US3875738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Watch with built-in audio alarm device
Assignee: Citizen Watch Co Ltd
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Filing: 1974-03-01
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Granted: 1975-04-08
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Expires: 1994-03-01
Abstract
Abstract This invention relates to an alarm watch adapted for delivery of voice frequency alarm signal by the use of a built-in miniaturized audio machine, preferably a cartridge endless tape type magnetic tape recorder. The watch is fitted with a built-in speaker, working magnet and moving coil which are shaped into respective cylindrical forms thereby providing a large idle space within the watch case for receiving the watch movement or the audio machine.
Inventors
- 👤 Shingo Ichikawa
- 👤 Humio Takeuchi
- 👤 Hideyuki Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:48
CPC Classifications
G; G04; G04G; G04G13/00; G04G13/02; G04G13/028; G04G13/021
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
An alarm watch comprising a watch case, a watch movement contained therein, speaker means built into said watch case, alarm setting means operatively connected to and driven by said watch movement, audio means mounted in said case and operatively connected with said alarm setting means, current source means, said speaker means being electrically connected with said audio means and said current source means and comprising a vibratory membrane, supported by said watch case, a cylindrical permanent magnet having a ring pole mounted on said watch case and a cylindrical movable coil secured to said membrane for vibratory movement relative to said magnet, said cylindrical magnet and ring pole defining a central cylindrical space in which said watch movement is located, said alarm setting means being adapted to initiate operation of said audio means by operation of said watch movement whereby audio signals from said audio means are applied to said movable coil of said speaker means for vibrating said membrane to generate an audio output therefrom.
Claim 2
Dependent Claim
166 words
An alarm watch comprising a watch case, a watch movement contained therein, speaker means built into said watch case, alarm setting means operatively connected to and driven by said watch movement, audio means mounted in said case and operatively connected with said alarm setting means, current source means, said speaker means being electrically connected with said audio means and said current source means and comprising a vibratory membrane, supported by said watch case, a cylindrical permanent magnet having a ring pole mounted on said watch case and a cylindrical movable coil secured to said membrane for vibratory movement relative to said magnet, said cylindrical magnet and ring pole defining a central cylindrical space in which said watch movement is located, said alarm setting means being adapted to initiate operation of said audio means by operation of said watch movement whereby audio signals from said audio means are applied to said movable coil of said speaker means for vibrating said membrane to generate an audio output therefrom.
Claim 3
Dependent Claim
17 words
An alarm watch as set forth in claim 1 wherein said membrane is made of transparent material.
Claim 4
Dependent Claim
37 words
An alarm watch as set forth in claim 1 wherein said ring pole is integral with and concentrically spaced from said cylindrical magnet to define a cylindrically shaped magnetic gap in which said movable coil is positioned.
Claim 5
Dependent Claim
27 words
An alarm watch as set forth in claim 1 wherein a magnetic circuit is formed which includes said permanent magnet and the material of said watch case.
Claim 6
Dependent Claim
25 words
An alarm watch as set forth in claim 1 wherein said audio means is comprised of a miniaturized endless tape cartridge type magnetic tape recorder.
Claim 7
Dependent Claim
21 words
An alarm watch as set forth in claim 1 wherein said audio means is comprised of a miniaturized radio receiving set.
Claim 8
Dependent Claim
30 words
An alarm watch as set forth in claim 1 wherein said alarm setting means include cam operated switch means for operating said audio means for a predetermined period of time.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |