GB488921A - Electric micro-balance for weighing and other purposes - Google Patents
Electric micro-balance for weighing and other purposesInfo
- Publication number
- GB488921A GB488921A GB2779536D GB2779536D GB488921A GB 488921 A GB488921 A GB 488921A GB 2779536 D GB2779536 D GB 2779536D GB 2779536 D GB2779536 D GB 2779536D GB 488921 A GB488921 A GB 488921A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mass
- coil
- coils
- armature
- polepieces
- 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
Links
Landscapes
- Reciprocating Pumps (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
488,921. Electric signalling systems ; weighing - apparatus. MUNRO, R., and MORTON, J. M. L. Oct. 15, 1936, Nos. 27995 /36 and 7478 /37. [Class 40 (i)] [Also in Group XVIII] An electric micro-balance for precise measuring operations, comprises a magnet in the field of which is located a pair of coils carried by a vibratory armature system, one of the coils serving to vibrate the armature system when supplied with current of pre-selected frequency, and the other coil serving as an output coil of which the potential is a function of the mass of the armature svstem. As shown for ascertaining the weight of a mass placed in a pan 15 the magnet assembly comprises two pot magnets 7, 8 with polepieces 7a, 8a. A link 11 passes through the polepieces and is secured to diaphragms 9, 10 suspended adjacent the ends of the magnets by means of corrugated arms 16. Coils 2, 3 are connected to the diaphragms, the coil 2 being energized from A.C. mains, a valve oscillator or other preferably low frequency oscillator 4. The coil 3 is connected to the input of a valve or other amplifier 5 connected to a voltmeter 6 graduated to read directly in grammes or other units of mass. When a mass is placed on the pan 15 the vibratory movements of the armature system caused by the energization of the coil 2, are proportionately clamped and the weight of the mass is indicated on the voltmeter 6. In a modification, the ink 11 is dispensed with and the diaphragm and magnet assembly is made airtight so that the column of entrapped air vibrates the diaphragm 10.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB488921A true GB488921A (en) | 1938-07-15 |
Family
ID=1740770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2779536D Expired GB488921A (en) | 1936-10-15 | Electric micro-balance for weighing and other purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB488921A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2623636A (en) * | 1950-03-14 | 1952-12-30 | Richard T Pounds | Apparatus for dynamically determining weight and for assorting articles |
| US3366191A (en) * | 1966-07-28 | 1968-01-30 | Pillsbury Co | Method and apparatus for weighing articles |
| US3519093A (en) * | 1967-12-05 | 1970-07-07 | Campbell Soup Co | Apparatus and method for sensing mass,and high-speed weighing apparatus and method utilizing same |
| US3595329A (en) * | 1968-09-30 | 1971-07-27 | Ronald Withnell | Weighing apparatus with oscillation-comparison electrical transducer |
| US4050530A (en) * | 1976-05-14 | 1977-09-27 | Pitney-Bowes, Inc. | Method and apparatus for determining weight and mass |
| US4916391A (en) * | 1984-11-15 | 1990-04-10 | Doerman Eryk S | LVDT displacement sensor with signal noise reduction for use in weighing apparatus |
-
1936
- 1936-10-15 GB GB2779536D patent/GB488921A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2623636A (en) * | 1950-03-14 | 1952-12-30 | Richard T Pounds | Apparatus for dynamically determining weight and for assorting articles |
| US3366191A (en) * | 1966-07-28 | 1968-01-30 | Pillsbury Co | Method and apparatus for weighing articles |
| US3519093A (en) * | 1967-12-05 | 1970-07-07 | Campbell Soup Co | Apparatus and method for sensing mass,and high-speed weighing apparatus and method utilizing same |
| US3595329A (en) * | 1968-09-30 | 1971-07-27 | Ronald Withnell | Weighing apparatus with oscillation-comparison electrical transducer |
| US4050530A (en) * | 1976-05-14 | 1977-09-27 | Pitney-Bowes, Inc. | Method and apparatus for determining weight and mass |
| US4916391A (en) * | 1984-11-15 | 1990-04-10 | Doerman Eryk S | LVDT displacement sensor with signal noise reduction for use in weighing apparatus |
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