Patent
Motion sensing system
TLDR
In this article, a motion sensing system which can be oriented in any position and which provides an output signal when it is moved or tilted is presented, where the amplitude of the oscillator signal is modulated responsive to motion.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.read more
Citations
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Patent
Automobile intruder alarm system
John M. DeFino,Neal G. Shields +1 more
TL;DR: In this article, an improved vehicle intruder alarm system includes a method of automatically arming an alarm system, which can be used to raise windows and turn on the vehicle headlights by remote control.
Patent
Capacity responsive control circuit
TL;DR: In this article, a capacitive detecting circuit for detecting transient capacitive changes such as that of a person moving into proximity of a sensing element is proposed, coupled to a threshold level controlled amplifier supplied with relatively high frequency signals from an oscillator through a high input impedance.
Patent
Alarm system for sensing and vocally warning a person approaching a protected object
TL;DR: In this paper, a proximity detector is used to detect the presence of a person sufficiently near a protected object, such as an automobile, to inflict damage to the object, and provide verbal warnings to the person.
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Remote control system suitable for a vehicle and having remote transmitter verification
TL;DR: In this paper, the transmitter verification is based on the number of learned remote transmitters, a change in that number, or a change of a learned code of a remote transmitter.
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Automotive driving condition alarm system
TL;DR: In this article, a system for monitoring and warning of dangerous driving conditions includes sensors mounted on the vehicle for detecting excessive moisture on the road surface, freezing temperature at the ground surface, vibration of the vehicle in both horizontal and vertical directions, excessive vehicular speed, and drowsiness of the driver of a vehicle.
References
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Patent
Linear oscillator for proximity sensor
TL;DR: In this paper, a proximity sensor oscillator, having a resonant circuit in which the power loss is inversely related to the distance of a conductive body from a probe containing a part of the resonant circuits, produces an oscillating output signal in the resonance with a peak amplitude that varies with power loss and distance.
Patent
Device for monitoring physical activity of persons
TL;DR: In this article, a displacement detector is used to supply a continuously variable signal dependent on the positional changes of the device, signal processing circuit receiving the signal and at least one alarm device operatively connected to the signal processing circuits to provide an alarm in the absence for longer than a predetermined time of a signal due to the monitored person's normal movements.
Patent
Breathing activity monitoring and alarm device
TL;DR: In this article, an activity detecting means for detecting the movement of an animate object which includes a permanent magnet attached to the object is presented, where a pickup coil is provided around the area of movement of the object so that movements of the magnet induce a voltage in the coil.
Patent
Oscillation means for generating a differential AC signal proportional to movement of a conducting member
Gerald S. Bower,Scott F. Voelker +1 more
TL;DR: In this paper, a high frequency pickoff is disclosed having two spaced inductors electrically connected in series and a capacitor connected in parallel with the inductors, thereby forming a parallel resonant circuit.
Patent
Electronic metering system
TL;DR: In this paper, a translating device, operating at a comparatively high energy level, is accurately controlled in response to a variable of low power magnitude, which relates to measuring and recording systems and similar apparatus.