Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-08-18
1996-12-31
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
340572, G08B 1314
Patent
active
055898190
ABSTRACT:
A self-sounding tag alarm apparatus having a tag type main body attached to a commodity and automatically operable to sound an alarm when an attempt is made to steal the commodity. The apparatus includes a coupling such as a wire, pin or the like for detachably attaching the main apparatus body to the commodity, an alarm generator mounted in the main apparatus body, a detector for detecting a signal of a particular frequency produced externally of the main apparatus body and removal of the coupling, a reset signal intake device for taking into the main apparatus body a reset signal applied externally of the main apparatus body, and an alarm control device for rendering the alarm generator operative based on a detection signal received from the detector, and rendering the alarm generator inoperative based on the reset signal received from the reset signal intake device.
REFERENCES:
patent: 4573042 (1986-02-01), Boyd et al.
patent: 4812811 (1989-03-01), Asbrink et al.
patent: 4851815 (1989-07-01), Enkelmann
patent: 4992776 (1991-02-01), Crossfield
patent: 5245317 (1993-09-01), Chidley et al.
Mullen Thomas
Takeda Technological Research Co., Ltd.
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