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Showing papers on "Solenoid published in 1972"


Patent
31 May 1972
TL;DR: In this article, an electromagnetic pressure-telecontrolling valve is described in which the valve inserted in a valve port is pressed by a pressure-controlling spring in the influence of a solenoid applied with a current.
Abstract: This invention provides an electromagnetic pressure-telecontrolling valve characterized in that the valve inserted in a valve port is pressed by a pressure-controlling spring in the influence of a solenoid applied with a current, and that the hollow interior of said solenoid is filled with a damping oil so as to give a damping effect to an induced iron core.

62 citations


Patent
Takezo Takada1
08 Jun 1972
TL;DR: In this paper, a vehicle safety belt system includes a spring rewind belt retractor reel provided with a solenoid actuated brake and a network controlled by an inertia switch to brake the reel by the energization or deenergization of the soleneoid and to maintain the reel in a braked condition.
Abstract: A vehicle safety belt system includes a spring rewind belt retractor reel provided with a solenoid actuated brake and a network controlled by an inertia switch to brake the reel by the energization or deenergization of the solenoid and to maintain the reel in a braked condition an adjustable time interval following the deactuation of the inertia switch. The network includes a solid state Darlington switch having across its input a memory capacitor which is charged by the actuation of the inertia switch and a relay across its output which controls the brake solenoid.

48 citations


Patent
24 Aug 1972
TL;DR: In this paper, a time delay switching mechanism with a motor and a solenoid controlled by a room thermostat is proposed to prevent refrigeration compressor burnout by short cycling.
Abstract: Protection against refrigeration compressor burnout by short cycling is provided by a time delay switching mechanism having a motor and a solenoid controlled by a room thermostat. The motor runs continuously and the solenoid stops and starts the timer by stalling or releasing the timer gear. The timer gear has teeth omitted at the stalling points to allow the motor to run free. A starter cam follower bearing on a starter cam serves to start the timer gear when released by the solenoid. The solenoid operates the stalling and switch control mechanism through a compound leverage and camming system compensating for the non-linear pull curve of the solenoid. The device also includes a combination cam and latch operated switch in which one switch blade carries a follower lifting another blade which is then held by the latch when the follower drops to close the switch. A manual operator is provided for closing the switch independently of the timing mechanism. This manual operator is released automatically by the solenoid dropping out when the thermostat becomes satisfied. The timer also includes an arrangement for locking the compressor switch closed for a period of time when it first closes to allow the system to settle down and thus avoid short cycling.

46 citations


Patent
12 Jul 1972
TL;DR: In this paper, the authors propose a fail-safe mechanism for solenoid actuated devices, such as door locks, valves and the like, where the actuated element is activated by a compression spring to an inactive position.
Abstract: Fail-safe means for solenoid actuated devices, such as door locks, valves and the like, wherein the actuated element is operable to an active position upon energization of the solenoid, and upon deenergization of the solenoid is activated by a compression spring to an inactive position. A pair of permanent magnets provide the fail-safe feature, whereby the actuated element will be moved to its inactive position, in the event of spring failure. One of these magnets is fixedly mounted, and the other is carried by the actuated element, the magnets being so oriented as to present closely confronting like magnetic poles in a repulsion mode when the actuated element is in its active position.

42 citations


Patent
26 Jun 1972
TL;DR: A control valve device for refrigeration systems in which a solenoid includes an electromagnetic coil about a plunger and a plug is described in this paper, where the plunger moves a valve member to control flow through a valve located in the system.
Abstract: A control valve device for refrigeration systems in which a solenoid includes an electromagnetic coil about a plunger and a plug, the plunger and plug having opposed surfaces with a magnetic gap therebetween, and the opposed surfaces having compatible substantially conical shapes. An electrical amplifier circuit is connected to the coil and includes a temperature sensing element positioned to respond to temperature at a selected location in the refrigeration system and thereby correspondingly regulates D.C. voltage applied to the coil and the resultant magnetic field acting on the plunger, the plunger moving a valve member to control flow through a valve located in the system. The substantially conical opposed surfaces of the plunger and plug providing a magnetic gap have an included angle of about 30* to about 60*, and preferably of about 45*. A spring device urges the plunger in one direction, the spring device having force characteristics that approximate the force characteristics of the magnetic field so that the plunger movement is substantially linearly proportional to the change in D.C. voltage.

31 citations


Journal ArticleDOI
TL;DR: In this paper, the magnetic field gradients produced by a current sequentially activating a few turns of wire of a precision solenoid are used to measure its pitch, and the position of the activated portion of wire can be resolved to 0.1?m.
Abstract: The magnetic-field gradients produced by a current sequentially activating a few turns of wire of a precision solenoid are used to measure its pitch. The position of the activated portion of wire can be resolved to 0.1 ?m. Preliminary results are found to be in agreement with an earlier measurement using a contacting probe to within the uncertainty of the latter determination. This new technique reduces many of the difficulties associated with conventional pitch measuring schemes and at the same time provides a method of obtaining increased accuracy.

31 citations


Patent
13 Apr 1972
TL;DR: In this paper, a four-way solenoid selector valve comprising a valve spool slidable in a housing bore, input, outlet and return ports communicating therewith, a chamber piston mounted on the one end of the spool, subject to fluid pressure changes on its faces to cause its axial translation in either direction, and restrictive orifices disposed in passageways communicating with the piston chamber.
Abstract: A four-way solenoid selector valve comprising a valve spool slidable in a housing bore; input, outlet and return ports communicating therewith; a chamber piston mounted on the one end of the spool, subject to fluid pressure changes on its faces to cause its axial translation in either direction; and restrictive orifices disposed in passageways communicating with the piston chamber. Solenoid actuated poppet valves close and open such passageways to the return port while ducts which communicate with the input port are connected to the poppet valves. Energization of a solenoid of one or the other of such valves provides uncovering of corresponding metering slots for the two outlet ports as a result of translation of the valve spool. The corresponding restrictive orifice controls or programs the rate of flow from the piston chamber so as to effect a relatively slow time span desired in opening or uncovering such metering slots. A spring system mounted at the other end of the spool, in a cavity, is provided to return the selector valve to its neutral state upon de-energization of the solenoid.

29 citations


Patent
25 Jul 1972
TL;DR: In this article, an electrical oscillator means operated by a program timer is used to control the cyclical opening and closing of a solenoid valve, which functions to control application and relief of pneumatic pressure to a plurality of additive metering pumps.
Abstract: Additives used in a laundering operation are automatically injected into the wash load by the use of a programmed electropneumatic system. An electrical oscillator means operated by a program timer is used to control the cyclical opening and closing of a solenoid valve. The solenoid valve functions to control the application and relief of pneumatic pressure to a plurality of additive pneumatic metering pumps, and additional solenoid valves also operated by the program timer determine which of the metering pumps are actuated by the cyclical pneumatic pressure pulses obtained from said cyclically operating valve.

28 citations


Patent
31 May 1972
TL;DR: In this paper, an electromagnetic flow controlling valve wherein a spring actuated by the magnetic pull force excited by a DC solenoid can provide a variable opening between a fixed sleeve and a movable spool, so as to control the quantity of flow according to the variable size of the opening.
Abstract: An electromagnetic flow controlling valve wherein a spring actuated by the magnetic pull force excited by a DC solenoid can provide a variable opening between a fixed sleeve and a movable spool, so as to control the quantity of flow according to the variable size of the opening.

28 citations


Patent
20 Jun 1972
TL;DR: A fluid flow control device including a body having a plurality of inlet passageways and a single common outlet passageway is described in this article, where a solenoid valve is connected to the body for controlling fluid flow from the inlet passesageways to the outlets.
Abstract: A fluid flow control device including a body having a plurality of inlet passageways and a single common outlet passageway, and a plurality of solenoid valves connected to the body for controlling fluid flow from the inlet passageways to the outlet passageway The device and the solenoid valves are resistant to corrosive liquids The amount of residual-liquid left in any inlet passageway downstream from each solenoid valve when that valve is closed is minimized, to provide as sharp a liquid interface as is possible between each liquid leaving the outlet passageway and the next successive liquid

28 citations


Patent
22 Dec 1972
TL;DR: In this paper, a solenoid operated control valve for establishing an operational pressure differential in a servomotor located in a trailer to activate the wheel brakes of the trailer in response to an operational electrical signal derived from corresponding hydraulic actuation of the wheel brake of a tow vehicle.
Abstract: A solenoid operated control valve for establishing an operational pressure differential in a servomotor located in a trailer to activate the wheel brakes of the trailer in response to an operational electrical signal derived from corresponding hydraulic actuation of the wheel brakes of a tow vehicle.

Patent
09 Feb 1972
TL;DR: An adjustable clamp circuit comprising a Darlington switching pair of transistors biased by a voltage divider for permitting the maximizing of a solenoid repetition rate without exceeding the breakdown limit of the driving transistor is described in this article.
Abstract: An adjustable clamp circuit comprising a Darlington switching pair of transistors biased by a voltage divider for permitting the maximizing of a solenoid repetition rate without exceeding the breakdown limit of the solenoid driving transistor.

Journal ArticleDOI
TL;DR: In this paper, a computer program is described which enables calculations to be made of all components of the stress in uniform current density coils used for producing intense magnetic fields, but the technique is appropriate to all types of solenoids including superconductors.
Abstract: A computer program is described which enables calculations to be made of all components of the stress in uniform current density coils used for producing intense magnetic fields. Particular reference is made to wire-wound pulsed field coils, but the technique is appropriate to all types of solenoids including superconductors. The effect of the elastic properties of the insulation is taken into account and shown to be important. Three separate types of coil are considered: unreinforced coils; coils reinforced with external cylinders; and coils reinforced with both external and internal cylinders. Charts are presented which give the maximum stress differences ΔS=Sθ-Sz and hence the maximum field strength for different geometries and cylinder thicknesses. Experimental results are presented for tests on a particular pulsed field solenoid wound from copper wire. These results are shown to be in agreement with the predicted values.

Patent
08 Nov 1972
TL;DR: In this paper, a combination harvester with a trap door in the path of feeding of crop material is held in a closed position by a solenoid controlled latch by an electronic rock-detection circuit.
Abstract: A stone trap door in the path of feeding of crop material in a combine harvester is held in a closed position by a solenoid controlled latch. The solenoid is energized to open the stone trap door and an electric clutch is de-energized to stop the drive mechanism by an electronic rock-detection circuit. The rock-detection circuit includes a piezo-electric ceramic disc attached to the bottom of the table to detect vibrations induced in the bottom of the table by material conveyed along the bottom of the table toward the trap door. The piezoelectric ceramic disc produces output signals which vary in frequency and amplitude depending upon the frequency and amplitude of the vibrations induced in the bottom of the table. The signals produced by rocks or other hard objects are amplified and rectified to energize the solenoid and a relay to open the stone trap door and to deenergize the electromechanical clutch means to stop the crophandling drive mechanism.

Patent
21 Apr 1972
TL;DR: In this paper, a solenoid for use within the exposure control system of a thin, compact automatic camera is presented, which develops a desirable flat force-stroke characteristic while operating under limited power supplies.
Abstract: A solenoid for use within the exposure control system of a thin, compact automatic camera. The solenoid develops a desirable flat force-stroke characteristic while operating under limited power supplies. To achieve this necessary characteristic, the confronting end faces of the armatures of the solenoid are configured to form peripherally disposed extensions and complementary recesses having corresponding relatively shallow conical confronting surfaces. Additionally, the end faces are formed to provide peripherally disposed seating surfaces to permit nested holding forces under significantly reduced current levels.

Journal ArticleDOI
TL;DR: In this article, a method for calculating the current distribution and power loss in the individual turns of helical solenoids of nonmagnetic materials is presented, with or without a circular billet located inside the solenoid.
Abstract: A method is presented for calculating the current distribution and power loss in the individual turns of helical solenoids of nonmagnetic materials. Examples are presented pertaining to 5- and 14-turn coils with or without a circular billet located inside the solenoid. In addition, experimental results are included showing the excellent agreement between theory and practice.

Patent
G Hause1
24 Nov 1972
TL;DR: When the shift lever of a geared transmission is moved to change the gear ratio, a solenoid is energized to rotate the engine ignition distributor to a maximum spark retard position reducing engine torque to an operating minimum during the shift transition.
Abstract: When the shift lever of a geared transmission is moved to change the gear ratio, a solenoid is energized to rotate the engine ignition distributor to a maximum spark retard position reducing engine torque to an operating minimum during the shift transition. As the shift is completed the solenoid is deenergized so that the distributor is adjusted to a spark advance position providing the appropriate firing of the combustion chambers for good engine performance.

Patent
07 Jan 1972
TL;DR: In this article, a rotary switch having a predetermined number of positions is interconnected with a plurality of pushbutton switches, so that for any position of the rotary switches one of four push-button switches may be selectively actuated.
Abstract: A new and improved switch controller is described which permits any one of a predetermined number of switch controlled devices to be actuated in any one of a predetermined number of states In the embodiment described, a rotary switch having a predetermined number of positions is interconnected with a plurality of pushbutton switches, so that for any position of the rotary switch one of four push-button switches may be selectively actuated Each push-button switch can actuate the winding of a relay which in turn closes its associated contacts to provide current to the solenoid of a solenoid activated device Thus, the rotary switch selects the apparatus to be actuated, while the selected pushbutton switch determines which solenoid winding associated with the selected apparatus will be energized with current Described in conjunction with the aforesaid switch control device is a particular solenoid actuated device, comprising a unit for operating hydraulic valve box plungers

Patent
21 Aug 1972
TL;DR: In this paper, a valve of the cage type has a pilot control seal connected to a solenoid assembly for operation by usual pilot means for medium and high pressure systems and in addition has a lost-motion connection between the soleneoid assembly and a control piston.
Abstract: A valve of the cage type has a pilot control seal connected to a solenoid assembly for operation by usual pilot means for medium and high pressure systems and in addition has a lost-motion connection between the solenoid assembly and a control piston that contains the pilot control seal. After the pilot control seal is operated, the solenoid assembly applies force through the lost-motion connection to move the control piston to an open position to provide positive control when the pressure is too low to operate the valve by pilot means only.

Patent
D Merriner, M Saarem1
24 Jul 1972
TL;DR: An improved solenoid valve operator is presented in this article, which is particularly suitable for use in conjunction with valves in vending machines for hot liquids, such as coffee, or the like.
Abstract: An improved solenoid valve operator is provided which is particularly suitable for use in conjunction with valves in vending machines for hot liquids, such as coffee, or the like. The valve operator of the invention includes a plastic molded casing which encloses the operating components of the solenoid operator, and which includes a tubular member that contains the core of the solenoid and the slidable plunger. The plastic casing defines a peripheral channel about the end of the tubular member, and an O-ring is received in the peripheral channel. The O-ring provides a seal between the plastic casing and the fluid controlled by the valve, so that only corrosion resistant and non-reactive materials are exposed to the fluid.

Journal ArticleDOI
TL;DR: In this article, a magnetic hysteresis loop tracer was built to measure the magnetic properties of small cylindrical samples of nonconductive ferromagnets, using a water cooled solenoid driven at 60 Hz, and the change in flux was detected with a coil on the sample.
Abstract: A magnetic hysteresis loop tracer has been built to measure the magnetic properties of small cylindrical samples of nonconductive ferromagnets. Applied fields of 10 000 Oe peak amplitude are obtained from a water cooled solenoid driven at 60 Hz, and the change in flux is detected with a coil on the sample. Two operational amplifiers convert the input variables to analogs of the local field H and the induction B or magnetic intensity I. The sample area and demagnetizing factor are used as parameters, and a correction is made for the excess coil area. Tests indicate that correct loops are produced except when the demagnetizing factor and the excess coil area are both large. Application to the rapid determination of the magnetic properties of hard ferrites is illustrated. The apparatus may also be used to magnetize and demagnetize samples and measure the permeabilities in both states.

Patent
17 Aug 1972
TL;DR: In this article, a solid state low power circuit for controlling an AC solenoid, comprising of a power section and a control section, is presented, where the power section is adapted to receive AC power from a conventional source; it provides low AC power to the control section.
Abstract: A solid state low power circuit for controlling an AC solenoid, comprising a power section and a control section. The control section provides a means which responds to the conductivity of a fluid, preferably a low impedance probe, and a means for switching AC power to a solenoid when the conductivity falls below a predetermined level. Typically, the present invention is used to control the concentration of a particular material in a fluid such as, for example, the concentration of a detergent in the water bath of a commercial dishwashing apparatus. The invented circuit monitors the concentration of the material in the fluid and activates an AC solenoid when additional material is required. The solenoid, when activated, causes the controlled material to be dispensed into the fluid. The power section is adapted to receive AC power from a conventional source; it provides low AC power to the control section. A preferred embodiment of the power section has an automatic turn-on capability provided by the use of the low impedance probe which detects the presence of the fluid (typically water) in the vicinity of its supply source. The present invention is adapted to operate with an electronic alarm and an electronic monitor section. The alarm section provides an audio and visual indication when the conductivity of the fluid, i.e., the concentration of the controlled material, reaches a predetermined alarm level. The monitor section provides a meter which, when properly calibrated, indicates the conductivity of the fluid and, therefore, the concentration of the controlled material therein. The present invention is characterized by a high degree of sensitivity to changes in the concentration of the controlled material, very sharp turn-on and turn-off of the solenoid without bounce, great accuracy or resolution of control, and relative insensitivity to temperature changes of the fluid.

Patent
24 Feb 1972
TL;DR: In this paper, a panic control device is used to retract a pair of bolts movable mounted in the door. Buttons are inserted into the panic crash bar to prevent outward movement of the crash bar and the bolts remain in the retracted position even though the main solenoid is deactivated.
Abstract: A system for controlling both mechanically and electrically a panic control device for a door. The panic control device is operable to retract a pair of bolts movably mounted in the door. A main solenoid has a plunger connected to the linkages which connect the panic control device to the bolts. By moving the plunger of the main solenoid, the linkages are moved to retract the bolts. An electrical switch is connected between a source of electrical energy and the main solenoid and has an actuating arm movable by the linkages. Initial downward movement of the panic control device causes the linkages to actuate the switch thereby connecting the main solenoid to a source of electrical energy and allowing the main solenoid to complete the retraction of the bolts. A second solenoid has its plunger connected to a dogging mechanism which is provided with a stop positionable adjacent the panic crash bar. Operation of the second solenoid prevents outward movement of the panic crash bar thereby insuring that the bolts remain in the retracted position even though the main solenoid is deactivated.

Patent
10 Jul 1972
TL;DR: In this article, a solenoid having a pull-in coil and a holdin coil is adapted to be mounted within the seat back of the front seat of a vehicle such that the plunger associated with the solenoids can be actuated to release the seat locking mechanism.
Abstract: A solenoid having a pull-in coil and a hold-in coil is adapted to be mounted within the seat back of the front seat of a vehicle such that the plunger associated with the solenoid can be actuated to release the seat locking mechanism. As one of the doors of the vehicle is opened, the solenoid is actuated to unlock the seat-locking mechanism and maintain the mechanism unlocked to allow the seat backs to be moved forward. The pull-in coil is automatically actuated for a predetermined time sufficient to ensure the plunger has been moved to unlatch the locking mechanism after which the pull-in coil is deactuated. The hold-in coil is continuously actuated while the vehicle door is open.

Patent
26 Dec 1972
TL;DR: In this article, an electrically operated hydraulic control valve including a valve body having an open ended bore, an inlet passage, a pair of fluid flow passages and a return passage connected to said bore, a valve spool mounted in said bore to control the fluid flow from said flow passages to said flow passage and return passages, and a solenoid controlled pressure circuit connected to controlling the position of the valve's spool in the bore, said pressure circuit including a pressure reducing valve to maintain reduced pressure in the control circuit.
Abstract: An electrically operated hydraulic control valve including a valve body having an open ended bore, an inlet passage, a pair of fluid flow passages and a return passage connected to said bore, a valve spool mounted in said bore to control the fluid flow from said inlet passage to said flow passages and return passages, and a solenoid controlled pressure circuit connected to control the position of the valve spool in the bore, said pressure circuit including a pressure reducing valve to maintain reduced pressure in the control circuit, and a pair of solenoid operated valves which are selectively operable to reduce the pressure at one end of the bore to allow the pressure at the other end of the bore to move the valve spool.

Patent
L Guth1
27 Jul 1972
TL;DR: In this article, the authors presented a system for connecting a sequentially controlled washing machine to a faucet supplying liquid under line pressure, including a coupling attachable to the faucets and a multipassageway conduit connecting the coupling to the machine.
Abstract: By the present invention there is provided a system for connecting a sequentially controlled washing machine to a faucet supplying liquid under line pressure, including a coupling attachable to the faucet and a multipassageway conduit connecting the coupling to the machine. A solenoid controlled water valve is encapsulated in the housing between the line pressure faucet inlet area and an outlet area communicating with a passageway in the conduit for introducing water at flow pressure to the washing machine only when the solenoid controlled water valve is energized. The electrical wires necessary for energizing the solenoid valve at predetermined times in the machine cycle are brought to the solenoid from the machine sequence control system through another passageway in the conduit. Effluent from the washing machine is directed through still another passageway in the conduit and discharged through an appropriate passageway in the housing.

Patent
24 May 1972
TL;DR: In this article, the solenoid valves are driven by a variable frequency oscillator and the frequency of the oscillator is controlled in accordance with the average quantity of air sucked by the engine per unit time.
Abstract: In a fuel injection apparatus for an internal combustion engine, including a fuel pump for feeding fuel from a fuel tank to a fuel distributor, an overflow valve for regulating the pressure of the fuel in said fuel distributor and solenoid valves provided in the same number as the number of cylinders of the engine and connected to said fuel distributor to act as fuel injection valves, said solenoid valves are driven by a variable frequency oscillator and the frequency of said variable frequency oscillator is controlled in accordance with the average quantity of air sucked by the engine per unit time and further said solenoid valves are opened and closed by means of a pulse row independent of the engine speed.

Patent
04 Dec 1972
TL;DR: In this article, a solenoid operated valve with a free floating sliding spool is provided with an improved detent device loosely caged in the body of the valve and slidingably engaging the spool to frictionally restrain longitudinal movement thereof.
Abstract: A solenoid operated valve having a free floating sliding spool is provided with an improved detent device loosely caged in the body of the valve and slidably engaging the sliding spool to frictionally restrain longitudinal movement thereof.

Patent
J Ford1
14 Dec 1972
TL;DR: In this article, a method and apparatus capable of being used with a fluxgate magnetometer or similar solenoid type device to compensate for temperature dependent variations in a reference magnetic field produced during operation of the device is described.
Abstract: The present invention relates to a method and apparatus capable of being used with a fluxgate magnetometer or similar solenoid type device to compensate for temperature dependent variations in a reference magnetic field produced during operation of the device. A compensation solenoid is added and the effect of the temperature coefficient of resistivity of this compensation solenoid is used to compensate for the effect of the temperature coefficient of expansion of the reference field-producing solenoid.

Patent
31 Aug 1972
TL;DR: A triggering circuit for a plurality of printing solenoids that insures the uniform density of the printed matter by producing actuating pulses of a duration varying as an inverse function of the supply voltage is described in this article.
Abstract: A triggering circuit for a plurality of printing solenoids that insures the uniform density of the printed matter by producing actuating pulses of a duration varying as an inverse function of the supply voltage. The natural energy integration of printing solenoids causes the solenoid to print with a uniform force in response to short-duration, high voltage energization, and longduration, low voltage energization.