US2231438A - Stenographic machine - Google Patents

Stenographic machine Download PDF

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Publication number
US2231438A
US2231438A US247922A US24792238A US2231438A US 2231438 A US2231438 A US 2231438A US 247922 A US247922 A US 247922A US 24792238 A US24792238 A US 24792238A US 2231438 A US2231438 A US 2231438A
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US
United States
Prior art keywords
arm
arms
lever
platen
rotation
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Expired - Lifetime
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US247922A
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English (en)
Inventor
Dold Victor Charles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Le Progres Tech
LE PROGRES TECHNIQUE
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Le Progres Tech
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/26—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for stenographic writing

Definitions

  • This invention relates to stenographic machines of the type in which the platen does not partake of longitudinal movement, but is rotated through a small angle upon the completion of each printing operation, so that successively printed letters. symbols or the like, or groups of letters, symbols or the like, occupy successive lines on a web or sheet advanced by rotation of the platen.
  • One special object of the invention is to provide, in a stenographic machine of the type mentioned, simple, practicable, reliable means whereby successive steps of advance of the platen are effected steadily and quietly and particularly in definite, invariable amounts so that successively printed lines are evenly spaced apart.
  • Another special object of the invention is to provide, in a machine of the type mentioned, simple, practical, reliable means for effecting step by step rotation of the reels carrying an inking ribbon, so that said ribbon is advanced step by step during operation of the machine, and for automatically reversing the direction of rotation of said reels at predetermined times so that the inking ribbon is wound first onto one and then onto the other of said reels.
  • Fig. l is a top plan view of a stenographic machine embodying the features of the invention.
  • Fig. 2 is a'longitudinal section on'the line 2 -2 of Fig. 1.
  • Fig. 3 is a side-elevation of the machine.
  • Fig. 4 is a detail transverse view showing particularly the gearing for rotating one of the 45 reels carrying the inking ribbon.
  • Figs. 5 and 6 are elevations of parts of the mechanism for reversing the direction of feed of the inking ribbon.
  • Figs. 7 and 8 are sectional views showing the 50 friction clutches at the ends of the platen controlling rotation of the platen;
  • Fig. 9 is a detail view illustrating the relationship to each other of certain of the hammers carrying the characters to be printed.
  • a horizontally disposed platen 2 which extends transversely of the machine and which includes shaft elements 53 projecting beyond its ends and journaied in the side-plates la, lb whereby the platen is 10 mounted for rotation.
  • a horizontal shaft l5 which extends transversely of the machine and is rockably mounted at its ends in the sideplates la, lb and which has rockably mounted 15 thereon in side to side relationship a plurality of hammers 3 and 30 for cooperation with said p1aten'2.
  • Each hammer 3 and 30 includes an arm 3a. extending upwardly from the shaft l5 and having a rearwardly directed terminal portion 3b provided with a printing character in the form of a letter, group of letters, symbol or the like, an arm 9 extending forwardly from the shaft l5 and an arm l0 extending downwardly from said shaft.
  • a crossbar 6 having therein a series of slots which open through the top thereof and which accommodate intermediate portions of a series of key levers 5, .one related to each hammer 3 and 3c.
  • the key levers 5 are rockably mounted on fulcrums at the bottoms of the slots in the bar 6 and each key lever is operatively connected with the arm 9 of its related hammer 3 or by a rod 1 slidable in an opening in a cross bar 8 mounted at its ends in the sideplates la, lb.
  • each key lever at its forward end is a key 4 for finger depression to rock the keylever, while associated with the hammers 3 and 3c are individual springs 40 1 II, which tend constantly to rotate said hammers in directions to swing their upwardly extending, printing character carrying arms forwardly with respect to or away from the platen 2.
  • the related hammer 3 or 30 is rocked in a direction to cause its printing character to cooperate with the platen 2, and whenever any key lever, after being rocked, is released, the spring ll returns the related hammer l or 30 to its normal position in which its printing character is spaced forwardly of the platen 2.
  • Any suitable stop means may be provided to determine the normal positions of the hammers.
  • the springs ll may be of any suit- I able type.
  • the springs H are of the leaf type, each being secured at one-end to a rotatably adjustable crossshaft 12 and each bearing at its other or free end against the arm In of its related hammer 3 or 30.
  • the shaft I2 by rotatably adjusting the shaft I2 the forceexerted by the springs l l on the hammers 3 and 30 may be regulated.
  • On-the shaft I2 is a ratchet wheel l3 with which cooperates a suitable pawl l4 whereby said shaft maybe held in different rotatably adjusted positions.
  • levers l6 Fixed, respectively, to opposite end portions of the shaft l5are two levers l6 of inverted L-shape, each including an arm Ilia extending forwardly from said shaft and an arm l8 extending downwardly therefrom.
  • a plate I! Connecting the arms Ilia of said levers and disposed in overlying relationship to thearms 9 of the hammers 3 and 3c is a plate I! having on its under side a suitable pad Ila for noiseless contact with.
  • said arms 9 Extending upwardly from said levers are arms IS with which cooperate springs 20 which tend constantly to rotate said levers in directions to swing their arms [6a downwardly and their arms I8 rearwardly.
  • the plate I! normally is urged downwardly with its pad Ila engaged with the arms 9.
  • a sub-' stantially vertically disposed lever 22 Disposed at one side of the machine behind one of the levers l6 and below the platen 2 is a sub-' stantially vertically disposed lever 22, which is as in the case of said first mentioned lever 22,
  • levers I6 are rocked as a result of rocking of any hammer 3 or 3c by actuation of its related key lever 5, the levers 22, 220, are rocked due to their connections with the arms IB of said levers Hi.
  • a slot 24 in which is disposed a pin 26 carried by a lever arm 25 which is rotatably mounted on one of the shaft elements 53 of the platen 2 and which is suitably: held against outward movement along said shaft element relative to the adjacent end of said platen.
  • a coil spring 58 which is fastened at one end to said lever arm 25 and which bears frictionally at its other end against arms of the levers I6, 22 and 25 is such that upon actuation of any hammer 3 or 30 the platen 2 is rotated through an angle corresponding to the spacing of successive lines to be printed on a sheet or web 6
  • the spring 58 is wound in a direction such that it does not serve to rotate the platen 2 when any given hammer 3 or 30 is rocked in a character printing direction, but does serve to rotate said platen when any given hammer 3 or 30 returns to its normal position after having effected printing.
  • the spring 58 is wound about a drum 5! fixed with respect to the platen 2 and is covered by a sleeve 59 which may serve as a retainer for a suitable lubricant, such as graphite, for the spring 58.
  • the spring 55 is wound oppositely with respect to the spring 58 and serves to hold the platen against retrograde rotation during swinging movement of the lever arm 25 as effected by depression of any key lever 5, yet does not interfere with rotation of said platen in a direction to advance the sheet or web 6
  • the spring 55 is wound upon a drum 54 fixed with respect to the platen 2 and is covered by a lubricant retaining sleeve 56.
  • the two springs 55, 58 obviously act to hold the platen against rotation except when it is advanced by actuation of the lever arm 25 and. moreover, serve as silent clutch means for effecting step by step advance of said platen.
  • a pair of drum shafts 35b, 3512 are rotatably; mounted in the side plates la, lb respectively, and carry, at the outer sides of said side plates, drums 35, 35a respectively, on which are wound the ends of an inking ribbon 60, which is suitably guided along the front of the platen 2 between said platen and the character carrying rearward extensions 3b of the arms 3a of the hammers 3, 30, so that whenever any hammer 3 or 30 is rocked by actuation of its related key lever 5 its character is printed upon the sheet 6
  • gear wheels 34, 34a Fixed on the drum shafts 35b, 351) are gear wheels 34, 34a, respectively, with which cooperate pinions 32, 32a, respectively, carried by arms 21, 21a, respectively, which are disposed substantially horizontally and which extend rearwardly from the levers 22, 22a, respectively, to which they are pivotally connected at their forward ends as indicated at 28 at points below the pivots 23 of said levers 22, 22a.
  • Each pinion 32 by a suitable pawl and ratchet or similar mechanism, designated generally 1 as 33, is mounted on its related arm 2'! for free rotation relative thereto in one direction and for nonrotation relative thereto in the opposite direction, the said directions of free rotation and non-rotation being such that said pinions rotate freely relative to the gear wheels 34 when either arm 21 is moved forwardly, and are non-rotatable. in the opposite direction so that when either arm'2l is moved rearwardly and its pinion 32 is in mesh with the related gear wheel 34, rotation is imparted to such gear wheel in a direction to impart inking tape winding-on rotation to the related drum 35.
  • pivoted levers 30, 30, respectively which carry rollers 29, 29, respectively, engaged with the under sides of said arms 21, 21a, respectively, and which are biased by suitable springs 3
  • Each stop pawl 39 is biased by a spring 40 to a position against a stop 4
  • the related lever 36 assumes a predetermined starting position against its related pawl 39, as illustrated by dot and dash lines in Fig. 2 of the drawings, from which position it is advanced when, subsequently, inking tape winding-on rotation is imparted to the related shaft 35b.
  • the other arms of the levers 36, 36a carry pins 31, 31a, respectively, for cooperation with gearwheels 42, 42a, respectively, mounted on stub shafts carried by the side plates la, lb, respectively.
  • the pin 31 engages, once during each complete rotation of the lever 36, with the teeth of the related gear wheel 42 and imparts partial rotation thereto.
  • gear wheels 42, 42a Fixed to the gear wheels 42, 42a are pinions 43, 43a, respectively, which mesh with gear Wheels 44, 44a, respectively also mounted on stub shafts carried by the side plates la, lb, respectively. Fixed with respect to the gear wheels 44, 44a are pinions 45, 45a, respectively, which mesh with gear wheels. 46, 46a, respectively, fixed to opposite end portions, respectively, of a crossshaft 41. Thus, between each gear wheel and the shaft 41 there is a reduced speed gear train so that a large number of revolutions of either.
  • the two-arm levers 49, 490 are disposed at the outer sides of the plates la, lb, respectively, and the pinsor rollers 5
  • the earns 48, 48a are of semi-circular shape and are disposed diametrically opposite each other. Moreover, the levers 49, 49a are disposed relative to said cams, respectively, and the arms of each lever are disposed relative to each other, so that when either cam 48 is in an upper position, as shown in Fig. 6,'the related lever 49 is permitted to be swung upwardly by its associated elevating means 29, 30 and 3
  • the operation of the machine is as follows: Upon depression of any key lever 5, the related hammer 3 or 30 is rocked and, acting through the ribbon 66, pro- 'duces an impression of its character on the paper sheet 6
  • the lever 25 is swung forwardly advancing the but rearward shifting of the other of said arms 21 results in a 'step of rotation being imparted to the related gear wheel 34, due to the cooperation of the pinion 32 of such arm 21 with said related gear wheel 34.
  • the related inking ribbon drum 35 therefore hasimparted thereto one step of rotation in an inking ribbon winding-on direction, the inking ribbon unwinding from the other drum 35 because the latter drum is free to rotate in an inking ribbon unwinding direction.
  • the upper and lower portions of the ribbon 60 may be of diiierent colors, black or blue and red, respectively, for example.
  • the hammers 3 may produce characters of one color and the hammers 30 may produce characters oi a different color.
  • the-hammers 3c are iew in number and carry punctuation marks.
  • a stenographic machine having an inking ribbon, a pair of drums on which the ends of said inking ribbon are wound, a pair of gear wheels one fixed to each drum, a pair of pinions one related to each gear wheel, means whereby said pinions are reciprocated, means permitting rotation of each pinion in one direction and holding it against rotation in the opposite direction so that reciprocation of either pinion eiiects rotation of its related gear wheel and drum in only a single direction, a pair of rotatable cams one related to each pinion, a reduced speed train of gearing between each gear wheel and both of said cams, and means between each cam and its related pinion eiiective to hold the related pinion in an inoperative position relative to its related gear wheel when the cam is in one position and to permit the related pinion to assume an operative position relative to its related gear wheel when the cam is in another position, said cams being disposed diametrically opposite each other so that said pinions are rendered alternately operative and inoperative relative to their
  • a stenographic machine having an inking ribbon, a pair of drums on which the ends of said inking ribbon are wound, a pair of gear wheels one fixed to each drum, a pair of pinions one related to each gear wheel, a pair of pivoted arms each carrying one of said pinions and each connected for reciprocation, thereby to reciprocate said pinions relative to their related gear wheels, means permitting rotation of each pinion in one direction and holding it against rotation in the opposite direction so that reciprocation of either pinion effects rotation of its related gear wheel and drum in only a single direction, means tend-' ing constantly to swing said arms to dispose said pinions operatively relative to their related gear wheels, a pair of rotatable cams of substantially semi-circular shape one related to each arm, a reduced speed train of gearing between each gear wheel and both of said cams, means between each cam and its related arm efieotive to hold the arm in a swung position preventing cooperation of the related pinion with its related gear wheel when the cam is in one position and to

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US247922A 1937-12-30 1938-12-27 Stenographic machine Expired - Lifetime US2231438A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR503367X 1937-12-30
FR2231438X 1937-12-30

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US2231438A true US2231438A (en) 1941-02-11

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US247922A Expired - Lifetime US2231438A (en) 1937-12-30 1938-12-27 Stenographic machine

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US (1) US2231438A (fr)
FR (1) FR840361A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523587A (en) * 1946-08-15 1950-09-26 Nunn George William Platen actuating and ribbon feed mechanism for stenographic machines
US2545375A (en) * 1946-08-15 1951-03-13 Nunn George William Type lever arrangement for stenographic machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2523587A (en) * 1946-08-15 1950-09-26 Nunn George William Platen actuating and ribbon feed mechanism for stenographic machines
US2545375A (en) * 1946-08-15 1951-03-13 Nunn George William Type lever arrangement for stenographic machines

Also Published As

Publication number Publication date
FR840361A (fr) 1939-04-25

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