US3151722A - Spring actuated typewriter action with fault sensing means - Google Patents

Spring actuated typewriter action with fault sensing means Download PDF

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Publication number
US3151722A
US3151722A US311709A US31170963A US3151722A US 3151722 A US3151722 A US 3151722A US 311709 A US311709 A US 311709A US 31170963 A US31170963 A US 31170963A US 3151722 A US3151722 A US 3151722A
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United States
Prior art keywords
actuator
spring
lever
forward stroke
interponent
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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
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US311709A
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English (en)
Inventor
Salto Rinaldo
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Olivetti SpA
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Individual
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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
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/18—Locks
    • B41J5/22—Interlocks between keys, e.g. without detent arrangements
    • 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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/02—Type-lever actuating mechanisms
    • B41J7/30—Preventing rebound or clash of levers or type members
    • 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
    • B41J7/00—Type-selecting or type-actuating mechanisms
    • B41J7/92—Impact adjustment; Means to give uniformity of impression

Definitions

  • This invention relates to a power operated typewriter comprising a set of type actions each one connected to an interponent adapted to be coupled with a common reciprocable actuator for the forward stroke thereof and to condition a cyclically operating mechanism for operation at the depression of a corresponding key, and a spring for reciprocating said actuator through said forward stroke, said actuator being restored and said spring being tensioned by said mechanism.
  • the spring of the actuator is strong enough to actuate but one type action and not strong enough to actuate more than one type action, thus preventing the simultaneous operation of two or more type bars. Since the type bars having different printing area require different force of impact, they should be provided with different restoring springs. In this case it is impossible to have an actuating spring strong enough to actuate for example a single type bar having a big printing area and not strong enough to actuate two type bars having a small printing area. Therefore such a known typewriter cannot have the individual restoring spring corresponding to the printing area of the type bar, whereby the print work does not result uniform.
  • the force of impact cannot be adjusted, for example in order to simultaneously print a number of copies or according to the position of the case shifting device.
  • the primary object of the invention is to provide a typewriter of the above type adapted to produce a uniform print work.
  • Another object is to provide a typewriter wherein the simultaneous impact of more than one type bar is prevented.
  • Another object is to provide a typewriter wherein the force of the impact is individually adjustable according to the printing area of the character.
  • Still another object is to provide a typewriter wherein the force of the impact of all type bars is simultaneously adjustable both manually and automatically under the control of the case shift device.
  • a further object is to provide a typewriter wherein the shock of the common actuator against the coupled interponent is prevented.
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common reciprocable actuator for said type actions
  • FIG. 1 is a right-hand partial longitudinal sectional view of a typewriter according to the invention.
  • FIG. 2 is another right-hand partial longitudinal sectional view of the machine
  • FIG. 3 is a third right-hand partial longitudinal sectional view of the machine
  • FIG. 4 is a partial plan view of the machine
  • FIG. 5 is a right-hand longitudinal view of a detail of FIG. 2 in an operated position.
  • the typewriter comprises a set of type actions each one having a type bar 7 pivoted on a circular pivot 8 carried by the usual type bar segment 9 and adapted to strike against a platen 6.
  • Each type bar 7 is connected through a link 11 to a movable intermediate element or lever 12 fulcrumed at 13 and provided with an indented slot 14.
  • a restoring spring 16 may be anchored at the slot 14 in a variable position in order to individually adjust the force of the impact according to the printing area of the type mounted on the type bar 7.
  • Fulcrumed at 18 on each lever 12 is an interponent 19 having a projection 21 normally latched by a shoulder 22 of a latch 23 fulcrumed at 24 on the lever 12 and connected to the interponent 19 by a spring 26.
  • the latch 23 is provided with a bent lug 27 adapted to cooperate with a lever 28 fulcrumed at 29 on a key lever 31.
  • Each interponent 19 is provided with a tooth 32 by means of which may be coupled with a common reciprocable actuator formed of a universal bar 33 (-see also FIG. 4) fulcrumed at 34.
  • An arm 36 (FIG. 1) of the bar 33 is urged counterclockwise by a tensioned spring 37 conditionable for reciprocating the actuator 33 through the forward stroke thereof at a predetermined speed in the case a single interponent 19 has been coupled therewith and at reduced speed in the case more than one interponent has been coupled therewith.
  • the arm 36 is further connected through a link 38 to control means normally locking the actuator 33 at rest against the urge of said spring, said control means comprising a lever 39 fulcrumed at 41.
  • the lever 39 is provided with a roller 42 normally urged by the spring 37 to contact a cam member 43 secured to a cyclically operating mechanism comprising a sleeve 44 adapted to be conditioned for operation by each interponent at the depression of the corresponding key lever 31.
  • a universal bar 46 pivoted at 47 is urged clockwise by its weight to contact the interponents 19.
  • An arm 49 of the bar 46 is connected through a link 51 to an arm 52 of a bail 53 fulcrumed at 54.
  • a normally latched cycle conditioning element formed of a lever 58 fulcrurned at 59 is provided with a lug 57 normally latched by a second arm 56 of the bail 53.
  • a spring 61 urges the lever 58 to engage with the lug 57 the upper edge of the arm 56.
  • a second lug 62 of the lever 58 is normally located on the path of a projection 63 of each one of three clutch teeth 64 fulcrumed on three pivots 66 of the cam 43.
  • the teeth are mutually spaced apart of degrees, and are mutually connected by a ring 67 connected in turn to the cam 43 by means of a spring 68.
  • each lobe of the cam 43 comprises a first portion 111 (FIG. 2) adapted to cause said actuator to be moved at a controlled speed until contacting the coupled interponent 19, a second portion 129 adapted to condition the spring 37, and a third portion 130 adapted to restore the actuator 33.
  • a lever 72 fulcrumed at 73 is normally urged by a spring 74 to contact a second cam 71 secured to the sleeve 44.
  • the lever 72 is adapted to effect, in a manner known per se, various machine functions, as for example the ribbon vibrating and feeding.
  • the lever 72 is connected through a link 76 to means reciprocable by the mechanisms 44 at an invariable speed, said means comprising a lever 77 fulcrumed at 78.
  • Another lever 79 fulcrumed at 78 is urged by a spring 81 to contact a pin 82 of the lever 77 and is provided with a locking element adapted to be inserted on the path of the forward stroke of the common actuator 33 to intercept said actuator in the case said forward stroke is efiected at reduced speed.
  • said locking element is formed of a projection 83 of the lever 79 and is adapted to be inserted on the path of lug 84 bent from the arm 36 of the universal bar 33.
  • a lever 89 fulcrumed at 73 is normally urged by a spring 88 to contact a pin 87 of the lever 72 and is provided with a lug 91 adapted to cooperate with an arm 92 of the bail- 53.
  • the lever 58 is provided with an arm 93 adapted to cooperate with a third cam 94 secured to the sleeve 44, but since its lug 57 normally contacts the arm 56 of the bail 53, the arm 93 is normally distanced from the cam 94.
  • the lug 57 of the lever 58 is normally frontally contacted by a normally ineffective latching member formed of a tooth 96 of a bail 97 fulcrurned at 54 and urged by a spring 98 connected to an arm 102 and for causing all the coupled interponents 19 to berelatched by their latches 23 in the case the actuator 33 has been intercepted.
  • said device comprises a lug 103 (FIG. 3) of a lever 104 fulcrumed at 73 and adapted to cooperate with the arm 102 of the bail 97.
  • the lever 104 is normally urged by a spring 105 to contact a cam 106 adapted to be rotated for one revolution by the shaft 70, through a clutch generically indicated by the numeral 107 and controlled in a manner known per se by a suitable key not shown.
  • the lever 104 is connected through a link 108 to an arm of a bail 109 fulcrumed at 47, and havinga crossbar 110 embracing all the interponents 19 (FIG. 4).
  • the typewriter operates as follows:
  • the spring 68 through the ring 67 rocks the three teeth 64 counterclockwise on the respective pivots 66, engaging them 4 with the wheel 69, whereby the clutch 64, 69 is engaged and the sleeve 44 together with the earns 43, 71 and 94 (FIG. 2) is rotated for a machine cycle.
  • the slightly descending portion 111 of the cam 43 causes the lever 39 to be rocked clockwise, together with the bar 33, by the urge of the spring 37 at a controlled speed.
  • This rocking movement causes the universal bar 33 to contact the tooth 32 of the coupled interponent 19, substantially, without shock.
  • the portion 129 of the cam 43 releases the roller 42 of the lever 39, whereby the spring 37 causes the universal bar 33 to be rocked counterclockwise and to effect the forward stroke at a predetermined speed depending only from the tension of the spring 37 and of the spring 16 of the type action to be actuated.
  • the spring 37 is unable to maintain the roller 42 in contact with the portion 129 (FIG. 2) of the cam 43, whereby the speed of the bar 33 is not controlled by said portion.
  • the bar 33 in turn actuates the type action by moving forward, (leftwards in FIG. 1) the interponent 19, which rocks the lever 12 counterclockwise and through the link 11 causes the type lever 7 to strike against the platen 6.
  • the bar 33 moves the type lever 7 only for a portion of the stroke of this latter, the remaining portion being effected by the inertia of the type action.
  • the interponent 19 is rocked clockwise about the pin 18, whereby at the end of the forward stroke it is automatically relatched by the latch 23.
  • the lever 72 during its counterclockwise rotation, through the link 76, rocks the lever 77 at an invariable speed.
  • the lever 77 is followed by the lever 79 which at a predetermined instant from the beginning of the cycle inserts the projection 83 on the path of the forward stroke of the lug 84.
  • this bar is rocked at the. predetermined speed and locates the lug 84 on the path of the projection 83 of the lever 79 before the lever 77 is entirely rocked, whereby the lever 79 is arrested by the lug 84 in the position dotted in FIG. 2 and does not affect the universal bar 33.
  • the spring 37 reciprocates the universal bar 33 through a forward stroke at a substantially reduced speed.
  • the lever 79 is moved by the cam 71, through the lever 72, the link 76, the lever 77 and the spring 81, at an invariable speed, independent of the number of the interponents 19 engaged by the bar 33.
  • the projection 83 of the lever 79 is now inserted on the path of the forward stroke of the lug 84 before the arrival of the lug 84, which is thus intercepted by the projection 83, whereby the bar 33 is arrested in the position of FIG. 5.
  • the type bars 7 corresponding to the interponents 19 engaged by the bar 33 do not reach the platen 6, whereby their overlapping is prevented. Furthermore, the stud 101 (FIG. 2) of the lever 39 does not reach the arm 99 of the bail 97, which remains thus with the tooth 96 under the lug 57 of the lever 58. The cycle of the cam 43 is now completed, but at the end thereof the latching member 95 is not rendered ineffective and the lever 58 is unable to engage the clutch 64, 69 at the depression of other keys, whereby the typewriter remains locked.
  • the force of impact of all the type actions may be simultaneously adjusted by altering the tension of the spring 37 within two extreme predetermined values.
  • the rearward end of the spring 37 is anchored to a lever 113 fulcrumed on a pivot 114 of a bail 115.
  • the lever 113 may be located in different positions by means of a positioning lever 116 manually operable in a known manner.
  • the lever 116 through a pin 117 cooperates with a toothed edge 118 of the lever 113.
  • said case shifting device comprises a bail 124 fulcrumed at 126 and connected by a pin 127 to a projection 128 of the type bar segment 9.
  • the bail 115 is pivoted on a shaft 121 and is provided with a projection 122 normally contacting a pin 123 of the bail 124. ⁇ Vhen the segment 9 is lowered in its upper case position in a manner known per se, the bail 124 is rocked counterclockwise and rocks the bail 115 clockwise.
  • lever 113 is now rocked counterclockwise about the pin 117, thus increasing the tension of the spring 37.
  • the actuator 33 and the element 83 are designed for enabling the actuator 33 to arrest the element 83 in the case the forward stroke is effected substantially at a predetermined speed and to be arrested by said element in the case said forward stroke is effected at a substantially reduced speed irrespective of the initial tension of the spring 37 within said extreme values.
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common reciprocable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common reciprocable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common reciprocable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common reciprocable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions each one comprising a movable intermediate element, a set of keys associated with said type actions, and a common reciprocable actuator for actuating said type actions through the proper intermediate element, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions each one comprising a movable intermediate element, a set of keys associated with said type actions, and a common reciprocable actuator for actuating said type actions through the proper intermediate element, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,
  • (It) means for mounting said actuator in such a manner as to cause said coupled interponent to be relatched by said latch at the end of said forward stroke in the case said actuator has not been intercepted;
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, and a common ICClPIO- cable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring
  • a power operated typewriter having a cyclically operating mechanism, a set of type actions, a set of keys associated with said type actions, a case shift device, and a common reciprocable actuator for said type actions, the combination comprising:
  • control means normally locking said actuator at rest against the urge of said spring, said control means being operable by said mechanism at the beginning of a machine cycle for conditioning said spring and at the end of said cycle for restoring said actuator,

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  • Mechanical Control Devices (AREA)
  • Common Mechanisms (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
US311709A 1962-09-28 1963-09-26 Spring actuated typewriter action with fault sensing means Expired - Lifetime US3151722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1898262 1962-09-28

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US3151722A true US3151722A (en) 1964-10-06

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US311709A Expired - Lifetime US3151722A (en) 1962-09-28 1963-09-26 Spring actuated typewriter action with fault sensing means

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US (1) US3151722A (fr)
CH (1) CH396050A (fr)
DE (1) DE1290555B (fr)
FR (1) FR1370336A (fr)
GB (1) GB1037816A (fr)
SE (1) SE315298B (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289806A (en) * 1964-02-29 1966-12-06 Manus George Control system for electric typewriters including current limiting means
US3295653A (en) * 1963-02-21 1967-01-03 Olivetti & Co Spa Interlocking device for electric typewriters
US3306417A (en) * 1964-05-04 1967-02-28 Olivetti & Co Spa Keyboard mechanism for generating code with selectable code member sets
US3349884A (en) * 1965-03-05 1967-10-31 Olivetti & Co Spa Fault sensing device for a springactuated typewriter
US3373857A (en) * 1966-03-29 1968-03-19 Litton Business Systems Inc Mechanism for power operating type actions both to and from the printing point
US3419123A (en) * 1966-04-06 1968-12-31 Willy Feiler Zahlund Rechenwer Portable electric typewriter
US3444979A (en) * 1965-06-09 1969-05-20 Olivetti & Co Spa Ribbon feeding device for a variable spacing typewriter
US3450245A (en) * 1965-06-09 1969-06-17 Olivetti & Co Spa Printing preventing device for predisposing the justification of the right margin in a typewriter
US3458024A (en) * 1967-09-18 1969-07-29 Ibm Typebar drive including reciprocating linear moving cyclic means
US3485336A (en) * 1967-11-09 1969-12-23 Varityper Corp Variable impression
DE1761720B1 (de) * 1968-06-28 1971-05-27 Olympia Werke Ag TYPENHEBELANTRIEBSVORRICHTUNG MIT EINER EINRICHTUNG ZUR EINZELJUSTIERUNG DER ABDRUCKSTAERKE EINES SCHRIFTZEICHENS AN SCHREIB UND AeHNLICHEN BUEROMASCHINEN
US3584722A (en) * 1967-10-14 1971-06-15 Olivetti & Co Spa Carbon ribbon vibrating device for a type bar typewriter
US3592312A (en) * 1968-08-14 1971-07-13 Olympia Werke Ag Type action drive
US3664478A (en) * 1969-09-16 1972-05-23 Olivetti & Co Spa Mutual locking device for an office machine with electric keyboard
US3677385A (en) * 1968-10-26 1972-07-18 Olivetti & Co Spa Automatic writing arrangements for accounting or calculating machines
US3827542A (en) * 1971-11-29 1974-08-06 Triumph Werke Nuernberg Ag Character storage arrangement for a powered typewriter action
US4027763A (en) * 1973-12-14 1977-06-07 Ing. C. Olivetti & C., S.P.A. Keyboard for office machines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1455112A (en) * 1922-07-25 1923-05-15 Addograph Co Typewriting machine
US2353860A (en) * 1942-11-26 1944-07-18 L C Smith & Corona Typewriters Typewriting machine
US2383256A (en) * 1943-07-03 1945-08-21 Royal Typewriter Co Inc Typewriting machine
US2403270A (en) * 1940-07-17 1946-07-02 Teletype Corp Projector for page printers
US3017978A (en) * 1960-12-15 1962-01-23 Royal Mcbee Corp Fault sensing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB210894A (en) * 1922-07-25 1924-02-14 Addograph Co Improvements in typewriting machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1455112A (en) * 1922-07-25 1923-05-15 Addograph Co Typewriting machine
US2403270A (en) * 1940-07-17 1946-07-02 Teletype Corp Projector for page printers
US2353860A (en) * 1942-11-26 1944-07-18 L C Smith & Corona Typewriters Typewriting machine
US2383256A (en) * 1943-07-03 1945-08-21 Royal Typewriter Co Inc Typewriting machine
US3017978A (en) * 1960-12-15 1962-01-23 Royal Mcbee Corp Fault sensing apparatus

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295653A (en) * 1963-02-21 1967-01-03 Olivetti & Co Spa Interlocking device for electric typewriters
US3289806A (en) * 1964-02-29 1966-12-06 Manus George Control system for electric typewriters including current limiting means
US3306417A (en) * 1964-05-04 1967-02-28 Olivetti & Co Spa Keyboard mechanism for generating code with selectable code member sets
US3349884A (en) * 1965-03-05 1967-10-31 Olivetti & Co Spa Fault sensing device for a springactuated typewriter
US3444979A (en) * 1965-06-09 1969-05-20 Olivetti & Co Spa Ribbon feeding device for a variable spacing typewriter
US3450245A (en) * 1965-06-09 1969-06-17 Olivetti & Co Spa Printing preventing device for predisposing the justification of the right margin in a typewriter
US3373857A (en) * 1966-03-29 1968-03-19 Litton Business Systems Inc Mechanism for power operating type actions both to and from the printing point
US3419123A (en) * 1966-04-06 1968-12-31 Willy Feiler Zahlund Rechenwer Portable electric typewriter
US3458024A (en) * 1967-09-18 1969-07-29 Ibm Typebar drive including reciprocating linear moving cyclic means
US3584722A (en) * 1967-10-14 1971-06-15 Olivetti & Co Spa Carbon ribbon vibrating device for a type bar typewriter
US3485336A (en) * 1967-11-09 1969-12-23 Varityper Corp Variable impression
DE1761720B1 (de) * 1968-06-28 1971-05-27 Olympia Werke Ag TYPENHEBELANTRIEBSVORRICHTUNG MIT EINER EINRICHTUNG ZUR EINZELJUSTIERUNG DER ABDRUCKSTAERKE EINES SCHRIFTZEICHENS AN SCHREIB UND AeHNLICHEN BUEROMASCHINEN
US3592312A (en) * 1968-08-14 1971-07-13 Olympia Werke Ag Type action drive
US3677385A (en) * 1968-10-26 1972-07-18 Olivetti & Co Spa Automatic writing arrangements for accounting or calculating machines
US3664478A (en) * 1969-09-16 1972-05-23 Olivetti & Co Spa Mutual locking device for an office machine with electric keyboard
US3827542A (en) * 1971-11-29 1974-08-06 Triumph Werke Nuernberg Ag Character storage arrangement for a powered typewriter action
US4027763A (en) * 1973-12-14 1977-06-07 Ing. C. Olivetti & C., S.P.A. Keyboard for office machines

Also Published As

Publication number Publication date
GB1037816A (en) 1966-08-03
CH396050A (it) 1965-07-31
SE315298B (fr) 1969-09-29
DE1290555B (de) 1969-03-13
FR1370336A (fr) 1964-08-21

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