Patents by Inventor Craig N. Boyer
Craig N. Boyer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8079352Abstract: An electromagnetic rail gun launcher for launching an armature attached to a projectile includes a barrel, having a bore, and a body that includes a pair of main rails, a first pair of augmenting rails one of each lying outboard of and coextending with each of one of the main rails from the breech to the muzzle, a second pair of augmenting rails one of each lying outboard of and coextending with one of each of the first pair of augmenting rails, a first pair of electrically-conducting crossovers proximate to the breech and a second pair of electrically-conducting crossovers proximate to the muzzle and connected in series when the armature is positioned in the bore with power provided to the launcher. The exit speed of the projectile from the launcher is controlled by controlling the current to the launcher.Type: GrantFiled: June 24, 2010Date of Patent: December 20, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: Michael J. Veracka, Craig N. Boyer, Jesse M. Neri, Raymond J Allen, Irwin L. Singer
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Patent number: 7672355Abstract: A two-wire metal vapor vacuum arc (MeVVA) vacuum head includes an upper housing and a lower vacuum housing. The lower vacuum housing includes a plurality of ports, a vacuum space, and a first grid positioned in the vacuum space. A plurality of electrodes are positioned in the ports with a first end with an electrical contact area extending into the upper housing, and a second end extending into the vacuum space with an exposed electrical discharge area spaced from the first grid. An electrode of opposite polarity is positioned in one of the lower housing ports with a first end extending into the upper housing and a second end attached to the first grid. An extractor grid is positioned adjacent to the first grid, an electrode selector is operatively connected to the plurality of electrodes, and a trigger generator circuit is connected to an input of the electrode selector.Type: GrantFiled: June 27, 2006Date of Patent: March 2, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Glenn E Holland, Craig N Boyer, John F Seely
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Patent number: 6690566Abstract: A trigger circuit is provided for a trigger system for a Marx generator column. The column includes a plurality of metal electrode pairs wherein the electrodes of each pair are spaced to form a spark gap therebetween and a capacitor is connected across each gap. The trigger system includes a three electrode (trigatron) spark gap switch forming the first spark gap of the Marx generator column. The triggering circuit includes a trigger transformer having primary and secondary windings. The secondary winding is connected through a connecting cable to a blocking capacitor of an input circuit of the trigatron switch. A charging capacitor is connected to an oscillator power supply so as to be charged thereby to the output voltage (e.g., 345 volts) of the oscillator power supply. An electronic switch (e.g.Type: GrantFiled: February 8, 2001Date of Patent: February 10, 2004Assignee: The United States of America as represented by the Secretary of the NavyInventors: John F. Seely, Craig N. Boyer, Glenn E. Holland
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Publication number: 20020105773Abstract: A trigger circuit is provided for a trigger system for a Marx generator column. The column includes a plurality of metal electrode pairs wherein the electrodes of each pair are spaced to form a spark gap therebetween and a capacitor is connected across each gap. The trigger system includes a three electrode (trigatron) spark gap switch forming the first spark gap of the Marx generator column. The triggering circuit includes a trigger transformer having primary and secondary windings. The secondary winding is connected through a connecting cable to a blocking capacitor of an input circuit of the trigatron switch. A charging capacitor is connected to an oscillator power supply so as to be charged thereby to the output voltage (e.g., 345 volts) of the oscillator power supply. An electronic switch (e.g.Type: ApplicationFiled: February 8, 2001Publication date: August 8, 2002Inventors: John F. Seely, Craig N. Boyer, Glenn E. Holland
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Patent number: 6285740Abstract: A dual-energy x-ray system is provided which is useful in densitometry and other applications. A dual energy x-ray source, formed field emission x-ray tube driven by a Marx generator, produces a single x-ray pulse of a very short duration (e.g., 10 to 200 nanoseconds). The pulse provides x-ray energy of a first, high value early in the pulse and x-ray energy of a second, lower value later in the pulse so as to provide a dual energy level x-ray distribution comprising hard and soft x-rays. A detector system having dual x-ray energy discrimination properties, formed by soft and hard x-ray detectors and an inter-detector, receives the x-ray pulse and discriminates between the dual x-ray energy levels of the pulse.Type: GrantFiled: October 13, 1999Date of Patent: September 4, 2001Assignee: The United States of America as represented by the Secretary of the NavyInventors: John F. Seely, Craig N. Boyer, Glenn E. Holland
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Patent number: 6205200Abstract: A portable X-ray unit, of a relatively light-weight, occoping a volume of less then one-half a cubic foot containing an x-ray head assembly, a unique Marx generator, a plurality of spark-gap switches and control electronics is disclosed. The Marx generator allows for the development of a relatively high voltage in excess of 100 kV, yet allows for the discharge thereof within the nanosecond range. The Marx generator is enclosed by an acrylic insulator that cooperates with an aluminum enclosure, which functions as a return current path for the capacitors in the Marx generator and also as a shield against the escape of electromagnetic radiation from the pulsed x-ray unit. The Marx generator and spark-gap switches are confined within the pressurized chamber that may contain nitrogen gas to reduce the separation of the gap in the spark-gap switches.Type: GrantFiled: October 28, 1996Date of Patent: March 20, 2001Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig N. Boyer, Glenn E. Holland, John F. Seely
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Patent number: 6166459Abstract: A mobile X-ray machine includes an improved Marx generator. The capacitors sed in the Marx generator are disc capacitors each having opposed side surfaces having electrodes formed thereon and each including a insulative coating provided on the peripheral edge thereof. The capacitors are mounted in slots in a support structure and are supported by spring contact members located within the slots. The spring contact members include spring arms which engage the electrodes on the opposed side surfaces of the associated capacitor. The spring contact members also include support elements from which are suspended the spherical electrodes of spark-gap switches individually associated with each of the capacitors.Type: GrantFiled: October 29, 1998Date of Patent: December 26, 2000Assignee: The United States of America as represented by the Secretary of the NavyInventors: Glenn E. Holland, Craig N. Boyer, John F. Seely
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Patent number: 6064718Abstract: A field emission X-ray tube is provided for use in a mobile X-ray machine. n evacuated ceramic housing having a convoluted interior shape for dissipating sparks surrounds the components of the field emission tube. A cathode and, an anode which emits x-rays, are located within the ceramic housing. A hollow anode tube is connected to the anode at one end and a vacuum pinch off element at the other end. Stray radiation is attenuated by a lead ring positioned inside of the ceramic housing.Type: GrantFiled: September 29, 1998Date of Patent: May 16, 2000Assignee: The United States of America as represented by the Secretary of the NavyInventors: Glenn E. Holland, Craig N. Boyer, John F. Seely