摘要:
In a time keeping system providing time of day by radio signal to remote time keeping devices, the transmitted time of day is provided in association with a given time zone identification. The time keeping devices receiving the time of day reference and the time zone identification include a time zone preference identification. By comparing the time zone preference and the time zone identification transmitted, the time keeping device can, when necessary, offset the received time of day value according to user preference for display relative to a preferred time zone.
摘要:
A paging system where messages are numbered before they are transmitted. The paging receivers in the system compare both the number and the text information in each message which is received to the message number and the text information in the most recently received previous message. The comparison is used to determine if the same message was previously received and if the any messages were missed. The receiver includes an icon which is turned on to indicate if a message has been received. The icon is set to a blinking state if a message is received and if there is a break is the sequence of message numbers indicating that a message has been missed.
摘要:
The present invention provides a highly reliable radio paging system. The radio paging system of the present invention provides a combination of time, frequency and spacial diversity in order to increase the reliability of the system. Time diversity is provided by broadcasting the same message at a number of different times. Spacial diversity is achieved by broadcasting the same message from a number of different locations. Frequency diversity is achieved by broadcasting the same message at a number of different frequencies. The paging receiver according to the present invention is designed to receive messages on a number of different frequencies; however, the pager only responds to a message the first time that it receives the particular message. The combination of time, frequency, and spacial diversity provided by the present invention results in a highly reliable radio paging system.
摘要:
Group message delivery in a time multiplexed paging system is accomplished by providing in normal message packets a group ring indicator. A paging device collecting a message interrogates the group ring indicator to determine availability of a pending group message. If a group message is available, the paging device can target a dedicated time slot associated with group message transmission. In this manner, a single transmission of a group message is made available to all paging devices of the paging system. In one embodiment, the group ring indicator is a single bit indicating merely availability of a pending group message, the paging device then targeting and collecting the available group message to determine whether the paging device subscribes to that particular group message service. In a second embodiment, the group ring indicator indicates not only availability of a group message, but also the type of group message available. The paging device thereby determines based on the value of the group indicator whether the indicated available group message need be pursued.
摘要:
A paging receiver as part of an analog wristwatch. A received paging message is displayed using an analog watch mechanism which includes hands that are independently controllable. Around the perimeter of the watch face or on the watch bezel are marks representing paging messages, such as "Call Home", "Call Office" etc. Paging messages are displayed by using one of the hands which normally is used to indicate time to point to one of the marks or messages on the perimeter of the watch. Optional features include using the watch hands not used to point to a mark representing a received paging message to point to a predetermined location to alert the user that a message has been received and using an LED can be used to indicate that a message has been received or that a message is pending. Other analog mechanisms, such as disks, drums, and sliding bars visible through respective apertures in the watch face can be used to display information concerning paging messages. These other analog mechanisms can be moved such that a selected mark is visible through the respective aperture in response to receiving a paging message.
摘要:
A wristwatch paging receiver is provided with an antenna matching network that automatically retunes the network at the beginning of a listening interval. During the retuning operation, a control signal is applied to a variable tuning element in the matching network, such as a varactor diode, and is swept from a minimum value to a maximum value. This sweeping is desirably performed in discrete voltage steps that correspond to unit increments of varactor capacitance. A feedback signal from the receiver, such as an AGC signal, is monitored during this operation to note which varactor bias signal yields the maximum AGC signal. After the sweep is concluded, the apparatus applies to the varactor the bias voltage that yielded the maximum AGC signal during the sweeping operation. This bias voltage is maintained through the end of the listening interval. At the beginning of the next listening interval, the process may be repeated.
摘要:
A wide area paging system is disclosed in which paging messages input to the system in one local area can be broadcast to a receiver in any other local area without necessarily broadcasting the message in all areas. A local area clearinghouse in each area stores resident subscriber data including current location and receiver serial number. This data is used to transfer messages over a data network to the correct clearinghouse. The system uses a TDM data protocol. The data is encoded and transmitted at a very high rate (e.g., 19,000 baud) in short packets (256 bits/13 milliseconds) via stereo FM sidebands. Receivers are assigned to receive sequentially numbered time slots matching a portion of their address. The addresses of intended receivers are included in the data packets. Battery-powered receivers are deactivated between packets and reactivated in accordance with the sequential time slot number scheme to receive an incoming packet. Messages longer than a packet are segmented and transmitted in two or more packets, linked together by data contained in the packets. A watch pager used in the system employs a wristband antenna which electromagnetically couples to the user's body. The watch pager displays time, telephone numbers and icons representing common types of paging messages.
摘要:
Selectable receiver addressing is used to control how messages are output from different receivers. Users selectively enable and disable personal addresses in the receiver. The receiver polls time slots where the data for enabled addresses may be transmitted. Enabled addresses are compared with transmitted receiver addresses. If the transmitted address matches one of the enabled receiver addresses, the message is output to the receiver user. If the transmitted address does not match the receiver address, the message is not processed and, accordingly, the receiver operator is not disturbed.
摘要:
A utensil holder, supported by a vessel or container, permits a hand held utensil to be held until needed. The utensil for stirring or servicing or other operations is held conveniently above the vessel in a position which permits any residual contents from the vessel on the utensil to fall back into the vessel. A device to securely attach the utensil holder on the container is provided by an inner finger and outer spring arm with an upper stabilizer joined to the bottom end of the spring arm.
摘要:
A combined audio receiver and data receiver act in cooperation to serve audio presentation, digital collateral data presentation, and paging functions. The data receiver activates intermittently according to a time-division multiplexed broadcast protocol to receive paging data during brief time slots. At other times, the data receiver tunes to a frequency matching that of the audio receiver to receive digital collateral data descriptive of the audio presentation.