US954637A - Type-writing machine. - Google Patents

Description

A. G. P. KUROWSKI.

TYPE WRITING MAUHINE.

APPLICATION FILED 1n. 3, 1910.

954,637. Patented Apr. 12,1910.

9 SHEETS-SHEET 1.

A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLIOATIOH TILED n.3, 1910.

954.637. Patented Apr. 12, 1910.

2 BHEBTS-BHEET 2.

, sucoee ing notch of the irreg lar line-space UNITED STATES PATENT OFFICE.

ALFRED G. F. KUROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPE- WRITEB COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Apr. 12, 1910.

-To all whom it may concern:

Be it known that I, ALFRED G. F. Konow am, a citizen of the United States, residing in New York city, borough' of Bronx, in the county of New ,York 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 line-feeding devices for typewriting machines, especially those in which a revoluble cylindrical platen is employed.

One of the main objects of the invention is to equip a machine, of this class, as for instance the well known Underwood typewriting machine, with inexpensive and readily applied mechanism for enabling the operator to effect line-spacing at intervals not agreeing or corresponding with the usual intervals. This enables the operator to write upon special ruled blanks.

In the form of the invention illustrated in the drawings, the machine is equipped with means for enabling the operator to produce uncven or irregular line-spacing. For this purpose, a special line-space wheel is employed, the notches therein corresponding to the spacing of the lines on the ruled blank which is to be written upon. A spring detent engages the notches of this special linespace wheel to hold the platen steady during the writing operation.

The platen is advanced either by means of the knob usually fixed on the platen axle or by means of 'a line-space lever and driving pawl. Preferably the lever and pawl are employed and overthrow of the platen'at the line-spacingoperation is prevented by means of a stop pawl which rules upon the periphery of the irregular line-space wheels, and clicks into the notches'thereof one after another,'always serving to arrest the platen at the proper point; the line-space detent already mentioned being arranged to become seated in the same notch that IS occupied by said stop pawl. The latter, upon the return stroke of the line-space lever, is automatic ally withdrawn from the irregular lines ace wheel, to permit independent rotation o the platen in either direction; but upon 'the succeeding advance stroke of the linespacin lever the stop-pawl falls into the wheel, to arrest thesame again;

i In order tofenablc the use of thesame regular ratchet wheel. T

machine for writing evenly spaced lines in the ordinary manner, whenever desired, said line-space lever and pawl are caused to cooperate with an evenly spaced line-space wheel, the latter having the usual detent and the usual means to prevent overthrow at the line-spacing operation.

Alswitc'lnng lever is provided to throw out either detent when the other is in use, so that the platen may be controlled alternatively by said detents. Said switching lever, when throwing oif the detent from the regular line-spacing ratchet, concomitantly silences the stop-pawl above mentioned, so thatthc entire special irregular spacing devices are silenced whcnvthe machine is used for even line spacing. Said switching lever may also be thrown to a third position to release both of the spring detents as well as i the stop'pawl, to permit fine or irregular rotative adjustments of the platen by means of the usual knob, when re uired.

It will be understood t at both the even and uneven line-feeding movements of the platen may be elfected by the line-feeding lever and drive-pawl usuallyprovided on said Underwood machine, said pawl always engaging the teeth of the regular ratchet wheel, and the latter bein fixed to the irfie strokes of the line-feeding lever vary in length according tothe distance between the succeeding teeth of the irregulir ratchet wheel; but it is found in practice that the irregular linefeeding can be effected in this we the rangeof movement of said lever an pawl being great. enough for the purpose of ordinary irregular iine-spac ing. In otherwords, the capacity of the usual line-spacing means, bein equal to three notches ofthe usual even y spaced ratchet, is found great enough to accommodate the longest movement reguired in ordinary irregularline-spacing,

f course the range of movement of the" is a. perspective view of one end 0 platen frame and platen of an f the front strike writing machine, showing the 2 is a erspective view 0 two spring detents and t e stop-pawl, together with a single stud upon WlllCh they ma all be ivoted. Fig. 3 is an end view 0 the me anism, showing the parts in normal positions, but arranged for irregular linespacin Fig. 4: is a rear view of one end of the p aten and its appurtenances. Fig. 5 is a view similar to Fig. 3,'but showing the platen as being rotated for uneven line-spacing. Fig. .6 is a view similar to F '5, but showing the parts at the end of a lineacing stroke, the

platen being arrested by t e e agement of the stop-pawl with a notch oft e i lar line-space wheel. Fig. 7 is a view s' or to Fig. 6, but on a ier r'scale, and showing the enga ment of t e'stoppawl with the notch a ittle in advance of the seating the spring-detent in the same notch, the stop-pawl having a. yielding construction to permit a slight farther advance of 'the ratchet wheel before arresting the same. Fig. 8 is a view similar to Fig. 6, but showing the irregular line-spacing devices ,as

silenced, and the platen as under the control of the .regular or even line-spacing mechanism. Fig. 9 is a view show' the platen released from the control of all the linespaoing devices. 1*" 10 is an elevation of one form of ir ar line-spacing ratchet wheel. It will be understood that the ratchet wheels may be cut in various ways to suit various requirements. i

. In said Underwood machine, types strike upon the front side of a laten 1, to which is fixed an axle 2, where y it is revolubly mounted in theends 3 of a platen 'frame 4. Upon said axle is fixed an evenly spaced linespace wheel 5, with which engages a spring-detent 6, which holds the platen steady during the writing. The line-feeding may be efi'qcted either by a'kriob 7 "on the platen axle, or by a drive-pawl 8 pivoted at 9 on a slide 10, guided for forward and backward movement in the-end 3 orthe platen frame. A'lever, 11, 'fulcrumed at 12 upon the carria ing said slide; t e latter bemg returned by a spring 14. The length of the'strokeof the sli e 10; is determined by a regulator 15. Said regulator 15 is pivoted to a horizontal link 16, Fig, 3, having a projection 17.to engage a nose or beak 18 formed upon the pawl 8,-to lift'said pawl clear of the ratchet wheel 5 on the completion of the return stroke of the slide 10. Overthrow of the platen at the regular line-spacing operation.-

18 prevented by the engagement 'ofsaid nose with a stop 19 fixed u on the platen frame end 3. As so .far descri ed, the several parts have-long been in use upon said Underwood machine. A second ratchet wheel 20,-hav- 13, is employed for drivspaced notches 21, is fixed to the even linespace wheel 5, or to the platen axle 2, sons to rotate with the platen. Pivoted upon the same stud 22 that carries the usual detent 6, is a second detent arm 23 ressed down by a spring 24 2) to seat a roll 25 in one of thenotohes 21 of the irregular linespace wheel .20; said roll being pivoted upon the forward end of the detent arm 23, and

said spring )bing preferably coiled ing determined by the position 0 I the regulator 15, which is shown in the drawings as set for a triple line-space movement of the platen at every stroke of the lever 11.

' When it is desired to write upon a card or blank having lines ruled unevenly to correspond withthe spacingv of the notches 21 in t e wheel 20, the card is inserted under the teeth 26 of a card-holder 27, or is gripped by a card-holder such as shown in the patent to John C. McLaughlin, "No. 816,174 of March 27 1906; the card-holder having a fixed position relatively to the platen, and

hence to the irre lar line-space wheel20,-so

that when the etent 25 1s seated in any notch 21, the corresponding ruled line on the blank card or sheet is in register with the printing point, so that the type impressions will fall properly u on said line. A handle 28 is graspe and t rown downwardly from .the position at Fig. 8 to that at Fig. 3, thus swinging b'ackwardly and downwardly a twesarmed switch or switch-lever 29, which is pivoted loosely upon the platen axle 2. Said lever has on one arm a cam 30, which engages the pro'ecting axle pin 31, upon hichis pivote the detent-roll 32 of the etent 6, and swings roll 32 clear of the ratchet wheel 5; sa 31 then seating itself in a notch 33in the arm 34 of said switch lever, whereby the detent roll 32 is mechanically held in silenced osition. The spring 24 now presses the etent roll 25 against the periphery of the wheel 20 and into the notches thereof. 0 eration of the lever 11 will cause the pawl to engage the teeth of the ratchet wheel 5 and rotate. the

platen; but the extent of such rotation is .now determined by a stop-pawl 35 mounted screw-stud 22. ,A spring 37 coiled about Said stud 22 tends toswing said frame in 'a direction to carry the pawl ,afidown into en- -"wheel 5. At thesame time,

acaesv gagelnenl with the irre ular I wheel; said spring, prcferah y having a hearing at one end against the hack of the detent arm 0. Owing to the pressure of said spring, the pawl 35 is forced into the succeeding notch of the advancing line space wheel 20, and positively arrests the platen, and thereby mechanically determines the extent of: the line-feeding movement thereof. At the same time the detent Q5 falls into the same notch 21 that is occupied by said steppawl 35; the wheel 20 being made extra wide for this 'urpose as seen at Fig. 4. The detent 25 ll0l( s the platen steady during the writing of a line.

Upon release of the lever 11, the spring l4 returns the slide 10, pawl 8, and the lever it back to normal iositions; and a cam 38 upon-the rear end oi the slide 10 engages the pawl frame 26 at a point back of the pivot and depresses said frame, causing its forward end to rise, thus lifting the stop-pawl 35 clear of the irregular line-space wheel 20, as at. Figs. 1 and 3. This permits independent advance rotation of the platen, if it should he desired. At this moment, a spring 39 snaps the pawl 35 forwardly toward the succeeding tooth or notch in the irregular linespace wheel 20, so that said pawl cannot immediately rengage the same tooth, but must coiiperate with said succeeding tooth to effect the next arrest of the platen.

It will he understood that. at the initial portion of the next rearward stroke of the slide 10, said cam will release the pawl frame 36 and permit the spring 37 to swing the stop-pawl 35 down into the succeeding notch of the wheel 20, to arrest. the same. The movement of the pawl 35, independent of the frame 36, is permitted and limited by reason of the engagement of slots 40 formed in said pawl with guiding pins 41 provided on the inner side of the frame 86. spring 39 )ulls the pawl forwardly, the front end oi the spring being caught onthe front pin 41 and the rear end thereof'bein caught upon an ear 42 formed on the pawl When it IS desired again to use the machine for even line-spacing, the handle 28 is swung from the position at Fig. 3 to the position at Fig. 8, permitting the detent 32 to resume its normal relation with the even ratchet an arm 43 of said two-armed lever :29 swings forwardly, so that a lip 44 on said arm engages and forces up the detent 25, thus silencing the same; said detent seating in a notch 45 in the arm 43 or in the lip44, and holding the two-armed lever 29 stationary. Said hp 44 also cams the stop-pawl 35 upwardly, thereby silencing the same as at Fig. 8 Bypressing the handle 28 still farther upwardly, the switch-lever is swun to the osition at. Fig. 9, to throw ed the dent-r0132 as well as decent-roll 25 and stop-pawl 35. A cam 46 line-space The on said switch-lever engages the pin 31 of the detent-roll 32, and swings said roll clear of the wheel 5, said pin falling into a notch 47 to hold the switch'levcr steady. The lip 44 is long enough to hold the dctent-roll .35 and the stop-pawl 35 both out of use at this time, as at Fig. 9. The platen may now be turned freely in either direction to any point required.

Variations may be resorted to within the scope of the invention, and portions of the improvements may he used without others; certain features of the invention, for instance, not being limited to machines 'in which an even line-spacing mechanism is employed.

Having claim:

1. The combination of a platen, a ratchet having unevenly spaced teeth or notches, a detent to engage said teeth or notches to hold the platen stationary during the writing of a line, means to advance said platen, and a stop pawl to engage the teeth of said ratchet to limit the advance movement of the platen.

2. The combination of a platen, a ratchet having unevenly spaced teeth or notches, a detent to engage said teeth or notches to hold the platen stationary during the writing of a ine, means, including a reciprocatory lever, to advance said platen step by step, and a stop pawl to engage the teeth of said ratchet to limit the advance movement of the platen.

3. The combination of a revoluble platen, a ratchet wheel therefor having unevenly spaced teeth or notches, a platen frame, a spring detent to engage the teeth or notches of said ratchet wheel to hold the platen stationary means, including a reciprocatory lever and driving pawl, to effectthe uneven thus described my invention, I

linedieedmg rotative movements of said platen, and a sto pawl to engage the teeth or notches of sai ratchet wheel to determine the extent of the line-spacing movements of the platen.

4. The combination of a revoluble platen, a ratchet wheel therefor having unevenly spaced teeth or notches, a platen frame, a spring of said ratchet wheel to hold the platen stationary means, including a reciprocatory lever and driving pawl, to effect the uneven line-feedin rotative movements of said platen, an or notches of sai ratchet whee to determine the extent of the line-spacing movements of a sto pawl to'en age the teeth detent to engagethe teeth or notches the platen; means being connected to said lever and effective upon the to normal position, to release said sto pawl from said ratchet wheel and to e eet an advance movement of the stop pawl toward the succeeding tooth or notch in said ratche wheel. i

return thereof including a pawl and ratchet, a secon ratchet, the latter having unevenly spaced teeth, a detent to engage the second ratchet to hold the writing of a line, and a stop pawl to engage the teeth of the second ratchet to limit the line-spacing stroke of said reciprocating devices. 1

6. The combination with a platen, of a re ciprocatory line-feeding mechanism therefor including a pawl and ratchet, secon ratchet, the latter having une'ien% spaced teeth, a detent to engage the secon ratchet to hold the platen stationary during the writing of line, and a stop pawl to'enga the teeth of the second ratchet to limit the line-spacing stroke of said reciprocating devices, means being connected to said reciprocatory devices to release said stop pawl after the arrest of the platen thereby.

7. The combination with a platen, of a reciprocatory line-feeding mechanism therefor, including a pawl and ratchet, a second ratchet, the latter having unevenl spaced teeth, a detent to engagethe second ratchet to hold the laten stationary during the writing of a line, and a stop pawl to engage the. teeth of the second ratchet to limit the line-spacing stroke of said reciprocating devices, means being connected to said reciprocatory devices to release said stop pawl after the arrest of the platen thereby, and means being provided to cause said stop pawl, when released, to advance toward the next tooth of the second ratchet. I

8. The combination with a platen, of a reciprocatory line-feeding mechanism therefor including a pawl and ratchet, a second ratchet, the latter having unevenly spaced teeth, a detent to engage the second ratchet to hold the laten stationary during the writing of a line, a stop pawl'to engage the teeth of the second ratchet to limit the linespacing stroke of said reciprocating devices, a returning spring for said line 7 feeding mechanism a cant caused by said spring to engagesaid stop pawl to release 'thesame, an a s ring to advance said stop awl, when release toward the next tooth o the second ratchet. i

9. The combination with a movable platen and means to advance the same in line-space direction, of a line" space wheelor device therefor havin separatedgroups of line flpace notches ormed therein, and a spring etent to ride upon theperiphery or surface of said wheel to snap in thenotches and hold the platen steady during the writing of thelines'; the portions of the wheel between the notches or groups left substantially full or uncut, to mnkeidead surfaces for the detcntw jde idLj ;:oVcr, sp that it platen stationary during theboth a detent and a stop either the first detent or said sto ingofa may control the platen only by falling into the line-spacing notches.

10. The combination with a movable .p aten provided with both an evenly-spaced r tchet and an unevenl spaced ratchet, of

ratchets, of a detent 'for one of sai ratchets' both a detent and a stop pawl for the other 0 said ratchets, and means shiftable to silence either the first detent or said stop pawl together with the second detent.

'12. The combination with a movable platen provided with difi'erentl ratchets, of a detent for one of mi ratchets, pawl for the other of said ratchets, means shiftable to silence pawl together with the second detent, an a driving. pawl and lever for one of said ratchets.

13. The combination with a movable platen V provided with difi'erentl spaced ratchets, of a detent for one of saitl ratchets, both a detent and a stop pawl for the other of said ratchets means shiftable to silence either the first detent or said stop pawl together with the second detent, a drivin pawl and lever for one of said ratchets,an a shiftable regulating device for controlling the length of the line-feeding movement of the platen efiected by said pawl and lever.

14. The combination with a revoluble platen, of an evenly-spaced ratchet connected thereto, a driving pawl for said ratchet, a

lever for said driving awl, a' detent for said ratchet, a second rate et, the latter having unevenly spaced teeth and also connected to said platen, a detent for said second ratchet, a stop pawl to engage said second ratchet, and means for silencing either the first detent, or said stop pawl together with the sec- 0nd detent 1 16. The combination of a laten, a ratchet having Tinevenly spaced -teeth or notches, a detent to engage said teeth or notches to hold "the lplaten stationary during the writne, means to advance said platen a stop pawl to engage the teeth of sai ratchet to limit the advance movement of spaced iii;

the platen, and means for'silencing said d'etent midfield-stop pawl concomitantly:

17. The combination with a mo Jib!" l ratchet wheel and anuni-W1ily-spacedratchet platen, of means, including an evenly-spaced ratchet connected therewith and a driving awl for said ratchet, for feeding the platen ine by line through even intervals, and means, including an unevenly-spaced ratchet and a detent therefor, for effecting uneven line-spacing or feeding of the platen at'will.

18; The combination of a revolublc platen, a ratchet wheel therefor havin 'nn evenly spaced teeth or notches, a patch frame, a. spring detent to engage the teeth or notches of said ratchet wheel to hold the platen stationary, means, including a reciprocatory lever and driving pawl, to effect the uneven line-feeding rotative movements of said platen, a stop pawl to engage the teeth or notches of said ratchet wheel to determine the extent of the line-spacing move ments of the platen, and means to enable said lever and pawl to effect uniform line feeding movements of said platen to an indefinite extent, at will.

19. The combination of a revolnble platen, a ratchet wheel therefor having unevenly spaced teeth or notches, a platen frame, a spring detent'to engage the teeth or notches of sa d ratchet wheel t 'hold the-platen Stationary, means, including a reciprocatory lcver and driving pawl, to effect the uneven line-feeding rotative movements of said platen, a stop pawl to engage the teeth or notches of said ratchet wheel to determine the extent of the line-spacing n'iovements of the platen, means being connected to said reciprocat'ory devices to release said stop pawl after the arrestof the platen thereby, and means to enable said lever and pawl to effect uniform line-feeding movements of said platen to an indefinite extent, at will.

20. The combination with a movable platen provided. with differently spaced ratchets, of a detent for each of said ratchets, and shiftab le means for either silencing both ratchets concomitantly or silencing either detent and concomitantly bringing the other detent into use. i, a

21. The combination with a platen provided with differently spaced ratchets, of detents for. said ratchets, a stop pawl for one of said ratchets, and shiftable means for either silencing both said detents and said pawl concomitantly, or silencing either one of said detents or said stop pawl together with the other of said d etents.

22. The combination with a revolnble platen provided with both an evenly-spaced ratchet wheel and an n nevenly-spaced ratchet wheel, of means to engage the ratchet wheels to hold the platet-steady during the writing operation, and shittahle means for enabling the platen to be controlled or detained by either ratchet wheel at will.

23,"l he con'ibiimtion with a revoluble platen provided with both an evenly-spaced wheel, of means to engage the ratchet wheels to hold the platen steady during the writing operation, and shiftable means for enabling the platen to be controlled or detained by either ratchet wheel at will, or to free the platen from the control of both said ratchet wheels at will.

24. The combination with a platen, of a ratchet wheel connected thereto, a lever having means to drive the ratchet wheel. a stop pawl, a pivoted frame upon which said stop pawl is mounted for independent movement, a spring to press said pawl into engagement with said wheel, means to hold said frame in pawl releasing position when the line spacing devices are in normal position, and to permit the pawl to engage the ratchet 'wheel at the initial portion of the platen .driving stroke of the line spacing devices,

means tending to advance said pawl upon said frame toward the succeeding tooth of the ratchet wheel, and means to limit the backward movement imparted by said ratchet wheel to said pawl.

25. The combination with a platen, of a ratchet wheel connected thereto, a lever having means to drive the ratchet wheel, a stop pawl, a pivoted frame upon which saidstop pawl is mounted for independent movement, a spring to ress said pawl into engagemept with said W eel, means to hold said frame in pawl releasing position when the line 5 ac mg devices are in normal posltlon, an to permit the pawl to engage the ratchet wheel at the initial portion of the )laten driving stroke of the line spacing evices, 'means tending to advance said pawl upon said frame toward the succeeding tooth of the ratchet wheel, means to limit the backward movement imparted by said ratchet wheel to said pawl, and a detent to enga e the same notch in the ratchet wheel as sairf pawl.

26. The combination with a revolublc platen, of a ratchet wheel connected thereto, reciprocatorydevices to drive said ratchet wheel and platen, a second ratchet wheel,

the latter differently spaced from the first,

and a stop pawl to engage said second wheel to arrest the platen when driven by said reciproeatorv devices.

27. The combination with a rcvolnhlc platen. of a. ratchet wheel connected thereto, reciprocatory devices to drive said ratcl'iet wheel and platen, a second ratchet wheel, the latter differently spaced from the first. a stop )awl to engage said second wheel to arrest. tlie platen when driven by said reciprocatory devices, and a spring etent to enga ethesame notch in said second wheel as said etc 1' pawl.

, 28. The con'ibination of a platen, a ratchet having unevenly spaced teeth or notches, a ietent toengage said teeth or notches to hold the platen stationary during the writing of a line, means to advance said platen, a sto pawl to engage the teeth of sea ratchet to imit the advance movement of the platen, and means to release the control of said (latent.-

29. The combination of a revoluble platen, a ratchet wheel therefor having unevenly spaced teeth or notches, a platen frame, a spring detent to engage the teeth or notches of said ratchet wheel to hold the platen Stile tionary, means including a reel rocatory lever and drivingpawl, to effect t e uneven linefeeding rotative movements of said platen, a stop pawl to engage the teeth or notches of said ratchet wheel to determine the extent of the line-spacing movements of the platen; means being connected to said lever and eifective upon the return thereof to normal position, to release said stop-pawl from said ratchet wheel and to efl'ect an advance movement'of the sto -pawl toward the succeed' tooth or note in said ratchet wheel an a single device to move and lock said detent and stop-pawl away from said ratchet wheel.

30. The combination with a. platen, of a reciprocatory line-feeding mechanism therefor, includin a pawl and ratchet, a detent for said ratc et, a second ratchet, the latter having unevenly spaced teeth, a detent to engage the second ratchet to hold the 'laten stationa during the writing of a e, a stop-paw to enga e the teeth of the second ratchet to limit t e line spacing stroke of said reciprocating devices, and a lever having means to release said detents in alternatron.

31. The combination with a platen, ,of a reciprocatory line-feeding mechanism therefor, inclurlin 'a pawl and ratchet, a detent for said ratc et, a second ratchet, the latter having unevenly spaced teeth, a detent to engage the secondratchet=to hold the laten stationary during the writingofa me, a

stop-pawl to engage the teeth of the second ratchet to limit t e line-spacing stroke of said reciprocating devices, and a lever having means to release said detents either concomitantly or in alternation.

32. The combination with a platen, of a reciprocatory line-feeding mechanism therefor, including a pawl and ratchet, a detent for said ratchet, a second ratchet, the latter having unevenly spaced teeth, a detent to engage the second ratchet to hold the laten stationar stop-paw to enga e the teeth of the second ratchet to limit t e line-spacing stroke of said reciprocating devices, means being connected to said reci rocato platen thereby, and means bei provided to cause said stop-pawl, when re eased, to -advance toward the next tooth of thesecond ratchet, and a lever having means to move platen from the during the writing of a me, a

deviceeto lease Sald -p after t e arrest of th and to move and loc said stop-pawl away from its ratchet together with its associated detent.

33. The combination with a platen, of a reciprocatory line-feeding therefor, including a pawl, a ratchet wheel, and a detent for said ratchet wheel, a second ratchet wheel, the latter having unevenly spaced teeth, a detent to engage the second ratchet wheel to hold the platen stationary during the vvrutingof a line, a stoppawlto engage the teeth of the second ratchet wheel to limit the line-spacing stroke of said reciprocating devices, a lever havingtwo cams to move the first. detent away from its ratchet wheel, and means also connectedtosaid lever to release the second detent, together with. said stop awl, either when both of said cams are i e or when one of said cams is in efi'ective position.

34. .The combination with a movable latch and means to advance the same in inc-space direction, of a line space wheel or device therefor having se arated groups of line space notches forme therein, a spring detent to ride upon the periphery or surface of said wheel to snap in the notches and hold the platen steady during the writing of the lines; the portions of the wheel between the notches or groups being left substantially full or uncut, to make dead surfaces for the detent to ride idly over, so that it may control the platen only by falling into the lines' cing notches; and means to release the p aten from the control of said line-space wheel and detent.

35. The combination with a movable platen provided with difierently s aced ratchet wheels, of a detent for one 0 said ratphet wheels, both a'detent, and a sto pawl for the other of said ratchet: whee s, and a lever havin two cams either of which may release the rst detent, said lever also having thereon a third releasing cam or de-' vice to release the'second detent together platen provided with di fi'erently spaced ratchets, of a spring-pressed 'detcnt for one mechanism a of said ratchets, a spnng-presseddetent for the other of said ratchets, and a lever having cams thereon for releasing eitherrdetent from its ratchet and concomitantly permitting the other detent to move into engage tnentwith its ratchet.

37. The combination with a platen, of an evenly-spaced ratchet connected thereto a detent for said ratchet, a second ratchet, the latter having unevenly spaced teeth and a so connected to said platen, a detent for said second ratchet, and a lever having cams thereon for silencing said detents either alternatively or concomitantly.

38. The combination with a movable platen, of means, including an evenly-spaced ratchet connected therewith and a drivin pawl and a detent for said ratchet, for feed ing the platen line by line through even intervals, and means, including an unevenlys aced ratchet and a detent therefor, for e ecting predetermined uneven line-spacing or feedmg of the platen at will, and means to release the platen from the control of said ratchets -eit er alternatively or concomitantly atwill.

39. Ihe combination with a revoluble platen, of reciprocatory devices to drive said wheel and platen, a ratchet wheel having uneven notches or teeth, a stop-pawl to engage said ratchet wheel to arrest the platen when driven by said reciprocatory devices, and means to lock said stop-pawl away from said ratchet wheel.

40. The combination with a revoluble platen, of a ratchet wheel connected thereto, reciprocatory devices to drive said ratchet wheel and platen, a second ratchet'wheel, the latter differently spaced from the first, a stop-pawl to engage said second wheel to arrest the platen w en driven by said reciprocatory devices, a spring detent to engage the same notch in sa1d second wheel as sa1d stop pawl, and means to lock said deten't and stopawl away from said second ratchet whee ALFRED G. F. KUROWSKL Witnesses:

RALPH S. WARFIELD, J 01m 0. SEIFERT.

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