US2678122A - Carriage driving mechanism for typewriters or like machines - Google Patents

Carriage driving mechanism for typewriters or like machines Download PDF

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Publication number
US2678122A
US2678122A US284983A US28498352A US2678122A US 2678122 A US2678122 A US 2678122A US 284983 A US284983 A US 284983A US 28498352 A US28498352 A US 28498352A US 2678122 A US2678122 A US 2678122A
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United States
Prior art keywords
shaft
spring
barrel
carriage
worm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US284983A
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English (en)
Inventor
Fortune P Ryan
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.)
Royal Typewriter Co Inc
Original Assignee
Royal Typewriter Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Royal Typewriter Co Inc filed Critical Royal Typewriter Co Inc
Priority to US284983A priority Critical patent/US2678122A/en
Priority to CH311241D priority patent/CH311241A/fr
Application granted granted Critical
Publication of US2678122A publication Critical patent/US2678122A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/18—Character-spacing or back-spacing mechanisms; Carriage return or release devices therefor
    • B41J19/34—Escapement-feed character-spacing mechanisms
    • B41J19/36—Driving mechanisms, e.g. springs stressed during carriage return

Definitions

  • This invention relates to carriage driving mechanism for a typewriter or like machines and more particularly to means for varying the force with which a spring motor drives the machine carriage in the letter spacing direction and for indicating the loading of the spring motor.
  • Many machines of the class referred to, e. g. typewriters are equipped with a carriage driving mechanism including a spring barrel connected to the carriage by gearing or more commonly by a draw band wound around the barrel and connected to the carriage.
  • new and improved mechanism for adjusting the loading of the motor or barrel spring and for indicating the degree of loading of the spring to enable the operator to visually determine the loading from a point generally above and in front of the machine while simultaneously eiiecting the adjustment.
  • An object of the invention is to provide carriage driving mechanism of the character referred to including a spring barrel or motor and improved mechanism for adjusting the loading of the spring.
  • Another object of the invention is to provide such mechanism which is so constructed and arranged as to permit adjustment to be effected easily by means of a finger piece or device located outside the machine frame.
  • Another object of the invention is to provide such a mechanism including a novel arrangement of worm and worm wheel for adjusting the spring tension or loading, the reactive force of the spring itself maintaining the worm shaft against axial movement so as to dispense with the necessity of providing plural thrust bearings for the worm shaft.
  • Another object of the invention is to provide a novel mechanism for indicating the loading of the spring and particularly in such a manner as to enable the spring loading indication to be viewed from above and in front of the machine.
  • Figure 1 is a vertical sectional view, side to side of a typewriter embodying the invention, showing portions only of the machine frame and carriage associated with carriage driving mechanism, some parts being shown in elevation;
  • Figure 2 is a perspective view of a worm and shaft for adjusting the driving mechanism drawn on a reduced scale
  • Figure 3 is a perspective view of a shaft and worm wheel
  • Figure 4 is a fragmentary vertical sectional view, fore and aft of the machine on the irregular line 4-4 of Figure 1 with some parts shown in elevation;
  • Figure 5 is a detail elevational view showing a spring anchor, spring, and shaft, as viewed when looking in the direction of the arrow !5 in Figure 4;
  • Figure 6 is a fragmentary detail view partly in elevation and partly in section showing mechanism for operating an indicator to show the adjustment of the carriage driving mechanism.
  • Mechanism constructed in accordance with the invention is shown as being embodied in a typewriter having a main frame A, equipped with a supporting bracket I for a lower track rail 2 carrying anti-friction balls 3 which support a top rail 4 forming part of a carriage B, the rails 2 and 4 and the balls 3 serving to mount the carriage B for letter spacing and return movements on the frame A.
  • a spring motor generally designated C is mounted on the frame A and is connected to the carriage B for urging the carriage to move to the left as viewed in Figure 1, i. e. in the letter spacing direction, under the control of suitable feeding mechanism, e. g. an escapement mechanism (not shown).
  • the spring motor 0 includes a barrel 5 urged by a spring 6 to rotate counterclockwise in the direction of the arrow at in Figure 1.
  • a draw band 'i wound around the barrel 5 has one of its ends anchored as at 8 to the barrel and has its; other end equipped with a clip 9 which is fitted over an ear Ill on the carriage 13.
  • the motor C is carried by a bracket generally designated H secured by screws 12 to the rear wall of the frame A.
  • the bracket II is formed with a front plate I 3 and a rear plate I 4 which are apertured to provide aligned bearings for a shaft I5 extending fore and aft of the machine and being rockably adjustable in the plate bearings.
  • a spring anchor I6 is secured to the shaft I5 by a set screw I1 and is positioned on the shaft so as to be disposed within and at the center of the barrel 5.
  • the anchor I3 is formed at its rear end with a sleeve part I 3 for mounting the inner race I9 of a ball bearing assembly generally designated 20, a nut 2I on the threaded outer end of the sleeve I8 holding the inner race I9 securely on the anchor I6.
  • Anti-friction balls 22 surrounding the inner race I9 are in turn surrounded by an outer bearing race 23 which has a snug fit, as for example a press fit, in the hub part 24 of a rear disc-like wall 25 of the barrel 5.
  • the front disc-like wall 26 of the barrel is formed with a central aperture 21 surrounding the front end of the spring anchor without, however, engaging the anchor.
  • the barrel 5 may be equipped with a gear 28 for operating ribbon spool driving mechanism (not shown).
  • the inner end of the coiled spring 3 is formed with a hook 29 which engages a correspondingly shaped lug 33 on the spring anchor I6 for enabling the spring to be moved or loaded by rotating the shaft I5, and hence the spring anchor, counterclockwise as viewed in Figure 5.
  • the outer end of the spring is formed with a loop 3i fitted over a pin 32 extending between the rear and front walls 25 and 26 of the barrel 5.
  • Mechanism is provided for conveniently adjusting the position of the anchor 16 angularly about the axis of the shaft I5 so as to vary the loading of the spring 6 and hence vary the force with which the carriage B is urged toward the left.
  • a shaft 33 extends sideto-side of the machine through an aperture 34 in one side wall 35 of the frame A.
  • the inner end of the shaft 33 is formed with a reduced portion 36 and a worm 3'! which meshes with a worm wheel 38 secured to the spring adjusting shaft I5 by a set screw 33.
  • the bracket I I has a depending part 49 provided at its end with a vertically disposed bearing part 4I formed with an open top bearing recess 42 which receives the reduced part 36 of the shaft 33, the arrangement being such that the aperture 34 in the frame wall 35 and the bearing recess 42 journal the shaft 33 for rotation.
  • the motor spring 6 reacts on the anchor I6, shaft I5 and worm wheel 38 so as to tend to turn the worm wheel 38 clockwise, that is in the direction of the arrow 1) in Figure 1, in consequence of which the worm wheel 38 tends to force or thrust the worm 31 and shaft 33 toward the left.
  • This thrust is resisted by engagement of the left end 3'1 of the worm 31 with the right face 4I of the vertical bearing part M on the bracket II.
  • a single thrust bearing provided by the parts 37 and 4M serves, with the cooperation of the spring 6, anchor l6, shaft I5 and worm wheel 38, to maintain corresponding extent.
  • a finger piece as shown a knurled knob 43, secured to the shaft 33 by a screw 43 provides for easy manual turning of the shaft 33.
  • the knurled knob 43 and shaft 33 are turned so as to cause the worm 31 to rotate the worm wheel 38, shaft I5 and spring anchor I6 clockwise as viewed from the front if the spring loading is to be increased, or counterclockwise if the spring loading is to be decreased.
  • an indexed indicator member or dial is journaled for limited rotation on the bearing part 45 of a screw 46 carried by the upper part of the front bracket plate l3, a spacer 4'? being interposed between the bracket plate I3 and the dial 44.
  • the dial 44 is formed with two sectors, one sector 48 comprising an arcuate indexed portion and being of relatively large radius, and the other sector 49 being of relatively small radius.
  • the sector 48 has a bevelled peripheral face, the longer radius edge of this sector being disposed toward the rear of the shorter radius edge as shown in Figure 4.
  • the sector or portion 49 is arcuately toothed and meshes with the teeth of the worm wheel 38 so that when the worm wheel is rotated for adjusting the spring tension the indicator dial 44 will be rotated a
  • the Worm wheel 38 has relatively wide teeth for smooth and proper cooperation with the worm 3i, and these teeth have a circumferential lead or slant as is characteristic of conventional worm Wheel teeth.
  • the teeth of the sector 49 are formed so as to be relatively narrow as compared to the teeth of the worm wheel 38.
  • are provided at the peripheral meetin points of the sectors. These shoulders are engageable respectively with the worm wheel 38 for limiting th permitted rotation of the dial 44 and worm Wheel 38 and for thus limiting the extent to which the spring anchor It can be turned for adjusting the loading of the spring 6.
  • a top plate or masking part 52 secured to the frame A by screws 53.
  • the plate 52 is formed with an opening 54 behind the carriage B sufficiently large to permit the top part of the dial 44 to project slightly above the plate 52 so that it may easily be viewed from a position above and in front of the dial, thus enabling the operator to observe the indicator dial from a position generally in front of the machine and while ad justing the mechanism by turning the knob 43.
  • Part of the plate 52 immediately in front of the openin 54 is depressed as shown at 55 so as to provide a pointer adapted to be viewed in connection with the indicia or numerals on the dial 44.
  • a frame having a masking part with an Opening therein; a carriag mounted for letter spacing and return travel on said frame; a spring motor mounted on said frame; driving connections between said motor and said carriage; means for adjusting said motor to vary its driving effect onsaid carriage, said adjusting means being substantially enclosed and hidden by said frame; a member connected to said adjusting means and projecting through a wall of said frame; a manually operable finger piece on said member outside said wall for operating said member from a location outside said wall to operate the frame enclosed adjustin mechanism; a device bearing indicia for indicating the adjustment of said motor;
  • a frame a carriage mounted for letter spacing and return travel on said frame; a spring motor mounted on said frame; driving connections between said motor and said carriage; means for adjusting said motor to vary its driving effect on said carriage, said adjusting means being substantially enclosed and hidden by said frame; a member connected to said adjusting means and projecting through a wall of said frame; a manually operable finger piece on said member outside said wall for operating said member from a location outside said wall to operate the fram enclosed adjusting mechanism; a device bearing indicia for indicating the adjustment of said motor; means mounting said device in a position enabling it to be observed from outside said frame; and means enclosed and hidden by said frame for drivingly connecting said adjusting means to said device.
  • a frame In a typewriter or like machine, a frame; a carriage mounted for letter spacing and return travel on said frame; a spring motor mounted on said frame; driving connections between said motor and said carriage; means for adjusting said motor to vary its driving effect on said carriage, said adjustin means being substantially enclosed and hidden by said frame; a member connected to said adjusting means and projecting through a wall of said frame; a manually operable finger piece on said member outside said wall for operating said member from a location outside said wall to operat the frame enclosed adjusting mechanism; a device bearing indicia for indicating the adjustment of said motor; means mounting said device on said frame so as to be substantially enclosed and hidden by said frame; an opening in said frame through which a part only of said device extends to enable it to be observed from outside said frame; and means enclosed and hidden by said frame for drivingly connecting said adjusting means to said device.
  • a frame In mechanism for driving the travelling carriage of a typewriter or like machine, a frame; a shaft journalled on said frame for rotary adjustment; a barrel mounted for rotation coaxially with said shaft and having means for drivingly 6 connectin said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; means for rotating said shaft for variably loading said spring comprising a worm wheel fixed to said shaft, and a rotatable worm cperatively engaging said worm wheel and being provided with means, for rotating said worm; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising an indexed indicator device and a toothed part drivingly connected to said device and meshing with said worm wheel.
  • a frame journalled on said frame for rotary adjustment; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; means for rotating said shaft for variably loading said spring comprising a worm wheel fixed to said shaft and having teeth which are relatively wide in a direction parallel to said shaft, and a rotatable worm cperatively engaging said worm wheel and being provided with means for rotating said worm; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising a rotatable indicator member having an indexed portion and an arcuate portion formed with relatively narrow teeth, and means mounting said indicator menu her for rotation about an axis parallel to the axis of said shaft and with the relatively narrow teeth of said indicator member meshing with the relatively wide teeth of said worm wheel.
  • a frame structure In a'typewriter or like machine, a frame structure; a carriage mounted thereon for letter spacing and return travel from side to side of the machine; a shaft journalled for rotary adjustment on a rear part of said frame structure and extending fore and aft of said machine and below the top of said frame structure, a rear top part of said frame structure covering said shaft; a barrel mounted for rotation coaxially' with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; adjusting means mounted under and covered by said frame structure rear top part for rotating said shaft for variably loading said spring; an opening in said frame structure rear top part; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising an indexed member, means mounting said member so that a part of said member and said mounting means therefor are covered by said frame structure rear top part and another part of said member is so positioned with respect to
  • a frame structure In a typewriter or like machine, a frame structure; a carriage mounted thereon for letter spacing and return travel from side to side of. the machine; a shaft journalled for rotary adjustment on a rear part of said frame structure and extending fore and aft of said machine and below the top of said frame structure, a rear top part of said frame structure covering said shaft; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to saidcarriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; adjusting means mounted under and covered by said frame structure rear top part for rotating said shaft for variably loading said spring and comprising a worm wheel fixed to said shaft, and a rotatable worm operatively engaging said Worm wheel and being provided with means for rotating said worm; an opening in said frame structure rear top part; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising an indexed member
  • a frame structure a carriage mounted thereon for letter spacing and return travel from side to side of the machine; a shaft journalled for rotary adjustment on a rear part of said frame structure and extending fore and aft of said machine and below'the top of said frame structure, a rear top part of said frame structure covering said shaft; a barrel mounted for rotation coaxially with said shaftand having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a, predetermined direction; adjusting means mounted under and covered by said frame structure rear top part for rotating said shaft for variably loading said spring and comprising a worm wheel fixed to said shaft, and a rotatable worm operatively engaging said worm wheel and being provided with means for rotating said worm; an opening in said frame structure rear top part; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising'an indexed member having an arcu
  • a frame structure a carriage mounted thereon for letter spacing and return travel from side to side of the machine; a first shaft journalled for rotary adjustment on a rear part of said frame structure and extending fore and aft of said machine and below the top of said frame structure, a rear top part of said frame structure covering said shaft; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrelto said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; adjusting means mounted under and covered by said frame structure rear top part for rotating said shaft for variably loading said spring and comprising a worm wheel fixed to said shaft, a worm operatively engaging said Worm wheel and being rotatable about an axis extending from side to side of the machine, a worm shaft fast with said worm and projecting through and outwardly beyond a side wall of said frame structure, and a finger piece on
  • a frame In mechanism for driving the travelling carriage of a typewriter or like machine, a frame; a shaft journalled on said frame for rotary adjustment; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; means for rotating said shaft for variably loading said spring comprising a worm wheel fixed to said shaft, and a rotatable worm operatively engaging said worm wheel and being provided with means for rotating said Worm; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising a rotatable indicator member having an indicia bearing sector of relatively long radius and a toothed sector of relatively short radius, the difference in the radii of said sectors providing substantially radial shoulders at the peripheral meeting points of said Seetors, and means mounting said indicator member for rotation about an axis parallel to the axis of said shaft and with the toothed
  • a frame for driving the travelling carriage of a typewriter or like machine, a frame; a shaft journalled on said frame for rotary adjustment; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; means for rotating said shaft for variably loading saidspring comprising a worm wheel fixed to said shaft and having teeth which are relatively wide in a direction parallel to said shaft, and a rotatable worm operatively engaging said worm wheel and being provided with means for rotating said worm; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising a rotatable indicator member having an indicia bearing sector of relatively long radius and a toothed sector of relatively short radius, the teeth of said toothed sector being relatively narrow and the difference in the radii of said sectors providing substantially radial shoulders at the peripheral meeting points of said sectors, and means mounting said
  • a frame In mechanism for driving the travelling carriage of a typewriter or like machine, a frame; a first shaft journalled on said frame. for rotary adjustment; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction and to urge said shaft reactively to rotate in the opposite direction; a worm wheel fixed to said shaft; a worm meshing with said worm wheel and being subjected thereby to axial thrust force due to the reactive urge of said spring; a worm shaft fast with said worm; means including a single fixed thrust bearing part and a single cooperating l.
  • a rotatable indicator member having an indicia bearing sector of relatively long radius and a toothed sector of relatively short radius, the difference in the radii of said sectors providing radial shoulders at the peripheral meeting points of said sectors; and means mounting said indicator member for rotation about an axis paralsaid first shaft and with the toothed sector of said indicator member meshing with said worm wheel, said shoulders being respectively engageable with said worm wheel to determine the limits of movement of said indicator member and said worm wheel to thereby limit the range of adjustment of said first shaft, and consequently to determine the limits of variation of loading of said spring.
  • a frame structure In a typewriter or like machine, a frame structure; a carriage mounted thereon for letter spacing and return travel from side to side of the machine; a shaft journalled for rotary adjustment on a rear part of said frame structure and extending fore and aft of said machine and below the top of said frame structure, a rear top part of said frame structure covering said shaft; a barrel mounted for rotation coaxially with said shaft and having means for drivingly connecting said barrel to said carriage; a coiled spring connected at its opposite ends to said shaft and said barrel respectively and being adapted when loaded to urge said barrel to rotate in a predetermined direction; adjusting means mounted under and covered by said frame structure rear top part for rotating said shaft for variably loading said spring; an opening in said frame structure rear top part; and means for indicating the adjustment of said shaft and hence the loading of said spring comprising an indexed member having an arcuate part formed with a bevelled peripheral face bearing indicia, means mounting said indexed member for rotation about an axis parallel to said shaft and below said frame structure

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  • Character Spaces And Line Spaces In Printers (AREA)
US284983A 1952-04-29 1952-04-29 Carriage driving mechanism for typewriters or like machines Expired - Lifetime US2678122A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US284983A US2678122A (en) 1952-04-29 1952-04-29 Carriage driving mechanism for typewriters or like machines
CH311241D CH311241A (fr) 1952-04-29 1953-03-26 Machine munie d'un chariot, notamment machine à écrire.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US311241XA 1952-04-29 1952-04-29
US284983A US2678122A (en) 1952-04-29 1952-04-29 Carriage driving mechanism for typewriters or like machines

Publications (1)

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US2678122A true US2678122A (en) 1954-05-11

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Application Number Title Priority Date Filing Date
US284983A Expired - Lifetime US2678122A (en) 1952-04-29 1952-04-29 Carriage driving mechanism for typewriters or like machines

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US (1) US2678122A (fr)
CH (1) CH311241A (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US596371A (en) * 1897-12-28 To the wtckopf
US1427465A (en) * 1920-05-11 1922-08-29 Royal Typewriter Co Inc Typewriting machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US596371A (en) * 1897-12-28 To the wtckopf
US1427465A (en) * 1920-05-11 1922-08-29 Royal Typewriter Co Inc Typewriting machine

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Publication number Publication date
CH311241A (fr) 1955-11-30

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