GB1113992A - Improvements relating to weighing instruments - Google Patents

Improvements relating to weighing instruments

Info

Publication number
GB1113992A
GB1113992A GB1337364A GB1337364A GB1113992A GB 1113992 A GB1113992 A GB 1113992A GB 1337364 A GB1337364 A GB 1337364A GB 1337364 A GB1337364 A GB 1337364A GB 1113992 A GB1113992 A GB 1113992A
Authority
GB
United Kingdom
Prior art keywords
coil
resistor
voltage
acceleration
force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1337364A
Inventor
Christopher James Woodvi Mason
Eric Jeffrey Wightman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Group Services Ltd
Original Assignee
Sperry Rand Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sperry Rand Ltd filed Critical Sperry Rand Ltd
Priority to GB1337364A priority Critical patent/GB1113992A/en
Publication of GB1113992A publication Critical patent/GB1113992A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
    • G01N9/20—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by balancing the weight of the bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
    • G01G7/02—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action
    • G01G7/04—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action with means for regulating the current to solenoids

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

1, 113, 992. Measuring weight electrically. SPERRY RAND Ltd. April 1, 1965 [April 1, 1964] No. 13373/64. Heading G1N. A weighing instrument including means for compensating for the effect of acceleration comprises a first force coil 2 mounted in a magnetic field, a variable resistor 5 which controls the current in the coil so that the force produced by the coil counterbalances, at least in part, the weight to be measured, an accelerometer 6 having a second force coil 7 tending to maintain the movable element of the accelerometer in a datum position, a feedback loop 8, 9 which applies a voltage representing the sensed acceleration to the coil 7, and a circuit which applies across the variable resistor 5 a voltage which is a function of the acceleration-representing voltage. The instrument may be a continuous flow densitometer in which the liquid passes through a horizontal U-tube pivotally mounted on flexible connections and supported by the force coil 2. Movements of the object to be weighed are detected by an inductive or photo-electric pick-off 3 which delivers a signal to a servo system 4 controlling the variable resistor 5, and the voltages appearing across the resistor 5 and a fixed resistor 10 in series with the coil 7 are added by resistors 11, 12 and supplied to an amplifier 13 which provides the current to the coil 2. The circuit maintains the voltage across the resistor 5 substantially equal to the reference voltage across the resistor 10, so that the setting of the resistor 5 is proportional to the weight to be measured and is independent of the acceleration of the instrument.
GB1337364A 1964-04-01 1964-04-01 Improvements relating to weighing instruments Expired GB1113992A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1337364A GB1113992A (en) 1964-04-01 1964-04-01 Improvements relating to weighing instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1337364A GB1113992A (en) 1964-04-01 1964-04-01 Improvements relating to weighing instruments

Publications (1)

Publication Number Publication Date
GB1113992A true GB1113992A (en) 1968-05-15

Family

ID=10021790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1337364A Expired GB1113992A (en) 1964-04-01 1964-04-01 Improvements relating to weighing instruments

Country Status (1)

Country Link
GB (1) GB1113992A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834474A (en) * 1970-10-16 1974-09-10 W Knol Method and apparatus for determining the quantity of a bulk material deposited on a conveyor
EP0103747A2 (en) * 1982-08-20 1984-03-28 Mettler Instrumente GmbH Load cell
EP0122796B1 (en) * 1983-04-14 1989-08-02 Kabushiki Kaisha Ishida Koki Seisakusho Weighing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834474A (en) * 1970-10-16 1974-09-10 W Knol Method and apparatus for determining the quantity of a bulk material deposited on a conveyor
EP0103747A2 (en) * 1982-08-20 1984-03-28 Mettler Instrumente GmbH Load cell
EP0103747A3 (en) * 1982-08-20 1985-10-02 Mettler-Waagen Gmbh Load cell
EP0122796B1 (en) * 1983-04-14 1989-08-02 Kabushiki Kaisha Ishida Koki Seisakusho Weighing apparatus

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