466 A US1913775466 A US 1913775466A US 1170988 A US1170988 A US 1170988A
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line
carriage
machine
bar
spacing
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US77546613A
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Alexandre Valere Nibourel
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Underwood Typewriter Co
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Underwood Typewriter Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/54Locking devices applied to printing mechanisms
    • B41J29/58Locking devices applied to printing mechanisms and automatically actuated
    • B41J29/68Locking devices applied to printing mechanisms and automatically actuated by completion of a page or predetermined number of lines or exhaustion of paper to lock the keyboard

Description

A. V. NIBOUREL.
TYPE WRITING MACHINE, APPLICATION FILED 111N524. I913.
1,170,988. Patented Feb. 8, 1916.
' INVIEN TOR:
MM??? ATTQMY.
UNITED STATES PATENT OFFICE.
ALEXANDRE VALERE NIBOUREL, OF PARIS, FRANCE, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE. 1
TYPE-WRITING MACHINE.
Specification of Letters Patent.
. Patented Feb. 8, 1916.
' To all whom it may concern:
have been written on the page, so that the writing will not accidentally be carriedbelow a desired margin limit at the bottom of the page. i
A feature of the invention is the provision of p/simple and practical mechanism which will operate to lock the type keys after a given number of lines has been written, and thereby positively prevent further writing until the device is reset.
The invention is herein shown as applied to anUnderwood typewriting machine. On the platenframe is a depressible bar having a cam in the path of the line-space lever, so that when the lever is operated the bar is depressed, to operate an escapement pawl 00- operating with a ratchet wheel. The latter carries an adjustable arm which, after a predetermined number of operations of the.
line-space lever, swings a universal locking bar into locking engagement with the key levers. Said arm is adjustable to corre spond with the number of lines to be written on the worlesheet f Other objects and advantages of the invention will appear hereinafter.
is a perspective View of a typewriting machine with my invention applied thereto. Fig. 2 is a sectional end elevation view of the same. Fig. 3 is a detail View :showing the escapement wheel and spring motor for operating same. Fig. 4 is a detail view of the cam-actuated bar.
Mounted on the frame 1 of the machine is a carria e comprising a platen frame having ends gaand 3 in which is journaled a a rotary platen l. The carriage is driven by a spring barrel 5 connected through a band 6 to the carriage. The line-space mechanism comprises a lever 7 pivoted at 8 to the platen 4 frame, and having an arm 9 to operate a slide bar. 10 on whichis pivoted a dog 11cooperating with a line-space wheel 12 secured to the platen axle. The slide 10 and lever 7 are returned by a spring 13. The us" spring'pressed detent 14c bears against the line-space wheel to hold the platen in operated position.
Extending along the front of the platen frame is a bar 15 supported and guided by shouldered screws 16 extending through diagonal slots 17 in the bar and threaded into the platen frame. The bar 15 is adapted to have a diagonal movement relatively to the platen frame in a vertical plane, and is normally held in its elevated position with the screws 16 at the bottom of the slots 17 by means of a,spring 18. The diagonal disposition of the slots 17 permits a comparatively'long spring 18 to be employed, as the latter may extend in an approximately horizontal direction, and also prevents tilting: of the bar abouteither screw 16 as a fulcrum, so that the bar always remains horizontal.
Secured to the machine frame 1 is a vertical plate 19 in which is journaled an escapement wheel 20 having rack teeth 21 formed on its periphery. -A coil spring 22 having its ends connected respectively to the hub 23 of the escapement wheel and the plate 19, forms a spring motor for rotating the escapement wheel in a counter-clockwise direction, as seen in Fig. 2. An escapement pawl or detent 21 pivoted at 25 to the plate 19, is formed with teeth 26, 27, which cooperate with the teeth 21. A verticallyslidable rod 28 rests on the detent 2t and at its upper end carries an anttfriction roller In the accompanying drawings, Figure 1 spring 18 and the spring 30 returns the escapement detent and rod28. The escape ment wheel 20 is thus advanced one stepin a counter-clockwise direction.
Secured to the escapement Wheel 20 b means of screws 32 is a disk or dial 33 provided with an annular series of seats or openings 3-!- equallyspaced and preferably equal in number to, or the same angular distance apart as, the teeth 21 on the escapement wheel. An arm pivoted concentrically with the dial and rotatable independently thereof carries a set pin 36 adapted to enteany one oi the openings 34- and thereby lock the arm to the disk in any desired position of adjustment. A handle 37 on the arm 35 has its path of movement interceptet'l by an arm 38 on a rock shaft 39 on the machine frame. Thus said handle 37 with said arm 35 comprises an actuator to engage the arm 38, to rock the shaft 39 with the ctmtinued movement of wheel 20, thereby causing the arm it? to actuate the universal locking bar all. 1'1 locking device for the type ke comprises a swinging lrame having upright arms 4-0 connected by a horizontal bar t l extending over the key levers 4-2 and adapted to be swung beneath locking lugs t-l :tormed on the key levers, the rod ll thus forming a universal locking bar tor the type keys 42-. The locking bar is nornmlly held in releasing: position by a spring 42st. An arm 15, extending rearwardly from the locking frame, has an otlset 46 in the path of an arm 47 on the rock shaft 39. The forward and rearward rotation of the rock shaft- 39 are limited by stationary stop pins 48 and 49 respectively in the path of a pin 50 and the arm 33. The disk 33 has a stop 51 which determines the initial position of the indicating device by engaging the pivot pin 25.
in. operation, the arm 35 is adjusted on the dial to a position corresponding to the number of lines it is desired shall be writ ten on a worlesl'ieet. it acilitatetil by a, scale An opening 53 in the scale markings This adjustment is or series of numbers the arm 35 permits or ru-nnlxars to be seen through said arm and thus accurately in di-- cates the position of adjustment.- 'lhus the arm 35 with its opening 53 exposing the n. mbers ot the scale numerals, t'orins an indicator, when set by the pin 36, to show the number ot lines that can be written upon the page before the key levers will become locked. llv means of said indicator the op erator can always ascertain the number of lines remaining unwritten within the predetermined number of lines for which the mechanism. is set. by noting the number of openings 34 between the indicator 35 and the point upon disk 33 adjacent the rock arm that number representing the numher oi line-s )acing operations still to be med before the key levers will be engag d by the lock. For example, in Fig. 2 the-scale number 30 appears through the opening 53, the arm being set to provide for thirty lines being written before the type keys are locked. When or before a. worksheet inserted in the machine the handle tieth 37 is rotated, carrying with it the dial, to the starting position indicated in Fig. 3, with the stop 51 in contact with the pivot pin Each time the line-space lever 7 is operated to rotate the platen and advance the worksheet, the bar 15 is depressed and operates through the rod 28 and eseapement mechanism to advance the disk 33 one step in a counter-clockwise direction. The disk is thus moved step by step during the print ing of a sheet, and when the line-space lever has been operated tor the last line (the thirwith the mechanism adjusted as shown) the arm or actuator 35 is brought into contact with the arm 38. and an additional operation ot' the line-space lever will, through the train oi connections shown. rotate the rock shaft 35) and move the locking bar 41 forward beneath the. stops 4-3, and thereby lock the type keys so that further writing is prevented until the indicator has been reset. The operator is thus prevented from accidentally writing beyond the predetermined bottom margin.
In a broad con'iprehension of this invention, it will be seen to comprise the provision, upon the frame ot a typewritinfz machine, ot a. machine element under the control of the line-spacing lever, to be acted upon through the medium of an interme diary train between the line-spacing lever and such machine element. In the present example of this ii'lvention, the machine element in question is shown as a rock shaft 39 with arms 38, 47 to connnunicate motion to a key-locking mechanism; and the intermediary mechanism includes that part on the machine frame which consists of the spring-pressed actuator. here broadly termed a movable or revoluble device, its controlling mechanism, and spririg-returned operating rod or bar 28. said bar receiving its intermittent in'ipulses from the intermediary train part or bar 15 upon the carriage.
r'tlthough the present invention is shown as adapted to an Underwood typewritinp machine. it will be understood that the pri-n ciplcs oi my invention are applicable to va rious other types of machines.
Various modifications in the details of construction and arrangement o't' parts might also be made without departing from the spirit and scope of my invention.
Having thus described my invention. lclaim I 1. In a typewriting machine, the combi nation of an escapement wheel, an operating motor therefor, permit a stepby-step movement of the wheel, line-space n'lecl'ianism controlling said escapement device, and indicating means carried by the wheel.
in a t-vpewriting machine, the combination of an escapement wheel. a spring to rotate the wheel an eseapement pawl conan escapement device to frame, a line-space lever, means. operatedthereby to depress the bar, an escapement wheel, a cooperating pawl, means operated by the depression of said bar to actuate said pawl, and a page-end indicator carried by I "said wheel.
thereby to depress the bar, an escapement wheel, a cooperating pawl, means operated by the depression of said bar to actuate said pawl, type keys, a universal bar to lock said keys, and operating connections between said wheel and said universal bar.
'6. In a typewriting machine, the combi- .nation of a rotatable member, a line-space lever, means operated thereby to impart a step-by-step rotation to the said member, an-
arm angularly adjustable on said member, type keys, a locking device therefor, and means operated by said arm to actuate said locking device after a predetermined number of operations of the line pace lever deposition to which said arm termined by the is adjusted.
7. In a typewriting machine. havinga carriage and a revoluble platen, the combination of a rotary member mounted on the machine frame, a line-space lever, means operated thereby to efiect a step-by-step ro- '-tation of said member, type keys, a univer- Sal locking bar, a rock shaft mounted on the machine frame, arms carried by said rock shaft, one of said arms being in the p ath fof a projection on said rotary member, and means forming an operating connectionmetween the other of said arms and the saidlocking bar.
SIZIn-a typewriting machine, the combinationof a rotary disk provided with anannular series of seats oropenings, an arm pljgoted; concentrically with said disk and i'otatable relatively thereto, a'pin carried by said arm to enga'geany one of said openingsand thereby hold the arm in adjusted position, line-space mechanism, means oper-' ated thereby to cause a step-by-step -r0t-a-' tion of said disk and arm, type keys, and
locking means therefor actuated by said arm. I
9l'In a typewriting machine, the combination of a rotary disk, a stop device to limit the rotation of the disk in one direction, an actuator carried by said disk and adjustable to different positions thereon, a line-spacelever, means operated thereby to cause a step-by-step rotation of the disk, type keys, a locking bar therefor, and means operated by said actuator to move said bar to locking position after the, disk has been rotated anumber of steps determined ,by the adjustment of said actuator.
10. In a typewriting machine, the combi nation of a carriage, a bar thereon extending longitudinally thereof, a line-space lever to operate said bar, and key lock actuating mechanism comprising a motion-transmit .ting device mounted on the machine frame in position to be'operated by said bar while the carriage is at any point in itstravel.
11. In a typewriting machine, the coinbination of a carriage, a bar extending longitudinally of the carriage and movable up and down thereon, a rod on the machine frame beneath the said bar and in operative relation thereto throughout the travel of thev carriage, a line-space lever operable to depress the bar and operate said rod, and a key lock actuating device controlled by said rod, 1
12. In a typewriting machine having a platen, carriage, line-spacing -mechanism and type keys, the combination of a lock for said keys, and lock actuating mechanismiin operative relation to the line-spacing mechanism independently of the platen and operable with each operation of said linespacing mechanism to actuate said look after a predetermined number of operations of said line-spacing mechanism, the platen being rotatable while the said actuating mechanism remains inactive.
' 13. In a. typewriting machine having a platencarriage, line-spacing mechanism and type keys, the combination of a universal bar to engage said keys, and mecha-' nism advancing with each operation of said line-spacing mechanism, to move said barv into engagement with said keys, to lock them, after a predetermined number of operat ons of said line spacing mechanism,
said advancing mechanism being inactive holding said bar norma 1y disengaged, and mechanism having a fixed position on the machine frame during the travel of the car- 'ri age, said mechanism advancing with each operation of said line-spacing mechanism, to move said bar into engagement with said keys alter a predetermined number of operations of said line-spacing mechanism, to lock said keys, said advancing mechanism being ii'iactive when the platen rotated independently of the line-spacing niechanism.
15. In a typewriting machine having a carriage. line-spacing mechanism, type keys and a lock for said keys, the combination of a loek-actuatinc train, said train mounted partly on the carriagt-n and partly on the machineframe. the train part on the-frame being operable in any position of the carriage with each operation, of said linespac ing mechanism, said train causing said; lock to engage said type keys after a predetermined number o'l. operations of said linespaeing mechanism.
1a. In a typewriting machine having a carriage, aline-spacing lever. type keys, and a lock for said keys, the eon'ibination of a lock-actuating train mounted partly on the carriage and partly on the machine frame, the part on the carriage comprising; a bar depressible with every operation of the linespacing lever, the parts on the machine trame. being operable by said bar in any position of the carriage, and adjustable means included in said train part on the frame to operate said lock after a predetermined number ot' operations of said line spacing lever.
17. in a typeu'riting machine having a carriage, a line-spacing lever, type keys, and a lock. therefor, the combination of a lock-actuating train, said train mounted partly on the carriage and partly on the machine frame, the train part upon the carriage comm-min a bar depressible With every operation ot said line-spacil'ig lever, and the train parts upon the frame, including an actuator to operate said lock a'l te a predetermined number of movements of said line-spacing lever.
18. In a typewrithng machine having a carriage, a linesspaeing lcvcr,and typekeys, the eombimition ol a lock "for said keys, and a locleaetuating train, said train mounted partly on the carriage. and partly on the machine frame, the train part upon the carriage, comprising a bar depressible with every operation of said line-spacing lever, the train parts upon the frame including a: disk with line-space graduations, and an actuator, and means adjusting said actuator relatively to said line-space gradnations on said disk. said aetuator operating said lock after a PlfllttCllllilltKl number of move ments of said line-spacing lever.
1.). in a typevviiting machine having a carriage; line-spacing inechanisn'i, type-keys, and a lock for ;aid keys, the combination. of a lock-actuati 11g train comprising reciprocating parts on the carriage and parts on the machine trame capable of progressive, movement with every operation of the line-spacing mechanism, and n'ieans for adjusting said mechanism to enable it to actuate said lock alter a predetermined number oi operations of said line-spacing mechanism.
20. In a typewritingmachine having a carriage, line-spacing mechanism. type keys, and a lock -lt'or said keys, the combination ot a lock-actuating train mounted in part upon the carriage and in partupon the machine frame, the part upon the carriage receiving: reciprocating impulses with every operation of the line-spacing mechanism, a nd. the parts upon the frame translating those reciprocating impulses into progressive impulses during a predetermined number thereof, and an. actuator included in said train to render said. lock effective after said predetern'iined number of impulses, when a desired number of lines have been Written.
21. In a typeivriting n'iaehine having a platen, carriage, line-spacing mechanism and type-keys, the combination of a lock for said keys, and means mounted on the machine tranie and acted upon in every operation of the line-spacingmechanism to automatically operate said lock, causing it to engage said keys after the writing of any predetermined number of lines upon a Worksheet, said means being inactive while the platen isrotated independently oi the linespacing); mechanism.
22. In a typeu'riting machine having a platen, carriage, line-spacing mechanism and type keys, the eon'ibiiiation ot' a lock to: said keys, and lock-actuating: means to operate said lock after the writing oi any desired number of lines upon a \vo1'l\'-sheet, the line-spaeing mechanism, in every opera tion thereof, acting upon said lock-aetnat ing means to advance the latter progressively to its operative position, the operative relation of the lock-actuating means to the line-spacing mechanism being independent of the platen to'permit the platen to be rotated Without altecting the lock-actuating m ans.
In a typeu'riting machine having a platen, carriage line-spacing mechanisn'i and type keys, the cen'ibination of a lock for said keys, lock-actuating means, and means for adjusting said lock-actmiting means to limit the number of lines of Writing permitted before the lock becomes efl'ective,the line-spacing mechanism, in every operation thereof, acting upon said. lock-actuating means'to advance the latter progressively from its adjusted position to its operative position, the platen being free from said loek-actiuiting means to permit rotation of the platen without alieeting the lockactuating means.
24. In a typewriting machine having a platen, carriage, line-spacing mechanism'and type-keys, the combination of a springpressed actuator upon the machine frame movable to engage said lock with 'said'keys, and means, also upon the machine frame, operated by the line spacing mechanism, with every ope 'ation thereof, to control the movements of said actuator and withhold the operation of the latter upon the lock until after a predetermined number of line' spacing operations have been pcrforn'ied, the platen being free from said controlling means to permit rotation of the platen without affecting said controlling means.
25. In a typewriting machine having a carriage, a platen thereon, line-spacing mechanism, and type keys, the combination of a lock for said keys, a springpressed actuator upon the machine frame, movable to engage said lock with said keys, means for adjusting said actuator to render it operative within a space of movement thereof representing a given number of lines of writing, and'means, also on the machine frame, operated bv theline-spacing mechanism, with every operation thereof, to control the movements of said actuator and withhold the operation of the latter upon the lock until after a predetermined number of line-spacing operations have been performed.
2a. In a typewriting machine having a carriage, a platen thereon, line-spacing mechanism to rotate the platen, and type keys, the combination of a universal bar arranged to swing into engagement with said keys, to lock them, an actuator adjustable to move through variable spaces each representing a number of line-spacingdistances, to operate said bar, and means upon the machine frame operated by said line-spacing mechanism, in every operation thereof, to advance said actuator concomitantly therewith, whereby the platen is rotated through the predetermined number of line spacesfor which the actuator is adjusted before said actuator operates said bar.
27. In a typewriting machine having a carriage, line-spacing mechanism, and a machine element under the control of said mechanism, the combination of an intermediary train mounted in part on the carriage and in part on the machine frame, the train'part on the carriage receiving reciprocating impulses With every operation of the line-spacing mechanism, and train parts on the frame translating those reciprocating impulses into progressive impulses, said train cooperating with said machine element after a predetermined number of operations of said line-spacing mechanism.
28. In a typewriting machine having a carriage, a'line-spacing lever and a machine element under the control of said lever, the combination of an intermediary train mounted partly upon the carriage and partly upon the machine frame. the train part on the carriage comprising a bar reciprocally depressible with every operation of the line-spacing lever, and train parts on the frame translating those reciprocal impulses into progressive impulses. said train cooperating with said machine element afte -a predetermined number of operations of said line-spacing lever.
29. In a t'ypewriting machine having acarriage, a line-spacing lever, anda machine element under the control of said lever, the
combination of an intermediary train mounted partly upon the carriage and partly upon the machine frame, the train part on the :arriage comprising a bar reciprocally depressible with every operation of the linespacing lever,'and tain parts on theframe translating those reciprocal impulses into progressive impulses and including an actuator to engage said machine element after a predetermined number ,of operations of said line-spacing lever. 1
30. In a typewriting machine having a carriage, a"linespacing lever, and a machine element under the control of said lever, the combination of an. intermediary train mounted partly upon the carriage and partly upon the machine frame, the train part on the carriage comprising a bar reciprocally depressible with every operation of the linespacing lever, and train parts on the frame translating those reciprocal impulses into progressive impulses and including a device with line-spacing graduations, said device having 'an actuator to engage said machine element after a predetermined number of operations of said line-spacing lever.
81. In a typewriting machine having a carriage, line-spacing mechanism, and a machine element under the control of said mechanism, the combination of a springpressed actuator upon the machine frame movable progressively to engage said element, and means operated by the line-spac ing mechanism, with every operation thereof, to limit the movements of said actuator and withhold the operation of the latter .upon said machine element until after a predetermined number of lii'ie-spacing operations have been perfornied. 1
In a typewriting machine having a carriage and line-spacing mechanism, the combination of a movable device upon the machine frame under the control of said mechanism, a depressible bar upon the carriage reciprocally operable with every operation of the line-spacing mechanism, and
means between said movable device and de- 1 pressilole barto advance the former step by step with every operation of the latter to a predetermined operative position.
38. In a typewriting machine having a carriage and line-spacing mechanism, the combination of a revoluble device upon the machine frame under the control of said mechanism, a depressible bar reciprocally operable with every operation of the linespacing mechanism a spring to rotate said device, and escapement means actuated. by said depressible bar with every operation thereof, to permit a step by step rotation of said device to a predetermined operative position.
The combination in a typewriting machine having a' paper carriage, of type keys, mechanism on the carriage for spacing or feeding a work-sheet line-by-line, and means automatically operated and controlled by said mechanism, in each movemen of the latter, to lock the type keys after apredetermined number of said movements, said means mounted on the machine fame so that the carriage travels relatively thereto, said spacing mechanism being in operative relation to the said means throughout the travel of the carriage.
35. In a typewriting-machine having a carriage, the combination with type keys, of mechanism for spacing or feeding a worksheet line-by-line, and means operated automatically with each operation of said mechanism, to lock the keys after a predetermined number of said operations, said means occu- 'pying a stationary position on the machineframe so that the carriage travels relatively thereto.
36. In a typewriting machine having a carriage,,the combination of key levers, a universal locking bid, a lever on the carriage for spacing or feeding a work-sheet line-byline, and means controlled by said lever, in each opelatibn thereof, to move the locking bar into position to lock the key levers after a predetermined number of said operations, said means occupying a. fixed position on the machine frame so that the carriage travels relatively thereto, said spacing lever being in operative relation to said means througlr.
out the travel of the carriage.
37. In a typmvriting machine having a papercar'riage and mechanism for spacing or feeding a work-sbeet line-by-line, the combination of type keys, a device having a step-l )y-step movement imparted thereto with each operation of said mechanism during the printing of a work-sheet, means operated by said device to automatically lock "the keys, and means for feeding the Worksheet without operating said device, thereby enabling the work-sheet to be brought to any position without locking the keys.
38. In a typmvriting machine, the combination of line-space mechanism, an escapement device having a 'step-hy-step operation and operated a step by said mechanism each operation of said meclam ism, and a universal locking bar operated by said esca'pe ment device after a predetermined number of operations of the line-space mechanism.
In a typewriting machine, the combi nation with type keys, of a carriage, a rotary plat-en, mechanism on said carriage to rotate the platen and advance a work-sheet line by line, and an escapement device upon the machine frame, stationary during the carriage movement and actuated by said mechanism in each operation thereof to lockthe type keys after a predetermined number of operations of the line-space mechanism.
40. In a'typewriting machine, the combination with a carriage having a rotary platen and a line-space lever, of a rotary disk upon the machlne frame and stationary during the carriage travel, means operated.
by the line-space lever to effect a step-bystep rotation of the disk with each operation of said lever, a universal locking bar, and means carried by the disk to effect the operation of said bar.
41. In a typewriting machine, the combination with a carriage having a rotary platen and a line-space mechanism, of an escapement wheel independently mounted 'on the machine frame, a detent operated by member, the platen being rotatable independently of saidmember, and operating connections between said'member and the unlversal bar.
43. In a typewriting machine having a carriage and arevoluble platen, the combination of type keys, a universal locking bar therefor, a device to operate said bar, escapement mechanism controlling said device, said device and escapement mechanism being separately mounted upon the machine frame, line-s ace mechanism, and means operated there y' to actuate the escapement mechanism.
44. In a typewriting machine, the combination with a rotary platen and line-space mechanism, of an escapement wheel, an operating motor therefor, an escapement devicecontrolled by the line-space mechanism and actuated at each operation of said mechanism to permit a stcp-by-stcp rotation of the escapement wheel, and indicating means actuated by the escapement wheel to indicate. the number of line-space distances through which the platen has been rotated. by the line-space mechanism.
45. In a typewriting machine, the combination with a rotary platen and line-space mechanism. of an eseapeinent wheel. an operating motor therefor. an escapement (levi e controlled by the line-space mechanism and actuated at each operation of said mechanism to permit a step-by-step rotation of the esea )ement wheel tv c-kevs. a univer- 1 locking said keys, and
sal locking bar for means actuated by the escapement wheel for moving the locking bar into locking position when the platen has been rotated a preiletermined number of line-space distances by the line-space. mechanism.
4). in a t \'pe\vr iting machine. the. combination with a carriage and a. revoluble platen thereon. of a bar on the carriage extendinglongl'itmlinally thereot. and movable up and down relatively thereto. a line-space lever means operated thereby to depress the bar at eaeh operation of the lever. an escapement mechanism mounted on the machine frame and stationaev during the travel of the carriage. means operated by each depression ol said bar to actuate the escapement mechanism. and a page-end indicator operated by said eseapement mechanism.
47. In a t vpeivritin; machine. the eomhination with a rain age and a revolnble platen thereon. ol' :1 bar on the carriage extending lone itmlinally thereol'. and movable up and down relatively thereto. a line-space lever. means operated thereby to depress the bar at each operation ol' the lever. an escapement mechanism mounted on the machine frame and s.ationar during the travel of the carriage. means operated by each depresbar to actuate the eseapement. a universal locking by said predeter- Fion of said meel anisnh t vpe-ln'ys.
tl-ierel'or. and means operated me hanism after a bai mined number of operations of the. latter by the line-space lever. to ause the lOCiilDg' bar to be moved to locking position.
48. In a typewritingmachine. the combination of a paper carriage. lineepace. mechanism COlllpllSilZgI a linesspaee lever operable to feed a wont-sheet. on the carriage. a pageend indicating device. actuating mechanism lorsaid indicating device mounted on the machine frame, and an operating device for said actuating mechanism, said operating device mounted on the carriage and operated at each ope 'ation of the line. space lever to impart a step-by-ste-p movement to said actuating mechanism. said oporationdevice being free. and disconnected from said actuating mechanism during the travel of the carriage.
49. In a typewriting machine. the eombi' nation with a rotary platen. of a line-space. lever. line-space mechanism operated thereby to rotate the. platen. a pagewnd indicator, an actuating device therefor, and means separate from said line-space meehauiran and operated by said lever at each opera tion of the lever to transmit motion to said actuating device. whereby a step-bv-step movement of said. device is ei'i'eeted as the platen rotated step by step by the linespaee mechanism.
it). in a typewriting machine. the combination with a rotary platen. ot a lim space lever. type-operating keys, a universal loelgingg, bar there-tor, mechanism operated hy thev linespace lever to rotate the platen. and means operated by said lever independently of said mechanism to cause the locking bar to be moved to locking position a l'ter a predetermined number ol operations (it the line-space lever.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515694A (en) * 1947-10-23 1950-07-18 Patrick J Casey Page end locking device for typewriter platens
US2527105A (en) * 1948-02-13 1950-10-24 James D F Smith Vertical space or line counter for typewriters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515694A (en) * 1947-10-23 1950-07-18 Patrick J Casey Page end locking device for typewriter platens
US2527105A (en) * 1948-02-13 1950-10-24 James D F Smith Vertical space or line counter for typewriters

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