US4012732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security device
Assignee: Individual
•
Filing: 1976-03-19
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Granted: 1977-03-15
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Expires: 1996-03-19
Abstract
Abstract A security device includes an alarm that is actuated after a predetermined period of no human physical activity, which device includes a clock set to actuate the alarm after a predetermined period of inactivity, an activity sensor that resets the clock when human activity is sensed, and a means to sense an inanimate object, such as a set of keys, and which, when the inanimate object is absent, will not actuate the alarm when the predetermined time period has passed. There is also disclosed means to actuate the alarm when any activity is sensed if the inanimate object is absent.
Inventors
- 👤 Kennan C. Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/02; G08B21/04; G08B21/0407; G08B21/0415; G08B13/00; G08B21/0438; G08B21/0469
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A security device comprising: a. an alarm, b. a clock adapted to actuate said alarm when a predetermined time period has elapsed, c. a human physical activity sensor adapted to reset said clock to the beginning of said predetermined time period when human activity is sensed, and d. means for sensing an inanimate object in contact therewith, said means adapted in the absence of said inanimate object to prevent actuation of said alarm when said predetermined time period has elapsed.
Claim 2
Dependent Claim
80 words
A security device comprising: a. an alarm, b. a clock adapted to actuate said alarm when a predetermined time period has elapsed, c. a human physical activity sensor adapted to reset said clock to the beginning of said predetermined time period when human activity is sensed, and d. means for sensing an inanimate object in contact therewith, said means adapted in the absence of said inanimate object to prevent actuation of said alarm when said predetermined time period has elapsed.
Claim 3
Dependent Claim
39 words
The device of claim 1 wherein said means to sense an inanimate object is adapted, in the absence of said inanimate object, to cause said human physical activity sensor to activate said alarm when human physical activity is sensed.
Claim 4
Dependent Claim
18 words
The device of claim 1 wherein said clock comprises a source of power line frequency and a counter.
Claim 5
Dependent Claim
40 words
The device of claim 3, further comprising an oscillator of a frequency higher than said power line frequency wherein the absence of said inanimate object causes said high frequency oscillator to drive said counter when human physical activity is sensed.
Claim 6
Dependent Claim
15 words
The device of claim 4 further comprising a manual switch activate said high frequency oscillator.
Claim 7
Dependent Claim
12 words
The device of claim 1 wherein said inanimate object is a key.
Claim 8
Dependent Claim
23 words
The device of claim 1 wherein said inanimate object is metal, and said means for sensing an inanimate object is an induction-actuated circuit.
Claim 9
Dependent Claim
24 words
The device of claim 1 wherein said inanimate object is metal, and said means for sensing an inanimate object is a capacitance actuated 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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |