摘要:
A media path control device has two sets of parallel arms with opposing rollers to manipulate the movement of print media. The arms are moveable in a substantially vertical plane through motors. The arms can be of different lengths to establish an optimal trajectory or height of the media to change the trajectory or travel path of the media. The rollers are reversible to change the trajectory or travel path of the media. Rotation of the arms may be stopped at various points along their travel arc to position the media at a desired or plane.
摘要:
An embodiment of the present invention improves the efficiency of radio frequency identification (RFID) systems and helps to extend the effective read range for certain configurations of closely spaced RFID tags. Specifically, an embodiment helps to minimize energy losses that result when there is excess energy from the excitation source. This excess energy has the potential to damage the circuitry in RFID tags. A shunt regulator is often used to protect the RFID circuitry by clamping the voltage, but has the undesirable effect of converting this excess excitation energy into heat. Various embodiments are directed toward using only as much of the excitation energy as necessary to power the RFID circuitry. These embodiments include circuitry for a constant current power supply that can be implemented either with discrete components or built into a new ASIC design; a network that minimizes the amount of energy that is converted to heat by the shunt regulator built into many RFID circuits; and/or a sleep mode for reducing the energy consumed by an RFID tag after it has been read. An embodiment may have the benefit of making more of the excitation energy available to power other RFID tags nearby—thereby improving system performance and read range.
摘要:
In one embodiment the present invention includes an RFID gaming token with a ferrite core. When the RFID gaming tokens are stacked, the ferrite cores steer the flux field from the excitation antenna through the center of the annular antennas in each token. The resulting flux field increases the efficiency of the energy transfer from the excitation antenna to the passive tags. This increased efficiency also improves the data transfer to and from the passive tags. This increased efficiency allows for reading RFID gaming tokens at a higher stack height (or at a better error rate for a given stack height) as compared to existing air core gaming tokens.
摘要:
A multiple axis joystick employs positionable and fixed electrode assemblies having mutually orthogonal sets of spaced apart electrodes. The electrode spacings depend on the rotational and translational movements of the positional electrodes relative to the fixed electrodes. A signal generator applies an electromagnetic signal to one set of the electrodes. The signal is coupled to the closest associated electrodes of the other set of electrodes to a degree dependent on the rotation- and translation-induced spacings. A controller sequentially detects and processes each coupled signal voltage to determine a degree of deflection in the X-, Y-, Z-, roll-, pitch-, and yaw-axis directions of one set of the electrodes relative to the other set of electrodes.
摘要:
A six axis joystick (110) employs a 13 pole E-core (112) that includes a center pole (114) and four triads of outer poles (116, 118, 120, 122) that protrude from four orthogonally separated arms (124, 126, 128, 130) of the E-core. A drive winding (132) is wound around the center pole of the E-core, and sense windings (134, 136, 138, 140) are wound around each outer pole in each triad of outer poles. A compression spring (144) suspends a ferromagnetic swash plate (142) at substantially equal distances from the center pole and each of the outer poles. A user employs an actuator handle (148) to axially and rotationally deflect the swash plate to assume varying distances from the center pole and each of the outer poles. A varying magnetic flux induced by the center pole is conducted through the swash plate to each of the outer poles to a degree dependent on the spacing between each outer pole and a bottom surface (146) or a periphery (147) of the swash plate. Corresponding signal currents are induced in the sense windings. Each of the signal currents is proportional to the degree of magnetic flux flowing in its associated outer pole. A peak amplitude is detected for each signal current and the differences among the peak amplitudes are used to determine a degree of deflection of the swash plate in each of the X-, Y-, Z-, roll-, pitch-, and yaw-axis directions.
摘要:
Laparotomy sponges comprising one or more closed metal wire loops incorporated into the fabric of the sponge are disclosed. The wire is of a gauge that is detectable by a metal detector. At least 50% of the area of the sponge is circumscribed by the one or more closed metal wire loops.
摘要:
In one embodiment the present invention includes an RFID gaming token with a ferrite core. When the RFID gaming tokens are stacked, the ferrite cores steer the flux field from the excitation antenna through the center of the annular antennas in each token. The resulting flux field increases the efficiency of the energy transfer from the excitation antenna to the passive tags. This increased efficiency also improves the data transfer to and from the passive tags. This increased efficiency allows for reading RFID gaming tokens at a higher stack height (or at a better error rate for a given stack height) as compared to existing air core gaming tokens.
摘要:
A system for controlling slack in a winch rope associated with a vehicle can include a winch, a plow, and a support member pivotably coupled to the plow and carrying a pulley that receives the rope for raising and lowering the plow. A limit switch can be operatively associated with the winch and configured to selectively enable and disable lowering of the plow by the winch. A first member can be carried by the support member and operatively associated with the switch. A biasing member can bias the support member to a first position when a load on the winch rope is below a predetermined threshold. The first member can be in at least substantial alignment with the switch when in the first position. The switch can change an activation state upon the first member being in the first position to automatically disable lowering of the plow by the winch.
摘要:
An athletic performance measurement system determines the reaction time, performance time and response time for an athlete to perform an event. A timing processor is in communication with two spaced-apart switches and when the athlete activates the first switch, it sets in motion a system for randomly activating a transducer that alerts the athlete to start the test. The athlete manipulates the first switch in response to detecting the activated transducer while the device measures the time it takes for this activity, thereby defining the athlete's reaction time. Then, the athlete manipulates the spaced apart second switch while the system monitors the time it takes to perform this task, thereby defining the athlete's performance time. The total response time is then calculated by adding the reaction time to the performance time. A testing protocol for performing a plurality of timed tests and averaging the scores is also disclosed.
摘要:
Method and apparatus for making depth related measurements from an untethered, gravity driven oceanographic platform. The platform is a smooth streamlined, torpedo shaped body releasably carrying ballast in its nose and covered with syntactic foam for buoyancy. At the appropriate depth, the ballast is released and the body ascends under control of an interferometric homing system which guides it to a recovery vessel. The ballast may be an iron slug held in place electromagnetically.