Digital weighing machine

A digital weighing machine comprising a base, a metering spring fixed at one end thereof to said base, a load supporting link mounted between said base and the other end of said metering spring and movable to displace the metering spring according to the weight of a body to be measured when applied to the load supporting link, a fixed electrode plate consisting of an electrically conductive flat plate secured to said base, a movable electrode plate consisting of an electrically conductive flat plate disposed opposite to said fixed electrode plate to provide an electrostatic capacitance therebetween and interlocked with said load supporting link so as to move away from or towards said fixed electrode plate with said movement of said load supporting link, an oscillator circuit including said electrostatic capacitance as a frequency determining parameter for generating an electric output having a frequency which varies with the change in said capacitance according to the weight of said body, a counter circuit for directly counting the frequency of the electric output from said oscillator circuit to provide a count representative of the weight of said body, a digital display for displaying the count from said counter, and an electric power circuit for said oscillator circuit, counter circuit and display, wherein said movable electrode plate is supported in a movable point contact relation with said load supporting link by a link pin and a spring is provided between said movable electrode plate and said load supporting link for keeping the point contact pressure constant at any time.