US3738471A - Type head shifting apparatus - Google Patents

Type head shifting apparatus Download PDF

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Publication number
US3738471A
US3738471A US00119307A US3738471DA US3738471A US 3738471 A US3738471 A US 3738471A US 00119307 A US00119307 A US 00119307A US 3738471D A US3738471D A US 3738471DA US 3738471 A US3738471 A US 3738471A
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United States
Prior art keywords
type head
coupling
clutch
shaft
output
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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
Application number
US00119307A
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English (en)
Inventor
Van Der Werff Chien
D Hellebrandt
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.)
Olympia Werke AG
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Olympia Werke AG
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Filing date
Publication date
Priority claimed from DE19702010271 external-priority patent/DE2010271C/de
Application filed by Olympia Werke AG filed Critical Olympia Werke AG
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Publication of US3738471A publication Critical patent/US3738471A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J1/00—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies
    • B41J1/60—Typewriters or selective printing mechanisms characterised by the mounting, arrangement or disposition of the types or dies with types or dies on spherical, truncated-spherical, or like surfaces
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/24—Case-shift mechanisms; Fount-change arrangements

Definitions

  • ABSTRACT A type head has two substantially hemispherical surfaces, with lower case and upper case types, respectively, arranged in circular rows.
  • the lower case surface is normally in an operative position for printing
  • the shaft of the type head is normally connected with setting means for selecting a type for printing, but is turned by shifting means under the control of a shift key to turn the type head 180 to place the upper case surface in a position for printing, and to turn the type head 180 back to the normal position after a desired type has been selected by the setting means, and printed.
  • a clutch is operated by the shift key to connect either the setting means, or the shifting means, with the motor driven drive means of the typewriter.
  • the shifting of the type head is effected by a steel band, one end of which is connected with the type head carriage, while the other end of the same is connected to a disk secured to the type head shaft.
  • a spiral spring acts on the disk to continuously tension the steel band.
  • Another object of the invention is to return the type head between the upper case and the lower case position by cyclically operating means which cause a move.- ment of the type head 180 in accordance with a sine function so that the type head rotates at a reduced speed when stopped in the upper case position or lower case position.
  • the shaft of the type head has a first coupling half which is positively coupled with a second coupling half for turning movement between the two angularly spaced positions thereof.
  • the shifting means includes cyclically operating means which move the type head at a first gradually increase and then at a gradual decreased speed, in accordance with a sine function, to the respective upper case and lower case positions.
  • An embodiment of the invention comprises a type head and a type head shaft mounted on support means, such as a slide or carriage, for rotation about a type head axis.
  • the type head has an annular surface concentric with the axis, and composed of a first surface portion with first character types, and a second surface portion with second character types, preferably for .representing upper case characters, and lower case a first rotary output shaft.
  • the term positive is used in the present application to define a form-locked engagement or connection without transmission of force by springs.
  • Setting means are also driven by the drive means and have a second output shaft.
  • Clutch means are controlled by the cyclically operating means to move between a first coupling position for coupling the first output shaft with a type head shaft for rotating the type head from any one of the angular positions to the other angular position, and a second coupling position for coupling the second rotary output shaft for rotating the type head until a selected type on the surface portion in the operative position, is placed by the setting means in a printing position.
  • the type head is ac celerated and decelerated in accordance with a sine function, so that an inertia movement of the type head beyond the desired upper case or lower case position, is not possible, even if the type head is driven at high speed.
  • the type head shifting and setting apparatus can be constructed as a unit, which can be easily controlled by interposer code elements operated by keys.
  • FIG. 1 is a fragmentary perspective view illustrating a type head setting and shifting apparatus
  • FIG. 2 is an axial sectional view of the type head shifting apparatus shown in FIG. 1;
  • FIG. 3 is a fragmentary perspective, partly exploded view, illustrating the embodiment of FIG. 2;
  • FIG. 4 is a horizontal sectional view of the apparatus shown in FIGS. 1 and 3, illustrating particularly a type head shifting apparatus of the embodiment of FIGS. 1-3;
  • FIG. 5 is a partly schematic view, illustrating a cyclically operating means controlled by a shift key for shifting the type head of the embodiment of FIGS. 1 to 4 between angular positions in which lower case types and upper case types, respectively, are operative and located opposite the printing surface and
  • FIG. 5a is a perspective exploded view illustrating a transmission transforming rotary movement at constant speed into sinusoidal movement.
  • the type head shaft 9 is supported for rotation on the slide 1 1, as particularly shown in FIG. 2 in which a part of slide 11 is shown broken off.
  • type head shaft 9 carries a coupling pin 12 which is normally located in a cutout 13a of a coupling member 13 which is axially movable on shaft 9 and urged by a spring 19 to a position in which cutout 13a engages coupling pin 12.
  • a gear 15 is secured to coupling part 13, and can move with the same in axial direction.
  • Coupling part 13 and gear 15, which is the output means of the setting means, which are not an object of the present invention, is connected with shaft 9 for rotation so that any type of the type head 7 can be selected by turning the type head 7 to a position in which the respective type is located opposite platen 4, and is printed when shaft 9 and type head 7 are moved with slide 11 towards the platen 4.
  • a shaft 68 mounted in a portion 47 of carriage 5, has a coupling part 17 with a coupling cutout 18, also cooperating with coupling pin 12.
  • Coupling part 17 forms an annular shoulder 17a which is slidingly engaged by a pair of pins 55a diametrically arranged on a pair of prongs 55b of the forked end of a cam follower lever 55.
  • Lever 55 has a follower portion 57 cooperating with rotary cam means 53, best seen in FIGS. 2 and 3.
  • shaft 68 The lower end of shaft 68 cooperates with a spring 69 which urges shaft 68 together with coupling part 17 downward so that cam follower lever 55 with cam follower 57 is urged into engagement with cam 53.
  • Shaft 68 has an elongated pinion portion 67.
  • gear setting means of the typewriter turn output gear 15 together with type head shaft 9 and type head 7 to a position in which a selected type is located opposite the platen 4. If type head 7 is in a position turned 180, so that the hemispherical surface 7E with the upper case types is located opposite the platen 4, an upper case character is selected for printing, and it will be understood that upper and lower case characters appearing in the usual manner on the same typewriter key, are placed in corresponding positions on surfaces 7e and 7E of the type head 7.
  • a drive gear 23 is mounted on carriage 5 and has a central opening engaging a non-circular continuously driven drive shaft 3 so that gear 23 is rotated irrespective of the displacement of carriage 5 with type head- 7 along platen 4.
  • Gear 23 drives another gear 25 which meshes with the gear 27 connected by shaft 29 with a gear 31 meshing with a gear 33.
  • FIG. 4 shows parts of the type head setting apparatus of my above-mentioned co-pending application, without reference numerals, which have been applied in FIG. 4 and FIG. 3 only to parts which are relevant to the present invention.
  • a setting gear segment 21 meshes with output gear 15 of the setting means.
  • the drive gear 33 is fixedly secured to a cylindrical bushing 35 which is rotatable on a shaft 41.
  • Shaft 41 is fixedly secured to another cylindrical bushing 43 which can be coupled by a coil spring 39 with a cylindrical bushing 35.
  • Pin 43a secures bushing 43 to shaft 41.
  • Parts 35, 39, 43 form a shift clutch 60.
  • Clutch spring 39 which extends over the cylindrical surfaces of bushings 35 and 43, is normally-held by a member 36, to which one endof a spring 39 is secured, in a spread condition so that shaft 41 is not coupled with drive gear 33 and bushing 35.
  • a projection 37 of part 36 is held by a latch 83 whose end portion 85 engages projection 37, so that the spring 39 is spread and has a larger diameter than the cylindrical surfaces of bushings 35 and 43.
  • a shift key means includes the shift key 73 and a key lever 71 mounted on a pivot 75 for angular movement, and normally abutting the schematically shown stop 93 of the typewriter frame due to the action of a spring 91.
  • Lever 71 has a actuating projection 77 near a pivot pin 75 which cooperates with a normally open switch 79. The arrangement is such that during depressure of shift key 73, projection 77 engages one contact of switch 79, and momentarily closes switch 79 before assuming the position 7 7a shown in chain lines.
  • Rotary member 49 has diametrically arranged cam means 53 which are engaged by the cam follower means 55, 57 due to theaction of spring 69, as explained above.
  • Cam follower lever 55 is mounted on a pivot means 56 secured to carriage 5, as best seen in FIG. 2.
  • a pin 59 is secured to the member 49, and engages a slot 63 in a rack member 61, best seen in FIGS. 2 and 5.
  • Rack member 61 is mounted in guide means 47b formed in the support portion 47 of carriage 5.
  • Rack bar 65 meshes with the gear portion 67 of shaft 68, which constitutes the output means of the setting means 41,60,51,49,59,6l,63,65.
  • shift key 73 is operated, and moves through an actuating position, engaging and closing switch 79 to a depressed position, in which it may be manually held.
  • latch 83,85 is operated by electromagnet means 81, projecting 37 is released, and shift clutch 60 is engaged so that the rotary transmission member 49 with the pin 59 rotates, causing movement of rack member 61 in accordance with a sine function. Since rack 65 meshes with the output gear 67, the same is rotated an angle of 180 at a speed which follows the same sine function.
  • the angular movement of the output means 67,68, in accordance with the sine function, is transmitted to the type head shaft 9, and to the type head, so that the same is turned 180 while it is gradually accelerated and decelerated. Due to the deceleration before arriving at the new position in which the hemispherical surface 7E confronts platen 4, the type head stops exactly in the correct upper case position, without being driven by inertia beyond the correct position.
  • Output shaft 67,68 stops, and the low portion 53a between two cam means 53 is engaged by cam follower 57 of cam follower lever 55, so that spring 69 retracts output means 67, 68 and coupling part 17, permitting coupling part 13 to be moved by spring 19 to a coupled position in which cutout 13a engages pin 13, and the setting means, including output gear 15, can be operated in a manner which is not an object of the invention, to place a selected type in the printing position by rotating the type head means 7,9.
  • the transmission ratio between the pinion 59 and the inner gear 49a of rotary member 49 is 2:1, which means that the shift clutch 60 must be twice actuated while the rotary member 49 of the cyclically operating means 49a,49,57,59,63,61,65 performs one complete revolution.
  • Type head shifting apparatus comprising a support means; type head means mounted on said support means and including a type head and a type head shaft mounted on said support means for rotation about an axis, said type head having an annular surface concentrio with said axis and having a first surface portion with first character types and a second surface portion with second character types, .and first and second character types being disposed along at least one circular line concentric with said axis, said type head means having first and second angular positions in which said first and second surface portions, respectively, are in operative positions for printing; drive means; shifting means including a shift key means, and cyclically operating means connectable with said drive means under the control of said shift key means, said cyclically operating means including a rotary member having an excentric pin, and having a first rotary output means including an output gear; shift clutch means operable by said shift key means to connect said drive means with said rotary member for rotation so that said pin moves along along a circular path; a rack member guided for straight movement and having a slot receiving said pin
  • first and second surface portions are first and second surface halves; wherein said first and second angular positions are spaced 180; and wherein said first output means rotate said type head shaft and said type head 180 in one direction under the control of said cyclically operating means when said shift key means is actuated.
  • said shift key means includes a key lever and a spring urging said key lever to a normal position of rest; wherein said key lever is manually operable for moving said key lever through an actuating position to a depressed position; wherein said key lever in said actuating position actuates said cyclically operating means to turn said type head means from said lower case position to said upper case position; and wherein said key lever when returned by said spring to said normal position of rest, moves again through said actuating position and actuates said cyclically operating means to turn said type head means 180 back to said normal lower case position.
  • said shift clutch has an engaged position connecting said drive means with said cyclically operating means and said first output means, and a normal disengaged position; electromagnetic means for placing said shift clutch in said engaged position, when energized; and switch means closed by said key lever when passing through said actuating position and connected with said electr0- magnetic means for energizing the same.
  • said cyclically operating means includes cam means connected with said rotary member for rotation; and cam follower means connected with said clutch means and operated by said cam means to move said clutch means to said first coupling position before said rack member turns said output gear.
  • rotary member has an inner gear ring; wherein said drive means include a drive gear, a clutch shaft connected by said shift clutch in said engaged position with said drive gear, and a pinion secured to said clutch shaft and meshing with said inner gear.
  • said clutch means include a clutch pin on said type head shaft; wherein said second output means of said setting means has a first coupling part forming part of said clutch means and being movably mounted on said type head shaft, said first coupling part having a first coupling cutout; wherein said clutch means further include a spring urging said first coupling part to said second coupling position in which said clutch pin is located in said first coupling cutout, wherein said first rotary output means of said shifting means has another coupling part having a second coupling cutout and forming part of said clutch means; and wherein said cam follower means move said other coupling part to said first coupling position in which said clutch pin is located in said second coupling recess, and outside of said first coupling recess.
  • said first output means is an output shaft coaxial with said type head shaft and having a portion forming said output gear; wherein said output shaft moves axially with said first coupling part to said first coupling position; and wherein said output gear is longer in axial direction than the corresponding dimension of said rack member so as to remain meshing engagement meshingengagement with the same during axial movement of said output shaft.
  • Apparatus as claimed in claim 1 comprising a platen; wherein said support means include a carriage movable in a writing direction along said platen, and a slide mounted on said carriage for movement transverse to said writing direction toward said platen; wherein said type head shaft is supported on said slide for rotation about said type head axis, and for movement with the same toward said platen; wherein said shifting means are mounted on said carriage; and wherein said type head shaft and said setting means are mounted on said slide for movement with the same in said second coupling position of said clutch means so that said selected type in said printing position is moved toward said platen for making an imprint.
  • Type head shifting apparatus comprising a support means; type head means mounted on said support means and including a type head and a type head shaft mounted on said support means for rotation about an axis, said type head having an annular surface concentric with said axis and having a first surface portion with first character types, and a second surface with second character types, said first and second character types being disposed along at least one circular line concentric with said axis, said type head means having first and second angular positions in which said first and second surface portions, respectively, are in operative positions for printing; drive means; shifting means including a shift key means, cyclically operating means connectable with said drive means under the control of said shift key means and having a first rotary output means, and a transmission including positively engaged movable members for accelerating and decelerating said first rotary output means in a sinusoidal movement so that said type head is gradually accelerated and decelerated when turning from one of said angular positions to the other angular position; setting means driven by said drive means and having a second output means;
  • Type head shifting apparatus comprising a support means; type head means mounted on said support means and including a type head and a type head shaft mounted on said support means for rotation about an axis, said type head having an annular surface concentric with said axis and having a first surface portion with first character types, and a second surface with second character types, said first and second character types being disposed along at least one circular line concentric with said axis, said type head means having first and second angular positions in which said first and second surface portions, respectively, are in operative positions for printing; drive means, shifting means including a shift key means, cyclically operating means connectable with said drive means under the control of said shift key means and having a first rotary output means, and a transmission including a rotary eccentric first member rotatable by said drive means, a second member positively connected and driven by said first member along a straight path, said first output means including a rotary third member positively connected with said second member for being accelerated and decelerated in a sinusoidal movement, said shifting'means further

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US00119307A 1970-03-05 1971-02-26 Type head shifting apparatus Expired - Lifetime US3738471A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702010271 DE2010271C (de) 1970-03-05 Vorrichtung zum Umschalten eines Druckkopfes für Schreib- und Druckwerke

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US3738471A true US3738471A (en) 1973-06-12

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US00119307A Expired - Lifetime US3738471A (en) 1970-03-05 1971-02-26 Type head shifting apparatus

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JP (1) JPS5117091B1 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833107A (en) * 1971-11-13 1974-09-03 Ricoh Kk Typewriter
US3876053A (en) * 1972-01-13 1975-04-08 Olivetti & Co Spa Serial printing device
USB535391I5 (enrdf_load_stackoverflow) * 1974-12-23 1976-01-27
US3948381A (en) * 1974-12-23 1976-04-06 International Business Machines Corporation Printer with non return to home rack shift selection mechanism
US3957151A (en) * 1973-03-24 1976-05-18 Casio Computer Co., Ltd. Character printing device
US4006463A (en) * 1974-04-29 1977-02-01 Mobil Oil Corporation Computer-print device code converter
US4039067A (en) * 1973-03-24 1977-08-02 Casio Computer Co., Ltd. Character printing device
US4225252A (en) * 1977-03-25 1980-09-30 Silver Seiko Co., Ltd. Character selection for single element printer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6214565U (enrdf_load_stackoverflow) * 1985-07-12 1987-01-28

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895584A (en) * 1955-11-17 1959-07-21 Ibm Single element printing head
US2919002A (en) * 1957-04-19 1959-12-29 Ibm Selection mechanism for a single printing element typewriter
US3382963A (en) * 1966-08-17 1968-05-14 Ibm Printing apparatus with no-print feature
US3414103A (en) * 1966-03-31 1968-12-03 Epsco Inc Signal responsive and signal generating means for single element print head typewriter
US3524527A (en) * 1967-11-22 1970-08-18 Ibm Alternate character selection mechanism for typewriters
US3666070A (en) * 1970-06-29 1972-05-30 Ibm Differential mechanism for positioning a type character on a type element

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895584A (en) * 1955-11-17 1959-07-21 Ibm Single element printing head
US2919002A (en) * 1957-04-19 1959-12-29 Ibm Selection mechanism for a single printing element typewriter
US3414103A (en) * 1966-03-31 1968-12-03 Epsco Inc Signal responsive and signal generating means for single element print head typewriter
US3382963A (en) * 1966-08-17 1968-05-14 Ibm Printing apparatus with no-print feature
US3524527A (en) * 1967-11-22 1970-08-18 Ibm Alternate character selection mechanism for typewriters
US3666070A (en) * 1970-06-29 1972-05-30 Ibm Differential mechanism for positioning a type character on a type element

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833107A (en) * 1971-11-13 1974-09-03 Ricoh Kk Typewriter
US3876053A (en) * 1972-01-13 1975-04-08 Olivetti & Co Spa Serial printing device
US3957151A (en) * 1973-03-24 1976-05-18 Casio Computer Co., Ltd. Character printing device
US4039067A (en) * 1973-03-24 1977-08-02 Casio Computer Co., Ltd. Character printing device
US4006463A (en) * 1974-04-29 1977-02-01 Mobil Oil Corporation Computer-print device code converter
USB535391I5 (enrdf_load_stackoverflow) * 1974-12-23 1976-01-27
US3948381A (en) * 1974-12-23 1976-04-06 International Business Machines Corporation Printer with non return to home rack shift selection mechanism
US3981386A (en) * 1974-12-23 1976-09-21 International Business Machines Corporation Non return to home rack shift selection mechanism for a single element printer
US4225252A (en) * 1977-03-25 1980-09-30 Silver Seiko Co., Ltd. Character selection for single element printer

Also Published As

Publication number Publication date
DE2010271A1 (de) 1971-09-09
JPS5117091B1 (enrdf_load_stackoverflow) 1976-05-31
DE2010271B2 (de) 1972-08-31

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