Source: http://www.google.com/patents/US5054119?dq=7,453,150
Timestamp: 2017-02-24 10:24:15
Document Index: 220359601

Matched Legal Cases: ['art 2', 'art 3', 'art 4', 'art 26', 'art 26', 'art 25', 'art 26', 'art 26', 'art 26', 'art 26']

Patent US5054119 - Anti-theft system for a radio receiver used particularly in a motor vehicle - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe present invention relates to a system for receiving radio-waves used in a motor vehicle. The system is characterized in that it comprises an amplification unit (3) presenting a housing (5) of a removable tuner control part (4) which, when introduced in the housing (5) is electrically connected to...http://www.google.com/patents/US5054119?utm_source=gb-gplus-sharePatent US5054119 - Anti-theft system for a radio receiver used particularly in a motor vehicleAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5054119 APublication typeGrantApplication numberUS 07/381,645PCT numberPCT/FR1988/000505Publication dateOct 1, 1991Filing dateOct 12, 1988Priority dateOct 12, 1987Fee statusLapsedAlso published asCA1294333C, DE3889192D1, DE3889192T2, EP0312456A1, EP0312456B1, WO1989003325A1Publication number07381645, 381645, PCT/1988/505, PCT/FR/1988/000505, PCT/FR/1988/00505, PCT/FR/88/000505, PCT/FR/88/00505, PCT/FR1988/000505, PCT/FR1988/00505, PCT/FR1988000505, PCT/FR198800505, PCT/FR88/000505, PCT/FR88/00505, PCT/FR88000505, PCT/FR8800505, US 5054119 A, US 5054119A, US-A-5054119, US5054119 A, US5054119AInventorsMarie-Christine RollandOriginal AssigneeRolland Marie ChristineExport CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (2), Referenced by (10), Classifications (12), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetAnti-theft system for a radio receiver used particularly in a motor vehicle
US 5054119 AAbstract
The present invention relates to a system for receiving radio-waves used in a motor vehicle. The system is characterized in that it comprises an amplification unit (3) presenting a housing (5) of a removable tuner control part (4) which, when introduced in the housing (5) is electrically connected to the amplification unit (3) in order to make the reception system operative. The present invention applies particularly to the protection against theft of car radios.
1. A radio receiving system used in an automotive vehicle, comprising: an amplifying unit for amplifying audio signals, fixed, in an inviolable manner, to a rear face of a dashboard of the vehicle and a tuner control unit for controlling the acquisition and the selection of radio waves, said tuner control unit being removably secured to said amplifying unit, the system further including means for electrically connecting said tuner control unit to said amplifying unit, said tuner control unit including a casing being in the shape of a flat parallelepiped and being approximately equal in size to a credit card, said amplifying unit including a housing having an opening that is complementary in shape to the shape of the tuner control unit, said tuner control unit being insertable through a rectangular opening in the dashboard and into said amplifying unit housing opening to electrically connect said tuner control unit to said amplifying unit, said tuner control unit includes a part which carries control elements for searching for particular radio wave frequencies and for selecting radio waves and a device for displaying the status of the radio system, when said tuner control unit is inserted into said amplifying unit said part of said tuner control unit extends from said amplifying unit so as to be visibly external thereto, said electrical connecting means comprising first and second connecting elements, said first connecting elements being provided directly on the casing of the tuner control unit side by side at the rearwards part of the casing opposite to the external visible part, said second connecting elements being provided within the amplifying unit housing such that said second connecting elements faces said first connecting elements when said tuner control unit is inserted in said amplifying unit housing opening to transmit signals between said tuner control and amplifying units, said first and second connecting elements form a capacitive coupling-type connection for transmitting high frequency signals coming from an antenna to high frequency circuits of the tuner control unit, a capacitive coupling-type connection for transmitting low frequency signals from the tuner control unit to a low frequency amplifier of the amplifying unit, an electromagnetic coupling-type connection for the power supply of the tuner control unit, said capacitive-type connection for transmitting high frequency signals comprises two capacitors each formed of two metal plates disposed opposite to each other when the tuner control unit is positioned inside said amplifying unit housing, one of said capacitors being positioned in said amplifying unit and the other of said capacitors being positioned in said tuner control unit, said capacitors being separated by a plate made from a dielectric material and fixed to the tuner control unit.
The present invention relates to a thief-proof system for radio receivers used in particular in an automotive vehicle.
The present invention provides a system dissuading any people from coveting a radio receiver mounted inside an automotive vehicle.
For fuller understanding of the invention, reference is made to the following description taken in conjunction with the accompanying drawings, in which:
Referring to FIGS. 1 to 5, a radio receiver 1 is mounted on a stationary part 2 of a vehicle constituted for example by the dashboard thereof. The radio receiver 1 comprises two separated parts, one part 3 forming a frame or amplifying unit solid in an inviolable manner, for example by fastening screws (not shown), with the rear face of the dashboard 2 and one part 4 for controlling the taking and the selection of AM or FM radio waves or tuner control unit with digital control keys 4a for example of the touch contact type for searching for frequencies and for selecting the radio waves and with a display device 4b, in particular with liquid crystals, for the searched for frequencies and stations. The tuner control unit 4 is removably mounted in the supply unit 3 and is in the shape of a right angled parallelepipedic flat casing having sizes similar to the sizes of a payment card or a credit card and likely to be engaged in a central housing 5 having a shaped conjugate to that of the amplifying unit 3. In order to permit inserting the unit 4 inside the housing 5, the dashboard 2 comprises a rectangular opening 6 located opposite the housing 5. The tuner control unit 4, when arranged longitudinally inside housing 5, leaves outside and therefore visible about one third of its surface so that the control keys 4a be accessible and that the display device 4b in particular for the selected frequency and the AM or FM wave range chosen, be also visible, the keys 4a and the display device 4b being located on the upper face of unit 4. This surface portion of unit 4 which protrudes outwardly is carried by a pedestal 7 made of hard rubber solid with the front face of the dashboard 2.
FIG. 8 shows a mechanical device permitting pressing the rear part of tuner control unit 4 in order to maintain it in position and to perfectly ensure the capacitive and electromagnetic couplings described above once unit 4 in position of use inside its corresponding housing 5. The bottom of the latter terminates by a cavity 5b whose upper wall presents a cross-section substantially in the shape of an arc of a circle and adapted to permit the tilting about its longitudinal axis X-X' of a heel-forming part 26, forming part of the above-mentioned mechanical device, and provoked by the introduction of unit 4 at the bottom 5b of its housing 5. The heel-forming part 26 is shown in dotted line in inactive position inclined at about 45° with respect to the horizontal, and is maintained in this position by a return spring 27 fastened at one of its ends to an elongated lower semi-cylindrical part forming a stop 26a of the heel-forming part 25 and at its other opposite end to a stationary point of the amplifying unit 3. The semi-cylindrical part 26a is connected to an elongated parallelepipedic part 26b perpendicular to the part 26a and of which one lower plane phase 26b1 rests on the upper face of the end part of the control unit 4 in the active position of the heel-forming part 26.
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