US3859784A - Electric watch with electrodynamic motor - Google Patents

Electric watch with electrodynamic motor Download PDF

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Publication number
US3859784A
US3859784A US423132A US42313273A US3859784A US 3859784 A US3859784 A US 3859784A US 423132 A US423132 A US 423132A US 42313273 A US42313273 A US 42313273A US 3859784 A US3859784 A US 3859784A
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US
United States
Prior art keywords
driving mechanism
balance
movable element
coil
electric watch
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
US423132A
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English (en)
Inventor
Ali Schneiter
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.)
Ebauches SA
Original Assignee
Ebauches SA
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 Ebauches SA filed Critical Ebauches SA
Application granted granted Critical
Publication of US3859784A publication Critical patent/US3859784A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/06—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance
    • G04C3/061—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using electromagnetic coupling between electric power source and balance the balance controlling contacts and mechanically driving the gear-train
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction

Definitions

  • An electric watch with an electrodynamic motor includes a stationary coil and moveable magnets.
  • the 58/28 ds f driving mechanism portion is situated at the same 58 i D level in the motor as the coil and is made of non- 1 0 3 magnetic and insulating material for preventing perturbations due to magnetic causes and to currents of [56] References Cited Fmcault' UNITED STAT PATENTS 3 Claims, 3 Drawing Figures 2,847,818 8/1958 Junghans et al. 58/28 D PATENIED JAN 1 4mm SHEET 2 BF 2
  • the present invention relates to an electric watch with electrodynamic motor comprising a transductor the coil of which is stationary and the magnet or magnets of which are carried by the movable element.
  • This watch is characterized by the fact that it comprises a driving mechanism by the intermediary of which the said movable element drives the elements indicating the time, this driving mechanism being situated at the level, measured in height, of the said coil and being made of non magnetic and insulating material at least in its portion swept by the field of the movable magnet, the whole in such a way that perturbations due to magnetic causes and to currents of Foucault be prevented.
  • the drawing shows, by way of example, one embodiment of the object of the invention.
  • FIG. 1 is a plan view, with a partial section according to the broken line 1-1 of FIG. 2, of a part of an electric watch.
  • FIG. 2 is a sectional view along line 11-11 of FIG. 1, and
  • FIG. 3 is a sectional view, similar to this one of FIG. 2, of a conventional construction, illustrating the drawbacks of such an arrangement with respect to the present construction.
  • the watch shown comprises a frame including a base plate 1 and a bridge 2 between, which is rotatably mounted the balance comprising a shaft 3 carrying two plates 4 on each of which are mounted two permanent magnets 5, connected to each other by an armature plate 6, and a counterweight 7.
  • a cake shaped coil 8 is partially engaged between the two plates 4 of the balance.
  • This coil comprises a first winding intended to produce, by induction, a signal at the passage of the magnets, during the oscillations of the balance, which signal is amplified by a not represented electronic circuit and sent into a second winding of the said coil which then applies to the said magnets a maintaining pulse.
  • the counting of the oscillations of the balance in view of the time display is effected by means of an oscillating lever 9, having two arms, rotatably mounted at 10 between the base plate 1 on the one hand and a bridge 11 of the frame of the movement on the other hand, and one of the arms of which is operated by a pin 12, parallel to the shaft of the balance, carried by a dsic 3a provided on this shaft.
  • a blade spring 13 acts on the lever 9 for maintaining it applied against the pin 12.
  • the second arm of the lever 9 carries, secured to three pins 14, a blade spring 15, acting as a pawl, cooperating with a ratchet counting wheel 16 driving the gearing of the movement the first element of which, i.e., the seconds element, designated by 17, has been only represented.
  • a retaining pawl constituted by an elastic blade 18 carried by an elastic arm 19 acts also on the counting wheel 16.
  • An excentric member 20 permits to ad- 5 just very precisely the position of the pawl 18.
  • this lever is realized in a non magnetic and insulating material, for instance in polyacetal plastic such as DELRIN (Registered Trademark).
  • the driving mechanism that is to say the lever 9 and the pin 12
  • the driving mechanism is situated at the level, measured in height, of the coil 8.
  • the said driving mechanism is situated below the lower plate of the balance.
  • a counting pallets 21, rotatably mounted at 22 is operated by a pin 23 carried by a plate 24 and operates itself, by means of its lifts 25, the counting wheel, designated by 26.
  • all this mechanism is situated below the lower plate 27 of the balance the shaft of which is designated by 28.
  • Electric watch with electrodynamic motor comprising a transductor which has a movable element and the coil of which is stationary and at least one magnet carried by the movable element, characterized by the fact that it comprises a driving mechanism by the intermediary of which the said movable element drives the elements indicating the time, this driving mechanism being situated at the level, measured in height, of the said coil and being made of non-magnetic and insulating material at least in its portion swept by the field of the movable magnet, for preventing perturbations due to magnetic causes and to currents of Foucault.
  • said movable element includes a double plate driving balance, characterized by the fact that the said driving mechanism is situated between the two plates.
  • Electric watch as claimed in claim 2 characterized by the fact that the said driving mechanism is constituted by a pin parallel to the axis of the balance, carried by a disc secured to the shaft of the balance, between the two plates of this latter, and by an oscillating two arms lever, one arm of which cooperates with the said pin, a resilient device for maintaining said one arm applied against said pin and the other arm of which carries a pawl operating a ratchet counting wheel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
US423132A 1972-12-28 1973-12-10 Electric watch with electrodynamic motor Expired - Lifetime US3859784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1898672A CH577211B5 (ja) 1972-12-28 1972-12-28

Publications (1)

Publication Number Publication Date
US3859784A true US3859784A (en) 1975-01-14

Family

ID=4436577

Family Applications (1)

Application Number Title Priority Date Filing Date
US423132A Expired - Lifetime US3859784A (en) 1972-12-28 1973-12-10 Electric watch with electrodynamic motor

Country Status (6)

Country Link
US (1) US3859784A (ja)
JP (1) JPS4998673A (ja)
CH (2) CH577211B5 (ja)
DE (1) DE2363946B2 (ja)
FR (1) FR2212578B1 (ja)
GB (1) GB1427048A (ja)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847818A (en) * 1952-02-20 1958-08-19 Junghans Helmut Electromagnetically operated clocks
US3002335A (en) * 1958-09-08 1961-10-03 Marvin I Glass Toy clock
US3059413A (en) * 1959-01-02 1962-10-23 Hamilton Watch Co Pallet fork contacting and indexing means for electric watch
US3708974A (en) * 1970-12-28 1973-01-09 Suwa Seikosha Kk Pallet attracting construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847818A (en) * 1952-02-20 1958-08-19 Junghans Helmut Electromagnetically operated clocks
US3002335A (en) * 1958-09-08 1961-10-03 Marvin I Glass Toy clock
US3059413A (en) * 1959-01-02 1962-10-23 Hamilton Watch Co Pallet fork contacting and indexing means for electric watch
US3708974A (en) * 1970-12-28 1973-01-09 Suwa Seikosha Kk Pallet attracting construction

Also Published As

Publication number Publication date
CH1898672A4 (ja) 1976-01-30
DE2363946A1 (de) 1974-07-18
FR2212578A1 (ja) 1974-07-26
JPS4998673A (ja) 1974-09-18
FR2212578B1 (ja) 1977-09-09
CH577211B5 (ja) 1976-06-30
GB1427048A (en) 1976-03-03
DE2363946B2 (de) 1975-08-21

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