The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1976
Filed:
May. 23, 1975
Douglas Charles Smith, Locust, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A monobus conference arrangement is disclosed for use in a key telephone system. A conference circuit is serially inserted on each line and is arranged with an impedance element common to all of the stations using the line. In addition, a monobus circuit replaces the conventional hybrid in each station set. To avoid the problem of having more than one such impedance element connected in a multiline conference, the system is arranged so that current flows in a first direction through the conference circuit associated with the first-connected line and in a reverse direction through subsequently connected line conference circuits. Under control of the reverse current flow, the common impedance elements associated with the reverse current line conference circuits are removed from the connection.