Dual display weight measuring apparatus
AssigneeMeasurement Ltd.
InventorSteven Petrucelli
Life of this patent
Estimating the term…
Abstract
A mechanical weighing scale having mechanical parts driving a pointer rotating around a fixed disc or dial having slots or holes formed therein. The mechanical pointer operates to provide an analog display of one's weight to the user. An optical sensor system is responsive to the mechanical motion of the mechanically-rotating pointer as it passes over each of the holes or slots for determining a number of counts associated with the mechanical motion of the rotating pointer and translating the counts to a corresponding weight value for display onto a digital display.
Claims25
A mechanical weighing scale comprising:
- a platform for supporting an object to be weighed;
- an analog display for indicating a weight of the object;
- a digital display for indicating the weight of the object;
- a movable member associated with a plurality of openings;
- a mechanical weight sensing arrangement including at least one lever mechanically responsive to the platform, a calibration plate mechanically responsive to the at least one lever, and a rack and pinion arrangement mechanically responsive to the calibration plate, the mechanical weight sensing arrangement for sensing the weight of the object supported on the platform, mechanically causing the analog display to indicate the sensed weight of the object, and moving the movable member in proportion to the sensed weight of the object;
- a sensor arrangement for sensing the openings as the movable member moves in proportion to the sensed weight and generating a pulse for each of the openings sensed;
- and a processor for counting the pulses, converting the counted pulses into a corresponding value of the weight sensed, and causing the digital display to display the value of the weight sensed;
- wherein the movable member is selected from the group consisting of a pointer, a gear driven rack, a rotatable drum-shaped dial and a segment of a rotatable drum-shaped dial.
A mechanical weighing scale comprising:
- a platform for supporting an object to be weighed;
- an analog display for indicating a weight of the object;
- a digital display for indicating the weight of the object;
- a mechanical weight sensing arrangement including at least one lever mechanically responsive to the platform, a calibration plate mechanically responsive to the at least one lever, and a rack and pinion arrangement mechanically responsive to the calibration plate, the mechanical weight sensing arrangement for sensing the weight of the object supported on the platform and mechanically causing the analog display to indicate the sensed weight of the object, the rack and pinion arrangement including a rack member having a plurality of openings;
- a sensor arrangement for sensing the openings as the rack member moves in proportion to the sensed weight and generating a pulse for each of the openings sensed;
- and
- a processor for counting the pulses, converting the counted pulses into a corresponding value of the weight sensed, and causing the digital display to display the value of the weight sensed.
Dependencies are inferred from the claim text.