US3589123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal device for electric alarm clocks
Assignee: MESSERS Gebr JUNGHANS GmbH
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Filing: 1968-08-15
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Granted: 1971-06-29
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Expires: 1988-08-15
Abstract
Abstract An electric clock having an electromagnetically operated movement regulator produces pulses therefrom to actuate a signal device such as a bell or buzzer continuously without loading of the clock regulator device. Thus electric pulses are provided at a specified time by the clockwork to excite an amplifier which after a predetermined time charges a condenser enough to maintain an amplifier in continuous excitation to operate the bell until a hand operated switch interrupts the circuit.
Inventors
- 👤 Hans Flaig
- 👤 Friedrich Assmus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:50
CPC Classifications
G; G04; G04C; G04C21/00; G04C21/16; G04C21/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A signal device for electric alarm clocks, particularly battery operated, comprising in combination an electric amplifier which produces a signal device driving pulse, a timepieceoperated switch for initiating the signal, a signal device operated by said amplifier, a source of signal pulses for controlling the signal device coupled to said amplifier, and a time-delay circuit coupled in said amplifier to maintain a constant driving voltage on the input to said amplifier after a predetermined period of excitation by said signal pulses.
Claim 2
Dependent Claim
81 words
A signal device for electric alarm clocks, particularly battery operated, comprising in combination an electric amplifier which produces a signal device driving pulse, a timepieceoperated switch for initiating the signal, a signal device operated by said amplifier, a source of signal pulses for controlling the signal device coupled to said amplifier, and a time-delay circuit coupled in said amplifier to maintain a constant driving voltage on the input to said amplifier after a predetermined period of excitation by said signal pulses.
Claim 3
Dependent Claim
28 words
A signal device as defined in claim 1, wherein the signal pulse source comprises an electric alarm clock havinG a self-controlled electric driving regulator producing said signal pulses.
Claim 4
Dependent Claim
56 words
A signal device as defined in claim 1 wherein the time-delay circuit and said amplifier comprises a two-transistor amplifier circuit, with an output circuit from one transistor including a condenser connected to the input circuit of the other transistor and the output circuit of said other transistor connected to the input circuit of said one transistor.
Claim 5
Dependent Claim
17 words
A signal device according to claim 3, wherein the condenser has a resistor connected in parallel therewith.
Claim 6
Dependent Claim
23 words
A signal device according to claim 3, wherein the condenser is coupled to the output circuit of said one transistor by a diode.
Claim 7
Dependent Claim
20 words
A signal device according to claim 1 having a hand-operated switch connected to interrupt the operation of said signal device.
Claim 8
Dependent Claim
21 words
A signal device according to claim 1 having a hand-operated switch connected to short circuit the input circuit of said amplifier.
References Cited (Backward Citations)
US3341841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |