Measuring and testing – Volumetric content measuring
Patent
1975-04-30
1976-05-25
Ruehl, Charles A.
Measuring and testing
Volumetric content measuring
338 5, G01L 122
Patent
active
039584550
ABSTRACT:
Transducers of the resistance wire type are described, wherein strained resistance wires are adapted to function both as a sensor and load bearing member. These transducers comprise a pair of spaced apart load carrying or attaching devices which are connected by a plurality of lengths of resistance wire or filament, such as a coil, belt or rope of wire construction, in which the individual lengths of wire are mechanically parallel but are preferably connected in series electrically so as to form a continuous wire passing back and forth between and connecting the two load carrying or attaching elements. In a preferred embodiment, the ends of a length of wire rope, constructed of insulated wire, are held in, but insulated from, a pair of wire rope terminal fittings such as sockets; the individual lengths of wire of which the wire rope is composed are connected in series at their alternate ends, and suitable means such as lead wires are provided to connect the two ultimate ends of the serially connected wire in a conventional four-arm bridge circuit, whereby changes in the resistance of the wire which are induced by dimensional changes therein caused by forces applied to the terminal fittings may be measured.
REFERENCES:
patent: 2754107 (1956-07-01), Ernst et al.
patent: 3201735 (1965-08-01), Brown et al.
Connors Edward F.
Ruehl Charles A.
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