Abstract:
A data transmission system for the non-contact transmission of data between a station and a portable data card, both of which contain resonant circuits tuned to the same frequency. The data card receives power from the station via inductive coupling of the two resonant circuits and transmits data to the station by means of a loading circuit on the card which loads the card resonant circuit and hence, by mutual coupling, the station resonant circuit in response to data stored within the card. The card also contains a reading circuit containing a pulse generation circuit which generates a pulse whenever the power received by the card resonant circuit is interrupted and then restored. Data may thus be transmitted from the station to the card by deactuating the station resonant circuit in response to the data to be transmitted, the resulting pulses generated within the card being interpreted as the transmitted data.
Abstract:
A rotating gun stock for a firearm having a gun stock fore-end, the rotating gun stock comprising: a rotary positioning disc fixed within the fore-end, the fore-end having a distal end, a proximal end, and a longitudinal axis, the rotary disc fixed within the fore-end substantially at the distal end; the rotary disc further having a first and a second face and a center coaxial with the longitudinal axis, the first face directed towards the proximal end and the second face having a plurality of concentric accepting slots and a radial slot formed therein, the radial slot formed to communicate perpendicularly with the plurality of accepting slots; a butt positioned substantially perpendicularly to the fore-end at the distal end, the butt rotatably attached to the center of the rotary positioning disc, the butt constrained to rotate only about the longitudinal axis; a selector inserted within a selector slot in the butt, the selector protruding into the radial slot and thereby successively into the plurality of accepting slots; wherein rotation of the butt is configured to be selected by the selector to enable a plurality of butt rotational positions about the longitudinal axis, including a lock position of zero degrees.
Abstract:
A self-closing cap for the filling neck of a container, the self-closing cap having integral therewith a smart card having a container coil antenna for communicating with a supply station coil antenna fixed to a supply nozzle when the supply nozzle is inserted into the container through the self-closing cap.
Abstract:
A data transmission system for the non-contact transmission of data between a station and a portable data carrier. The station includes a station transmitter operating at a predetermined frequency for generating a first signal and a demodulator for detecting a second signal superimposed on the first signal. An antenna is coupled via a length of cable to the station transmitter via a matching circuit so as to be operative at said frequency regardless of the length of the cable. The portable data carrier includes supply means for coupling to a source of electric power and a data carrier tuned antenna circuit inductively coupled with the station transmitter so as to receive power from the station. A data carrier data modulator is provided for modulating the first signal with the second signal in response to data stored within the data carrier and, by means of said inductive coupling, enabling the data to be transmitted from the data carrier to the station.
Abstract:
Method and apparatus for simultaneously communicating with multiple smart card devices (17) supported on a common platform (16) so that each device has a respective chip (18) coupled to a respective communication interface (19). The common platform is positioned on a support surface (25) of a multi-head reader (21) so that the respective communication interface of each device is aligned with a respective head (23) of the reader; and multiple heads of the reader are simultaneously energized so as to effect communication with respective devices. The respective chip (18) and device coil antenna (19) of each of the smart card devices (17) may form a respective inlay, multiple inlays being integrally formed on a common inlay sheet constituting the common platform.
Abstract:
A multiple antenna reading system suitable for use with contactless transaction devices, the system including at least one reader, at least first and second antennas having at least some inductive coupling therebetween and being coupled to the at least one reader and antenna function disabling circuitry automatically operative upon activation of at least a first one of the at least first and second antennas to disable antenna function of at least a second one of the at least first and second antennas.
Abstract:
A data transaction system for process monitoring, with smart cards of the ISO geometric dimensions, featuring contact and bi-directional inductive coupling communication, for collecting and storing data. The system comprises fixed triggering stations for short range data transfer with the smart cards in response to emissions from sensors. The sensors report data related to variables such as location, device status, operation sequencing and time. A send-and-receive station allows for downloading of the stored data and for loading instruction sets in contact or contactless mode. The smart cards comprise a signal amplifier, transceivers, a processor, memories, timer, an on-board battery, cognizable non-compliance warning, optional feedback and energy saving procedures.
Abstract:
A data transaction device having a contactless mode of operation and comprising an antenna coil coupled to a processing unit via an antenna interface for allowing contactless data transmission between the data transaction device and a remote transceiver. A circuit within the antenna interface includes a modulator for modulating a signal transmitted by the remote transceiver and received by the antenna coil with outgoing data generated by the processing unit for transmitting via the antenna coil to the remote transceiver. The circuit further includes a variable loading circuit connected in series with a load seen by the antenna coil and having a capacitance connected across the load so as to effect a change in impedance of the load seen by the antenna coil thus allowing amplitude and/or phase modulation of said signal without complete interruption thereof and regardless of the magnitude of an external capacitance connected across the load. Preferably, the antenna interface may be customized for different applications and the data transaction device also includes a contact field thus allowing for either contact or contactless communication.
Abstract:
A data transaction device having contact and contactless modes of operation, comprises a semiconductor device for operating in contact and contactless modes in accordance with a respective contact or contactless data communications protocol. A contact field includes contacts fixedly connected to the semiconductor device for allowing data transmission between the contacts and the semiconductor device in accordance with the contact data communications protocol, whilst a coil antenna allows contactless data transmission between the coil antenna and the semiconductor device, in accordance with the contactless data communications protocol. An antenna interface coupled to the coil antenna, to the semiconductor device and to at least some of the contacts in the contact field is responsive to an electromagnetic field across the coil antenna for effecting contactless data transmission.