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公开(公告)号：US3585547A
公开(公告)日：1971-06-15
申请号：US3585547D
申请日：1969-07-15
申请人： BELL AEROSPACE CORP
CPC分类号： H01F7/14
摘要： An improvement in electromagnetic force motors in which linearity of the force versus input signal characteristic is extended. Discrete sections of magnetically saturable material are inserted in the flux path between the frames and permanent magnets and have induction/magnetic force characteristics different from the characteristic of the frame material to obtain magnetic saturation paths thereat.
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公开(公告)号：US3570807A
公开(公告)日：1971-03-16
申请号：US3570807D
申请日：1969-01-14
申请人： BELL AEROSPACE CORP
CPC分类号： F16K31/0682
摘要： An electromechanical control valve in which a poppet is magnetically biased against a valve seat and is mechanically unseated upon decrease of the magnetic moment. A suspension plate carries the poppet on one side thereof and an armature on the other side to constitute an integrated assembly. A permanent magnet attracts the armature to thereby bias the poppet against the seat and deform the suspension plate. A coil is disposed on the armature and, when energized, develops a magnetic potential in opposition to the magnetic potential of the permanent magnet to thereby decrease the permanent magnet attraction whereby the deformed suspension plate, acting as a spring, urges the poppet out of the seat. The coil can be disposed so as to positively attract the armature through the null point to an opposite poll. The suspension plate also serves to isolate the magnetic circuit from the poppet-seat area.
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公开(公告)号：US3570806A
公开(公告)日：1971-03-16
申请号：US3570806D
申请日：1969-01-14
申请人： BELL AEROSPACE CORP
IPC分类号： F16K31/08
CPC分类号： F16K31/082
摘要： An electromechanical control valve in which a poppet is biased against a seat therefor within an enclosing chamber having inlet and outlet ports and which is balanced against fluid pressure forces. Oppositely disposed walls of the chamber are deformable and a force-transmitting rod carries the poppet between such deformable walls whereby displacement of the poppet causes deformation of the walls to urge the poppet in the opposite direction. A system geometry is utilized which takes into account the effective surfaces of the poppet and the configurations of the walls when deformed. In particular embodiments, bias on the poppet is obtained by the application of the magnetic potential of a permanent magnet operatively associated with an armature extension of the poppet outside the chamber. The permanent magnet biases the poppet to its seat and a coil is disposed on the armature to oppose the permanent magnet potential whereby the deformed chamber walls, acting as springs, urge the poppet to an open position.
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公开(公告)号：US3570833A
公开(公告)日：1971-03-16
申请号：US3570833D
申请日：1969-01-15
申请人： BELL AEROSPACE CORP
CPC分类号： F15C3/00
摘要： A STEP CONTROL UTILIZING A CONICAL WASHER-SHAPED MEMBER, HAVING A NEGATIVE SPRING RATE, THAT IS ABRUPTLY SNAPPED TO A MORE FLATTENED CONFIGURATION WHEN SUBJECTED TO A FORCE IN EXCESS OF A PREDETERMINED MAGNITUDE. THE CONTROL INCLUDES MEANS FOR TRANSMITTING FORCE TO THE CONICAL MEMBER AND A HOUSING CONNECTING THE CONICAL MEMBER AND TRANSMITTING MEANS AND DEFINING A REACTION SURFACE THEREFOR. THE FORCE TRANSMISSION MEANS EXTENDS THROUGH AN APERTURE IN THE HOUSING FOR REACTION WITH A FORCE-SUPPLYING SURFACE. IN OTHER EMBODIMENTS, A PLURALITY OF SCU STEP CONTROLS ARE DISPOSED IN THE PATH OF MOVEMENT OF A SURFACE TO BE CONTROLLED FOR SUCCESSIVE ABUTMENT WITH SUCH SURFACE EACH STEP CONTROL EFFECTING ABRUPT RELEASE OF SUCH CONTROL SURFACE, UPON APPLICATION OF FORCE THERETO IN EXCESS PREDETERMINED MAGNITUDE. IN STILL OTHER EMBODIMENTS, ONE OR MORE OF SUCH STEP CONTROLS ARE DISPOSED IN THE PATH OF MOVEMENT OF A VALVE CONTROL TO PROVIDE STEP-WISE CHANGE IN THE FLUID FLOW RATE OF THE VALVE.
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公开(公告)号：US3532121A
公开(公告)日：1970-10-06
申请号：US3532121D
申请日：1969-01-15
申请人： BELL AEROSPACE CORP
IPC分类号： F16K31/08
CPC分类号： F16K31/082 , Y10T137/86815
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