Abstract: A method of fault detection for battery chargers includes sensing a charge current applied to a battery with a resistive element. The method includes measuring a voltage across the resistive element. The method includes generating a trigger signal when the measured voltage across the resistive element exceeds a predetermined value. The method includes generating from the trigger signal an interrupt signal for a microprocessor. The method includes initiating an over-current handling routine in the microprocessor.
Type:
Application
Filed:
May 1, 2008
Publication date:
November 5, 2009
Applicant:
Symbol Technologies, Inc.
Inventors:
Kevin Cordes, Christopher R. Paul, Kenneth J. Rivalsi, Patrick Riechel
Abstract: A stop motion sensor supported by a mobile electro-optical reader is operative for sensing when the mobile reader is supported in a steady state by the operator for a predetermined time period, and for automatically actuating the mobile reader in response to sensing the steady state to initiate reading of indicia while the mobile reader is supported in the steady state by the operator for the predetermined time period.
Abstract: Techniques and technologies are provided for restarting a first wireless switch when the first wireless switch fails. For example, after the first wireless switch fails, the first wireless switch transmits a restart message to its peer wireless switches to begin re-establishing peering sessions with peer wireless switches. The first wireless switch resets its home wireless client database (HWCDb) with information from its data plane wireless client database (KWCDb), and transmits the updated information in its HWCDb to its peer wireless switches. The peer wireless switches store this information in their respective control plane wireless client databases (CPWCDbs), and initially mark the wireless client devices in the respective CPWCDbs as stale entries.
Abstract: Laser power control arrangements interrupt power to a laser used in electro-optical readers upon detection of an over-power condition not conforming to preestablished regulatory standards. In one embodiment, during an operational mode, a difference between laser drive currents at two operating points is compared to a difference between laser drive currents at the same two operating points during a calibration mode. The over-power condition is recognized when the difference during the operational mode exceeds the difference during the calibration mode by a predetermined amount. In another embodiment, the laser is only energized to emit the beam at a reduced power level well below regulatory standards for staring at even if a motor drive failed.
Type:
Grant
Filed:
September 30, 2005
Date of Patent:
October 27, 2009
Assignee:
Symbol Technologies, Inc.
Inventors:
Costanzo Difazio, Vladimir Gurevich, James Giebel, Gary G. Schneider, Matthew Blasczak, Mark A. Weitzner, Edward Barkan
Abstract: An electronic device having a receiver generating an analog signal from collected image data, a digitizer generating a digital signal from the analog signal and a micro-controller receiving the analog signal and the digital signal and generating a corrected digital signal, wherein the device outputs one of the digital signal and the corrected digital signal.
Type:
Grant
Filed:
December 14, 2007
Date of Patent:
October 27, 2009
Assignee:
Symbol Technologies, Inc.
Inventors:
Gary Schneider, James Giebel, Peter Fazekas, Dariusz Madej
Abstract: Methods, systems, and apparatuses for monitoring and refreshing data stored in radio frequency identification (RFID) tags are described. A voltage margin for data stored in memory of a tag is checked. If the voltage margin has decreased to an undesirable level, the data stored in the tag is refreshed.
Type:
Grant
Filed:
March 16, 2006
Date of Patent:
October 20, 2009
Assignee:
Symbol Technologies, Inc.
Inventors:
Randall Allen Drago, Ming-Hao Sun, Chun-Huei Bair, Kevin J. Powell, Omid Roshan-Afshar, Theodore Hockey, Jonathan Pfeifer
Abstract: A device for providing access to a remote site is disclosed. Access to the device is gained through an authentication process during which a user password and biometrics are provided to the device. The device also includes a security feature such that only authorized users of the specific device can gain access to it. Once authenticated, the device authorizes access to a remote site (e.g., a web site or a server on a local area network). The communications from the device to the remote site is encrypted and further the hand-held device uses a computer generated password to gain access to the site. In this way, user generated passwords, which are typically simple and infrequently changed, are avoided in favor of a more complex and frequently changed computer generated passwords for site access.
Type:
Grant
Filed:
March 16, 2004
Date of Patent:
October 13, 2009
Assignee:
Symbol Technologies, Inc.
Inventors:
Leemon C. Baird, III, Mance E. Harmon, R. Reed Young, James E. Armstrong, Jr.
Abstract: A system and method of securely allocating mobile devices is disclosed. A plurality of mobile devices are stored in an inoperative state under the control of a host computer. A user enters an identification code, which is received by the host computer, and the host computer selectively places a mobile device in an operative state based on the identification code. If the selected mobile device is not returned within a first predetermined interval, then the selected mobile device is placed back in the inoperative state. If the selected mobile device is not returned within a second predetermined interval, then all data within the selected mobile device's memory is purged. Additionally, the plurality of mobile devices can be stored in a secure area. Access to the secure area is granted based on the identification code.
Type:
Grant
Filed:
October 9, 2003
Date of Patent:
October 6, 2009
Assignee:
Symbol Technologies, Inc.
Inventors:
Fredrick J. Landram, Adam M. Petrovich, Joseph F. Soban, III
Abstract: An illuminator illuminates a symbol with a low level of illumination in a detection mode of operation to enable an imager to detect the symbol in a working range and in a field of view of the imager in an imaging reader, and also illuminates the symbol with a high level of illumination in a reading mode of operation to enable the imager to read the symbol.
Abstract: Systems and methods are provided to establish a set of dynamic channel masks that select channels to be scanned in a wireless environment during a mobile terminal roaming. The set of channel masks is associated with a set of scan groups determined through a Boolean operation applied to a set of scan variables determined via data indicators that reflect channel quality and/or presence in the vicinity of the mobile terminal. Regardless of actual access point geometric configuration in a quasi-two-dimensional coverage plan, a universal set of three scan groups can be determined. In addition to the universal set, a fail-safe set is computed in order to ensure successful scanning in various roaming scenarios. Quality of service indicators like communication reliability and battery performance can be improved by successively scanning the universal scan groups during roaming.
Abstract: Methods and systems are provided to facilitate communication with a plurality of remote units in a communication area that includes a plurality of spatial sectors. The system includes a network controller configured to receive and transmit under IEEE 802.11 specifications, and a plurality of directional antennas coupled to the network base station. Each of directional antennas functions as an access point for a respective spatial sector. The directional antennas and the network controller are combined as a single base station apparatus in an exemplary embodiment. Further, an exemplary network controller is configured to concurrently transmit a plurality of the data frames to more than one of the spatial sectors, and to synchronize the transmissions in a manner whereby all of the concurrently transmitted frames end simultaneously.
Abstract: Systems, devices and/or methods that facilitate improved form factors for RFID enabled mobile devices with RFID antenna component(s) are presented. These RFID antenna component(s) can be deployable, for example, foldable, slidable, detachable, or combinations thereof, among other means of deployment. By being able to place the RFID antenna component(s) in a packed configuration and/or one or more deployed configurations, the resulting improved form factor can improve usability, reduce maintenance complexity, and facilitate improved performance. Similarly, in a deployed configuration, the resulting form factor can function in a manner equivalent to, or at an improved level over, conventional devices, systems, and/or methods with regard to aspects related to the form factor.
Abstract: Described is a method for detecting activity on a frequency band. A wireless signal of a predetermined radio frequency band is received. The signal is processed into a plurality of subsignals, each subsignal corresponding to a particular radio frequency channel of the band. An energy level of the corresponding subsignal is determined, and, when the energy level is greater than a predetermined level, the corresponding channel is analyzed.
Abstract: Described is system and method for controlling power of a computing terminal with an external power source. In particular, a voltage is measured within a system using a voltage detector of a computing terminal. The system includes a battery which provides power to the system and the terminal. When the measured voltage changes to a first level, a first procedure is initiated to monitor the voltage for a time period. Upon expiration of the time period, if the monitored voltage has not changed to a second level, a second procedure is initiated to power off the terminal.
Abstract: Systems, devices and/or methods that facilitate thinner form factors and/or more robust mobile device enclosures by injection molding mobile device enclosures with panels are presented. These panels can include display panels, window panels and touch sensitive panels. Further, panels can be insert molded. Additionally, select panels can be contemporaneously molded by multi-shot injection molding at least a portion of the panel and a portion of the enclosure body. Multi-shot injection molding can include 2-shot injection molding, multi-shot injection molding, and co-injection injection molding. Injection molding a mobile device enclosure with a panel can provide improved form factor mobile device enclosures and/or provide a more robust mobile device enclosure than many traditional methods.
Type:
Application
Filed:
February 29, 2008
Publication date:
September 3, 2009
Applicant:
SYMBOL TECHNOLOGIES, INC.
Inventors:
Carl Thelemann, Thomas Wulff, Carl DeGiovine
Abstract: A method and imaging assembly (10) are disclosed adapted for reading soft indicia (14) on a mobile device (12). The imaging assembly (10) comprises a scanning arrangement (20) adapted for capturing images from the soft indicia (14). The scanning arrangement (20) has an optical axis with a symmetrically oriented field-of-view (24) about the optical axis that is directed at the soft indicia (14) during operation. The imaging assembly (10) further comprises an illumination source (34) positioned in a housing (18) to provide smart illumination (36) toward the soft indicia (14) to be imaged. The smart illumination (36) construct being that the illumination source (34) is position in close proximity to the optical axis without allowing reflected illumination to enter into the scanning arrangement (20) field-of-view (24) and the smart illumination construct further forming a narrow illumination field-of-view (38) that is projected at the soft indicia (14) during operation.
Abstract: A method of identifying or authenticating a product by providing an analog identification indicia including a randomized pattern of identification features on a first part of the product wherein one or more attributes of the randomized pattern of identification features correspond to an item identifier. A digital identification record is provided on a second part of the product including an encoded digital version of the item identifier. The product is viewed from two angles and confirmation of the information from both angles assures product authenticity.
Abstract: An RF addressable sensor network architecture is provided. The RF addressable sensor network includes one or more RF addressable sensors, one or more wireless sensor readers coupled to a communications network, and one or more end user devices coupled to the communications network. The RF addressable sensor network may also include a sensor network processor. An RF addressable sensor includes one or more sensor elements, one or more antennas for communicating with the wireless sensor reader, an RF power and communications interface, and RFID control module, and a sensor interface. The wireless sensor reader includes one or more antennas, a user interface, a controller, a network communications module, and an RF addressable sensor logic module.