Title:
ANTITHEFT DEVICE FOR ON-BOARD TYPE ACOUSTIC APPARATUS
Document Type and Number:
Japanese Patent JPS62113630
Kind Code:
A
Abstract:
PURPOSE:To make it possible to use arbitrary codes, by providing a comparing means for comparing an input code with a previously stored code and a means for detecting the operation of the back-up power source so that the operation of an acoustic apparatus is inhibited when a back-up power source is turned on but the operation of the acoustic apparatus is initiated in accordance with an output signal from the comparator means. CONSTITUTION:When a radio power source switch 6 and a mode change-over switch 7 are turned on, a steal-proof device is operated. In this condition a code is inputted through key switches 3, and after inputting of the code, the mode change-over switch 7 is turned off. At this time the code is stored in a RAM 22. Thereafter, even if an acoustic device set is removed, the code is held in the RAM 22. When the set is again mounted, the set may not be operated. However, the set may come to return to its normal condition when the above-mentioned code is inputted. Thus, it is possible to set the code to an arbitrary one.
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Inventors:
NAKASAKI TOSHIYUKI
Application Number:
JP25313185A
Publication Date:
May 25, 1987
Filing Date:
November 12, 1985
Export Citation:
Assignee:
CLARION CO LTD
International Classes:
B60R11/02; G08B15/00; (IPC1-7): B60R11/02; G08B15/00
Attorney, Agent or Firm:
Takesaburo Nagata