Abstract: A signal strength meter/indicator for use with an over-the-air broadcast television signal receiving antenna includes an input bandpass filter circuit, a first preamplifier circuit, a controllable variable attenuator circuit, a second preamplifier circuit, a splitter, an output bandpass filter circuit, a VHF/UHF filter circuit, a power detector circuit, a microcontroller and a display. The microcontroller, the controllable variable attenuator circuit, the second preamplifier circuit, the splitter, the VHF/UHF filter circuit and the power detector circuit together define an AGC circuit which adjustably controls the power level of an output signal provided to a television.

Abstract: A signal strength meter/indicator for use with an over-the-air broadcast television signal receiving antenna includes an input bandpass filter circuit, a first preamplifier circuit, a controllable variable attenuator circuit, a second preamplifier circuit, a splitter, an output bandpass filter circuit, a VHF/UHF filter circuit, a power detector circuit, a microcontroller and a display. The microcontroller, the controllable variable attenuator circuit, the second preamplifier circuit, the splitter, the VHF/UHF filter circuit and the power detector circuit together define an AGC circuit which adjustably controls the power level of an output signal provided to a television.

Abstract: A system for detecting a gas, oil or water leak and closing a fluid valve in response thereto includes a control unit in which an electronic circuit is mounted. A fluid leak sensor is electrically connected to the electronic circuit. A manipulator unit is operatively coupled to the fluid valve. The fluid leak sensor generates a fluid leak detection signal when a fluid leak is detected. The electronic circuit, in response to the fluid leak detection signal, generates a control signal and provides the control signal to the manipulator unit which, in response to the control signal, causes the fluid valve to close.

Abstract: An antenna device includes a housing defining an interior cavity, a UHF antenna element, two VHF antenna elements and two WiFi antenna elements. The antenna elements are mounted to the housing and are selectively adjustable between a vertical, upright position and a folded, horizontal position. The antenna elements are situated on the housing to provide an omni-directional antenna pattern for receiving broadcast signals. Antenna circuitry provided within the interior cavity of the housing receives signals from the antenna elements and generates an output signal that is provided to at least one output connector mounted on the housing or on one or more signal cables extending therefrom and to an external electronic device connected thereto.

Abstract: An antenna system for receiving over-the-air broadcast television signals includes a steerable directional antenna, a pedestal on which the directional antenna is rotatably mounted, a stepper motor to effect rotation of the steerable directional antenna, and a control circuit. The control circuit receives a control signal and causes the stepper motor to effect rotation of the steerable directional antenna. The directional antenna is steered such that its main lobe is generally directed to a television signal transmitting antenna selected by the user of the antenna system. The steering of the directional antenna is based on geographic location information associated with the television signal transmitting antenna.

Abstract: A retractable antenna assembly includes a planar antenna and a retraction mechanism. The planar antenna is affixed to the retraction mechanism and is selectively extendable and retractable therefrom. The planar antenna includes an antenna element having one or more antenna element segments. The retraction mechanism includes an elongated main body that is operatively coupled to at least two end brackets that mount the retraction mechanism to a supporting structure. The elongated main body includes a tubular sidewall having an outer surface that defines an interior space in which a cable and a preamplifier circuit are situated.

Abstract: A system for detecting a gas, oil or water leak and closing a fluid valve in response thereto includes a control unit in which an electronic circuit is mounted. A fluid leak sensor is electrically connected to the electronic circuit. A manipulator unit is operatively coupled to the fluid valve. The fluid leak sensor generates a fluid leak detection signal when a fluid leak is detected. The electronic circuit, in response to the fluid leak detection signal, generates a control signal and provides the control signal to the manipulator unit which, in response to the control signal, causes the fluid valve to close.

Abstract: An antenna stand for holding a flexible or non-flexible planar antenna includes a base and support frame. The support frame includes two spaced apart legs and a horizontal cross member interposed therebetween. At least two lower antenna supports are provided on the support frame on which the bottom edge of the planar antenna may rest. An optional extendable antenna holding arm includes an upper antenna clip that engages the top edge of the planar antenna. The extendable antenna holding arm support is adjustably mounted to the support frame so that the distance between the lower antenna supports and the upper antenna clip can be varied to accommodate planar antennas of varying dimensions. The support frame may be arcuately shaped transversely to impart a slight lateral bend to a flexible planar antenna mounted on the stand. This helps to maintain the flexible planar antenna in an upright position on the stand.

Abstract: An antenna system for receiving over-the-air broadcast television signals includes a steerable directional antenna, a pedestal on which the directional antenna is rotatably mounted, a stepper motor to effect rotation of the steerable directional antenna, and a control circuit. The control circuit receives a control signal and causes the stepper motor to effect rotation of the steerable directional antenna. The directional antenna is steered such that its main lobe is generally directed to a television signal transmitting antenna selected by the user of the antenna system. The steering of the directional antenna is based on geographic location information associated with the television signal transmitting antenna.

Abstract: A stability attachment for a personal transportation vehicle includes a frame, a clamp mechanism and a pair of training wheels. The frame includes a first support arm and a second support arm. The first and second support arms are interconnected by the clamp mechanism. Each of the training wheels is situated on opposite sides of the frame and vertically adjustable thereon. The frame is selectively mounted to the main body of the personal transportation vehicle on which the operator stands by the clamp mechanism. The clamp mechanism is adjustable so that the stability attachment can be mounted to personal transportation vehicles of various sizes. Each of the support arms includes at least two telescoping members so that the overall length of the support arm can be adjusted.

Abstract: A stability attachment for a personal transportation vehicle includes a frame, a clamp mechanism and a pair of training wheels. The frame includes a first support arm and a second support arm. The first and second support arms are interconnected by the clamp mechanism. Each of the training wheels is situated on opposite sides of the frame and vertically adjustable thereon. The frame is selectively mounted to the main body of the personal transportation vehicle on which the operator stands by the clamp mechanism. The clamp mechanism is adjustable so that the stability attachment can be mounted to personal transportation vehicles of various sizes. Each of the support arms includes at least two telescoping members so that the overall length of the support arm can be adjusted.

Abstract: An antenna device includes a housing defining an interior cavity, a UHF antenna element, two VHF antenna elements and two WiFi antenna elements. The antenna elements are mounted to the housing and are selectively adjustable between a vertical, upright position and a folded, horizontal position. The antenna elements are situated on the housing to provide an omni-directional antenna pattern for receiving broadcast signals. Antenna circuitry provided within the interior cavity of the housing receives signals from the antenna elements and generates an output signal that is provided to at least one output connector mounted on the housing or on one or more signal cables extending therefrom and to an external electronic device connected thereto.