US3365723A - Setting apparatus for recording instrument - Google Patents

Setting apparatus for recording instrument Download PDF

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Publication number
US3365723A
US3365723A US517888A US51788865A US3365723A US 3365723 A US3365723 A US 3365723A US 517888 A US517888 A US 517888A US 51788865 A US51788865 A US 51788865A US 3365723 A US3365723 A US 3365723A
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US
United States
Prior art keywords
gear
carrier
rotation
setting
time indicating
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
US517888A
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English (en)
Inventor
Spormann Horst
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.)
Digital Kienzle Computersysteme GmbH and Co KG
Original Assignee
Kienzle Apparate GmbH
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 Kienzle Apparate GmbH filed Critical Kienzle Apparate GmbH
Application granted granted Critical
Publication of US3365723A publication Critical patent/US3365723A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B1/00—Driving mechanisms
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B33/00—Calibers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C7/00—Details or accessories common to the registering or indicating apparatus of groups G07C3/00 and G07C5/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19623—Backlash take-up

Definitions

  • the present invention relates to a setting apparatus for a recording instrument, and more particularly to an arrangement for preventing relative movement between the diagram carrier of a recording instrument and time indicating pointers provided in the instrument.
  • Recording instruments are known in which not only a diagram carrier, such as a record carrier tape or a circular diagram disc, but also time indicating pointers are driven by a clock motor.
  • the time indicating pointers and the diagram carrier are driven in synchronism, and can be simultaneously set to any selected position.
  • setting of the time indicating pointers to the correct time effects simultaneously the setting of the diagram carrier to the same time.
  • Manually controlled setting means include a gear cooperating with a gear of the gear train connecting the diagram carrier with the time indicating pointers.
  • the respective gear of the gear train is neither the first, nor the last gear of the gear train, so that during a setting operation in one or the other direction of rotation, play between the gears is produced so that after setting of the time indicating pointers and of the diagram carrier, a relative angular displacement between the diagram carrier and the time indicating pointers for the amount of the play occurs, and exact synchronism between the diagram carrier and the time indicating pointers during a following drive by the clock motor is no longer assured.
  • a small spring accumulator is provided in the recording instruments of the prior art, which is tensioned while the clock motor drives the instrument, and eliminates the play in one direction of rotation after a setting operation.
  • the known setting arrangements have the disadvantage that the spring accumulator is tensioned in the direction of rotation in which the clock motor drives the instrument. If the instrument, and more particularly the time indicating pointers are set in a direction opposite to the direction of rotation in which the clock motor drives the time indicating pointers and the diagram carrier, the setting operation releases the spring accumulator so that the same cannot perform its function after the setting of the instrument to a different time.
  • the known setting apparatus is designed so that the setting takes place substantially only in one direction of rotation, whereas setting in the opposite direction of rotation is blocked, except for a very small angle.
  • setting in only one direction is extremely inconvenient in certain positions of the time indicating pointers since it requires many turns of the minute pointer. For example, if the pointers indicate 12:10 hours, and are to be set to :00 hours, the minute pointer must be turned almost ten revolutions in the forward direction of rotation, whereas only a very 3,355,723 Patented Jan. 23, 1958 inn small angle would be required for setting in the opposite direction.
  • Another object of the invention is to provide a setting apparatus in which any play introduced by a setting operation is eliminated before the clock motor starts to turn the instrument after the setting operation.
  • Another object of the invention is to connect the diagram carrier and the time indicating means by an endless gear train including a pretensioned torque accumulator which is pretensioned in a direction opposite to the direction of rotation in which the clockwork normally drives the diagram carrier and the time indicating means.
  • the present invention relates to a setting apparatus for a recording instrument, and more particularly to a recording instrument of the type having time indicating means, such as minute and hour hands, and diagram carrier means which may include a record carrier and a support for the same.
  • an endless gear train connects a setting gear with the diagram carier means and the time indicating means for rotation, and a clock motor drives the carrier means and the time indicating means in one direction of rotation during the normal operation of the recording instrument.
  • the endless gear train includes two gear train portions connecting the carrier means and the time indicating with each other.
  • One gear means of one of the gear,train portions includes a torque accumulator pretensioned in a direction of rotation opposite to the normal forward direction of rotation of the gear means during a recording operation of the instrument.
  • a setting means including a gear meshing with a gear means of the gear train, preferably of the respective other gear train portion, is provided for turning the diagram carrier means and the time indicating means in opposite directions of rotation whereby play in forward direction is introduced into the gear train when the instrument is set in a direction opposite to the normal forward direction of rotation.
  • the pretensioned torque accumulator moves the gear means of the endless gear train to a position eliminating the play in the same in the forward direction of rotation so that the clock motor then drives the diagram carrier means and the time indicating means without relative angular displacement.
  • two coaxial gears are connected by a pretensioned torsion spring constituting the torque accumulator and urging the two coaxial gears to turn in opposite directions.
  • One of the coaxial gears meshes with a time gear of the gear train connected to the minute hand of the time indicating means.
  • FIG. 1 is an elevation, partially in section, illustrating one embodiment of the invention
  • FIG. 2 is a schematic, partly exploded plan view illustrating the embodiment of FIG. 1;
  • FIG. 3 is a sectional view illustrating a spring torque accumulator used in the embodiment of FIGS. 1 and 2.
  • a clock motor 3 including a housing and a gear ring 1 secured to the housing, and a spiral spring, not shown, secured to the housing and to a fixed core, is mounted between a pair of supporting walls 1 and 2.
  • Gear ring 4 meshes with a gear 5 connected with a pinion 6 and mounted with the same on walls 1 and 2.
  • Gear 6 meshes with a carrier gear including a gear ring 7 and a hub portion 8 mounted on a shaft 9 for turning movement.
  • Gear ring 7 meshes with a pinion 111 secured to another gear 11 which is operatively connected with an escapement mechanism, not shown, controlling the uniform running of clock motor 3.
  • Gears 10 and 11 are also mounted on walls 1 and 2.
  • a dished friction spring 12 is secured to hub portion 8, and abuts a carrier gear 13 which is rotatable on shaft 9 and has a circular portion 13 for supporting a diagram sheet provided with a central hole into which a stud 14 secured to diagram carrier means 13, 13' projects. Consequently, the diagram sheet rotates with carrier gear 13' when the same is rotated by clock motor 3 in one direction of rotation indicated by solid line arrows in FIG. 2.
  • friction coupling 12, 13' permits relative angular movement between the carrier gear 13, and gear means 8, 7 driven by clock motor 3.
  • Two shafts 16 and 16' are mounted on walls 1 and 2, and respectively carry gear means 15, meshing with carrier gear means 13 and gears 17 and 17'.
  • Gears 15, 15', and gears 17, 17 have the same diameter and number of teeth.
  • Gear 17 meshes with a setting gear 28 secured to a knurled knob 27 which is manually operated to turn setting gear 28 in one or the other direction of rotation, as desired.
  • Gear 17 meshes with a gear 18 secured to a gear 19, the two gears having a common hub mounted for free rotation on the shaft of the gear means 6, 5.
  • Gear 19 meshes with a pinion 20 secured to a shaft 21 carrying a minute hand
  • gear 18 meshes with a gear 22 integral with the hollow shaft 23 carrying an hour hand.
  • the time indicating means 21, 23 move the pointers over a dial, not shown, so that the time is indicated.
  • Gear 17' meshes with a gear 18' which is mounted on a shaft for turning movement, and is coaxial with another gear 19' mounted on the same shaft for free turning movement.
  • a torsion spring 24 has two bent end portions respectively projecting into axial bores of gears 18' and 19, as best seen in FIG. 3. Spring 24 is pretensioned and urges gears 18' and 19' to turn in opposite directions relative to each other.
  • Gear 18 meshes with gear 17', and gear 19 meshes with gear 20 in such relative angular position that the spring torque accumulator 24 is pretensioned. Such pretension is obtained by turning gears '18 and 19' in opposite directions before placing gears 18' and 19' in meshing engagement with gears 17' and 20.
  • an endless gear train including carrier gear means 13, gear means 15, 17, 18, 19 time gear means 20, gear means 19', 18' with torque accumulator 24, and gear means 17', 15' is provided for connecting the carrier gear means 13' with the time gear means 20. More particularly, the endless gear train includes a first gear train portion 15', 17', 18, 24, 19, and a second gear train portion 15, 17, 18, 19, both gear train portions connecting the carrier gear means 13 with the time gear means 20.
  • Torque accumulator 24 is provided in the first gear train portion, and setting gear is connected to the second gear train portion.
  • the driving torque of clock motor 3 is transmitted over gears 4, 5, 6, 7, 8 and. friction coupling 12 to carrier gear 13 and the diagram sheet support 13.
  • the driving torque is further transmitted over the two parallel gear train portions to the time gear 219 of the time indicating means 23. Consequently, gear means 15, 17, 18, 19 rotate in synchronism with the gear means 15, 17, 18 and 19.
  • gear 19' is driven by gear 1-8, but only to the extent permitted by the simultaneous drive of the time gear 20 by gear means 15, 17, 18, 1?. Due to the drive of gear 18 by gear 17, and the meshing engagement between gear 19 with gear 20 the tension of spring 24 is always maintained.
  • time indicating means 23, 21 are to be set in the opposite direction, and setting gear 23 turns all gears of the gear train, and particularly time gear 20 in a direction of rotation opposite to the normal direction of rotation of the gears when driven by the clock motor 3, as indicated by broken line arrows in FIG. 2, play is introduced into the gear train while the flanks of the gear teeth which performed a driving function are now driven, and the driven gear flanks perform a driving function.
  • the gears turn relative to each other as far as permitted by the unavoidable play between the gears.
  • the play must be eliminated before the clock motor 3 starts to drive the gear train after the setting operation.
  • carrier gear means 13 and time gear means 20 must start at exactly the same moment.
  • torsion spring 24 which is pretensioned in a direction of rotation opposite to the normal direction of rotation produced by clock motor 3.
  • spring 24 turns gear 19' to eliminate the play between time gear 29 and gear 19, and also the play of the following gears, while gear 18 is turned to eliminate the play between gears 15 and 13'.
  • the tooth flanks which engage each other during forward rotation again abut each other.
  • Setting apparatus for a recording instrument comprising, in combination, a clock motor, diagram carrier means; time indicating means, one of said means being driven by said clock motor in one direction of rotation; a setting gear; an endless gear train including a plurality of meshing gear means and connecting said setting gear, said diagram carrier means, and said time indicating means for rotation so that said clock motor drives said gear means with said carrier means and said time indicating means in said one direction of rotation, and so that said setting gear is adapted to turn said carrier means and said time indicating means in opposite directions of rotation, said endless gear train including two gear train portions connecting said carrier means and said time indicating means with each other, one gear means of one of said gear train portions including a torque accumulator pretensioned in a direction opposite to said one direction of rotation whereby if play in said one direction of rotation is introduced into said gear train by setting of said time indicating means by said setting gear in a direction opposite to said one direction of rotation, said gear means are turned by said torque accumulator to a position eliminating the play in said gear train so that
  • gear means are gears; wherein said one gear means includes two gears meshing with other gears of said gear train; and wherein said torque accumulator connects said two gears and is pretensioned to urge said two gears to turn in opposite directions.
  • gear means are gears; wherein said one gear means includes two gears meshing with other gears of said gear train; and wherein said torque accumulator is pretensioned torsion spring secured to said two gears to urge said two gears to turn in opposite directions.
  • said gear train includes a carrier gear means secured to said carrier means and a time gear means secured to said time indicating means; wherein said motor drives said carrier gear means; and wherein said one gear means which includes said torque accumulator meshes with said time gear means.
  • said gear train includes a carrier gear means secured to said carrier means and a time gear means secured to said time indicating means; wherein said motor drives said carrier gear means; wherein said one gear means which includes said torque accumulator meshes with said time gear means; and wherein said setting gear meshes with a gear means of the other gear train portion.
  • said gear train includes a carrier means secured to said carrier means and a time gear means secured to said time indicating means; and including a friction coupling and transmission means connecting said clock motor with said carrier gear means so that said carrier means is driven from said clock motor.
  • gear means are gears; and wherein said one gear means includes two coaxial gears meshing with other gears of said gear train; and wherein said torque accumulator is a spring means secured to said coaxial gears and pretensioned to urge the same to turn in opposite directions.
  • said gear means are gears; wherein said one gear means includes two coaxial gears meshing with other gears of said gear train; wherein said torque accumulator is a spring means secured to said coaxial gears and pretensioned to urge the same to turn in opposite directions; wherein said gear train includes a carrier gear secured to said carrier means and a time gear secured to said time indicating; wherein said motor drives said carrier gear; and wherein one of said coaxial gears meshes with said time gear.
  • said gear means are gears; wherein said one gear means includes two coaxial gears meshing with other gears of said gear train; wherein said torque accumulator is a spring means secured to said coaxial gears and pretensioned to urge the same to turn in opposite directions; wherein said gear train includes a carrier gear secured to said carrier means and a time gear secured to said time indicating means; wherein said motor drives said carrier gear; wherein one of said coaxial gears meshes with said time gear; and wherein said setting gear meshes with a gear of the other gear train portion; and including a friction coupling connecting said motor with said carrier gear.
  • said gear train includes a carrier gear means secured to said carrier means for rotation therewith and a time gear means secured to said time indicating means for rotation therewith; wherein said one gear means includes two coaxial gears and a torque accumulator spring secured to the same and urging the same to turn in opposite directions; wherein one of said coaxial gears meshes with said time gear means; wherein said one coaxial gear has the same diameter as a gear means of the other gear train portion meshing with said time gear means; wherein two gear means of said two gear train portions, respectively, mesh with said carrier gear means and have the same diameter, and wherein each remaining gear means of said one gear train portion has the same diameter as a corresponding gear means of the other gear train portion.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gear Transmission (AREA)
  • Micromachines (AREA)
US517888A 1964-12-28 1965-12-27 Setting apparatus for recording instrument Expired - Lifetime US3365723A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0054887 1964-12-28

Publications (1)

Publication Number Publication Date
US3365723A true US3365723A (en) 1968-01-23

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US517888A Expired - Lifetime US3365723A (en) 1964-12-28 1965-12-27 Setting apparatus for recording instrument

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US (1) US3365723A (xx)
FR (1) FR1461117A (xx)
GB (1) GB1076960A (xx)
SE (1) SE302374B (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945258A (en) * 1973-06-28 1976-03-23 Kabushiki Kaisha Mitutoyo Seisakusho Dial gauge measuring the length in two different units
US4105106A (en) * 1974-06-15 1978-08-08 Adlerwerke Vorm. Heinrich Kleyer A.G. Typewriter platen clutch mechanism
US4247931A (en) * 1977-06-14 1981-01-27 Seiko Koki Kabushiki Kaisha Slip mechanism for a timepiece
US4640147A (en) * 1984-06-12 1987-02-03 Toyota Jidosha Kabushiki Kaisha Gear assembly adapted for mating with a third gear without backlash
US4803891A (en) * 1987-03-12 1989-02-14 Takashi Takahashi Transmission for controlled equipment
US5257543A (en) * 1992-09-03 1993-11-02 Borg-Warner Automotive, Inc. Gear transmission with an anti-rattle system
US5355742A (en) * 1992-07-09 1994-10-18 Heidelberger Druckmaschinen Ag Device for avoiding flank blacklash in gear trains
US5456543A (en) * 1992-05-01 1995-10-10 Hewlett-Packard Company Printer motor drive with backlash control system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448358C2 (de) * 1974-10-10 1982-12-09 Moto Meter Gmbh, 7250 Leonberg Vorrichtung zur Beseitigung des beim Einstellen von Zeitlaufwerken, insbesondere in Fahrtschreibern, entstehenden Zahnspiels

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679167A (en) * 1951-12-04 1954-05-25 Kollsman Instr Corp Antibacklash device
US3105731A (en) * 1958-07-07 1963-10-01 Kienzle Apparate Gmbh Setting arrangement for interconnected indicators

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679167A (en) * 1951-12-04 1954-05-25 Kollsman Instr Corp Antibacklash device
US3105731A (en) * 1958-07-07 1963-10-01 Kienzle Apparate Gmbh Setting arrangement for interconnected indicators

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945258A (en) * 1973-06-28 1976-03-23 Kabushiki Kaisha Mitutoyo Seisakusho Dial gauge measuring the length in two different units
US4105106A (en) * 1974-06-15 1978-08-08 Adlerwerke Vorm. Heinrich Kleyer A.G. Typewriter platen clutch mechanism
US4247931A (en) * 1977-06-14 1981-01-27 Seiko Koki Kabushiki Kaisha Slip mechanism for a timepiece
US4640147A (en) * 1984-06-12 1987-02-03 Toyota Jidosha Kabushiki Kaisha Gear assembly adapted for mating with a third gear without backlash
US4803891A (en) * 1987-03-12 1989-02-14 Takashi Takahashi Transmission for controlled equipment
US5456543A (en) * 1992-05-01 1995-10-10 Hewlett-Packard Company Printer motor drive with backlash control system
US5355742A (en) * 1992-07-09 1994-10-18 Heidelberger Druckmaschinen Ag Device for avoiding flank blacklash in gear trains
US5257543A (en) * 1992-09-03 1993-11-02 Borg-Warner Automotive, Inc. Gear transmission with an anti-rattle system

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Publication number Publication date
FR1461117A (fr) 1966-12-02
SE302374B (xx) 1968-07-15
GB1076960A (en) 1967-07-26

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