US4414541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion sensing system
Assignee: UNGO SECURITY Corp
•
Filing: 1981-05-29
•
Granted: 1983-11-08
•
Expires: 2001-05-29
Abstract
Abstract A motion sensing system which can be oriented in any position and which provides an output signal when it is moved or tilted. The system includes an oscillator which provides an output signal; the amplitude of the oscillator signal is modulated responsive to motion. A signal level detector provides an output signal when the modulation amplitude exceeds a predetermined level. The output signal from the level detector indicates excessive motion and can be used to provide an alarm or to control associated equipment.
Inventors
- 👤 Eugene Y. Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:19
CPC Classifications
G; G01; G01P; G01P13/00; G08; G08B; G08B13/00; G08B13/02; G08B13/14; G08B13/1436; Y; Y10; Y10S; Y10S73/00; Y10S73/01
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
Apparatus for detecting motion of an object on which it is placed comprising: an oscillator including a tuned circuit providing oscillations, motion responsive means in said apparatus coupled to said tuned circuit and serving to move and modulate the amplitude of the oscillations of said oscillator responsive to motion of the object, and means connected to said oscillator to receive the oscillations and provide an output signal when the amplitude modulation of the oscillations exceeds a predetermined amount.
Claim 2
Dependent Claim
78 words
Apparatus for detecting motion of an object on which it is placed comprising: an oscillator including a tuned circuit providing oscillations, motion responsive means in said apparatus coupled to said tuned circuit and serving to move and modulate the amplitude of the oscillations of said oscillator responsive to motion of the object, and means connected to said oscillator to receive the oscillations and provide an output signal when the amplitude modulation of the oscillations exceeds a predetermined amount.
Claim 3
Dependent Claim
20 words
An apparatus as in claim 1 in which said oscillator includes a current limited amplifier connected to said tuned circuit.
Claim 4
Dependent Claim
31 words
An apparatus as in claim 1 in which said tuned circuit includes an inductance and said motion responsive means is coupled to said inductance to introduce losses into said tuned circuit.
Claim 5
Dependent Claim
31 words
An apparatus as in claim 2 in which said tuned circuit includes an inductance and said motion responsive means is coupled to said inductance to introduce losses into said tuned circuit.
Claim 6
Independent Claim
101 words
An apparatus for detecting motion of an object on which it is placed comprising: an oscillator including a tuned circuit providing output oscillations, motion responsive means in said apparatus coupled to said tuned circuit to move and modulate the amplitude of the oscillations responsive to motion of the object, an envelope detector connected to said oscillator to receive the oscillations and provide an output signal whose amplitude is representative of the amplitude of the oscillations, means for receiving said output signal and provide an alarm signal when the amplitude of said output signal falls outside a predetermined upper or lower level.
Claim 7
Independent Claim
101 words
An apparatus for detecting motion of an object on which it is placed comprising: an oscillator including a tuned circuit providing output oscillations, motion responsive means in said apparatus coupled to said tuned circuit to move and modulate the amplitude of the oscillations responsive to motion of the object, an envelope detector connected to said oscillator to receive the oscillations and provide an output signal whose amplitude is representative of the amplitude of the oscillations, means for receiving said output signal and provide an alarm signal when the amplitude of said output signal falls outside a predetermined upper or lower level.
Claim 8
Dependent Claim
21 words
An apparatus as set in claim 5 in which said oscillator includes a current limited amplifier connected to said tuned circuit.
Claim 9
Dependent Claim
31 words
An apparatus as in claim 5 in which said tuned circuit includes an inductance and said motion responsive means is coupled to said inductance to introduce losses into said tuned circuit.
References Cited (Backward Citations)
US2154260A
Cited
US3602806A
Cited
US3658052A
Cited
US3747012A
Cited
US4164075A
Cited
US4001718A
Cited
US4028567A
Cited
US4106000A
Cited
US4110741A
Cited
US4053849A
Cited
US4267522A
Cited
US4286261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |