1990-08-15
1993-06-29
Bentley, Stephen C.
Ordnance
Accelerating
124 3, F41B 600
Patent
active
052236625
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an electrothermal accelerator.
A substantial feature of the invention lies in the fact that this electrothermal accelerator is electromagnetically amplified and this electromagnetic amplification is supplied with the same energy and operated with the same energy source as the electrothermal accelerator. In this way an additional energy source with a switch and electronic coupling circuit which would be needed for this purpose are avoided. The forms of the electromagnetic amplification which are explained here are so laid out that no switches are necessary.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevation section of a prior art electrothermal accelerator;
FIGS. 2A and 2B are respective side elevation and front elevation sections of an electrothermal accelerator according to this invention utilizing induction coils to electromagnetically amplify projectile emission in the primary chamber;
FIG. 3 is a side elevation section of a secondary acceleration chamber continued from the detail of FIG. 2A utilizing a burstable membrane with projectile to give final acceleration to a projectile from electrothermal light gas accelerator;
FIGS. 4A and 4B are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 2A and 2B utilizing an induction coil and capacitor for amplification of projectile acceleration from the primary chamber;
FIGS. 5A and 5B are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 2A and 2B utilizing a single induction coil spirally wound with a plurality of windings about the primary chamber for amplification of projectile acceleration from the primary chamber;
FIGS. 6A and 6B are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 2A and 2B utilizing a single induction coil spirally wound connected to a capacitor for amplification of projectile acceleration from the primary chamber;
FIGS. 7A and 7B are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 2A and 2B utilizing a circuit connected for the conventional actuation of the primary chamber connected through an induction coil for amplification of projectile acceleration from the primary chamber;
FIGS. 8A and 8D are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 2A and 2B utilizing an induction coil and with a primary chamber barrel wrapping loop for amplification of projectile acceleration from the primary chamber;
FIGS. 8B and 8E are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 8A and 8D utilizing an induction coil and with a primary chamber barrel wrapping loop for amplification of projectile acceleration from the primary chamber, the inductive coil here being shown connected across a capacitor; and,
FIGS. 8C and 8F are respective side elevation and front elevation sections of a primary chamber similar to FIGS. 8A and 8D utilizing a continuous induction coil with connected capacitor having a primary chamber barrel wrapping loop for amplification of projectile acceleration from the primary chamber.
The electrothermal accelerator in its simple form, as illustrated in FIG. 1, belongs to the prior art.
The discharge 14, 16 of a bank of capacitors C is directed via the switch S, which is preferably an ignition switch, to the electrode 1. A metal wire or a metal foil F is introduced between this electrode 1 and the electrode 2 between insulators I.sub.1, I.sub.2 and held together by bolts 12. On closing of the switch S this wire or foil F is heated up by the electrical current which is flowing, vaporised and ionised. A high temperature gas at a high pressure arises and is also termed a high pressure plasma. A material is preferably used here which has a low specific weight such as aluminium or lithium because only a little energy as possible need be expended for the acceleration of this gas. This high pressure plasma then expands into the pump tube T which
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Igenbergs Eduard
Rott Martin
Bentley Stephen C.
Igenwert GmbH
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