Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-04-08
1998-10-20
Hofsass, Jeffery A.
Communications: electrical
Condition responsive indicating system
Specific condition
137 783, 116173, 73 73, 340601, 340604, G08B 2100
Patent
active
058252959
ABSTRACT:
A device for signaling a predetermined soil moisture condition includes a switching tensiometer that closes a switch when the root water tension reaches a predetermined level; a power source connected to the switching tensiometer; and a signal connected to the switching tensiometer so that when the switching tensiometer closes the switch, power source is connected to the signal operate the signal to indicate that the predetermined soil moisture condition has been reached. The signal preferably includes a spring-loaded flag that operates between a retracted position and an extended signal position; a latch for releasably securing the flag in its retracted position, and an electrically operated release that releases the latch to allow the flag to operate to its extended signal position.
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Casady William Walter
Stevens William Eugene
Hofsass Jeffery A.
Huang Sihong
The Curators of the University of Missouri
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