System for synchronizing signals on a two-wire line

Patent 4864296 Issued on September 5, 1989. Estimated Expiration Date:

July 8, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Communication system and method
Patent #: 4520488
Issued on: 05/28/1985
Inventor: Houvig , et al.

Voltage pulse to current regulating convertor
Patent #: 4604566
Issued on: 08/05/1986
Inventor: Sterling, Jr. , et al.

Amplitude modulation of control signals over electrical power lines utilizing the response of tuning fork filters Patent #: 4782322
Issued on: 11/01/1988
Inventor: Lechner , et al.

Inventors

Assignee

Formula Systems Limited

Application

No. 07/216611 filed on 07/08/1988

US Classes:

340/870.19, Pulse326/52, EXCLUSIVE FUNCTION (E.G., EXCLUSIVE OR, ETC.)375/354SYNCHRONIZERS

Examiners

Primary: Yusko, Donald J.
Assistant: Queen, Tyrone

Attorney, Agent or Firm

Christie, Parker & Hale

International Classes

B66B 13/26 (20060101)
B66B 13/24 (20060101)
H04B 3/54 (20060101)
E05F 15/20 (20060101)
G01S 15/00 (20060101)
G01S 15/88 (20060101)
G01S 17/02 (20060101)
G01S 17/00 (20060101)
G01S 17/87 (20060101)
E05F 15/00 (20060101)

Foreign Application Priority Data

1985-11-06 GB

Abstract

A system for synchronizing pulse signals transmitted between two stations using only two conductor lines includes a synchronization circuit. The circuit includes two modulators and two EXCLUSIVE-OR gates for controlling when data pulses are transmitted and when synchronization pulses are transmitted.