Abstract: A vehicle capable of running by using dynamic power of a motor includes: a battery to perform input/output of electric power for the motor; a fuse to be connected in series with the battery and to melt when an electric current exceeding a permissible value flows; and a control apparatus to restrict magnitude of the input/output electric power of the battery to less than an upper limit electric power. The control apparatus calculates a degradation level of the fuse such that degradation proceeds whenever temperature of the fuse exceeds a threshold temperature, and reduces the upper limit electric power when the degradation level of the fuse exceeds a target degradation level. The target degradation level is a value that is lower than a limit degradation level corresponding to a degradation level when the degradation of the fuse reaches a limit and that becomes higher as mileage of the vehicle increases.

Abstract: An apparatus, system, method, and article for a multi-tap microelectromechanical inductor are described. The apparatus may include an inductor formed on a substrate, a switching mechanism contacting the inductor to vary inductance of said inductor; and a disconnect mechanism contacting the inductor to reduce parasitic effects of the inductor upon actuation of said switching mechanism. Other embodiments are described and claimed.

Abstract: The invention concerns an inductance device formed on the basis of an asymmetrical line. This inductance device includes a plane conductor, preferably cylindrical, a linear conductor extending along and close to the plane conductor and having one end short-circuited with the plane conductor. Positioning devices make it possible to keep the linear conductor in a determined position in relation to the plane conductor. The inductance device is particularly used for the manufacture of power inductances for short waves.

Abstract: A variable inductor provided with an inlet electrode and an outlet electrode, and including an inductive section having one end connected to the inlet electrode, electrically conductive moving equipment being provided with a moving contact for establishing a connection with the inductor section and being provided with means for connection to the outlet electrode, the inductor being wherein the moving contact is disposed in the proximity of the inductive section, with the connection therebetween is established by means of an electric arc.

Abstract: A variable inductance RF coil assembly including an air-core, high-voltage coil, a printed circuit board installed inside of the coil, the circuit board carrying a plurality of switch contacts corresponding in location and in number to the turns of the air coil, a contact plate attached to the circuit board and having contact fingers corresponding in location and in number to the switch contacts, and a rotary, stepped cam cylinder mounted to the circuit board, the cams corresponding in location and number to cam-follower sections of the contact arms on the contact plate. Unidirectional rotation of the stepped cam cylinder causes progressive communication between the cam steps and the cam-follower sections. Such communication causes the contact arms to connect with the switch contacts on the circuit board thereby progressively and continuously shorting out each successive turn of the coil thereby to adjust the inductance thereof.

Abstract: An electromagnetic projectile launching system is provided with a pair of conductive projectile launching rails which are connected to a high current inductive power source. Current from an inductive energy storage coil is switched to the launcher rails to successively launch a series of projectiles. As each projectile is launched, the inductance of the coil is reduced to increase inductor current so that each successive projectile is launched at approximately the same muzzle velcoity.

Abstract: A 60 VA transformer is described. A recycling circuit breaker mounted on and connected in series with the secondary winding of the transformer preserves the integrity of the transformer and permits its continued use after a short circuit. A thermal fuse mounted on and connected in series with the primary winding provides short circuit protection in the event the circuit breaker fails in a closed position. Achievement of this end is attained by decoupling the transformer windings to reduce short circuit, secondary current flow. Decoupling is provided by spacing the transformer windings a distance of about 0.090 in. A controlled failure mode provides energy limiting protection for the secondary load circuit in the event of circuit breaker failure in the closed position. Controlled failure is provided by the use of secondary insulation which melts within one minute of a short circuit, permitting turns of the secondary winding to short and reduce current flow to eight amp. within the one minute period.

Abstract: An electric transformer for supplying an adjustable electric magnitude, especially for regulating purposes, includes several modules having therebetween a binary progression relationship with respect to their power handling capabilities. Each module has a switching network for selectively rendering it operative or inoperative and, each module has at least one primary circuit input coil, the primary coils of each of the modules cooperating with one single secondary output circuit which is common to all of the modules. The switching network of each module being so connected as to allow the neutralization of the effect of the electronic induction of its respective primary coil or coils on the common secondary circuit, while maintaining the magnetic activity of the primary circuits.

Abstract: Apparatus for controlling power transfer in an electrical induction device uses a controlled reactance to regulate the power transferred from an alternating current power source to a load without distorting or degrading the transferred power waveshape. The apparatus includes a power transformer having a power core and a primary coil and a secondary coil each encircling the power core. A number of control cores, separate from the power core, have associated control coils which are selectively short-circuited to provide the controlled reactance. The primary coil is arranged to encircle the control cores and coils and the secondary coil so that the primary coil is subject to the controlled reactance of the control cores.

Abstract: A variable inductor includes a coil, a moveable contactor, and moveable magnetic material caused to move proximate the coil and simultaneously with the contactor. The contactor establishes first and second portions of the coil and, relative to the condition using no magnetic material, the inductance of the first portion is increased while the inductance of the second portion is substantially unchanged. Thus, over substantially all the tuning range, the first portion inductance is maintained greater than the second portion inductance.

Abstract: A method and apparatus for measuring the thickness of an ice sheet floating on a body of sea water is disclosed. The electrical inductance of a coil embedded in an ice sheet is measured. This inductance is solely dependent on the geometrical factors of the coil and is minimally affected by variations in salinity of the sea water on which the ice sheet is floating. The measured inductance is the actual inductance only of the part of the coil in the ice. The other part of the coil, protruding in the sea water, is shorted out by the sea water. Hence, the thickness of the ice sheet is directly related to the measured inductance.

Abstract: As part of a moveable carriage assembly, a plurality of trolley wheels are capable of being driven, in worm-gear fashion, along a coil which is rotatable about its axis. One end of the coil is conductive and the other end of the coil is preferably non-conductive. A further part of the traveling carriage assembly electrically interconnects a conductive trolley wheel with an electrical contact situated remote from one end of the coil. Multiple conductive wheels are electrically interconnected.

Abstract: A plurality of moveable contactors may travel along a rotating coil, one end of which is conductive and the other end of which is non-conductive. Two or more electrically interconnected moveable contactors effect a shorting across unused electrical turns and thereby affect unused coil portion resonance. For tuning conditions where very little of the coil is unused, the non-conductive coil portion serves as a sidetrack onto which one or more contactors can move and acts as a mechanical storage or memory for preserving relative positions between contactors.

Abstract: A high power, high frequency radio transmitter is connected to an antenna through an adjustable impedance coupling device which comprises a helical coil having a number of straight-sided triangular turns. Remotely operable, pneumatic cylinders are mounted on each side or segment of the coil turns in electrical contact therewith and have piston rods which can be moved into and out of electrical contact with a respective fixed conductive member or bus disposed alongside the coil. Additionally, a number of capacitors can be connected into the coupler circuit as required by the similar movement of piston rods into contact with a similar bus, each such piston rod being housed within a pneumatic cylinder electrically connected to a respective one of such capacitors.

Abstract: An electrical component such as a base loading coil assembly for a fixed length mobile radio antenna is disclosed featuring an electrical coil having a series of windings and an adjustable shorting screw disposed in line with the longitudinal axis of the coil and being rotatable on at least a portion of the windings so as to translate along the longitudinal axis of the coil to vary the inductance thereof.

Abstract: A transducer having a primary coil and at least one secondary coil wound on a hollow support with a number of electrically conducted links axially spaced along the secondary coil with the links connecting spaced turns of the secondary coil so that the transducer when in use has an output of desired form. The transducer is particularly useful for producing an output voltage from which the position of the core and anything connected to it can be deduced.

Abstract: The method of and apparatus for changing the inductance of a high power air core coil through the process of selectively shorting out predetermined numbers of turns. The apparatus comprises a conductive belt which is positioned interior the coil whereby the problems of corona discharge from the winding contents are substantially reduced. Since the shorting conductor is a thin film of conductive material attached to a tape, the mass is very low and vibration forces applied to the unit have much less effect in producing interruptions of contact.