Patent US3668675A successfully refreshed from Google Patents.
US3668675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote alarm system
Assignee: Individual
•
Filing: 1970-04-03
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Granted: 1972-06-06
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Expires: 1990-04-03
Abstract
Abstract A vehicle alarm system is disclosed which incorporates an acceleration-sensitive pendulum connected to a relay operated radio transmitter so as to signal silently to a remote station any movement of the vehicle on which the apparatus is magnetically mounted. A charge storage circuit in parallel with the relay keeps the transmitter on for about a 1 second interval.
Inventors
- 👤 Allan D Joens
- 👤 Robert W Johnson
- 👤 Michael Riggle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:29
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/102; G; G08; G08B; G08B13/00; G08B13/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A portable alarm system comprising in combination: a housing adapted to support the alarm system; means for mounting said housing in a predetermined attitude irrespective of the oRientation of the surface to which the housing is mounted; indicating means on said housing adapted to indicate when said housing is in said predetermined attitude; an acceleration sensitive switch means in said housing, said switch means resting in a nonconducting position when said housing is in said predetermined attitude; activation means; a relay means operable to be activated by said activation means and said switch means; radio transmitting means adapted to have its output signal modified by said relay means when said relay means is activated; radio receiving means operable to sense transmissions from said transmitting means and modifications thereof at a remote location; and charge storage means comprising a capacitor circuit in parallel with said relay means connected to said acceleration sensitive switch means and to said relay means operable to keep said relay means activated for a short interval of duration in the range of about a second upon initial activation by said switch means.
Claim 2
Dependent Claim
185 words
A portable alarm system comprising in combination: a housing adapted to support the alarm system; means for mounting said housing in a predetermined attitude irrespective of the oRientation of the surface to which the housing is mounted; indicating means on said housing adapted to indicate when said housing is in said predetermined attitude; an acceleration sensitive switch means in said housing, said switch means resting in a nonconducting position when said housing is in said predetermined attitude; activation means; a relay means operable to be activated by said activation means and said switch means; radio transmitting means adapted to have its output signal modified by said relay means when said relay means is activated; radio receiving means operable to sense transmissions from said transmitting means and modifications thereof at a remote location; and charge storage means comprising a capacitor circuit in parallel with said relay means connected to said acceleration sensitive switch means and to said relay means operable to keep said relay means activated for a short interval of duration in the range of about a second upon initial activation by said switch means.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 in which said activation means comprises a diode controlled electronic switching means in series with said relay means which diode is controlled by a capacitor charging circuit.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 in which said electronic switching means comprises a silicon controlled rectifier.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 in which said means for mounting comprises a magnetic mount connected to said housing through a swiveling ball joint.
Claim 6
Dependent Claim
25 words
The apparatus of claim 4 in which said acceleration sensitive means comprises a weighted, flexible, electrically conducting arm disposed between a pair of electrical contacts.
Claim 7
Dependent Claim
17 words
The apparatus of claim 5 in which said indicating means comprises a bubble level in said housing.
Claim 8
Dependent Claim
28 words
The apparatus of claim 6 in which said relay means comprises an electromagnetically operated switch, the coil of said switch connected in series with said acceleration sensitive means.
Claim 9
Dependent Claim
25 words
The apparatus of claim 7 including a switchable grounding circuit connected to said capacitor charging circuit for preventing activation of said rectifier by said diode.
Claim 10
Dependent Claim
29 words
The apparatus of claim 8 including a capacitive coupling to ground from the control input of said rectifier to prevent accidental switching due to transient voltages in the circuits.
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |