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CH617818B - WATCH, EQUIPPED WITH AN ALARM SIGNAL GENERATING DEVICE, THE ACOUSTIC INTENSITY OF WHICH VARIES GRADUALLY. - Google Patents

WATCH, EQUIPPED WITH AN ALARM SIGNAL GENERATING DEVICE, THE ACOUSTIC INTENSITY OF WHICH VARIES GRADUALLY.

Info

Publication number
CH617818B
CH617818B CH1201076A CH1201076A CH617818B CH 617818 B CH617818 B CH 617818B CH 1201076 A CH1201076 A CH 1201076A CH 1201076 A CH1201076 A CH 1201076A CH 617818 B CH617818 B CH 617818B
Authority
CH
Switzerland
Prior art keywords
transducer
watch
frequency
time
generating device
Prior art date
Application number
CH1201076A
Other languages
French (fr)
Other versions
CH617818GA3 (en
Inventor
Fumikazu Murakami
Original Assignee
Seiko Instr & Electronics
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 of CH617818B publication Critical patent/CH617818B/en
Application filed by Seiko Instr & Electronics filed Critical Seiko Instr & Electronics
Publication of CH617818GA3 publication Critical patent/CH617818GA3/en

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/02—Constructional details
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)

Abstract

1525818 Alarm generating apparatus DAINI SEIKOSHA KK 20 Sept 1976 [22 Sept 1975] 38891/76 Heading G5J Alarm generating apparatus comprises an electro-acoustic transducer having a resonant frequency in the audible range, and driving circuitry, including time-setting means, producing a driving signal for the transducer during a predetermined time-period whose frequency varies unidirectionally within a range including the resonant frequency so that, in operation, the frequency and the volume of the audible sound produced by the transducer change with time. The frequency of the driving signal may vary continuously and linearly or stepwise. The apparatus may be incorporated into a watch or a selective calling system. The time-setting means may be a one-shot multivibrator, and reset means may be provided for terminating the audible sound produced by the transducer.
CH1201076A 1975-09-22 1976-09-22 Watch, provided with a device generating an alarm signal whose acoustic intensity varies gradually CH617818GA3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50114543A JPS5238259A (en) 1975-09-22 1975-09-22 Alarm sound producing device

Publications (2)

Publication Number Publication Date
CH617818B true CH617818B (en)
CH617818GA3 CH617818GA3 (en) 1980-06-30

Family

ID=14640393

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1201076A CH617818GA3 (en) 1975-09-22 1976-09-22 Watch, provided with a device generating an alarm signal whose acoustic intensity varies gradually

Country Status (4)

Country Link
JP (1) JPS5238259A (en)
CH (1) CH617818GA3 (en)
DE (1) DE2641149A1 (en)
GB (1) GB1525818A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54670A (en) * 1977-05-26 1979-01-06 Seiko Instr & Electronics Ltd Alarm wrista watch
JPH01148991A (en) * 1987-12-07 1989-06-12 Matsushita Electric Ind Co Ltd Alarm sound generator
JP6017499B2 (en) * 2014-06-26 2016-11-02 京セラドキュメントソリューションズ株式会社 Electronic device and notification sound output program
EP3591475B1 (en) * 2018-07-02 2021-02-24 The Swatch Group Research and Development Ltd Thermoelectric watch suitable for being tested in production or after-sales service

Also Published As

Publication number Publication date
CH617818GA3 (en) 1980-06-30
DE2641149A1 (en) 1977-03-31
GB1525818A (en) 1978-09-20
JPS5238259A (en) 1977-03-24

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Legal Events

Date Code Title Description
PL Patent ceased