Method and apparatus for the protection of people or objects
OwnerEduard Kuhnertinventor
Life of this patent
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Abstract
An alarm signal is triggered in the event of a prohibited approach or removal of people or objects which affords reliable and unobtrusive protection of such people or objects while retaining unhindered mobility. A signal is transmitted by a transmitter 14 which causes the blockage of an alarm signal until the distance between the transmitter 14 and the receiver 2 is greater or smaller than a predetermined value or the transmission between the transmitter 14 and the receiver 2 is interrupted. It is also possible to gain a representative distance signal corresponding to the distance between the two security elements which causes a corresponding change of pitch or volume of the alarm signal.
Claims10
A method of protecting people or objects by which an alarm signal is triggered in case of a prohibited approach or removal of people or objects comprising the steps of transmitting a signal, by a transmitter to a receiver determining therefrom a distance signal representative of the distance between the transmitter and the receiver;
- blocking the actuation of an alarm signal until the distance signal is decreased to or exceeds a predetermined value, or the transmission between the transmitter and the receiver is interrupted;
- and the method being characterized in that the distance signal causes a corresponding variation in pitch or volume of the actuated alarm signal.
An apparatus for the protection of people or objects with a first security element (1), which is attachable to an object or a person, and a portable and arbitrarily fastenable second security element (9) wherein a wireless connection between the first and second security elements exists, and a device to give an alarm actuated by a change of distance between the two security elements or by an interruption of the connection, characterized in that the first security element (1) comprises a transmitter (19), a corresponding receiver (20) located in the second security element (9) being connected to a second device to give an alarm (24), the second security element (9) further comprising means (32) for producing a distance signal corresponding to the distance between the receiver (20) and the transmitter (19) to give an alarm (24), and a modulation circuit (33) to modulate a second alarm signal with said distance signal.
A method of protecting people or objects by which an alarm signal is triggered in case of a prohibited approach or removal of people or objects comprising the steps of transmitting a signal by a transmitter to a receiver;
- determining therefrom a distance signal representative of the distance between the transmitter and the receiver;
- blocking the actuation of an alarm signal until a distance signal corresponding to the distance between the transmitter and the receiver is determined and compared to a preadjustable reference value and a positive or negative deviation from the reference value causes the release of the alarm signal, and the method being characterized in that the distance signal causes a corresponding variation in pitch or volume of the actuated alarm signal.
Dependencies are inferred from the claim text.