GB1248179A - Tuning fork drive for clocks - Google Patents

Tuning fork drive for clocks

Info

Publication number
GB1248179A
GB1248179A GB04737/70A GB1473770A GB1248179A GB 1248179 A GB1248179 A GB 1248179A GB 04737/70 A GB04737/70 A GB 04737/70A GB 1473770 A GB1473770 A GB 1473770A GB 1248179 A GB1248179 A GB 1248179A
Authority
GB
United Kingdom
Prior art keywords
tuning fork
magnet
prong
coils
secured
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
Application number
GB04737/70A
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.)
SCHATZ SOEHNE JAHRESUHREN
Jahresuhren Fabrik GmbH
Original Assignee
SCHATZ SOEHNE JAHRESUHREN
Jahresuhren Fabrik 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 SCHATZ SOEHNE JAHRESUHREN, Jahresuhren Fabrik GmbH filed Critical SCHATZ SOEHNE JAHRESUHREN
Publication of GB1248179A publication Critical patent/GB1248179A/en
Expired legal-status Critical Current

Links

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
    • G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • G04C3/107—Controlling frequency or amplitude of the oscillating system
    • 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
    • G04C3/08—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/10—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
    • G04C3/101—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details
    • G04C3/104—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details of the pawl or the ratched-wheel
    • G04C3/105—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 mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means constructional details of the pawl or the ratched-wheel pawl and ratched-wheel being magnetically coupled

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Microwave Tubes (AREA)
  • Electromagnets (AREA)
  • Electromechanical Clocks (AREA)

Abstract

1,248,179. Blocks. JAHRESUHREN-FABRIK. G.m.b.H. AUG. SCHATZ & SOHNE. March 26, 1970 [April 29, 1969], No. 14737/70. Heading G3T. A drive unit for a clock comprises a tuning fork 11 driven by a coil 13 energized from an electronic amplifier, (not shown), responsive to the output of a feedback coil 14. An escapement 15 co-operates with a bar-shaped permanent magnet 17 secured in a slot in a non-magnetic body 18 secured to a prong 11 of the tuning fork. A similar magnet 20 is symmetrically arranged in a block 21 on the other prong 12 and co-operates with an adjustable slotted pole shoe 19 the air-space between magnet and shoe, being adjusted to compensate for isochronism. Permanent magnets having opposite polarity, are symmetrically mounted within the coils 13, 14 against a notch; the windings of the coils being self-supporting. The drive is stated to be of use for a frequency below 300Hz.
GB04737/70A 1969-04-29 1970-03-26 Tuning fork drive for clocks Expired GB1248179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691921795 DE1921795A1 (en) 1969-04-29 1969-04-29 Tuning fork drive for clocks

Publications (1)

Publication Number Publication Date
GB1248179A true GB1248179A (en) 1971-09-29

Family

ID=5732745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB04737/70A Expired GB1248179A (en) 1969-04-29 1970-03-26 Tuning fork drive for clocks

Country Status (5)

Country Link
US (1) US3638416A (en)
CH (2) CH412070A4 (en)
DE (1) DE1921795A1 (en)
FR (1) FR2040350B1 (en)
GB (1) GB1248179A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5538090B2 (en) * 2010-06-23 2014-07-02 株式会社ジャパンディスプレイ Glass cutter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA704477A (en) * 1965-02-23 Nomura Yasuo Tuning fork clock
US2743614A (en) * 1950-07-15 1956-05-01 Clifford Cecil Frank Mechanical oscillators
FR1044830A (en) * 1950-07-15 1953-11-20 Horstmann Magnetics Ltd Mechanical oscillator and magnetic escapement mechanism comprising this oscillator
CH405171A (en) * 1962-08-11 1965-09-15 Lavet Marius Jean Time apparatus and method of manufacturing this apparatus
FR1395583A (en) * 1963-10-17 1965-04-16 Improvements to small magnetoelectric devices regulated by combinations of vibrating organs
US3338047A (en) * 1965-10-18 1967-08-29 Gen Time Corp Frequency regulator for tuning fork drive system

Also Published As

Publication number Publication date
FR2040350A1 (en) 1971-01-22
FR2040350B1 (en) 1974-07-12
DE1921795A1 (en) 1970-12-03
CH513444A (en) 1971-03-31
CH412070A4 (en) 1971-03-31
US3638416A (en) 1972-02-01

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