US3922672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audible alarm device
Assignee: Duracell Inc USA
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Filing: 1974-03-04
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Granted: 1975-11-25
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Expires: 1994-03-04
Abstract
Abstract A piezoelectric transducer is utilized in conjunction with a tone generator, a pulsator means, and a transient protection means to produce an audible alarm in response to various input electrical signals.
Inventors
- 👤 Thomas W Birt
- 👤 Louis P Sweany
- 👤 James D Pirtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:36
CPC Classifications
G; G08; G08B; G08B19/00; B; B60; B60Q; B60Q5/00; G08B3/00; G08B3/10; Y; Y10; Y10S; Y10S331/00; Y10S331/03
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
240 words
An audible alarm system comprising in combination. a. an input-output terminal means for providing electrical terminations for attaching electrical circuits; b. a transient protection circuit for protecting said audible alarm system against voltage transients and having an input side connected to said input-output terminal means, and an output side; c. a tone generator circuit for producing an audible tone and having an input side and an output side including a piezoelectric transducer connected to said input-output terminal means; and d. a pulsator circuit for producing pulsations in said audible tone comprising: 1. a first NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, and a second input connected to one side of a first resistance means; 2. a second NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, a second input connected to an output of said first NAND gate section and to a first side of a second resistance means, and an output of said second NAND gate section connected to said input side of said tone generator circuit and to a first side of a capacitance means; and 3. a second side of said first resistance means connected to a second side of said second resistance means and to a second side of said capacitance means
Claim 2
Dependent Claim
240 words
An audible alarm system comprising in combination. a. an input-output terminal means for providing electrical terminations for attaching electrical circuits; b. a transient protection circuit for protecting said audible alarm system against voltage transients and having an input side connected to said input-output terminal means, and an output side; c. a tone generator circuit for producing an audible tone and having an input side and an output side including a piezoelectric transducer connected to said input-output terminal means; and d. a pulsator circuit for producing pulsations in said audible tone comprising: 1. a first NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, and a second input connected to one side of a first resistance means; 2. a second NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, a second input connected to an output of said first NAND gate section and to a first side of a second resistance means, and an output of said second NAND gate section connected to said input side of said tone generator circuit and to a first side of a capacitance means; and 3. a second side of said first resistance means connected to a second side of said second resistance means and to a second side of said capacitance means
Claim 3
Dependent Claim
79 words
a second NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, a second input connected to an output of said first NAND gate section and to a first side of a second resistance means, and an output of said second NAND gate section connected to said input side of said tone generator circuit and to a first side of a capacitance means; and
Claim 4
Dependent Claim
79 words
a second NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, a second input connected to an output of said first NAND gate section and to a first side of a second resistance means, and an output of said second NAND gate section connected to said input side of said tone generator circuit and to a first side of a capacitance means; and
Claim 5
Dependent Claim
185 words
A multiple audible alarm system comprising in combination. a. an input-output terminal means for providing electrical termination for attaching electrical circuits; b. a transient protection circuit for protecting said audible alarm system against voltage transients and having an input side connected to said input-output terminal means, and an output side; c. a tone generator circuit for producing an audible tone and having an input side and an output side including a piezoelectric transducer connected to said input-output terminal means; and d. a ground isolation circuit providing more than one ground path to said multiple audible alarm system, a first side connected directly to said input-output terminal means, a second side connected directly to said input side of said transient protection circuit and to said input-output terminal means, and also to said input side of said transient protection circuit and to said input output terminal means through a first resistance means, and a third side connected to said input side of said tone generator circuit; whereby said piezoelectric transducer provides pulsating sounds or continuous sounds in response to a precondition of said multiple function alarm system.
Claim 6
Dependent Claim
185 words
A multiple audible alarm system comprising in combination. a. an input-output terminal means for providing electrical termination for attaching electrical circuits; b. a transient protection circuit for protecting said audible alarm system against voltage transients and having an input side connected to said input-output terminal means, and an output side; c. a tone generator circuit for producing an audible tone and having an input side and an output side including a piezoelectric transducer connected to said input-output terminal means; and d. a ground isolation circuit providing more than one ground path to said multiple audible alarm system, a first side connected directly to said input-output terminal means, a second side connected directly to said input side of said transient protection circuit and to said input-output terminal means, and also to said input side of said transient protection circuit and to said input output terminal means through a first resistance means, and a third side connected to said input side of said tone generator circuit; whereby said piezoelectric transducer provides pulsating sounds or continuous sounds in response to a precondition of said multiple function alarm system.
Claim 7
Dependent Claim
27 words
a second side of said first resistance means connected to a second side of said second resistance means and to a second side of said capacitance means
Claim 8
Dependent Claim
27 words
a second side of said first resistance means connected to a second side of said second resistance means and to a second side of said capacitance means
Claim 9
Dependent Claim
60 words
A multiple function alarm system according to claim 2 wherein said tone generator circuit further includes at least one NAND gate, said NAND gate and said pulsator circuit included as an integrated circuit package and wherein said third side of said ground isolation circuit is connected a minus voltage terminal of said integrated circuit package and to said piezoelectric transducer.
Claim 10
Dependent Claim
17 words
A multiple function alarm system acCording to claim 3 wherein said pulsator circuit includes two NAND gates.
Claim 11
Dependent Claim
100 words
A multiple audible alarm system according to claim 2 wherein said input-output terminal means includes: a. a second termination connected to said third side of said ground isolation circuit; b. a second termination connected to said input side of said transient protection circuit and also through said first resistance means to said first termination; c. a third termination connected to said input side of said transient protection circuit; and d. a fourth termination connected to said of said transient protection circuit, said second side of said ground isolation circuit, and also through a second resistance means to said third termination.
Claim 12
Dependent Claim
164 words
A multiple audible alarm system according to claim 2 wherein said pulsator circuit comprises: a. a first NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection circuit, and a second input to one side of a third resistance means; b. a second NAND gate section of a Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said transient protection means, a second input connected to an output of said first NAND gate section and to a first side of a fourth resistance means, and an output of said second NAND gate section connected to said input side of said tone generator circuit and to a first side of a first capacitance means; and c. a second side of said third resistance means connected to a second side of said fourth resistance means and to a second side of said first capacitance means.
Claim 13
Dependent Claim
200 words
A multiple audible alarm system according to claim 2 wherein: said piezoelectric transducer has three electrodes, a first electrode of which is connected to said third side of said ground isolation circuit and said minus voltage terminal of a Quad two-input NAND gate integrated circuit package; and wherein said tone generator circuit further includes: a. a third NAND gate section of said Quad two-input NAND gate integrated circuit package, a first input connected to said output side of said pulsator circuit, a second input connected to a first side of a fifth resistance means and to a second electrode of said piezoelectric transducer, an output connected to a second side of said fifth resistance means and to a first side of a sixth resistance means; b. a fourth NAND gate section of said Quad two-input NAND gate integrated circuit package, a first input connected to said first input of said third NAND gate section, a second input connected to said second input of said third NAND gate section, and an output connected to said output of said third NAND gate section; and c. a second side of said sixth resistance means connected to a third electrode of said piezoelectric transducer.
Claim 14
Dependent Claim
126 words
A multiple alarm system according to claim 2 wherein said ground isolation circuit includes first and second diodes, the anodes of which are connected together and to said output side of said tone generator circuit and said minus voltage terminal, the same being a terminal of a Quad two-input NAND gate integrated circuit package, a cathode of said first diode connected to a first termination of said input-output terminal means and through a first resistance means to a second termination of said input-output terminal means, and a cathode of said second diode connected to said fourth termination of said input-output terminal means, through a second resistance means to a third termination of said input-output terminal means, and to said input side of said transient protection circuit.
Claim 15
Dependent Claim
79 words
A multiple audible alarm system according to claim 2 wherein said transient protection circuit comprises seventh, eighth and ninth resistance means, said seventh resistance means connected between said fourth termination and said input side of said pulsator circuit, said eighTh resistance means connected between said third termination and a positive voltage terminal of a Quad two-input NAND gate integrated circuit package, and said ninth resistance means connected between said second termination and said input side of said pulsator circuit.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |