Digital scale or weighing apparatus
First Claim
1. An electronic digital weighing apparatus having a weighing platform to accommodate an object to be weighed, comprising:
- a. transducer means coupled to said platform and responsive to the weight of said object to provide an analog signal indicative of said weight,b. a voltage to frequency converter coupled to said transducer means and operative to provide an output frequency linearly related to said analog signal,c. logic means coupled to said converter for providing a timing signal having a duration selected in accordance with said output frequency to enable a number of pulses indicative of the weight of said object to be transmitted during said duration of said timing signal, wherein the number of pulses transmitted is a direct indication of the weight of said object,d. utilization means coupled to said logic means and responsive to said number of said pulses as transmitted to display a number manifesting said weight.
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Accused Products
Abstract
There is disclosed an electronic scale which may, for example, be used as a bathroom scale, medical room scale, or otherwise. The scale provides a digital display of the weight of an object placed or positioned on a weighing platform and can provide said display in terms of the conventional system or the metric system by varying the time base or gate as applied to a counter. The counter has another input which provides a frequency related to the object'"'"'s weight; which frequency is counted in accordance with the duration of the time gate, to enable a digital display of the weight.
Apparatus is shown for providing a time base for the scale and employs two voltage to frequency converters, one to provide a frequency related to the weight of an object and the other to provide a time base; both of which vary according to supply fluctuations. The circuitry provides a number of pulses to the counter indicative of the true weight and independent of the supply voltage.
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Citations
10 Claims
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1. An electronic digital weighing apparatus having a weighing platform to accommodate an object to be weighed, comprising:
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a. transducer means coupled to said platform and responsive to the weight of said object to provide an analog signal indicative of said weight, b. a voltage to frequency converter coupled to said transducer means and operative to provide an output frequency linearly related to said analog signal, c. logic means coupled to said converter for providing a timing signal having a duration selected in accordance with said output frequency to enable a number of pulses indicative of the weight of said object to be transmitted during said duration of said timing signal, wherein the number of pulses transmitted is a direct indication of the weight of said object, d. utilization means coupled to said logic means and responsive to said number of said pulses as transmitted to display a number manifesting said weight. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic scale apparatus for providing a digital display of weight of an object, comprising:
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a. means responsive to said object to provide an analog signal indicative of the weight of said object, b. conversion means responsive to said analog signal to provide at an output thereof, a frequency proportional to the weight of said object, c. selectable gating means operative to provide a predetermined duration signal coupled to said conversion means and operable to transmit a number of cycles of said frequency during said duration signal, which number of cycles is indicative of the weight of said object, and d. logic means coupled to said gating means and responsive to said number of cycles to store the same in a predetermined sequence manifesting a selected system of weights according to the selection of said gating means, e. means coupled to said logic means for displaying said weight as stored in a predetermined number of digits. - View Dependent Claims (9, 10)
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Specification