摘要:
In a device for automatically expanding and contracting antenna in which a rotary member such as a drum or a gear for moving a wire or a rope that works to expand and contract the antenna element, is rotated by a worm (1) and a worm wheel (2) that are driven by a motor, improvement wherein said worm wheel is formed as an intermediate gear unit that has a small-diameter gear unit (3) formed as a unitary structure and that engages with the gear (13) of said rotary member, said intermediate gear unit is allowed to move together with the gear unit support frame (4) that has switch operation unit with respect to a support shaft (9), a limit switch employing a reversing spring is provided in the power-feed circuits that supply power to said motor to turn it in the forward direction or in the reverse direction, resilient arm members (5, 5') are disposed on said limit switch, and said resilient arm members are operated by the switch operation units of said gear support frame.
摘要:
A multi-frequency antenna to be used commonly for reception of multiple different frequencies includes first (1) and second rods (2) extendably held by and through a third rod (3). The first rod is coupled to the second rod via a phase shifter (4) so that when the first and second rods are fully extended, the antenna behaves a high gain antenna for common use in AM, FM and car telephone system.
摘要:
A remote lighting control system is for remote lighting control of a plurality of discharge lamps This system has the installed electronic ballasts of each discharge lamp. Each electronic ballast has a transceiver and a controller, the transceiver exchanges control information with the controller. The control command contains the identifiable information to specify one of a plurality of electronic ballasts. When the transmitter is received the control command, the transceiver transfers the received control command to other electronic ballasts further, Moreover, if the control command is the one that the identifiable information specifies own ballasts, the control information based on the received control command is send to own controller, and the controller control the discharge lamp. According to this system, when a lot of lamps was arranged the factory etc. comparatively widely, the user's remote control is not limited to the narrow scope.
摘要:
A remote lighting control system is for remote lighting control of a plurality of discharge lamps This system has the installed electronic ballasts of each discharge lamp. Each electronic ballast has a transceiver and a controller, the transceiver exchanges control information with the controller. The control command contains the identifiable information to specify one of a plurality of electronic ballasts. When the transmitter is received the control command, the transceiver transfers the received control command to other electronic ballasts further, Moreover, if the control command is the one that the identifiable information specifies own ballasts, the control information based on the received control command is send to own controller, and the controller control the discharge lamp. According to this system, when a lot of lamps was arranged the factory etc. comparatively widely, the user's remote control is not limited to the narrow scope.
摘要:
A power antenna for automatically stopping an electric motor when a telescoping trouble occurs with the antenna to thereby cause a load of more than a predetermined magnitude to apply to the electric motor and properly preventing the electric motor from getting burnt and a telescopic operating mechanism from getting damaged, whereby the ocurrence of an erroneous operation of the antenna such as repeated shorten and expanding operations thereof can be controlled. A worm wheel (2) inside an antenna mechanism is pivotally supported in such a manner as to slide in an axial direction and an engagement groove (21) is formed in an annular fashion, and an operating portion (32) of a movable body (17) of a limit switch (30) provided in a driving circuit for the motor is brought into engagement with the engagement groove (21) of the worm wheel. In addition a columnar engagement body (34) adapted to be activated by an elastic member (7) is brought into engagement in a square groove type engagement recessed portion (33) of the movable body (17) within a height range which is not more than a radius of the columnar engagement body, and a cam portion (35) of a joint portion is disposed on the side of the square groove type engagement recessed portion of the movable body for keeping the engagement body (34) unlocked from the engagement recessed portion (33) when an abnormal operating force is generated relative to antenna elements.
摘要:
A power antenna for automatically stopping an electric motor when a telescoping trouble occurs with the antenna to thereby cause a load of more than a predetermined magnitude to apply to the electric motor and properly preventing the electric motor from getting burnt and a telescoping operating mechanism from getting damaged, whereby the occurrence of an erroneous operation of the antenna such as repeated shorten and expanding operations thereof can be controlled. A worm wheel (2) inside an antenna mechanism is pivotally supported in such a manner as to slide in an axial direction and an engagement groove (21) is formed in an annular fashion, and an operating portion (32) of a movable body (17) of a limit switch (30) provided in a driving circuit for the motor is brought into engagement with the engagement groove (21) of the worm wheel. In addition a columnar engagement body (34) adapted to be activated by an elastic member (7) is brought into engagement in a square groove type engagement recessed portion (33) of the movable body (17) within a height range which is not more than a radius of the columnar engagement body, and a cam portion (35) of a joint portion is disposed on the side of the square groove type engagement recessed portion of the movable body for keeping the engagement body (34) unlocked from the engagement recessed portion (33) when a abnormal operating force is generated relative to antenna elements.
摘要:
A roof antenna capable of receiving three kinds of bands, i.e., a FM radio band, an AM radio band, and a wireless-telephone band, includes an antenna element 10 having a structure that a conductor 15 winds around the insulator 16 in the form of a coil. A molded portion 14 is formed at the bottom of the antenna element, in which a trap coil is inserted. The electric length from the antenna top 11 to the internal metal fitting 17 at the lower end of the antenna element 10 is about a quarter of a FM radio wave. The electric length from the internal metal fitting 17 to the lower end of the trap coil 12 is about a quarter of a wireless telephone wave. A cover 19 supporting a basal part of the antenna element installs the first substrate 20 and the second substrate 21. The first substrate 20 and the second substrate 21 have a matching circuit, branching filters, and amplifiers.
摘要:
Un tel dispositif, qui comporte un membre rotatif, comme un tambour ou un mécanisme d'entraînement de fil ou de corde qui fait se déployer ou rentrer l'antenne, ledit membre rotatif tournant sous l'effet d'une vis sans fin (1) et d'une roue à vis (2) entraînées par un moteur, peut être amélioré de la manière suivante: la roue à vis prend la forme d'une unité d'entraînement intermédiaire comprenant une unité d'entraînement à faible diamètre (3) constituant une structure unique et qui s'engage avec l'élément d'entraînement (13) dudit membre rotatif, ladite unité d'entraînement intermédiaire pouvant tourner avec le cadre de support (4) de l'unité d'entraînement qui comprend une unité de commutation pour un arbre de support (9), un interrupteur-limiteur fonctionnant avec un ressort à renversement étant prévu dans les circuits d'alimentation qui fournissent du courant audit moteur pour le faire avancer ou reculer et des bras résilients (5, 5') étant disposés sur ledit interrupteur-limiteur et actionnés par les unités de commutation dudit cadre de support de l'unité d'entraînement.