Force transducer for strain gage
First Claim
1. A resistance type strain gage which comprises a pair of spaced apart load attaching elements, a plurality of conductive resistance elements mechanically connecting said load attaching elements, said resistance elements being insulated from said load attaching elements and from each other and being conductively connected at their alternate ends in series, the resistance elements being arranged in the form of wire rope, the individual wires of said rope being connected in series by conductive connections at alternate ends of the wires and said load attaching elements being in the form of wire rope terminal fittings, and means for connecting the ends of said serially connected resistance elements to an electric circuit.
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Accused Products
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.
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Citations
6 Claims
- 1. A resistance type strain gage which comprises a pair of spaced apart load attaching elements, a plurality of conductive resistance elements mechanically connecting said load attaching elements, said resistance elements being insulated from said load attaching elements and from each other and being conductively connected at their alternate ends in series, the resistance elements being arranged in the form of wire rope, the individual wires of said rope being connected in series by conductive connections at alternate ends of the wires and said load attaching elements being in the form of wire rope terminal fittings, and means for connecting the ends of said serially connected resistance elements to an electric circuit.
- 3. A resistance element type force transducer comprising a pair of spaced apart load attaching elements, a plurality of conductive resistance elements mechanically connecting said load attaching elements, said resistance elements being insulated from said load attaching elements and from each other and being conductively connected at their alternate ends in series, said resistance elements being in the form of wires grouped in intimate contact in a self supporting arrangement devoid of any spacing elements with said individual wires being connected in series by conductive connections and means for connecting said serially connected resistance elements to an electric circuit.
Specification