Price indicating means for a weighing scale
OwnerTai A. Tsaiinventor
Life of this patent
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Abstract
A price indicating apparatus for a spring-loaded weighing scale used for calculating the total price and displaying the price of an article, comprising an inducing component and a transducing component. The inducing component is mounted on the rack of the weighing scale to be shifted according to the movement of the tray; the transducing component is provided for sensing the amount of movement of the inducing component and converting it into digital signals and calculating the price by multiplying the weight and the unit price input from a keyboard.
Claims10
A price indicating means for a weighing scale which has a dial face, a tray supported by a supporting frame, a pair of spring elements, a pivot arm respectively pivoted on said supporting frame, a housing of said weighing scale and a rack to drive said rack according to a movement of said tray, a gear engaged to said rack and connected to a pointer to drive said pointer to indicate a scale on said dial face, comprising:
- (a) an inducing component having an etched pattern of an inducing strip, being mounted on said rack to be shifted according to the movement of said rack;
- (b) a guide plate receiving said inducing component by tabs provided on upper and lower portions of said inducing component lodged in respectively recesses formed on the rear side thereon to prevent said inducing component from deformation;
- (c) a transducing component having another etched pattern thereon opposite to said inducing component for sensing the amount of movement of said inducing component;
- (d) a sloted plate on which said transducing component is mounted and secured by a plurality of rollers, each roller having a notch for said guide plate slidable therebetween;
- (e) a retaining plate on which said sloted plate is mounted fixed on said housing by posts provided therebetween;
- and
- (f) a keyboard to enter an unit price of an article to be weighed and be provided with display means.
A method for operating a price indicating means in a spring-loaded weighing scale is that said price indicating means has an inducing component and a transducing component;
- a change of capacitance created between the inducing component and the transducing component is based on the relative movement therebetween and is converted into a phase shift by a sensor integrated circuit.
Dependencies are inferred from the claim text.