US4602248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical atmospheric pressure alarm
Assignee: Individual
•
Filing: 1985-03-11
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Granted: 1986-07-22
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Expires: 2005-03-11
Abstract
Abstract The atmospheric pressure actuated alarm of the present invention comprises a pressure transducer which senses the atmospheric pressure and produces an electrical transducer signal in response thereto. A difference amplifier is connected to the pressure transducer for measuring the transducer signal and for producing an output signal whenever the transducer signal is of a magnitude outside a predetermined range. An operational amplifier is connected to the difference amplifier for amplifying the transducer signal. A latch is connected to the operational amplifier for receiving the amplified signal. A signal alarm and a power source are connected in series with the latch. The latch is changeable from an open condition to a closed condition in response to the amplified signal being greater than a predetermined magnitude. When the latch moves to the closed condition, it connects the power source to the alarm signal and causes actuation of the alarm signal.
Inventors
- 👤 Michael L. Foster
- 👤 Harold L. Foster
- 👤 Michael A. Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:05
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/182
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
An atmospheric pressure actuated alarm comprising: a pressure transducer adapted to sense changes in atmospheric pressure and to produce an electrical transducer signal in response thereto; a difference amplifier connected to said pressure transducer for measuring said transducer signal and being adapted to produce an output signal whenever said transducer signal is of a predetermined magnitude resulting from exposure of said transducer to the atmospheric pressure change caused by a tornado; an operational amplifier connected to said difference amplifier for producing an amplified signal corresponding to said output signal received from said difference amplifier; latch means connected to said operational amplifier for receiving said amplified signal; signal means connected to said latch means and being capable of actuation to cause a humanly perceptible warning signal; p1 a power source connected in series with said latch means and said signal means; said latch means being changeable from an open condition to a closed condition in response to said amplified signal being greater than a predetermined magnitude whereby said power source will be placed in electrical connection with said signal means to cause actuation of said signal means; said pressure transducer, said difference amplifier, said operational amplifier, and said latch means comprising solid state circuitry and being free from moving parts.
Claim 2
Dependent Claim
209 words
An atmospheric pressure actuated alarm comprising: a pressure transducer adapted to sense changes in atmospheric pressure and to produce an electrical transducer signal in response thereto; a difference amplifier connected to said pressure transducer for measuring said transducer signal and being adapted to produce an output signal whenever said transducer signal is of a predetermined magnitude resulting from exposure of said transducer to the atmospheric pressure change caused by a tornado; an operational amplifier connected to said difference amplifier for producing an amplified signal corresponding to said output signal received from said difference amplifier; latch means connected to said operational amplifier for receiving said amplified signal; signal means connected to said latch means and being capable of actuation to cause a humanly perceptible warning signal; p1 a power source connected in series with said latch means and said signal means; said latch means being changeable from an open condition to a closed condition in response to said amplified signal being greater than a predetermined magnitude whereby said power source will be placed in electrical connection with said signal means to cause actuation of said signal means; said pressure transducer, said difference amplifier, said operational amplifier, and said latch means comprising solid state circuitry and being free from moving parts.
Claim 3
Dependent Claim
30 words
An alarm according to claim 1 wherein a reset switch is connected between said power source and said signal means for permitting the selective manual deactuation of said signal means.
Claim 4
Dependent Claim
15 words
An alarm according to claim 2 wherein said signal means comprises a sound alarm means.
Claim 5
Dependent Claim
15 words
An alarm according to claim 2 wherein said signal means comprises a warning light means.
Claim 6
Dependent Claim
21 words
An alarm according to claim 2 wherein said signal means comprises both a warning light means and a sound alarm means.
References Cited (Backward Citations)
US86114A
Cited
US3029422A
Cited
US2976522A
Cited
US3266315A
Cited
US3315462A
Cited
US3336798A
Cited
US3631435A
Cited
US3646540A
Cited
US3623051A
Cited
US3748656A
Cited
US3810137A
Cited
US3914755A
Cited
US4279028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |