An actuator assembly operates a device in a normally open mode and a normally closed mode. The actuator assembly includes a bobbin around which a coil is wound. The coil receives an electrical current to induce a magnetic field thereabout. A rod extends along the longitudinal axis. The rod is movable along the longitudinal axis in response to the magnetic field. The actuator assembly also includes a plunger extending through a portion of the bobbin. The plunger is movable with respect thereto in...

A normally off JFET is formed by the implantation of a P base; and a shallower P island atop the P base, forming a narrow lateral conduction channel between the two and a shallow gate implant in the device top surface which forms a second lateral conduction channel with the island. The two channels are each less than 0.5 microns thick and have an impurity concentration such that the channels are depleted at zero gate voltage and are turned on when the gate is forward biased. The gate surrounds a...

A miniaturized multilamp photoflash array having a plurality of flashlamps affixed to a printed circuit on the inner surface of a circuit board with a continuous strip of switching material forming a plurality of normally closed (N/C) switches coupling the flashlamps to a common conductor and a plurality of normally open (N/O) switches coupling all but one of a plurality of flashlamps to an energizing conductor.

A normally closed electromagnetic valve has a cylindrical valve housing; a valve seat member; a fixed core; a movable core; a valve body; a return spring; and, a coil, one side of the valve housing being housed in a mounting hole opened on one end of a substrate so as to be restricted in axial movement thereof toward the interior of the mounting hole, wherein a large diameter portion is provided in the axially middle portion of the valve housing, the cylindrical valve seat member forms an annula...

A normally closed AC relay having a stator core with primary and shaded poles, an operating coil mounted on the stator core to magnetically attract a pivotal clapper in one pivotal direction thereof toward the stator pole against the bias of a return spring, the clapper and/or stator core having a reduced transverse section in the magnetic loop of the operating coil with a cross-sectional area equal to or less than that of the primary pole to control the magnetic field across the working air gap...

A normally closed electrical switch includes a first circuit board having a first switch contact thereon and an aperture therethrough near the first switch contact. A second, flexible circuit board has a second switch contact aligned with the first switch contact of the first circuit board. A spacer sheet separates the first and second circuit boards and has an aperture in registry with the aperture in the first circuit board. The switch contacts extend toward each other through the aperture in ...

A valve having two elements each with a respective passageway, with one of the elements having a support and the other element having a shoulder, and a disc mounted between the elements and partially flexed over the support to form a seal on the shoulder preventing flow between the passageways until a relative pressure differential between the passageways fully flexes the disc over the support to allow flow between the passageways.

A microvalve with a normally closed state includes a membrane, an actuation means for controllable deformation of the membrane as well as a valve shutter deformable by the controllable deformation of the membrane. The valve shutter at least partially opposes the membrane and rests, in a first position in the normally closed state of the valve, along a sealing lip arranged between the valve shutter and the membrane. The sealing lip is arranged such that an outlet of the valve, which outlet is in ...

A normally closed solenoid valve includes a fixed core, a valve portion including a valve seat and a valve body, a movable core disposed between the fixed core and the valve seat, a resilient biasing member for biasing the movable core in a valve-closing direction and a coil. When energized, the coil generates an attracting force between the movable core and the fixed core against a biasing force by the resilient biasing member to cause the movable core to retreat from an initial position where ...

The present invention relates to a component forming a normally on dual thyristor, which can be turned off by a voltage pulse on the control electrode, including a thyristor, a first depletion MOS transistor, the gate of which is connected to the source, connected between the anode gate and the cathode of the thyristor, and a second enhancement MOS transistor, the gate of which is connected to a control terminal.