FR2227571A1 - Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks - Google Patents

Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks

Info

Publication number
FR2227571A1
FR2227571A1 FR7315445A FR7315445A FR2227571A1 FR 2227571 A1 FR2227571 A1 FR 2227571A1 FR 7315445 A FR7315445 A FR 7315445A FR 7315445 A FR7315445 A FR 7315445A FR 2227571 A1 FR2227571 A1 FR 2227571A1
Authority
FR
France
Prior art keywords
clock
master clock
pulse train
centralised
information transmitted
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7315445A
Other languages
French (fr)
Other versions
FR2227571B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STIEVENARD PIERRE
Original Assignee
STIEVENARD PIERRE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by STIEVENARD PIERRE filed Critical STIEVENARD PIERRE
Priority to FR7315445A priority Critical patent/FR2227571A1/en
Publication of FR2227571A1 publication Critical patent/FR2227571A1/en
Application granted granted Critical
Publication of FR2227571B1 publication Critical patent/FR2227571B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0005—Transmission of control signals
    • G04G9/0011—Transmission of control signals using coded signals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

The information is transmitted between the digital master clock and each slave clock as a binary decimal code. The master clock (1, 2, 3, 4, 5) is associated with a pulse generator, (6) operating to periodically send a high frequency pulse train down the two wire line (7) connected to each slave clock (9, 8). The number of pulses in the pulse train correspond precisely to code of the master clock at that instance, with each slave clock having means for generating a code for control of the slave clock from the pulse train. Pref. a counter responds to the pulses sent down the line and the count is compared at each instant with a parity table, with the pulses blocked if parity between the pulse train and the table is not obtained.
FR7315445A 1973-04-27 1973-04-27 Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks Granted FR2227571A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7315445A FR2227571A1 (en) 1973-04-27 1973-04-27 Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7315445A FR2227571A1 (en) 1973-04-27 1973-04-27 Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks

Publications (2)

Publication Number Publication Date
FR2227571A1 true FR2227571A1 (en) 1974-11-22
FR2227571B1 FR2227571B1 (en) 1976-05-07

Family

ID=9118607

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7315445A Granted FR2227571A1 (en) 1973-04-27 1973-04-27 Centralised clock system for large buildings - has digital information transmitted between master clock and slave clocks

Country Status (1)

Country Link
FR (1) FR2227571A1 (en)

Also Published As

Publication number Publication date
FR2227571B1 (en) 1976-05-07

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Legal Events

Date Code Title Description
ST Notification of lapse