Patent EP0044707A2 successfully refreshed from Google Patents.
EP0044707A2
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An electronic balance
Assignee: Shimadzu Corp
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Filing: 1981-07-15
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Granted: —
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Expires: 2001-07-15
Abstract
Abstract A weighing unit 3 has a scale pan to which is applied the load W to be measured. The load is balanced by an electromagnetic force and the magnitude of the current required is output to discriminator 41 as a measure of the load. In the absence of the load 41 gives stand-by output 8 to AND circuit 42 fed with periodic pulses a. Output β is produced and fed to an electromagnet in weighing unit 3 to lift a reference weight from the scale and replace it after a time determined by timer 44. On replacement of the reference weight an output y from 42 actuates switches 45 and 48 for entry of measured value in register 46 via circuit D. With a load W on the scale from the output of 41 goes via circuit A to arithmetic unit 47 which corrects the measured value in proportion to the error in the measured value of the reference weight before the corrected value is displayed at 5.
Inventors
- 👤 Shozo Yano
- 👤 Yasuhiro Hujinaga
- 👤 Akira Komoto
- 👤 Toshio Kawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:25
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/01; G01G23/012; G01G7/00; G01G7/02; G01G7/04; G01G7/045; Y; Y10; Y10S; Y10S177/00; Y10S177/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
155 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; a first memory for storing the mass of a reference weight, said mass'being known; a discriminator for signalizing the existence and non-existence of said object on said tray; a second memory for storing a corrected value obtained by differentiating between a measured value of said reference weight and said mass stored in said first memory when said discriminator signalized that no object is placed on said tray; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory when said discriminator signalizes that an object is placed on said tray; and a display for permitting of visual inspection of said arithmetic results obtained by said arithmetic " nit.
Claim 2
Dependent Claim
155 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; a first memory for storing the mass of a reference weight, said mass'being known; a discriminator for signalizing the existence and non-existence of said object on said tray; a second memory for storing a corrected value obtained by differentiating between a measured value of said reference weight and said mass stored in said first memory when said discriminator signalized that no object is placed on said tray; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory when said discriminator signalizes that an object is placed on said tray; and a display for permitting of visual inspection of said arithmetic results obtained by said arithmetic " nit.
Claim 3
Dependent Claim
165 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; an input unit for inputting the masses of reference weights; a writing means for transcribing data from said input unit onto a first memory as reference values; a discriminator for signalizing the existence and non-existence of said object on said tray; a second memory for storing a corrected value obtained by differentiating between each of measured values of said reference'weights and the masses thereof stored in said first memory when said discriminator signalizes that no object is placed on said tray; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory when said discriminator signalizes that an object is placed on said tray; and an output unit for outputting said arithmetic results obtained by said arithmetic unit.
Claim 4
Dependent Claim
165 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; an input unit for inputting the masses of reference weights; a writing means for transcribing data from said input unit onto a first memory as reference values; a discriminator for signalizing the existence and non-existence of said object on said tray; a second memory for storing a corrected value obtained by differentiating between each of measured values of said reference'weights and the masses thereof stored in said first memory when said discriminator signalizes that no object is placed on said tray; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory when said discriminator signalizes that an object is placed on said tray; and an output unit for outputting said arithmetic results obtained by said arithmetic unit.
Claim 5
Dependent Claim
147 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force included upon a tray when an object to be weighed is placed thereon; a plurality of loaded reference weights whose masses are known, said reference weights being carried by a support integral with said tray such that a positive or negative addition of their masses can be made; a memory for storing data with respect to the masses of said reference weights, said data being stored correspondingly to each of said reference weights; an input unit for transcribing said data onto said memory; an arithmetic unit for obtaining a measured value on the basis of a positive or negative addition of said reference weights and said data stored in said memory; and ' an output unit for outputting said arithmetic results obtained by said arithmetic unit.
Claim 6
Dependent Claim
147 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force included upon a tray when an object to be weighed is placed thereon; a plurality of loaded reference weights whose masses are known, said reference weights being carried by a support integral with said tray such that a positive or negative addition of their masses can be made; a memory for storing data with respect to the masses of said reference weights, said data being stored correspondingly to each of said reference weights; an input unit for transcribing said data onto said memory; an arithmetic unit for obtaining a measured value on the basis of a positive or negative addition of said reference weights and said data stored in said memory; and ' an output unit for outputting said arithmetic results obtained by said arithmetic unit.
Claim 7
Dependent Claim
204 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; a single loaded reference weight whose mass is known, said reference weight being carried by a support integral with said tray such that a positive or negative addition of said mass can be made; a first memory for storing said mass of said reference weight as a reference value; a discriminator for signalizing the existence and non-existence of said object on said tray; a signal generator for intermittently instructing a positive or negative addition of said single reference weight; a second memory for storing a corrected value obtained by differentiating between a measured value of said reference weight and said mass stored in said first memory when said discriminator signalizes that on object is placed on said tray and when said signal generator signalizes a positive or negative addition of said reference weight; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory; and an output unit for outputting arithmetic results obtained by said arithmetic unit.
Claim 8
Dependent Claim
204 words
An electronic balance comprising: a weighing means for producing digital output signals as a measured value in response to a force induced upon a tray when an object to be weighed is placed thereon; a single loaded reference weight whose mass is known, said reference weight being carried by a support integral with said tray such that a positive or negative addition of said mass can be made; a first memory for storing said mass of said reference weight as a reference value; a discriminator for signalizing the existence and non-existence of said object on said tray; a signal generator for intermittently instructing a positive or negative addition of said single reference weight; a second memory for storing a corrected value obtained by differentiating between a measured value of said reference weight and said mass stored in said first memory when said discriminator signalizes that on object is placed on said tray and when said signal generator signalizes a positive or negative addition of said reference weight; an arithmetic unit for correcting a measured value signalized by said weighing means in accordance with said corrected value stored in said second memory; and an output unit for outputting arithmetic results obtained by said arithmetic unit.
Claim 9
Dependent Claim
37 words
An electronic balance as defined in Claim 3, further comprising a counter for counting the frequency of measurements, whereby when the counts reach a desired value, a positive or negative addition of said reference weight is signalized.
Claim 10
Dependent Claim
32 words
An electronic balance as defined in Claim 3, wherein a positive or negative addition of said reference weight is signalized at an interval selected from the range of 1 to 180 minutes.
Claim 11
Dependent Claim
25 words
An electronic balance as defined in Claim 3, further comprising a press button whereby a positive or negative addition of said reference weight is signalized.
Claim 12
Dependent Claim
33 words
An electronic balance as defined in Claim 6, wherein a positive or negative addition of said reference weight is signalized when a press button for negating the weight of a package is operated.
References Cited (Backward Citations)
No citation records indexed.
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