Communications: electrical – Selective – Having indication or alarm
Patent
1986-12-24
1988-07-19
Crosland, Donnie L.
Communications: electrical
Selective
Having indication or alarm
340568, 340571, 70158, 70160, 455345, 455346, 455348, 455 90, 307 10AT, B60R 2500
Patent
active
047588179
ABSTRACT:
An acoustic apparatus such as a radio receiver and tape player is mounted into an interior panel such as a dashboard of an automobile. The acoustic apparatus includes a housing having a size insertable into an aperture formed in the interior panel. The housing is inserted through the aperture from the front side of the interior panel and is firmly attached to the interior panel by manually actuating mount knobs provided in the front of the housing. A theft detecting circuit arrangement including a switch operable from the front side of the housing is provided in the housing and protective members are provided for covering the mount knobs. The protective members include operating plates for operating the switch. Upon the detachment of the protective member, the electric circuit arrangement is actuated to produce a warning signal to prevent the detachment of the acoustic apparatus from the interior panel without permission.
REFERENCES:
patent: 4211976 (1980-07-01), Inoue
patent: 4211995 (1980-07-01), Smith
patent: 4248069 (1981-02-01), Burbank
patent: 4494114 (1985-01-01), Kaish
Adams Bruce L.
Crosland Donnie L.
Shintom Kabushiki Kaisha
Wilks Van C.
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