CH632385GA3 - - Google Patents

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Publication number
CH632385GA3
CH632385GA3 CH987179A CH987179A CH632385GA3 CH 632385G A3 CH632385G A3 CH 632385GA3 CH 987179 A CH987179 A CH 987179A CH 987179 A CH987179 A CH 987179A CH 632385G A3 CH632385G A3 CH 632385GA3
Authority
CH
Switzerland
Prior art keywords
glass
coil
hand
band
frequency
Prior art date
Application number
CH987179A
Other languages
French (fr)
Other versions
CH632385B (en
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
Publication of CH632385B publication Critical patent/CH632385B/en
Application filed filed Critical
Priority to CH987179A priority Critical patent/CH632385B/en
Priority to EP80200980A priority patent/EP0028429A1/en
Priority to JP15295480A priority patent/JPS5674682A/en
Publication of CH632385GA3 publication Critical patent/CH632385GA3/fr

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/02—Constructional details

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

The electro-acoustic transducer comprises a sound-emitter element which consists of the glass (2) and of its support ring (17). The latter is an elastic membrane of annular form connected by adhesive bonding or welding, on the one hand to the periphery of the glass and on the other hand to the edge of the opening of the middle part-bezel (1). The joining element (16) is a rod fixed to the rear of the glass perpendicular to the latter. It carries the armature (27) located opposite the excitation electromagnet (21, 24, 26). The coil (26) is fed with current pulses from a battery housed in the movement (5). The frequency of the pulses sent to the coil (26) will be within a specific band, the actual frequency of the sound generator being located outside this band. <IMAGE>
CH987179A 1979-11-02 1979-11-02 WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE. CH632385B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH987179A CH632385B (en) 1979-11-02 1979-11-02 WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE.
EP80200980A EP0028429A1 (en) 1979-11-02 1980-10-16 Watch with an electro-acoustic warning device
JP15295480A JPS5674682A (en) 1979-11-02 1980-10-30 Clock having electronic alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH987179A CH632385B (en) 1979-11-02 1979-11-02 WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE.

Publications (2)

Publication Number Publication Date
CH632385B CH632385B (en)
CH632385GA3 true CH632385GA3 (en) 1982-10-15

Family

ID=4356575

Family Applications (1)

Application Number Title Priority Date Filing Date
CH987179A CH632385B (en) 1979-11-02 1979-11-02 WATCH WITH ELECTRO-ACOUSTIC WARNING DEVICE.

Country Status (3)

Country Link
EP (1) EP0028429A1 (en)
JP (1) JPS5674682A (en)
CH (1) CH632385B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4107862A1 (en) * 1991-03-12 1992-09-17 Int Watch Co Iwc CLOCK
EP2328044A1 (en) * 2009-11-25 2011-06-01 Rolex Sa Watch case
JP5570584B2 (en) * 2009-03-19 2014-08-13 ロレックス・ソシエテ・アノニム Watch side
EP3644132B1 (en) 2018-10-26 2022-06-08 Blancpain SA Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane
CN117280285A (en) 2021-05-04 2023-12-22 Eta瑞士钟表制造股份有限公司 Devices for maintaining or limiting clearances in watch parts

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1517125A (en) * 1967-02-16 1968-03-15 Advanced training in wristwatches
JPS5431709B2 (en) * 1972-02-19 1979-10-09
DE2334236C2 (en) * 1973-07-05 1975-07-10 Timex Corp., Waterbury, Conn. (V.St.A.) Acoustic signal transmitter for clocks, in particular wristwatches
CH626497B (en) * 1977-11-07 Ebauches Sa WATCH EQUIPPED WITH A RESONATOR SHAPED BY ITS ICE SUBJECT TO THE ACTION OF A TRANSDUCER.

Also Published As

Publication number Publication date
CH632385B (en)
JPS5674682A (en) 1981-06-20
EP0028429A1 (en) 1981-05-13

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Legal Events

Date Code Title Description
PL Patent ceased