ALARM

ALARM

PROBLEM TO BE SOLVED: To disclose an alarm having a structure capable of adjusting a length of a portion, of an antenna, led out of a case. SOLUTION: Regarding an antenna 7 having an externally led-out portion led out of a case 6, the externally led-out portion is covered by covering a metal wire wi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SHIBATA KIWAMU, OKUNO HIROHISA, MATSUMOTO KAZUHIRO, YAMATO HIROHARU
Format: Patent
Sprache:eng
Schlagworte:
ALARM SYSTEMS
ANTENNAS, i.e. RADIO AERIALS
BASIC ELECTRIC ELEMENTS
ELECTRICITY
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To disclose an alarm having a structure capable of adjusting a length of a portion, of an antenna, led out of a case. SOLUTION: Regarding an antenna 7 having an externally led-out portion led out of a case 6, the externally led-out portion is covered by covering a metal wire with an antenna housing part 64 protruded from a side wall 61 of the case 6 and an antenna housing 70 inserted into the antenna housing part 64. Thus, by sliding the antenna housing 70 with respect to the antenna housing part 64, the metal wire covered with the antenna housing 70 is extended or contracted, thereby changing a length and sensitivity of the antenna 7. COPYRIGHT: (C)2009,JPO&INPIT