Matches 51 - 100 out of 202 < 1 2 3 4 5 >
Match Document Document Title
4835426 Solenoid-operated valves  
A solenoid-operated valve has its body formed from a plain length of pipe substantially free of any machining or shoulders. The armature and seating are inside, with the armature moving axially,...
4831292 Linear motor arrangement with center of mass balancing  
A motor winding assembly of mass M m is disposed for reciprocating linear movement within a housing, while a motor armature assembly of mass M a is disposed for reciprocating linear movement...
4788968 Electromagnetic vibrator  
Disclosure is made of an electromagnetic vibrator comprising a housing (1) having a cover (6), which accommodates a striker (2) and an excitation coil (3) producing an alternating magnetic field...
4749892 Spring arrangement with additional mass for improvement of the dynamic behavior of electromagnetic systems  
A supplementary mass is arranged in an electromagnet system between armature and reset spring in such a way that, after reaching an end position, the armature is relieved of the spring force; due...
4743178 Non-linear electromagnetic vibration fluid compression device  
A non-linear, electromagnetic, vibration compression mechanism comprising a non-linear electromagnetic vibration device and a piston-cylinder, plunger-cylinder, or membrance type pump. A...
4725208 Positive shut off electromagnetic fluid pump  
A positive shut-off electromagnetic fluid pump of the type having a piston electromagnetically reciprocated in a cylindrical guide by a solenoid coil and a pair of valves for providing a...
4721440 Linear gas compressor  
A linear air compressor having a linear electrodynamic motor which is air cooled and has an increased stroke and accordingly increased output. The working piston is provided with and stroke parting...
4710655 Resonant vibration-transmitting apparatus  
A resonant vibration-transmitting apparatus, including a yoke, a magnetic coil attached on the bottom of the yoke, a vibrant leaf spring attached to the yoke, and an iron core attached to the leaf...
4709176 Magnetic battery  
A magnetic battery is provided that includes a helical spring threaded onto a mnagnetic core to increase relative movement between the magnetic core and coils that may be coated with sulfer and...
4697113 Magnetically balanced and centered electromagnetic machine and cryogenic refrigerator employing same  
A cryogenic refrigerator includes opposing pistons driven by linear electromagnetic machines. Magnetic elements on armatures reciprocate adjacent to first and second flux paths and a transfer of...
4692673 Electromagnetic reciprocating pump and motor means  
An electromagnetic reciprocating motor or pump for use for providing mechanical force for actuation of other fluids or components, and includes a cylinder provided with closures at each end, at...
4675563 Reciprocating linear motor  
A reciprocating linear motor (10) is formed with a pair of ring-shaped permanent magnets (50, 52) having opposite radial polarizations, held axially apart by a non-magnetic yoke (20), which serves...
4661048 Electromagnetic pump with simplified construction  
An electromagnetic pump includes a coil bobbin with an excitation coil, a pair of magnetic cylinders, a printed circuit board with a transistor, and a pump housing. The coil bobbin is disposed...
4659969 Variable reluctance actuator having position sensing and control  
A controlled force variable reluctance actuator. A variable reluctance actuator having a moving element operated by a solenoid is provided in which the current in the solenoid is controlled by a...
4643653 Electromagnetic pump  
An electromagnetic pump has a pump housing. The pump housing consists of a cup-like housing body with an outlet cylindrical portion at the center thereof and a lid member having an inlet...
4638193 Linear impulse motor  
Method of creating a linear bi-directional impulse motor by employing a permanent magnet and U-shaped high permeability cores disposed and energized so that the respective poles of the cores and...
4633201 Rotary waveguide switch having magnetic means for an accurate positioning thereof  
A waveguide switch includes housing walls defining a switch housing; at least two waveguide terminals provided in the housing walls; a rotor supported for rotation in the housing; at least one...
4631430 Linear force motor  
A linear force motor has an elongated body provided with an annular chamber therewithin. An armature is arranged within the chamber for axial movement relative thereto. Two axially-spaced permanent...
4623808 Electromechanical transducer particularly suitable for a linear alternator driven by a free-piston Stirling engine  
An electromechanical transducer particularly useful as a linear alternator driven by a free-piston Stirling engine is disclosed. A relatively high permeability material is formed into a flux loop...
4608000 Air pump  
An air pump for use in combination with a household aquarium, the air pump comprising an electromagnet having an inner iron core, a coil arranged around the inner iron core, and a cylindrical outer...
4605197 Proportional and latching pressure control device  
A proportional pressure control device having a motor with a housing and a reciprocably movable armature oriented in the housing for movement between first and second limit positions. A valve body...
4563602 Permanent magnet type stepping motor  
A permanent magnet type stepping motor is provided. The rotor is made of a cylindrical laminated iron core whose outer periphery is toothed at an equal pitch, and the number of teeth is Nr. The...
4563603 Holder arrangement for the reciprocating rod of electromagnetic reciprocator device  
A holder arrangement for the reciprocating rod of an electromagnetic reciprocator includes a reciprocating rod capable of reciprocating axially by magnetic action or the alternate combination of...
4562385 Periodic reciprocating motor  
A reciprocating electric motor employs plural motor stator modules each including a group of coils selectively energized in subgroups to produce a magnetic field sweeping from one end of the group...
4558293 Solenoid assembly  
A solenoid assembly comprising a magnetic plunger, an electric coil for generating a magnetic flux in a direction along an axis of the magnetic plunger, a main yoke composed of at least two...
4553074 Method of and apparatus for the autosynchronization of an electromagnetic hammer  
An electromagnet hammer of the type described in U.S. Pat. No. 4,215,297 is autosynchronized by triggering the discharge thyristor in response to the detection of the position of the armature by a...
4545117 Method of making a stator bar usable in a linear stepper motor  
A linear stepper motor comprising a stator bar having stator teeth and a slider having slider teeth. The slider is positioned under the stator bar. The surface of the stator bar opposed to the...
4542311 Long linear stroke reciprocating electric machine  
A linear stroke reciprocating electric machine provides both high efficiency and linearity. A cylindrical air gap is defined between outer and inner gap defining surfaces, at least one of which has...
4538964 Multistage resonant compressor  
A multistage resonant reciprocating compressor having opposed cylinders that are driven by a plunger unit. The plunger unit is suspended between a pair of spaced apart flexure springs and is...
4533890 Permanent magnet bistable solenoid actuator  
A bistable actuator comprising a permanent magnet assembly secured to an armature shaft and a pair of core elements axially disposed on either side of the permanent magnet assembly. The cores have...
4529898 Electrodynamic generator for generating seismic pulses  
A generator for generating seismic pulses comprises an armature and a sta coaxially arranged relative one another. The magnet cores of both the stator and the armature have on their active surfaces...
4491262 Electro-magnetic stapling tool  
An electro-magnetic stapling tool having a mechanism for adjusting the power with which the solenoid-operated plunger and the staple driver drive the staples. In its preferred embodiment, the power...
4468594 Electromagnetic percussion implement  
A two-directional percussion implement selectively adaptable both for driving in and for extracting, e.g. piles, from the ground, includes two coaxial electromagnetic coils whose movable armatures...
4455497 Linear motion devices  
Apparatus for producing linear motion comprising a coil defining an electromagnetic field across a gap; and a permanent magnet disposed within the magnetic field in the gap and arranged to be...
4396874 Magnetic apparatus for producing movement  
Apparatus for providing movement includes an electromagnet. The time required to attain a given value of current flow in a magnet coil is shortened by initially providing a higher voltage to attain...
4395649 Linear electromagnetic vibrator  
An electrically driven linear vibrator has swing drive for vibrating troughs, jarring tables or the like comprises a stator with an exciter winding, an armature guided for linear movement in a...
4389169 Pump for fluids  
A reciprocating electromagnetic pump, particularly but not exclusively for non viscous fluids, adapted to considerably reduce hum and heat loss, at the same time decreasing the electrical input,...
4368446 Solenoid  
An AC or DC solenoid for operating a hydraulic or air valve, or another machine comprises a means provided at one end of an armature for reducing the effective cross-sectional area of a magnetic...
4366401 Electromagnetic devices  
An electromagnetic device includes a stator having axially spaced pole pieces and windings which when energized cause adjacent pole pieces to have opposite magnetic polarity. An armature surrounds...
4363980 Linear motor  
A linear motor which utilizes the magnetic attraction between a washer formed from a ferrous material, e.g., steel, and a magnetic pole of an armature for automatically returning the armature to...
4352645 Solenoid pump adapted for noiseless operation  
A solenoid-actuated hydraulic fluid pump having a reciprocable armature operable by a magnetic circuit and with dashpot structure to limit movement of the armature beyond a predetermined position...
4349757 Linear oscillating electric machine with permanent magnet excitation  
A linear electrodynamic machine is disclosed having permanent magnet excitation and an end flux leakage control. A flux carrying body having a plurality of annular magnets of alternating radially...
4334748 Photographic camera light controlling apparatus  
Photographic camera light controlling apparatus for driving a light admitting system, comprising four stator electromagnetic poles defining therebetween an intervening field space containing a...
4326139 Electromagnetic devices  
An electromagnetic device comprises a stator structure and an armature surrounding the stator structure. The stator structure is provided with axially spaced pole pieces which are of annular form...
4308475 Solenoid pump adapted for noiseless operation  
A solenoid-actuated fluid pump having reciprocable armature operable by a magnetic circuit and with structure in the flux path at the upper and lower air gaps to substantially change the reluctance...
4301887 Acceleration-responsive apparatus for sensing firing instant of an air gun  
A variable reluctance type firing sensor is mounted on an air gun for providing an electrical signal indicative of the instant of firing of the air gun. The firing sensor has a magnetic circuit...
4295066 Electromagnetic actuator  
An electromagnetic actuator comprising a housing of magnetizable material defining a stationary pole, a bobbin supported by the housing and having an interior bore, an armature comprising a...
4259653 Electromagnetic reciprocating linear actuator with permanent magnet armature  
A spring-less linear actuator, especially useful as a print wire drive. A permanent magnet armature is driven from a rest position on a pole piece by magnetic repulsion upon energization of a...
4238699 Electro-magnetic devices  
An electro-magnetic actuator includes a pair of magnetizable members, the one member being hollow and surrounding the other member. The other member defines a plurality of axially spaced...
4237395 Electric dynamotor  
The present invention relates to a dynamo-electric machine which includes a plurality of permanent magnets arranged sequentially with like poles adjacent and spaced from each other by a plurality...
Matches 51 - 100 out of 202 < 1 2 3 4 5 >