Termite alarm unit
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United States of America Patent
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-
Nov 19, 1996
Grant Date -
N/A
app pub date -
Nov 3, 1994
filing date -
Jun 29, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cellulose-containing member is provided with a plurality of holes transversely extending therethrough. An emitting element and a receiving element are located at opposite ends, respectively, of each of the holes. The presence or absence of termites is detected by the obstruction of an output wave from the emitting element caused by termites invading the holes, whereupon a detection signal is generated to cause alarm lamps and so on to light up for alarm display. Simultaneously, in order to estimate the number of invading termites, the number of occurences of an obstruction by the termites of the output waves from the emitting elements is counted.
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