Showing papers on "Solenoid published in 1979"

Improved tandem mirror fusion reactor

Abstract: It is shown that the introduction of barrier potentials between the plugs and solenoid of a tandem mirror substantially reduce ion energy and density required in end plugs. Several means for creating barriers and some of the important physics issues are discussed.

Constant amplitude controller and method

Abstract: There is disclosed a constant amplitude controller with feedback control for a vibratory feeder apparatus wherein a controlled rectifier is used to rectify the A.C. line voltage applied to the feeder solenoid and to control the voltage to the feeder solenoid. Triggering of the controlled rectifier is accomplished by a bias control signal which is composed of an A.C. phase shift voltage superpositioned by a variable D.C. bias voltage. Mechanical coupling is provided between the solenoid and a transducer which provides feedback to control logic circuitry. In the control logic circuitry, the signal received from the transducer is compared with a signal received from an operator adjusted potentiometer. In this manner, the desired amplitude of the vibrator apparatus is compared with the actual amplitude of the vibrator apparatus and, if there is a discrepancy, the control logic circuitry modifies the amount of control voltage being transferred by the controlled rectifier.

Control arrangement for electro-mechanical tool

Abstract: A control arrangement for an electro-mechanical tool is disclosed. The tool may, for example, be a nailer or stapler, and is provided with an impact member which is frictionally moved in a working stroke by means of an electrically driven flywheel, which presses the impact member against the support element, which may be a counter-rotating flywheel. A solenoid is provided to move the impact member into the bite between the flywheel and support element. A trigger actuated switch and a safety switch actuated by contact of the tool with the workpiece must both be actuated in order to energize the solenoid. Circuitry is disclosed which makes possible the energization of the solenoid by closing both switches in any order, or in a desired particular order, and makes possible the provision of a time delay safety.

Roadside spray apparatus

Abstract: A roadside spray apparatus primarily adapted for the precision application of chemical herbicides is mounted by means of a frame support on the front bumper of a vehicle and is monitored by the driver of the vehicle using one hand to operate electrical switches connected to solenoid valves controlling the spray through nozzles mounted on a spray boom, which boom can be adjusted laterally and can be pivoted from one side of the vehicle to the other, with the nozzles attached to coil springs on the spray boom, and with an adjustable mirror and adjustable guides located on the spray apparatus in view of the driver of the vehicle

Solenoid actuated valve device

Abstract: The solenoid actuated valve device is comprised of a housing of magnetic material having a radially disposed inlet and at least one axially disposed outlet in communication with the interior of a hollow magnetic core disposed within the body. An annular bobbin having a solenoid coil wound thereon is slidably mounted on the core and is normally biased into a position closing at least one elongated radially extending opening through the core. Permanent magnets are secured to the interior of the body in such a manner that the lines of flux intersect the solenoid coil at right angles thereto. Two springs normally bias the bobbin to the closed position and extend between one end of the bobbin and a spring support member disposed adjacent one end of the body. Each spring is connected to one end of the coil and to a respective electrical terminal for supplying electric current to the solenoid coil and the position of the spring support is adjustable relative to the end of the housing by means of a screw threadably extending through the end of the housing into engagement with the spring holder to vary the spring force acting on the bobbin. The connection between the two springs and the ends of the solenoid coil are insulated from the bobbin to prevent a short circuit which would deprive the solenoid coil of electric current. The connections between the two springs and the terminals are also encapsulated with insulating material subsequent to the adjustment of the spring holder relative to the end of the housing.

Helenoid actuators--a new concept in extremely fast acting solenoids

Abstract: Limitations of conventional solenoids and the relation between solenoid power and operational speed are examined. The action of Helenoid actuators in overcoming problems inherent in conventional solenoids is described. These actuators are capable of armature travel times in less than one millisecond, irrespective of preloads or masses, even with the larger size and power required as duty increases. The Helenoid armature can be designed with higher accelerations for smaller armature movements. For maximum acceleration, the relation among pitch, wall thickness, and thread form must be optimized for a given stroke. A computer program has been developed to calculate armature acceleration using small (under one microsecond), reiterative time steps. Factors affecting armature acceleration and features of Helenoid actuators are noted. Relationships between eddy currents and flux penetration, materials and flux leakage, and inductance and power supply are illustrated. A method for determining preliminary estimates of actuator size is appended.

Beverage portion controller

Abstract: An electronic controller for solenoid valve actuated beverage dispensers which allows the operator to automatically dispense properly filled cups of various sizes. Slideably mounted electronic probe is lifted by the lip of the cup positioned under the dispenser spout. Actuation of a switch energizes the solenoid valves starting the dispensing cycle. When the cup is filled to the level of the probe, the solenoid valves are de-energized. Early de-energization of the solenoid valves by bubbles is avoided by adjusting a time delay-off knob so that the proper level will be attained for each class of beverage. Too much or too little ice in the glass will not affect the level. Digital counters record the number of drinks served by size or price.

Ink jet printing apparatus with two different jet spacings

Abstract: Apparatus for applying characters to packages or other objects advanced through a marking station. The characters, which each consist of a pattern of points or spots, are applied by the discharge of ink onto the object from a plurality of nozzles arranged in a row extending transversally of the direction of advancement of the object. Each of the nozzles is connected through a solenoid valve to a source of pressurized ink. The solenoid valves are controlled by a pattern generator which at predetermined intervals selects solenoid valves to be activated and causes a simultaneous opening pulse to be supplied to the solenoid valves selected. The height of the characters can be varied by means of switch means whereby one or the other of two groups of solenoid valves, corresponding to two groups of nozzles in said row, is rendered available for the selection. One of said groups of nozzles is composed of every second nozzle of the other row and additional nozzles arranged with a pitch equal to twice the pitch of the nozzles of the other row.

Low temperature latching solenoid

Abstract: Disclosed is a magnetically latching solenoid including a pull-in coil and a delatching coil. Each of the coils is constructed with a combination of wire materials, including material of low temperature coefficient of resistivity to enable the solenoid to be operated at cryogenic temperatures while maintaining sufficient coil resistance. An armature is spring-biased toward a first position, that may extend beyond the field of force of a permanent magnet. When voltage is temporarily applied across the pull-in magnet, the induced electromagnetic forces overcomes the spring force and pulls the armature to a second position within the field of the permanent magnet, which latches the armature in the pulled-in position. Application of voltage across the delatching coil induces electromagnetic force which at least partially temporarily nullifies the field of the permanent magnet at the armature, thereby delatching the armature and allowing the spring to move the armature to the first position.

Control circuits for solenoids

Abstract: A solenoid control circuit includes a first switching element which connects one side of the solenoid load to earth via a current sensing resistor. The other side of the solenoid load is connected by a second switching element to a supply rail. This second switching element is biased to conduct but can be turned off by either of two comparators which are connected to compare the voltage across the current sensing resistor with two different reference voltages. Each comparator has hysteresis and the circuit operates so that one comparator operates to switch off the second switching element when a predetermined current level is reached and the other comparator operates to switch the second switching elements on and off at lower current levels between said predetermined current level and the lower threshold level of the first comparator.

Differential area electrohydraulic doser actuator

Abstract: A doser type hydraulic actuator includes a pair of unequal area pistons on a common shaft which are moved incrementally by injecting into or removing from a control pressure chamber metered quantities or doses of fluid. Doses are metered by timed openings of solenoid valves connecting the control pressure chamber to supply or return pressure sources. Special valve means are provided for moving the actuator piston to a preferred position in the event of control system failure, and means are included for administering very small doses consistently without recourse to special extra fast response solenoid valves.

Shift control device for automatic transmission

Abstract: A shift control device for an automatic transmission relating to this invention comprises: an electric control circuit comprising a means for generating an electric signal in accordance with the running conditions of the vehicle and a logic circuit for receiving the signals from said means and generating an electric output signal corresponding to one of the gears; a first solenoid to supply and discharge fluid pressure in fluid passages, said first solenoid acting in response to said electric output signal; a first shift valve operable between upshift and down-shift positions, the position of said first shift valve controlled by said first solenoid; a second solenoid to supply and discharge fluid pressure in fluid passages, said second solenoid acting in response to said electric output signal; and second and third shift valves operable between upshift and downshift positions, the positions of said second and third shift valves controlled by said second solenoid and by the position of said first shift valve; and two shift valves controlled by the second solenoid valve; whereby the shift control device performs automatic gear-shifting of an automatic transmission with four forward gears or one with three forward gears and a mechanical drive with a torque converter lock-up clutch engaged.

Probe for sensing characteristics of electrical devices utilizing a magnetic switch sensor biased by an encircling magnetic biasing means

Abstract: A probe for sensing energizations of electrical components and particularly the energization of a relay or solenoid, the probe utilizing a magnetic switch as a sensor, a light-emitting diode as an indicator and a battery as a power source, the elements encapsulated as a unit in an epoxy material.

Liquid agitation apparatus for an absorbance measuring apparatus

Abstract: A liquid agitation apparatus comprises a transparent reaction vessel for containing a reaction solution to be examined, a holder for holding the reaction vessel, and a rotary solenoid for imparting a mechanical vibration to the holder. The mechanical vibration from the rotary solenoid is effective to agitate the reaction solution automatically.

Hydrostatic transmission control system

Abstract: The hydrostatic transmission control system includes a first and second two-position solenoid valve which function to alter the hydraulic fluid parameters as delivered to the servo control cylinders of a variable displacement pump associated with a hydrostatic transmission. Activation of the first solenoid valve instigates a varying of pump displacement. Once the desired pump displacement has been achieved, the second solenoid valve is activated to maintain the desired pump displacement. The deactivation of both solenoid valves results in the hydrostatic transmission seeking and maintaining a neutral mode.

Steering column lock

Abstract: A tamper-resistant steering column lock incorporating an improved combination lock is disclosed. The improved combination lock includes an array of discs, each having an electrically conductive member extending therethrough. The disc at one end of the array is connected to the active terminal of the vehicle's electrical system and the disc at the other end of the array is grounded. When the discs are rotated to align the electrically conductive members, a circuit is completed to a solenoid or the like which regulates movement of a locking bolt between its locked and unlocked positions.

Safety jumper cables

Abstract: Intermediate the ends of jumper cables for the batteries of automotive vehicles is a relay. The relay has normally open contacts which are closed when the relay solenoid is energized. The relay solenoid is connected in series with the relatively strong battery to which the jumper cables are connectable and a push button switch at the end of an additional cable extending from the relay.

Material testing device

Abstract: A testing device for applying a force to a material test sample includes a test fixture for engaging the test sample and a solenoid, operatively coupled to the test fixture, for applying a predetermined force to the test sample in response to a solenoid control signal. A strain gauge is mounted on the test fixture and provides an electrical output indicative of the force applied to the test sample. A force setting circuit provides an electrical output indicative of the predetermined force which is to be applied to the test sample. A solenoid control circuit is responsive to the output from the strain gauge element and to the output of the force setting element and provides a control signal to the solenoid such that the predetermined force may be applied to the test sample. The force setting circuit provides an electrical output having an adjustable rate of increase and an adjustable maximum level. A sample circuit monitors the output of the strain gauge to store the peak force applied to the test sample. The testing device also includes a circuit for providing a visual indication of whether the test sample has withstood an adjustable force level.

Control system for laundry appliance

Abstract: A system (10) for controlling the flow of temperature selected water to the tub of a washing machine. Individual solenoid operated inlet valves (12,15) are employed to admit and control mixing of water from a heated and unheated source. The temperature selected mixed water is discharged through a third solenoid operated diverter valve (24) yielding a high rate of flow when the solenoid thereof is deenergized and a lower rate of discharge to the tub when the flow control valve solenoid is energized by the water level sensing switch (48) associated with the tub. A timer controlled switch (82) interrupts the power to the hot and cold filling valves to provide stepped filling during agitation during washing and rinsing cycles. The valve assembly employs only three solenoid valve operators.

Flat flexible printed circuit cable for a print head

Abstract: A print head of the dot matrix impact type is provided with a plurality of solenoid assemblies arranged in a circular array about the rearward portion of the print head. A thin flexible printed circuit cable encircles the solenoid assemblies and has imbedded therein thin flexible wires each terminating at one end in an exposed connecting terminal and connected at their opposite ends to a connector plug mounted upon the cable and adapted to releaseably receive a mating connector. Embedded in the cable are a plurality of flat rigid plates serving as a stiffening member, interlocking tab and tab receiving members, a clamping member having an elongated embracing tab and a locating member having a pair of locating tabs for positively locating and orienting the printed circuit cable relative to the solenoid assemblies and for securing the locating member to one of the solenoid assemblies to prevent the cable from sliding about the print head solenoid assembly array.

Method and apparatus for controlling automatic speed change of car

Abstract: PURPOSE:To perform speed change control suitably by detecting a driving speed of a car, an opening degree of a throttle and a plurality of parameters which constitute variation factors of loading conditions and by changing continuously the speed change pattern based on them. CONSTITUTION:Each output of a car speed detector 1, a constant setting apparatus 2, an EGR sensor 3, a cooler sensor 4, a load sensor 5, a firing angle sensor 6 and a slope sensor 7 is added to a characteristic arithmetic circuit 8, and each correction amount corresponded to change of parameters is added. A comparator 10 compares a calculated value of the arithmetic circuit 8 with an opening degree signal from a throttle opening degree sensor 9. A driving circuit 12 receives an output signal from the comparator 10 to drive a 1-2 speed change solenoid 13.

Stability of Intense Transported Beams

Abstract: At the previous National Accelerator Conference, the transport of intense ion beams, with particular reference to Heavy Ion Fusion, was analyzed by finding matched solutions of the coupled envelope equations. l) This work established relations between lattice structure, beam dimensions and space-charge tune depression as a function of intensity. In this paper we report on an investigation of the stability of the K-V distribution in transport by a periodic quadrupole system, a generalization of Gluckstern's analysis for a continuous solenoid 2) The results are presented and compared with simulation computations for a particular case; the results provide a prediction of maximum transportable current without degradation of emittance due to instability.

Vacuum impregnation with epoxy of large superconducting magnet structures

Abstract: The Lawrence Berkeley Laboratory (LBL) has been building a series of thin solenoid magnets for use in high energy physics experiments.1, 2 , 3 The LBL thin-magnet concept integrates a superconducting coil, a shorted secondary and a tubular cooling system into a single-coil package. The magnet coil is vacuum impregnated with a low viscosity epoxy which, after casting and curing, forms an integrated crack-resistant package.

Mirror driving device

Abstract: PURPOSE:To work reliably and to enable a response to a manual operation as well, by locating a clutch, which functions by means of a solenoid, so that the clutch will be hooked selectively in either one of screw bars situated on vertical and horizontal axis lines respectively which cross at right angles and at a position of a holder. CONSTITUTION:When driving a motor 9 after non-exciting a solenoid 19, the rotation of an output shaft 9 after non-exciting a solenoid 19, the rotatiion of an output shaft 9a is transferred to moving clutches 11b and 11c through the medium of worm 11 and a worm wheel 11a. Under such a condition as mentioned above, a moving clutch 14 and a stationary clutch 14 are hooked with each other, and the other moving clutch 11c and stationary clutch 14 are seperated from each other. And thus, a rotation force is transferred to a stationary clutch 13, and a screw bar 15 also ratates togetherwith and moves forward to and backward from a base plate through the nut action of a spring material 18. And as a result an angle of the mirror is regulated in a vertical direction. On the other hand, in the case of the solenoid being excited, an inclining angle of the mirror is controlled.

Automatic headlamp control system

Abstract: A motor vehicle headlamp control system wherein a two-position solenoid operated ratcheting switch conducts current from the storage battery to the headlamps. The position of the switch controls the energization of the headlamps and momentary energization of the solenoid changes the position of the switch. The driver may manually energize the solenoid to control the headlamps and the switch is automatically shifted to a position to deenergize the headlamps when the vehicle ignition key is shifted to an "off" position. Automatic turn-on and delayed turn-off functions are also provided.

Electron Model Experiment to Study Instabilities in Long Periodic Focusing Systems for Intense Beams

Abstract: The proposed use of intense beams of high-energy heavy ions for pellet fusion have renewed interest in the problem of space-charge limits in long periodic focusing systems. Recent analytical and numerical studies at Berkeley and NRL for beams with a K-V distribution indicate that instabilities may develop in such systems when the beam currents exceed certain thresholds. Since no relevant experimental data exists with which to compare the theory, we propose an inexpensive, small-scale experiment with a 5-20 kV electron beam to study this problem. The electron beam is injected into a periodic solenoid focusing system consisting of 20 solenoid lenses initially. The pertinent results of beam transport theory are reviewed and the design features of the electron beam experiment are presented.

Operation control device for hydraulic crane

Abstract: PURPOSE:To provide an operation control device which ensures the safety of the crane while permitting the crane to be self-returned to the safety position depending on the operation on the safe side by leaving the operation on the safe side alone continuing while the operation on the hazardous side is suspended when overload is applied. CONSTITUTION:When a detection switch 35 of a detector is closed as the boom length, the boom angle or the maximum lifting load exceeds the safety allowable limit, a relay coil 36 is energized to close a relay contact 37, causing respecitve solenoids 30a to 34a to be excited. Thus, solenoid valves 30 to 34 are opened. Consequently, pressure oil in hydraulic circuit 1a to 4a and 4b for driving the hazardous side in respective actuators 25 to 29 passes through vent circuit 25 to 29 and is drained to a tank 13 from tank circuit through the solenoid valves 30 to 34. At this moment, a normal pressure oil is fed to a hydraulic circuit 1b on the rope lowering side, a hydraulic circuit 2b on the boom reducing side and a hydraulic circuit 3b on the boom elevating side whereby the operation on the safe side can be done without trouble.

Fuel injection valve drive system

Abstract: A fuel injection valve drive system is disclosed for use in an internal combustion engine including at least one solenoid operated fuel injection valve. The system comprises a first pulse generator for providing, in synchronism with rotation of the engine, a first pulse signal having a constant pulse width, a second pulse generator for providing a second pulse signal of pulse width dependent upon the amount of air introduced to the engine, first switch means responsive to a first pulse signal for allowing small current to flow through the solenoid coil of the fuel injection valve so as not to open the fuel injection valve, and second switch means responsive to a second pulse signal for allowing large current to flow through the solenoid coil so as to open the fuel injection valve. Means are provided for causing the second pulse generator to generate a second pulse signal a time after the first pulse generator generates a first pulse signal.