Abstract: Some embodiments include apparatuses providing control over movement of motorized transport units at a retail facility, comprising: multiple self-propelled motorized transport units; a wireless communication network; and a central computer system, wherein the central computer system comprises: a transceiver; a control circuit; and a memory storing computer instructions that when executed cause the control circuit to: receive an override command, from a worker associated with the retail facility, to cause a first motorized transport unit of the multiple motorized transport units to implement one or more actions; confirm a valid authorization of the worker to override one or more operating limits of the first motorized transport unit; and override the one or more operating limits and communicate one or more instructions to the first motorized transport unit configured to cause the first motorized transport unit to implement the one or more actions in accordance with the override command.

Abstract: A TENS apparatus includes a portable TENS device having a housing with a lower surface and a pair of integral electrodes that are incorporated into the lower surface of the housing. The portable TENS device includes a pulse driver that is located within the housing and adapted to generate a program of pulse waveforms for TENS therapy without a carrier wave, and a wireless transceiver component that is operatively connected to the pulse driver. The TENS apparatus includes a remote controller that is provided for communicating with the wireless transceiver component of the portable TENS device by means of a wireless communication signal in order to allow for wireless activation and control of the pulse driver of the portable TENS device.

Abstract: A medical device position guidance system having a noninvasive medical device communicable with an invasive medical device. The system provides outputs useful to assess the position of an invasive medical device in an animal, such as a human. A magnetic field is used to gather information about the position of the invasive device. Radio waves are used to communicate this information between the noninvasive device and the invasive device.

Abstract: A TENS apparatus includes a portable TENS device having a housing with a lower surface and a pair of integral electrodes that are incorporated into the lower surface of the housing. The portable TENS device includes a pulse driver that is located within the housing and adapted to generate a program of pulse waveforms for TENS therapy without a carrier wave, and a wireless transceiver component that is operatively connected to the pulse driver. The TENS apparatus includes a remote controller that is provided for communicating with the wireless transceiver component of the portable TENS device by means of a wireless communication signal in order to allow for wireless activation and control of the pulse driver of the portable TENS device.

Abstract: A TENS apparatus includes a portable TENS device having a housing with a lower surface, a pair of integral electrodes that are incorporated in the lower surface of the housing, and a pulse driver that is located within the housing and adapted to generate a program of pulse waveforms, each of which is an asymmetrical biphasic square waveform.

Abstract: A TENS apparatus includes a portable TENS device having a housing with a lower surface, a pair of integral electrodes that are incorporated in the lower surface of the housing, and a pulse driver that is located within the housing and adapted to generate a program of pulse waveforms, each of which is an asymmetrical biphasic square waveform.

Abstract: A medical device position guidance system having a noninvasive medical device communicable with an invasive medical device. The system provides outputs useful to assess the position of an invasive medical device in an animal, such as a human. A magnetic field is used to gather information about the position of the invasive device. Radio waves are used to communicate this information between the noninvasive device and the invasive device.

Abstract: A medical device position guidance system having a noninvasive medical device communicable with an invasive medical device. The system provides outputs useful to assess the position of an invasive medical device in an animal, such as a human. A magnetic field is used to gather information about the position of the invasive device. Radio waves are used to communicate this information between the noninvasive device and the invasive device.

Abstract: A medical device position guidance system having a noninvasive medical device communicable with an invasive medical device. The system provides outputs useful to assess the position of an invasive medical device in an animal, such as a human. A magnetic field is used to gather information about the position of the invasive device. Radio waves are used to communicate this information between the noninvasive device and the invasive device.

Abstract: A DC motor control circuit includes a pair of substantially identical unipolar control circuits. Each of the unipolar control circuits are connected between a respective current source and a current input to the motor. Each of the unipolar control circuits includes a solid state switch located between a motor current input and the source of direct current. The degree to which the solid state switch allows current to flow to the motor is controlled by an input bias signal to the switch. Current limiting for adjusting the input bias signal according to the current flowing through the motor is provided in one way of controlling the motor movement.

Abstract: A circuit and method of reducing the occurrence of overheating of a power fold vehicle mirror. The circuit controls the operation of the power fold mirror such that when a portion of the circuit reaches or exceeds a predetermined temperature threshold, the vehicle mirror is prevented from at least folding in. In practice, the vehicle mirror will be allowed to fold out even when the predetermined temperature threshold has been reached or exceeded, to allow the vehicle door to be opened and the car to be driven. The vehicle mirror may be allowed to be folded in when the temperature of the circuit falls to or below a second predetermined temperature threshold.

Abstract: A circuit and method of reducing the occurrence of overheating of a power fold vehicle mirror. The circuit controls the operation of the power fold mirror such that when a portion of the circuit reaches or exceeds a predetermined temperature threshold, the vehicle mirror is prevented from at least folding in. In practice, the vehicle mirror will be allowed to fold out even when the predetermined temperature threshold has been reached or exceeded, to allow the vehicle door to be opened and the car to be driven. The vehicle mirror may be allowed to be folded in when the temperature of the circuit falls to or below a second predetermined temperature threshold.

Abstract: A system for externally locating a sensor in tissue, comprising an external probe including at least first and second electromagnetic output coils with non-parallel longitudinal axes; and output coil driver for alternately energizing the first and second output coils, for generating a time-varying magnetic field which penetrates the patient's skin; a sensor coil, having a longitudinal axis, for developing an induced electrical voltage in response to the time-varying magnetic field; a distance determinator, responsive to the induced voltage from the sensor coil, for determining from the induced voltage, the distance between the output coils and the sensor coil, independently of the relative angle, in a horizontal plane, between the sensor coil longitudinal axis, and the longitudinal axes of the output coils; and a direction determinator for determining and displaying the direction, in the horizontal plane, in which the sensor coil longitudinal axis is pointing.

Abstract: A system for externally locating the depth and orientation of a catheter in tissue with an external probe which generates a virtual rotating magnetic field. The catheter includes an inductive coil for developing an induced signal in response to the virtual rotating magnetic field. An indicating device such as a light bar display or digital readout indicates the strength of the induced signal for locating, independently of the relative angular orientation of the probe and the catheter, the depth in the tissue of the catheter.

Abstract: A method and apparatus (10) for determining accurately the location of the tip (14) of a catheter (16) inside biological tissue is disclosed including a locator (34) having a coil (38) wound axially on a core (36) and a detector (12) in the form of a coil (28) wound on a core (24) removably positionable within catheter (16) adjacent the tip (14). A controller (20) generates AC current to coil (38) to produce an electromagnetic field and compares it with the output voltage developed in coil ( b 28) when the locator (34) comes within close physical proximity to detecetor (12). Locator (34) includes an amber LED indicator (42) which is energized when the locator (34) is behind the detector (12) and the monitored output voltage is in phase with the generated alternating current and includes a red LED indicator (44) which is energized when the locator (34) is beyond the detector (12) and the monitored output voltage is 180.degree. out of phase with the generated alternating current.

Abstract: A needle or cannula set especially adapted to access an implanted drug delivery portal includes a rigid base having a flat undersurface and a low profile. The base supports one end of a needle so that the needle projects from the base perpendicular to the base undersurface. One end of a flexible tube is secured to the base in fluid communication with the needle and the opposite end of the tube is terminated by a connector. A complaint pad is mounted to the base undersurface to assure proper seating of the base against the skin of the patient when the needle unit is inserted in the patient. The set also includes a handle which releasably connects to the base to facilitate inserting the needle unit into and withdrawing it from the patient and an adhesive dressing which is arranged to drape over the base with its edge margin extending all around the base for anchoring the needle unit to the patient and for providing an occlusive seal all around the puncture site.