Abstract: A linac-based X-ray system for cargo scanning and imaging applications uses linac design, RF power control, beam current control, and beam current pulse duration control to provide stable sequences of pulses having different energy levels or different doses.

Abstract: A linac-based X-ray system for cargo scanning and imaging applications uses linac design, RF power control, beam current control, and beam current pulse duration control to provide stable sequences of pulses having different energy levels or different doses.

Abstract: An image-guided radiotherapy system adapted to be juxtaposed adjacent a CT scanner comprises a frame having an orifice adapted to permit passage therethrough of a couch on which a patient is positioned, together with a gantry assembly rotatably mounted on the frame in which the gantry assembly comprises a shielding cylinder having an orifice therethrough in alignment with the orifice in the frame. The shielding cylinder has affixed thereto a linac-based treatment head configured to provide radiotherapy, and a beamstop positioned angularly opposite the treatment head to absorb radiation from the treatment head. The shielding cylinder provides sufficient shielding of radiation scattered from the patient and the remainder of the system to not require a conventional vault. In some embodiments an arch may be used instead of a cylinder.

Abstract: An image-guided radiotherapy system adapted to be juxtaposed adjacent a CT scanner comprises a frame having an orifice adapted to permit passage therethrough of a couch on which a patient is positioned, together with a gantry assembly rotatably mounted on the frame in which the gantry assembly comprises a shielding cylinder having an orifice therethrough in alignment with the orifice in the frame. The shielding cylinder has affixed thereto a linac-based treatment head configured to provide radiotherapy, and a beamstop positioned angularly opposite the treatment head to absorb radiation from the treatment head. The shielding cylinder provides sufficient shielding of radiation scattered from the patient and the remainder of the system to not require a conventional vault. In some embodiments an arch may be used instead of a cylinder.

Abstract: A linac-based X-ray system for cargo scanning and imaging applications uses linac design, RF power control, beam current control, and beam current pulse duration control to provide stable sequences of pulses having different energy levels or different dose.

Abstract: An image-guided radiotherapy system adapted to be juxtaposed adjacent a CT scanner comprises a frame having an orifice adapted to permit passage therethrough of a couch on which a patient is positioned, together with a gantry assembly rotatably mounted on the frame in which the gantry assembly comprises a shielding cylinder having an orifice therethrough in alignment with the orifice in the frame. The shielding cylinder has affixed thereto a linac-based treatment head configured to provide radiotherapy, and a beamstop positioned angularly opposite the treatment head to absorb radiation from the treatment head. The shielding cylinder provides sufficient shielding of radiation scattered from the patient and the remainder of the system to not require a conventional vault. In some embodiments an arch may be used instead of a cylinder.

Abstract: A linac-based X-ray system for cargo scanning and imaging applications uses linac design, RF power control, beam current control, and beam current pulse duration control to provide stable sequences of interleaved pulses having different energy levels, for example alternating 4 MeV and 6 MeV pulses or other energies where the difference in levels is at least approximately 1 MeV and less than approximately 5 MeV. The pulse repetition rate can be 100-400 pulses per second or more. In an embodiment, a cool down calculation is combined with automatic frequency control to provide stable energy and dose per pulse even upon restarting of pulsing after an “off” period of indeterminate duration.

Abstract: A linac-based X-ray system for cargo scanning and imaging applications uses linac design, RF power control, beam current control, and beam current pulse duration control to provide stable sequences of interleaved pulses having different energy levels, for example alternating 4 MeV and 6 MeV pulses or other energies where the difference in levels is at least approximately 1 MeV and less than approximately 5 MeV. The pulse repetition rate can be 100-400 pulses per second or more. In an embodiment, a cool down calculation is combined with automatic frequency control to provide stable energy and dose per pulse even upon restarting of pulsing after an “off” period of indeterminate duration.

Abstract: An inverter control is used to control the output of a distributed power generating station, such as a photovoltaic (PV) solar power station, connected to a power grid. The power station is connected to an inverter output. Pulse width modulation is used to shape the output in order to maximize power output within power quality parameters and provides control of a switching frequency of the inverter responsive to a sensed parameter. The technique allows an increase in output efficiency and provides for adjustment of power output to meet power quality parameters to an extent required in order to connect to the power grid.

Abstract: A group of solar power stations with inverters are adjusted in order to achieve optimum power output in accordance with maximum power-point tracking (MPPT). The MPPT data is used to perform adjustments. Power measurement factors, including Maximum Power Points (MPPs) are established to represent a bus-voltage setting that produces the maximum power output from an individual photovoltaic panel. These settings are established for the group so as to optimize power output under a variety of operating conditions.

Abstract: A power source affected by a geographically propagating condition (e.g. a weather-related condition) is monitored to detect changes in its power output. Characteristics of the monitored changes are analyzed to detect whether the changes are being caused by a geographically-propagating condition that could affect other power sources nearby. The information obtained from the measurements is used to extrapolate impending power-output changes in the same source, in one or more other sources, or in a collection of sources subject to effects of the propagating condition. The extrapolations enable one or more power generating systems associated with the source(s) to maintain the changes in its total power output within operating requirements.

Abstract: A crossing guard is disclosed which comprises an operator positioned on one side of a thoroughfare for raising and lowering an arm, a gate connected to the arm, a first lock positioned on the opposite side of the thoroughfare, a plurality of cables supported within the gate, joined together at fixed points intermediate the ends of the cables, and a first end assembly connectable with the cables and the gate at the end of the gate opposite the operator with the first end assembly engagable with the first lock. The device further comprises a second lock positioned on the side of the thoroughfare nearer said operator engagable with a second end assembly positioned on the end of the gate nearer said operator.

Abstract: A crossing guard is disclosed which comprises an operator positioned on one side of a thoroughfare for raising and lowering an arm, a gate connected to the arm, a first lock positioned on the opposite side of the thoroughfare, a plurality of cables supported within the gate, joined together at fixed points intermediate the ends of the cables, and a first end assembly connectable with the cables and the gate at the end of the gate opposite the operator with the first end assembly engagable with the first lock. The device further comprises a second lock positioned on the side of the thoroughfare nearer said operator engagable with a second end assembly positioned on the end of the gate nearer said operator.

Abstract: A system and method for transferring historic and instantaneous diagnostic data relating to performance of an inductive loop vehicle detector 10 is disclosed and claimed. The aforementioned date is gathered over a period of time, updated and stored in a detector unit 14 forming part of the system. The stored data is then used repeatedly to modulate visible light emitted by a light emitting device 22 on the unit 14 at such a rate that the data would not be discernible to a human. The data is received by a portable data reading device 24 which is brought into optical communication with the device 22.

Abstract: A method of obtaining data relating to the performance of an inductive loop detector wherein a light source is modulated with a signal which is dependent on the data and the modulated signal is remotely detected and data extracted therefrom is stored for later processing.

Abstract: The miniaturized power relay for printed circuits comprises an electromagnetic circuit (2) complete with coil (39), a contact-holder block (3) provided with an actuator (25) and a protection and sealing covering (4); the magnetic circuit has exclusively a fixed supporting element (5) and a movable keeper element (6) the respective polar expansions whereof (7, 8) are conveniently shaped so as to reduce dimensions and are accommodated inside the coil to use all of the magnetic flux which is generated by the coil itself.

Abstract: A railway detection system in which the presence of a train is detected by means of first inductive loop apparatus. When the train is detected second inductive loop apparatus is enabled to detect the passage of wheels of the train.

Abstract: An inductive loop detector which includes a detector which is coupled to the loop by means of a parallel tuned circuit and a receiver which is coupled to the loop by means of a parallel tuned circuit, with the two tuned circuits having different resonant frequencies.

Abstract: A hysteresis brake assembly comprising a fan member, a vaned heat dissipating cover member, a pair of pole members, a pair of hub members and a disc shaped ferro-magnetic brake member. The fan propells air through holes provided in the cover and one pole member and the air is directed by vanes on a first hub member to flow (1) in part over one side of the brake disc and (2) in part through holes in the brake disc to the other side of the brake disc, where a second vaned hub directs the air over the other side of the brake disc; thereby cooling the brake disc on both sides. After cooling the brake disc, the air is forced outward from the brake assembly through escape holes provided in the cover member and one pole member.

Abstract: A power driven transmission assembly for an internal combustion engine, which assembly includes an endless V-belt that extends between a driving and a driven pulley. The driven pulley is subject to varying loads. The driving and driven pulleys each include first half portions which are transversely movable relative to the second half portions. By concurrently moving the second half portions relative to the first half portions, the effective pitch diameters of the driving and driven pulleys relative to the belt is varied for the transmission assembly to automatically deliver rotational power that in magnitude is related to a desired degree to the torque curve or torque capability of the prime mover with which the invention is associated. The effective pitch diameter ratio of the pulley system is changed by varying the pitch diameter of the driving pulley by power means.