GB771823A - Improvements in or relating to timepiece mechanisms - Google Patents

Improvements in or relating to timepiece mechanisms

Info

Publication number
GB771823A
GB771823A GB30399/55A GB3039955A GB771823A GB 771823 A GB771823 A GB 771823A GB 30399/55 A GB30399/55 A GB 30399/55A GB 3039955 A GB3039955 A GB 3039955A GB 771823 A GB771823 A GB 771823A
Authority
GB
United Kingdom
Prior art keywords
balance
detector
radio
impulsed
detectors
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
GB30399/55A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB771823A publication Critical patent/GB771823A/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
    • G04C3/04—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
    • G04C3/065—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 gear-train by means of static switches, e.g. transistor circuits

Abstract

771,823. Reciprocating electric motors. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct. 24, 1955 [Oct. 27, 1954], No. 30399/55. Class 35. [Also in Groups XVIII and XL (b)] In an electric timepiece the maintaining circuit for the oscillating control member, e.g. the balance 1, Fig. 1, includes a quantity of radioactive material 4 and a detector 5 which is sensitive to radio-active radiation. As the balance swings in the direction of the arrow the detector 5, e.g. a photo-transistor is activated and the capacitor 8 discharges through the magnet coil 6 which attracts the armature 7 and impulses the balance. The value of the capacitor 8 and the resistor 10 are adjusted so that no appreciable impulse is given to the balance as it swings in the return direction. If desired the maintaining circuit may include a switch, e.g. a flip-flop which passes only one in two control signals to the magnet coil so that the balance is impulsed in one direction only. An apertured screen may be provided to obstruct the radio-active radiation until the balance is in the correct position. The detector may be on the balance and the quantity of radio-active material may be housed in a lead protective envelope. In another embodiment, Fig. 2, the balance is impulsed in both directions of movement, two detectors 5<SP>1</SP>, 5<SP>11</SP> being provided. The balance and its support and the detector or detectors may form an interchangeable unit.
GB30399/55A 1954-10-27 1955-10-24 Improvements in or relating to timepiece mechanisms Expired GB771823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL771823X 1954-10-27

Publications (1)

Publication Number Publication Date
GB771823A true GB771823A (en) 1957-04-03

Family

ID=19829879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30399/55A Expired GB771823A (en) 1954-10-27 1955-10-24 Improvements in or relating to timepiece mechanisms

Country Status (1)

Country Link
GB (1) GB771823A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211706B (en) * 1962-08-09 1966-03-03 Max Planck Gesellschaft Electric pulse generator
US3370414A (en) * 1965-06-22 1968-02-27 Benrus Watch Company Inc Electronic timepiece
GB2121953A (en) * 1982-06-10 1984-01-04 Itt Ind Ltd Improvements in transducers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211706B (en) * 1962-08-09 1966-03-03 Max Planck Gesellschaft Electric pulse generator
US3370414A (en) * 1965-06-22 1968-02-27 Benrus Watch Company Inc Electronic timepiece
GB2121953A (en) * 1982-06-10 1984-01-04 Itt Ind Ltd Improvements in transducers

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