Patent US3631271A successfully refreshed from Google Patents.
US3631271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burglar alarm switch
Assignee: DEIKO ELECTRONICS IND CO Ltd
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Filing: 1970-10-22
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Granted: 1971-12-28
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Expires: 1990-10-22
Abstract
Abstract A burglar alarm switch is mounted on an object to be protected. It comprises a vibration producer for converting any tilting movement of the object into vibrations and a piezoelectric element associated therewith for transducing the vibrations into an electric warning voltage.
Inventors
- 👤 Tatsuji Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1436
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
128 words
A burglar alarm switch comprising 1. a piezoelectric element having output terminal means; 2. a concave race defining a support surface; 3. a ball having a contact surface and being arranged for free rolling movement on the concave race, a. at least one of the surfaces being rough; 4. means fixedly mounting the concave race on the piezoelectric element, b. angular movement of the race in relation to the ball causing the contact surface of the ball to move over the support surface of the race so as to produce vibrations, and said vibrations being transduced by the piezoelectric element to produce an output voltage at the terminal means; and 5. means connected to the terminal means for producing an alarm signal in response to said output voltage.
Claim 2
Dependent Claim
128 words
A burglar alarm switch comprising 1. a piezoelectric element having output terminal means; 2. a concave race defining a support surface; 3. a ball having a contact surface and being arranged for free rolling movement on the concave race, a. at least one of the surfaces being rough; 4. means fixedly mounting the concave race on the piezoelectric element, b. angular movement of the race in relation to the ball causing the contact surface of the ball to move over the support surface of the race so as to produce vibrations, and said vibrations being transduced by the piezoelectric element to produce an output voltage at the terminal means; and 5. means connected to the terminal means for producing an alarm signal in response to said output voltage.
Claim 3
Dependent Claim
7 words
a concave race defining a support surface;
Claim 4
Dependent Claim
7 words
a concave race defining a support surface;
Claim 5
Dependent Claim
19 words
The burglar alarm switch of claim 1, wherein the concave race is a roughened inner face of a hemisphere.
Claim 6
Dependent Claim
17 words
The burglar alarm switch of claim 2, further comprising a mating hemisphere positioned over the first-mentioned hemisphere.
Claim 7
Dependent Claim
26 words
a ball having a contact surface and being arranged for free rolling movement on the concave race, a. at least one of the surfaces being rough;
Claim 8
Dependent Claim
26 words
a ball having a contact surface and being arranged for free rolling movement on the concave race, a. at least one of the surfaces being rough;
Claim 9
Dependent Claim
61 words
means fixedly mounting the concave race on the piezoelectric element, b. angular movement of the race in relation to the ball causing the contact surface of the ball to move over the support surface of the race so as to produce vibrations, and said vibrations being transduced by the piezoelectric element to produce an output voltage at the terminal means; and
Claim 10
Dependent Claim
61 words
means fixedly mounting the concave race on the piezoelectric element, b. angular movement of the race in relation to the ball causing the contact surface of the ball to move over the support surface of the race so as to produce vibrations, and said vibrations being transduced by the piezoelectric element to produce an output voltage at the terminal means; and
Claim 11
Dependent Claim
22 words
The burglar alarm switch of claim 1, wherein the concave race is a roughened inner face of a relatively flat, dished member.
Claim 12
Dependent Claim
19 words
The burglar alarm switch of claim 1, wherein the concave race is the inner face of a curvilinear loop.
Claim 13
Dependent Claim
17 words
means connected to the terminal means for producing an alarm signal in response to said output voltage.
Claim 14
Dependent Claim
17 words
means connected to the terminal means for producing an alarm signal in response to said output voltage.
Claim 15
Dependent Claim
14 words
The burglar alarm switch of claim 1, wherein the ball is of ferromagnetic material.
Claim 16
Dependent Claim
31 words
The burglar alarm switch of claim 1, wherein the means fixedly mounting the concave race on the piezoelectric element is a mount capable of transmitting the vibrations to the piezoelectric element.
Claim 17
Dependent Claim
24 words
The burglar alarm switch of claim 1, further comprising a vibration absorber, and means for fixedly mounting the piezoelectric element on the vibration absorber.
Claim 18
Dependent Claim
24 words
The burglar alarm switch of claim 8, wherein the last-named means comprises a baseplate attached to the vibration absorber and supporting the piezoelectric element.
Claim 19
Dependent Claim
17 words
The burglar alarm switch of claim 9, wherein the piezoelectric element is resiliently supported on the baseplate.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |