US3731481A - Time-setting device for electric timepiece - Google Patents

Time-setting device for electric timepiece Download PDF

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Publication number
US3731481A
US3731481A US00237680A US3731481DA US3731481A US 3731481 A US3731481 A US 3731481A US 00237680 A US00237680 A US 00237680A US 3731481D A US3731481D A US 3731481DA US 3731481 A US3731481 A US 3731481A
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US
United States
Prior art keywords
arbor
seconds
hand
gear
pinion
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
US00237680A
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English (en)
Inventor
Y Nakayama
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Application granted granted Critical
Publication of US3731481A publication Critical patent/US3731481A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B27/001—Internal gear therefor, e.g. for setting the second hand or for setting several clockworks
    • 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
    • G04B27/004—Mechanical devices for setting the time indicating means having several simultaneous functions, e.g. stopping or starting the clockwork or the hands

Definitions

  • This invention relates to improvements in and relating to a time-setting mechanism in an electronic timepiece fitted with a seconds-hand locking device.
  • the object of the present invention is therefore to provide an improved time-setting mechanism for an electronic timepiece, especially a watch, which mechanism is capable of obviating the above-mentioned several drawbacks in conventional time-piece movements.
  • the main object of the invention is to provide a highly improved time-setting mechanism of the above nature, capable of obviating the adverse reaction effect transmitted from the watch hand through the gear train back to the electronically operated prime mover of the timepiece movement, especially when the seconds-hand arbor is not fitted with larger gear or gears; the invention enables the seconds hand to start practically instantly upon performing a time-setting or seconds-hand locking job, in addition with the benefit that all the time display hands are kept in their mutual specifically set position upon performing the seconds-hand locking operation.
  • the seconds-hand arbor is provided with a clutch and a locking cam, said clutch being adapted for on-off control of a seconds-hand pinion relative to said arbor.
  • FIG. 1 shows a schematic sectional view of a first embodiment.
  • FIG. 3 is a perspective view of a clutch spring employed in FIG. 1.
  • numeral 1 denotes a seconds-hand arbor to which a clutch spring 2, and a control cam 3 are fixedly attached.
  • a first second-hand pinion 4 is fixedly attached to the arbor as conventionally.
  • Numeral 5 represents a second seconds-hand pinion which is freely rotatably mounted on the arbor l and made somewhat larger than the first one, so as to accommodate a central bore for allowing its attachment to said arbor in the present embodiment.
  • Numeral 6 represents a second third gear which is kept in meshing with a conventional fourth gear 8 and mounted freely rotatably on a conventional third gear arbor 7, said fourth gear 8 being operatingly connected through other gears (not shown) with a prime mover, (also not shown,) of the timepiece movement, for receiving driving torque therefrom in a known manner.
  • Numeral 10 represents a set member mounting the second third gear 6 and made integral for unitary rotation therewith.
  • numeral 11 represents an apertured jewel fixedly attached to the seat member 10, although in the drawing a gap is shown therebetween for purposes of clarity.
  • Numeral 14 represents a conventional second gear of the gear train which is kept in gear meshing with third pinion l3 and thus kept in cooperation with the gear train.
  • Numeral 15 represents a springy stop lever, the root end of which is attached fixedly by means of a set screw 22 to a second stationary plate member 23, only partially shown, of the timepiece movement, and formed with an inclined portion 16.
  • this stop lever 15 is forcibly flexed downwards in FIG. 1- by pressure engagement with a control lever 17 in case of a timesetting operation or of a seconds-hand locking operation, the tip or inward end of the lever 15 is brought into engagement with the clutch spring 2.
  • the control lever 17 which is shown only in its cross-section for simplicity is adapted for movement from .its idle position shown to its working position at which the control lever is brought into pressure contact with the inclined portion 16 of the lever 15.
  • the wearer of the timepiece or the watch may manipulate an outside operating member, preferably a conventional winding stem or the like, so as to shift the control lever 17 to-and-fro along the underside of said plate member 23 and between its idle and working position at will.
  • an outside operating member preferably a conventional winding stem or the like
  • the clutch spring 2 has been shown and described as fixedly attached to the arbor 1, the invention is not limited to any suitable specific structure only. Thus, it suffices to employ such structure by which the second seconds-hand pinion can be separated in its operation from the arbor 1 when so desired, as will be described in greater detail hereinafter.
  • the clutch spring 2 is shown in its substantially enlarged perspective view.
  • the clutch spring 2 when mounted in position as shown in FIG. 1 is so designed and arranged that when an axially directed pressure is applied on an upwardly and axially extending projection 2a as shown by an arrow a a second or peripheral projection 2b is flexed axially, but in the opposite direction as shown by the arrow b.
  • a third axial projection 2a is provided so as to receive an axially urging force as applied to the projection 2a. By application of this axially urging force, the related peripheral projection 2b will be flexed axially as in the case of the similar peripheral projection 2b.
  • the two axial projections 2a and 2a are arranged diametrally opposite with each other.
  • a similar mutual relationship will be observed from FIG. 3 between the two peripheral projections 2b and 2b.
  • a conventional escape wheel 19, shown only schematically, is made integral with the fourth gear 8, in a known manner.
  • an electronically operated prime mover which may be a step motor, a drive balance wheel or the like which is electronically driven through a battery-charged electronic oscillator circuit and a mechanical vibrator, preferably of the quartz type, to the escape wheel 19, thence to fourth gear 8 for performing a unitary rotation therewith.
  • Motion is further transmitted from fourth gear 8 through second third gear 6, second seconds-hand pinion 5, clutch spring 2, arbor 1, first second-hands pinion 4, first third gear 12 and third pinion 13 to second gear 14, thence to a minute hand 24 and hour hand 25.
  • Numeral 130 represents a cup-shaped member' I which is loosely mounted on seconds-hand arbor 101, a
  • first seconds-hand pinion 4 By further manipulation of the manipulating member, so as to intentionally shift further rightwards in FIG. 1 until it engages with the control or locking earn 3 for locking the arbor l in position.
  • first seconds-hand pinion 4 With the locked condition of arbor l, first seconds-hand pinion 4, first third gear 12, third pinion 13, second gear 14 and the related gear train part are also locked simultaneously, thus the mutual and positional relationship among seconds hand, minute hand and hour hand being fixed in a position way.
  • second seconds-hand pinion being made integral with the upper part of said clutch member 130.
  • a resilient ring member 131 which is made of rubber, soft plastics or similar resilient material, is fixedly mounted within the interior of said clutch member 130.
  • the clutch member cooperates with clutch spring 102, so as to constitute jointly a clutch unit.
  • Numeral 119 is a seat member adapted for bringing the clutch spring into its disengaged position, when operated.
  • the pressure spring 109 is a member similar to that shown at 9 in the first embodiment and serves for prevention of occasional fluctuation of position of the seconds-hand pinion 105 during the regular timekeeping operation of the timepiece movement and during a seconds-hand locking operation.
  • a time-setting mechanism for an electronic timepiece comprising in combination:
  • a rotatable seconds-hand arbor carrying a seconds hand; a first seconds-hand pinion element fixedly mounted on said arbor; a third gear disposed in gear meshing with said first pinion element and with a second gear;
  • a clutch unit adapted for connecting said second pinion element into a unitary combination with said arbor
  • a locking cam fixedly mounted on said arbor and adapted to lock the arbor when subjected to a locking pressure.
  • a time-setting mechanism for an electronic timepiece using an electronically driven prime mover comprising: a gear train including a seconds-hand arbor and a seconds-hand pinion mounted thereon, an associated gear for transmitting motion from said prime mover to said arbor, said mechanism being characterized in that said seconds-hand pinion is divided into two elements (4; 5) (104; 105), the first element (4) (104) being fixedly mounted on said arbor (1; 101), while the second element (5) (105) is loosely mounted on said arbor, said associated gear (13) (1 13) being disposed in meshing with said first pinion element and a second gear, said second pinion element being adapted for receiving motion from said associated gear, and both said pinion elements being engageable with each other through a clutch unit which is operable from outside.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Operated Clutches (AREA)
  • Electromechanical Clocks (AREA)
US00237680A 1971-03-27 1972-03-24 Time-setting device for electric timepiece Expired - Lifetime US3731481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971021819U JPS5318762Y2 (enrdf_load_stackoverflow) 1971-03-27 1971-03-27

Publications (1)

Publication Number Publication Date
US3731481A true US3731481A (en) 1973-05-08

Family

ID=12065652

Family Applications (1)

Application Number Title Priority Date Filing Date
US00237680A Expired - Lifetime US3731481A (en) 1971-03-27 1972-03-24 Time-setting device for electric timepiece

Country Status (4)

Country Link
US (1) US3731481A (enrdf_load_stackoverflow)
JP (1) JPS5318762Y2 (enrdf_load_stackoverflow)
DE (1) DE2215660A1 (enrdf_load_stackoverflow)
GB (1) GB1340311A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813873A (en) * 1972-03-21 1974-06-04 Seiko Instr & Electronics Switching device for electronic watch
US4400091A (en) * 1980-02-05 1983-08-23 Seiko Koki Kabushiki Kaisha Second stop device of clock
US4932011A (en) * 1989-11-06 1990-06-05 Timex Corporation Three hand movement for a timepiece with improved timesetting gear train
EP4575662A1 (fr) * 2023-12-22 2025-06-25 Montres Breguet S.A. Système à friction pour mouvement d'horlogerie

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5337866Y2 (enrdf_load_stackoverflow) * 1974-12-30 1978-09-13
JPS6039829Y2 (ja) * 1975-12-27 1985-11-29 セイコーエプソン株式会社 電池時計
JPS5267578U (enrdf_load_stackoverflow) * 1976-10-07 1977-05-19
JPS5760969Y2 (enrdf_load_stackoverflow) * 1979-01-10 1982-12-25
JPS592797U (ja) * 1982-06-26 1984-01-09 株式会社豊田自動織機製作所 フオ−クリフトのクランプ装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982495A (en) * 1932-03-05 1934-11-27 Chicago Flexible Shaft Co Clock and interval timer
US2594106A (en) * 1945-09-29 1952-04-22 Weber Max Clock setting mechanism
US2607188A (en) * 1947-06-27 1952-08-19 Bourquin Edgar Front setting means for clocks
US3233400A (en) * 1963-10-21 1966-02-08 Arthur W Haydon Resettable clock or the like
US3443375A (en) * 1967-08-11 1969-05-13 Gen Time Corp Friction mechanism for clock
US3548587A (en) * 1969-01-13 1970-12-22 Gen Time Corp Friction construction for plastic clock movement
US3587224A (en) * 1967-03-22 1971-06-28 Wolfgang Ganter Timepiece having a setting device arranged coaxially with the hands arbors
US3653201A (en) * 1970-04-06 1972-04-04 Seiko Instr & Electronics Self-winding chronograph

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4516457Y1 (enrdf_load_stackoverflow) * 1966-04-28 1970-07-08

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1982495A (en) * 1932-03-05 1934-11-27 Chicago Flexible Shaft Co Clock and interval timer
US2594106A (en) * 1945-09-29 1952-04-22 Weber Max Clock setting mechanism
US2607188A (en) * 1947-06-27 1952-08-19 Bourquin Edgar Front setting means for clocks
US3233400A (en) * 1963-10-21 1966-02-08 Arthur W Haydon Resettable clock or the like
US3587224A (en) * 1967-03-22 1971-06-28 Wolfgang Ganter Timepiece having a setting device arranged coaxially with the hands arbors
US3443375A (en) * 1967-08-11 1969-05-13 Gen Time Corp Friction mechanism for clock
US3548587A (en) * 1969-01-13 1970-12-22 Gen Time Corp Friction construction for plastic clock movement
US3653201A (en) * 1970-04-06 1972-04-04 Seiko Instr & Electronics Self-winding chronograph

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813873A (en) * 1972-03-21 1974-06-04 Seiko Instr & Electronics Switching device for electronic watch
US4400091A (en) * 1980-02-05 1983-08-23 Seiko Koki Kabushiki Kaisha Second stop device of clock
US4932011A (en) * 1989-11-06 1990-06-05 Timex Corporation Three hand movement for a timepiece with improved timesetting gear train
EP4575662A1 (fr) * 2023-12-22 2025-06-25 Montres Breguet S.A. Système à friction pour mouvement d'horlogerie

Also Published As

Publication number Publication date
GB1340311A (en) 1973-12-12
JPS5318762Y2 (enrdf_load_stackoverflow) 1978-05-19
DE2215660A1 (de) 1972-10-12
JPS4717678U (enrdf_load_stackoverflow) 1972-10-30

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