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AssigneeEuro-Tech AS
InventorBjørn Lie
Estimating the term…
A device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox, comprising a detector for registering a change of state in the letterbox, which registration is transmitted to and activates a preferably remote display or the like in order to produce on the display a visual and/or audible message which signals that contents have been deposited in said letterbox. The detector is arranged in a preferably integrated mounting unit made in the form of an approximately U-shaped holder that accommodates a circuit board containing electronic components, a light transmitter, a light receiver, and wires and power supply, which unit is placed on the bottom of a container, preferably a letterbox, in such manner that the two upright legs of said holder rest against respective opposite walls of said letterbox. A detector and transmitter unit and a receiver-display unit are also described.
A device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox, comprising a detector for registering a change of state in the letterbox, which registration is transmitted to and activates a remote display in order to produce on the display a visual and/or audible message which signals that contents have been deposited in the letterbox, wherein the detector is arranged in an integrated mounting unit made in the form of a U-shaped holder that accommodates a circuit board containing electronic components, a light transmitter, a light receiver, and wires and a power supply which unit is placed on or at the bottom of a container, a letterbox, in such a manner that said two upright legs of said holder rest against respective opposite walls of said letterbox, and where light from said transmitter is transmitted through the inner space of said letterbox to said light receiver.
A detector-transmitter unit for use in a device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox, comprising a detector for registering a change of state in said letterbox, which registration is transmitted to and activates a remote display in order to produce on said display a visual and/or audible message which signals that contents have been deposited in said letterbox, which detector comprises a light emitting diode and a photodiode, or optionally an electronic sensor (inductive/capacitive), an ultrasonic sensor, a mechanical or electromagnetic switch means etc., wherein there is provided an oscillator, a timer to control the timing and a power source, an amplifier, a multivibrator or flip-flop having a first input and a second input and a code circuit having address code inputs and a high-frequency transmitter module, wherein said timer activates and pulses said detector-transmitter component for about 20 milliseconds with a period of about 40 seconds, and if said letterbox or container is empty, a detector-receiver component receives pulses from said transmitter component and the response thereto is relayed in the form of electrical signals to said amplifier;
A receiver-display unit for use in a device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox, comprising a detector for registering a change of state in said letterbox, which registration is transmitted to and activates a remote display in order to produce on said display a visual and/or audible message which signals that contents have been deposited in said letterbox, which detector comprises a light-emitting diode and a photodiode, or optionally an electronic sensor (inductive/capacitive), and ultrasonic sensor, a mechanical or electromagnetic switch means etc., wherein said receiver-display unit comprises a high-frequency receiver, a decoder, a monostable multivibrator or flip-flop and a display, where said display comprises a visual and/or audible signal means, and where said telegram on reaching said receiver is passed to said decoder that ascertains whether said telegram contains a valid receiver address and determines the logical state of the data or information;
Dependencies are inferred from the claim text.