Topic
Solenoid
About: Solenoid is a research topic. Over the lifetime, 19278 publications have been published within this topic receiving 114721 citations.
Papers published on a yearly basis
Papers
More filters
Patent•
15 Apr 1983
TL;DR: In this article, the push-rod of a stationary solenoid at each of four stationary coin-selection stations projects upwardly into the annular gap between the periphery of the disc and the abutment member.
Abstract: Coin to be sorted is discharged onto a rotating horizontal disc (1) to be urged, after passage through a separation slot (13) of a wear strip (12), against a stationary abutment member (14) that encircles the disc (1). The push-rod (20) of a stationary solenoid (18) at each of four stationary coin-selection stations (17) projects upwardly into the annular gap (15) between the periphery of the disc (1) and the abutment member (14). The solenoid (18) is energized transitorily from coin-sensor (19) of the respective coin-selection station (17) whenever a coin that is to be selected enters that station (17) on the disc (1), so that the rod (20) moves upwardly through the gap (15) to tip the overlying coin over the abutment member (14) and thereby free it to pass from the disc (1) into an associated outlet port (21).
25 citations
Patent•
01 Feb 1985
TL;DR: In this paper, a valve closure member in the bore of a housing moves between open and closed positions and is controlled by a tubular member which is biased in a direction to close the valve.
Abstract: A subsurface solenoid operated well safety valve which is locked in the open position, after being opened by the solenoid, for preventing the valve from closing by various forces overcoming the solenoid. A valve closure member in the bore of a housing moves between open and closed positions and is controlled by a tubular member which is biased in a direction to close the valve. An armature is movable in the housing and a solenoid coil is energized to move the armature. A first releasable lock connects the armature to the tubular member for allowing the movement of the solenoid to open the valve. The first lock is released when the valve is opened. A second releasable lock locks the tubular member to the housing in the open position prior to the release of the first lock means. The de-energization of the coil releases the armature and the second lock to allow the valve to close.
25 citations
TL;DR: In this article, a computer model is described which is capable of predicting the maximum current, the ''threshold current'' which can be carried without quenching a Nb-Ti copper composite superconductor undergoing flux jumping.
Abstract: A computer model is described which is capable of predicting the maximum current, the ``threshold current'', which can be carried without quenching a Nb–Ti copper composite superconductor undergoing flux jumping. The model utilizes standard equations governing the generation and flow of heat in a wire to predict its voltage‐versus‐time response as a function of current. Calibration of the model for any specific thermal environment is done by means of a simple test procedure involving measurement of the response following the triggering of a flux jump in a small noninductively wound solenoid of one to four layers. The combination of theoretical and experimental techniques indicates the value of adequate copper cross section and good thermal environment, and suggests the superiority of porous fabric or cadmium foil over more conventional interleaving materials, and of thin insulation over the alternatives of thick insulation or none at all.
25 citations
Patent•
05 Apr 1989
TL;DR: In this article, an improved method for controllably positioning the plunger of a solenoid apparatus at a target position between its two extreme positions is presented, where a spring bias is biased to a retracted position, and an electrical coil is intermittently pulsed to drive plunger against the spring bias toward an extended position.
Abstract: An improved method for controllably
positioning the plunger of a solenoid apparatus at a
target position between its two extreme positions.
The plunger is spring biased to a retracted position,
and an electrical coil is intermittently pulsed to
drive the plunger against the spring bias toward an
extended position, such that the plunger oscillates
about the target position. A precise, stable control
of the plunger's oscillating motion about the target
position is achieved by continuously measuring the
plunger's actual position, in real time, based on a
series of measurements of electrical current conducted
through the electrical coil when it is being pulsed.
25 citations
TL;DR: In this article, the MICE spectrometer solenoid provides a uniform field for scintillating fiber tracker, which is produced by a long center coil and two short end coils, together with a uniformity of better than 1% over a detector region of 1000 mm long and 300 mm in diameter.
Abstract: The purpose of the MICE spectrometer solenoid is to provide a uniform field for a scintillating fiber tracker. The uniform field is produced by a long center coil and two short end coils. Together, they produce 4T field with a uniformity of better than 1% over a detector region of 1000 mm long and 300 mm in diameter. Throughout most of the detector region, the field uniformity is better than 0.3%. In addition to the uniform field coils, we have two match coils. These two coils can be independently adjusted to match uniform field region to the focusing coil field. The coil package length is 2544 mm. We present the spectrometer solenoid cold mass design, the powering and quench protection circuits, and the cryogenic cooling system based on using three cryocoolers with re-condensers.
25 citations