Cartridge actuated ordnance filter
a technology of ordnance filter and cartridge, which is applied in the direction of blasting cartridges, weapons, weapon components, etc., can solve the problem of skill in the art of deducing
Inactive Publication Date: 2002-08-06
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
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- Abstract
- Description
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AI Technical Summary
Benefits of technology
This present invention is specifically designed to protect cartridge actuated ordnance from high power EMR resulting from two bodies that are in proximity, or, are intermittently making contact. This environment is commonly known as Hazards of Electromagnetic Radiation to Ordnance (HERO). HERO tests are conducted at a broad range of frequencies using continuous wave and pulsed power modulations. The interaction between the two bodies, such as between a cartridge actuated ordnance device and a person's body loading such a device, causes arcing at various frequencies. The present invention also provides protection against ESD through ionization and filtering.
Problems solved by technology
Although a single capacitor is used in order to accomplish this and other objectives, the configuration and placement of the capacitor would not lead one skilled in the art to deduce that sufficient HERO protection would result.
Method used
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Embodiment Construction
The invention, as embodied herein, comprises a filtering device that provides electromagnetic radiation and electrostatic discharge protection for cartridge actuated ordnance. The cartridge portion of a cartridge actuated ordnance normally comprises a glass seal that provides a vacuum within the cartridge in order to function properly in actuating ordnance. In most configurations, the cartridge also comprises two leads that extend past the glass seal in order to attach the cartridge to the ordnance for actuation. The present invention comprises a capacitor that has an area sufficient to substantially cover the glass seal. The capacitor also comprises a low pass filter. The capacitor is connected to the cartridge leads so that it substantially covers the glass seal as noted above, but does not actually contact the seal. This configuration provides protection from electromagnetic radiation (EMR) and electrostatic discharge (ESD) through two different methods. First, by covering the gl...
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The present invention comprises a capacitor, of sufficient area to cover the glass seal of a cartridge actuated ordnance device, comprising a low pass filter. This capacitor connects to the leads of the cartridge actuated ordnance device in a fashion that covers the glass seal of the cartridge. Although the capacitor is not directly contacting the glass seal, it is located proximately so that very few frequencies of EMR can enter the seal, wherein a safe level of EMR is achieved. The capacitor also filters both EMR and ESD that come through the leads of the cartridge.
Description
BACKGROUND OF THE INVENTIONField of the InventionThe present invention pertains to an improvement to cartridge actuated ordnance. More particularly, the present invention adds or improves the following safety feature to such devices: shielding from electromagnetic radiation (EMR); filtering to eliminate EMR conducted along the firing leads of the device; and, increased protection against human borne electrostatic discharge (ESD) when handling the devices. The present invention accomplishes these tasks by incorporating a low-pass filter into the design of current devices.SUMMARY OF THE INVENTIONThe present invention comprises a capacitor, of sufficient area to cover the glass seal of a cartridge actuated ordnance device, having a capacitance value of from about 0.4 microfarads to about 1.1 microfarads. This capacitor connects to the leads of the cartridge actuated ordnance device in a fashion that covers the glass seal of the cartridge. Although the capacitor is not directly contacti...
Claims
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IPC IPC(8): F42B3/188F42B3/00
CPCF42B3/188
Inventor NIAL, JOHN A.DELEON, J. DAVIDKALOTERAKIS, NICKOLASKANG, THOMAS K.
Owner THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY