초록 ▼

A proximity sensing apparatus comprising a capacitor and means for detecting the change in capacitance of the capacitor. The capacitor comprises two capacitive elements that are insulated from each other and are relatively movable. With at least one of the capacitive elements formed from an electric

A proximity sensing apparatus comprising a capacitor and means for detecting the change in capacitance of the capacitor. The capacitor comprises two capacitive elements that are insulated from each other and are relatively movable. With at least one of the capacitive elements formed from an electrically conducting liquid. The capacitance detecting means operate as a switch in response to the change in capacitance producing a binary output. This output being combined with a series of other outputs from a series of such proximity sensors to form an apparatus to determine position of an object, particularly a liquid level.

대표청구항 ▼

[ I claim:] [11.] A proximity sensor apparatus comprising a capacitor and means for detecting the change in capacitance of the capacitor, said capacitor comprising two capacitive elements and insulation means, said elements being movable relative to each other and being insulated from each other by

[ I claim:] [11.] A proximity sensor apparatus comprising a capacitor and means for detecting the change in capacitance of the capacitor, said capacitor comprising two capacitive elements and insulation means, said elements being movable relative to each other and being insulated from each other by said insulation means, at least one of the capacitive elements being formed by an electrically conducting liquid, the other capacitive element forming a unit with said means for detecting, said other capacitive element and said means for detecting being associated with one another on a common support member to minimize the distance between them.