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  2. SimplexGrinnell - Wikipedia

    en.wikipedia.org/wiki/SimplexGrinnell

    Meanwhile, Edward G. Watkins founded the Simplex Time Recorder Company in 1894. Watkins invented and patented one of the first practical time clocks, along with the synchronized clock systems seen in schools up until recent times. The company, located in Gardner, Massachusetts, purchased the IBM Time Equipment Division in 1958. [7]

  3. Clock network - Wikipedia

    en.wikipedia.org/wiki/Clock_network

    The master clock in a clock network can receive accurate time in a number of ways: through the United States GPS satellite constellation, a Network Time Protocol server, the CDMA cellular phone network, a modem connection to a time source, or by listening to radio transmissions from WWV or WWVH, or a special signal from an upstream broadcast network.

  4. GNSS applications - Wikipedia

    en.wikipedia.org/wiki/GNSS_applications

    GNSS can be used as a reference clock for time code generators or Network Time Protocol (NTP) time servers. Sensors (for seismology or other monitoring application) can use GNSS as a precise time source. Time-division multiple access (TDMA) communications networks often rely on this precise timing to synchronize RF generating equipment, network ...

  5. Time clock - Wikipedia

    en.wikipedia.org/wiki/Time_clock

    Electronic time clock. A time clock, sometimes known as a clock card machine, punch clock, or time recorder, is a device that records start and end times for hourly employees (or those on flexi-time) at a place of business. In mechanical time clocks, this was accomplished by inserting a heavy paper card, called a time card

  6. Holdover in synchronization applications - Wikipedia

    en.wikipedia.org/wiki/Holdover_in...

    A GPS outage however is not initially an issue because clocks can go into holdover, [15] allowing the interference to be alleviated as much as the stability of the oscillator providing holdover will allow. [4] The more stable the oscillator, the longer the system can operate without GPS.

  7. Cogent Systems - Wikipedia

    en.wikipedia.org/wiki/Cogent_Systems

    Cogent Systems, Inc. is a manufacturer of automated fingerprint identification systems (AFIS). On January 20, 2006, the City of Pasadena (CA) announced Cogent Systems' impending relocation from South Pasadena to Pasadena. [4] On August 30, 2010, 3M announced they had acquired Cogent Systems for $943M. [5]

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