GB1453823A - Electromagnetic force applying device - Google Patents
Electromagnetic force applying deviceInfo
- Publication number
- GB1453823A GB1453823A GB4707372A GB4707372A GB1453823A GB 1453823 A GB1453823 A GB 1453823A GB 4707372 A GB4707372 A GB 4707372A GB 4707372 A GB4707372 A GB 4707372A GB 1453823 A GB1453823 A GB 1453823A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- armature
- core
- thermal expansion
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
- G01L11/008—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces electrostatic or electromagnetic counterbalancing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
- G01L9/0038—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using variations in capacitance
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
1453823 Measuring pressure electrically LUCAS INDUSTRIES Ltd 8 Oct 1973 [12 Oct 1972] 47073/72 Heading G1N [Also in Division H1] An electromagnet comprises, Fig. 1 (not shown) an annular gapped core with a winding producing a radial field in the gap to draw an annular armature thereinto with a force varying with ambient temperature; the armature and core being of materials e.g. soft iron and nickel iron having differing coefficient of thermal expansion, to apply differing forces at differing temperatures; and the device being applicable to a force balance fluid-pressure transducer wherein a fluid bellows subject to thermal expansion acts on a lever against an electromagnetic force applied thereto. The energization is controlled in response to deflections of the lever to achieve balance. A pair of such electromagnets 20, 21 Fig. 2 have armatures 20a, 21a bearing on lever 22 in opposite directions and have double windings; one of each being constantly polarized and the others being series oppositely connected to apply unbalanced deflections to the lever to counterbalance the force applied by flexible resilient evacuated bellows 23 subject to external pressure to be measured. Thermal expansion increases the force on the lever with temperature for a given pressure, and accurate choice of gap and armature proportions and core and armature materials produce linear response; the lever position being capacitively sensed at 24 to control the excitation current of the magnets over circuit 25. The direction of compensation is reversible by making the armature of nickel iron and the core of soft iron.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4707372A GB1453823A (en) | 1972-10-12 | 1972-10-12 | Electromagnetic force applying device |
FR7336329A FR2203146B1 (en) | 1972-10-12 | 1973-10-11 | |
DE19732351095 DE2351095A1 (en) | 1972-10-12 | 1973-10-11 | ELECTROMAGNETIC DEVICE FOR GENERATING A FORCE |
IT5305873A IT994395B (en) | 1972-10-12 | 1973-10-11 | ELECTROMAGNETIC DEVICE FOR APPLICATION OF FORCES AND TRANSDUCER INCLUDING IT |
JP11405673A JPS4995669A (en) | 1972-10-12 | 1973-10-12 | |
US05/527,309 US3955164A (en) | 1972-10-12 | 1974-11-26 | Electromagnetic force applying device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4707372A GB1453823A (en) | 1972-10-12 | 1972-10-12 | Electromagnetic force applying device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1453823A true GB1453823A (en) | 1976-10-27 |
Family
ID=10443621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4707372A Expired GB1453823A (en) | 1972-10-12 | 1972-10-12 | Electromagnetic force applying device |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS4995669A (en) |
DE (1) | DE2351095A1 (en) |
FR (1) | FR2203146B1 (en) |
GB (1) | GB1453823A (en) |
IT (1) | IT994395B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8514544D0 (en) * | 1985-06-08 | 1985-07-10 | Lucas Ind Plc | Electromagnetic actuator |
-
1972
- 1972-10-12 GB GB4707372A patent/GB1453823A/en not_active Expired
-
1973
- 1973-10-11 FR FR7336329A patent/FR2203146B1/fr not_active Expired
- 1973-10-11 DE DE19732351095 patent/DE2351095A1/en active Pending
- 1973-10-11 IT IT5305873A patent/IT994395B/en active
- 1973-10-12 JP JP11405673A patent/JPS4995669A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2203146A1 (en) | 1974-05-10 |
IT994395B (en) | 1975-10-20 |
DE2351095A1 (en) | 1974-04-18 |
FR2203146B1 (en) | 1976-10-01 |
JPS4995669A (en) | 1974-09-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |