Capacitive weighing device
First Claim
1. Capacitive weighing device, comprised of a frame or substructure, four arms arranged in cross shape or substantially in cross shape and hingedly supported on knife-edges in said frame, a weighing plate vertically movable relative to said frame, bearing through knife-edges on said arms, in notches provided therefor in the arms, in which said arms bear with the mutually-facing ends thereof on a spring plate, wherewith an armature or upmost capacitive plate is insulatedly connected, said spring plate bearing with the one end thereof on one upstanding side from a box-like holder with a bottom whereon a metal film which acts as a lowermost capacitive plate is insulatedly fixed, and bearing with the opposite end thereof on an upstanding knife-edge, said knife-edge being supported in two slots provided in the bottom, in such a way that during a weighing operation, said knife-edge may slightly swing and always form substantially the same angle with the spring plate bearing on said knife-edge.
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Accused Products
Abstract
There is described a device, comprised of a frame or substructure, four arms arranged in cross shape or substantially in cross shape and hingedly supported on knife-edge in said frame, a weighing plate vertically movable relative to said frame, bearing through knife-edges on said arms, in notches provided therefor in the arms, in which said arms bear with the mutually-facing ends thereof on a box-design sensor, whereby the sensor capacity is changed proportionally to that force being exerted on said weighing plate, and in which said sensor is formed by a box-like holder with a bottom whereon a first insulated armature which acts as lowermost capacitive plate, is firmly secured.
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Citations
7 Claims
- 1. Capacitive weighing device, comprised of a frame or substructure, four arms arranged in cross shape or substantially in cross shape and hingedly supported on knife-edges in said frame, a weighing plate vertically movable relative to said frame, bearing through knife-edges on said arms, in notches provided therefor in the arms, in which said arms bear with the mutually-facing ends thereof on a spring plate, wherewith an armature or upmost capacitive plate is insulatedly connected, said spring plate bearing with the one end thereof on one upstanding side from a box-like holder with a bottom whereon a metal film which acts as a lowermost capacitive plate is insulatedly fixed, and bearing with the opposite end thereof on an upstanding knife-edge, said knife-edge being supported in two slots provided in the bottom, in such a way that during a weighing operation, said knife-edge may slightly swing and always form substantially the same angle with the spring plate bearing on said knife-edge.
Specification