US3879726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audible alarm unit
Assignee: Duracell Inc USA
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Filing: 1973-10-09
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Granted: 1975-04-22
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Expires: 1993-10-09
Abstract
Abstract A piezoelectric transducer is carried in one of two compartments of a cup-shaped housing member with a printed circuit board assembly having an electrical circuit to energize the piezoelectric transducer carried in the other compartment.
Inventors
- 👤 Louis P Sweany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:51
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12; G10K9/122; G08; G08B; G08B3/00; G08B3/10; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
An audible alarm unit comprising: a. a housing including a cup-shaped member having open and closed ends, first and second storage compartments, and a cover closing said open end, b. shelf means providing a means separating said compartments, c. an aperture in said closed end providing an opening to one of said compartments, and a rib surrounding said aperture, d. a piezoelectric transducer bonded to said rib and having a vibrating surface exposed to said aperture, e. a printed circuit board assembly carried by said shelf in the other of said compartments including an electrical circuit for energizing said piezoelectric transducer, f. electrical terminals extending from said printed circuit board assembly out through said cover, g. alarm unit mounting means comprising a ring carried by said cover and a plurality of ears extending from said ring, and h. spacer means carried by and disposed between said printed circuit board and said cover to maintain said printed circuit board and cover in spaced relation.
Claim 2
Dependent Claim
163 words
An audible alarm unit comprising: a. a housing including a cup-shaped member having open and closed ends, first and second storage compartments, and a cover closing said open end, b. shelf means providing a means separating said compartments, c. an aperture in said closed end providing an opening to one of said compartments, and a rib surrounding said aperture, d. a piezoelectric transducer bonded to said rib and having a vibrating surface exposed to said aperture, e. a printed circuit board assembly carried by said shelf in the other of said compartments including an electrical circuit for energizing said piezoelectric transducer, f. electrical terminals extending from said printed circuit board assembly out through said cover, g. alarm unit mounting means comprising a ring carried by said cover and a plurality of ears extending from said ring, and h. spacer means carried by and disposed between said printed circuit board and said cover to maintain said printed circuit board and cover in spaced relation.
Claim 3
Dependent Claim
163 words
An audible alarm unit comprising: a. a housing including a cup-shaped member having open and closed ends, first and second storage compartments, and a cover closing said open end, b. shelf means providing a means separating said compartments, c. an aperture in said closed end providing an opening to one of said compartments, and a rib surrounding said aperture, d. a piezoelectric transducer bonded to said rib and having a vibrating surface exposed to said aperture, e. a printed circuit board assembly carried by said shelf in the other of said compartments including an electrical circuit for energizing said piezoelectric transducer, f. electrical terminals extending from said printed circuit board assembly out through said cover, g. alarm unit mounting means comprising a ring carried by said cover and a plurality of ears extending from said ring, and h. spacer means carried by and disposed between said printed circuit board and said cover to maintain said printed circuit board and cover in spaced relation.
Claim 4
Dependent Claim
163 words
An audible alarm unit comprising: a. a housing including a cup-shaped member having open and closed ends, first and second storage compartments, and a cover closing said open end, b. shelf means providing a means separating said compartments, c. an aperture in said closed end providing an opening to one of said compartments, and a rib surrounding said aperture, d. a piezoelectric transducer bonded to said rib and having a vibrating surface exposed to said aperture, e. a printed circuit board assembly carried by said shelf in the other of said compartments including an electrical circuit for energizing said piezoelectric transducer, f. electrical terminals extending from said printed circuit board assembly out through said cover, g. alarm unit mounting means comprising a ring carried by said cover and a plurality of ears extending from said ring, and h. spacer means carried by and disposed between said printed circuit board and said cover to maintain said printed circuit board and cover in spaced relation.
Claim 5
Dependent Claim
24 words
An audible alarm unit according to claim 1 wherein said shelf means includes a rib extending around the inner periphery of said cup-shaped member.
Claim 6
Dependent Claim
29 words
An audible alarm unit according to claim 2 wherein said first and second compartments are of different diameters and said rib is provided by a taper between said compartments.
Claim 7
Dependent Claim
22 words
An audible alarm unit according to claim 1 further comprising a protective grill extending across said aperture to protect said vibrating surface.
Claim 8
Dependent Claim
34 words
An audible alarm unit according to claim 1 wherein said spacer means comprises a ring disposed about an inner periphery of said cup-shaped member and disposed between said cover and said printed circuit board.
Claim 9
Dependent Claim
15 words
An audible alarm unit according to claim 1 wherein said cup-shaped member is soft steel.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |