Abstract: A method for generating electromagnetic waves in the ELF/ULF comprising the steps of using a ground-based Horizontal Electric Dipole (HED) antenna to send electromagnetic pulses upwardly in the E-region of the ionosphere to form an oscillatory or pulsed electric field; allowing said pulsed electric field to interact with magnetized plasma of the lower ionosphere to generate a pulsed horizontal and vertical current which have associated Horizontal and Vertical Electric Dipole moment; and allowing them to radiate.
Type:
Grant
Filed:
December 15, 2009
Date of Patent:
October 30, 2012
Assignee:
BAE Systems Information and Electronic Systems Integration Inc.
Abstract: For the purpose of providing an RF coil that prevents a troublesome force from arising when a hanging portion is lifted up, a pair of handhold members 308 is provided along a side that corresponds to an inner side of a cylinder 110, each member extending from one end to the other end of one of a pair of flexible substrates 304 so that an operator can lift the hanging portion up using such handhold member.
Type:
Grant
Filed:
October 15, 2002
Date of Patent:
February 17, 2004
Assignee:
GE Medical Systems Global Technology Company, LLC
Abstract: A test apparatus which having a window comparitor circuit which includes a coil. The coil is placed over a solenoid valve cartridge and switched on and off. The on time of the window comparitor circuit is measured to verify correct assembly of the solenoid valve cartridge.
Abstract: A magneto-system firing apparatus which is capable of rapidly detecting an abnormal state in the case where abnormality occurs in the make/break operation of a contact point due to damage of a breaker or the like.
Abstract: To provide a magneto-system firing apparatus which is capable of rapidly detecting an abnormal state in the case where abnormality occurs in the make/break operation of a contact point due to damage of a breaker or the like.
Abstract: A test circuit for setting the synchronizatiom of a dual ignition system, particularly of an aircraft engine dual magneto system, having an oscillator circuit 3, two transformers 23, 24 connected to the oscillator circuit, said transformers receiving the oscillator signal at a cener-tap of their primary windings, in which the primary windings are connected at one end to a common potential and having at least two connections for connecting the test circuit to the ignition system to be tested, said two connections each being connected to the other end of the primary winding 23, 24. Secondary windings 27, 28 of the transformers 23, 24 are connected to indicator elements 29, 30.